Merge pull request #4837 from mempool/mononaut/goggles-age-filter

Goggles age filter

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
     strategy:
       matrix:
-        node: ["18", "20"]
+        node: ["20", "21"]
         flavor: ["dev", "prod"]
       fail-fast: false
     runs-on: "ubuntu-latest"
@@ -29,13 +29,13 @@ jobs:
 
       - name: Read rust-toolchain file from repository
         id: gettoolchain
-        run: echo "::set-output name=toolchain::$(cat rust-toolchain)"
+        run: echo "::set-output name=toolchain::$(cat ./rust/gbt/rust-toolchain)"
         working-directory: ${{ matrix.node }}/${{ matrix.flavor }}
 
       - name: Install ${{ steps.gettoolchain.outputs.toolchain }} Rust toolchain
         # Latest version available on this commit is 1.71.1
         # Commit date is Aug 3, 2023
-        uses: dtolnay/rust-toolchain@f361669954a8ecfc00a3443f35f9ac8e610ffc06
+        uses: dtolnay/rust-toolchain@dc6353516c68da0f06325f42ad880f76a5e77ec9
         with:
           toolchain: ${{ steps.gettoolchain.outputs.toolchain }}
 
@@ -63,11 +63,104 @@ jobs:
         run: npm run build
         working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/backend
 
+
+  cache:
+    name: "Cache assets for builds"
+    runs-on: "ubuntu-latest"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: assets
+
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node }}
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Install (Prod dependencies only)
+        run: npm ci --omit=dev --omit=optional
+        working-directory: assets/frontend
+
+      - name: Restore cached mining pool assets
+        continue-on-error: true
+        id: cache-mining-pool-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: |
+            mining-pool-assets.zip
+          key: mining-pool-assets-cache
+
+      - name: Restore promo video assets
+        continue-on-error: true
+        id: cache-promo-video-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: |
+            promo-video-assets.zip
+          key: promo-video-assets-cache
+
+      - name: Unzip assets before building (src/resources)
+        continue-on-error: true
+        run: unzip -o mining-pool-assets.zip -d assets/frontend/src/resources/mining-pools
+
+      - name: Unzip assets before building (src/resources)
+        continue-on-error: true
+        run: unzip -o promo-video-assets.zip -d assets/frontend/src/resources/promo-video
+
+      # - name: Unzip assets before building (dist)
+      #   continue-on-error: true
+      #   run: unzip assets.zip -d assets/frontend/dist/mempool/browser/resources
+
+      - name: Sync-assets
+        run: npm run sync-assets-dev
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          MEMPOOL_CDN: 1
+          VERBOSE: 1
+        working-directory: assets/frontend
+
+      - name: Zip mining-pool assets
+        run: zip -jrq mining-pool-assets.zip assets/frontend/src/resources/mining-pools/*
+
+      - name: Zip promo-video assets
+        run: zip -jrq promo-video-assets.zip assets/frontend/src/resources/promo-video/*
+
+      - name: Upload mining pool assets as artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: mining-pool-assets
+          path: mining-pool-assets.zip
+
+      - name: Upload promo video assets as artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: promo-video-assets
+          path: promo-video-assets.zip
+
+      - name: Save mining pool assets cache
+        id: cache-mining-pool-save
+        uses: actions/cache/save@v4
+        with:
+          path: |
+            mining-pool-assets.zip
+          key: mining-pool-assets-cache
+
+      - name: Save promo video assets cache
+        id: cache-promo-video-save
+        uses: actions/cache/save@v4
+        with:
+          path: |
+            promo-video-assets.zip
+          key: promo-video-assets-cache
+
   frontend:
+    needs: cache
     if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
     strategy:
       matrix:
-        node: ["18", "20"]
+        node: ["20", "21"]
         flavor: ["dev", "prod"]
       fail-fast: false
     runs-on: "ubuntu-latest"
@@ -103,9 +196,167 @@ jobs:
       # - name: Test
       #   run: npm run test
 
+      - name: Restore cached mining pool assets
+        continue-on-error: true
+        id: cache-mining-pool-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: |
+            mining-pool-assets.zip
+          key: mining-pool-assets-cache
+
+      - name: Restore promo video assets
+        continue-on-error: true
+        id: cache-promo-video-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: |
+            promo-video-assets.zip
+          key: promo-video-assets-cache
+
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: mining-pool-assets
+
+      - name: Unzip assets before building (src/resources)
+        run: unzip -o mining-pool-assets.zip -d ${{ matrix.node }}/${{ matrix.flavor }}/frontend/src/resources/mining-pools
+
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: promo-video-assets
+
+      - name: Unzip assets before building (src/resources)
+        run: unzip -o promo-video-assets.zip -d ${{ matrix.node }}/${{ matrix.flavor }}/frontend/src/resources/promo-video
+
+      # - name: Unzip assets before building (dist)
+      #   run: unzip assets.zip -d ${{ matrix.node }}/${{ matrix.flavor }}/frontend/dist/mempool/browser/resources
+
+      - name: Display resulting source tree
+        run: ls -R
+
       - name: Build
         run: npm run build
         working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/frontend
         env: 
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          MEMPOOL_CDN: 1
+          VERBOSE: 1
+  
+  e2e:
+    if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
+    runs-on: "ubuntu-latest"
+    needs: frontend
+    strategy:
+      fail-fast: false
+      matrix:
+        module: ["mempool", "liquid"]
+        include:
+          - module: "mempool"
+            spec: |
+              cypress/e2e/mainnet/*.spec.ts
+              cypress/e2e/signet/*.spec.ts
+              cypress/e2e/testnet/*.spec.ts
+          - module: "liquid"
+            spec: |
+              cypress/e2e/liquid/liquid.spec.ts
+              cypress/e2e/liquidtestnet/liquidtestnet.spec.ts
 
+    name: E2E tests for ${{ matrix.module }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: ${{ matrix.module }}
+
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: 20
+          cache: "npm"
+          cache-dependency-path: ${{ matrix.module }}/frontend/package-lock.json
+
+      - name: Restore cached mining pool assets
+        continue-on-error: true
+        id: cache-mining-pool-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: |
+            mining-pool-assets.zip
+          key: mining-pool-assets-cache
+  
+      - name: Restore cached promo video assets
+        continue-on-error: true
+        id: cache-promo-video-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: |
+            promo-video-assets.zip
+          key: promo-video-assets-cache
+
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: mining-pool-assets
+
+      - name: Unzip assets before building (src/resources)
+        run: unzip -o mining-pool-assets.zip -d ${{ matrix.module }}/frontend/src/resources/mining-pools
+
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: promo-video-assets
+
+      - name: Unzip assets before building (src/resources)
+        run: unzip -o promo-video-assets.zip -d ${{ matrix.module }}/frontend/src/resources/promo-video
+      
+      - name: Chrome browser tests (${{ matrix.module }})
+        uses: cypress-io/github-action@v5
+        with:
+          tag: ${{ github.event_name }}
+          working-directory: ${{ matrix.module }}/frontend
+          build: npm run config:defaults:${{ matrix.module }}
+          start: npm run start:local-staging
+          wait-on: "http://localhost:4200"
+          wait-on-timeout: 120
+          record: true
+          parallel: true
+          spec: ${{ matrix.spec }}
+          group: Tests on Chrome (${{ matrix.module }})
+          browser: "chrome"
+          ci-build-id: "${{ github.sha }}-${{ github.workflow }}-${{ github.event_name }}"
+        env:
+          COMMIT_INFO_MESSAGE: ${{ github.event.pull_request.title }}
+          CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CYPRESS_PROJECT_ID: ${{ secrets.CYPRESS_PROJECT_ID }}
+
+  validate_docker_json:
+    if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
+    runs-on: "ubuntu-latest"
+    name: Validate generated backend Docker JSON
+
+    steps: 
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: docker
+      
+      - name: Install jq
+        run: sudo apt-get install jq -y
+
+      - name: Create new start script to run on CI
+        run: |
+          sed '$d' start.sh > start_ci.sh
+        working-directory: docker/docker/backend
+
+      - name: Run the script to generate the sample JSON
+        run: |
+          sh start_ci.sh
+        working-directory: docker/docker/backend
+
+      - name: Validate JSON syntax
+        run: |
+          cat mempool-config.json | jq
+        working-directory: docker/docker/backend

.github/workflows/cypress.yml

@@ -1,64 +0,0 @@
-name: Cypress Tests
-
-on:
-  push:
-    branches: [master]
-  pull_request:
-    types: [opened, synchronize]
-
-jobs:
-  cypress:
-    if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
-    runs-on: "ubuntu-latest"
-    strategy:
-      fail-fast: false
-      matrix:
-        module: ["mempool", "liquid", "bisq"]
-        include:
-          - module: "mempool"
-            spec: |
-              cypress/e2e/mainnet/*.spec.ts
-              cypress/e2e/signet/*.spec.ts
-              cypress/e2e/testnet/*.spec.ts
-          - module: "liquid"
-            spec: |
-              cypress/e2e/liquid/liquid.spec.ts
-              cypress/e2e/liquidtestnet/liquidtestnet.spec.ts
-          - module: "bisq"
-            spec: |
-              cypress/e2e/bisq/bisq.spec.ts
-
-    name: E2E tests for ${{ matrix.module }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-        with:
-          path: ${{ matrix.module }}
-
-      - name: Setup node
-        uses: actions/setup-node@v3
-        with:
-          node-version: 20
-          cache: "npm"
-          cache-dependency-path: ${{ matrix.module }}/frontend/package-lock.json
-
-      - name: Chrome browser tests (${{ matrix.module }})
-        uses: cypress-io/github-action@v5
-        with:
-          tag: ${{ github.event_name }}
-          working-directory: ${{ matrix.module }}/frontend
-          build: npm run config:defaults:${{ matrix.module }}
-          start: npm run start:local-staging
-          wait-on: "http://localhost:4200"
-          wait-on-timeout: 120
-          record: true
-          parallel: true
-          spec: ${{ matrix.spec }}
-          group: Tests on Chrome (${{ matrix.module }})
-          browser: "chrome"
-          ci-build-id: "${{ github.sha }}-${{ github.workflow }}-${{ github.event_name }}"
-        env:
-          COMMIT_INFO_MESSAGE: ${{ github.event.pull_request.title }}
-          CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          CYPRESS_PROJECT_ID: ${{ secrets.CYPRESS_PROJECT_ID }}

.github/workflows/get_backend_block_height.yml

@@ -0,0 +1,19 @@
+name: 'Check if servers are in sync'
+
+on: [workflow_dispatch]
+
+jobs:
+  print-backend-sha:
+    runs-on: 'ubuntu-latest'
+    name: Get block height
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: repo
+
+      - name: Run script
+        working-directory: repo
+        run: |
+          chmod +x ./scripts/get_block_tip_height.sh
+          sh ./scripts/get_block_tip_height.sh

.github/workflows/on-tag.yml

@@ -101,5 +101,7 @@ jobs:
           --platform linux/amd64,linux/arm64 \
           --tag ${{ secrets.DOCKER_HUB_USER }}/${{ matrix.service }}:$TAG \
           --tag ${{ secrets.DOCKER_HUB_USER }}/${{ matrix.service }}:latest \
+          --build-context rustgbt=./rust \
+          --build-context backend=./backend \
           --output "type=registry" ./${{ matrix.service }}/ \
           --build-arg commitHash=$SHORT_SHA

.gitignore

@@ -6,3 +6,4 @@ backend/mempool-config.json
 frontend/src/resources/config.template.js
 frontend/src/resources/config.js
 target
+docker/backend/start_ci.sh

Cargo.toml

@@ -1,8 +0,0 @@
-[workspace]
-members = [
-	"./backend/rust-gbt",
-]
-
-[profile.release]
-lto = true
-codegen-units = 1

LICENSE

@@ -1,29 +1,28 @@
-The Mempool Open Source Project
-Copyright (c) 2019-2023 The Mempool Open Source Project Developers
+The Mempool Open Source Project®
+Copyright (c) 2019-2023 Mempool Space K.K. and other shadowy super-coders
 
 This program is free software; you can redistribute it and/or modify it under
-the terms of (at your option) either:
+the terms of the GNU Affero General Public License as published by the Free
+Software Foundation, either version 3 of the License or any later version
+approved by a proxy statement published on <https://mempool.space/about>.
 
- 1) the GNU Affero General Public License as published by the Free Software
- Foundation, either version 3 of the License or any later version approved by a
- proxy statement published on <https://mempool.space/about>; or
+However, this copyright license does not include an implied right or license
+to use any trademarks, service marks, logos, or trade names of Mempool Space K.K.
+or any other contributor to The Mempool Open Source Project.
 
- 2) the GNU General Public License as published by the Free Software
- Foundation, either version 3 of the License or any later version approved by a
- proxy statement published on <https://mempool.space/about>.
+The Mempool Open Source Project®, Mempool Accelerator™, Mempool Enterprise®, 
+Mempool Liquidity™, mempool.space®, Be your own explorer™, Explore the full 
+Bitcoin ecosystem™, Mempool Goggles™, the mempool Logo, the mempool Square logo, 
+the mempool Blocks logo, the mempool Blocks 3 | 2 logo, the mempool.space Vertical 
+Logo, and the mempool.space Horizontal logo are registered trademarks or trademarks 
+of Mempool Space K.K in Japan, the United States, and/or other countries.
 
-However, this copyright license does not include an implied right or license to
-use our trademarks: The Mempool Open Source Project®, mempool.space™, the
-mempool Logo™, the mempool.space Vertical Logo™, the mempool.space Horizontal
-Logo™, the mempool Square Logo™, and the mempool Blocks logo™ are registered
-trademarks or trademarks of Mempool Space K.K in Japan, the United States,
-and/or other countries. See our full Trademark Policy and Guidelines for more
-details, published on <https://mempool.space/trademark-policy>.
+See our full Trademark Policy and Guidelines for more details, published on 
+<https://mempool.space/trademark-policy>.
 
 This program is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 PARTICULAR PURPOSE. See the full license terms for more details.
 
 You should have received a copy of both the GNU Affero General Public License
-and the GNU General Public License along with this program.  If not, see
-<http://www.gnu.org/licenses/>.
+along with this program. If not, see <http://www.gnu.org/licenses/>.

LICENSE.GPL-3.md

@@ -1,675 +0,0 @@
-### GNU GENERAL PUBLIC LICENSE
-
-Version 3, 29 June 2007
-
-Copyright (C) 2007 Free Software Foundation, Inc.
-<https://fsf.org/>
-
-Everyone is permitted to copy and distribute verbatim copies of this
-license document, but changing it is not allowed.
-
-### Preamble
-
-The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-
-The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works. By contrast,
-the GNU General Public License is intended to guarantee your freedom
-to share and change all versions of a program--to make sure it remains
-free software for all its users. We, the Free Software Foundation, use
-the GNU General Public License for most of our software; it applies
-also to any other work released this way by its authors. You can apply
-it to your programs, too.
-
-When we speak of free software, we are referring to freedom, not
-price. Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
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-To protect your rights, we need to prevent others from denying you
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-Developers that use the GNU GPL protect your rights with two steps:
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README.md

@@ -12,7 +12,9 @@ It is an open-source project developed and operated for the benefit of the Bitco
 
 Mempool can be self-hosted on a wide variety of your own hardware, ranging from a simple one-click installation on a Raspberry Pi full-node distro all the way to a robust production instance on a powerful FreeBSD server. 
 
-**Most people should use a one-click install method.** Other install methods are meant for developers and others with experience managing servers. 
+Most people should use a <a href="#one-click-installation">one-click install method</a>.
+
+Other install methods are meant for developers and others with experience managing servers. If you want support for your own production instance of Mempool, or if you'd like to have your own instance of Mempool run by the mempool.space team on their own global ISP infrastructure—check out <a href="https://mempool.space/enterprise" target="_blank">Mempool Enterprise®</a>.
 
 <a id="one-click-installation"></a>
 ## One-Click Installation
@@ -22,7 +24,8 @@ Mempool can be conveniently installed on the following full-node distros:
 - [RaspiBlitz](https://github.com/rootzoll/raspiblitz)
 - [RoninDojo](https://code.samourai.io/ronindojo/RoninDojo)
 - [myNode](https://github.com/mynodebtc/mynode)
-- [Start9](https://github.com/Start9Labs/embassy-os)
+- [StartOS](https://github.com/Start9Labs/start-os)
+- [nix-bitcoin](https://github.com/fort-nix/nix-bitcoin/blob/a1eacce6768ca4894f365af8f79be5bbd594e1c3/examples/configuration.nix#L129)
 
 **We highly recommend you deploy your own Mempool instance this way.** No matter which option you pick, you'll be able to get your own fully-sovereign instance of Mempool up quickly without needing to fiddle with any settings.
 

backend/.gitignore

@@ -7,6 +7,12 @@ mempool-config.json
 pools.json
 icons.json
 
+# docker
+Dockerfile
+GeoIP
+start.sh
+wait-for-it.sh
+
 # compiled output
 /dist
 /tmp
@@ -48,3 +54,6 @@ Thumbs.db
 
 # package folder (npm run package output)
 /package
+
+# Rust GBT folder (We build externally first)
+/rust-gbt

backend/README.md

@@ -2,7 +2,7 @@
 
 These instructions are mostly intended for developers. 
 
-If you choose to use these instructions for a production setup, be aware that you will still probably need to do additional configuration for your specific OS, environment, use-case, etc. We do our best here to provide a good starting point, but only proceed if you know what you're doing. Mempool only provides support for custom setups to [enterprise sponsors](https://mempool.space/enterprise).
+If you choose to use these instructions for a production setup, be aware that you will still probably need to do additional configuration for your specific OS, environment, use-case, etc. We do our best here to provide a good starting point, but only proceed if you know what you're doing. Mempool only provides support for custom setups to project sponsors through [Mempool Enterprise®](https://mempool.space/enterprise).
 
 See other ways to set up Mempool on [the main README](/../../#installation-methods).
 

backend/mempool-config.sample.json

@@ -1,5 +1,6 @@
 {
   "MEMPOOL": {
+    "OFFICIAL": false,
     "NETWORK": "mainnet",
     "BACKEND": "electrum",
     "ENABLED": true,
@@ -16,6 +17,7 @@
     "MEMPOOL_BLOCKS_AMOUNT": 8,
     "INDEXING_BLOCKS_AMOUNT": 11000,
     "BLOCKS_SUMMARIES_INDEXING": false,
+    "GOGGLES_INDEXING": false,
     "USE_SECOND_NODE_FOR_MINFEE": false,
     "EXTERNAL_ASSETS": [],
     "EXTERNAL_MAX_RETRY": 1,
@@ -26,21 +28,23 @@
     "POOLS_JSON_URL": "https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json",
     "POOLS_JSON_TREE_URL": "https://api.github.com/repos/mempool/mining-pools/git/trees/master",
     "AUDIT": false,
-    "ADVANCED_GBT_AUDIT": false,
-    "ADVANCED_GBT_MEMPOOL": false,
     "RUST_GBT": false,
+    "LIMIT_GBT": false,
     "CPFP_INDEXING": false,
     "DISK_CACHE_BLOCK_INTERVAL": 6,
     "MAX_PUSH_TX_SIZE_WEIGHT": 4000000,
     "ALLOW_UNREACHABLE": true,
-    "PRICE_UPDATES_PER_HOUR": 1
+    "PRICE_UPDATES_PER_HOUR": 1,
+    "MAX_TRACKED_ADDRESSES": 100
   },
   "CORE_RPC": {
     "HOST": "127.0.0.1",
     "PORT": 8332,
     "USERNAME": "mempool",
     "PASSWORD": "mempool",
-    "TIMEOUT": 60000
+    "TIMEOUT": 60000,
+    "COOKIE": false,
+    "COOKIE_PATH": "/path/to/bitcoin/.cookie"
   },
   "ELECTRUM": {
     "HOST": "127.0.0.1",
@@ -50,7 +54,10 @@
   "ESPLORA": {
     "REST_API_URL": "http://127.0.0.1:3000",
     "UNIX_SOCKET_PATH": "/tmp/esplora-bitcoin-mainnet",
+    "BATCH_QUERY_BASE_SIZE": 1000,
     "RETRY_UNIX_SOCKET_AFTER": 30000,
+    "REQUEST_TIMEOUT": 10000,
+    "FALLBACK_TIMEOUT": 5000,
     "FALLBACK": []
   },
   "SECOND_CORE_RPC": {
@@ -58,7 +65,9 @@
     "PORT": 8332,
     "USERNAME": "mempool",
     "PASSWORD": "mempool",
-    "TIMEOUT": 60000
+    "TIMEOUT": 60000,
+    "COOKIE": false,
+    "COOKIE_PATH": "/path/to/bitcoin/.cookie"
   },
   "DATABASE": {
     "ENABLED": true,
@@ -88,10 +97,6 @@
     "GEOLITE2_ASN": "/usr/local/share/GeoIP/GeoLite2-ASN.mmdb",
     "GEOIP2_ISP": "/usr/local/share/GeoIP/GeoIP2-ISP.mmdb"
   },
-  "BISQ": {
-    "ENABLED": false,
-    "DATA_PATH": "/bisq/statsnode-data/btc_mainnet/db"
-  },
   "LIGHTNING": {
     "ENABLED": false,
     "BACKEND": "lnd",
@@ -122,9 +127,12 @@
     "MEMPOOL_API": "https://mempool.space/api/v1",
     "MEMPOOL_ONION": "http://mempoolhqx4isw62xs7abwphsq7ldayuidyx2v2oethdhhj6mlo2r6ad.onion/api/v1",
     "LIQUID_API": "https://liquid.network/api/v1",
-    "LIQUID_ONION": "http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1",
-    "BISQ_URL": "https://bisq.markets/api",
-    "BISQ_ONION": "http://bisqmktse2cabavbr2xjq7xw3h6g5ottemo5rolfcwt6aly6tp5fdryd.onion/api"
+    "LIQUID_ONION": "http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1"
+  },
+  "REDIS": {
+    "ENABLED": false,
+    "UNIX_SOCKET_PATH": "/tmp/redis.sock",
+    "BATCH_QUERY_BASE_SIZE": 5000
   },
   "REPLICATION": {
     "ENABLED": false,
@@ -138,7 +146,11 @@
     ]
   },
   "MEMPOOL_SERVICES": {
-    "API": "https://mempool.space/api",
+    "API": "https://mempool.space/api/v1/services",
     "ACCELERATIONS": false
+  },
+  "FIAT_PRICE": {
+    "ENABLED": true,
+    "API_KEY": "your-api-key-from-freecurrencyapi.com"
   }
 }

backend/npm_package_rm_build_deps.sh

@@ -3,10 +3,7 @@ set -e
 
 # Cleaning up inside the node_modules folder
 cd package/node_modules
-rm -r \
+rm -rf \
   typescript \
   @typescript-eslint \
-  @napi-rs \
-  ./rust-gbt/src \
-  ./rust-gbt/Cargo.toml \
-  ./rust-gbt/build.rs
+  @napi-rs

backend/package.json

@@ -22,10 +22,12 @@
   "main": "index.ts",
   "scripts": {
     "tsc": "./node_modules/typescript/bin/tsc -p tsconfig.build.json",
-    "build": "npm run rust-build && npm run tsc && npm run create-resources",
+    "build": "npm run tsc && npm run create-resources",
+    "clean": "rm -rf ./dist/ ./node_modules/ ./package/ ./rust-gbt/",
     "create-resources": "cp ./src/tasks/price-feeds/mtgox-weekly.json ./dist/tasks && node dist/api/fetch-version.js",
     "package": "./npm_package.sh",
     "package-rm-build-deps": "./npm_package_rm_build_deps.sh",
+    "preinstall": "cd ../rust/gbt && npm run build-release && npm run to-backend",
     "start": "node --max-old-space-size=2048 dist/index.js",
     "start-production": "node --max-old-space-size=16384 dist/index.js",
     "reindex-updated-pools": "npm run start-production --update-pools",
@@ -34,33 +36,32 @@
     "test:ci": "CI=true ./node_modules/.bin/jest --coverage",
     "lint": "./node_modules/.bin/eslint . --ext .ts",
     "lint:fix": "./node_modules/.bin/eslint . --ext .ts --fix",
-    "prettier": "./node_modules/.bin/prettier --write \"src/**/*.{js,ts}\"",
-    "rust-build": "cd rust-gbt && npm run build-release"
+    "prettier": "./node_modules/.bin/prettier --write \"src/**/*.{js,ts}\""
   },
   "dependencies": {
-    "@babel/core": "^7.23.2",
+    "@babel/core": "^7.24.0",
     "@mempool/electrum-client": "1.1.9",
     "@types/node": "^18.15.3",
-    "axios": "~1.5.0",
+    "axios": "~1.6.1",
     "bitcoinjs-lib": "~6.1.3",
     "crypto-js": "~4.2.0",
-    "express": "~4.18.2",
+    "express": "~4.19.2",
     "maxmind": "~4.3.11",
-    "mysql2": "~3.6.0",
+    "mysql2": "~3.9.1",
     "rust-gbt": "file:./rust-gbt",
     "redis": "^4.6.6",
     "socks-proxy-agent": "~7.0.0",
     "typescript": "~4.9.3",
-    "ws": "~8.13.0"
+    "ws": "~8.16.0"
   },
   "devDependencies": {
     "@babel/code-frame": "^7.18.6",
-    "@babel/core": "^7.23.2",
+    "@babel/core": "^7.24.0",
     "@types/compression": "^1.7.2",
     "@types/crypto-js": "^4.1.1",
     "@types/express": "^4.17.17",
     "@types/jest": "^29.5.0",
-    "@types/ws": "~8.5.5",
+    "@types/ws": "~8.5.10",
     "@typescript-eslint/eslint-plugin": "^5.55.0",
     "@typescript-eslint/parser": "^5.55.0",
     "eslint": "^8.36.0",

backend/rust-gbt/index.d.ts

@@ -1,49 +0,0 @@
-/* tslint:disable */
-/* eslint-disable */
-
-/* auto-generated by NAPI-RS */
-
-export interface ThreadTransaction {
-  uid: number
-  order: number
-  fee: number
-  weight: number
-  sigops: number
-  effectiveFeePerVsize: number
-  inputs: Array<number>
-}
-export interface ThreadAcceleration {
-  uid: number
-  delta: number
-}
-export class GbtGenerator {
-  constructor()
-  /**
-   * # Errors
-   *
-   * Rejects if the thread panics or if the Mutex is poisoned.
-   */
-  make(mempool: Array<ThreadTransaction>, accelerations: Array<ThreadAcceleration>, maxUid: number): Promise<GbtResult>
-  /**
-   * # Errors
-   *
-   * Rejects if the thread panics or if the Mutex is poisoned.
-   */
-  update(newTxs: Array<ThreadTransaction>, removeTxs: Array<number>, accelerations: Array<ThreadAcceleration>, maxUid: number): Promise<GbtResult>
-}
-/**
- * The result from calling the gbt function.
- *
- * This tuple contains the following:
- *        blocks: A 2D Vector of transaction IDs (u32), the inner Vecs each represent a block.
- * block_weights: A Vector of total weights per block.
- *      clusters: A 2D Vector of transaction IDs representing clusters of dependent mempool transactions
- *         rates: A Vector of tuples containing transaction IDs (u32) and effective fee per vsize (f64)
- */
-export class GbtResult {
-  blocks: Array<Array<number>>
-  blockWeights: Array<number>
-  clusters: Array<Array<number>>
-  rates: Array<Array<number>>
-  constructor(blocks: Array<Array<number>>, blockWeights: Array<number>, clusters: Array<Array<number>>, rates: Array<Array<number>>)
-}

backend/rust-gbt/index.js

@@ -1,258 +0,0 @@
-/* tslint:disable */
-/* eslint-disable */
-/* prettier-ignore */
-
-/* auto-generated by NAPI-RS */
-
-const { existsSync, readFileSync } = require('fs')
-const { join } = require('path')
-
-const { platform, arch } = process
-
-let nativeBinding = null
-let localFileExisted = false
-let loadError = null
-
-function isMusl() {
-  // For Node 10
-  if (!process.report || typeof process.report.getReport !== 'function') {
-    try {
-      const lddPath = require('child_process').execSync('which ldd').toString().trim()
-      return readFileSync(lddPath, 'utf8').includes('musl')
-    } catch (e) {
-      return true
-    }
-  } else {
-    const { glibcVersionRuntime } = process.report.getReport().header
-    return !glibcVersionRuntime
-  }
-}
-
-switch (platform) {
-  case 'android':
-    switch (arch) {
-      case 'arm64':
-        localFileExisted = existsSync(join(__dirname, 'gbt.android-arm64.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./gbt.android-arm64.node')
-          } else {
-            nativeBinding = require('gbt-android-arm64')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      case 'arm':
-        localFileExisted = existsSync(join(__dirname, 'gbt.android-arm-eabi.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./gbt.android-arm-eabi.node')
-          } else {
-            nativeBinding = require('gbt-android-arm-eabi')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      default:
-        throw new Error(`Unsupported architecture on Android ${arch}`)
-    }
-    break
-  case 'win32':
-    switch (arch) {
-      case 'x64':
-        localFileExisted = existsSync(
-          join(__dirname, 'gbt.win32-x64-msvc.node')
-        )
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./gbt.win32-x64-msvc.node')
-          } else {
-            nativeBinding = require('gbt-win32-x64-msvc')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      case 'ia32':
-        localFileExisted = existsSync(
-          join(__dirname, 'gbt.win32-ia32-msvc.node')
-        )
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./gbt.win32-ia32-msvc.node')
-          } else {
-            nativeBinding = require('gbt-win32-ia32-msvc')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      case 'arm64':
-        localFileExisted = existsSync(
-          join(__dirname, 'gbt.win32-arm64-msvc.node')
-        )
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./gbt.win32-arm64-msvc.node')
-          } else {
-            nativeBinding = require('gbt-win32-arm64-msvc')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      default:
-        throw new Error(`Unsupported architecture on Windows: ${arch}`)
-    }
-    break
-  case 'darwin':
-    localFileExisted = existsSync(join(__dirname, 'gbt.darwin-universal.node'))
-    try {
-      if (localFileExisted) {
-        nativeBinding = require('./gbt.darwin-universal.node')
-      } else {
-        nativeBinding = require('gbt-darwin-universal')
-      }
-      break
-    } catch {}
-    switch (arch) {
-      case 'x64':
-        localFileExisted = existsSync(join(__dirname, 'gbt.darwin-x64.node'))
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./gbt.darwin-x64.node')
-          } else {
-            nativeBinding = require('gbt-darwin-x64')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      case 'arm64':
-        localFileExisted = existsSync(
-          join(__dirname, 'gbt.darwin-arm64.node')
-        )
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./gbt.darwin-arm64.node')
-          } else {
-            nativeBinding = require('gbt-darwin-arm64')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      default:
-        throw new Error(`Unsupported architecture on macOS: ${arch}`)
-    }
-    break
-  case 'freebsd':
-    if (arch !== 'x64') {
-      throw new Error(`Unsupported architecture on FreeBSD: ${arch}`)
-    }
-    localFileExisted = existsSync(join(__dirname, 'gbt.freebsd-x64.node'))
-    try {
-      if (localFileExisted) {
-        nativeBinding = require('./gbt.freebsd-x64.node')
-      } else {
-        nativeBinding = require('gbt-freebsd-x64')
-      }
-    } catch (e) {
-      loadError = e
-    }
-    break
-  case 'linux':
-    switch (arch) {
-      case 'x64':
-        if (isMusl()) {
-          localFileExisted = existsSync(
-            join(__dirname, 'gbt.linux-x64-musl.node')
-          )
-          try {
-            if (localFileExisted) {
-              nativeBinding = require('./gbt.linux-x64-musl.node')
-            } else {
-              nativeBinding = require('gbt-linux-x64-musl')
-            }
-          } catch (e) {
-            loadError = e
-          }
-        } else {
-          localFileExisted = existsSync(
-            join(__dirname, 'gbt.linux-x64-gnu.node')
-          )
-          try {
-            if (localFileExisted) {
-              nativeBinding = require('./gbt.linux-x64-gnu.node')
-            } else {
-              nativeBinding = require('gbt-linux-x64-gnu')
-            }
-          } catch (e) {
-            loadError = e
-          }
-        }
-        break
-      case 'arm64':
-        if (isMusl()) {
-          localFileExisted = existsSync(
-            join(__dirname, 'gbt.linux-arm64-musl.node')
-          )
-          try {
-            if (localFileExisted) {
-              nativeBinding = require('./gbt.linux-arm64-musl.node')
-            } else {
-              nativeBinding = require('gbt-linux-arm64-musl')
-            }
-          } catch (e) {
-            loadError = e
-          }
-        } else {
-          localFileExisted = existsSync(
-            join(__dirname, 'gbt.linux-arm64-gnu.node')
-          )
-          try {
-            if (localFileExisted) {
-              nativeBinding = require('./gbt.linux-arm64-gnu.node')
-            } else {
-              nativeBinding = require('gbt-linux-arm64-gnu')
-            }
-          } catch (e) {
-            loadError = e
-          }
-        }
-        break
-      case 'arm':
-        localFileExisted = existsSync(
-          join(__dirname, 'gbt.linux-arm-gnueabihf.node')
-        )
-        try {
-          if (localFileExisted) {
-            nativeBinding = require('./gbt.linux-arm-gnueabihf.node')
-          } else {
-            nativeBinding = require('gbt-linux-arm-gnueabihf')
-          }
-        } catch (e) {
-          loadError = e
-        }
-        break
-      default:
-        throw new Error(`Unsupported architecture on Linux: ${arch}`)
-    }
-    break
-  default:
-    throw new Error(`Unsupported OS: ${platform}, architecture: ${arch}`)
-}
-
-if (!nativeBinding) {
-  if (loadError) {
-    throw loadError
-  }
-  throw new Error(`Failed to load native binding`)
-}
-
-const { GbtGenerator, GbtResult } = nativeBinding
-
-module.exports.GbtGenerator = GbtGenerator
-module.exports.GbtResult = GbtResult

backend/rust-gbt/package-lock.json

@@ -1,34 +0,0 @@
-{
-  "name": "gbt",
-  "version": "3.0.0-dev",
-  "lockfileVersion": 3,
-  "requires": true,
-  "packages": {
-    "": {
-      "name": "gbt",
-      "version": "3.0.0-dev",
-      "hasInstallScript": true,
-      "dependencies": {
-        "@napi-rs/cli": "^2.16.1"
-      },
-      "engines": {
-        "node": ">= 12"
-      }
-    },
-    "node_modules/@napi-rs/cli": {
-      "version": "2.16.1",
-      "resolved": "https://registry.npmjs.org/@napi-rs/cli/-/cli-2.16.1.tgz",
-      "integrity": "sha512-L0Gr5iEQIDEbvWdDr1HUaBOxBSHL1VZhWSk1oryawoT8qJIY+KGfLFelU+Qma64ivCPbxYpkfPoKYVG3rcoGIA==",
-      "bin": {
-        "napi": "scripts/index.js"
-      },
-      "engines": {
-        "node": ">= 10"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      }
-    }
-  }
-}

backend/rust-gbt/package.json

@@ -1,33 +0,0 @@
-{
-  "name": "gbt",
-  "version": "3.0.0-dev",
-  "description": "An inefficient re-implementation of the getBlockTemplate algorithm in Rust",
-  "main": "index.js",
-  "types": "index.d.ts",
-  "scripts": {
-    "artifacts": "napi artifacts",
-    "build": "napi build --platform",
-    "build-debug": "npm run build",
-    "build-release": "npm run build -- --release --strip",
-    "install": "npm run build-release",
-    "prepublishOnly": "napi prepublish -t npm",
-    "test": "cargo test"
-  },
-  "author": "mononaut",
-  "napi": {
-    "name": "gbt",
-    "triples": {
-      "defaults": false,
-      "additional": [
-        "x86_64-unknown-linux-gnu",
-        "x86_64-unknown-freebsd"
-      ]
-    }
-  },
-  "dependencies": {
-    "@napi-rs/cli": "^2.16.1"
-  },
-  "engines": {
-    "node": ">= 12"
-  }
-}

backend/src/__fixtures__/mempool-config.template.json

@@ -1,9 +1,11 @@
 {
   "MEMPOOL": {
     "ENABLED": true,
+    "OFFICIAL": false,
     "NETWORK": "__MEMPOOL_NETWORK__",
     "BACKEND": "__MEMPOOL_BACKEND__",
     "BLOCKS_SUMMARIES_INDEXING": true,
+    "GOGGLES_INDEXING": false,
     "HTTP_PORT": 1,
     "SPAWN_CLUSTER_PROCS": 2,
     "API_URL_PREFIX": "__MEMPOOL_API_URL_PREFIX__",
@@ -26,22 +28,24 @@
     "POOLS_JSON_TREE_URL": "__MEMPOOL_POOLS_JSON_TREE_URL__",
     "POOLS_JSON_URL": "__MEMPOOL_POOLS_JSON_URL__",
     "AUDIT": true,
-    "ADVANCED_GBT_AUDIT": true,
-    "ADVANCED_GBT_MEMPOOL": true,
     "RUST_GBT": false,
+    "LIMIT_GBT": false,
     "CPFP_INDEXING": true,
     "MAX_BLOCKS_BULK_QUERY": 999,
     "DISK_CACHE_BLOCK_INTERVAL": 999,
     "MAX_PUSH_TX_SIZE_WEIGHT": 4000000,
     "ALLOW_UNREACHABLE": true,
-    "PRICE_UPDATES_PER_HOUR": 1
+    "PRICE_UPDATES_PER_HOUR": 1,
+    "MAX_TRACKED_ADDRESSES": 1
   },
   "CORE_RPC": {
     "HOST": "__CORE_RPC_HOST__",
     "PORT": 15,
     "USERNAME": "__CORE_RPC_USERNAME__",
     "PASSWORD": "__CORE_RPC_PASSWORD__",
-    "TIMEOUT": 1000
+    "TIMEOUT": 1000,
+    "COOKIE": false,
+    "COOKIE_PATH": "__CORE_RPC_COOKIE_PATH__"
   },
   "ELECTRUM": {
     "HOST": "__ELECTRUM_HOST__",
@@ -51,7 +55,10 @@
   "ESPLORA": {
     "REST_API_URL": "__ESPLORA_REST_API_URL__",
     "UNIX_SOCKET_PATH": "__ESPLORA_UNIX_SOCKET_PATH__",
+    "BATCH_QUERY_BASE_SIZE": 1000,
     "RETRY_UNIX_SOCKET_AFTER": 888,
+    "REQUEST_TIMEOUT": 10000,
+    "FALLBACK_TIMEOUT": 5000,
     "FALLBACK": []
   },
   "SECOND_CORE_RPC": {
@@ -59,7 +66,9 @@
     "PORT": 17,
     "USERNAME": "__SECOND_CORE_RPC_USERNAME__",
     "PASSWORD": "__SECOND_CORE_RPC_PASSWORD__",
-    "TIMEOUT": 2000
+    "TIMEOUT": 2000,
+    "COOKIE": false,
+    "COOKIE_PATH": "__SECOND_CORE_RPC_COOKIE_PATH__"
   },
   "DATABASE": {
     "ENABLED": false,
@@ -70,7 +79,8 @@
     "USERNAME": "__DATABASE_USERNAME__",
     "PASSWORD": "__DATABASE_PASSWORD__",
     "PID_DIR": "__DATABASE_PID_FILE__",
-    "TIMEOUT": 3000
+    "TIMEOUT": 3000,
+    "POOL_SIZE": 100
   },
   "SYSLOG": {
     "ENABLED": false,
@@ -83,10 +93,6 @@
     "ENABLED": false,
     "TX_PER_SECOND_SAMPLE_PERIOD": 20
   },
-  "BISQ": {
-    "ENABLED": true,
-    "DATA_PATH": "__BISQ_DATA_PATH__"
-  },
   "SOCKS5PROXY": {
     "ENABLED": true,
     "USE_ONION": true,
@@ -99,9 +105,7 @@
     "MEMPOOL_API": "__EXTERNAL_DATA_SERVER_MEMPOOL_API__",
     "MEMPOOL_ONION": "__EXTERNAL_DATA_SERVER_MEMPOOL_ONION__",
     "LIQUID_API": "__EXTERNAL_DATA_SERVER_LIQUID_API__",
-    "LIQUID_ONION": "__EXTERNAL_DATA_SERVER_LIQUID_ONION__",
-    "BISQ_URL": "__EXTERNAL_DATA_SERVER_BISQ_URL__",
-    "BISQ_ONION": "__EXTERNAL_DATA_SERVER_BISQ_ONION__"
+    "LIQUID_ONION": "__EXTERNAL_DATA_SERVER_LIQUID_ONION__"
   },
   "LIGHTNING": {
     "ENABLED": true,
@@ -134,6 +138,11 @@
   },
   "REDIS": {
     "ENABLED": false,
-    "UNIX_SOCKET_PATH": "/tmp/redis.sock"
+    "UNIX_SOCKET_PATH": "/tmp/redis.sock",
+    "BATCH_QUERY_BASE_SIZE": 5000
+  },
+  "FIAT_PRICE": {
+    "ENABLED": true,
+    "API_KEY": "__MEMPOOL_CURRENCY_API_KEY__"
   }
 }

backend/src/__tests__/api/difficulty-adjustment.test.ts

@@ -11,9 +11,35 @@ describe('Mempool Difficulty Adjustment', () => {
     };
 
     const vectors = [
-      [ // Vector 1
+      [ // Vector 1 (normal adjustment)
+        [ // Inputs
+          dt('2024-02-02T15:42:06.000Z'), // Last DA time (in seconds)
+          dt('2024-02-08T14:43:05.000Z'), // timestamp of 504 blocks ago (in seconds)
+          dt('2024-02-11T22:43:01.000Z'), // Current time (now) (in seconds)
+          830027,                         // Current block height
+          7.333505241141637,             // Previous retarget % (Passed through)
+          'mainnet',                      // Network (if testnet, next value is non-zero)
+          0,                              // Latest block timestamp in seconds (only used if difficulty already locked in)
+        ],
+        { // Expected Result
+          progressPercent: 71.97420634920636,
+          difficultyChange: 8.512745140778843,
+          estimatedRetargetDate: 1708004001715,
+          remainingBlocks: 565,
+          remainingTime: 312620715,
+          previousRetarget: 7.333505241141637,
+          previousTime: 1706888526,
+          nextRetargetHeight: 830592,
+          timeAvg: 553311,
+          adjustedTimeAvg: 553311,
+          timeOffset: 0,
+          expectedBlocks: 1338.0916666666667,
+        },
+      ],
+      [ // Vector 2 (within quarter-epoch overlap)
         [ // Inputs
           dt('2022-08-18T11:07:00.000Z'), // Last DA time (in seconds)
+          dt('2022-08-16T03:16:54.000Z'), // timestamp of 504 blocks ago (in seconds)
           dt('2022-08-19T14:03:53.000Z'), // Current time (now) (in seconds)
           750134,                         // Current block height
           0.6280047707459726,             // Previous retarget % (Passed through)
@@ -22,21 +48,23 @@ describe('Mempool Difficulty Adjustment', () => {
         ],
         { // Expected Result
           progressPercent: 9.027777777777777,
-          difficultyChange: 13.180707740199772,
-          estimatedRetargetDate: 1661895424692,
+          difficultyChange: 1.0420538959004633,
+          estimatedRetargetDate: 1662009048328,
           remainingBlocks: 1834,
-          remainingTime: 977591692,
+          remainingTime: 1091215328,
           previousRetarget: 0.6280047707459726,
           previousTime: 1660820820,
           nextRetargetHeight: 751968,
           timeAvg: 533038,
+          adjustedTimeAvg: 594992,
           timeOffset: 0,
           expectedBlocks: 161.68833333333333,
         },
       ],
-      [ // Vector 2 (testnet)
+      [ // Vector 3 (testnet)
         [ // Inputs
           dt('2022-08-18T11:07:00.000Z'), // Last DA time (in seconds)
+          dt('2022-08-16T03:16:54.000Z'), // timestamp of 504 blocks ago (in seconds)
           dt('2022-08-19T14:03:53.000Z'), // Current time (now) (in seconds)
           750134,                         // Current block height
           0.6280047707459726,             // Previous retarget % (Passed through)
@@ -45,22 +73,24 @@ describe('Mempool Difficulty Adjustment', () => {
         ],
         { // Expected Result is same other than timeOffset
           progressPercent: 9.027777777777777,
-          difficultyChange: 13.180707740199772,
-          estimatedRetargetDate: 1661895424692,
+          difficultyChange: 1.0420538959004633,
+          estimatedRetargetDate: 1662009048328,
           remainingBlocks: 1834,
-          remainingTime: 977591692,
+          remainingTime: 1091215328,
           previousTime: 1660820820,
           previousRetarget: 0.6280047707459726,
           nextRetargetHeight: 751968,
           timeAvg: 533038,
+          adjustedTimeAvg: 594992,
           timeOffset: -667000, // 11 min 7 seconds since last block (testnet only)
           // If we add time avg to abs(timeOffset) it makes exactly 1200000 ms, or 20 minutes
           expectedBlocks: 161.68833333333333,
         },
       ],
-      [ // Vector 3 (mainnet lock-in (epoch ending 788255))
+      [ // Vector 4 (mainnet lock-in (epoch ending 788255))
         [ // Inputs
           dt('2023-04-20T09:57:33.000Z'), // Last DA time (in seconds)
+          dt('2022-08-16T03:16:54.000Z'), // timestamp of 504 blocks ago (in seconds)
           dt('2023-05-04T14:54:09.000Z'), // Current time (now) (in seconds)
           788255,                         // Current block height
           1.7220298879531821,             // Previous retarget % (Passed through)
@@ -77,16 +107,17 @@ describe('Mempool Difficulty Adjustment', () => {
           previousTime: 1681984653,
           nextRetargetHeight: 788256,
           timeAvg: 609129,
+          adjustedTimeAvg: 609129,
           timeOffset: 0,
           expectedBlocks: 2045.66,
         },
       ],
-    ] as [[number, number, number, number, string, number], DifficultyAdjustment][];
+    ] as [[number, number, number, number, number, string, number], DifficultyAdjustment][];
 
     for (const vector of vectors) {
       const result = calcDifficultyAdjustment(...vector[0]);
       // previousRetarget is passed through untouched
-      expect(result.previousRetarget).toStrictEqual(vector[0][3]);
+      expect(result.previousRetarget).toStrictEqual(vector[0][4]);
       expect(result).toStrictEqual(vector[1]);
     }
   });

backend/src/__tests__/config.test.ts

@@ -14,9 +14,11 @@ describe('Mempool Backend Config', () => {
 
       expect(config.MEMPOOL).toStrictEqual({
         ENABLED: true,
+        OFFICIAL: false,
         NETWORK: 'mainnet',
         BACKEND: 'none',
         BLOCKS_SUMMARIES_INDEXING: false,
+        GOGGLES_INDEXING: false,
         HTTP_PORT: 8999,
         SPAWN_CLUSTER_PROCS: 0,
         API_URL_PREFIX: '/api/v1/',
@@ -39,15 +41,15 @@ describe('Mempool Backend Config', () => {
         POOLS_JSON_TREE_URL: 'https://api.github.com/repos/mempool/mining-pools/git/trees/master',
         POOLS_JSON_URL: 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json',
         AUDIT: false,
-        ADVANCED_GBT_AUDIT: false,
-        ADVANCED_GBT_MEMPOOL: false,
         RUST_GBT: false,
+        LIMIT_GBT: false,
         CPFP_INDEXING: false,
         MAX_BLOCKS_BULK_QUERY: 0,
         DISK_CACHE_BLOCK_INTERVAL: 6,
         MAX_PUSH_TX_SIZE_WEIGHT: 400000,
         ALLOW_UNREACHABLE: true,
         PRICE_UPDATES_PER_HOUR: 1,
+        MAX_TRACKED_ADDRESSES: 1,
       });
 
       expect(config.ELECTRUM).toStrictEqual({ HOST: '127.0.0.1', PORT: 3306, TLS_ENABLED: true });
@@ -55,7 +57,10 @@ describe('Mempool Backend Config', () => {
       expect(config.ESPLORA).toStrictEqual({
         REST_API_URL: 'http://127.0.0.1:3000',
         UNIX_SOCKET_PATH: null,
+        BATCH_QUERY_BASE_SIZE: 1000,
         RETRY_UNIX_SOCKET_AFTER: 30000,
+        REQUEST_TIMEOUT: 10000,
+        FALLBACK_TIMEOUT: 5000,
         FALLBACK: [],
        });
 
@@ -64,7 +69,9 @@ describe('Mempool Backend Config', () => {
         PORT: 8332,
         USERNAME: 'mempool',
         PASSWORD: 'mempool',
-        TIMEOUT: 60000
+        TIMEOUT: 60000,
+        COOKIE: false,
+        COOKIE_PATH: '/bitcoin/.cookie'
       });
 
       expect(config.SECOND_CORE_RPC).toStrictEqual({
@@ -72,7 +79,9 @@ describe('Mempool Backend Config', () => {
         PORT: 8332,
         USERNAME: 'mempool',
         PASSWORD: 'mempool',
-        TIMEOUT: 60000
+        TIMEOUT: 60000,
+        COOKIE: false,
+        COOKIE_PATH: '/bitcoin/.cookie'
       });
 
       expect(config.DATABASE).toStrictEqual({
@@ -84,7 +93,8 @@ describe('Mempool Backend Config', () => {
         USERNAME: 'mempool',
         PASSWORD: 'mempool',
         TIMEOUT: 180000,
-        PID_DIR: ''
+        PID_DIR: '',
+        POOL_SIZE: 100,
       });
 
       expect(config.SYSLOG).toStrictEqual({
@@ -97,8 +107,6 @@ describe('Mempool Backend Config', () => {
 
       expect(config.STATISTICS).toStrictEqual({ ENABLED: true, TX_PER_SECOND_SAMPLE_PERIOD: 150 });
 
-      expect(config.BISQ).toStrictEqual({ ENABLED: false, DATA_PATH: '/bisq/statsnode-data/btc_mainnet/db' });
-
       expect(config.SOCKS5PROXY).toStrictEqual({
         ENABLED: false,
         USE_ONION: true,
@@ -112,9 +120,7 @@ describe('Mempool Backend Config', () => {
         MEMPOOL_API: 'https://mempool.space/api/v1',
         MEMPOOL_ONION: 'http://mempoolhqx4isw62xs7abwphsq7ldayuidyx2v2oethdhhj6mlo2r6ad.onion/api/v1',
         LIQUID_API: 'https://liquid.network/api/v1',
-        LIQUID_ONION: 'http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1',
-        BISQ_URL: 'https://bisq.markets/api',
-        BISQ_ONION: 'http://bisqmktse2cabavbr2xjq7xw3h6g5ottemo5rolfcwt6aly6tp5fdryd.onion/api'
+        LIQUID_ONION: 'http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1'
       });
 
       expect(config.MAXMIND).toStrictEqual({
@@ -138,7 +144,13 @@ describe('Mempool Backend Config', () => {
 
       expect(config.REDIS).toStrictEqual({
         ENABLED: false,
-        UNIX_SOCKET_PATH: ''
+        UNIX_SOCKET_PATH: '',
+        BATCH_QUERY_BASE_SIZE: 5000,
+      });
+
+      expect(config.FIAT_PRICE).toStrictEqual({
+        ENABLED: true,
+        API_KEY: '',
       });
     });
   });
@@ -166,8 +178,6 @@ describe('Mempool Backend Config', () => {
 
       expect(config.STATISTICS).toStrictEqual(fixture.STATISTICS);
 
-      expect(config.BISQ).toStrictEqual(fixture.BISQ);
-
       expect(config.SOCKS5PROXY).toStrictEqual(fixture.SOCKS5PROXY);
 
       expect(config.EXTERNAL_DATA_SERVER).toStrictEqual(fixture.EXTERNAL_DATA_SERVER);

backend/src/api/about.routes.ts

@@ -0,0 +1,87 @@
+import { Application } from "express";
+import config from "../config";
+import axios from "axios";
+import logger from "../logger";
+
+class AboutRoutes {
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'donations', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/donations`, { responseType: 'stream', timeout: 10000 });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'donations/images/:id', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/donations/images/${req.params.id}`, {
+            responseType: 'stream', timeout: 10000
+          });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'contributors', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/contributors`, { responseType: 'stream', timeout: 10000 });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'contributors/images/:id', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/contributors/images/${req.params.id}`, {
+            responseType: 'stream', timeout: 10000
+          });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'translators', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/translators`, { responseType: 'stream', timeout: 10000 });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'translators/images/:id', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/translators/images/${req.params.id}`, {
+            responseType: 'stream', timeout: 10000
+          });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'services/sponsors', async (req, res) => {
+        const url = `${config.MEMPOOL_SERVICES.API}/${req.originalUrl.replace('/api/v1/services/', '')}`;
+        try {
+          const response = await axios.get(url, { responseType: 'stream', timeout: 10000 });
+          response.data.pipe(res);
+        } catch (e) {
+          logger.err(`Unable to fetch sponsors from ${url}. ${e}`, 'About Page');
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'services/account/images/:username', async (req, res) => {
+        const url = `${config.MEMPOOL_SERVICES.API}/${req.originalUrl.replace('/api/v1/services/', '')}`;
+        try {
+          const response = await axios.get(url, { responseType: 'stream', timeout: 10000 });
+          response.data.pipe(res);
+        } catch (e) {
+          logger.err(`Unable to fetch sponsor profile image from ${url}. ${e}`, 'About Page');
+          res.status(500).end();
+        }
+      })
+    ;
+  }
+}
+
+export default new AboutRoutes();

backend/src/api/acceleration/acceleration.routes.ts

@@ -0,0 +1,75 @@
+import { Application, Request, Response } from "express";
+import config from "../../config";
+import axios from "axios";
+import logger from "../../logger";
+
+class AccelerationRoutes {
+  private tag = 'Accelerator';
+
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'services/accelerator/accelerations', this.$getAcceleratorAccelerations.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'services/accelerator/accelerations/history', this.$getAcceleratorAccelerationsHistory.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'services/accelerator/accelerations/history/aggregated', this.$getAcceleratorAccelerationsHistoryAggregated.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'services/accelerator/accelerations/stats', this.$getAcceleratorAccelerationsStats.bind(this))
+    ;
+  }
+
+  private async $getAcceleratorAccelerations(req: Request, res: Response) {
+    const url = `${config.MEMPOOL_SERVICES.API}/${req.originalUrl.replace('/api/v1/services/', '')}`;
+    try {
+      const response = await axios.get(url, { responseType: 'stream', timeout: 10000 });
+      for (const key in response.headers) {
+        res.setHeader(key, response.headers[key]); 
+      }      
+      response.data.pipe(res);
+    } catch (e) {
+      logger.err(`Unable to get current accelerations from ${url} in $getAcceleratorAccelerations(), ${e}`, this.tag);
+      res.status(500).end();
+    }
+  }
+
+  private async $getAcceleratorAccelerationsHistory(req: Request, res: Response) {
+    const url = `${config.MEMPOOL_SERVICES.API}/${req.originalUrl.replace('/api/v1/services/', '')}`;
+    try {
+      const response = await axios.get(url, { responseType: 'stream', timeout: 10000 });
+      for (const key in response.headers) {
+        res.setHeader(key, response.headers[key]); 
+      }      
+      response.data.pipe(res);
+    } catch (e) {
+      logger.err(`Unable to get acceleration history from ${url} in $getAcceleratorAccelerationsHistory(), ${e}`, this.tag);
+      res.status(500).end();
+    }
+  }
+
+  private async $getAcceleratorAccelerationsHistoryAggregated(req: Request, res: Response) {
+    const url = `${config.MEMPOOL_SERVICES.API}/${req.originalUrl.replace('/api/v1/services/', '')}`;
+    try {
+      const response = await axios.get(url, { responseType: 'stream', timeout: 10000 });
+      for (const key in response.headers) {
+        res.setHeader(key, response.headers[key]); 
+      }      
+      response.data.pipe(res);
+    } catch (e) {
+      logger.err(`Unable to get aggregated acceleration history from ${url} in $getAcceleratorAccelerationsHistoryAggregated(), ${e}`, this.tag);
+      res.status(500).end();
+    }
+  }
+
+  private async $getAcceleratorAccelerationsStats(req: Request, res: Response) {
+    const url = `${config.MEMPOOL_SERVICES.API}/${req.originalUrl.replace('/api/v1/services/', '')}`;
+    try {
+      const response = await axios.get(url, { responseType: 'stream', timeout: 10000 });
+      for (const key in response.headers) {
+        res.setHeader(key, response.headers[key]); 
+      }      
+      response.data.pipe(res);
+    } catch (e) {
+      logger.err(`Unable to get acceleration stats from ${url} in $getAcceleratorAccelerationsStats(), ${e}`, this.tag);
+      res.status(500).end();
+    }
+  }
+}
+
+export default new AccelerationRoutes();

backend/src/api/acceleration/acceleration.ts

@@ -0,0 +1,738 @@
+import logger from '../../logger';
+import { MempoolTransactionExtended } from '../../mempool.interfaces';
+import { IEsploraApi } from '../bitcoin/esplora-api.interface';
+
+const BLOCK_WEIGHT_UNITS = 4_000_000;
+const BLOCK_SIGOPS = 80_000;
+const MAX_RELATIVE_GRAPH_SIZE = 200;
+const BID_BOOST_WINDOW = 40_000;
+const BID_BOOST_MIN_OFFSET = 10_000;
+const BID_BOOST_MAX_OFFSET = 400_000;
+
+type Acceleration = {
+  txid: string;
+  max_bid: number;
+};
+
+interface TxSummary {
+  txid: string; // txid of the current transaction
+  effectiveVsize: number; // Total vsize of the dependency tree
+  effectiveFee: number;  // Total fee of the dependency tree in sats
+  ancestorCount: number; // Number of ancestors
+}
+
+export interface AccelerationInfo {
+  txSummary: TxSummary;
+  targetFeeRate: number; // target fee rate (recommended next block fee, or median fee for mined block)
+  nextBlockFee: number; // fee in sats required to be in the next block (using recommended next block fee, or median fee for mined block)
+  cost: number; // additional cost to accelerate ((cost + txSummary.effectiveFee) / txSummary.effectiveVsize) >= targetFeeRate
+}
+
+interface GraphTx {
+  txid: string;
+  vsize: number;
+  weight: number;
+  fees: {
+    base: number; // in sats
+  };
+  depends: string[];
+  spentby: string[];
+}
+
+interface MempoolTx extends GraphTx {
+  ancestorcount: number;
+  ancestorsize: number;
+  fees: { // in sats
+    base: number;
+    ancestor: number;
+  };
+
+  ancestors: Map<string, MempoolTx>,
+  ancestorRate: number;
+  individualRate: number;
+  score: number;
+}
+
+class AccelerationCosts {
+  /**
+   * Takes a list of accelerations and verbose block data
+   * Returns the "fair" boost rate to charge accelerations
+   *
+   * @param accelerationsx
+   * @param verboseBlock
+   */
+  public calculateBoostRate(accelerations: Acceleration[], blockTxs: IEsploraApi.Transaction[]): number {
+    // Run GBT ourselves to calculate accurate effective fee rates
+    // the list of transactions comes from a mined block, so we already know everything fits within consensus limits
+    const template = makeBlockTemplate(blockTxs, accelerations, 1, Infinity, Infinity);
+
+    // initialize working maps for fast tx lookups
+    const accMap = {};
+    const txMap = {};
+    for (const acceleration of accelerations) {
+      accMap[acceleration.txid] = acceleration;
+    }
+    for (const tx of template) {
+      txMap[tx.txid] = tx;
+    }
+
+    // Identify and exclude accelerated and otherwise prioritized transactions
+    const excludeMap = {};
+    let totalWeight = 0;
+    let minAcceleratedPackage = Infinity;
+    let lastEffectiveRate = 0;
+    // Iterate over the mined template from bottom to top.
+    // Transactions should appear in ascending order of mining priority.
+    for (const blockTx of [...blockTxs].reverse()) {
+      const txid = blockTx.txid;
+      const tx = txMap[txid];
+      totalWeight += tx.weight;
+      const isAccelerated = accMap[txid] != null;
+      // If a cluster has a in-band effective fee rate than the previous cluster,
+      // it must have been prioritized out-of-band (in order to have a higher mining priority)
+      // so exclude from the analysis.
+      const isPrioritized = tx.effectiveFeePerVsize < lastEffectiveRate;
+      if (isPrioritized || isAccelerated) {
+        let packageWeight = 0;
+        // exclude this whole CPFP cluster
+        for (const clusterTxid of tx.cluster) {
+          packageWeight += txMap[clusterTxid].weight;
+          if (!excludeMap[clusterTxid]) {
+            excludeMap[clusterTxid] = true;
+          }
+        }
+        // keep track of the smallest accelerated CPFP cluster for later
+        if (isAccelerated) {
+          minAcceleratedPackage = Math.min(minAcceleratedPackage, packageWeight);
+        }
+      }
+      if (!isPrioritized) {
+        if (!isAccelerated) {
+          lastEffectiveRate = tx.effectiveFeePerVsize;
+        }
+      }
+    }
+
+    // The Bid Boost Rate is calculated by disregarding the bottom X weight units of the block,
+    // where X is the larger of BID_BOOST_MIN_OFFSET or the smallest accelerated package weight (the "offset"),
+    // then taking the average fee rate of the following BID_BOOST_WINDOW weight units
+    // (ignoring accelerated transactions and their ancestors).
+    //
+    // Transactions within the offset might pay less than the fair rate due to bin-packing effects
+    // But the average rate paid by the next chunk of non-accelerated transactions provides a good
+    // upper bound on the "next best rate" of alternatives to including the accelerated transactions
+    // (since, if there were any better options, they would have been included instead)
+    const spareWeight = BLOCK_WEIGHT_UNITS - totalWeight;
+    const windowOffset = Math.min(Math.max(minAcceleratedPackage, BID_BOOST_MIN_OFFSET, spareWeight), BID_BOOST_MAX_OFFSET);
+    const leftBound = windowOffset;
+    const rightBound = windowOffset + BID_BOOST_WINDOW;
+    let totalFeeInWindow = 0;
+    let totalWeightInWindow = Math.max(0, spareWeight - leftBound);
+    let txIndex = blockTxs.length - 1;
+    for (let offset = spareWeight; offset < BLOCK_WEIGHT_UNITS && txIndex >= 0; txIndex--) {
+      const txid = blockTxs[txIndex].txid;
+      const tx = txMap[txid];
+      if (excludeMap[txid]) {
+        // skip prioritized transactions and their ancestors
+        continue;
+      }
+
+      const left = offset;
+      const right = offset + tx.weight;
+      offset += tx.weight;
+      if (right < leftBound) {
+        // not within window yet
+        continue;
+      }
+      if (left > rightBound) {
+        // past window
+        break;
+      }
+      // count fees for weight units within the window
+      const overlapLeft = Math.max(leftBound, left);
+      const overlapRight = Math.min(rightBound, right);
+      const overlapUnits = overlapRight - overlapLeft;
+      totalFeeInWindow += (tx.effectiveFeePerVsize * (overlapUnits / 4));
+      totalWeightInWindow += overlapUnits;
+    }
+
+    if (totalWeightInWindow < BID_BOOST_WINDOW) {
+      // not enough un-prioritized transactions to calculate a fair rate
+      // just charge everyone their max bids
+      return Infinity;
+    }
+    // Divide the total fee by the size of the BID_BOOST_WINDOW in vbytes
+    const averageRate = totalFeeInWindow / (BID_BOOST_WINDOW / 4);
+    return averageRate;
+  }
+
+
+  /**
+   * Takes an accelerated mined txid and a target rate
+   * Returns the total vsize, fees and acceleration cost (in sats) of the tx and all same-block ancestors
+   * 
+   * @param txid 
+   * @param medianFeeRate 
+   */
+  public getAccelerationInfo(tx: MempoolTransactionExtended, targetFeeRate: number, transactions: MempoolTransactionExtended[]): AccelerationInfo {
+    // Get same-block transaction ancestors
+    const allRelatives = this.getSameBlockRelatives(tx, transactions);
+    const relativesMap = this.initializeRelatives(allRelatives);
+    const rootTx = relativesMap.get(tx.txid) as MempoolTx;
+
+    // Calculate cost to boost
+    return this.calculateAccelerationAncestors(rootTx, relativesMap, targetFeeRate);
+  }
+
+  /**
+   * Takes a raw transaction, and builds a graph of same-block relatives,
+   * and returns as a MempoolTx
+   * 
+   * @param tx 
+   */
+  private getSameBlockRelatives(tx: MempoolTransactionExtended, transactions: MempoolTransactionExtended[]): Map<string, GraphTx> {
+    const blockTxs = new Map<string, MempoolTransactionExtended>(); // map of txs in this block
+    const spendMap = new Map<string, string>(); // map of outpoints to spending txids
+    for (const tx of transactions) {
+      blockTxs.set(tx.txid, tx);
+      for (const vin of tx.vin) {
+        spendMap.set(`${vin.txid}:${vin.vout}`, tx.txid);
+      }
+    }
+
+    const relatives: Map<string, GraphTx> = new Map();
+    const stack: string[] = [tx.txid];
+
+    // build set of same-block ancestors
+    while (stack.length > 0) {
+      const nextTxid = stack.pop();
+      const nextTx = nextTxid ? blockTxs.get(nextTxid) : null;
+      if (!nextTx || relatives.has(nextTx.txid)) {
+        continue;
+      }
+
+      const mempoolTx = this.convertToGraphTx(nextTx);
+
+      mempoolTx.fees.base = nextTx.fee || 0;
+      mempoolTx.depends = nextTx.vin.map(vin => vin.txid).filter(inTxid => inTxid && blockTxs.has(inTxid)) as string[];
+      mempoolTx.spentby = nextTx.vout.map((vout, index) => spendMap.get(`${nextTx.txid}:${index}`)).filter(outTxid => outTxid && blockTxs.has(outTxid)) as string[];
+
+      for (const txid of [...mempoolTx.depends, ...mempoolTx.spentby]) {
+        if (txid) {
+          stack.push(txid);
+        }
+      }
+
+      relatives.set(mempoolTx.txid, mempoolTx);
+    }
+
+    return relatives;
+  }
+
+  /**
+   * Takes a raw transaction and converts it to MempoolTx format
+   * fee and ancestor data is initialized with dummy/null values
+   * 
+   * @param tx 
+   */
+  private convertToGraphTx(tx: MempoolTransactionExtended): GraphTx {
+    return {
+      txid: tx.txid,
+      vsize: Math.ceil(tx.weight / 4),
+      weight: tx.weight,
+      fees: {
+        base: 0, // dummy
+      },
+      depends: [], // dummy
+      spentby: [], //dummy
+    };
+  }
+
+  private convertGraphToMempoolTx(tx: GraphTx): MempoolTx {
+    return {
+      ...tx,
+      fees: {
+        base: tx.fees.base,
+        ancestor: tx.fees.base,
+      },
+      ancestorcount: 1,
+      ancestorsize: Math.ceil(tx.weight / 4),
+      ancestors: new Map<string, MempoolTx>(),
+      ancestorRate: 0,
+      individualRate: 0,
+      score: 0,
+    };
+  }
+
+  /**
+   * Given a root transaction, a list of in-mempool ancestors, and a target fee rate,
+   * Calculate the minimum set of transactions to fee-bump, their total vsize + fees
+   * 
+   * @param tx
+   * @param ancestors
+   */
+  private calculateAccelerationAncestors(tx: MempoolTx, relatives: Map<string, MempoolTx>, targetFeeRate: number): AccelerationInfo {
+    // add root tx to the ancestor map
+    relatives.set(tx.txid, tx);
+
+    // Check for high-sigop transactions (not supported)
+    relatives.forEach(entry => {
+      if (entry.vsize > Math.ceil(entry.weight / 4)) {
+        throw new Error(`high_sigop_tx`);
+      }
+    });
+
+    // Initialize individual & ancestor fee rates
+    relatives.forEach(entry => this.setAncestorScores(entry));
+
+    // Sort by descending ancestor score
+    let sortedRelatives = Array.from(relatives.values()).sort(this.mempoolComparator);
+
+    let includedInCluster: Map<string, MempoolTx> | null = null;
+
+    // While highest score >= targetFeeRate
+    let maxIterations = MAX_RELATIVE_GRAPH_SIZE;
+    while (sortedRelatives.length && sortedRelatives[0].score && sortedRelatives[0].score >= targetFeeRate && maxIterations > 0) {
+      maxIterations--;
+      // Grab the highest scoring entry
+      const best = sortedRelatives.shift();
+      if (best) {
+        const cluster = new Map<string, MempoolTx>(best.ancestors?.entries() || []);
+        if (best.ancestors.has(tx.txid)) {
+          includedInCluster = cluster;
+        }
+        cluster.set(best.txid, best);
+        // Remove this cluster (it already pays over the target rate, so doesn't need to be boosted)
+        // and update scores, ancestor totals and dependencies for the survivors
+        this.removeAncestors(cluster, relatives);
+
+        // re-sort
+        sortedRelatives = Array.from(relatives.values()).sort(this.mempoolComparator);
+      }
+    }
+
+    // sanity check for infinite loops / too many ancestors (should never happen)
+    if (maxIterations <= 0) {
+      logger.warn(`acceleration dependency calculation failed: calculateAccelerationAncestors loop exceeded ${MAX_RELATIVE_GRAPH_SIZE} iterations, unable to proceed`);
+      throw new Error('invalid_tx_dependencies');
+    }
+
+    let totalFee = tx.fees.ancestor;
+
+    // transaction is already CPFP-d above the target rate by some descendant
+    if (includedInCluster) {
+      let clusterSize = 0;
+      let clusterFee = 0;
+      includedInCluster.forEach(entry => {
+        clusterSize += entry.vsize;
+        clusterFee += entry.fees.base;
+      });
+      const clusterRate = clusterFee / clusterSize;
+      totalFee = Math.ceil(tx.ancestorsize * clusterRate);
+    }
+
+    // Whatever remains in the accelerated tx's dependencies needs to be boosted to the targetFeeRate
+    // Cost = (totalVsize * targetFeeRate) - totalFee
+    return {
+      txSummary: {
+        txid: tx.txid,
+        effectiveVsize: tx.ancestorsize,
+        effectiveFee: totalFee,
+        ancestorCount: tx.ancestorcount,
+      },
+      cost: Math.max(0, Math.ceil(tx.ancestorsize * targetFeeRate) - totalFee),
+      targetFeeRate,
+      nextBlockFee: Math.ceil(tx.ancestorsize * targetFeeRate),
+    };
+  }
+
+  /**
+   * Recursively traverses an in-mempool dependency graph, and sets a Map of in-mempool ancestors
+   * for each transaction.
+   * 
+   * @param tx 
+   * @param all 
+   */
+  private setAncestors(tx: MempoolTx, all: Map<string, MempoolTx>, visited: Map<string, Map<string, MempoolTx>>, depth: number = 0): Map<string, MempoolTx> {
+    // sanity check for infinite recursion / too many ancestors (should never happen)
+    if (depth >= 100) {
+      logger.warn('acceleration dependency calculation failed: setAncestors reached depth of 100, unable to proceed', `Accelerator`);
+      throw new Error('invalid_tx_dependencies');
+    }
+    
+    // initialize the ancestor map for this tx
+    tx.ancestors = new Map<string, MempoolTx>();
+    tx.depends.forEach(parentId => {
+      const parent = all.get(parentId);
+      if (parent) {
+        // add the parent
+        tx.ancestors?.set(parentId, parent);
+        // check for a cached copy of this parent's ancestors
+        let ancestors = visited.get(parent.txid);
+        if (!ancestors) {
+          // recursively fetch the parent's ancestors
+          ancestors = this.setAncestors(parent, all, visited, depth + 1);
+        }
+        // and add to this tx's map
+        ancestors.forEach((ancestor, ancestorId) => {
+          tx.ancestors?.set(ancestorId, ancestor);
+        });
+      }
+    });
+    visited.set(tx.txid, tx.ancestors);
+
+    return tx.ancestors;
+  }
+
+  /**
+   * Efficiently sets a Map of in-mempool ancestors for each member of an expanded relative graph
+   * by running setAncestors on each leaf, and caching intermediate results.
+   * then initializes ancestor data for each transaction
+   * 
+   * @param all 
+   */
+  private initializeRelatives(all: Map<string, GraphTx>): Map<string, MempoolTx> {
+    const mempoolTxs = new Map<string, MempoolTx>();
+    all.forEach(entry => {
+      mempoolTxs.set(entry.txid, this.convertGraphToMempoolTx(entry));
+    });
+    const visited: Map<string, Map<string, MempoolTx>> = new Map();
+    const leaves: MempoolTx[] = Array.from(mempoolTxs.values()).filter(entry => entry.spentby.length === 0);
+    for (const leaf of leaves) {
+      this.setAncestors(leaf, mempoolTxs, visited);
+    }
+    mempoolTxs.forEach(entry => {
+      entry.ancestors?.forEach(ancestor => {
+        entry.ancestorcount++;
+        entry.ancestorsize += ancestor.vsize;
+        entry.fees.ancestor += ancestor.fees.base;
+      });
+      this.setAncestorScores(entry);
+    });
+    return mempoolTxs;
+  }
+
+  /**
+   * Remove a cluster of transactions from an in-mempool dependency graph
+   * and update the survivors' scores and ancestors
+   * 
+   * @param cluster 
+   * @param ancestors 
+   */
+  private removeAncestors(cluster: Map<string, MempoolTx>, all: Map<string, MempoolTx>): void {
+    // remove
+    cluster.forEach(tx => {
+      all.delete(tx.txid);
+    });
+
+    // update survivors
+    all.forEach(tx => {
+      cluster.forEach(remove => {
+        if (tx.ancestors?.has(remove.txid)) {
+          // remove as dependency
+          tx.ancestors.delete(remove.txid);
+          tx.depends = tx.depends.filter(parent => parent !== remove.txid);
+          // update ancestor sizes and fees
+          tx.ancestorsize -= remove.vsize;
+          tx.fees.ancestor -= remove.fees.base;
+        }
+      });
+      // recalculate fee rates
+      this.setAncestorScores(tx);
+    });
+  }
+
+  /**
+   * Take a mempool transaction, and set the fee rates and ancestor score
+   * 
+   * @param tx 
+   */
+  private setAncestorScores(tx: MempoolTx): void {
+    tx.individualRate = tx.fees.base / tx.vsize;
+    tx.ancestorRate = tx.fees.ancestor / tx.ancestorsize;
+    tx.score = Math.min(tx.individualRate, tx.ancestorRate);
+  }
+
+  // Sort by descending score
+  private mempoolComparator(a, b): number {
+    return b.score - a.score;
+  }
+}
+
+export default new AccelerationCosts;
+
+interface TemplateTransaction {
+  txid: string;
+  order: number;
+  weight: number;
+  adjustedVsize: number; // sigop-adjusted vsize, rounded up to the nearest integer
+  sigops: number;
+  fee: number;
+  feeDelta: number;
+  ancestors: string[];
+  cluster: string[];
+  effectiveFeePerVsize: number;
+}
+
+interface MinerTransaction extends TemplateTransaction {
+  inputs: string[];
+  feePerVsize: number;
+  relativesSet: boolean;
+  ancestorMap: Map<string, MinerTransaction>;
+  children: Set<MinerTransaction>;
+  ancestorFee: number;
+  ancestorVsize: number;
+  ancestorSigops: number;
+  score: number;
+  used: boolean;
+  modified: boolean;
+  dependencyRate: number;
+}
+
+/*
+* Build a block using an approximation of the transaction selection algorithm from Bitcoin Core
+* (see BlockAssembler in https://github.com/bitcoin/bitcoin/blob/master/src/node/miner.cpp)
+*/
+export function makeBlockTemplate(candidates: IEsploraApi.Transaction[], accelerations: Acceleration[], maxBlocks: number = 8, weightLimit: number = BLOCK_WEIGHT_UNITS, sigopLimit: number = BLOCK_SIGOPS): TemplateTransaction[] {
+  const auditPool: Map<string, MinerTransaction> = new Map();
+  const mempoolArray: MinerTransaction[] = [];
+  
+  candidates.forEach(tx => {
+    // initializing everything up front helps V8 optimize property access later
+    const adjustedVsize = Math.ceil(Math.max(tx.weight / 4, 5 * (tx.sigops || 0)));
+    const feePerVsize = (tx.fee / adjustedVsize);
+    auditPool.set(tx.txid, {
+      txid: tx.txid,
+      order: txidToOrdering(tx.txid),
+      fee: tx.fee,
+      feeDelta: 0,
+      weight: tx.weight,
+      adjustedVsize,
+      feePerVsize: feePerVsize,
+      effectiveFeePerVsize: feePerVsize,
+      dependencyRate: feePerVsize,
+      sigops: tx.sigops || 0,
+      inputs: (tx.vin?.map(vin => vin.txid) || []) as string[],
+      relativesSet: false,
+      ancestors: [],
+      cluster: [],
+      ancestorMap: new Map<string, MinerTransaction>(),
+      children: new Set<MinerTransaction>(),
+      ancestorFee: 0,
+      ancestorVsize: 0,
+      ancestorSigops: 0,
+      score: 0,
+      used: false,
+      modified: false,
+    });
+    mempoolArray.push(auditPool.get(tx.txid) as MinerTransaction);
+  });
+
+  // set accelerated effective fee
+  for (const acceleration of accelerations) {
+    const tx = auditPool.get(acceleration.txid);
+    if (tx) {
+      tx.feeDelta = acceleration.max_bid;
+      tx.feePerVsize = ((tx.fee + tx.feeDelta) / tx.adjustedVsize);
+      tx.effectiveFeePerVsize = tx.feePerVsize;
+      tx.dependencyRate = tx.feePerVsize;
+    }
+  }
+
+  // Build relatives graph & calculate ancestor scores
+  for (const tx of mempoolArray) {
+    if (!tx.relativesSet) {
+      setRelatives(tx, auditPool);
+    }
+  }
+
+  // Sort by descending ancestor score
+  mempoolArray.sort(priorityComparator);
+
+  // Build blocks by greedily choosing the highest feerate package
+  // (i.e. the package rooted in the transaction with the best ancestor score)
+  const blocks: number[][] = [];
+  let blockWeight = 0;
+  let blockSigops = 0;
+  const transactions: MinerTransaction[] = [];
+  let modified: MinerTransaction[] = [];
+  const overflow: MinerTransaction[] = [];
+  let failures = 0;
+  while (mempoolArray.length || modified.length) {
+    // skip invalid transactions
+    while (mempoolArray[0].used || mempoolArray[0].modified) {
+      mempoolArray.shift();
+    }
+
+    // Select best next package
+    let nextTx;
+    const nextPoolTx = mempoolArray[0];
+    const nextModifiedTx = modified[0];
+    if (nextPoolTx && (!nextModifiedTx || (nextPoolTx.score || 0) > (nextModifiedTx.score || 0))) {
+      nextTx = nextPoolTx;
+      mempoolArray.shift();
+    } else {
+      modified.shift();
+      if (nextModifiedTx) {
+        nextTx = nextModifiedTx;
+      }
+    }
+
+    if (nextTx && !nextTx?.used) {
+      // Check if the package fits into this block
+      if (blocks.length >= (maxBlocks - 1) || ((blockWeight + (4 * nextTx.ancestorVsize) < weightLimit) && (blockSigops + nextTx.ancestorSigops <= sigopLimit))) {
+        const ancestors: MinerTransaction[] = Array.from(nextTx.ancestorMap.values());
+        // sort ancestors by dependency graph (equivalent to sorting by ascending ancestor count)
+        const sortedTxSet = [...ancestors.sort((a, b) => { return (a.ancestorMap.size || 0) - (b.ancestorMap.size || 0); }), nextTx];
+        const clusterTxids = sortedTxSet.map(tx => tx.txid);
+        const effectiveFeeRate = Math.min(nextTx.dependencyRate || Infinity, nextTx.ancestorFee / nextTx.ancestorVsize);
+        const used: MinerTransaction[] = [];
+        while (sortedTxSet.length) {
+          const ancestor = sortedTxSet.pop();
+          if (!ancestor) {
+            continue;
+          }
+          ancestor.used = true;
+          ancestor.usedBy = nextTx.txid;
+          // update this tx with effective fee rate & relatives data
+          if (ancestor.effectiveFeePerVsize !== effectiveFeeRate) {
+            ancestor.effectiveFeePerVsize = effectiveFeeRate;
+          }
+          ancestor.cluster = clusterTxids;
+          transactions.push(ancestor);
+          blockWeight += ancestor.weight;
+          blockSigops += ancestor.sigops;
+          used.push(ancestor);
+        }
+
+        // remove these as valid package ancestors for any descendants remaining in the mempool
+        if (used.length) {
+          used.forEach(tx => {
+            modified = updateDescendants(tx, auditPool, modified, effectiveFeeRate);
+          });
+        }
+
+        failures = 0;
+      } else {
+        // hold this package in an overflow list while we check for smaller options
+        overflow.push(nextTx);
+        failures++;
+      }
+    }
+
+    // this block is full
+    const exceededPackageTries = failures > 1000 && blockWeight > (weightLimit - 4000);
+    const queueEmpty = !mempoolArray.length && !modified.length;
+
+    if (exceededPackageTries || queueEmpty) {
+      break;
+    }
+  }
+
+  for (const tx of transactions) {
+    tx.ancestors = Object.values(tx.ancestorMap);
+  }
+
+  return transactions;
+}
+
+// traverse in-mempool ancestors
+// recursion unavoidable, but should be limited to depth < 25 by mempool policy
+function setRelatives(
+  tx: MinerTransaction,
+  mempool: Map<string, MinerTransaction>,
+): void {
+  for (const parent of tx.inputs) {
+    const parentTx = mempool.get(parent);
+    if (parentTx && !tx.ancestorMap?.has(parent)) {
+      tx.ancestorMap.set(parent, parentTx);
+      parentTx.children.add(tx);
+      // visit each node only once
+      if (!parentTx.relativesSet) {
+        setRelatives(parentTx, mempool);
+      }
+      parentTx.ancestorMap.forEach((ancestor) => {
+        tx.ancestorMap.set(ancestor.txid, ancestor);
+      });
+    }
+  };
+  tx.ancestorFee = (tx.fee + tx.feeDelta);
+  tx.ancestorVsize = tx.adjustedVsize || 0;
+  tx.ancestorSigops = tx.sigops || 0;
+  tx.ancestorMap.forEach((ancestor) => {
+    tx.ancestorFee += (ancestor.fee + ancestor.feeDelta);
+    tx.ancestorVsize += ancestor.adjustedVsize;
+    tx.ancestorSigops += ancestor.sigops;
+  });
+  tx.score = tx.ancestorFee / tx.ancestorVsize;
+  tx.relativesSet = true;
+}
+
+// iterate over remaining descendants, removing the root as a valid ancestor & updating the ancestor score
+// avoids recursion to limit call stack depth
+function updateDescendants(
+  rootTx: MinerTransaction,
+  mempool: Map<string, MinerTransaction>,
+  modified: MinerTransaction[],
+  clusterRate: number,
+): MinerTransaction[] {
+  const descendantSet: Set<MinerTransaction> = new Set();
+  // stack of nodes left to visit
+  const descendants: MinerTransaction[] = [];
+  let descendantTx: MinerTransaction | undefined;
+  rootTx.children.forEach(childTx => {
+    if (!descendantSet.has(childTx)) {
+      descendants.push(childTx);
+      descendantSet.add(childTx);
+    }
+  });
+  while (descendants.length) {
+    descendantTx = descendants.pop();
+    if (descendantTx && descendantTx.ancestorMap && descendantTx.ancestorMap.has(rootTx.txid)) {
+      // remove tx as ancestor
+      descendantTx.ancestorMap.delete(rootTx.txid);
+      descendantTx.ancestorFee -= (rootTx.fee + rootTx.feeDelta);
+      descendantTx.ancestorVsize -= rootTx.adjustedVsize;
+      descendantTx.ancestorSigops -= rootTx.sigops;
+      descendantTx.score = descendantTx.ancestorFee / descendantTx.ancestorVsize;
+      descendantTx.dependencyRate = descendantTx.dependencyRate ? Math.min(descendantTx.dependencyRate, clusterRate) : clusterRate;
+
+      if (!descendantTx.modified) {
+        descendantTx.modified = true;
+        modified.push(descendantTx);
+      }
+
+      // add this node's children to the stack
+      descendantTx.children.forEach(childTx => {
+        // visit each node only once
+        if (!descendantSet.has(childTx)) {
+          descendants.push(childTx);
+          descendantSet.add(childTx);
+        }
+      });
+    }
+  }
+  // return new, resorted modified list
+  return modified.sort(priorityComparator);
+}
+
+// Used to sort an array of MinerTransactions by descending ancestor score
+function priorityComparator(a: MinerTransaction, b: MinerTransaction): number {
+  if (b.score === a.score) {
+    // tie-break by txid for stability
+    return a.order - b.order;
+  } else {
+    return b.score - a.score;
+  }
+}
+
+// returns the most significant 4 bytes of the txid as an integer
+function txidToOrdering(txid: string): number {
+  return parseInt(
+    txid.substring(62, 64) +
+      txid.substring(60, 62) +
+      txid.substring(58, 60) +
+      txid.substring(56, 58),
+    16
+  );
+}

backend/src/api/audit.ts

@@ -7,13 +7,14 @@ const PROPAGATION_MARGIN = 180; // in seconds, time since a transaction is first
 
 class Audit {
   auditBlock(transactions: MempoolTransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: MempoolTransactionExtended }, useAccelerations: boolean = false)
-   : { censored: string[], added: string[], fresh: string[], sigop: string[], fullrbf: string[], accelerated: string[], score: number, similarity: number } {
+   : { censored: string[], added: string[], prioritized: string[], fresh: string[], sigop: string[], fullrbf: string[], accelerated: string[], score: number, similarity: number } {
     if (!projectedBlocks?.[0]?.transactionIds || !mempool) {
-      return { censored: [], added: [], fresh: [], sigop: [], fullrbf: [], accelerated: [], score: 0, similarity: 1 };
+      return { censored: [], added: [], prioritized: [], fresh: [], sigop: [], fullrbf: [], accelerated: [], score: 1, similarity: 1 };
     }
 
     const matches: string[] = []; // present in both mined block and template
     const added: string[] = []; // present in mined block, not in template
+    const prioritized: string[] = [] // present in the mined block, not in the template, but further down in the mempool
     const fresh: string[] = []; // missing, but firstSeen or lastBoosted within PROPAGATION_MARGIN
     const rbf: string[] = []; // either missing or present, and either part of a full-rbf replacement, or a conflict with the mined block
     const accelerated: string[] = []; // prioritized by the mempool accelerator
@@ -68,20 +69,27 @@ class Audit {
 
     // we can expect an honest miner to include 'displaced' transactions in place of recent arrivals and censored txs
     // these displaced transactions should occupy the first N weight units of the next projected block
-    let displacedWeightRemaining = displacedWeight;
+    let displacedWeightRemaining = displacedWeight + 4000;
     let index = 0;
     let lastFeeRate = Infinity;
     let failures = 0;
-    while (projectedBlocks[1] && index < projectedBlocks[1].transactionIds.length && failures < 500) {
-      const txid = projectedBlocks[1].transactionIds[index];
+    let blockIndex = 1;
+    while (projectedBlocks[blockIndex] && failures < 500) {
+      if (index >= projectedBlocks[blockIndex].transactionIds.length) {
+        index = 0;
+        blockIndex++;
+      }
+      const txid = projectedBlocks[blockIndex].transactionIds[index];
       const tx = mempool[txid];
       if (tx) {
         const fits = (tx.weight - displacedWeightRemaining) < 4000;
-        const feeMatches = tx.effectiveFeePerVsize >= lastFeeRate;
+        // 0.005 margin of error for any remaining vsize rounding issues
+        const feeMatches = tx.effectiveFeePerVsize >= (lastFeeRate - 0.005);
         if (fits || feeMatches) {
           isDisplaced[txid] = true;
           if (fits) {
-            lastFeeRate = Math.min(lastFeeRate, tx.effectiveFeePerVsize);
+            // (tx.effectiveFeePerVsize * tx.vsize) / Math.ceil(tx.vsize) attempts to correct for vsize rounding in the simple non-CPFP case
+            lastFeeRate = Math.min(lastFeeRate, (tx.effectiveFeePerVsize * tx.vsize) / Math.ceil(tx.vsize));
           }
           if (tx.firstSeen == null || (now - (tx?.firstSeen || 0)) > PROPAGATION_MARGIN) {
             displacedWeightRemaining -= tx.weight;
@@ -106,7 +114,11 @@ class Audit {
         if (rbfCache.has(tx.txid)) {
           rbf.push(tx.txid);
         } else if (!isDisplaced[tx.txid]) {
-          added.push(tx.txid);
+          if (mempool[tx.txid]) {
+            prioritized.push(tx.txid);
+          } else {
+            added.push(tx.txid);
+          }
         }
         overflowWeight += tx.weight;
       }
@@ -144,12 +156,18 @@ class Audit {
 
     const numCensored = Object.keys(isCensored).length;
     const numMatches = matches.length - 1; // adjust for coinbase tx
-    const score = numMatches > 0 ? (numMatches / (numMatches + numCensored)) : 0;
+    let score = 0;
+    if (numMatches <= 0 && numCensored <= 0) {
+      score = 1;
+    } else if (numMatches > 0) {
+      score = (numMatches / (numMatches + numCensored));
+    }
     const similarity = projectedWeight ? matchedWeight / projectedWeight : 1;
 
     return {
       censored: Object.keys(isCensored),
       added,
+      prioritized,
       fresh,
       sigop: [],
       fullrbf: rbf,

backend/src/api/backend-info.ts

@@ -9,8 +9,8 @@ class BackendInfo {
 
   constructor() {
     // This file is created by ./fetch-version.ts during building
-    const versionFile = path.join(__dirname, 'version.json')
-    var versionInfo;
+    const versionFile = path.join(__dirname, 'version.json');
+    let versionInfo;
     if (fs.existsSync(versionFile)) {
       versionInfo = JSON.parse(fs.readFileSync(versionFile).toString());
     } else {
@@ -24,7 +24,8 @@ class BackendInfo {
       hostname: os.hostname(),
       version: versionInfo.version,
       gitCommit: versionInfo.gitCommit,
-      lightning: config.LIGHTNING.ENABLED
+      lightning: config.LIGHTNING.ENABLED,
+      backend: config.MEMPOOL.BACKEND,
     };
   }
 
@@ -32,7 +33,7 @@ class BackendInfo {
     return this.backendInfo;
   }
 
-  public getShortCommitHash() {
+  public getShortCommitHash(): string {
     return this.backendInfo.gitCommit.slice(0, 7);
   }
 }

backend/src/api/bisq/bisq.routes.ts

@@ -1,381 +0,0 @@
-import { Application, Request, Response } from 'express';
-import config from '../../config';
-import { RequiredSpec } from '../../mempool.interfaces';
-import bisq from './bisq';
-import { MarketsApiError } from './interfaces';
-import marketsApi from './markets-api';
-
-class BisqRoutes {
-  public initRoutes(app: Application) {
-    app
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/stats', this.getBisqStats)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/tx/:txId', this.getBisqTransaction)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/block/:hash', this.getBisqBlock)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/blocks/tip/height', this.getBisqTip)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/blocks/:index/:length', this.getBisqBlocks)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/address/:address', this.getBisqAddress)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/txs/:index/:length', this.getBisqTransactions)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/currencies', this.getBisqMarketCurrencies.bind(this))
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/depth', this.getBisqMarketDepth.bind(this))
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/hloc', this.getBisqMarketHloc.bind(this))
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/markets', this.getBisqMarketMarkets.bind(this))
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/offers', this.getBisqMarketOffers.bind(this))
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/ticker', this.getBisqMarketTicker.bind(this))
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/trades', this.getBisqMarketTrades.bind(this))
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/volumes', this.getBisqMarketVolumes.bind(this))
-      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/volumes/7d', this.getBisqMarketVolumes7d.bind(this))
-    ;
-  }
-
-
-  private getBisqStats(req: Request, res: Response) {
-    const result = bisq.getStats();
-    res.json(result);
-  }
-
-  private getBisqTip(req: Request, res: Response) {
-    const result = bisq.getLatestBlockHeight();
-    res.type('text/plain');
-    res.send(result.toString());
-  }
-
-  private getBisqTransaction(req: Request, res: Response) {
-    const result = bisq.getTransaction(req.params.txId);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(404).send('Bisq transaction not found');
-    }
-  }
-
-  private getBisqTransactions(req: Request, res: Response) {
-    const types: string[] = [];
-    req.query.types = req.query.types || [];
-    if (!Array.isArray(req.query.types)) {
-      res.status(500).send('Types is not an array');
-      return;
-    }
-
-    for (const _type in req.query.types) {
-      if (typeof req.query.types[_type] === 'string') {
-        types.push(req.query.types[_type].toString());
-      }
-    }
-
-    const index = parseInt(req.params.index, 10) || 0;
-    const length = parseInt(req.params.length, 10) > 100 ? 100 : parseInt(req.params.length, 10) || 25;
-    const [transactions, count] = bisq.getTransactions(index, length, types);
-    res.header('X-Total-Count', count.toString());
-    res.json(transactions);
-  }
-
-  private getBisqBlock(req: Request, res: Response) {
-    const result = bisq.getBlock(req.params.hash);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(404).send('Bisq block not found');
-    }
-  }
-
-  private getBisqBlocks(req: Request, res: Response) {
-    const index = parseInt(req.params.index, 10) || 0;
-    const length = parseInt(req.params.length, 10) > 100 ? 100 : parseInt(req.params.length, 10) || 25;
-    const [transactions, count] = bisq.getBlocks(index, length);
-    res.header('X-Total-Count', count.toString());
-    res.json(transactions);
-  }
-
-  private getBisqAddress(req: Request, res: Response) {
-    const result = bisq.getAddress(req.params.address.substr(1));
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(404).send('Bisq address not found');
-    }
-  }
-
-  private getBisqMarketCurrencies(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'type': {
-        required: false,
-        types: ['crypto', 'fiat', 'all']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = marketsApi.getCurrencies(p.type);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketCurrencies error'));
-    }
-  }
-
-  private getBisqMarketDepth(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: true,
-        types: ['@string']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = marketsApi.getDepth(p.market);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketDepth error'));
-    }
-  }
-
-  private getBisqMarketMarkets(req: Request, res: Response) {
-    const result = marketsApi.getMarkets();
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketMarkets error'));
-    }
-  }
-
-  private getBisqMarketTrades(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: true,
-        types: ['@string']
-      },
-      'timestamp_from': {
-        required: false,
-        types: ['@number']
-      },
-      'timestamp_to': {
-        required: false,
-        types: ['@number']
-      },
-      'trade_id_to': {
-        required: false,
-        types: ['@string']
-      },
-      'trade_id_from': {
-        required: false,
-        types: ['@string']
-      },
-      'direction': {
-        required: false,
-        types: ['buy', 'sell']
-      },
-      'limit': {
-        required: false,
-        types: ['@number']
-      },
-      'sort': {
-        required: false,
-        types: ['asc', 'desc']
-      }
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = marketsApi.getTrades(p.market, p.timestamp_from,
-      p.timestamp_to, p.trade_id_from, p.trade_id_to, p.direction, p.limit, p.sort);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketTrades error'));
-    }
-  }
-
-  private getBisqMarketOffers(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: true,
-        types: ['@string']
-      },
-      'direction': {
-        required: false,
-        types: ['buy', 'sell']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = marketsApi.getOffers(p.market, p.direction);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketOffers error'));
-    }
-  }
-
-  private getBisqMarketVolumes(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: false,
-        types: ['@string']
-      },
-      'interval': {
-        required: false,
-        types: ['minute', 'half_hour', 'hour', 'half_day', 'day', 'week', 'month', 'year', 'auto']
-      },
-      'timestamp_from': {
-        required: false,
-        types: ['@number']
-      },
-      'timestamp_to': {
-        required: false,
-        types: ['@number']
-      },
-      'milliseconds': {
-        required: false,
-        types: ['@boolean']
-      },
-      'timestamp': {
-        required: false,
-        types: ['no', 'yes']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = marketsApi.getVolumes(p.market, p.timestamp_from, p.timestamp_to, p.interval, p.milliseconds, p.timestamp);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketVolumes error'));
-    }
-  }
-
-  private getBisqMarketHloc(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: true,
-        types: ['@string']
-      },
-      'interval': {
-        required: false,
-        types: ['minute', 'half_hour', 'hour', 'half_day', 'day', 'week', 'month', 'year', 'auto']
-      },
-      'timestamp_from': {
-        required: false,
-        types: ['@number']
-      },
-      'timestamp_to': {
-        required: false,
-        types: ['@number']
-      },
-      'milliseconds': {
-        required: false,
-        types: ['@boolean']
-      },
-      'timestamp': {
-        required: false,
-        types: ['no', 'yes']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = marketsApi.getHloc(p.market, p.interval, p.timestamp_from, p.timestamp_to, p.milliseconds, p.timestamp);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketHloc error'));
-    }
-  }
-
-  private getBisqMarketTicker(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: false,
-        types: ['@string']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = marketsApi.getTicker(p.market);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketTicker error'));
-    }
-  }
-
-  private getBisqMarketVolumes7d(req: Request, res: Response) {
-    const result = marketsApi.getVolumesByTime(604800);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketVolumes7d error'));
-    }
-  }
-
-  private parseRequestParameters(requestParams: object, params: RequiredSpec): { [name: string]: any; } {
-    const final = {};
-    for (const i in params) {
-      if (params.hasOwnProperty(i)) {
-        if (params[i].required && requestParams[i] === undefined) {
-          return { error: i + ' parameter missing'};
-        }
-        if (typeof requestParams[i] === 'string') {
-          const str = (requestParams[i] || '').toString().toLowerCase();
-          if (params[i].types.indexOf('@number') > -1) {
-            const number = parseInt((str).toString(), 10);
-            final[i] = number;
-          } else if (params[i].types.indexOf('@string') > -1) {
-            final[i] = str;
-          } else if (params[i].types.indexOf('@boolean') > -1) {
-            final[i] = str === 'true' || str === 'yes';
-          } else if (params[i].types.indexOf(str) > -1) {
-            final[i] = str;
-          } else {
-            return { error: i + ' parameter invalid'};
-          }
-        } else if (typeof requestParams[i] === 'number') {
-          final[i] = requestParams[i];
-        }
-      }
-    }
-    return final;
-  }
-
-  private getBisqMarketErrorResponse(message: string): MarketsApiError {
-    return {
-      'success': 0,
-      'error': message
-    };
-  }
-
-}
-
-export default new BisqRoutes;

backend/src/api/bisq/bisq.ts

@@ -1,359 +0,0 @@
-import config from '../../config';
-import * as fs from 'fs';
-import axios, { AxiosResponse } from 'axios';
-import * as http from 'http';
-import * as https from 'https';
-import { SocksProxyAgent } from 'socks-proxy-agent';
-import { BisqBlocks, BisqBlock, BisqTransaction, BisqStats, BisqTrade } from './interfaces';
-import { Common } from '../common';
-import { BlockExtended } from '../../mempool.interfaces';
-import backendInfo from '../backend-info';
-import logger from '../../logger';
-
-class Bisq {
-  private static BLOCKS_JSON_FILE_PATH = config.BISQ.DATA_PATH + '/json/all/blocks.json';
-  private latestBlockHeight = 0;
-  private blocks: BisqBlock[] = [];
-  private allBlocks: BisqBlock[] = [];
-  private transactions: BisqTransaction[] = [];
-  private transactionIndex: { [txId: string]: BisqTransaction } = {};
-  private blockIndex: { [hash: string]: BisqBlock } = {};
-  private addressIndex: { [address: string]: BisqTransaction[] } = {};
-  private stats: BisqStats = {
-    minted: 0,
-    burnt: 0,
-    addresses: 0,
-    unspent_txos: 0,
-    spent_txos: 0,
-  };
-  private price: number = 0;
-  private priceUpdateCallbackFunction: ((price: number) => void) | undefined;
-  private topDirectoryWatcher: fs.FSWatcher | undefined;
-  private subdirectoryWatcher: fs.FSWatcher | undefined;
-
-  constructor() {}
-
-  startBisqService(): void {
-    try {
-      this.checkForBisqDataFolder();
-    } catch (e) {
-      logger.info('Retrying to start bisq service in 3 minutes');
-      setTimeout(this.startBisqService.bind(this), 180000);
-      return;
-    }
-    this.loadBisqDumpFile();
-    setInterval(this.updatePrice.bind(this), 1000 * 60 * 60);
-    this.updatePrice();
-    this.startTopDirectoryWatcher();
-    this.startSubDirectoryWatcher();
-  }
-
-  handleNewBitcoinBlock(block: BlockExtended): void {
-    if (block.height - 10 > this.latestBlockHeight && this.latestBlockHeight !== 0) {
-      logger.warn(`Bitcoin block height (#${block.height}) has diverged from the latest Bisq block height (#${this.latestBlockHeight}). Restarting watchers...`);
-      this.startTopDirectoryWatcher();
-      this.startSubDirectoryWatcher();
-    }
-  }
-
-  getTransaction(txId: string): BisqTransaction | undefined {
-    return this.transactionIndex[txId];
-  }
-
-  getTransactions(start: number, length: number, types: string[]): [BisqTransaction[], number] {
-    let transactions = this.transactions;
-    if (types.length) {
-      transactions = transactions.filter((tx) => types.indexOf(tx.txType) > -1);
-    }
-    return [transactions.slice(start, length + start), transactions.length];
-  }
-
-  getBlock(hash: string): BisqBlock | undefined {
-    return this.blockIndex[hash];
-  }
-
-  getAddress(hash: string): BisqTransaction[] {
-    return this.addressIndex[hash];
-  }
-
-  getBlocks(start: number, length: number): [BisqBlock[], number] {
-    return [this.blocks.slice(start, length + start), this.blocks.length];
-  }
-
-  getStats(): BisqStats {
-    return this.stats;
-  }
-
-  setPriceCallbackFunction(fn: (price: number) => void) {
-    this.priceUpdateCallbackFunction = fn;
-  }
-
-  getLatestBlockHeight(): number {
-    return this.latestBlockHeight;
-  }
-
-  private checkForBisqDataFolder() {
-    if (!fs.existsSync(Bisq.BLOCKS_JSON_FILE_PATH)) {
-      logger.warn(Bisq.BLOCKS_JSON_FILE_PATH + ` doesn't exist. Make sure Bisq is running and the config is correct before starting the server.`);
-      throw new Error(`Cannot load BISQ ${Bisq.BLOCKS_JSON_FILE_PATH} file`);
-    }
-  }
-
-  private startTopDirectoryWatcher() {
-    if (this.topDirectoryWatcher) {
-      this.topDirectoryWatcher.close();
-    }
-    let fsWait: NodeJS.Timeout | null = null;
-    this.topDirectoryWatcher = fs.watch(config.BISQ.DATA_PATH + '/json', () => {
-      if (fsWait) {
-        clearTimeout(fsWait);
-      }
-      if (this.subdirectoryWatcher) {
-        this.subdirectoryWatcher.close();
-      }
-      fsWait = setTimeout(() => {
-        logger.debug(`Bisq restart detected. Resetting both watchers in 3 minutes.`);
-        setTimeout(() => {
-          this.startTopDirectoryWatcher();
-          this.startSubDirectoryWatcher();
-          this.loadBisqDumpFile();
-        }, 180000);
-      }, 15000);
-    });
-  }
-
-  private startSubDirectoryWatcher() {
-    if (this.subdirectoryWatcher) {
-      this.subdirectoryWatcher.close();
-    }
-    if (!fs.existsSync(Bisq.BLOCKS_JSON_FILE_PATH)) {
-      logger.warn(Bisq.BLOCKS_JSON_FILE_PATH + ` doesn't exist. Trying to restart sub directory watcher again in 3 minutes.`);
-      setTimeout(() => this.startSubDirectoryWatcher(), 180000);
-      return;
-    }
-    let fsWait: NodeJS.Timeout | null = null;
-    this.subdirectoryWatcher = fs.watch(config.BISQ.DATA_PATH + '/json/all', () => {
-      if (fsWait) {
-        clearTimeout(fsWait);
-      }
-      fsWait = setTimeout(() => {
-        logger.debug(`Change detected in the Bisq data folder.`);
-        this.loadBisqDumpFile();
-      }, 2000);
-    });
-  }
-  private async updatePrice() {
-    type axiosOptions = {
-      headers: {
-        'User-Agent': string
-      };
-      timeout: number;
-      httpAgent?: http.Agent;
-      httpsAgent?: https.Agent;
-    }
-    const setDelay = (secs: number = 1): Promise<void> => new Promise(resolve => setTimeout(() => resolve(), secs * 1000));
-    const BISQ_URL = (config.SOCKS5PROXY.ENABLED === true) && (config.SOCKS5PROXY.USE_ONION === true) ? config.EXTERNAL_DATA_SERVER.BISQ_ONION : config.EXTERNAL_DATA_SERVER.BISQ_URL;
-    const isHTTP = (new URL(BISQ_URL).protocol.split(':')[0] === 'http') ? true : false;
-    const axiosOptions: axiosOptions = {
-      headers: {
-        'User-Agent': (config.MEMPOOL.USER_AGENT === 'mempool') ? `mempool/v${backendInfo.getBackendInfo().version}` : `${config.MEMPOOL.USER_AGENT}`
-      },
-      timeout: config.SOCKS5PROXY.ENABLED ? 30000 : 10000
-    };
-    let retry = 0;
-
-    while(retry < config.MEMPOOL.EXTERNAL_MAX_RETRY) {
-      try {
-        if (config.SOCKS5PROXY.ENABLED) {
-          const socksOptions: any = {
-            agentOptions: {
-              keepAlive: true,
-            },
-            hostname: config.SOCKS5PROXY.HOST,
-            port: config.SOCKS5PROXY.PORT
-          };
-
-          if (config.SOCKS5PROXY.USERNAME && config.SOCKS5PROXY.PASSWORD) {
-            socksOptions.username = config.SOCKS5PROXY.USERNAME;
-            socksOptions.password = config.SOCKS5PROXY.PASSWORD;
-          } else {
-            // Retry with different tor circuits https://stackoverflow.com/a/64960234
-            socksOptions.username = `circuit${retry}`;
-          }
-
-          // Handle proxy agent for onion addresses
-          if (isHTTP) {
-            axiosOptions.httpAgent = new SocksProxyAgent(socksOptions);
-          } else {
-            axiosOptions.httpsAgent = new SocksProxyAgent(socksOptions);
-          }
-        }
-        
-        const data: AxiosResponse = await axios.get(`${BISQ_URL}/trades/?market=bsq_btc`, axiosOptions);
-        if (data.statusText === 'error' || !data.data) {
-          throw new Error(`Could not fetch data from Bisq market, Error: ${data.status}`);
-        }
-        const prices: number[] = [];
-        data.data.forEach((trade) => {
-          prices.push(parseFloat(trade.price) * 100000000);
-        });
-        prices.sort((a, b) => a - b);
-        this.price = Common.median(prices);
-        if (this.priceUpdateCallbackFunction) {
-          this.priceUpdateCallbackFunction(this.price);
-        }
-        logger.debug('Successfully updated Bisq market price');
-        break;
-      } catch (e) {
-        logger.err('Error updating Bisq market price: '  + (e instanceof Error ? e.message : e));
-        await setDelay(config.MEMPOOL.EXTERNAL_RETRY_INTERVAL);
-        retry++;
-      }
-    }
-  }
-
-  private async loadBisqDumpFile(): Promise<void> {
-    this.allBlocks = [];
-    try {
-      await this.loadData();
-      this.buildIndex();
-      this.calculateStats();
-    } catch (e) {
-      logger.info('Cannot load bisq dump file because: ' + (e instanceof Error ? e.message : e));
-    }
-  }
-
-  private buildIndex() {
-    const start = new Date().getTime();
-    this.transactions = [];
-    this.transactionIndex = {};
-    this.addressIndex = {};
-
-    this.allBlocks.forEach((block) => {
-      /* Build block index */
-      if (!this.blockIndex[block.hash]) {
-        this.blockIndex[block.hash] = block;
-      }
-
-      /* Build transactions index */
-      block.txs.forEach((tx) => {
-        this.transactions.push(tx);
-        this.transactionIndex[tx.id] = tx;
-      });
-    });
-
-    /* Build address index */
-    this.transactions.forEach((tx) => {
-      tx.inputs.forEach((input) => {
-        if (!this.addressIndex[input.address]) {
-          this.addressIndex[input.address] = [];
-        }
-        if (this.addressIndex[input.address].indexOf(tx) === -1) {
-          this.addressIndex[input.address].push(tx);
-        }
-      });
-      tx.outputs.forEach((output) => {
-        if (!this.addressIndex[output.address]) {
-          this.addressIndex[output.address] = [];
-        }
-        if (this.addressIndex[output.address].indexOf(tx) === -1) {
-          this.addressIndex[output.address].push(tx);
-        }
-      });
-    });
-
-    const time = new Date().getTime() - start;
-    logger.debug('Bisq data index rebuilt in ' + time + ' ms');
-  }
-
-  private calculateStats() {
-    let minted = 0;
-    let burned = 0;
-    let unspent = 0;
-    let spent = 0;
-
-    this.transactions.forEach((tx) => {
-      tx.outputs.forEach((output) => {
-        if (output.opReturn) {
-          return;
-        }
-        if (output.txOutputType === 'GENESIS_OUTPUT' || output.txOutputType === 'ISSUANCE_CANDIDATE_OUTPUT' && output.isVerified) {
-          minted += output.bsqAmount;
-        }
-        if (output.isUnspent) {
-          unspent++;
-        } else {
-          spent++;
-        }
-      });
-      burned += tx['burntFee'];
-    });
-
-    this.stats = {
-      addresses: Object.keys(this.addressIndex).length,
-      minted: minted / 100,
-      burnt: burned / 100,
-      spent_txos: spent,
-      unspent_txos: unspent,
-    };
-  }
-
-  private async loadData(): Promise<any> {
-    if (!fs.existsSync(Bisq.BLOCKS_JSON_FILE_PATH)) {
-      throw new Error(Bisq.BLOCKS_JSON_FILE_PATH + ` doesn't exist`);
-    }
-
-    const readline = require('readline');
-    const events = require('events');
-
-    const rl = readline.createInterface({
-      input: fs.createReadStream(Bisq.BLOCKS_JSON_FILE_PATH),
-      crlfDelay: Infinity
-    });
-
-    let blockBuffer = '';
-    let readingBlock = false;
-    let lineCount = 1;
-    const start = new Date().getTime();
-
-    logger.debug('Processing Bisq data dump...');
-
-    rl.on('line', (line) => {
-      if (lineCount === 2) {
-        line = line.replace('  "chainHeight": ', '');
-        this.latestBlockHeight = parseInt(line, 10);
-      }
-
-      if (line === '    {') {
-        readingBlock = true;
-      } else if (line === '    },') {
-        blockBuffer += '}';
-        try {
-          const block: BisqBlock =  JSON.parse(blockBuffer);
-          this.allBlocks.push(block);
-          readingBlock = false;
-          blockBuffer = '';
-        } catch (e) {
-          logger.debug(blockBuffer);
-          throw Error(`Unable to parse Bisq data dump at line ${lineCount}` + (e instanceof Error ? e.message : e));
-        }
-      }
-
-      if (readingBlock === true) {
-        blockBuffer += line;
-      }
-
-      ++lineCount;
-    });
-
-    await events.once(rl, 'close');
-
-    this.allBlocks.reverse();
-    this.blocks = this.allBlocks.filter((block) => block.txs.length > 0);
-
-    const time = new Date().getTime() - start;
-    logger.debug('Bisq dump processed in ' + time + ' ms');
-  }
-}
-
-export default new Bisq();

backend/src/api/bisq/interfaces.ts

@@ -1,258 +0,0 @@
-
-export interface BisqBlocks {
-  chainHeight: number;
-  blocks: BisqBlock[];
-}
-
-export interface BisqBlock {
-  height: number;
-  time: number;
-  hash: string;
-  previousBlockHash: string;
-  txs: BisqTransaction[];
-}
-
-export interface BisqTransaction {
-  txVersion: string;
-  id: string;
-  blockHeight: number;
-  blockHash: string;
-  time: number;
-  inputs: BisqInput[];
-  outputs: BisqOutput[];
-  txType: string;
-  txTypeDisplayString: string;
-  burntFee: number;
-  invalidatedBsq: number;
-  unlockBlockHeight: number;
-}
-
-export interface BisqStats {
-  minted: number;
-  burnt: number;
-  addresses: number;
-  unspent_txos: number;
-  spent_txos: number;
-}
-
-interface BisqInput {
-  spendingTxOutputIndex: number;
-  spendingTxId: string;
-  bsqAmount: number;
-  isVerified: boolean;
-  address: string;
-  time: number;
-}
-
-interface BisqOutput {
-  txVersion: string;
-  txId: string;
-  index: number;
-  bsqAmount: number;
-  btcAmount: number;
-  height: number;
-  isVerified: boolean;
-  burntFee: number;
-  invalidatedBsq: number;
-  address: string;
-  scriptPubKey: BisqScriptPubKey;
-  time: any;
-  txType: string;
-  txTypeDisplayString: string;
-  txOutputType: string;
-  txOutputTypeDisplayString: string;
-  lockTime: number;
-  isUnspent: boolean;
-  spentInfo: SpentInfo;
-  opReturn?: string;
-}
-
-interface BisqScriptPubKey {
-  addresses: string[];
-  asm: string;
-  hex: string;
-  reqSigs?: number;
-  type: string;
-}
-
-interface SpentInfo {
-  height: number;
-  inputIndex: number;
-  txId: string;
-}
-
-export interface BisqTrade {
-  direction: string;
-  price: string;
-  amount: string;
-  volume: string;
-  payment_method: string;
-  trade_id: string;
-  trade_date: number;
-  market?: string;
-}
-
-export interface Currencies { [txid: string]: Currency; }
-
-export interface Currency {
-  code: string;
-  name: string;
-  precision: number;
-
-  _type: string;
-}
-
-export interface Depth { [market: string]: Market; }
-
-interface Market {
-  'buys': string[];
-  'sells': string[];
-}
-
-export interface HighLowOpenClose {
-  period_start: number | string;
-  open: string;
-  high: string;
-  low: string;
-  close: string;
-  volume_left: string;
-  volume_right: string;
-  avg: string;
-}
-
-export interface Markets { [txid: string]: Pair; }
-
-interface Pair {
-  pair: string;
-  lname: string;
-  rname: string;
-  lsymbol: string;
-  rsymbol: string;
-  lprecision: number;
-  rprecision: number;
-  ltype: string;
-  rtype: string;
-  name: string;
-}
-
-export interface Offers { [market: string]: OffersMarket; }
-
-interface OffersMarket {
-  buys: Offer[] | null;
-  sells: Offer[] | null;
-}
-
-export interface OffersData {
-  direction: string;
-  currencyCode: string;
-  minAmount: number;
-  amount: number;
-  price: number;
-  date: number;
-  useMarketBasedPrice: boolean;
-  marketPriceMargin: number;
-  paymentMethod: string;
-  id: string;
-  currencyPair: string;
-  primaryMarketDirection: string;
-  priceDisplayString: string;
-  primaryMarketAmountDisplayString: string;
-  primaryMarketMinAmountDisplayString: string;
-  primaryMarketVolumeDisplayString: string;
-  primaryMarketMinVolumeDisplayString: string;
-  primaryMarketPrice: number;
-  primaryMarketAmount: number;
-  primaryMarketMinAmount: number;
-  primaryMarketVolume: number;
-  primaryMarketMinVolume: number;
-}
-
-export interface Offer {
-  offer_id: string;
-  offer_date: number;
-  direction: string;
-  min_amount: string;
-  amount: string;
-  price: string;
-  volume: string;
-  payment_method: string;
-  offer_fee_txid: any;
-}
-
-export interface Tickers { [market: string]: Ticker | null; }
-
-export interface Ticker {
-  last: string;
-  high: string;
-  low: string;
-  volume_left: string;
-  volume_right: string;
-  buy: string | null;
-  sell: string | null;
-}
-
-export interface Trade {
-  direction: string;
-  price: string;
-  amount: string;
-  volume: string;
-  payment_method: string;
-  trade_id: string;
-  trade_date: number;
-}
-
-export interface TradesData {
-  currency: string;
-  direction: string;
-  tradePrice: number;
-  tradeAmount: number;
-  tradeDate: number;
-  paymentMethod: string;
-  offerDate: number;
-  useMarketBasedPrice: boolean;
-  marketPriceMargin: number;
-  offerAmount: number;
-  offerMinAmount: number;
-  offerId: string;
-  depositTxId?: string;
-  currencyPair: string;
-  primaryMarketDirection: string;
-  primaryMarketTradePrice: number;
-  primaryMarketTradeAmount: number;
-  primaryMarketTradeVolume: number;
-
-  _market: string;
-  _tradePriceStr: string;
-  _tradeAmountStr: string;
-  _tradeVolumeStr: string;
-  _offerAmountStr: string;
-  _tradePrice: number;
-  _tradeAmount: number;
-  _tradeVolume: number;
-  _offerAmount: number;
-}
-
-export interface MarketVolume {
-  period_start: number;
-  num_trades: number;
-  volume: string;
-}
-
-export interface MarketsApiError {
-  success: number;
-  error: string;
-}
-
-export type Interval = 'minute' | 'half_hour' | 'hour' | 'half_day' | 'day' | 'week' | 'month' | 'year' | 'auto';
-
-export interface SummarizedIntervals { [market: string]: SummarizedInterval; }
-export interface SummarizedInterval {
-  'period_start': number;
-  'open': number;
-  'close': number;
-  'high': number;
-  'low': number;
-  'avg': number;
-  'volume_right': number;
-  'volume_left': number;
-}

backend/src/api/bisq/markets-api.ts

@@ -1,679 +0,0 @@
-import { Currencies, OffersData, TradesData, Depth, Currency, Interval, HighLowOpenClose,
-  Markets, Offers, Offer, BisqTrade, MarketVolume, Tickers, Ticker, SummarizedIntervals, SummarizedInterval } from './interfaces';
-
-const strtotime = require('./strtotime');
-
-class BisqMarketsApi {
-  private cryptoCurrencyData: Currency[] = [];
-  private fiatCurrencyData: Currency[] = [];
-  private activeCryptoCurrencyData: Currency[] = [];
-  private activeFiatCurrencyData: Currency[] = [];
-  private offersData: OffersData[] = [];
-  private tradesData: TradesData[] = [];
-  private fiatCurrenciesIndexed: { [code: string]: true } = {};
-  private allCurrenciesIndexed: { [code: string]: Currency } = {};
-  private tradeDataByMarket: { [market: string]: TradesData[] } = {};
-  private tickersCache: Ticker | Tickers | null = null;
-
-  constructor() { }
-
-  setOffersData(offers: OffersData[]) {
-    this.offersData = offers;
-  }
-
-  setTradesData(trades: TradesData[]) {
-    this.tradesData = trades;
-    this.tradeDataByMarket = {};
-
-    this.tradesData.forEach((trade) => {
-      trade._market = trade.currencyPair.toLowerCase().replace('/', '_');
-      if (!this.tradeDataByMarket[trade._market]) {
-        this.tradeDataByMarket[trade._market] = [];
-      }
-      this.tradeDataByMarket[trade._market].push(trade);
-    });
-  }
-
-  setCurrencyData(cryptoCurrency: Currency[], fiatCurrency: Currency[], activeCryptoCurrency: Currency[], activeFiatCurrency: Currency[]) {
-    this.cryptoCurrencyData = cryptoCurrency,
-    this.fiatCurrencyData = fiatCurrency,
-    this.activeCryptoCurrencyData = activeCryptoCurrency,
-    this.activeFiatCurrencyData = activeFiatCurrency;
-
-    this.fiatCurrenciesIndexed = {};
-    this.allCurrenciesIndexed = {};
-
-    this.fiatCurrencyData.forEach((currency) => {
-      currency._type = 'fiat';
-      this.fiatCurrenciesIndexed[currency.code] = true;
-      this.allCurrenciesIndexed[currency.code] = currency;
-    });
-    this.cryptoCurrencyData.forEach((currency) => {
-       currency._type = 'crypto';
-       this.allCurrenciesIndexed[currency.code] = currency;
-    });
-  }
-
-  updateCache() {
-    this.tickersCache = null;
-    this.tickersCache = this.getTicker();
-  }
-
-  getCurrencies(
-    type: 'crypto' | 'fiat' | 'active' | 'all' = 'all',
-  ): Currencies {
-    let currencies: Currency[];
-
-    switch (type) {
-      case 'fiat':
-        currencies = this.fiatCurrencyData;
-        break;
-      case 'crypto':
-        currencies = this.cryptoCurrencyData;
-        break;
-      case 'active':
-        currencies = this.activeCryptoCurrencyData.concat(this.activeFiatCurrencyData);
-        break;
-      case 'all':
-      default:
-        currencies = this.cryptoCurrencyData.concat(this.fiatCurrencyData);
-    }
-    const result = {};
-    currencies.forEach((currency) => {
-      result[currency.code] = currency;
-    });
-    return result;
-  }
-
-  getDepth(
-    market: string,
-  ): Depth {
-    const currencyPair = market.replace('_', '/').toUpperCase();
-
-    const buys = this.offersData
-      .filter((offer) => offer.currencyPair === currencyPair && offer.primaryMarketDirection === 'BUY')
-      .map((offer) => offer.price)
-      .sort((a, b) => b - a)
-      .map((price) => this.intToBtc(price));
-
-    const sells = this.offersData
-      .filter((offer) => offer.currencyPair === currencyPair && offer.primaryMarketDirection === 'SELL')
-      .map((offer) => offer.price)
-      .sort((a, b) => a - b)
-      .map((price) => this.intToBtc(price));
-
-    const result = {};
-    result[market] = {
-      'buys': buys,
-      'sells': sells,
-    };
-    return result;
-  }
-
-  getOffers(
-    market: string,
-    direction?: 'buy' | 'sell',
-  ): Offers {
-    const currencyPair = market.replace('_', '/').toUpperCase();
-
-    let buys: Offer[] | null = null;
-    let sells: Offer[] | null = null;
-
-    if (!direction || direction === 'buy') {
-      buys = this.offersData
-        .filter((offer) => offer.currencyPair === currencyPair && offer.primaryMarketDirection === 'BUY')
-        .sort((a, b) => b.price - a.price)
-        .map((offer) => this.offerDataToOffer(offer, market));
-    }
-
-    if (!direction || direction === 'sell') {
-      sells = this.offersData
-        .filter((offer) => offer.currencyPair === currencyPair && offer.primaryMarketDirection === 'SELL')
-        .sort((a, b) => a.price - b.price)
-        .map((offer) => this.offerDataToOffer(offer, market));
-    }
-
-    const result: Offers = {};
-    result[market] = {
-      'buys': buys,
-      'sells': sells,
-    };
-    return result;
-  }
-
-  getMarkets(): Markets {
-    const allCurrencies = this.getCurrencies();
-    const activeCurrencies = this.getCurrencies('active');
-    const markets = {};
-
-    for (const currency of Object.keys(activeCurrencies)) {
-      if (allCurrencies[currency].code === 'BTC') {
-        continue;
-      }
-
-      const isFiat = allCurrencies[currency]._type === 'fiat';
-      const pmarketname = allCurrencies['BTC']['name'];
-
-      const lsymbol = isFiat ? 'BTC' : currency;
-      const rsymbol = isFiat ? currency : 'BTC';
-      const lname = isFiat ? pmarketname : allCurrencies[currency].name;
-      const rname = isFiat ? allCurrencies[currency].name : pmarketname;
-      const ltype = isFiat ? 'crypto' : allCurrencies[currency]._type;
-      const rtype = isFiat ? 'fiat' : 'crypto';
-      const lprecision = 8;
-      const rprecision = isFiat ? 2 : 8;
-      const pair = lsymbol.toLowerCase() + '_' + rsymbol.toLowerCase();
-
-      markets[pair] = {
-        'pair': pair,
-        'lname': lname,
-        'rname': rname,
-        'lsymbol': lsymbol,
-        'rsymbol': rsymbol,
-        'lprecision': lprecision,
-        'rprecision': rprecision,
-        'ltype': ltype,
-        'rtype': rtype,
-        'name': lname + '/' + rname,
-      };
-    }
-
-    return markets;
-  }
-
-  getTrades(
-    market: string,
-    timestamp_from?: number,
-    timestamp_to?: number,
-    trade_id_from?: string,
-    trade_id_to?: string,
-    direction?: 'buy' | 'sell',
-    limit: number = 100,
-    sort: 'asc' | 'desc' = 'desc',
-  ): BisqTrade[] {
-      limit = Math.min(limit, 2000);
-      const _market = market === 'all' ? undefined : market;
-
-      if (!timestamp_from) {
-        timestamp_from = new Date('2016-01-01').getTime() / 1000;
-      }
-      if (!timestamp_to) {
-        timestamp_to = new Date().getTime() / 1000;
-      }
-
-      const matches = this.getTradesByCriteria(_market, timestamp_to, timestamp_from,
-        trade_id_to, trade_id_from, direction, sort, limit, false);
-
-      if (sort === 'asc') {
-        matches.sort((a, b) => a.tradeDate - b.tradeDate);
-      } else {
-        matches.sort((a, b) => b.tradeDate - a.tradeDate);
-      }
-
-      return matches.map((trade) => {
-        const bsqTrade: BisqTrade = {
-          direction: trade.primaryMarketDirection,
-          price: trade._tradePriceStr,
-          amount: trade._tradeAmountStr,
-          volume: trade._tradeVolumeStr,
-          payment_method: trade.paymentMethod,
-          trade_id: trade.offerId,
-          trade_date: trade.tradeDate,
-        };
-        if (market === 'all') {
-          bsqTrade.market = trade._market;
-        }
-        return bsqTrade;
-      });
-  }
-
-  getVolumes(
-    market?: string,
-    timestamp_from?: number,
-    timestamp_to?: number,
-    interval: Interval = 'auto',
-    milliseconds?: boolean,
-    timestamp: 'no' | 'yes' = 'yes',
-  ): MarketVolume[] {
-    if (milliseconds) {
-      timestamp_from = timestamp_from ? timestamp_from / 1000 : timestamp_from;
-      timestamp_to = timestamp_to ? timestamp_to / 1000 : timestamp_to;
-    }
-    if (!timestamp_from) {
-      timestamp_from = new Date('2016-01-01').getTime() / 1000;
-    }
-    if (!timestamp_to) {
-      timestamp_to = new Date().getTime() / 1000;
-    }
-
-    const trades = this.getTradesByCriteria(market, timestamp_to, timestamp_from,
-      undefined, undefined, undefined, 'asc', Number.MAX_SAFE_INTEGER);
-
-    if (interval === 'auto') {
-      const range = timestamp_to - timestamp_from;
-      interval = this.getIntervalFromRange(range);
-    }
-
-    const intervals: any = {};
-    const marketVolumes: MarketVolume[] = [];
-
-    for (const trade of trades) {
-      const traded_at = trade['tradeDate'] / 1000;
-      const interval_start = this.intervalStart(traded_at, interval);
-
-      if (!intervals[interval_start]) {
-        intervals[interval_start] = {
-          'volume': 0,
-          'num_trades': 0,
-        };
-      }
-
-      const period = intervals[interval_start];
-      period['period_start'] = interval_start;
-      period['volume'] += this.fiatCurrenciesIndexed[trade.currency] ? trade._tradeAmount : trade._tradeVolume;
-      period['num_trades']++;
-    }
-
-    for (const p in intervals) {
-      if (intervals.hasOwnProperty(p)) {
-        const period = intervals[p];
-        marketVolumes.push({
-          period_start: timestamp === 'no' ? new Date(period['period_start'] * 1000).toISOString() : period['period_start'],
-          num_trades: period['num_trades'],
-          volume: this.intToBtc(period['volume']),
-        });
-      }
-    }
-
-    return marketVolumes;
-  }
-
-  getTicker(
-    market?: string,
-  ): Tickers | Ticker | null {
-    if (market) {
-      return this.getTickerFromMarket(market);
-    }
-
-    if (this.tickersCache) {
-      return this.tickersCache;
-    }
-
-    const allMarkets = this.getMarkets();
-    const tickers = {};
-    for (const m in allMarkets) {
-      if (allMarkets.hasOwnProperty(m)) {
-        tickers[allMarkets[m].pair] = this.getTickerFromMarket(allMarkets[m].pair);
-      }
-    }
-
-    return tickers;
-  }
-
-  getTickerFromMarket(market: string): Ticker | null {
-    let ticker: Ticker;
-    const timestamp_from = strtotime('-24 hour');
-    const timestamp_to = new Date().getTime() / 1000;
-    const trades = this.getTradesByCriteria(market, timestamp_to, timestamp_from,
-      undefined, undefined, undefined, 'asc', Number.MAX_SAFE_INTEGER);
-
-    const periods: SummarizedInterval[] = Object.values(this.getTradesSummarized(trades, timestamp_from));
-
-    const allCurrencies = this.getCurrencies();
-    const currencyRight = allCurrencies[market.split('_')[1].toUpperCase()];
-
-    if (periods[0]) {
-      ticker = {
-        'last': this.intToBtc(periods[0].close),
-        'high': this.intToBtc(periods[0].high),
-        'low': this.intToBtc(periods[0].low),
-        'volume_left': this.intToBtc(periods[0].volume_left),
-        'volume_right': this.intToBtc(periods[0].volume_right),
-        'buy': null,
-        'sell': null,
-      };
-    } else {
-      const lastTrade = this.tradeDataByMarket[market];
-      if (!lastTrade) {
-        return null;
-      }
-      const tradePrice = lastTrade[0].primaryMarketTradePrice * Math.pow(10, 8 - currencyRight.precision);
-
-      const lastTradePrice = this.intToBtc(tradePrice);
-      ticker = {
-        'last': lastTradePrice,
-        'high': lastTradePrice,
-        'low': lastTradePrice,
-        'volume_left': '0',
-        'volume_right': '0',
-        'buy': null,
-        'sell': null,
-      };
-    }
-
-    const timestampFromMilli = timestamp_from * 1000;
-    const timestampToMilli = timestamp_to * 1000;
-
-    const currencyPair = market.replace('_', '/').toUpperCase();
-    const offersData = this.offersData.slice().sort((a, b) => a.price - b.price);
-
-    const buy = offersData.find((offer) => offer.currencyPair === currencyPair
-                                          && offer.primaryMarketDirection === 'BUY'
-                                          && offer.date >= timestampFromMilli
-                                          && offer.date <= timestampToMilli
-                                        );
-    const sell = offersData.find((offer) => offer.currencyPair === currencyPair
-                                            && offer.primaryMarketDirection === 'SELL'
-                                            && offer.date >= timestampFromMilli
-                                            && offer.date <= timestampToMilli
-                                          );
-
-    if (buy) {
-      ticker.buy = this.intToBtc(buy.primaryMarketPrice * Math.pow(10, 8 - currencyRight.precision));
-    }
-    if (sell) {
-      ticker.sell = this.intToBtc(sell.primaryMarketPrice * Math.pow(10, 8 - currencyRight.precision));
-    }
-
-    return ticker;
-  }
-
-  getHloc(
-    market: string,
-    interval: Interval = 'auto',
-    timestamp_from?: number,
-    timestamp_to?: number,
-    milliseconds?: boolean,
-    timestamp: 'no' | 'yes' = 'yes',
-  ): HighLowOpenClose[] {
-    if (milliseconds) {
-      timestamp_from = timestamp_from ? timestamp_from / 1000 : timestamp_from;
-      timestamp_to = timestamp_to ? timestamp_to / 1000 : timestamp_to;
-    }
-    if (!timestamp_from) {
-      timestamp_from = new Date('2016-01-01').getTime() / 1000;
-    }
-    if (!timestamp_to) {
-      timestamp_to = new Date().getTime() / 1000;
-    }
-
-    const trades = this.getTradesByCriteria(market, timestamp_to, timestamp_from,
-      undefined, undefined, undefined, 'asc', Number.MAX_SAFE_INTEGER);
-
-    if (interval === 'auto') {
-      const range = timestamp_to - timestamp_from;
-      interval = this.getIntervalFromRange(range);
-    }
-
-    const intervals = this.getTradesSummarized(trades, timestamp_from, interval);
-
-    const hloc: HighLowOpenClose[] = [];
-
-    for (const p in intervals) {
-      if (intervals.hasOwnProperty(p)) {
-        const period = intervals[p];
-        hloc.push({
-          period_start: timestamp === 'no' ? new Date(period['period_start'] * 1000).toISOString() : period['period_start'],
-          open: this.intToBtc(period['open']),
-          close: this.intToBtc(period['close']),
-          high: this.intToBtc(period['high']),
-          low: this.intToBtc(period['low']),
-          avg: this.intToBtc(period['avg']),
-          volume_right: this.intToBtc(period['volume_right']),
-          volume_left: this.intToBtc(period['volume_left']),
-        });
-      }
-    }
-
-    return hloc;
-  }
-
-  private getIntervalFromRange(range: number): Interval {
-    // two days range loads minute data
-    if (range <= 3600) {
-      // up to one hour range loads minutely data
-      return 'minute';
-    } else if (range <= 1 * 24 * 3600) {
-      // up to one day range loads half-hourly data
-      return 'half_hour';
-    } else if (range <= 3 * 24 * 3600) {
-      // up to 3 day range loads hourly data
-      return 'hour';
-    } else if (range <= 7 * 24 * 3600) {
-      // up to 7 day range loads half-daily data
-      return 'half_day';
-    } else if (range <= 60 * 24 * 3600) {
-      // up to 2 month range loads daily data
-      return 'day';
-    } else if (range <= 12 * 31 * 24 * 3600) {
-      // up to one year range loads weekly data
-      return 'week';
-    } else if (range <= 12 * 31 * 24 * 3600) {
-      // up to 5 year range loads monthly data
-      return 'month';
-    } else {
-      // greater range loads yearly data
-      return 'year';
-    }
-  }
-
-  getVolumesByTime(time: number): MarketVolume[] {
-    const timestamp_from = new Date().getTime() / 1000 - time;
-    const timestamp_to = new Date().getTime() / 1000;
-
-    const trades = this.getTradesByCriteria(undefined, timestamp_to, timestamp_from,
-      undefined, undefined, undefined, 'asc', Number.MAX_SAFE_INTEGER);
-
-    const markets: any = {};
-
-    for (const trade of trades) {
-      if (!markets[trade._market]) {
-        markets[trade._market] = {
-          'volume': 0,
-          'num_trades': 0,
-        };
-      }
-
-      markets[trade._market]['volume'] += this.fiatCurrenciesIndexed[trade.currency] ? trade._tradeAmount : trade._tradeVolume;
-      markets[trade._market]['num_trades']++;
-    }
-
-    return markets;
-  }
-
-  private getTradesSummarized(trades: TradesData[], timestamp_from: number, interval?: string): SummarizedIntervals {
-    const intervals: any = {};
-    const intervals_prices: any = {};
-
-    for (const trade of trades) {
-      const traded_at = trade.tradeDate / 1000;
-      const interval_start = !interval ? timestamp_from : this.intervalStart(traded_at, interval);
-
-      if (!intervals[interval_start]) {
-          intervals[interval_start] = {
-            'open': 0,
-            'close': 0,
-            'high': 0,
-            'low': 0,
-            'avg': 0,
-            'volume_right': 0,
-            'volume_left': 0,
-        };
-        intervals_prices[interval_start] = [];
-      }
-      const period = intervals[interval_start];
-      const price = trade._tradePrice;
-
-      if (!intervals_prices[interval_start]['leftvol']) {
-        intervals_prices[interval_start]['leftvol'] = [];
-      }
-      if (!intervals_prices[interval_start]['rightvol']) {
-        intervals_prices[interval_start]['rightvol'] = [];
-      }
-
-      intervals_prices[interval_start]['leftvol'].push(trade._tradeAmount);
-      intervals_prices[interval_start]['rightvol'].push(trade._tradeVolume);
-
-      if (price) {
-          const plow = period['low'];
-          period['period_start'] = interval_start;
-          period['open'] = period['open'] || price;
-          period['close'] = price;
-          period['high'] = price > period['high'] ? price : period['high'];
-          period['low'] = (plow && price > plow) ? period['low'] : price;
-          period['avg'] = intervals_prices[interval_start]['rightvol'].reduce((p: number, c: number) => c + p, 0)
-            / intervals_prices[interval_start]['leftvol'].reduce((c: number, p: number) => c + p, 0) * 100000000;
-          period['volume_left'] += trade._tradeAmount;
-          period['volume_right'] += trade._tradeVolume;
-      }
-    }
-    return intervals;
-  }
-
-  private getTradesByCriteria(
-    market: string | undefined,
-    timestamp_to: number,
-    timestamp_from: number,
-    trade_id_to: string | undefined,
-    trade_id_from: string | undefined,
-    direction: 'buy' | 'sell' | undefined,
-    sort: string,
-    limit: number,
-    integerAmounts: boolean = true,
- ): TradesData[] {
-    let trade_id_from_ts: number | null = null;
-    let trade_id_to_ts: number | null = null;
-    const allCurrencies = this.getCurrencies();
-
-    const timestampFromMilli = timestamp_from * 1000;
-    const timestampToMilli = timestamp_to * 1000;
-
-    // note: the offer_id_from/to depends on iterating over trades in
-    // descending chronological order.
-    const tradesDataSorted = this.tradesData.slice();
-    if (sort === 'asc') {
-      tradesDataSorted.reverse();
-    }
-
-    let matches: TradesData[] = [];
-    for (const trade of tradesDataSorted) {
-      if (trade_id_from === trade.offerId) {
-        trade_id_from_ts = trade.tradeDate;
-      }
-      if (trade_id_to === trade.offerId) {
-        trade_id_to_ts = trade.tradeDate;
-      }
-      if (trade_id_to && trade_id_to_ts === null) {
-        continue;
-      }
-      if (trade_id_from && trade_id_from_ts != null && trade_id_from_ts !== trade.tradeDate) {
-        continue;
-      }
-      if (market && market !== trade._market) {
-        continue;
-      }
-      if (timestampFromMilli && timestampFromMilli > trade.tradeDate) {
-        continue;
-      }
-      if (timestampToMilli && timestampToMilli < trade.tradeDate) {
-        continue;
-      }
-      if (direction && direction !== trade.direction.toLowerCase()) {
-        continue;
-      }
-
-      // Filter out bogus trades with BTC/BTC or XXX/XXX market.
-      // See github issue: https://github.com/bitsquare/bitsquare/issues/883
-      const currencyPairs = trade.currencyPair.split('/');
-      if (currencyPairs[0] === currencyPairs[1]) {
-        continue;
-      }
-
-      const currencyLeft = allCurrencies[currencyPairs[0]];
-      const currencyRight = allCurrencies[currencyPairs[1]];
-
-      if (!currencyLeft || !currencyRight) {
-        continue;
-      }
-
-      const tradePrice = trade.primaryMarketTradePrice * Math.pow(10, 8 - currencyRight.precision);
-      const tradeAmount = trade.primaryMarketTradeAmount * Math.pow(10, 8 - currencyLeft.precision);
-      const tradeVolume = trade.primaryMarketTradeVolume * Math.pow(10, 8 - currencyRight.precision);
-
-      if (integerAmounts) {
-        trade._tradePrice = tradePrice;
-        trade._tradeAmount = tradeAmount;
-        trade._tradeVolume = tradeVolume;
-        trade._offerAmount = trade.offerAmount;
-      } else {
-        trade._tradePriceStr = this.intToBtc(tradePrice);
-        trade._tradeAmountStr = this.intToBtc(tradeAmount);
-        trade._tradeVolumeStr = this.intToBtc(tradeVolume);
-        trade._offerAmountStr = this.intToBtc(trade.offerAmount);
-      }
-
-      matches.push(trade);
-
-      if (matches.length >= limit) {
-        break;
-      }
-    }
-
-    if ((trade_id_from && !trade_id_from_ts) || (trade_id_to && !trade_id_to_ts)) {
-      matches = [];
-    }
-    return matches;
-  }
-
-  private intervalStart(ts: number, interval: string): number {
-    switch (interval) {
-        case 'minute':
-            return (ts - (ts % 60));
-        case '10_minute':
-            return (ts - (ts % 600));
-        case 'half_hour':
-            return (ts - (ts % 1800));
-        case 'hour':
-            return (ts - (ts % 3600));
-        case 'half_day':
-            return (ts - (ts % (3600 * 12)));
-        case 'day':
-            return strtotime('midnight today', ts);
-        case 'week':
-            return strtotime('midnight sunday last week', ts);
-        case 'month':
-            return strtotime('midnight first day of this month', ts);
-        case 'year':
-            return strtotime('midnight first day of january', ts);
-        default:
-            throw new Error('Unsupported interval: ' + interval);
-    }
-}
-
-  private offerDataToOffer(offer: OffersData, market: string): Offer {
-    const currencyPairs = market.split('_');
-    const currencyRight = this.allCurrenciesIndexed[currencyPairs[1].toUpperCase()];
-    const currencyLeft = this.allCurrenciesIndexed[currencyPairs[0].toUpperCase()];
-    const price = offer['primaryMarketPrice'] * Math.pow( 10, 8 - currencyRight['precision']);
-    const amount = offer['primaryMarketAmount'] * Math.pow( 10, 8 - currencyLeft['precision']);
-    const volume = offer['primaryMarketVolume'] * Math.pow( 10, 8 - currencyRight['precision']);
-
-    return {
-      offer_id: offer.id,
-      offer_date: offer.date,
-      direction: offer.primaryMarketDirection,
-      min_amount: this.intToBtc(offer.minAmount),
-      amount: this.intToBtc(amount),
-      price: this.intToBtc(price),
-      volume: this.intToBtc(volume),
-      payment_method: offer.paymentMethod,
-      offer_fee_txid: null,
-    };
-  }
-
-  private intToBtc(val: number): string {
-    return (val / 100000000).toFixed(8);
-  }
-}
-
-export default new BisqMarketsApi();

backend/src/api/bisq/markets.ts

@@ -1,137 +0,0 @@
-import config from '../../config';
-import * as fs from 'fs';
-import { OffersData as OffersData, TradesData, Currency } from './interfaces';
-import bisqMarket from './markets-api';
-import logger from '../../logger';
-
-class Bisq {
-  private static FOLDER_WATCH_CHANGE_DETECTION_DEBOUNCE = 4000;
-  private static MARKET_JSON_PATH = config.BISQ.DATA_PATH;
-  private static MARKET_JSON_FILE_PATHS = {
-    activeCryptoCurrency: '/active_crypto_currency_list.json',
-    activeFiatCurrency: '/active_fiat_currency_list.json',
-    cryptoCurrency: '/crypto_currency_list.json',
-    fiatCurrency: '/fiat_currency_list.json',
-    offers: '/offers_statistics.json',
-    trades: '/trade_statistics.json',
-  };
-
-  private cryptoCurrencyLastMtime = new Date('2016-01-01');
-  private fiatCurrencyLastMtime = new Date('2016-01-01');
-  private offersLastMtime = new Date('2016-01-01');
-  private tradesLastMtime = new Date('2016-01-01');
-
-  private subdirectoryWatcher: fs.FSWatcher | undefined;
-
-  constructor() {}
-
-  startBisqService(): void {
-    try {
-      this.checkForBisqDataFolder();
-    } catch (e) {
-      logger.info('Retrying to start bisq service (markets) in 3 minutes');
-      setTimeout(this.startBisqService.bind(this), 180000);
-      return;
-    }
-    this.loadBisqDumpFile();
-    this.startBisqDirectoryWatcher();
-  }
-
-  private checkForBisqDataFolder() {
-    if (!fs.existsSync(Bisq.MARKET_JSON_PATH + Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency)) {
-      logger.err(Bisq.MARKET_JSON_PATH + Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency + ` doesn't exist. Make sure Bisq is running and the config is correct before starting the server.`);
-      throw new Error(`Cannot load BISQ ${Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency} file`);
-    }
-  }
-
-  private startBisqDirectoryWatcher() {
-    if (this.subdirectoryWatcher) {
-      this.subdirectoryWatcher.close();
-    }
-    if (!fs.existsSync(Bisq.MARKET_JSON_PATH + Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency)) {
-      logger.warn(Bisq.MARKET_JSON_PATH + Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency + ` doesn't exist. Trying to restart sub directory watcher again in 3 minutes.`);
-      setTimeout(() => this.startBisqDirectoryWatcher(), 180000);
-      return;
-    }
-    let fsWait: NodeJS.Timeout | null = null;
-    this.subdirectoryWatcher = fs.watch(Bisq.MARKET_JSON_PATH, () => {
-      if (fsWait) {
-        clearTimeout(fsWait);
-      }
-      fsWait = setTimeout(() => {
-        logger.debug(`Change detected in the Bisq market data folder.`);
-        this.loadBisqDumpFile();
-      }, Bisq.FOLDER_WATCH_CHANGE_DETECTION_DEBOUNCE);
-    });
-  }
-
-  private async loadBisqDumpFile(): Promise<void> {
-    const start = new Date().getTime();
-    try {
-      let marketsDataUpdated = false;
-      const cryptoMtime = this.getFileMtime(Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency);
-      const fiatMtime = this.getFileMtime(Bisq.MARKET_JSON_FILE_PATHS.fiatCurrency);
-      if (cryptoMtime > this.cryptoCurrencyLastMtime || fiatMtime > this.fiatCurrencyLastMtime) {
-        const cryptoCurrencyData = await this.loadData<Currency[]>(Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency);
-        const fiatCurrencyData = await this.loadData<Currency[]>(Bisq.MARKET_JSON_FILE_PATHS.fiatCurrency);
-        const activeCryptoCurrencyData = await this.loadData<Currency[]>(Bisq.MARKET_JSON_FILE_PATHS.activeCryptoCurrency);
-        const activeFiatCurrencyData = await this.loadData<Currency[]>(Bisq.MARKET_JSON_FILE_PATHS.activeFiatCurrency);
-        logger.debug('Updating Bisq Market Currency Data');
-        bisqMarket.setCurrencyData(cryptoCurrencyData, fiatCurrencyData, activeCryptoCurrencyData, activeFiatCurrencyData);
-        if (cryptoMtime > this.cryptoCurrencyLastMtime) {
-          this.cryptoCurrencyLastMtime = cryptoMtime;
-        }
-        if (fiatMtime > this.fiatCurrencyLastMtime) {
-          this.fiatCurrencyLastMtime = fiatMtime;
-        }
-        marketsDataUpdated = true;
-      }
-      const offersMtime = this.getFileMtime(Bisq.MARKET_JSON_FILE_PATHS.offers);
-      if (offersMtime > this.offersLastMtime) {
-        const offersData = await this.loadData<OffersData[]>(Bisq.MARKET_JSON_FILE_PATHS.offers);
-        logger.debug('Updating Bisq Market Offers Data');
-        bisqMarket.setOffersData(offersData);
-        this.offersLastMtime = offersMtime;
-        marketsDataUpdated = true;
-      }
-      const tradesMtime = this.getFileMtime(Bisq.MARKET_JSON_FILE_PATHS.trades);
-      if (tradesMtime > this.tradesLastMtime) {
-        const tradesData = await this.loadData<TradesData[]>(Bisq.MARKET_JSON_FILE_PATHS.trades);
-        logger.debug('Updating Bisq Market Trades Data');
-        bisqMarket.setTradesData(tradesData);
-        this.tradesLastMtime = tradesMtime;
-        marketsDataUpdated = true;
-      }
-      if (marketsDataUpdated) {
-        bisqMarket.updateCache();
-        const time = new Date().getTime() - start;
-        logger.debug('Bisq market data updated in ' + time + ' ms');
-      }
-    } catch (e) {
-      logger.err('loadBisqMarketDataDumpFile() error.' + (e instanceof Error ? e.message : e));
-    }
-  }
-
-  private getFileMtime(path: string): Date {
-    const stats = fs.statSync(Bisq.MARKET_JSON_PATH + path);
-    return stats.mtime;
-  }
-
-  private loadData<T>(path: string): Promise<T> {
-    return new Promise((resolve, reject) => {
-      fs.readFile(Bisq.MARKET_JSON_PATH + path, 'utf8', (err, data) => {
-        if (err) {
-          reject(err);
-        }
-        try {
-          const parsedData = JSON.parse(data);
-          resolve(parsedData);
-        } catch (e) {
-          reject('JSON parse error (' + path + ')');
-        }
-      });
-    });
-  }
-}
-
-export default new Bisq();

backend/src/api/bitcoin/bitcoin-api-abstract-factory.ts

@@ -1,10 +1,12 @@
+import { IBitcoinApi } from './bitcoin-api.interface';
 import { IEsploraApi } from './esplora-api.interface';
 
 export interface AbstractBitcoinApi {
   $getRawMempool(): Promise<IEsploraApi.Transaction['txid'][]>;
   $getRawTransaction(txId: string, skipConversion?: boolean, addPrevout?: boolean, lazyPrevouts?: boolean): Promise<IEsploraApi.Transaction>;
+  $getRawTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]>;
   $getMempoolTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]>;
-  $getAllMempoolTransactions(lastTxid: string);
+  $getAllMempoolTransactions(lastTxid?: string, max_txs?: number);
   $getTransactionHex(txId: string): Promise<string>;
   $getBlockHeightTip(): Promise<number>;
   $getBlockHashTip(): Promise<string>;
@@ -23,8 +25,11 @@ export interface AbstractBitcoinApi {
   $getOutspend(txId: string, vout: number): Promise<IEsploraApi.Outspend>;
   $getOutspends(txId: string): Promise<IEsploraApi.Outspend[]>;
   $getBatchedOutspends(txId: string[]): Promise<IEsploraApi.Outspend[][]>;
+  $getBatchedOutspendsInternal(txId: string[]): Promise<IEsploraApi.Outspend[][]>;
+  $getOutSpendsByOutpoint(outpoints: { txid: string, vout: number }[]): Promise<IEsploraApi.Outspend[]>;
 
   startHealthChecks(): void;
+  getHealthStatus(): HealthCheckHost[];
 }
 export interface BitcoinRpcCredentials {
   host: string;
@@ -32,4 +37,17 @@ export interface BitcoinRpcCredentials {
   user: string;
   pass: string;
   timeout: number;
+  cookie?: string;
+}
+
+export interface HealthCheckHost {
+  host: string;
+  active: boolean;
+  rtt: number;
+  latestHeight: number;
+  socket: boolean;
+  outOfSync: boolean;
+  unreachable: boolean;
+  checked: boolean;
+  lastChecked: number;
 }

backend/src/api/bitcoin/bitcoin-api.interface.ts

@@ -106,6 +106,7 @@ export namespace IBitcoinApi {
       address?: string;              //  (string) bitcoin address
       addresses?: string[];           //  (string) bitcoin addresses
       pegout_chain?: string;         //  (string) Elements peg-out chain
+      pegout_address?: string;       //  (string) Elements peg-out address
       pegout_addresses?: string[];   //  (string) Elements peg-out addresses
     };
   }

backend/src/api/bitcoin/bitcoin-api.ts

@@ -1,5 +1,5 @@
 import * as bitcoinjs from 'bitcoinjs-lib';
-import { AbstractBitcoinApi } from './bitcoin-api-abstract-factory';
+import { AbstractBitcoinApi, HealthCheckHost } from './bitcoin-api-abstract-factory';
 import { IBitcoinApi } from './bitcoin-api.interface';
 import { IEsploraApi } from './esplora-api.interface';
 import blocks from '../blocks';
@@ -60,11 +60,24 @@ class BitcoinApi implements AbstractBitcoinApi {
       });
   }
 
+  async $getRawTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
+    const txs: IEsploraApi.Transaction[] = [];
+    for (const txid of txids) {
+      try {
+        const tx = await this.$getRawTransaction(txid, false, true);
+        txs.push(tx);
+      } catch (err) {
+        // skip failures
+      }
+    }
+    return txs;
+  }
+
   $getMempoolTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
     throw new Error('Method getMempoolTransactions not supported by the Bitcoin RPC API.');
   }
 
-  $getAllMempoolTransactions(lastTxid: string): Promise<IEsploraApi.Transaction[]> {
+  $getAllMempoolTransactions(lastTxid?: string, max_txs?: number): Promise<IEsploraApi.Transaction[]> {
     throw new Error('Method getAllMempoolTransactions not supported by the Bitcoin RPC API.');
 
   }
@@ -198,6 +211,19 @@ class BitcoinApi implements AbstractBitcoinApi {
     return outspends;
   }
 
+  async $getBatchedOutspendsInternal(txId: string[]): Promise<IEsploraApi.Outspend[][]> {
+    return this.$getBatchedOutspends(txId);
+  }
+
+  async $getOutSpendsByOutpoint(outpoints: { txid: string, vout: number }[]): Promise<IEsploraApi.Outspend[]> {
+    const outspends: IEsploraApi.Outspend[] = [];
+    for (const outpoint of outpoints) {
+      const outspend = await this.$getOutspend(outpoint.txid, outpoint.vout);
+      outspends.push(outspend);
+    }
+    return outspends;
+  }
+
   $getEstimatedHashrate(blockHeight: number): Promise<number> {
     // 120 is the default block span in Core
     return this.bitcoindClient.getNetworkHashPs(120, blockHeight);
@@ -356,6 +382,10 @@ class BitcoinApi implements AbstractBitcoinApi {
   }
 
   public startHealthChecks(): void {};
+
+  public getHealthStatus() {
+    return [];
+  }
 }
 
 export default BitcoinApi;

backend/src/api/bitcoin/bitcoin-client.ts

@@ -8,6 +8,7 @@ const nodeRpcCredentials: BitcoinRpcCredentials = {
   user: config.CORE_RPC.USERNAME,
   pass: config.CORE_RPC.PASSWORD,
   timeout: config.CORE_RPC.TIMEOUT,
+  cookie: config.CORE_RPC.COOKIE ? config.CORE_RPC.COOKIE_PATH : undefined,
 };
 
 export default new bitcoin.Client(nodeRpcCredentials);

backend/src/api/bitcoin/bitcoin-core.routes.ts

@@ -0,0 +1,249 @@
+import { Application, NextFunction, Request, Response } from 'express';
+import logger from '../../logger';
+import bitcoinClient from './bitcoin-client';
+
+/**
+ * Define a set of routes used by the accelerator server
+ * Those routes are not designed to be public
+ */
+class BitcoinBackendRoutes {
+  private static tag = 'BitcoinBackendRoutes';
+
+  public initRoutes(app: Application) {
+    app
+      .get('/api/internal/bitcoin-core/' + 'get-mempool-entry', this.disableCache, this.$getMempoolEntry)
+      .post('/api/internal/bitcoin-core/' + 'decode-raw-transaction', this.disableCache, this.$decodeRawTransaction)
+      .get('/api/internal/bitcoin-core/' + 'get-raw-transaction', this.disableCache, this.$getRawTransaction)
+      .post('/api/internal/bitcoin-core/' + 'send-raw-transaction', this.disableCache, this.$sendRawTransaction)
+      .post('/api/internal/bitcoin-core/' + 'test-mempool-accept', this.disableCache, this.$testMempoolAccept)
+      .get('/api/internal/bitcoin-core/' + 'get-mempool-ancestors', this.disableCache, this.$getMempoolAncestors)
+      .get('/api/internal/bitcoin-core/' + 'get-block', this.disableCache, this.$getBlock)
+      .get('/api/internal/bitcoin-core/' + 'get-block-hash', this.disableCache, this.$getBlockHash)
+      .get('/api/internal/bitcoin-core/' + 'get-block-count', this.disableCache, this.$getBlockCount)
+    ;
+  }
+
+  /**
+   * Disable caching for bitcoin core routes
+   * 
+   * @param req 
+   * @param res 
+   * @param next 
+   */
+  private disableCache(req: Request, res: Response, next: NextFunction): void  {
+    res.setHeader('Pragma', 'no-cache');
+    res.setHeader('Cache-control', 'private, no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0');
+    res.setHeader('expires', -1);
+    next();
+  }
+
+  /**
+   * Exeption handler to return proper details to the accelerator server
+   * 
+   * @param e 
+   * @param fnName 
+   * @param res 
+   */
+  private static handleException(e: any, fnName: string, res: Response): void {
+    if (typeof(e.code) === 'number') {
+      res.status(400).send(JSON.stringify(e, ['code', 'message']));
+    } else {     
+      const err = `exception in ${fnName}. ${e}. Details: ${JSON.stringify(e, ['code', 'message'])}`; 
+      logger.err(err, BitcoinBackendRoutes.tag);
+      res.status(500).send(err);
+    }
+  }
+
+  private async $getMempoolEntry(req: Request, res: Response): Promise<void> {
+    const txid = req.query.txid;
+    try {
+      if (typeof(txid) !== 'string' || txid.length !== 64) {
+        res.status(400).send(`invalid param txid ${txid}. must be a string of 64 char`);
+        return;
+      }
+      const mempoolEntry = await bitcoinClient.getMempoolEntry(txid);
+      if (!mempoolEntry) {
+        res.status(404).send(`no mempool entry found for txid ${txid}`);
+        return;
+      }
+      res.status(200).send(mempoolEntry);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'getMempoolEntry', res);
+    }
+  }
+
+  private async $decodeRawTransaction(req: Request, res: Response): Promise<void> {
+    const rawTx = req.body.rawTx;
+    try {
+      if (typeof(rawTx) !== 'string') {
+        res.status(400).send(`invalid param rawTx ${rawTx}. must be a string`);
+        return;
+      }
+      const decodedTx = await bitcoinClient.decodeRawTransaction(rawTx);
+      if (!decodedTx) {
+        res.status(400).send(`unable to decode rawTx ${rawTx}`);
+        return;
+      }
+      res.status(200).send(decodedTx);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'decodeRawTransaction', res);
+    }
+  }
+
+  private async $getRawTransaction(req: Request, res: Response): Promise<void> {
+    const txid = req.query.txid;
+    const verbose = req.query.verbose;
+    try {
+      if (typeof(txid) !== 'string' || txid.length !== 64) {
+        res.status(400).send(`invalid param txid ${txid}. must be a string of 64 char`);
+        return;
+      }
+      if (typeof(verbose) !== 'string') {
+        res.status(400).send(`invalid param verbose ${verbose}. must be a string representing an integer`);
+        return;
+      }
+      const verboseNumber = parseInt(verbose, 10);
+      if (typeof(verboseNumber) !== 'number') {
+        res.status(400).send(`invalid param verbose ${verbose}. must be a valid integer`);
+        return;
+      }
+
+      const decodedTx = await bitcoinClient.getRawTransaction(txid, verboseNumber);
+      if (!decodedTx) {
+        res.status(400).send(`unable to get raw transaction for txid ${txid}`);
+        return;
+      }
+      res.status(200).send(decodedTx);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'decodeRawTransaction', res);
+    }
+  }
+
+  private async $sendRawTransaction(req: Request, res: Response): Promise<void> {
+    const rawTx = req.body.rawTx;
+    try {
+      if (typeof(rawTx) !== 'string') {
+        res.status(400).send(`invalid param rawTx ${rawTx}. must be a string`);
+        return;
+      }
+      const txHex = await bitcoinClient.sendRawTransaction(rawTx);
+      if (!txHex) {
+        res.status(400).send(`unable to send rawTx ${rawTx}`);
+        return;
+      }
+      res.status(200).send(txHex);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'sendRawTransaction', res);
+    }
+  }
+
+  private async $testMempoolAccept(req: Request, res: Response): Promise<void> {
+    const rawTxs = req.body.rawTxs;
+    try {
+      if (typeof(rawTxs) !== 'object') {
+        res.status(400).send(`invalid param rawTxs ${JSON.stringify(rawTxs)}. must be an array of string`);
+        return;
+      }
+      const txHex = await bitcoinClient.testMempoolAccept(rawTxs);
+      if (typeof(txHex) !== 'object' || txHex.length === 0) {
+        res.status(400).send(`testmempoolaccept failed for raw txs ${JSON.stringify(rawTxs)}, got an empty result`);
+        return;
+      }
+      res.status(200).send(txHex);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'testMempoolAccept', res);
+    }
+  }
+
+  private async $getMempoolAncestors(req: Request, res: Response): Promise<void> {
+    const txid = req.query.txid;
+    const verbose = req.query.verbose;
+    try {
+      if (typeof(txid) !== 'string' || txid.length !== 64) {
+        res.status(400).send(`invalid param txid ${txid}. must be a string of 64 char`);
+        return;
+      }
+      if (typeof(verbose) !== 'string' || (verbose !== 'true' && verbose !== 'false')) {
+        res.status(400).send(`invalid param verbose ${verbose}. must be a string ('true' | 'false')`);
+        return;
+      }
+    
+      const ancestors = await bitcoinClient.getMempoolAncestors(txid, verbose === 'true' ? true : false);
+      if (!ancestors) {
+        res.status(400).send(`unable to get mempool ancestors for txid ${txid}`);
+        return;
+      }
+      res.status(200).send(ancestors);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'getMempoolAncestors', res);
+    }
+  }
+
+  private async $getBlock(req: Request, res: Response): Promise<void> {
+    const blockHash = req.query.hash;
+    const verbosity = req.query.verbosity;
+    try {
+      if (typeof(blockHash) !== 'string' || blockHash.length !== 64) {
+        res.status(400).send(`invalid param blockHash ${blockHash}. must be a string of 64 char`);
+        return;
+      }
+      if (typeof(verbosity) !== 'string') {
+        res.status(400).send(`invalid param verbosity ${verbosity}. must be a string representing an integer`);
+        return;
+      }
+      const verbosityNumber = parseInt(verbosity, 10);
+      if (typeof(verbosityNumber) !== 'number') {
+        res.status(400).send(`invalid param verbosity ${verbosity}. must be a valid integer`);
+        return;
+      }
+
+      const block = await bitcoinClient.getBlock(blockHash, verbosityNumber);
+      if (!block) {
+        res.status(400).send(`unable to get block for block hash ${blockHash}`);
+        return;
+      }
+      res.status(200).send(block);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'getBlock', res);
+    }
+  }
+
+  private async $getBlockHash(req: Request, res: Response): Promise<void> {
+    const blockHeight = req.query.height;
+    try {
+      if (typeof(blockHeight) !== 'string') {
+        res.status(400).send(`invalid param blockHeight ${blockHeight}, must be a string representing an integer`);
+        return;
+      }
+      const blockHeightNumber = parseInt(blockHeight, 10);
+      if (typeof(blockHeightNumber) !== 'number') {
+        res.status(400).send(`invalid param blockHeight ${blockHeight}. must be a valid integer`);
+        return;
+      }
+
+      const block = await bitcoinClient.getBlockHash(blockHeightNumber);
+      if (!block) {
+        res.status(400).send(`unable to get block hash for block height ${blockHeightNumber}`);
+        return;
+      }
+      res.status(200).send(block);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'getBlockHash', res);
+    }
+  }
+
+  private async $getBlockCount(req: Request, res: Response): Promise<void> {
+    try {
+      const count = await bitcoinClient.getBlockCount();
+      if (!count) {
+        res.status(400).send(`unable to get block count`);
+        return;
+      }
+      res.status(200).send(`${count}`);
+    } catch (e: any) {
+      BitcoinBackendRoutes.handleException(e, 'getBlockCount', res);
+    }
+  }
+}
+
+export default new BitcoinBackendRoutes

backend/src/api/bitcoin/bitcoin-second-client.ts

@@ -8,6 +8,7 @@ const nodeRpcCredentials: BitcoinRpcCredentials = {
   user: config.SECOND_CORE_RPC.USERNAME,
   pass: config.SECOND_CORE_RPC.PASSWORD,
   timeout: config.SECOND_CORE_RPC.TIMEOUT,
+  cookie: config.SECOND_CORE_RPC.COOKIE ? config.SECOND_CORE_RPC.COOKIE_PATH : undefined,
 };
 
 export default new bitcoin.Client(nodeRpcCredentials);

backend/src/api/bitcoin/bitcoin.routes.ts

@@ -19,12 +19,12 @@ import bitcoinClient from './bitcoin-client';
 import difficultyAdjustment from '../difficulty-adjustment';
 import transactionRepository from '../../repositories/TransactionRepository';
 import rbfCache from '../rbf-cache';
+import { calculateCpfp } from '../cpfp';
 
 class BitcoinRoutes {
   public initRoutes(app: Application) {
     app
       .get(config.MEMPOOL.API_URL_PREFIX + 'transaction-times', this.getTransactionTimes)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'outspends', this.$getBatchedOutspends)
       .get(config.MEMPOOL.API_URL_PREFIX + 'cpfp/:txId', this.$getCpfpInfo)
       .get(config.MEMPOOL.API_URL_PREFIX + 'difficulty-adjustment', this.getDifficultyChange)
       .get(config.MEMPOOL.API_URL_PREFIX + 'fees/recommended', this.getRecommendedFees)
@@ -37,60 +37,6 @@ class BitcoinRoutes {
       .get(config.MEMPOOL.API_URL_PREFIX + 'replacements', this.getRbfReplacements)
       .get(config.MEMPOOL.API_URL_PREFIX + 'fullrbf/replacements', this.getFullRbfReplacements)
       .post(config.MEMPOOL.API_URL_PREFIX + 'tx/push', this.$postTransactionForm)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'donations', async (req, res) => {
-        try {
-          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/donations`, { responseType: 'stream', timeout: 10000 });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'donations/images/:id', async (req, res) => {
-        try {
-          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/donations/images/${req.params.id}`, {
-            responseType: 'stream', timeout: 10000
-          });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'contributors', async (req, res) => {
-        try {
-          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/contributors`, { responseType: 'stream', timeout: 10000 });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'contributors/images/:id', async (req, res) => {
-        try {
-          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/contributors/images/${req.params.id}`, {
-            responseType: 'stream', timeout: 10000
-          });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'translators', async (req, res) => {
-        try {
-          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/translators`, { responseType: 'stream', timeout: 10000 });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'translators/images/:id', async (req, res) => {
-        try {
-          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/translators/images/${req.params.id}`, {
-            responseType: 'stream', timeout: 10000
-          });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
       .get(config.MEMPOOL.API_URL_PREFIX + 'blocks', this.getBlocks.bind(this))
       .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/:height', this.getBlocks.bind(this))
       .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash', this.getBlock)
@@ -112,6 +58,7 @@ class BitcoinRoutes {
           .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/hex', this.getRawTransaction)
           .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/status', this.getTransactionStatus)
           .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/outspends', this.getTransactionOutspends)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'txs/outspends', this.$getBatchedOutspends)
           .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/header', this.getBlockHeader)
           .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/tip/hash', this.getBlockTipHash)
           .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/raw', this.getRawBlock)
@@ -121,8 +68,10 @@ class BitcoinRoutes {
           .get(config.MEMPOOL.API_URL_PREFIX + 'block-height/:height', this.getBlockHeight)
           .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address', this.getAddress)
           .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address/txs', this.getAddressTransactions)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address/txs/summary', this.getAddressTransactionSummary)
           .get(config.MEMPOOL.API_URL_PREFIX + 'scripthash/:scripthash', this.getScriptHash)
           .get(config.MEMPOOL.API_URL_PREFIX + 'scripthash/:scripthash/txs', this.getScriptHashTransactions)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'scripthash/:scripthash/txs/summary', this.getScriptHashTransactionSummary)
           .get(config.MEMPOOL.API_URL_PREFIX + 'address-prefix/:prefix', this.getAddressPrefix)
           ;
       }
@@ -174,24 +123,20 @@ class BitcoinRoutes {
     res.json(times);
   }
 
-  private async $getBatchedOutspends(req: Request, res: Response) {
-    if (!Array.isArray(req.query.txId)) {
-      res.status(500).send('Not an array');
+  private async $getBatchedOutspends(req: Request, res: Response): Promise<IEsploraApi.Outspend[][] | void> {
+    const txids_csv = req.query.txids;
+    if (!txids_csv || typeof txids_csv !== 'string') {
+      res.status(500).send('Invalid txids format');
       return;
     }
-    if (req.query.txId.length > 50) {
+    const txids = txids_csv.split(',');
+    if (txids.length > 50) {
       res.status(400).send('Too many txids requested');
       return;
     }
-    const txIds: string[] = [];
-    for (const _txId in req.query.txId) {
-      if (typeof req.query.txId[_txId] === 'string') {
-        txIds.push(req.query.txId[_txId].toString());
-      }
-    }
 
     try {
-      const batchedOutspends = await bitcoinApi.$getBatchedOutspends(txIds);
+      const batchedOutspends = await bitcoinApi.$getBatchedOutspends(txids);
       res.json(batchedOutspends);
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
@@ -219,7 +164,7 @@ class BitcoinRoutes {
         return;
       }
 
-      const cpfpInfo = Common.setRelativesAndGetCpfpInfo(tx, mempool.getMempool());
+      const cpfpInfo = calculateCpfp(tx, mempool.getMempool());
 
       res.json(cpfpInfo);
       return;
@@ -251,7 +196,7 @@ class BitcoinRoutes {
 
   private async getTransaction(req: Request, res: Response) {
     try {
-      const transaction = await transactionUtils.$getTransactionExtended(req.params.txId, true);
+      const transaction = await transactionUtils.$getTransactionExtended(req.params.txId, true, false, false, true);
       res.json(transaction);
     } catch (e) {
       let statusCode = 500;
@@ -419,7 +364,7 @@ class BitcoinRoutes {
         const height = req.params.height === undefined ? undefined : parseInt(req.params.height, 10);
         res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
         res.json(await blocks.$getBlocks(height, 15));
-      } else { // Liquid, Bisq
+      } else { // Liquid
         return await this.getLegacyBlocks(req, res);
       }
     } catch (e) {
@@ -429,7 +374,7 @@ class BitcoinRoutes {
 
   private async getBlocksByBulk(req: Request, res: Response) {
     try {
-      if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK) === false) { // Liquid, Bisq - Not implemented
+      if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK) === false) { // Liquid - Not implemented
         return res.status(404).send(`This API is only available for Bitcoin networks`);
       }
       if (config.MEMPOOL.MAX_BLOCKS_BULK_QUERY <= 0) {
@@ -570,6 +515,13 @@ class BitcoinRoutes {
     }
   }
 
+  private async getAddressTransactionSummary(req: Request, res: Response): Promise<void> {
+    if (config.MEMPOOL.BACKEND !== 'esplora') {
+      res.status(405).send('Address summary lookups require mempool/electrs backend.');
+      return;
+    }
+  }
+
   private async getScriptHash(req: Request, res: Response) {
     if (config.MEMPOOL.BACKEND === 'none') {
       res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
@@ -577,7 +529,9 @@ class BitcoinRoutes {
     }
 
     try {
-      const addressData = await bitcoinApi.$getScriptHash(req.params.scripthash);
+      // electrum expects scripthashes in little-endian
+      const electrumScripthash = req.params.scripthash.match(/../g)?.reverse().join('') ?? '';
+      const addressData = await bitcoinApi.$getScriptHash(electrumScripthash);
       res.json(addressData);
     } catch (e) {
       if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
@@ -594,11 +548,13 @@ class BitcoinRoutes {
     }
 
     try {
+      // electrum expects scripthashes in little-endian
+      const electrumScripthash = req.params.scripthash.match(/../g)?.reverse().join('') ?? '';
       let lastTxId: string = '';
       if (req.query.after_txid && typeof req.query.after_txid === 'string') {
         lastTxId = req.query.after_txid;
       }
-      const transactions = await bitcoinApi.$getScriptHashTransactions(req.params.scripthash, lastTxId);
+      const transactions = await bitcoinApi.$getScriptHashTransactions(electrumScripthash, lastTxId);
       res.json(transactions);
     } catch (e) {
       if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
@@ -609,6 +565,13 @@ class BitcoinRoutes {
     }
   }
 
+  private async getScriptHashTransactionSummary(req: Request, res: Response): Promise<void> {
+    if (config.MEMPOOL.BACKEND !== 'esplora') {
+      res.status(405).send('Scripthash summary lookups require mempool/electrs backend.');
+      return;
+    }
+  }
+
   private async getAddressPrefix(req: Request, res: Response) {
     try {
       const blockHash = await bitcoinApi.$getAddressPrefix(req.params.prefix);

backend/src/api/bitcoin/esplora-api.interface.ts

@@ -6,6 +6,7 @@ export namespace IEsploraApi {
     size: number;
     weight: number;
     fee: number;
+    sigops?: number;
     vin: Vin[];
     vout: Vout[];
     status: Status;

backend/src/api/bitcoin/esplora-api.ts

@@ -1,24 +1,30 @@
 import config from '../../config';
-import axios, { AxiosResponse } from 'axios';
+import axios, { AxiosResponse, isAxiosError } from 'axios';
 import http from 'http';
-import { AbstractBitcoinApi } from './bitcoin-api-abstract-factory';
+import { AbstractBitcoinApi, HealthCheckHost } from './bitcoin-api-abstract-factory';
 import { IEsploraApi } from './esplora-api.interface';
 import logger from '../../logger';
+import { Common } from '../common';
 
 interface FailoverHost {
   host: string,
   rtts: number[],
-  rtt: number
+  rtt: number,
+  timedOut?: boolean,
   failures: number,
+  latestHeight?: number,
   socket?: boolean,
   outOfSync?: boolean,
   unreachable?: boolean,
   preferred?: boolean,
+  checked: boolean,
+  lastChecked?: number,
 }
 
 class FailoverRouter {
   activeHost: FailoverHost;
   fallbackHost: FailoverHost;
+  maxHeight: number = 0;
   hosts: FailoverHost[];
   multihost: boolean;
   pollInterval: number = 60000;
@@ -33,6 +39,7 @@ class FailoverRouter {
     this.hosts = (config.ESPLORA.FALLBACK || []).map(domain => {
       return {
         host: domain,
+        checked: false,
         rtts: [],
         rtt: Infinity,
         failures: 0,
@@ -45,6 +52,7 @@ class FailoverRouter {
       failures: 0,
       socket: !!config.ESPLORA.UNIX_SOCKET_PATH,
       preferred: true,
+      checked: false,
     };
     this.fallbackHost = this.activeHost;
     this.hosts.unshift(this.activeHost);
@@ -73,59 +81,93 @@ class FailoverRouter {
       clearTimeout(this.pollTimer);
     }
 
-    const results = await Promise.allSettled(this.hosts.map(async (host) => {
-      if (host.socket) {
-        return this.pollConnection.get<number>('/blocks/tip/height', { socketPath: host.host, timeout: 5000 });
-      } else {
-        return this.pollConnection.get<number>(host.host + '/blocks/tip/height', { timeout: 5000 });
-      }
-    }));
-    const maxHeight = results.reduce((max, result) => Math.max(max, result.status === 'fulfilled' ? result.value?.data || 0 : 0), 0);
+    const start = Date.now();
 
     // update rtts & sync status
-    for (let i = 0; i < results.length; i++) {
-      const host = this.hosts[i];
-      const result = results[i].status === 'fulfilled' ? (results[i] as PromiseFulfilledResult<AxiosResponse<number, any>>).value : null;
-      if (result) {
-        const height = result.data;
-        const rtt = result.config['meta'].rtt;
-        host.rtts.unshift(rtt);
-        host.rtts.slice(0, 5);
-        host.rtt = host.rtts.reduce((acc, l) => acc + l, 0) / host.rtts.length;
-        if (height == null || isNaN(height) || (maxHeight - height > 2)) {
-          host.outOfSync = true;
+    for (const host of this.hosts) {
+      try {
+        const result = await (host.socket
+          ? this.pollConnection.get<number>('/blocks/tip/height', { socketPath: host.host, timeout: config.ESPLORA.FALLBACK_TIMEOUT })
+          : this.pollConnection.get<number>(host.host + '/blocks/tip/height', { timeout: config.ESPLORA.FALLBACK_TIMEOUT })
+        );
+        if (result) {
+          const height = result.data;
+          this.maxHeight = Math.max(height, this.maxHeight);
+          const rtt = result.config['meta'].rtt;
+          host.rtts.unshift(rtt);
+          host.rtts.slice(0, 5);
+          host.rtt = host.rtts.reduce((acc, l) => acc + l, 0) / host.rtts.length;
+          host.latestHeight = height;
+          if (height == null || isNaN(height) || (this.maxHeight - height > 2)) {
+            host.outOfSync = true;
+          } else {
+            host.outOfSync = false;
+          }
+          host.unreachable = false;
         } else {
-          host.outOfSync = false;
+          host.outOfSync = true;
+          host.unreachable = true;
+          host.rtts = [];
+          host.rtt = Infinity;
         }
-        host.unreachable = false;
-      } else {
+        host.timedOut = false;
+      } catch (e) {
+        host.outOfSync = true;
         host.unreachable = true;
+        host.rtts = [];
+        host.rtt = Infinity;
+        if (isAxiosError(e) && (e.code === 'ECONNABORTED' || e.code === 'ETIMEDOUT')) {
+          host.timedOut = true;
+        } else {
+          host.timedOut = false;
+        }
       }
+      host.checked = true;
+      host.lastChecked = Date.now();
+
+      // switch if the current host is out of sync or significantly slower than the next best alternative
+      const rankOrder = this.sortHosts();
+      // switch if the current host is out of sync or significantly slower than the next best alternative
+      if (this.activeHost.outOfSync || this.activeHost.unreachable || (this.activeHost !== rankOrder[0] && rankOrder[0].preferred) || (!this.activeHost.preferred && this.activeHost.rtt > (rankOrder[0].rtt * 2) + 50)) {
+        if (this.activeHost.unreachable) {
+          logger.warn(`🚨🚨🚨 Unable to reach ${this.activeHost.host}, failing over to next best alternative 🚨🚨🚨`);
+        } else if (this.activeHost.outOfSync) {
+          logger.warn(`🚨🚨🚨 ${this.activeHost.host} has fallen behind, failing over to next best alternative 🚨🚨🚨`);
+        } else {
+          logger.debug(`🛠️ ${this.activeHost.host} is no longer the best esplora host 🛠️`);
+        }
+        this.electHost();
+      }
+      await Common.sleep$(50);
     }
 
-    this.sortHosts();
+    const rankOrder = this.updateFallback();
+    logger.debug(`Tomahawk ranking:\n${rankOrder.map((host, index) => this.formatRanking(index, host, this.activeHost, this.maxHeight)).join('\n')}`);
 
-    logger.debug(`Tomahawk ranking: ${this.hosts.map(host => '\navg rtt ' + Math.round(host.rtt).toString().padStart(5, ' ') + ' | reachable? ' + (!host.unreachable || false).toString().padStart(5, ' ') + ' | in sync? ' + (!host.outOfSync || false).toString().padStart(5, ' ') + ` | ${host.host}`).join('')}`);
+    const elapsed = Date.now() - start;
 
-    // switch if the current host is out of sync or significantly slower than the next best alternative
-    if (this.activeHost.outOfSync || this.activeHost.unreachable || (this.activeHost !== this.hosts[0] && this.hosts[0].preferred) || (!this.activeHost.preferred && this.activeHost.rtt > (this.hosts[0].rtt * 2) + 50)) {
-      if (this.activeHost.unreachable) {
-        logger.warn(`Unable to reach ${this.activeHost.host}, failing over to next best alternative`);
-      } else if (this.activeHost.outOfSync) {
-        logger.warn(`${this.activeHost.host} has fallen behind, failing over to next best alternative`);
-      } else {
-        logger.debug(`${this.activeHost.host} is no longer the best esplora host`);
-      }
-      this.electHost();
+    this.pollTimer = setTimeout(() => { this.pollHosts(); }, Math.max(1, this.pollInterval - elapsed));
+  }
+
+  private formatRanking(index: number, host: FailoverHost, active: FailoverHost, maxHeight: number): string {
+    const heightStatus = !host.checked ? '⏳' : (host.outOfSync ? '🚫' : (host.latestHeight && host.latestHeight < maxHeight ? '🟧' : '✅'));
+    return `${host === active ? '⭐️' : '  '} ${host.rtt < Infinity ? Math.round(host.rtt).toString().padStart(5, ' ') + 'ms' : (host.timedOut ? '  ⌛️💥 ' : '    -  ')} ${!host.checked ? '⏳' : (host.unreachable ? '🔥' : '✅')} | block: ${host.latestHeight || '??????'} ${heightStatus} | ${host.host} ${host === active ? '⭐️' : '  '}`;
+  }
+
+  private updateFallback(): FailoverHost[] {
+    const rankOrder = this.sortHosts();
+    if (rankOrder.length > 1 && rankOrder[0] === this.activeHost) {
+      this.fallbackHost = rankOrder[1];
+    } else {
+      this.fallbackHost = rankOrder[0];
     }
-
-    this.pollTimer = setTimeout(() => { this.pollHosts(); }, this.pollInterval);
+    return rankOrder;
   }
 
   // sort hosts by connection quality, and update default fallback
-  private sortHosts(): void {
+  public sortHosts(): FailoverHost[] {
     // sort by connection quality
-    this.hosts.sort((a, b) => {
+    return this.hosts.slice().sort((a, b) => {
       if ((a.unreachable || a.outOfSync) === (b.unreachable || b.outOfSync)) {
         if  (a.preferred === b.preferred) {
           // lower rtt is best
@@ -137,26 +179,21 @@ class FailoverRouter {
         return (a.unreachable || a.outOfSync) ? 1 : -1;
       }
     });
-    if (this.hosts.length > 1 && this.hosts[0] === this.activeHost) {
-      this.fallbackHost = this.hosts[1];
-    } else {
-      this.fallbackHost = this.hosts[0];
-    }
   }
 
   // depose the active host and choose the next best replacement
   private electHost(): void {
     this.activeHost.outOfSync = true;
     this.activeHost.failures = 0;
-    this.sortHosts();
-    this.activeHost = this.hosts[0];
+    const rankOrder = this.sortHosts();
+    this.activeHost = rankOrder[0];
     logger.warn(`Switching esplora host to ${this.activeHost.host}`);
   }
 
   private addFailure(host: FailoverHost): FailoverHost {
     host.failures++;
     if (host.failures > 5 && this.multihost) {
-      logger.warn(`Too many esplora failures on ${this.activeHost.host}, falling back to next best alternative`);
+      logger.warn(`🚨🚨🚨 Too many esplora failures on ${this.activeHost.host}, falling back to next best alternative 🚨🚨🚨`);
       this.electHost();
       return this.activeHost;
     } else {
@@ -168,12 +205,15 @@ class FailoverRouter {
     let axiosConfig;
     let url;
     if (host.socket) {
-      axiosConfig = { socketPath: host.host, timeout: 10000, responseType };
+      axiosConfig = { socketPath: host.host, timeout: config.ESPLORA.REQUEST_TIMEOUT, responseType };
       url = path;
     } else {
-      axiosConfig = { timeout: 10000, responseType };
+      axiosConfig = { timeout: config.ESPLORA.REQUEST_TIMEOUT, responseType };
       url = host.host + path;
     }
+    if (data?.params) {
+      axiosConfig.params = data.params;
+    }
     return (method === 'post'
         ? this.requestConnection.post<T>(url, data, axiosConfig)
         : this.requestConnection.get<T>(url, axiosConfig)
@@ -181,7 +221,8 @@ class FailoverRouter {
       .catch((e) => {
         let fallbackHost = this.fallbackHost;
         if (e?.response?.status !== 404) {
-          logger.warn(`esplora request failed ${e?.response?.status || 500} ${host.host}${path}`);
+          logger.warn(`esplora request failed ${e?.response?.status} ${host.host}${path}`);
+          logger.warn(e instanceof Error ? e.message : e);
           fallbackHost = this.addFailure(host);
         }
         if (retry && e?.code === 'ECONNREFUSED' && this.multihost) {
@@ -193,8 +234,8 @@ class FailoverRouter {
       });
   }
 
-  public async $get<T>(path, responseType = 'json'): Promise<T> {
-    return this.$query<T>('get', path, null, responseType);
+  public async $get<T>(path, responseType = 'json', params: any = null): Promise<T> {
+    return this.$query<T>('get', path, params ? { params } : null, responseType);
   }
 
   public async $post<T>(path, data: any, responseType = 'json'): Promise<T> {
@@ -213,12 +254,16 @@ class ElectrsApi implements AbstractBitcoinApi {
     return this.failoverRouter.$get<IEsploraApi.Transaction>('/tx/' + txId);
   }
 
-  async $getMempoolTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
-    return this.failoverRouter.$post<IEsploraApi.Transaction[]>('/mempool/txs', txids, 'json');
+  async $getRawTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
+    return this.failoverRouter.$post<IEsploraApi.Transaction[]>('/internal/txs', txids, 'json');
   }
 
-  async $getAllMempoolTransactions(lastSeenTxid?: string): Promise<IEsploraApi.Transaction[]> {
-    return this.failoverRouter.$get<IEsploraApi.Transaction[]>('/mempool/txs' + (lastSeenTxid ? '/' + lastSeenTxid : ''));
+  async $getMempoolTransactions(txids: string[]): Promise<IEsploraApi.Transaction[]> {
+    return this.failoverRouter.$post<IEsploraApi.Transaction[]>('/internal/mempool/txs', txids, 'json');
+  }
+
+  async $getAllMempoolTransactions(lastSeenTxid?: string, max_txs?: number): Promise<IEsploraApi.Transaction[]> {
+    return this.failoverRouter.$get<IEsploraApi.Transaction[]>('/internal/mempool/txs' + (lastSeenTxid ? '/' + lastSeenTxid : ''), 'json', max_txs ? { max_txs } : null);
   }
 
   $getTransactionHex(txId: string): Promise<string> {
@@ -238,7 +283,7 @@ class ElectrsApi implements AbstractBitcoinApi {
   }
 
   $getTxsForBlock(hash: string): Promise<IEsploraApi.Transaction[]> {
-    return this.failoverRouter.$get<IEsploraApi.Transaction[]>('/block/' + hash + '/txs');
+    return this.failoverRouter.$get<IEsploraApi.Transaction[]>('/internal/block/' + hash + '/txs');
   }
 
   $getBlockHash(height: number): Promise<string> {
@@ -290,18 +335,39 @@ class ElectrsApi implements AbstractBitcoinApi {
     return this.failoverRouter.$get<IEsploraApi.Outspend[]>('/tx/' + txId + '/outspends');
   }
 
-  async $getBatchedOutspends(txId: string[]): Promise<IEsploraApi.Outspend[][]> {
-    const outspends: IEsploraApi.Outspend[][] = [];
-    for (const tx of txId) {
-      const outspend = await this.$getOutspends(tx);
-      outspends.push(outspend);
-    }
-    return outspends;
+  async $getBatchedOutspends(txids: string[]): Promise<IEsploraApi.Outspend[][]> {
+    throw new Error('Method not implemented.');
+  }
+
+  async $getBatchedOutspendsInternal(txids: string[]): Promise<IEsploraApi.Outspend[][]> {
+    return this.failoverRouter.$post<IEsploraApi.Outspend[][]>('/internal/txs/outspends/by-txid', txids, 'json');
+  }
+
+  async $getOutSpendsByOutpoint(outpoints: { txid: string, vout: number }[]): Promise<IEsploraApi.Outspend[]> {
+    return this.failoverRouter.$post<IEsploraApi.Outspend[]>('/internal/txs/outspends/by-outpoint', outpoints.map(out => `${out.txid}:${out.vout}`), 'json');
   }
 
   public startHealthChecks(): void {
     this.failoverRouter.startHealthChecks();
   }
+
+  public getHealthStatus(): HealthCheckHost[] {
+    if (config.MEMPOOL.OFFICIAL) {
+      return this.failoverRouter.sortHosts().map(host => ({
+        host: host.host,
+        active: host === this.failoverRouter.activeHost,
+        rtt: host.rtt,
+        latestHeight: host.latestHeight || 0,
+        socket: !!host.socket,
+        outOfSync: !!host.outOfSync,
+        unreachable: !!host.unreachable,
+        checked: !!host.checked,
+        lastChecked: host.lastChecked || 0,
+      }));
+    } else {
+      return [];
+    }
+  }
 }
 
 export default ElectrsApi;

backend/src/api/blocks.ts

@@ -2,7 +2,7 @@ import config from '../config';
 import bitcoinApi, { bitcoinCoreApi } from './bitcoin/bitcoin-api-factory';
 import logger from '../logger';
 import memPool from './mempool';
-import { BlockExtended, BlockExtension, BlockSummary, PoolTag, TransactionExtended, TransactionStripped, TransactionMinerInfo, CpfpSummary, MempoolTransactionExtended } from '../mempool.interfaces';
+import { BlockExtended, BlockExtension, BlockSummary, PoolTag, TransactionExtended, TransactionMinerInfo, CpfpSummary, MempoolTransactionExtended, TransactionClassified, BlockAudit } from '../mempool.interfaces';
 import { Common } from './common';
 import diskCache from './disk-cache';
 import transactionUtils from './transaction-utils';
@@ -37,8 +37,10 @@ class Blocks {
   private currentBits = 0;
   private lastDifficultyAdjustmentTime = 0;
   private previousDifficultyRetarget = 0;
+  private quarterEpochBlockTime: number | null = null;
   private newBlockCallbacks: ((block: BlockExtended, txIds: string[], transactions: TransactionExtended[]) => void)[] = [];
   private newAsyncBlockCallbacks: ((block: BlockExtended, txIds: string[], transactions: MempoolTransactionExtended[]) => Promise<void>)[] = [];
+  private classifyingBlocks: boolean = false;
 
   private mainLoopTimeout: number = 120000;
 
@@ -81,6 +83,7 @@ class Blocks {
   private async $getTransactionsExtended(
     blockHash: string,
     blockHeight: number,
+    blockTime: number,
     onlyCoinbase: boolean,
     txIds: string[] | null = null,
     quiet: boolean = false,
@@ -101,6 +104,12 @@ class Blocks {
     if (!onlyCoinbase) {
       for (const txid of txIds) {
         if (mempool[txid]) {
+          mempool[txid].status = {
+            confirmed: true,
+            block_height: blockHeight,
+            block_hash: blockHash,
+            block_time: blockTime,
+          };
           transactionMap[txid] = mempool[txid];
           foundInMempool++;
           totalFound++;
@@ -194,7 +203,8 @@ class Blocks {
         txid: tx.txid,
         vsize: tx.weight / 4,
         fee: tx.fee ? Math.round(tx.fee * 100000000) : 0,
-        value: Math.round(tx.vout.reduce((acc, vout) => acc + (vout.value ? vout.value : 0), 0) * 100000000)
+        value: Math.round(tx.vout.reduce((acc, vout) => acc + (vout.value ? vout.value : 0), 0) * 100000000),
+        flags: 0,
       };
     });
 
@@ -207,7 +217,7 @@ class Blocks {
   public summarizeBlockTransactions(hash: string, transactions: TransactionExtended[]): BlockSummary {
     return {
       id: hash,
-      transactions: Common.stripTransactions(transactions),
+      transactions: Common.classifyTransactions(transactions),
     };
   }
 
@@ -443,7 +453,9 @@ class Blocks {
         if (config.MEMPOOL.BACKEND === 'esplora') {
           const txs = (await bitcoinApi.$getTxsForBlock(block.hash)).map(tx => transactionUtils.extendTransaction(tx));
           const cpfpSummary = await this.$indexCPFP(block.hash, block.height, txs);
-          await this.$getStrippedBlockTransactions(block.hash, true, true, cpfpSummary, block.height); // This will index the block summary
+          if (cpfpSummary) {
+            await this.$getStrippedBlockTransactions(block.hash, true, true, cpfpSummary, block.height); // This will index the block summary
+          }
         } else {
           await this.$getStrippedBlockTransactions(block.hash, true, true); // This will index the block summary
         }
@@ -553,6 +565,130 @@ class Blocks {
     logger.debug(`Indexing block audit details completed`);
   }
 
+  /**
+   * [INDEXING] Index transaction classification flags for Goggles
+   */
+  public async $classifyBlocks(): Promise<void> {
+    if (this.classifyingBlocks) {
+      return;
+    }
+    this.classifyingBlocks = true;
+
+    // classification requires an esplora backend
+    if (!Common.gogglesIndexingEnabled() || config.MEMPOOL.BACKEND !== 'esplora') {
+      return;
+    }
+
+    const blockchainInfo = await bitcoinClient.getBlockchainInfo();
+    const currentBlockHeight = blockchainInfo.blocks;
+
+    const unclassifiedBlocksList = await BlocksSummariesRepository.$getSummariesWithVersion(0);
+    const unclassifiedTemplatesList = await BlocksSummariesRepository.$getTemplatesWithVersion(0);
+
+    // nothing to do
+    if (!unclassifiedBlocksList?.length && !unclassifiedTemplatesList?.length) {
+      return;
+    }
+
+    let timer = Date.now();
+    let indexedThisRun = 0;
+    let indexedTotal = 0;
+
+    const minHeight = Math.min(
+      unclassifiedBlocksList[unclassifiedBlocksList.length - 1]?.height ?? Infinity,
+      unclassifiedTemplatesList[unclassifiedTemplatesList.length - 1]?.height ?? Infinity,
+    );
+    const numToIndex = Math.max(
+      unclassifiedBlocksList.length,
+      unclassifiedTemplatesList.length,
+    );
+
+    const unclassifiedBlocks = {};
+    const unclassifiedTemplates = {};
+    for (const block of unclassifiedBlocksList) {
+      unclassifiedBlocks[block.height] = block.id;
+    }
+    for (const template of unclassifiedTemplatesList) {
+      unclassifiedTemplates[template.height] = template.id;
+    }
+
+    logger.debug(`Classifying blocks and templates from #${currentBlockHeight} to #${minHeight}`, logger.tags.goggles);
+
+    for (let height = currentBlockHeight; height >= 0; height--) {
+      try {
+        let txs: TransactionExtended[] | null = null;
+        if (unclassifiedBlocks[height]) {
+          const blockHash = unclassifiedBlocks[height];
+          // fetch transactions
+          txs = (await bitcoinApi.$getTxsForBlock(blockHash)).map(tx => transactionUtils.extendTransaction(tx)) || [];
+          // add CPFP
+          const cpfpSummary = Common.calculateCpfp(height, txs, true);
+          // classify
+          const { transactions: classifiedTxs } = this.summarizeBlockTransactions(blockHash, cpfpSummary.transactions);
+          await BlocksSummariesRepository.$saveTransactions(height, blockHash, classifiedTxs, 1);
+          await Common.sleep$(250);
+        }
+        if (unclassifiedTemplates[height]) {
+          // classify template
+          const blockHash = unclassifiedTemplates[height];
+          const template = await BlocksSummariesRepository.$getTemplate(blockHash);
+          const alreadyClassified = template?.transactions?.reduce((classified, tx) => (classified || tx.flags > 0), false);
+          let classifiedTemplate = template?.transactions || [];
+          if (!alreadyClassified) {
+            const templateTxs: (TransactionExtended | TransactionClassified)[] = [];
+            const blockTxMap: { [txid: string]: TransactionExtended } = {};
+            for (const tx of (txs || [])) {
+              blockTxMap[tx.txid] = tx;
+            }
+            for (const templateTx of (template?.transactions || [])) {
+              let tx: TransactionExtended | null = blockTxMap[templateTx.txid];
+              if (!tx) {
+                try {
+                  tx = await transactionUtils.$getTransactionExtended(templateTx.txid, false, true, false);
+                } catch (e) {
+                  // transaction probably not found
+                }
+              }
+              templateTxs.push(tx || templateTx);
+            }
+            const cpfpSummary = Common.calculateCpfp(height, templateTxs?.filter(tx => tx['effectiveFeePerVsize'] != null) as TransactionExtended[], true);
+            // classify
+            const { transactions: classifiedTxs } = this.summarizeBlockTransactions(blockHash, cpfpSummary.transactions);
+            const classifiedTxMap: { [txid: string]: TransactionClassified } = {};
+            for (const tx of classifiedTxs) {
+              classifiedTxMap[tx.txid] = tx;
+            }
+            classifiedTemplate = classifiedTemplate.map(tx => {
+              if (classifiedTxMap[tx.txid]) {
+                tx.flags = classifiedTxMap[tx.txid].flags || 0;
+              }
+              return tx;
+            });
+          }
+          await BlocksSummariesRepository.$saveTemplate({ height, template: { id: blockHash, transactions: classifiedTemplate }, version: 1 });
+          await Common.sleep$(250);
+        }
+      } catch (e) {
+        logger.warn(`Failed to classify template or block summary at ${height}`, logger.tags.goggles);
+      }
+
+      // timing & logging
+      if (unclassifiedBlocks[height] || unclassifiedTemplates[height]) {
+        indexedThisRun++;
+        indexedTotal++;
+      }
+      const elapsedSeconds = (Date.now() - timer) / 1000;
+      if (elapsedSeconds > 5) {
+        const perSecond = indexedThisRun / elapsedSeconds;
+        logger.debug(`Classified #${height}: ${indexedTotal} / ${numToIndex} blocks (${perSecond.toFixed(1)}/s)`);
+        timer = Date.now();
+        indexedThisRun = 0;
+      }
+    }
+
+    this.classifyingBlocks = false;
+  }
+
   /**
    * [INDEXING] Index all blocks metadata for the mining dashboard
    */
@@ -608,7 +744,7 @@ class Blocks {
           }
           const blockHash = await bitcoinApi.$getBlockHash(blockHeight);
           const block: IEsploraApi.Block = await bitcoinApi.$getBlock(blockHash);
-          const transactions = await this.$getTransactionsExtended(blockHash, block.height, true, null, true);
+          const transactions = await this.$getTransactionsExtended(blockHash, block.height, block.timestamp, true, null, true);
           const blockExtended = await this.$getBlockExtended(block, transactions);
 
           newlyIndexed++;
@@ -648,6 +784,16 @@ class Blocks {
     } else {
       this.currentBlockHeight = this.blocks[this.blocks.length - 1].height;
     }
+    if (this.currentBlockHeight >= 503) {
+      try {
+        const quarterEpochBlockHash = await bitcoinApi.$getBlockHash(this.currentBlockHeight - 503);
+        const quarterEpochBlock = await bitcoinApi.$getBlock(quarterEpochBlockHash);
+        this.quarterEpochBlockTime = quarterEpochBlock?.timestamp;
+      } catch (e) {
+        this.quarterEpochBlockTime = null;
+        logger.warn('failed to update last epoch block time: ' + (e instanceof Error ? e.message : e));
+      }
+    }
 
     if (blockHeightTip - this.currentBlockHeight > config.MEMPOOL.INITIAL_BLOCKS_AMOUNT * 2) {
       logger.info(`${blockHeightTip - this.currentBlockHeight} blocks since tip. Fast forwarding to the ${config.MEMPOOL.INITIAL_BLOCKS_AMOUNT} recent blocks`);
@@ -701,7 +847,7 @@ class Blocks {
       const verboseBlock = await bitcoinClient.getBlock(blockHash, 2);
       const block = BitcoinApi.convertBlock(verboseBlock);
       const txIds: string[] = verboseBlock.tx.map(tx => tx.txid);
-      const transactions = await this.$getTransactionsExtended(blockHash, block.height, false, txIds, false, true) as MempoolTransactionExtended[];
+      const transactions = await this.$getTransactionsExtended(blockHash, block.height, block.timestamp, false, txIds, false, true) as MempoolTransactionExtended[];
 
       // fill in missing transaction fee data from verboseBlock
       for (let i = 0; i < transactions.length; i++) {
@@ -754,8 +900,13 @@ class Blocks {
         this.updateTimerProgress(timer, `saved ${this.currentBlockHeight} to database`);
 
         if (!fastForwarded) {
-          const lastestPriceId = await PricesRepository.$getLatestPriceId();
-          this.updateTimerProgress(timer, `got latest price id ${this.currentBlockHeight}`);
+          let lastestPriceId;
+          try {
+            lastestPriceId = await PricesRepository.$getLatestPriceId();
+            this.updateTimerProgress(timer, `got latest price id ${this.currentBlockHeight}`);
+          } catch (e) {
+            logger.debug('failed to fetch latest price id from db: ' + (e instanceof Error ? e.message : e));
+          }
           if (priceUpdater.historyInserted === true && lastestPriceId !== null) {
             await blocksRepository.$saveBlockPrices([{
               height: blockExtended.height,
@@ -764,9 +915,7 @@ class Blocks {
             this.updateTimerProgress(timer, `saved prices for ${this.currentBlockHeight}`);
           } else {
             logger.debug(`Cannot save block price for ${blockExtended.height} because the price updater hasnt completed yet. Trying again in 10 seconds.`, logger.tags.mining);
-            setTimeout(() => {
-              indexer.runSingleTask('blocksPrices');
-            }, 10000);
+            indexer.scheduleSingleTask('blocksPrices', 10000);
           }
 
           // Save blocks summary for visualization if it's enabled
@@ -867,11 +1016,11 @@ class Blocks {
     return state;
   }
 
-  private updateTimerProgress(state, msg) {
+  private updateTimerProgress(state, msg): void {
     state.progress = msg;
   }
 
-  private clearTimer(state) {
+  private clearTimer(state): void {
     if (state.timer) {
       clearTimeout(state.timer);
     }
@@ -890,7 +1039,7 @@ class Blocks {
 
     const blockHash = await bitcoinApi.$getBlockHash(height);
     const block: IEsploraApi.Block = await bitcoinApi.$getBlock(blockHash);
-    const transactions = await this.$getTransactionsExtended(blockHash, block.height, true);
+    const transactions = await this.$getTransactionsExtended(blockHash, block.height, block.timestamp, true);
     const blockExtended = await this.$getBlockExtended(block, transactions);
 
     if (Common.indexingEnabled()) {
@@ -902,7 +1051,7 @@ class Blocks {
 
   public async $indexStaleBlock(hash: string): Promise<BlockExtended> {
     const block: IEsploraApi.Block = await bitcoinApi.$getBlock(hash);
-    const transactions = await this.$getTransactionsExtended(hash, block.height, true);
+    const transactions = await this.$getTransactionsExtended(hash, block.height, block.timestamp, true);
     const blockExtended = await this.$getBlockExtended(block, transactions);
 
     blockExtended.canonical = await bitcoinApi.$getBlockHash(block.height);
@@ -935,7 +1084,7 @@ class Blocks {
   }
 
   public async $getStrippedBlockTransactions(hash: string, skipMemoryCache = false,
-    skipDBLookup = false, cpfpSummary?: CpfpSummary, blockHeight?: number): Promise<TransactionStripped[]>
+    skipDBLookup = false, cpfpSummary?: CpfpSummary, blockHeight?: number): Promise<TransactionClassified[]>
   {
     if (skipMemoryCache === false) {
       // Check the memory cache
@@ -955,23 +1104,33 @@ class Blocks {
 
     let height = blockHeight;
     let summary: BlockSummary;
+    let summaryVersion = 0;
     if (cpfpSummary && !Common.isLiquid()) {
       summary = {
         id: hash,
         transactions: cpfpSummary.transactions.map(tx => {
+          let flags: number = 0;
+          try {
+            flags = tx.flags || Common.getTransactionFlags(tx);
+          } catch (e) {
+            logger.warn('Failed to classify transaction: ' + (e instanceof Error ? e.message : e));
+          }
           return {
             txid: tx.txid,
             fee: tx.fee || 0,
             vsize: tx.vsize,
             value: Math.round(tx.vout.reduce((acc, vout) => acc + (vout.value ? vout.value : 0), 0)),
-            rate: tx.effectiveFeePerVsize
+            rate: tx.effectiveFeePerVsize,
+            flags: flags,
           };
         }),
       };
+      summaryVersion = 1;
     } else {
       if (config.MEMPOOL.BACKEND === 'esplora') {
         const txs = (await bitcoinApi.$getTxsForBlock(hash)).map(tx => transactionUtils.extendTransaction(tx));
         summary = this.summarizeBlockTransactions(hash, txs);
+        summaryVersion = 1;
       } else {
         // Call Core RPC
         const block = await bitcoinClient.getBlock(hash, 2);
@@ -986,7 +1145,7 @@ class Blocks {
 
     // Index the response if needed
     if (Common.blocksSummariesIndexingEnabled() === true) {
-      await BlocksSummariesRepository.$saveTransactions(height, hash, summary.transactions);
+      await BlocksSummariesRepository.$saveTransactions(height, hash, summary.transactions, summaryVersion);
     }
 
     return summary.transactions;
@@ -1102,16 +1261,18 @@ class Blocks {
         if (cleanBlock.fee_amt_percentiles === null) {
 
           let summary;
+          let summaryVersion = 0;
           if (config.MEMPOOL.BACKEND === 'esplora') {
             const txs = (await bitcoinApi.$getTxsForBlock(cleanBlock.hash)).map(tx => transactionUtils.extendTransaction(tx));
             summary = this.summarizeBlockTransactions(cleanBlock.hash, txs);
+            summaryVersion = 1;
           } else {
             // Call Core RPC
             const block = await bitcoinClient.getBlock(cleanBlock.hash, 2);
             summary = this.summarizeBlock(block);
           }
 
-          await BlocksSummariesRepository.$saveTransactions(cleanBlock.height, cleanBlock.hash, summary.transactions);
+          await BlocksSummariesRepository.$saveTransactions(cleanBlock.height, cleanBlock.hash, summary.transactions, summaryVersion);
           cleanBlock.fee_amt_percentiles = await BlocksSummariesRepository.$getFeePercentilesByBlockId(cleanBlock.hash);
         }
         if (cleanBlock.fee_amt_percentiles !== null) {
@@ -1150,7 +1311,7 @@ class Blocks {
     return blocks;
   }
 
-  public async $getBlockAuditSummary(hash: string): Promise<any> {
+  public async $getBlockAuditSummary(hash: string): Promise<BlockAudit | null> {
     if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) {
       return BlocksAuditsRepository.$getBlockAudit(hash);
     } else {
@@ -1166,11 +1327,15 @@ class Blocks {
     return this.previousDifficultyRetarget;
   }
 
+  public getQuarterEpochBlockTime(): number | null {
+    return this.quarterEpochBlockTime;
+  }
+
   public getCurrentBlockHeight(): number {
     return this.currentBlockHeight;
   }
 
-  public async $indexCPFP(hash: string, height: number, txs?: TransactionExtended[]): Promise<CpfpSummary> {
+  public async $indexCPFP(hash: string, height: number, txs?: TransactionExtended[]): Promise<CpfpSummary | null> {
     let transactions = txs;
     if (!transactions) {
       if (config.MEMPOOL.BACKEND === 'esplora') {
@@ -1185,14 +1350,19 @@ class Blocks {
       }
     }
 
-    const summary = Common.calculateCpfp(height, transactions as TransactionExtended[]);
+    if (transactions?.length != null) {
+      const summary = Common.calculateCpfp(height, transactions as TransactionExtended[]);
 
-    await this.$saveCpfp(hash, height, summary);
+      await this.$saveCpfp(hash, height, summary);
 
-    const effectiveFeeStats = Common.calcEffectiveFeeStatistics(summary.transactions);
-    await blocksRepository.$saveEffectiveFeeStats(hash, effectiveFeeStats);
+      const effectiveFeeStats = Common.calcEffectiveFeeStatistics(summary.transactions);
+      await blocksRepository.$saveEffectiveFeeStats(hash, effectiveFeeStats);
 
-    return summary;
+      return summary;
+    } else {
+      logger.err(`Cannot index CPFP for block ${height} - missing transaction data`);
+      return null;
+    }
   }
 
   public async $saveCpfp(hash: string, height: number, cpfpSummary: CpfpSummary): Promise<void> {

backend/src/api/common.ts

@@ -1,9 +1,30 @@
 import * as bitcoinjs from 'bitcoinjs-lib';
 import { Request } from 'express';
-import { Ancestor, CpfpInfo, CpfpSummary, CpfpCluster, EffectiveFeeStats, MempoolBlockWithTransactions, TransactionExtended, MempoolTransactionExtended, TransactionStripped, WorkingEffectiveFeeStats } from '../mempool.interfaces';
+import { CpfpInfo, CpfpSummary, CpfpCluster, EffectiveFeeStats, MempoolBlockWithTransactions, TransactionExtended, MempoolTransactionExtended, TransactionStripped, WorkingEffectiveFeeStats, TransactionClassified, TransactionFlags } from '../mempool.interfaces';
 import config from '../config';
 import { NodeSocket } from '../repositories/NodesSocketsRepository';
 import { isIP } from 'net';
+import transactionUtils from './transaction-utils';
+import { isPoint } from '../utils/secp256k1';
+import logger from '../logger';
+import { getVarIntLength, opcodes, parseMultisigScript } from '../utils/bitcoin-script';
+
+// Bitcoin Core default policy settings
+const TX_MAX_STANDARD_VERSION = 2;
+const MAX_STANDARD_TX_WEIGHT = 400_000;
+const MAX_BLOCK_SIGOPS_COST = 80_000;
+const MAX_STANDARD_TX_SIGOPS_COST = (MAX_BLOCK_SIGOPS_COST / 5);
+const MIN_STANDARD_TX_NONWITNESS_SIZE = 65;
+const MAX_P2SH_SIGOPS = 15;
+const MAX_STANDARD_P2WSH_STACK_ITEMS = 100;
+const MAX_STANDARD_P2WSH_STACK_ITEM_SIZE = 80;
+const MAX_STANDARD_TAPSCRIPT_STACK_ITEM_SIZE = 80;
+const MAX_STANDARD_P2WSH_SCRIPT_SIZE = 3600;
+const MAX_STANDARD_SCRIPTSIG_SIZE = 1650;
+const DUST_RELAY_TX_FEE = 3;
+const MAX_OP_RETURN_RELAY = 83;
+const DEFAULT_PERMIT_BAREMULTISIG = true;
+
 export class Common {
   static nativeAssetId = config.MEMPOOL.NETWORK === 'liquidtestnet' ?
     '144c654344aa716d6f3abcc1ca90e5641e4e2a7f633bc09fe3baf64585819a49'
@@ -138,6 +159,391 @@ export class Common {
     return matches;
   }
 
+  static setSchnorrSighashFlags(flags: bigint, witness: string[]): bigint {
+    // no witness items
+    if (!witness?.length) {
+      return flags;
+    }
+    const hasAnnex = witness.length > 1 && witness[witness.length - 1].startsWith('50');
+    if (witness?.length === (hasAnnex ? 2 : 1)) {
+      // keypath spend, signature is the only witness item
+      if (witness[0].length === 130) {
+        flags |= this.setSighashFlags(flags, witness[0]);
+      } else {
+        flags |= TransactionFlags.sighash_default;
+      }
+    } else {
+      // scriptpath spend, all items except for the script, control block and annex could be signatures
+      for (let i = 0; i < witness.length - (hasAnnex ? 3 : 2); i++) {
+        // handle probable signatures
+        if (witness[i].length === 130) {
+          flags |= this.setSighashFlags(flags, witness[i]);
+        } else if (witness[i].length === 128) {
+          flags |= TransactionFlags.sighash_default;
+        }
+      }
+    }
+    return flags;
+  }
+
+  static isDERSig(w: string): boolean {
+    // heuristic to detect probable DER signatures
+    return (w.length >= 18
+      && w.startsWith('30') // minimum DER signature length is 8 bytes + sighash flag (see https://mempool.space/testnet/tx/c6c232a36395fa338da458b86ff1327395a9afc28c5d2daa4273e410089fd433)
+      && ['01', '02', '03', '81', '82', '83'].includes(w.slice(-2)) // signature must end with a valid sighash flag
+      && (w.length === (2 * parseInt(w.slice(2, 4), 16)) + 6) // second byte encodes the combined length of the R and S components
+    );
+  }
+
+  /**
+   * Validates most standardness rules
+   *
+   * returns true early if any standardness rule is violated, otherwise false
+   * (except for non-mandatory-script-verify-flag and p2sh script evaluation rules which are *not* enforced)
+   */
+  static isNonStandard(tx: TransactionExtended): boolean {
+    // version
+    if (tx.version > TX_MAX_STANDARD_VERSION) {
+      return true;
+    }
+
+    // tx-size
+    if (tx.weight > MAX_STANDARD_TX_WEIGHT) {
+      return true;
+    }
+
+    // tx-size-small
+    if (this.getNonWitnessSize(tx) < MIN_STANDARD_TX_NONWITNESS_SIZE) {
+      return true;
+    }
+
+    // bad-txns-too-many-sigops
+    if (tx.sigops && tx.sigops > MAX_STANDARD_TX_SIGOPS_COST) {
+      return true;
+    }
+
+    // input validation
+    for (const vin of tx.vin) {
+      if (vin.is_coinbase) {
+        // standardness rules don't apply to coinbase transactions
+        return false;
+      }
+      // scriptsig-size
+      if ((vin.scriptsig.length / 2) > MAX_STANDARD_SCRIPTSIG_SIZE) {
+        return true;
+      }
+      // scriptsig-not-pushonly
+      if (vin.scriptsig_asm) {
+        for (const op of vin.scriptsig_asm.split(' ')) {
+          if (opcodes[op] && opcodes[op] > opcodes['OP_16']) {
+            return true;
+          }
+        }
+      }
+      // bad-txns-nonstandard-inputs
+      if (vin.prevout?.scriptpubkey_type === 'p2sh') {
+        // TODO: evaluate script (https://github.com/bitcoin/bitcoin/blob/1ac627c485a43e50a9a49baddce186ee3ad4daad/src/policy/policy.cpp#L177)
+        // countScriptSigops returns the witness-scaled sigops, so divide by 4 before comparison with MAX_P2SH_SIGOPS
+        const sigops = (transactionUtils.countScriptSigops(vin.inner_redeemscript_asm) / 4);
+        if (sigops > MAX_P2SH_SIGOPS) {
+          return true;
+        }
+      } else if (['unknown', 'provably_unspendable', 'empty'].includes(vin.prevout?.scriptpubkey_type || '')) {
+        return true;
+      }
+      // TODO: bad-witness-nonstandard
+    }
+
+    // output validation
+    let opreturnCount = 0;
+    for (const vout of tx.vout) {
+      // scriptpubkey
+      if (['unknown', 'provably_unspendable', 'empty'].includes(vout.scriptpubkey_type)) {
+        // (non-standard output type)
+        return true;
+      } else if (vout.scriptpubkey_type === 'multisig') {
+        if (!DEFAULT_PERMIT_BAREMULTISIG) {
+          // bare-multisig
+          return true;
+        }
+        const mOfN = parseMultisigScript(vout.scriptpubkey_asm);
+        if (!mOfN || mOfN.n < 1 || mOfN.n > 3 || mOfN.m < 1 || mOfN.m > mOfN.n) {
+          // (non-standard bare multisig threshold)
+          return true;
+        }
+      } else if (vout.scriptpubkey_type === 'op_return') {
+        opreturnCount++;
+        if ((vout.scriptpubkey.length / 2) > MAX_OP_RETURN_RELAY) {
+          // over default datacarrier limit
+          return true;
+        }
+      }
+      // dust
+      // (we could probably hardcode this for the different output types...)
+      if (vout.scriptpubkey_type !== 'op_return') {
+        let dustSize = (vout.scriptpubkey.length / 2);
+        // add varint length overhead
+        dustSize += getVarIntLength(dustSize);
+        // add value size
+        dustSize += 8;
+        if (['v0_p2wpkh', 'v0_p2wsh', 'v1_p2tr'].includes(vout.scriptpubkey_type)) {
+          dustSize += 67;
+        } else {
+          dustSize += 148;
+        }
+        if (vout.value < (dustSize * DUST_RELAY_TX_FEE)) {
+          // under minimum output size
+          return true;
+        }
+      }
+    }
+
+    // multi-op-return
+    if (opreturnCount > 1) {
+      return true;
+    }
+
+    // TODO: non-mandatory-script-verify-flag
+
+    return false;
+  }
+
+  static getNonWitnessSize(tx: TransactionExtended): number {
+    let weight = tx.weight;
+    let hasWitness = false;
+    for (const vin of tx.vin) {
+      if (vin.witness?.length) {
+        hasWitness = true;
+        // witness count
+        weight -= getVarIntLength(vin.witness.length);
+        for (const witness of vin.witness) {
+          // witness item size + content
+          weight -= getVarIntLength(witness.length / 2) + (witness.length / 2);
+        }
+      }
+    }
+    if (hasWitness) {
+      // marker & segwit flag
+      weight -= 2;
+    }
+    return Math.ceil(weight / 4);
+  }
+
+  static setSegwitSighashFlags(flags: bigint, witness: string[]): bigint {
+    for (const w of witness) {
+      if (this.isDERSig(w)) {
+        flags |= this.setSighashFlags(flags, w);
+      }
+    }
+    return flags;
+  }
+
+  static setLegacySighashFlags(flags: bigint, scriptsig_asm: string): bigint {
+    for (const item of scriptsig_asm.split(' ')) {
+      // skip op_codes
+      if (item.startsWith('OP_')) {
+        continue;
+      }
+      // check pushed data
+      if (this.isDERSig(item)) {
+        flags |= this.setSighashFlags(flags, item);
+      }
+    }
+    return flags;
+  }
+
+  static setSighashFlags(flags: bigint, signature: string): bigint {
+    switch(signature.slice(-2)) {
+      case '01': return flags | TransactionFlags.sighash_all;
+      case '02': return flags | TransactionFlags.sighash_none;
+      case '03': return flags | TransactionFlags.sighash_single;
+      case '81': return flags | TransactionFlags.sighash_all | TransactionFlags.sighash_acp;
+      case '82': return flags | TransactionFlags.sighash_none | TransactionFlags.sighash_acp;
+      case '83': return flags | TransactionFlags.sighash_single | TransactionFlags.sighash_acp;
+      default: return flags | TransactionFlags.sighash_default; // taproot only
+    }
+  }
+
+  static isBurnKey(pubkey: string): boolean {
+    return [
+      '022222222222222222222222222222222222222222222222222222222222222222',
+      '033333333333333333333333333333333333333333333333333333333333333333',
+      '020202020202020202020202020202020202020202020202020202020202020202',
+      '030303030303030303030303030303030303030303030303030303030303030303',
+    ].includes(pubkey);
+  }
+
+  static getTransactionFlags(tx: TransactionExtended): number {
+    let flags = tx.flags ? BigInt(tx.flags) : 0n;
+
+    // Update variable flags (CPFP, RBF)
+    if (tx.ancestors?.length) {
+      flags |= TransactionFlags.cpfp_child;
+    }
+    if (tx.descendants?.length) {
+      flags |= TransactionFlags.cpfp_parent;
+    }
+    if (tx.replacement) {
+      flags |= TransactionFlags.replacement;
+    }
+
+    // Already processed static flags, no need to do it again
+    if (tx.flags) {
+      return Number(flags);
+    }
+
+    // Process static flags
+    if (tx.version === 1) {
+      flags |= TransactionFlags.v1;
+    } else if (tx.version === 2) {
+      flags |= TransactionFlags.v2;
+    } else if (tx.version === 3) {
+      flags |= TransactionFlags.v3;
+    }
+    const reusedInputAddresses: { [address: string ]: number } = {};
+    const reusedOutputAddresses: { [address: string ]: number } = {};
+    const inValues = {};
+    const outValues = {};
+    let rbf = false;
+    for (const vin of tx.vin) {
+      if (vin.sequence < 0xfffffffe) {
+        rbf = true;
+      }
+      switch (vin.prevout?.scriptpubkey_type) {
+        case 'p2pk': flags |= TransactionFlags.p2pk; break;
+        case 'multisig': flags |= TransactionFlags.p2ms; break;
+        case 'p2pkh': flags |= TransactionFlags.p2pkh; break;
+        case 'p2sh': flags |= TransactionFlags.p2sh; break;
+        case 'v0_p2wpkh': flags |= TransactionFlags.p2wpkh; break;
+        case 'v0_p2wsh': flags |= TransactionFlags.p2wsh; break;
+        case 'v1_p2tr': {
+          if (!vin.witness?.length) {
+            throw new Error('Taproot input missing witness data');
+          }
+          flags |= TransactionFlags.p2tr;
+          // in taproot, if the last witness item begins with 0x50, it's an annex
+          const hasAnnex = vin.witness?.[vin.witness.length - 1].startsWith('50');
+          // script spends have more than one witness item, not counting the annex (if present)
+          if (vin.witness.length > (hasAnnex ? 2 : 1)) {
+            // the script itself is the second-to-last witness item, not counting the annex
+            const asm = vin.inner_witnessscript_asm || transactionUtils.convertScriptSigAsm(vin.witness[vin.witness.length - (hasAnnex ? 3 : 2)]);
+            // inscriptions smuggle data within an 'OP_0 OP_IF ... OP_ENDIF' envelope
+            if (asm?.includes('OP_0 OP_IF')) {
+              flags |= TransactionFlags.inscription;
+            }
+          }
+        } break;
+      }
+
+      // sighash flags
+      if (vin.prevout?.scriptpubkey_type === 'v1_p2tr') {
+        flags |= this.setSchnorrSighashFlags(flags, vin.witness);
+      } else if (vin.witness) {
+        flags |= this.setSegwitSighashFlags(flags, vin.witness);
+      } else if (vin.scriptsig?.length) {
+        flags |= this.setLegacySighashFlags(flags, vin.scriptsig_asm || transactionUtils.convertScriptSigAsm(vin.scriptsig));
+      }
+
+      if (vin.prevout?.scriptpubkey_address) {
+        reusedInputAddresses[vin.prevout?.scriptpubkey_address] = (reusedInputAddresses[vin.prevout?.scriptpubkey_address] || 0) + 1;
+      }
+      inValues[vin.prevout?.value || Math.random()] = (inValues[vin.prevout?.value || Math.random()] || 0) + 1;
+    }
+    if (rbf) {
+      flags |= TransactionFlags.rbf;
+    } else {
+      flags |= TransactionFlags.no_rbf;
+    }
+    let hasFakePubkey = false;
+    let P2WSHCount = 0;
+    let olgaSize = 0;
+    for (const vout of tx.vout) {
+      switch (vout.scriptpubkey_type) {
+        case 'p2pk': {
+          flags |= TransactionFlags.p2pk;
+          // detect fake pubkey (i.e. not a valid DER point on the secp256k1 curve)
+          hasFakePubkey = hasFakePubkey || !isPoint(vout.scriptpubkey?.slice(2, -2));
+        } break;
+        case 'multisig': {
+          flags |= TransactionFlags.p2ms;
+          // detect fake pubkeys (i.e. not valid DER points on the secp256k1 curve)
+          const asm = vout.scriptpubkey_asm || transactionUtils.convertScriptSigAsm(vout.scriptpubkey);
+          for (const key of (asm?.split(' ') || [])) {
+            if (!hasFakePubkey && !key.startsWith('OP_')) {
+              hasFakePubkey = hasFakePubkey || this.isBurnKey(key) || !isPoint(key);
+            }
+          }
+        } break;
+        case 'p2pkh': flags |= TransactionFlags.p2pkh; break;
+        case 'p2sh': flags |= TransactionFlags.p2sh; break;
+        case 'v0_p2wpkh': flags |= TransactionFlags.p2wpkh; break;
+        case 'v0_p2wsh': flags |= TransactionFlags.p2wsh; break;
+        case 'v1_p2tr': flags |= TransactionFlags.p2tr; break;
+        case 'op_return': flags |= TransactionFlags.op_return; break;
+      }
+      if (vout.scriptpubkey_address) {
+        reusedOutputAddresses[vout.scriptpubkey_address] = (reusedOutputAddresses[vout.scriptpubkey_address] || 0) + 1;
+      }
+      if (vout.scriptpubkey_type === 'v0_p2wsh') {
+        if (!P2WSHCount) {
+          olgaSize = parseInt(vout.scriptpubkey.slice(4, 8), 16);
+        }
+        P2WSHCount++;
+        if (P2WSHCount === Math.ceil((olgaSize + 2) / 32)) {
+          const nullBytes = (P2WSHCount * 32) - olgaSize - 2;
+          if (vout.scriptpubkey.endsWith(''.padEnd(nullBytes * 2, '0'))) {
+            flags |= TransactionFlags.fake_scripthash;
+          }
+        }
+      } else {
+        P2WSHCount = 0;
+      }
+      outValues[vout.value || Math.random()] = (outValues[vout.value || Math.random()] || 0) + 1;
+    }
+    if (hasFakePubkey) {
+      flags |= TransactionFlags.fake_pubkey;
+    }
+    
+    // fast but bad heuristic to detect possible coinjoins
+    // (at least 5 inputs and 5 outputs, less than half of which are unique amounts, with no address reuse)
+    const addressReuse = Object.keys(reusedOutputAddresses).reduce((acc, key) => Math.max(acc, (reusedInputAddresses[key] || 0) + (reusedOutputAddresses[key] || 0)), 0) > 1;
+    if (!addressReuse && tx.vin.length >= 5 && tx.vout.length >= 5 && (Object.keys(inValues).length + Object.keys(outValues).length) <= (tx.vin.length + tx.vout.length) / 2 ) {
+      flags |= TransactionFlags.coinjoin;
+    }
+    // more than 5:1 input:output ratio
+    if (tx.vin.length / tx.vout.length >= 5) {
+      flags |= TransactionFlags.consolidation;
+    }
+    // less than 1:5 input:output ratio
+    if (tx.vin.length / tx.vout.length <= 0.2) {
+      flags |= TransactionFlags.batch_payout;
+    }
+
+    if (this.isNonStandard(tx)) {
+      flags |= TransactionFlags.nonstandard;
+    }
+
+    return Number(flags);
+  }
+
+  static classifyTransaction(tx: TransactionExtended): TransactionClassified {
+    let flags = 0;
+    try {
+      flags = Common.getTransactionFlags(tx);
+    } catch (e) {
+      logger.warn('Failed to add classification flags to transaction: ' + (e instanceof Error ? e.message : e));
+    }
+    tx.flags = flags;
+    return {
+      ...Common.stripTransaction(tx),
+      flags,
+    };
+  }
+
+  static classifyTransactions(txs: TransactionExtended[]): TransactionClassified[] {
+    return txs.map(Common.classifyTransaction);
+  }
+
   static stripTransaction(tx: TransactionExtended): TransactionStripped {
     return {
       txid: tx.txid,
@@ -146,11 +552,12 @@ export class Common {
       value: tx.vout.reduce((acc, vout) => acc + (vout.value ? vout.value : 0), 0),
       acc: tx.acceleration || undefined,
       rate: tx.effectiveFeePerVsize,
+      time: tx.firstSeen || undefined,
     };
   }
 
   static stripTransactions(txs: TransactionExtended[]): TransactionStripped[] {
-    return txs.map(this.stripTransaction);
+    return txs.map(Common.stripTransaction);
   }
 
   static sleep$(ms: number): Promise<void> {
@@ -168,69 +575,6 @@ export class Common {
     }
   }
 
-  static setRelativesAndGetCpfpInfo(tx: MempoolTransactionExtended, memPool: { [txid: string]: MempoolTransactionExtended }): CpfpInfo {
-    const parents = this.findAllParents(tx, memPool);
-    const lowerFeeParents = parents.filter((parent) => parent.adjustedFeePerVsize < tx.effectiveFeePerVsize);
-
-    let totalWeight = (tx.adjustedVsize * 4) + lowerFeeParents.reduce((prev, val) => prev + (val.adjustedVsize * 4), 0);
-    let totalFees = tx.fee + lowerFeeParents.reduce((prev, val) => prev + val.fee, 0);
-
-    tx.ancestors = parents
-      .map((t) => {
-        return {
-          txid: t.txid,
-          weight: (t.adjustedVsize * 4),
-          fee: t.fee,
-        };
-      });
-
-    // Add high (high fee) decendant weight and fees
-    if (tx.bestDescendant) {
-      totalWeight += tx.bestDescendant.weight;
-      totalFees += tx.bestDescendant.fee;
-    }
-
-    tx.effectiveFeePerVsize = Math.max(0, totalFees / (totalWeight / 4));
-    tx.cpfpChecked = true;
-
-    return {
-      ancestors: tx.ancestors,
-      bestDescendant: tx.bestDescendant || null,
-    };
-  }
-
-
-  private static findAllParents(tx: MempoolTransactionExtended, memPool: { [txid: string]: MempoolTransactionExtended }): MempoolTransactionExtended[] {
-    let parents: MempoolTransactionExtended[] = [];
-    tx.vin.forEach((parent) => {
-      if (parents.find((p) => p.txid === parent.txid)) {
-        return;
-      }
-
-      const parentTx = memPool[parent.txid];
-      if (parentTx) {
-        if (tx.bestDescendant && tx.bestDescendant.fee / (tx.bestDescendant.weight / 4) > parentTx.adjustedFeePerVsize) {
-          if (parentTx.bestDescendant && parentTx.bestDescendant.fee < tx.fee + tx.bestDescendant.fee) {
-            parentTx.bestDescendant = {
-              weight: (tx.adjustedVsize * 4) + tx.bestDescendant.weight,
-              fee: tx.fee + tx.bestDescendant.fee,
-              txid: tx.txid,
-            };
-          }
-        } else if (tx.adjustedFeePerVsize > parentTx.adjustedFeePerVsize) {
-          parentTx.bestDescendant = {
-            weight: (tx.adjustedVsize * 4),
-            fee: tx.fee,
-            txid: tx.txid
-          };
-        }
-        parents.push(parentTx);
-        parents = parents.concat(this.findAllParents(parentTx, memPool));
-      }
-    });
-    return parents;
-  }
-
   // calculates the ratio of matched transactions to projected transactions by weight
   static getSimilarity(projectedBlock: MempoolBlockWithTransactions, transactions: TransactionExtended[]): number {
     let matchedWeight = 0;
@@ -286,6 +630,13 @@ export class Common {
     );
   }
 
+  static gogglesIndexingEnabled(): boolean {
+    return (
+      Common.blocksSummariesIndexingEnabled() &&
+      config.MEMPOOL.GOGGLES_INDEXING === true
+    );
+  }
+
   static cpfpIndexingEnabled(): boolean {
     return (
       Common.indexingEnabled() &&
@@ -413,12 +764,12 @@ export class Common {
     }
   }
 
-  static calculateCpfp(height: number, transactions: TransactionExtended[]): CpfpSummary {
+  static calculateCpfp(height: number, transactions: TransactionExtended[], saveRelatives: boolean = false): CpfpSummary {
     const clusters: CpfpCluster[] = []; // list of all cpfp clusters in this block
     const clusterMap: { [txid: string]: CpfpCluster } = {}; // map transactions to their cpfp cluster
     let clusterTxs: TransactionExtended[] = []; // working list of elements of the current cluster
     let ancestors: { [txid: string]: boolean } = {}; // working set of ancestors of the current cluster root
-    const txMap = {};
+    const txMap: { [txid: string]: TransactionExtended } = {};
     // initialize the txMap
     for (const tx of transactions) {
       txMap[tx.txid] = tx;
@@ -488,6 +839,15 @@ export class Common {
         }
       }
     }
+    if (saveRelatives) {
+      for (const cluster of clusters) {
+        cluster.txs.forEach((member, index) => {
+          txMap[member.txid].descendants = cluster.txs.slice(0, index).reverse();
+          txMap[member.txid].ancestors = cluster.txs.slice(index + 1).reverse();
+          txMap[member.txid].effectiveFeePerVsize = cluster.effectiveFeePerVsize;
+        });
+      }
+    }
     return {
       transactions,
       clusters,

backend/src/api/cpfp.ts

@@ -0,0 +1,286 @@
+import { CpfpInfo, MempoolTransactionExtended } from '../mempool.interfaces';
+import memPool from './mempool';
+
+const CPFP_UPDATE_INTERVAL = 60_000; // update CPFP info at most once per 60s per transaction
+const MAX_GRAPH_SIZE = 50; // the maximum number of in-mempool relatives to consider
+
+interface GraphTx extends MempoolTransactionExtended {
+  depends: string[];
+  spentby: string[];
+  ancestorMap: Map<string, GraphTx>;
+  fees: {
+    base: number;
+    ancestor: number;
+  };
+  ancestorcount: number;
+  ancestorsize: number;
+  ancestorRate: number;
+  individualRate: number;
+  score: number;
+}
+
+/**
+ * Takes a mempool transaction and a copy of the current mempool, and calculates the CPFP data for
+ * that transaction (and all others in the same cluster)
+ */
+export function calculateCpfp(tx: MempoolTransactionExtended, mempool: { [txid: string]: MempoolTransactionExtended }): CpfpInfo {
+  if (tx.cpfpUpdated && Date.now() < (tx.cpfpUpdated + CPFP_UPDATE_INTERVAL)) {
+    tx.cpfpDirty = false;
+    return {
+      ancestors: tx.ancestors || [],
+      bestDescendant: tx.bestDescendant || null,
+      descendants: tx.descendants || [],
+      effectiveFeePerVsize: tx.effectiveFeePerVsize || tx.adjustedFeePerVsize || tx.feePerVsize,
+      sigops: tx.sigops,
+      adjustedVsize: tx.adjustedVsize,
+      acceleration: tx.acceleration
+    };
+  }
+
+  const ancestorMap = new Map<string, GraphTx>();
+  const graphTx = mempoolToGraphTx(tx);
+  ancestorMap.set(tx.txid, graphTx);
+
+  const allRelatives = expandRelativesGraph(mempool, ancestorMap);
+  const relativesMap = initializeRelatives(allRelatives);
+  const cluster = calculateCpfpCluster(tx.txid, relativesMap);
+
+  let totalVsize = 0;
+  let totalFee = 0;
+  for (const tx of cluster.values()) {
+    totalVsize += tx.adjustedVsize;
+    totalFee += tx.fee;
+  }
+  const effectiveFeePerVsize = totalFee / totalVsize;
+  for (const tx of cluster.values()) {
+    mempool[tx.txid].effectiveFeePerVsize = effectiveFeePerVsize;
+    mempool[tx.txid].ancestors = Array.from(tx.ancestorMap.values()).map(tx => ({ txid: tx.txid, weight: tx.weight, fee: tx.fee }));
+    mempool[tx.txid].descendants = Array.from(cluster.values()).filter(entry => entry.txid !== tx.txid && !tx.ancestorMap.has(entry.txid)).map(tx => ({ txid: tx.txid, weight: tx.weight, fee: tx.fee }));
+    mempool[tx.txid].bestDescendant = null;
+    mempool[tx.txid].cpfpChecked = true;
+    mempool[tx.txid].cpfpDirty = true;
+    mempool[tx.txid].cpfpUpdated = Date.now();
+  }
+
+  tx = mempool[tx.txid];
+
+  return {
+    ancestors: tx.ancestors || [],
+    bestDescendant: tx.bestDescendant || null,
+    descendants: tx.descendants || [],
+    effectiveFeePerVsize: tx.effectiveFeePerVsize || tx.adjustedFeePerVsize || tx.feePerVsize,
+    sigops: tx.sigops,
+    adjustedVsize: tx.adjustedVsize,
+    acceleration: tx.acceleration
+  };
+}
+
+function mempoolToGraphTx(tx: MempoolTransactionExtended): GraphTx {
+  return {
+    ...tx,
+    depends: tx.vin.map(v => v.txid),
+    spentby: tx.vout.map((v, i) => memPool.getFromSpendMap(tx.txid, i)).map(tx => tx?.txid).filter(txid => txid != null) as string[],
+    ancestorMap: new Map(),
+    fees: {
+      base: tx.fee,
+      ancestor: tx.fee,
+    },
+    ancestorcount: 1,
+    ancestorsize: tx.adjustedVsize,
+    ancestorRate: 0,
+    individualRate: 0,
+    score: 0,
+  };
+}
+
+/**
+ * Takes a map of transaction ancestors, and expands it into a full graph of up to MAX_GRAPH_SIZE in-mempool relatives
+ */
+function expandRelativesGraph(mempool: { [txid: string]: MempoolTransactionExtended }, ancestors: Map<string, GraphTx>): Map<string, GraphTx> {
+  const relatives: Map<string, GraphTx> = new Map();
+  const stack: GraphTx[] = Array.from(ancestors.values());
+  while (stack.length > 0) {
+    if (relatives.size > MAX_GRAPH_SIZE) {
+      return relatives;
+    }
+
+    const nextTx = stack.pop();
+    if (!nextTx) {
+      continue;
+    }
+    relatives.set(nextTx.txid, nextTx);
+
+    for (const relativeTxid of [...nextTx.depends, ...nextTx.spentby]) {
+      if (relatives.has(relativeTxid)) {
+        // already processed this tx
+        continue;
+      }
+      let mempoolTx = ancestors.get(relativeTxid);
+      if (!mempoolTx && mempool[relativeTxid]) {
+        mempoolTx = mempoolToGraphTx(mempool[relativeTxid]);
+      }
+      if (mempoolTx) {
+        stack.push(mempoolTx);
+      }
+    }
+  }
+
+  return relatives;
+}
+
+ /**
+   * Efficiently sets a Map of in-mempool ancestors for each member of an expanded relative graph
+   * by running setAncestors on each leaf, and caching intermediate results.
+   * then initializes ancestor data for each transaction
+   * 
+   * @param all 
+   */
+ function initializeRelatives(mempoolTxs: Map<string, GraphTx>): Map<string, GraphTx> {
+  const visited: Map<string, Map<string, GraphTx>> = new Map();
+  const leaves: GraphTx[] = Array.from(mempoolTxs.values()).filter(entry => entry.spentby.length === 0);
+  for (const leaf of leaves) {
+    setAncestors(leaf, mempoolTxs, visited);
+  }
+  mempoolTxs.forEach(entry => {
+    entry.ancestorMap?.forEach(ancestor => {
+      entry.ancestorcount++;
+      entry.ancestorsize += ancestor.adjustedVsize;
+      entry.fees.ancestor += ancestor.fees.base;
+    });
+    setAncestorScores(entry);
+  });
+  return mempoolTxs;
+}
+
+/**
+   * Given a root transaction and a list of in-mempool ancestors,
+   * Calculate the CPFP cluster
+   * 
+   * @param tx
+   * @param ancestors
+   */
+function calculateCpfpCluster(txid: string, graph: Map<string, GraphTx>): Map<string, GraphTx> {
+  const tx = graph.get(txid);
+  if (!tx) {
+    return new Map<string, GraphTx>([]);
+  }
+
+  // Initialize individual & ancestor fee rates
+  graph.forEach(entry => setAncestorScores(entry));
+
+  // Sort by descending ancestor score
+  let sortedRelatives = Array.from(graph.values()).sort(mempoolComparator);
+
+  // Iterate until we reach a cluster that includes our target tx
+  let maxIterations = MAX_GRAPH_SIZE;
+  let best = sortedRelatives.shift();
+  let bestCluster = new Map<string, GraphTx>(best?.ancestorMap?.entries() || []);
+  while (sortedRelatives.length && best && (best.txid !== tx.txid && !best.ancestorMap.has(tx.txid)) && maxIterations > 0) {
+    maxIterations--;
+    if ((best && best.txid === tx.txid) || (bestCluster && bestCluster.has(tx.txid))) {
+      break;
+    } else {
+      // Remove this cluster (it doesn't include our target tx)
+      // and update scores, ancestor totals and dependencies for the survivors
+      removeAncestors(bestCluster, graph);
+
+      // re-sort
+      sortedRelatives = Array.from(graph.values()).sort(mempoolComparator);
+
+      // Grab the next highest scoring entry
+      best = sortedRelatives.shift();
+      if (best) {
+        bestCluster = new Map<string, GraphTx>(best?.ancestorMap?.entries() || []);
+        bestCluster.set(best?.txid, best);
+      }
+    }
+  }
+
+  bestCluster.set(tx.txid, tx);
+
+  return bestCluster;
+}
+
+ /**
+   * Remove a cluster of transactions from an in-mempool dependency graph
+   * and update the survivors' scores and ancestors
+   * 
+   * @param cluster 
+   * @param ancestors 
+   */
+ function removeAncestors(cluster: Map<string, GraphTx>, all: Map<string, GraphTx>): void {
+  // remove
+  cluster.forEach(tx => {
+    all.delete(tx.txid);
+  });
+
+  // update survivors
+  all.forEach(tx => {
+    cluster.forEach(remove => {
+      if (tx.ancestorMap?.has(remove.txid)) {
+        // remove as dependency
+        tx.ancestorMap.delete(remove.txid);
+        tx.depends = tx.depends.filter(parent => parent !== remove.txid);
+        // update ancestor sizes and fees
+        tx.ancestorsize -= remove.adjustedVsize;
+        tx.fees.ancestor -= remove.fees.base;
+      }
+    });
+    // recalculate fee rates
+    setAncestorScores(tx);
+  });
+}
+
+/**
+   * Recursively traverses an in-mempool dependency graph, and sets a Map of in-mempool ancestors
+   * for each transaction.
+   * 
+   * @param tx 
+   * @param all 
+   */
+function setAncestors(tx: GraphTx, all: Map<string, GraphTx>, visited: Map<string, Map<string, GraphTx>>, depth: number = 0): Map<string, GraphTx> {
+  // sanity check for infinite recursion / too many ancestors (should never happen)
+  if (depth > MAX_GRAPH_SIZE) {
+    return tx.ancestorMap;
+  }
+  
+  // initialize the ancestor map for this tx
+  tx.ancestorMap = new Map<string, GraphTx>();
+  tx.depends.forEach(parentId => {
+    const parent = all.get(parentId);
+    if (parent) {
+      // add the parent
+      tx.ancestorMap?.set(parentId, parent);
+      // check for a cached copy of this parent's ancestors
+      let ancestors = visited.get(parent.txid);
+      if (!ancestors) {
+        // recursively fetch the parent's ancestors
+        ancestors = setAncestors(parent, all, visited, depth + 1);
+      }
+      // and add to this tx's map
+      ancestors.forEach((ancestor, ancestorId) => {
+        tx.ancestorMap?.set(ancestorId, ancestor);
+      });
+    }
+  });
+  visited.set(tx.txid, tx.ancestorMap);
+
+  return tx.ancestorMap;
+}
+
+/**
+   * Take a mempool transaction, and set the fee rates and ancestor score
+   * 
+   * @param tx 
+   */
+function setAncestorScores(tx: GraphTx): GraphTx {
+  tx.individualRate = (tx.fees.base * 100_000_000) / tx.adjustedVsize;
+  tx.ancestorRate = (tx.fees.ancestor * 100_000_000) / tx.ancestorsize;
+  tx.score = Math.min(tx.individualRate, tx.ancestorRate);
+  return tx;
+}
+
+// Sort by descending score
+function mempoolComparator(a: GraphTx, b: GraphTx): number {
+  return b.score - a.score;
+}

backend/src/api/database-migration.ts

@@ -7,7 +7,7 @@ import cpfpRepository from '../repositories/CpfpRepository';
 import { RowDataPacket } from 'mysql2';
 
 class DatabaseMigration {
-  private static currentVersion = 66;
+  private static currentVersion = 76;
   private queryTimeout = 3600_000;
   private statisticsAddedIndexed = false;
   private uniqueLogs: string[] = [];
@@ -558,6 +558,112 @@ class DatabaseMigration {
       await this.$executeQuery('ALTER TABLE `statistics` ADD min_fee FLOAT UNSIGNED DEFAULT NULL');
       await this.updateToSchemaVersion(66);
     }
+
+    if (databaseSchemaVersion < 67  && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks_summaries` ADD version INT NOT NULL DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `blocks_summaries` ADD INDEX `version` (`version`)');
+      await this.$executeQuery('ALTER TABLE `blocks_templates` ADD version INT NOT NULL DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `blocks_templates` ADD INDEX `version` (`version`)');
+      await this.updateToSchemaVersion(67);
+    }
+    
+    if (databaseSchemaVersion < 68 && config.MEMPOOL.NETWORK === "liquid") {
+      await this.$executeQuery('TRUNCATE TABLE elements_pegs');
+      await this.$executeQuery('ALTER TABLE elements_pegs ADD PRIMARY KEY (txid, txindex);');
+      await this.$executeQuery(`UPDATE state SET number = 0 WHERE name = 'last_elements_block';`);
+      // Create the federation_addresses table and add the two Liquid Federation change addresses in
+      await this.$executeQuery(this.getCreateFederationAddressesTableQuery(), await this.$checkIfTableExists('federation_addresses'));
+      await this.$executeQuery(`INSERT INTO federation_addresses (bitcoinaddress) VALUES ('bc1qxvay4an52gcghxq5lavact7r6qe9l4laedsazz8fj2ee2cy47tlqff4aj4')`); // Federation change address
+      await this.$executeQuery(`INSERT INTO federation_addresses (bitcoinaddress) VALUES ('3EiAcrzq1cELXScc98KeCswGWZaPGceT1d')`); // Federation change address
+      // Create the federation_txos table that uses the federation_addresses table as a foreign key
+      await this.$executeQuery(this.getCreateFederationTxosTableQuery(), await this.$checkIfTableExists('federation_txos'));
+      await this.$executeQuery(`INSERT INTO state VALUES('last_bitcoin_block_audit', 0, NULL);`);
+      await this.updateToSchemaVersion(68);
+    }
+
+    if (databaseSchemaVersion < 69 && config.MEMPOOL.NETWORK === 'mainnet') {
+      await this.$executeQuery(this.getCreateAccelerationsTableQuery(), await this.$checkIfTableExists('accelerations'));
+      await this.updateToSchemaVersion(69);
+    }
+
+    if (databaseSchemaVersion < 70 && config.MEMPOOL.NETWORK === 'mainnet') {
+      await this.$executeQuery('ALTER TABLE accelerations MODIFY COLUMN added DATETIME;');
+      await this.updateToSchemaVersion(70);
+    }
+
+    if (databaseSchemaVersion < 71 && config.MEMPOOL.NETWORK === 'liquid') {
+      await this.$executeQuery('TRUNCATE TABLE elements_pegs');
+      await this.$executeQuery('TRUNCATE TABLE federation_txos');
+      await this.$executeQuery('SET FOREIGN_KEY_CHECKS = 0');
+      await this.$executeQuery('TRUNCATE TABLE federation_addresses');
+      await this.$executeQuery('SET FOREIGN_KEY_CHECKS = 1');
+      await this.$executeQuery(`INSERT INTO federation_addresses (bitcoinaddress) VALUES ('bc1qxvay4an52gcghxq5lavact7r6qe9l4laedsazz8fj2ee2cy47tlqff4aj4')`); // Federation change address
+      await this.$executeQuery(`INSERT INTO federation_addresses (bitcoinaddress) VALUES ('3EiAcrzq1cELXScc98KeCswGWZaPGceT1d')`); // Federation change address
+      await this.$executeQuery(`UPDATE state SET number = 0 WHERE name = 'last_elements_block';`);
+      await this.$executeQuery(`UPDATE state SET number = 0 WHERE name = 'last_bitcoin_block_audit';`);
+      await this.$executeQuery('ALTER TABLE `federation_txos` ADD timelock INT NOT NULL DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `federation_txos` ADD expiredAt INT NOT NULL DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `federation_txos` ADD emergencyKey TINYINT NOT NULL DEFAULT 0');
+      await this.updateToSchemaVersion(71);
+    }
+
+    if (databaseSchemaVersion < 72 && isBitcoin === true) {
+      // reindex Goggles flags for mined block templates above height 832000
+      await this.$executeQuery('UPDATE blocks_summaries SET version = 0 WHERE height >= 832000;');
+      await this.updateToSchemaVersion(72);
+    }
+
+    if (databaseSchemaVersion < 73 && config.MEMPOOL.NETWORK === 'mainnet') {
+      // Clear bad data
+      await this.$executeQuery(`TRUNCATE accelerations`);
+      this.uniqueLog(logger.notice, `'accelerations' table has been truncated`);
+      await this.updateToSchemaVersion(73);
+    }
+
+    if (databaseSchemaVersion < 74 && config.MEMPOOL.NETWORK === 'mainnet') {
+      await this.$executeQuery(`INSERT INTO state(name, number) VALUE ('last_acceleration_block', 0);`);
+      await this.updateToSchemaVersion(74);
+    }
+
+    if (databaseSchemaVersion < 75) {
+      await this.$executeQuery('ALTER TABLE `prices` ADD `BGN` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `BRL` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `CNY` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `CZK` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `DKK` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `HKD` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `HRK` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `HUF` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `IDR` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `ILS` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `INR` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `ISK` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `KRW` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `MXN` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `MYR` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `NOK` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `NZD` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `PHP` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `PLN` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `RON` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `RUB` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `SEK` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `SGD` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `THB` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `TRY` float DEFAULT "-1"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `ZAR` float DEFAULT "-1"');
+
+      await this.$executeQuery('TRUNCATE hashrates');
+      await this.$executeQuery('TRUNCATE difficulty_adjustments');
+      await this.$executeQuery(`UPDATE state SET string = NULL WHERE name = 'pools_json_sha'`);
+
+      await this.updateToSchemaVersion(75);
+    }
+
+    if (databaseSchemaVersion < 76 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD prioritized_txs JSON DEFAULT "[]"');
+      await this.updateToSchemaVersion(76);
+    }
   }
 
   /**
@@ -805,6 +911,32 @@ class DatabaseMigration {
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
   }
 
+  private getCreateFederationAddressesTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS federation_addresses (
+      bitcoinaddress varchar(100) NOT NULL,
+      PRIMARY KEY (bitcoinaddress)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateFederationTxosTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS federation_txos (
+      txid varchar(65) NOT NULL,
+      txindex int(11) NOT NULL,
+      bitcoinaddress varchar(100) NOT NULL,
+      amount bigint(20) unsigned NOT NULL,
+      blocknumber int(11) unsigned NOT NULL,
+      blocktime int(11) unsigned NOT NULL,
+      unspent tinyint(1) NOT NULL,
+      lastblockupdate int(11) unsigned NOT NULL,
+      lasttimeupdate int(11) unsigned NOT NULL,
+      pegtxid varchar(65) NOT NULL,
+      pegindex int(11) NOT NULL,
+      pegblocktime int(11) unsigned NOT NULL,
+      PRIMARY KEY (txid, txindex), 
+      FOREIGN KEY (bitcoinaddress) REFERENCES federation_addresses (bitcoinaddress)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
   private getCreatePoolsTableQuery(): string {
     return `CREATE TABLE IF NOT EXISTS pools (
       id int(11) NOT NULL AUTO_INCREMENT,
@@ -1075,6 +1207,23 @@ class DatabaseMigration {
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
   }
 
+  private getCreateAccelerationsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS accelerations (
+      txid varchar(65) NOT NULL,
+      added datetime NOT NULL,
+      height int(10) NOT NULL,
+      pool smallint unsigned NULL,
+      effective_vsize int(10) NOT NULL,
+      effective_fee bigint(20) unsigned NOT NULL,
+      boost_rate float unsigned,
+      boost_cost bigint(20) unsigned NOT NULL,
+      PRIMARY KEY (txid),
+      INDEX (added),
+      INDEX (height),
+      INDEX (pool)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
   public async $blocksReindexingTruncate(): Promise<void> {
     logger.warn(`Truncating pools, blocks, hashrates and difficulty_adjustments tables for re-indexing (using '--reindex-blocks'). You can cancel this command within 5 seconds`);
     await Common.sleep$(5000);

backend/src/api/difficulty-adjustment.ts

@@ -12,6 +12,7 @@ export interface DifficultyAdjustment {
   previousTime: number;          // Unix time in ms
   nextRetargetHeight: number;    // Block Height
   timeAvg: number;               // Duration of time in ms
+  adjustedTimeAvg;               // Expected block interval with hashrate implied over last 504 blocks
   timeOffset: number;            // (Testnet) Time since last block (cap @ 20min) in ms
   expectedBlocks: number;         // Block count
 }
@@ -80,6 +81,7 @@ export function calcBitsDifference(oldBits: number, newBits: number): number {
 
 export function calcDifficultyAdjustment(
   DATime: number,
+  quarterEpochTime: number | null,
   nowSeconds: number,
   blockHeight: number,
   previousRetarget: number,
@@ -100,8 +102,20 @@ export function calcDifficultyAdjustment(
 
   let difficultyChange = 0;
   let timeAvgSecs = blocksInEpoch ? diffSeconds / blocksInEpoch : BLOCK_SECONDS_TARGET;
+  let adjustedTimeAvgSecs = timeAvgSecs;
+
+  // for the first 504 blocks of the epoch, calculate the expected avg block interval
+  // from a sliding window over the last 504 blocks
+  if (quarterEpochTime && blocksInEpoch < 503) {
+    const timeLastEpoch = DATime - quarterEpochTime;
+    const adjustedTimeLastEpoch = timeLastEpoch * (1 + (previousRetarget / 100));
+    const adjustedTimeSpan = diffSeconds + adjustedTimeLastEpoch;
+    adjustedTimeAvgSecs = adjustedTimeSpan / 503;
+    difficultyChange = (BLOCK_SECONDS_TARGET / (adjustedTimeSpan / 504) - 1) * 100;
+  } else {
+    difficultyChange = (BLOCK_SECONDS_TARGET / (actualTimespan / (blocksInEpoch + 1)) - 1) * 100;
+  }
 
-  difficultyChange = (BLOCK_SECONDS_TARGET / (actualTimespan / (blocksInEpoch + 1)) - 1) * 100;
   // Max increase is x4 (+300%)
   if (difficultyChange > 300) {
     difficultyChange = 300;
@@ -126,7 +140,8 @@ export function calcDifficultyAdjustment(
   }
 
   const timeAvg = Math.floor(timeAvgSecs * 1000);
-  const remainingTime = remainingBlocks * timeAvg;
+  const adjustedTimeAvg = Math.floor(adjustedTimeAvgSecs * 1000);
+  const remainingTime = remainingBlocks * adjustedTimeAvg;
   const estimatedRetargetDate = remainingTime + nowSeconds * 1000;
 
   return {
@@ -139,6 +154,7 @@ export function calcDifficultyAdjustment(
     previousTime: DATime,
     nextRetargetHeight,
     timeAvg,
+    adjustedTimeAvg,
     timeOffset,
     expectedBlocks,
   };
@@ -155,9 +171,10 @@ class DifficultyAdjustmentApi {
       return null;
     }
     const nowSeconds = Math.floor(new Date().getTime() / 1000);
+    const quarterEpochBlockTime = blocks.getQuarterEpochBlockTime();
 
     return calcDifficultyAdjustment(
-      DATime, nowSeconds, blockHeight, previousRetarget,
+      DATime, quarterEpochBlockTime, nowSeconds, blockHeight, previousRetarget,
       config.MEMPOOL.NETWORK, latestBlock.timestamp
     );
   }

backend/src/api/disk-cache.ts

@@ -252,7 +252,12 @@ class DiskCache {
       }
 
       if (rbfData?.rbf) {
-        rbfCache.load(rbfData.rbf);
+        rbfCache.load({
+          txs: rbfData.rbf.txs.map(([txid, entry]) => ({ value: entry })),
+          trees: rbfData.rbf.trees,
+          expiring: rbfData.rbf.expiring.map(([txid, value]) => ({ key: txid, value })),
+          mempool: memPool.getMempool(),
+        });
       }
     } catch (e) {
       logger.warn('Failed to parse rbf cache. Skipping. Reason: ' + (e instanceof Error ? e.message : e));

backend/src/api/explorer/channels.api.ts

@@ -80,7 +80,13 @@ class ChannelsApi {
 
   public async $searchChannelsById(search: string): Promise<any[]> {
     try {
-      const searchStripped = search.replace(/[^0-9x]/g, '') + '%';
+      // restrict search to valid id/short_id prefix formats
+      let searchStripped = search.match(/^[0-9]+[0-9x]*$/)?.[0] || '';
+      if (!searchStripped.length) {
+        return [];
+      }
+      // add wildcard to search by prefix
+      searchStripped += '%';
       const query = `SELECT id, short_id, capacity, status FROM channels WHERE id LIKE ? OR short_id LIKE ? LIMIT 10`;
       const [rows]: any = await DB.query(query, [searchStripped, searchStripped]);
       return rows;

backend/src/api/fee-api.ts

@@ -1,23 +1,35 @@
 import { MempoolBlock } from '../mempool.interfaces';
-import { Common } from './common';
+import config from '../config';
 import mempool from './mempool';
 import projectedBlocks from './mempool-blocks';
 
+const isLiquid = config.MEMPOOL.NETWORK === 'liquid' || config.MEMPOOL.NETWORK === 'liquidtestnet';
+
+interface RecommendedFees {
+  fastestFee: number,
+  halfHourFee: number,
+  hourFee: number,
+  economyFee: number,
+  minimumFee: number,
+}
+
 class FeeApi {
   constructor() { }
 
-  defaultFee = Common.isLiquid() ? 0.1 : 1;
+  defaultFee = isLiquid ? 0.1 : 1;
+  minimumIncrement = isLiquid ? 0.1 : 1;
 
-  public getRecommendedFee() {
+  public getRecommendedFee(): RecommendedFees {
     const pBlocks = projectedBlocks.getMempoolBlocks();
     const mPool = mempool.getMempoolInfo();
-    const minimumFee = Math.ceil(mPool.mempoolminfee * 100000);
+    const minimumFee = this.roundUpToNearest(mPool.mempoolminfee * 100000, this.minimumIncrement);
+    const defaultMinFee = Math.max(minimumFee, this.defaultFee);
 
     if (!pBlocks.length) {
       return {
-        'fastestFee': this.defaultFee,
-        'halfHourFee': this.defaultFee,
-        'hourFee': this.defaultFee,
+        'fastestFee': defaultMinFee,
+        'halfHourFee': defaultMinFee,
+        'hourFee': defaultMinFee,
         'economyFee': minimumFee,
         'minimumFee': minimumFee,
       };
@@ -27,11 +39,25 @@ class FeeApi {
     const secondMedianFee = pBlocks[1] ? this.optimizeMedianFee(pBlocks[1], pBlocks[2], firstMedianFee) : this.defaultFee;
     const thirdMedianFee = pBlocks[2] ? this.optimizeMedianFee(pBlocks[2], pBlocks[3], secondMedianFee) : this.defaultFee;
 
+    let fastestFee = Math.max(minimumFee, firstMedianFee);
+    let halfHourFee = Math.max(minimumFee, secondMedianFee);
+    let hourFee = Math.max(minimumFee, thirdMedianFee);
+    const economyFee = Math.max(minimumFee, Math.min(2 * minimumFee, thirdMedianFee));
+
+    // ensure recommendations always increase w/ priority
+    fastestFee = Math.max(fastestFee, halfHourFee, hourFee, economyFee);
+    halfHourFee = Math.max(halfHourFee, hourFee, economyFee);
+    hourFee = Math.max(hourFee, economyFee);
+
+    // explicitly enforce a minimum of ceil(mempoolminfee) on all recommendations.
+    // simply rounding up recommended rates is insufficient, as the purging rate
+    // can exceed the median rate of projected blocks in some extreme scenarios
+    // (see https://bitcoin.stackexchange.com/a/120024)
     return {
-      'fastestFee': firstMedianFee,
-      'halfHourFee': secondMedianFee,
-      'hourFee': thirdMedianFee,
-      'economyFee': Math.min(2 * minimumFee, thirdMedianFee),
+      'fastestFee': fastestFee,
+      'halfHourFee': halfHourFee,
+      'hourFee': hourFee,
+      'economyFee': economyFee,
       'minimumFee': minimumFee,
     };
   }
@@ -45,7 +71,11 @@ class FeeApi {
       const multiplier = (pBlock.blockVSize - 500000) / 500000;
       return Math.max(Math.round(useFee * multiplier), this.defaultFee);
     }
-    return Math.ceil(useFee);
+    return this.roundUpToNearest(useFee, this.minimumIncrement);
+  }
+
+  private roundUpToNearest(value: number, nearest: number): number {
+    return Math.ceil(value / nearest) * nearest;
   }
 }
 

backend/src/api/lightning/clightning/clightning-convert.ts

@@ -44,9 +44,13 @@ export enum FeatureBits {
 	KeysendOptional = 55,
 	ScriptEnforcedLeaseRequired = 2022,
 	ScriptEnforcedLeaseOptional = 2023,
+	SimpleTaprootChannelsRequiredFinal = 80,
+	SimpleTaprootChannelsOptionalFinal = 81,
+	SimpleTaprootChannelsRequiredStaging = 180,
+	SimpleTaprootChannelsOptionalStaging = 181,
 	MaxBolt11Feature = 5114,
 };
-  
+
 export const FeaturesMap = new Map<FeatureBits, string>([
 	[FeatureBits.DataLossProtectRequired, 'data-loss-protect'],
 	[FeatureBits.DataLossProtectOptional, 'data-loss-protect'],
@@ -85,6 +89,10 @@ export const FeaturesMap = new Map<FeatureBits, string>([
 	[FeatureBits.ZeroConfOptional, 'zero-conf'],
 	[FeatureBits.ShutdownAnySegwitRequired, 'shutdown-any-segwit'],
 	[FeatureBits.ShutdownAnySegwitOptional, 'shutdown-any-segwit'],
+	[FeatureBits.SimpleTaprootChannelsRequiredFinal, 'taproot-channels'],
+	[FeatureBits.SimpleTaprootChannelsOptionalFinal, 'taproot-channels'],
+	[FeatureBits.SimpleTaprootChannelsRequiredStaging, 'taproot-channels-staging'],
+	[FeatureBits.SimpleTaprootChannelsOptionalStaging, 'taproot-channels-staging'],
 ]);
 
 /**

backend/src/api/liquid/elements-parser.ts

@@ -5,8 +5,12 @@ import { Common } from '../common';
 import DB from '../../database';
 import logger from '../../logger';
 
+const federationChangeAddresses = ['bc1qxvay4an52gcghxq5lavact7r6qe9l4laedsazz8fj2ee2cy47tlqff4aj4', '3EiAcrzq1cELXScc98KeCswGWZaPGceT1d'];
+const auditBlockOffsetWithTip = 1; // Wait for 1 block confirmation before processing the block in the audit process to reduce the risk of reorgs
+
 class ElementsParser {
   private isRunning = false;
+  private isUtxosUpdatingRunning = false;
 
   constructor() { }
 
@@ -32,12 +36,6 @@ class ElementsParser {
     }
   }
 
-  public async $getPegDataByMonth(): Promise<any> {
-    const query = `SELECT SUM(amount) AS amount, DATE_FORMAT(FROM_UNIXTIME(datetime), '%Y-%m-01') AS date FROM elements_pegs GROUP BY DATE_FORMAT(FROM_UNIXTIME(datetime), '%Y%m')`;
-    const [rows] = await DB.query(query);
-    return rows;
-  }
-
   protected async $parseBlock(block: IBitcoinApi.Block) {
     for (const tx of block.tx) {
       await this.$parseInputs(tx, block);
@@ -55,29 +53,30 @@ class ElementsParser {
 
   protected async $parsePegIn(input: IBitcoinApi.Vin, vindex: number, txid: string, block: IBitcoinApi.Block) {
     const bitcoinTx: IBitcoinApi.Transaction = await bitcoinSecondClient.getRawTransaction(input.txid, true);
+    const bitcoinBlock: IBitcoinApi.Block = await bitcoinSecondClient.getBlock(bitcoinTx.blockhash);
     const prevout = bitcoinTx.vout[input.vout || 0];
     const outputAddress = prevout.scriptPubKey.address || (prevout.scriptPubKey.addresses && prevout.scriptPubKey.addresses[0]) || '';
     await this.$savePegToDatabase(block.height, block.time, prevout.value * 100000000, txid, vindex,
-      outputAddress, bitcoinTx.txid, prevout.n, 1);
+      outputAddress, bitcoinTx.txid, prevout.n, bitcoinBlock.height, bitcoinBlock.time, 1);
   }
 
   protected async $parseOutputs(tx: IBitcoinApi.Transaction, block: IBitcoinApi.Block) {
     for (const output of tx.vout) {
       if (output.scriptPubKey.pegout_chain) {
         await this.$savePegToDatabase(block.height, block.time, 0 - output.value * 100000000, tx.txid, output.n,
-          (output.scriptPubKey.pegout_addresses && output.scriptPubKey.pegout_addresses[0] || ''), '', 0, 0);
+          (output.scriptPubKey.pegout_address || ''), '', 0, 0, 0, 0);
       }
       if (!output.scriptPubKey.pegout_chain && output.scriptPubKey.type === 'nulldata'
         && output.value && output.value > 0 && output.asset && output.asset === Common.nativeAssetId) {
         await this.$savePegToDatabase(block.height, block.time, 0 - output.value * 100000000, tx.txid, output.n,
-          (output.scriptPubKey.pegout_addresses && output.scriptPubKey.pegout_addresses[0] || ''), '', 0, 1);
+          (output.scriptPubKey.pegout_address || ''), '', 0, 0, 0, 1);
       }
     }
   }
 
   protected async $savePegToDatabase(height: number, blockTime: number, amount: number, txid: string,
-    txindex: number, bitcoinaddress: string, bitcointxid: string, bitcoinindex: number, final_tx: number): Promise<void> {
-    const query = `INSERT INTO elements_pegs(
+    txindex: number, bitcoinaddress: string, bitcointxid: string, bitcoinindex: number, bitcoinblock: number, bitcoinBlockTime: number, final_tx: number): Promise<void> {
+    const query = `INSERT IGNORE INTO elements_pegs(
         block, datetime, amount, txid, txindex, bitcoinaddress, bitcointxid, bitcoinindex, final_tx
       ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`;
 
@@ -85,7 +84,22 @@ class ElementsParser {
       height, blockTime, amount, txid, txindex, bitcoinaddress, bitcointxid, bitcoinindex, final_tx
     ];
     await DB.query(query, params);
-    logger.debug(`Saved L-BTC peg from block height #${height} with TXID ${txid}.`);
+    logger.debug(`Saved L-BTC peg from Liquid block height #${height} with TXID ${txid}.`);
+
+    if (amount > 0) { // Peg-in
+  
+      // Add the address to the federation addresses table
+      await DB.query(`INSERT IGNORE INTO federation_addresses (bitcoinaddress) VALUES (?)`, [bitcoinaddress]);
+
+      // Add the UTXO to the federation txos table
+      const query_utxos = `INSERT IGNORE INTO federation_txos (txid, txindex, bitcoinaddress, amount, blocknumber, blocktime, unspent, lastblockupdate, lasttimeupdate, timelock, expiredAt, emergencyKey, pegtxid, pegindex, pegblocktime) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`;
+      const params_utxos: (string | number)[] = [bitcointxid, bitcoinindex, bitcoinaddress, amount, bitcoinblock, bitcoinBlockTime, 1, bitcoinblock - 1, 0, 4032, 0, 0, txid, txindex, blockTime];
+      await DB.query(query_utxos, params_utxos);
+      const [minBlockUpdate] = await DB.query(`SELECT MIN(lastblockupdate) AS lastblockupdate FROM federation_txos WHERE unspent = 1`)
+      await this.$saveLastBlockAuditToDatabase(minBlockUpdate[0]['lastblockupdate']);
+      logger.debug(`Saved new Federation UTXO ${bitcointxid}:${bitcoinindex} belonging to ${bitcoinaddress} to federation txos`);
+
+    }
   }
 
   protected async $getLatestBlockHeightFromDatabase(): Promise<number> {
@@ -98,6 +112,382 @@ class ElementsParser {
     const query = `UPDATE state SET number = ? WHERE name = 'last_elements_block'`;
     await DB.query(query, [blockHeight]);
   }
+
+  ///////////// FEDERATION AUDIT //////////////
+
+  public async $updateFederationUtxos() {
+    if (this.isUtxosUpdatingRunning) {
+      return;
+    }
+
+    this.isUtxosUpdatingRunning = true;
+
+    try {
+      let auditProgress = await this.$getAuditProgress();
+      // If no peg in transaction was found in the database, return
+      if (!auditProgress.lastBlockAudit) {
+        logger.debug(`No Federation UTXOs found in the database. Waiting for some to be confirmed before starting the Federation UTXOs audit`);
+        this.isUtxosUpdatingRunning = false;
+        return;
+      }
+
+      const bitcoinBlocksToSync = await this.$getBitcoinBlockchainState();
+      // If the bitcoin blockchain is not synced yet, return
+      if (bitcoinBlocksToSync.bitcoinHeaders > bitcoinBlocksToSync.bitcoinBlocks + 1) {
+        logger.debug(`Bitcoin client is not synced yet. ${bitcoinBlocksToSync.bitcoinHeaders - bitcoinBlocksToSync.bitcoinBlocks} blocks remaining to sync before the Federation audit process can start`);
+        this.isUtxosUpdatingRunning = false;
+        return;
+      }
+
+      auditProgress.lastBlockAudit++;
+
+      // Logging
+      let indexedThisRun = 0;
+      let timer = Date.now() / 1000;
+      const startedAt = Date.now() / 1000;
+      const indexingSpeeds: number[] = [];
+
+      while (auditProgress.lastBlockAudit <= auditProgress.confirmedTip) {
+
+        // First, get the current UTXOs that need to be scanned in the block
+        const utxos = await this.$getFederationUtxosToScan(auditProgress.lastBlockAudit);
+
+        // Get the peg-out addresses that need to be scanned
+        const redeemAddresses = await this.$getRedeemAddressesToScan();
+
+        // The fast way: check if these UTXOs are still unspent as of the current block with gettxout
+        let spentAsTip: any[];
+        let unspentAsTip: any[];
+        if (auditProgress.confirmedTip - auditProgress.lastBlockAudit <= 150) { // If the audit status is not too far in the past, we can use gettxout (fast way)
+          const utxosToParse = await this.$getFederationUtxosToParse(utxos);
+          spentAsTip = utxosToParse.spentAsTip;
+          unspentAsTip = utxosToParse.unspentAsTip;
+          logger.debug(`Found ${utxos.length} Federation UTXOs and ${redeemAddresses.length} Peg-Out Addresses to scan in Bitcoin block height #${auditProgress.lastBlockAudit} / #${auditProgress.confirmedTip}`);
+          logger.debug(`${unspentAsTip.length} / ${utxos.length} Federation UTXOs are unspent as of tip`);
+        } else { // If the audit status is too far in the past, it is useless and wasteful to look for still unspent txos since they will all be spent as of the tip
+          spentAsTip = utxos;
+          unspentAsTip = [];
+
+          // Logging
+          const elapsedSeconds = (Date.now() / 1000) - timer;
+          if (elapsedSeconds > 5) {
+            const runningFor = (Date.now() / 1000) - startedAt;
+            const blockPerSeconds = indexedThisRun / elapsedSeconds;
+            indexingSpeeds.push(blockPerSeconds);
+            if (indexingSpeeds.length > 100) indexingSpeeds.shift(); // Keep the length of the up to 100 last indexing speeds
+            const meanIndexingSpeed = indexingSpeeds.reduce((a, b) => a + b, 0) / indexingSpeeds.length;
+            const eta = (auditProgress.confirmedTip - auditProgress.lastBlockAudit) / meanIndexingSpeed;
+            logger.debug(`Scanning ${utxos.length} Federation UTXOs and ${redeemAddresses.length} Peg-Out Addresses at Bitcoin block height #${auditProgress.lastBlockAudit} / #${auditProgress.confirmedTip} | ~${meanIndexingSpeed.toFixed(2)} blocks/sec | elapsed: ${(runningFor / 60).toFixed(0)} minutes | ETA: ${(eta / 60).toFixed(0)} minutes`);
+            timer = Date.now() / 1000;
+            indexedThisRun = 0;
+          }
+        }
+
+        // The slow way: parse the block to look for the spending tx
+        const blockHash: IBitcoinApi.ChainTips = await bitcoinSecondClient.getBlockHash(auditProgress.lastBlockAudit);
+        const block: IBitcoinApi.Block = await bitcoinSecondClient.getBlock(blockHash, 2);
+        await this.$parseBitcoinBlock(block, spentAsTip, unspentAsTip, auditProgress.confirmedTip, redeemAddresses);
+
+        // Finally, update the lastblockupdate of the remaining UTXOs and save to the database
+        const [minBlockUpdate] = await DB.query(`SELECT MIN(lastblockupdate) AS lastblockupdate FROM federation_txos WHERE unspent = 1`)
+        await this.$saveLastBlockAuditToDatabase(minBlockUpdate[0]['lastblockupdate']);
+
+        auditProgress = await this.$getAuditProgress();
+        auditProgress.lastBlockAudit++;
+        indexedThisRun++;
+      }
+
+      this.isUtxosUpdatingRunning = false;
+    } catch (e) {
+      this.isUtxosUpdatingRunning = false;
+      throw new Error(e instanceof Error ? e.message : 'Error');
+    } 
+  }
+
+  // Get the UTXOs that need to be scanned in block height (UTXOs that were last updated in the block height - 1)
+  protected async $getFederationUtxosToScan(height: number) { 
+    const query = `SELECT txid, txindex, bitcoinaddress, amount, blocknumber, timelock, expiredAt FROM federation_txos WHERE lastblockupdate = ? AND unspent = 1`;
+    const [rows] = await DB.query(query, [height - 1]);
+    return rows as any[];
+  }
+
+  // Returns the UTXOs that are spent as of tip and need to be scanned
+  protected async $getFederationUtxosToParse(utxos: any[]): Promise<any> {
+    const spentAsTip: any[] = [];
+    const unspentAsTip: any[] = [];
+
+    for (const utxo of utxos) {
+      const result = await bitcoinSecondClient.getTxOut(utxo.txid, utxo.txindex, false);
+      result ? unspentAsTip.push(utxo) : spentAsTip.push(utxo);
+    }
+    
+    return {spentAsTip, unspentAsTip};
+  }
+
+  protected async $parseBitcoinBlock(block: IBitcoinApi.Block, spentAsTip: any[], unspentAsTip: any[], confirmedTip: number, redeemAddressesData: any[] = []) {
+    const redeemAddresses: string[] = redeemAddressesData.map(redeemAddress => redeemAddress.bitcoinaddress);
+    for (const tx of block.tx) {
+      let mightRedeemInThisTx = false;
+      // Check if the Federation UTXOs that was spent as of tip are spent in this block
+      for (const input of tx.vin) {
+        const txo = spentAsTip.find(txo => txo.txid === input.txid && txo.txindex === input.vout);
+        if (txo) {
+          mightRedeemInThisTx = true; // A Federation UTXO is spent in this block: we might find a peg-out address in the outputs
+          if (txo.expiredAt > 0 ) {
+            if (input.txinwitness?.length !== 13) { // Check if the witness data of the input contains the 11 signatures: if it doesn't, emergency keys are being used
+              await DB.query(`UPDATE federation_txos SET unspent = 0, lastblockupdate = ?, lasttimeupdate = ?, emergencyKey = 1 WHERE txid = ? AND txindex = ?`, [block.height, block.time, txo.txid, txo.txindex]);
+              logger.debug(`Expired Federation UTXO ${txo.txid}:${txo.txindex} (${txo.amount} sats) was spent in block ${block.height} using emergency keys!`);
+             } else {
+              await DB.query(`UPDATE federation_txos SET unspent = 0, lastblockupdate = ?, lasttimeupdate = ? WHERE txid = ? AND txindex = ?`, [block.height, block.time, txo.txid, txo.txindex]);
+              logger.debug(`Expired Federation UTXO ${txo.txid}:${txo.txindex} (${txo.amount} sats) was spent in block ${block.height} using regular 11-of-15 signatures`);
+            }
+          } else {
+            await DB.query(`UPDATE federation_txos SET unspent = 0, lastblockupdate = ?, lasttimeupdate = ? WHERE txid = ? AND txindex = ?`, [block.height, block.time, txo.txid, txo.txindex]);
+            logger.debug(`Federation UTXO ${txo.txid}:${txo.txindex} (${txo.amount} sats) was spent in block ${block.height}`);
+          }
+          // Remove the TXO from the utxo array
+          spentAsTip.splice(spentAsTip.indexOf(txo), 1);
+        }
+      }
+      // Check if an output is sent to a change address of the federation
+      for (const output of tx.vout) {
+        if (output.scriptPubKey.address && federationChangeAddresses.includes(output.scriptPubKey.address)) {
+          // Check that the UTXO was not already added in the DB by previous scans
+          const [rows_check] = await DB.query(`SELECT txid FROM federation_txos WHERE txid = ? AND txindex = ?`, [tx.txid, output.n]) as any[];
+          if (rows_check.length === 0) {
+            const timelock = output.scriptPubKey.address === federationChangeAddresses[0] ? 4032 : 2016; // P2WSH change address has a 4032 timelock, P2SH change address has a 2016 timelock
+            const query_utxos = `INSERT INTO federation_txos (txid, txindex, bitcoinaddress, amount, blocknumber, blocktime, unspent, lastblockupdate, lasttimeupdate, timelock, expiredAt, emergencyKey, pegtxid, pegindex, pegblocktime) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`;
+            const params_utxos: (string | number)[] = [tx.txid, output.n, output.scriptPubKey.address, output.value * 100000000, block.height, block.time, 1, block.height, 0, timelock, 0, 0, '', 0, 0];
+            await DB.query(query_utxos, params_utxos);
+            // Add the UTXO to the utxo array
+            spentAsTip.push({
+              txid: tx.txid,
+              txindex: output.n,
+              bitcoinaddress: output.scriptPubKey.address,
+              amount: output.value * 100000000,
+              blocknumber: block.height,
+              timelock: timelock,
+              expiredAt: 0,
+            });
+            logger.debug(`Added new Federation UTXO ${tx.txid}:${output.n} (${Math.round(output.value * 100000000)} sats), change address: ${output.scriptPubKey.address}`);
+          }
+        }
+        if (mightRedeemInThisTx && output.scriptPubKey.address && redeemAddresses.includes(output.scriptPubKey.address)) {
+          // Find the number of times output.scriptPubKey.address appears in redeemAddresses. There can be address reuse for peg-outs...
+          const matchingAddress: any[] = redeemAddressesData.filter(redeemAddress => redeemAddress.bitcoinaddress === output.scriptPubKey.address && -redeemAddress.amount === Math.round(output.value * 100000000));
+          if (matchingAddress.length > 0) {
+            if (matchingAddress.length > 1) {
+              // If there are more than one peg out address with the same amount, we can't know which one redeemed the UTXO: we take the oldest one
+              matchingAddress.sort((a, b) => a.datetime - b.datetime);
+              logger.debug(`Found redeem txid ${tx.txid}:${output.n} to peg-out address ${matchingAddress[0].bitcoinaddress}, amount ${matchingAddress[0].amount}, datetime ${matchingAddress[0].datetime}`);
+            } else {
+              logger.debug(`Found redeem txid ${tx.txid}:${output.n} to peg-out address ${matchingAddress[0].bitcoinaddress}, amount ${matchingAddress[0].amount}`);
+            }
+            const query_add_redeem = `UPDATE elements_pegs SET bitcointxid = ?, bitcoinindex = ? WHERE bitcoinaddress = ? AND amount = ? AND datetime = ?`;
+            const params_add_redeem: (string | number)[] = [tx.txid, output.n, matchingAddress[0].bitcoinaddress, matchingAddress[0].amount, matchingAddress[0].datetime];
+            await DB.query(query_add_redeem, params_add_redeem);
+            const index = redeemAddressesData.indexOf(matchingAddress[0]);
+            redeemAddressesData.splice(index, 1);
+            redeemAddresses.splice(index, 1);
+          } else { // The output amount does not match the peg-out amount... log it
+            logger.debug(`Found redeem txid ${tx.txid}:${output.n} to peg-out address ${output.scriptPubKey.address} but output amount ${Math.round(output.value * 100000000)} does not match the peg-out amount!`);
+          }
+        }
+      }
+    }
+
+    for (const utxo of spentAsTip) {   
+      if (utxo.expiredAt === 0 && block.height >= utxo.blocknumber + utxo.timelock) { // The UTXO is expiring in this block
+        await DB.query(`UPDATE federation_txos SET lastblockupdate = ?, expiredAt = ? WHERE txid = ? AND txindex = ?`, [block.height, block.time, utxo.txid, utxo.txindex]);
+      } else {
+        await DB.query(`UPDATE federation_txos SET lastblockupdate = ? WHERE txid = ? AND txindex = ?`, [block.height, utxo.txid, utxo.txindex]);
+      }
+    }
+
+    for (const utxo of unspentAsTip) {
+      if (utxo.expiredAt === 0 && block.height >= utxo.blocknumber + utxo.timelock) { // The UTXO is expiring in this block
+        await DB.query(`UPDATE federation_txos SET unspent = 0, lastblockupdate = ?, expiredAt = ? WHERE txid = ? AND txindex = ?`, [confirmedTip, block.time, utxo.txid, utxo.txindex]);
+      } else if (utxo.expiredAt === 0 && confirmedTip >= utxo.blocknumber + utxo.timelock) { // The UTXO is expiring before the tip: we need to keep track of it
+        await DB.query(`UPDATE federation_txos SET lastblockupdate = ? WHERE txid = ? AND txindex = ?`, [utxo.blocknumber + utxo.timelock - 1, utxo.txid, utxo.txindex]); 
+      } else {
+      await DB.query(`UPDATE federation_txos SET lastblockupdate = ? WHERE txid = ? AND txindex = ?`, [confirmedTip, utxo.txid, utxo.txindex]);
+      }
+    }
+  }
+
+  protected async $saveLastBlockAuditToDatabase(blockHeight: number) {
+    const query = `UPDATE state SET number = ? WHERE name = 'last_bitcoin_block_audit'`;
+    await DB.query(query, [blockHeight]);
+  }
+
+  // Get the bitcoin block where the audit process was last updated
+  protected async $getAuditProgress(): Promise<any> {
+    const lastblockaudit = await this.$getLastBlockAudit();
+    const bitcoinBlocksToSync = await this.$getBitcoinBlockchainState();
+    return {
+      lastBlockAudit: lastblockaudit,
+      confirmedTip: bitcoinBlocksToSync.bitcoinBlocks - auditBlockOffsetWithTip,
+    };
+  }
+
+  // Get the bitcoin blocks remaining to be synced
+  protected async $getBitcoinBlockchainState(): Promise<any> {
+    const result = await bitcoinSecondClient.getBlockchainInfo();
+    return {
+      bitcoinBlocks: result.blocks,
+      bitcoinHeaders: result.headers,
+    }
+  }
+
+  protected async $getLastBlockAudit(): Promise<number> {
+    const query = `SELECT number FROM state WHERE name = 'last_bitcoin_block_audit'`;
+    const [rows] = await DB.query(query);
+    return rows[0]['number'];
+  }
+
+  protected async $getRedeemAddressesToScan(): Promise<any[]> {
+    const query = `SELECT datetime, amount, bitcoinaddress FROM elements_pegs where amount < 0 AND bitcoinaddress != '' AND bitcointxid = '';`;
+    const [rows]: any[] = await DB.query(query);
+    return rows;
+  }
+
+  protected isDust(amount: number, feeRate: number): boolean {
+    return amount <= (450 * feeRate); // A P2WSH 11-of-15 multisig input is around 450 bytes
+  }
+
+  ///////////// DATA QUERY //////////////
+
+  public async $getAuditStatus(): Promise<any> {
+    const lastBlockAudit = await this.$getLastBlockAudit();
+    const bitcoinBlocksToSync = await this.$getBitcoinBlockchainState();
+    return {
+      bitcoinBlocks: bitcoinBlocksToSync.bitcoinBlocks,
+      bitcoinHeaders: bitcoinBlocksToSync.bitcoinHeaders,
+      lastBlockAudit: lastBlockAudit,
+      isAuditSynced: bitcoinBlocksToSync.bitcoinHeaders - bitcoinBlocksToSync.bitcoinBlocks <= 2 && bitcoinBlocksToSync.bitcoinBlocks - lastBlockAudit <= 3,
+    };
+  }
+
+  public async $getPegDataByMonth(): Promise<any> {
+    const query = `SELECT SUM(amount) AS amount, DATE_FORMAT(FROM_UNIXTIME(datetime), '%Y-%m-01') AS date FROM elements_pegs GROUP BY DATE_FORMAT(FROM_UNIXTIME(datetime), '%Y%m')`;
+    const [rows] = await DB.query(query);
+    return rows;
+  }
+
+  public async $getFederationReservesByMonth(): Promise<any> {
+    const query = `
+    SELECT SUM(amount) AS amount, DATE_FORMAT(FROM_UNIXTIME(blocktime), '%Y-%m-01') AS date FROM federation_txos 
+    WHERE
+        (blocktime > UNIX_TIMESTAMP(LAST_DAY(FROM_UNIXTIME(blocktime) - INTERVAL 1 MONTH) + INTERVAL 1 DAY))
+      AND 
+        ((unspent = 1) OR (unspent = 0 AND lasttimeupdate > UNIX_TIMESTAMP(LAST_DAY(FROM_UNIXTIME(blocktime)) + INTERVAL 1 DAY)))
+      AND 
+        (expiredAt = 0 OR expiredAt > UNIX_TIMESTAMP(LAST_DAY(FROM_UNIXTIME(blocktime)) + INTERVAL 1 DAY))
+    GROUP BY 
+        date;`;          
+    const [rows] = await DB.query(query);
+    return rows;
+  }
+
+  // Get the current L-BTC pegs and the last Liquid block it was updated
+  public async $getCurrentLbtcSupply(): Promise<any> {
+    const [rows] = await DB.query(`SELECT SUM(amount) AS LBTC_supply FROM elements_pegs;`);
+    const lastblockupdate = await this.$getLatestBlockHeightFromDatabase();
+    const hash = await bitcoinClient.getBlockHash(lastblockupdate);
+    return {
+      amount: rows[0]['LBTC_supply'],
+      lastBlockUpdate: lastblockupdate,
+      hash: hash
+    };
+  }
+
+  // Get the current reserves of the federation and the last Bitcoin block it was updated
+  public async $getCurrentFederationReserves(): Promise<any> {
+    const [rows] = await DB.query(`SELECT SUM(amount) AS total_balance FROM federation_txos WHERE unspent = 1 AND expiredAt = 0;`);
+    const lastblockaudit = await this.$getLastBlockAudit();
+    const hash = await bitcoinSecondClient.getBlockHash(lastblockaudit);
+    return {
+      amount: rows[0]['total_balance'],
+      lastBlockUpdate: lastblockaudit,
+      hash: hash
+    };
+  }
+
+  // Get all of the federation addresses, most balances first
+  public async $getFederationAddresses(): Promise<any> {
+    const query = `SELECT bitcoinaddress, SUM(amount) AS balance FROM federation_txos WHERE unspent = 1 AND expiredAt = 0 GROUP BY bitcoinaddress ORDER BY balance DESC;`;
+    const [rows] = await DB.query(query);
+    return rows;
+  }
+
+  // Get all of the UTXOs held by the federation, most recent first
+  public async $getFederationUtxos(): Promise<any> {
+    const query = `SELECT txid, txindex, bitcoinaddress, amount, blocknumber, blocktime, pegtxid, pegindex, pegblocktime, timelock, expiredAt FROM federation_txos WHERE unspent = 1 AND expiredAt = 0 ORDER BY blocktime DESC;`;
+    const [rows] = await DB.query(query);
+    return rows;
+  }
+
+  // Get expired UTXOs, most recent first
+  public async $getExpiredUtxos(): Promise<any> {
+    const query = `SELECT txid, txindex, bitcoinaddress, amount, blocknumber, blocktime, pegtxid, pegindex, pegblocktime, timelock, expiredAt FROM federation_txos WHERE unspent = 1 AND expiredAt > 0 ORDER BY blocktime DESC;`;
+    const [rows]: any[] = await DB.query(query);
+    const feeRate = Math.round((await bitcoinSecondClient.estimateSmartFee(1)).feerate * 100000000 / 1000);
+    for (const row of rows) {
+      row.isDust = this.isDust(row.amount, feeRate);
+    }
+    return rows;
+  }
+
+    // Get utxos that were spent using emergency keys
+    public async $getEmergencySpentUtxos(): Promise<any> {
+      const query = `SELECT txid, txindex, bitcoinaddress, amount, blocknumber, blocktime, pegtxid, pegindex, pegblocktime, timelock, expiredAt FROM federation_txos WHERE emergencyKey = 1 ORDER BY blocktime DESC;`;
+      const [rows] = await DB.query(query);
+      return rows;
+    }
+  
+  // Get the total number of federation addresses
+  public async $getFederationAddressesNumber(): Promise<any> {
+    const query = `SELECT COUNT(DISTINCT bitcoinaddress) AS address_count FROM federation_txos WHERE unspent = 1 AND expiredAt = 0;`;
+    const [rows] = await DB.query(query);
+    return rows[0];
+  }
+
+  // Get the total number of federation utxos
+  public async $getFederationUtxosNumber(): Promise<any> {
+    const query = `SELECT COUNT(*) AS utxo_count FROM federation_txos WHERE unspent = 1 AND expiredAt = 0;`;
+    const [rows] = await DB.query(query);
+    return rows[0];
+  }
+
+  // Get the total number of emergency spent utxos and their total amount
+  public async $getEmergencySpentUtxosStats(): Promise<any> {
+    const query = `SELECT COUNT(*) AS utxo_count, SUM(amount) AS total_amount FROM federation_txos WHERE emergencyKey = 1;`;
+    const [rows] = await DB.query(query);
+    return rows[0];
+  }
+
+  // Get recent pegs in / out
+  public async $getPegsList(count: number = 0): Promise<any> {
+    const query = `SELECT txid, txindex, amount, bitcoinaddress, bitcointxid, bitcoinindex, datetime AS blocktime FROM elements_pegs ORDER BY block DESC LIMIT 15 OFFSET ?;`;
+    const [rows] = await DB.query(query, [count]);
+    return rows;
+  }
+
+  // Get all peg in / out from the last month
+  public async $getPegsVolumeDaily(): Promise<any> {
+    const pegInQuery = await DB.query(`SELECT SUM(amount) AS volume, COUNT(*) AS number FROM elements_pegs WHERE amount > 0 and datetime > UNIX_TIMESTAMP(TIMESTAMPADD(DAY, -1, CURRENT_TIMESTAMP()));`);
+    const pegOutQuery = await DB.query(`SELECT SUM(amount) AS volume, COUNT(*) AS number FROM elements_pegs WHERE amount < 0 and datetime > UNIX_TIMESTAMP(TIMESTAMPADD(DAY, -1, CURRENT_TIMESTAMP()));`);
+    return [
+      pegInQuery[0][0],
+      pegOutQuery[0][0]
+    ];
+  }
+
+  // Get the total pegs number
+  public async $getPegsCount(): Promise<any> {
+    const [rows] = await DB.query(`SELECT COUNT(*) AS pegs_count FROM elements_pegs;`);
+    return rows[0];
+  }
 }
 
 export default new ElementsParser();

backend/src/api/liquid/liquid.routes.ts

@@ -15,7 +15,21 @@ class LiquidRoutes {
     
     if (config.DATABASE.ENABLED) {
       app
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/pegs', this.$getElementsPegs)
         .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/pegs/month', this.$getElementsPegsByMonth)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/pegs/list/:count', this.$getPegsList)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/pegs/volume', this.$getPegsVolumeDaily)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/pegs/count', this.$getPegsCount)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves', this.$getFederationReserves)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/month', this.$getFederationReservesByMonth)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/addresses', this.$getFederationAddresses)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/addresses/total', this.$getFederationAddressesNumber)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/utxos', this.$getFederationUtxos)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/utxos/total', this.$getFederationUtxosNumber)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/utxos/expired', this.$getExpiredUtxos)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/utxos/emergency-spent', this.$getEmergencySpentUtxos)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/utxos/emergency-spent/stats', this.$getEmergencySpentUtxosStats)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/reserves/status', this.$getFederationAuditStatus)
         ;
     }
   }
@@ -63,11 +77,183 @@ class LiquidRoutes {
   private async $getElementsPegsByMonth(req: Request, res: Response) {
     try {
       const pegs = await elementsParser.$getPegDataByMonth();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60 * 60).toUTCString());
       res.json(pegs);
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
   }
+
+  private async $getFederationReservesByMonth(req: Request, res: Response) {
+    try {
+      const reserves = await elementsParser.$getFederationReservesByMonth();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60 * 60).toUTCString());
+      res.json(reserves);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getElementsPegs(req: Request, res: Response) {
+    try {
+      const currentSupply = await elementsParser.$getCurrentLbtcSupply();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(currentSupply);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getFederationReserves(req: Request, res: Response) {
+    try {
+      const currentReserves = await elementsParser.$getCurrentFederationReserves();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(currentReserves);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getFederationAuditStatus(req: Request, res: Response) {
+    try {
+      const auditStatus = await elementsParser.$getAuditStatus();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(auditStatus);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getFederationAddresses(req: Request, res: Response) {
+    try {
+      const federationAddresses = await elementsParser.$getFederationAddresses();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(federationAddresses);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getFederationAddressesNumber(req: Request, res: Response) {
+    try {
+      const federationAddresses = await elementsParser.$getFederationAddressesNumber();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(federationAddresses);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getFederationUtxos(req: Request, res: Response) {
+    try {
+      const federationUtxos = await elementsParser.$getFederationUtxos();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(federationUtxos);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getExpiredUtxos(req: Request, res: Response) {
+    try {
+      const expiredUtxos = await elementsParser.$getExpiredUtxos();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(expiredUtxos);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getFederationUtxosNumber(req: Request, res: Response) {
+    try {
+      const federationUtxos = await elementsParser.$getFederationUtxosNumber();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(federationUtxos);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getEmergencySpentUtxos(req: Request, res: Response) {
+    try {
+      const emergencySpentUtxos = await elementsParser.$getEmergencySpentUtxos();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(emergencySpentUtxos);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getEmergencySpentUtxosStats(req: Request, res: Response) {
+    try {
+      const emergencySpentUtxos = await elementsParser.$getEmergencySpentUtxosStats();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(emergencySpentUtxos);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getPegsList(req: Request, res: Response) {
+    try {
+      const recentPegs = await elementsParser.$getPegsList(parseInt(req.params?.count));
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(recentPegs);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getPegsVolumeDaily(req: Request, res: Response) {
+    try {
+      const pegsVolume = await elementsParser.$getPegsVolumeDaily();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(pegsVolume);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getPegsCount(req: Request, res: Response) {
+    try {
+      const pegsCount = await elementsParser.$getPegsCount();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+      res.json(pegsCount);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
 }
 
 export default new LiquidRoutes();

backend/src/api/mempool-blocks.ts

@@ -1,6 +1,6 @@
 import { GbtGenerator, GbtResult, ThreadTransaction as RustThreadTransaction, ThreadAcceleration as RustThreadAcceleration } from 'rust-gbt';
 import logger from '../logger';
-import { MempoolBlock, MempoolTransactionExtended, TransactionStripped, MempoolBlockWithTransactions, MempoolBlockDelta, Ancestor, CompactThreadTransaction, EffectiveFeeStats, PoolTag } from '../mempool.interfaces';
+import { MempoolBlock, MempoolTransactionExtended, MempoolBlockWithTransactions, MempoolBlockDelta, Ancestor, CompactThreadTransaction, EffectiveFeeStats, TransactionClassified, TransactionCompressed, MempoolDeltaChange, GbtCandidates } from '../mempool.interfaces';
 import { Common, OnlineFeeStatsCalculator } from './common';
 import config from '../config';
 import { Worker } from 'worker_threads';
@@ -18,6 +18,7 @@ class MempoolBlocks {
 
   private nextUid: number = 1;
   private uidMap: Map<number, string> = new Map(); // map short numerical uids to full txids
+  private txidMap: Map<string, number> = new Map(); // map full txids back to short numerical uids
 
   public getMempoolBlocks(): MempoolBlock[] {
     return this.mempoolBlocks.map((block) => {
@@ -40,138 +41,12 @@ class MempoolBlocks {
     return this.mempoolBlockDeltas;
   }
 
-  public updateMempoolBlocks(memPool: { [txid: string]: MempoolTransactionExtended }, saveResults: boolean = false): MempoolBlockWithTransactions[] {
-    const latestMempool = memPool;
-    const memPoolArray: MempoolTransactionExtended[] = [];
-    for (const i in latestMempool) {
-      memPoolArray.push(latestMempool[i]);
-    }
-    const start = new Date().getTime();
-
-    // Clear bestDescendants & ancestors
-    memPoolArray.forEach((tx) => {
-      tx.bestDescendant = null;
-      tx.ancestors = [];
-      tx.cpfpChecked = false;
-      if (!tx.effectiveFeePerVsize) {
-        tx.effectiveFeePerVsize = tx.adjustedFeePerVsize;
-      }
-    });
-
-    // First sort
-    memPoolArray.sort((a, b) => {
-      if (a.adjustedFeePerVsize === b.adjustedFeePerVsize) {
-        // tie-break by lexicographic txid order for stability
-        return a.txid < b.txid ? -1 : 1;
-      } else {
-        return b.adjustedFeePerVsize - a.adjustedFeePerVsize;
-      }
-    });
-
-    // Loop through and traverse all ancestors and sum up all the sizes + fees
-    // Pass down size + fee to all unconfirmed children
-    let sizes = 0;
-    memPoolArray.forEach((tx) => {
-      sizes += tx.weight;
-      if (sizes > 4000000 * 8) {
-        return;
-      }
-      Common.setRelativesAndGetCpfpInfo(tx, memPool);
-    });
-
-    // Final sort, by effective fee
-    memPoolArray.sort((a, b) => {
-      if (a.effectiveFeePerVsize === b.effectiveFeePerVsize) {
-        // tie-break by lexicographic txid order for stability
-        return a.txid < b.txid ? -1 : 1;
-      } else {
-        return b.effectiveFeePerVsize - a.effectiveFeePerVsize;
-      }
-    });
-
-    const end = new Date().getTime();
-    const time = end - start;
-    logger.debug('Mempool blocks calculated in ' + time / 1000 + ' seconds');
-
-    const blocks = this.calculateMempoolBlocks(memPoolArray);
-
-    if (saveResults) {
-      const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, blocks);
-      this.mempoolBlocks = blocks;
-      this.mempoolBlockDeltas = deltas;
-    }
-
-    return blocks;
-  }
-
-  private calculateMempoolBlocks(transactionsSorted: MempoolTransactionExtended[]): MempoolBlockWithTransactions[] {
-    const mempoolBlocks: MempoolBlockWithTransactions[] = [];
-    let feeStatsCalculator: OnlineFeeStatsCalculator = new OnlineFeeStatsCalculator(config.MEMPOOL.BLOCK_WEIGHT_UNITS);
-    let onlineStats = false;
-    let blockSize = 0;
-    let blockWeight = 0;
-    let blockVsize = 0;
-    let blockFees = 0;
-    const sizeLimit = (config.MEMPOOL.BLOCK_WEIGHT_UNITS / 4) * 1.2;
-    let transactionIds: string[] = [];
-    let transactions: MempoolTransactionExtended[] = [];
-    transactionsSorted.forEach((tx, index) => {
-      if (blockWeight + tx.weight <= config.MEMPOOL.BLOCK_WEIGHT_UNITS
-        || mempoolBlocks.length === config.MEMPOOL.MEMPOOL_BLOCKS_AMOUNT - 1) {
-        tx.position = {
-          block: mempoolBlocks.length,
-          vsize: blockVsize + (tx.vsize / 2),
-        };
-        blockWeight += tx.weight;
-        blockVsize += tx.vsize;
-        blockSize += tx.size;
-        blockFees += tx.fee;
-        if (blockVsize <= sizeLimit) {
-          transactions.push(tx);
-        }
-        transactionIds.push(tx.txid);
-        if (onlineStats) {
-          feeStatsCalculator.processNext(tx);
-        }
-      } else {
-        mempoolBlocks.push(this.dataToMempoolBlocks(transactionIds, transactions, blockSize, blockWeight, blockFees));
-        blockVsize = 0;
-        tx.position = {
-          block: mempoolBlocks.length,
-          vsize: blockVsize + (tx.vsize / 2),
-        };
-
-        if (mempoolBlocks.length === config.MEMPOOL.MEMPOOL_BLOCKS_AMOUNT - 1) {
-          const stackWeight = transactionsSorted.slice(index).reduce((total, tx) => total + (tx.weight || 0), 0);
-          if (stackWeight > config.MEMPOOL.BLOCK_WEIGHT_UNITS) {
-            onlineStats = true;
-            feeStatsCalculator = new OnlineFeeStatsCalculator(stackWeight, 0.5, [10, 20, 30, 40, 50, 60, 70, 80, 90]);
-            feeStatsCalculator.processNext(tx);
-          }
-        }
-
-        blockVsize += tx.vsize;
-        blockWeight = tx.weight;
-        blockSize = tx.size;
-        blockFees = tx.fee;
-        transactionIds = [tx.txid];
-        transactions = [tx];
-      }
-    });
-    if (transactions.length) {
-      const feeStats = onlineStats ? feeStatsCalculator.getRawFeeStats() : undefined;
-      mempoolBlocks.push(this.dataToMempoolBlocks(transactionIds, transactions, blockSize, blockWeight, blockFees, feeStats));
-    }
-
-    return mempoolBlocks;
-  }
-
   private calculateMempoolDeltas(prevBlocks: MempoolBlockWithTransactions[], mempoolBlocks: MempoolBlockWithTransactions[]): MempoolBlockDelta[] {
     const mempoolBlockDeltas: MempoolBlockDelta[] = [];
     for (let i = 0; i < Math.max(mempoolBlocks.length, prevBlocks.length); i++) {
-      let added: TransactionStripped[] = [];
+      let added: TransactionClassified[] = [];
       let removed: string[] = [];
-      const changed: { txid: string, rate: number | undefined, acc: boolean | undefined }[] = [];
+      const changed: TransactionClassified[] = [];
       if (mempoolBlocks[i] && !prevBlocks[i]) {
         added = mempoolBlocks[i].transactions;
       } else if (!mempoolBlocks[i] && prevBlocks[i]) {
@@ -194,20 +69,20 @@ class MempoolBlocks {
           if (!prevIds[tx.txid]) {
             added.push(tx);
           } else if (tx.rate !== prevIds[tx.txid].rate || tx.acc !== prevIds[tx.txid].acc) {
-            changed.push({ txid: tx.txid, rate: tx.rate, acc: tx.acc });
+            changed.push(tx);
           }
         });
       }
       mempoolBlockDeltas.push({
-        added,
+        added: added.map(this.compressTx),
         removed,
-        changed,
+        changed: changed.map(this.compressDeltaChange),
       });
     }
     return mempoolBlockDeltas;
   }
 
-  public async $makeBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, saveResults: boolean = false, useAccelerations: boolean = false, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
+  public async $makeBlockTemplates(transactions: string[], newMempool: { [txid: string]: MempoolTransactionExtended }, candidates: GbtCandidates | undefined, saveResults: boolean = false, useAccelerations: boolean = false, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
     const start = Date.now();
 
     // reset mempool short ids
@@ -215,7 +90,8 @@ class MempoolBlocks {
       this.resetUids();
     }
     // set missing short ids
-    for (const tx of Object.values(newMempool)) {
+    for (const txid of transactions) {
+      const tx = newMempool[txid];
       this.setUid(tx, !saveResults);
     }
 
@@ -224,7 +100,8 @@ class MempoolBlocks {
     // prepare a stripped down version of the mempool with only the minimum necessary data
     // to reduce the overhead of passing this data to the worker thread
     const strippedMempool: Map<number, CompactThreadTransaction> = new Map();
-    Object.values(newMempool).forEach(entry => {
+    for (const txid of transactions) {
+      const entry = newMempool[txid];
       if (entry.uid !== null && entry.uid !== undefined) {
         const stripped = {
           uid: entry.uid,
@@ -237,7 +114,7 @@ class MempoolBlocks {
         };
         strippedMempool.set(entry.uid, stripped);
       }
-    });
+    }
 
     // (re)initialize tx selection worker thread
     if (!this.txSelectionWorker) {
@@ -268,7 +145,7 @@ class MempoolBlocks {
       // clean up thread error listener
       this.txSelectionWorker?.removeListener('error', threadErrorListener);
 
-      const processed = this.processBlockTemplates(newMempool, blocks, null, Object.entries(rates), Object.values(clusters), accelerations, accelerationPool, saveResults);
+      const processed = this.processBlockTemplates(newMempool, blocks, null, Object.entries(rates), Object.values(clusters), candidates, accelerations, accelerationPool, saveResults);
 
       logger.debug(`makeBlockTemplates completed in ${(Date.now() - start)/1000} seconds`);
 
@@ -279,10 +156,10 @@ class MempoolBlocks {
     return this.mempoolBlocks;
   }
 
-  public async $updateBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, added: MempoolTransactionExtended[], removed: MempoolTransactionExtended[], accelerationDelta: string[] = [], saveResults: boolean = false, useAccelerations: boolean = false): Promise<void> {
+  public async $updateBlockTemplates(transactions: string[], newMempool: { [txid: string]: MempoolTransactionExtended }, added: MempoolTransactionExtended[], removed: MempoolTransactionExtended[], candidates: GbtCandidates | undefined, accelerationDelta: string[] = [], saveResults: boolean = false, useAccelerations: boolean = false): Promise<void> {
     if (!this.txSelectionWorker) {
       // need to reset the worker
-      await this.$makeBlockTemplates(newMempool, saveResults, useAccelerations);
+      await this.$makeBlockTemplates(transactions, newMempool, candidates, saveResults, useAccelerations);
       return;
     }
 
@@ -292,9 +169,9 @@ class MempoolBlocks {
     const addedAndChanged: MempoolTransactionExtended[] = useAccelerations ? accelerationDelta.map(txid => newMempool[txid]).filter(tx => tx != null).concat(added) : added;
 
     for (const tx of addedAndChanged) {
-      this.setUid(tx, true);
+      this.setUid(tx, false);
     }
-    const removedUids = removed.map(tx => this.getUid(tx)).filter(uid => uid != null) as number[];
+    const removedTxs = removed.filter(tx => tx.uid != null) as MempoolTransactionExtended[];
 
     // prepare a stripped down version of the mempool with only the minimum necessary data
     // to reduce the overhead of passing this data to the worker thread
@@ -320,15 +197,15 @@ class MempoolBlocks {
         });
         this.txSelectionWorker?.once('error', reject);
       });
-      this.txSelectionWorker.postMessage({ type: 'update', added: addedStripped, removed: removedUids });
+      this.txSelectionWorker.postMessage({ type: 'update', added: addedStripped, removed: removedTxs.map(tx => tx.uid) as number[] });
       const { blocks, rates, clusters } = this.convertResultTxids(await workerResultPromise);
 
-      this.removeUids(removedUids);
+      this.removeUids(removedTxs);
 
       // clean up thread error listener
       this.txSelectionWorker?.removeListener('error', threadErrorListener);
 
-      this.processBlockTemplates(newMempool, blocks, null, Object.entries(rates), Object.values(clusters), accelerations, null, saveResults);
+      this.processBlockTemplates(newMempool, blocks, null, Object.entries(rates), Object.values(clusters), candidates, accelerations, null, saveResults);
       logger.debug(`updateBlockTemplates completed in ${(Date.now() - start) / 1000} seconds`);
     } catch (e) {
       logger.err('updateBlockTemplates failed. ' + (e instanceof Error ? e.message : e));
@@ -340,25 +217,28 @@ class MempoolBlocks {
     this.rustGbtGenerator = new GbtGenerator();
   }
 
-  public async $rustMakeBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, saveResults: boolean = false, useAccelerations: boolean = false, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
+  public async $rustMakeBlockTemplates(txids: string[], newMempool: { [txid: string]: MempoolTransactionExtended }, candidates: GbtCandidates | undefined, saveResults: boolean = false, useAccelerations: boolean = false, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
     const start = Date.now();
 
     // reset mempool short ids
     if (saveResults) {
       this.resetUids();
     }
+
+    const transactions = txids.map(txid => newMempool[txid]).filter(tx => tx != null);
     // set missing short ids
-    for (const tx of Object.values(newMempool)) {
+    for (const tx of transactions) {
       this.setUid(tx, !saveResults);
     }
     // set short ids for transaction inputs
-    for (const tx of Object.values(newMempool)) {
+    for (const tx of transactions) {
       tx.inputs = tx.vin.map(v => this.getUid(newMempool[v.txid])).filter(uid => (uid !== null && uid !== undefined)) as number[];
     }
 
     const accelerations = useAccelerations ? mempool.getAccelerations() : {};
     const acceleratedList = accelerationPool ? Object.values(accelerations).filter(acc => newMempool[acc.txid] && acc.pools.includes(accelerationPool)) : Object.values(accelerations).filter(acc => newMempool[acc.txid]);
     const convertedAccelerations = acceleratedList.map(acc => {
+      this.setUid(newMempool[acc.txid], true);
       return {
         uid: this.getUid(newMempool[acc.txid]),
         delta: acc.feeDelta,
@@ -368,13 +248,16 @@ class MempoolBlocks {
     // run the block construction algorithm in a separate thread, and wait for a result
     const rustGbt = saveResults ? this.rustGbtGenerator : new GbtGenerator();
     try {
-      const { blocks, blockWeights, rates, clusters } = this.convertNapiResultTxids(
-        await rustGbt.make(Object.values(newMempool) as RustThreadTransaction[], convertedAccelerations as RustThreadAcceleration[], this.nextUid),
+      const { blocks, blockWeights, rates, clusters, overflow } = this.convertNapiResultTxids(
+        await rustGbt.make(transactions as RustThreadTransaction[], convertedAccelerations as RustThreadAcceleration[], this.nextUid),
       );
       if (saveResults) {
         this.rustInitialized = true;
       }
-      const processed = this.processBlockTemplates(newMempool, blocks, blockWeights, rates, clusters, accelerations, accelerationPool, saveResults);
+      const expectedSize = transactions.length;
+      const resultMempoolSize = blocks.reduce((total, block) => total + block.length, 0) + overflow.length;
+      logger.debug(`RUST updateBlockTemplates returned ${resultMempoolSize} txs out of ${expectedSize} in the mempool, ${overflow.length} were unmineable`);
+      const processed = this.processBlockTemplates(newMempool, blocks, blockWeights, rates, clusters, candidates, accelerations, accelerationPool, saveResults);
       logger.debug(`RUST makeBlockTemplates completed in ${(Date.now() - start)/1000} seconds`);
       return processed;
     } catch (e) {
@@ -386,36 +269,37 @@ class MempoolBlocks {
     return this.mempoolBlocks;
   }
 
-  public async $oneOffRustBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, useAccelerations: boolean, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
-    return this.$rustMakeBlockTemplates(newMempool, false, useAccelerations, accelerationPool);
+  public async $oneOffRustBlockTemplates(transactions: string[], newMempool: { [txid: string]: MempoolTransactionExtended }, candidates: GbtCandidates | undefined, useAccelerations: boolean, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
+    return this.$rustMakeBlockTemplates(transactions, newMempool, candidates, false, useAccelerations, accelerationPool);
   }
 
-  public async $rustUpdateBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, mempoolSize: number, added: MempoolTransactionExtended[], removed: MempoolTransactionExtended[], useAccelerations: boolean, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
+  public async $rustUpdateBlockTemplates(transactions: string[], newMempool: { [txid: string]: MempoolTransactionExtended }, added: MempoolTransactionExtended[], removed: MempoolTransactionExtended[], candidates: GbtCandidates | undefined, useAccelerations: boolean, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
     // GBT optimization requires that uids never get too sparse
     // as a sanity check, we should also explicitly prevent uint32 uid overflow
-    if (this.nextUid + added.length >= Math.min(Math.max(262144, 2 * mempoolSize), MAX_UINT32)) {
+    if (this.nextUid + added.length >= Math.min(Math.max(262144, 2 * transactions.length), MAX_UINT32)) {
       this.resetRustGbt();
     }
 
     if (!this.rustInitialized) {
       // need to reset the worker
-      return this.$rustMakeBlockTemplates(newMempool, true, useAccelerations, accelerationPool);
+      return this.$rustMakeBlockTemplates(transactions, newMempool, candidates, true, useAccelerations, accelerationPool);
     }
 
     const start = Date.now();
     // set missing short ids
     for (const tx of added) {
-      this.setUid(tx, true);
+      this.setUid(tx, false);
     }
     // set short ids for transaction inputs
     for (const tx of added) {
       tx.inputs = tx.vin.map(v => this.getUid(newMempool[v.txid])).filter(uid => (uid !== null && uid !== undefined)) as number[];
     }
-    const removedUids = removed.map(tx => this.getUid(tx)).filter(uid => (uid !== null && uid !== undefined)) as number[];
+    const removedTxs = removed.filter(tx => tx.uid != null) as MempoolTransactionExtended[];
 
     const accelerations = useAccelerations ? mempool.getAccelerations() : {};
     const acceleratedList = accelerationPool ? Object.values(accelerations).filter(acc => newMempool[acc.txid] && acc.pools.includes(accelerationPool)) : Object.values(accelerations).filter(acc => newMempool[acc.txid]);
     const convertedAccelerations = acceleratedList.map(acc => {
+      this.setUid(newMempool[acc.txid], true);
       return {
         uid: this.getUid(newMempool[acc.txid]),
         delta: acc.feeDelta,
@@ -424,20 +308,21 @@ class MempoolBlocks {
 
     // run the block construction algorithm in a separate thread, and wait for a result
     try {
-      const { blocks, blockWeights, rates, clusters } = this.convertNapiResultTxids(
+      const { blocks, blockWeights, rates, clusters, overflow } = this.convertNapiResultTxids(
         await this.rustGbtGenerator.update(
           added as RustThreadTransaction[],
-          removedUids,
+          removedTxs.map(tx => tx.uid) as number[],
           convertedAccelerations as RustThreadAcceleration[],
           this.nextUid,
         ),
       );
-      const resultMempoolSize = blocks.reduce((total, block) => total + block.length, 0);
-      if (mempoolSize !== resultMempoolSize) {
-        throw new Error('GBT returned wrong number of transactions, cache is probably out of sync');
+      const resultMempoolSize = blocks.reduce((total, block) => total + block.length, 0) + overflow.length;
+      logger.debug(`RUST updateBlockTemplates returned ${resultMempoolSize} txs out of ${transactions.length} candidates, ${overflow.length} were unmineable`);
+      if (transactions.length !== resultMempoolSize) {
+        throw new Error(`GBT returned wrong number of transactions ${transactions.length} vs ${resultMempoolSize}, cache is probably out of sync`);
       } else {
-        const processed = this.processBlockTemplates(newMempool, blocks, blockWeights, rates, clusters, accelerations, accelerationPool, true);
-        this.removeUids(removedUids);
+        const processed = this.processBlockTemplates(newMempool, blocks, blockWeights, rates, clusters, candidates, accelerations, accelerationPool, true);
+        this.removeUids(removedTxs);
         logger.debug(`RUST updateBlockTemplates completed in ${(Date.now() - start)/1000} seconds`);
         return processed;
       }
@@ -448,7 +333,12 @@ class MempoolBlocks {
     }
   }
 
-  private processBlockTemplates(mempool: { [txid: string]: MempoolTransactionExtended }, blocks: string[][], blockWeights: number[] | null, rates: [string, number][], clusters: string[][], accelerations, accelerationPool, saveResults): MempoolBlockWithTransactions[] {
+  private processBlockTemplates(mempool: { [txid: string]: MempoolTransactionExtended }, blocks: string[][], blockWeights: number[] | null, rates: [string, number][], clusters: string[][], candidates: GbtCandidates | undefined, accelerations, accelerationPool, saveResults): MempoolBlockWithTransactions[] {
+    for (const txid of Object.keys(candidates?.txs ?? mempool)) {
+      if (txid in mempool) {
+        mempool[txid].cpfpDirty = false;
+      }
+    }
     for (const [txid, rate] of rates) {
       if (txid in mempool) {
         mempool[txid].cpfpDirty = (rate !== mempool[txid].effectiveFeePerVsize);
@@ -482,6 +372,9 @@ class MempoolBlocks {
             if (txid === memberTxid) {
               matched = true;
             } else {
+              if (!mempool[txid]) {
+                console.log('txid missing from mempool! ', txid, candidates?.txs[txid]);
+              }
               const relative = {
                 txid: txid,
                 fee: mempool[txid].fee,
@@ -514,6 +407,16 @@ class MempoolBlocks {
       let totalWeight = 0;
       let totalFees = 0;
       const transactions: MempoolTransactionExtended[] = [];
+
+      // backfill purged transactions
+      if (candidates?.txs && blockIndex === blocks.length - 1) {
+        for (const txid of Object.keys(mempool)) {
+          if (!candidates.txs[txid]) {
+            block.push(txid);
+          }
+        }
+      }
+
       for (const txid of block) {
         if (txid) {
           mempoolTx = mempool[txid];
@@ -522,16 +425,6 @@ class MempoolBlocks {
             block: blockIndex,
             vsize: totalVsize + (mempoolTx.vsize / 2),
           };
-          if (!mempoolTx.cpfpChecked) {
-            if (mempoolTx.ancestors?.length) {
-              mempoolTx.ancestors = [];
-            }
-            if (mempoolTx.descendants?.length) {
-              mempoolTx.descendants = [];
-            }
-            mempoolTx.bestDescendant = null;
-            mempoolTx.cpfpChecked = true;
-          }
 
           const acceleration = accelerations[txid];
           if (isAccelerated[txid] || (acceleration && (!accelerationPool || acceleration.pools.includes(accelerationPool)))) {
@@ -582,6 +475,7 @@ class MempoolBlocks {
       const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, mempoolBlocks);
       this.mempoolBlocks = mempoolBlocks;
       this.mempoolBlockDeltas = deltas;
+
     }
 
     return mempoolBlocks;
@@ -589,7 +483,7 @@ class MempoolBlocks {
 
   private dataToMempoolBlocks(transactionIds: string[], transactions: MempoolTransactionExtended[], totalSize: number, totalWeight: number, totalFees: number, feeStats?: EffectiveFeeStats ): MempoolBlockWithTransactions {
     if (!feeStats) {
-      feeStats = Common.calcEffectiveFeeStatistics(transactions.filter(tx => !tx.acceleration));
+      feeStats = Common.calcEffectiveFeeStatistics(transactions);
     }
     return {
       blockSize: totalSize,
@@ -599,36 +493,44 @@ class MempoolBlocks {
       medianFee: feeStats.medianFee, // Common.percentile(transactions.map((tx) => tx.effectiveFeePerVsize), config.MEMPOOL.RECOMMENDED_FEE_PERCENTILE),
       feeRange: feeStats.feeRange, //Common.getFeesInRange(transactions, rangeLength),
       transactionIds: transactionIds,
-      transactions: transactions.map((tx) => Common.stripTransaction(tx)),
+      transactions: transactions.map((tx) => Common.classifyTransaction(tx)),
     };
   }
 
   private resetUids(): void {
     this.uidMap.clear();
+    this.txidMap.clear();
     this.nextUid = 1;
   }
 
   private setUid(tx: MempoolTransactionExtended, skipSet = false): number {
-    if (tx.uid === null || tx.uid === undefined || !skipSet) {
+    if (!this.txidMap.has(tx.txid) || !skipSet) {
       const uid = this.nextUid;
       this.nextUid++;
       this.uidMap.set(uid, tx.txid);
+      this.txidMap.set(tx.txid, uid);
       tx.uid = uid;
       return uid;
     } else {
+      tx.uid = this.txidMap.get(tx.txid) as number;
       return tx.uid;
     }
   }
 
   private getUid(tx: MempoolTransactionExtended): number | void {
-    if (tx?.uid !== null && tx?.uid !== undefined && this.uidMap.has(tx.uid)) {
-      return tx.uid;
+    if (tx) {
+      return this.txidMap.get(tx.txid);
     }
   }
 
-  private removeUids(uids: number[]): void {
-    for (const uid of uids) {
-      this.uidMap.delete(uid);
+  private removeUids(txs: MempoolTransactionExtended[]): void {
+    for (const tx of txs) {
+      const uid = this.txidMap.get(tx.txid);
+      if (uid != null) {
+        this.uidMap.delete(uid);
+        this.txidMap.delete(tx.txid);
+      }
+      tx.uid = undefined;
     }
   }
 
@@ -657,8 +559,8 @@ class MempoolBlocks {
     return { blocks: convertedBlocks, rates: convertedRates, clusters: convertedClusters } as { blocks: string[][], rates: { [root: string]: number }, clusters: { [root: string]: string[] }};
   }
 
-  private convertNapiResultTxids({ blocks, blockWeights, rates, clusters }: GbtResult)
-    : { blocks: string[][], blockWeights: number[], rates: [string, number][], clusters: string[][] } {
+  private convertNapiResultTxids({ blocks, blockWeights, rates, clusters, overflow }: GbtResult)
+    : { blocks: string[][], blockWeights: number[], rates: [string, number][], clusters: string[][], overflow: string[] } {
     const convertedBlocks: string[][] = blocks.map(block => block.map(uid => {
       const txid = this.uidMap.get(uid);
       if (txid !== undefined) {
@@ -676,7 +578,49 @@ class MempoolBlocks {
     for (const cluster of clusters) {
       convertedClusters.push(cluster.map(uid => this.uidMap.get(uid)) as string[]);
     }
-    return { blocks: convertedBlocks, blockWeights, rates: convertedRates, clusters: convertedClusters };
+    const convertedOverflow: string[] = overflow.map(uid => {
+      const txid = this.uidMap.get(uid);
+      if (txid !== undefined) {
+        return txid;
+      } else {
+        throw new Error('GBT returned an unmineable transaction with unknown uid');
+      }
+    });
+    return { blocks: convertedBlocks, blockWeights, rates: convertedRates, clusters: convertedClusters, overflow: convertedOverflow };
+  }
+
+  public compressTx(tx: TransactionClassified): TransactionCompressed {
+    if (tx.acc) {
+      return [
+        tx.txid,
+        tx.fee,
+        tx.vsize,
+        tx.value,
+        Math.round((tx.rate || (tx.fee / tx.vsize)) * 100) / 100,
+        tx.flags,
+        tx.time || 0,
+        1,
+      ];
+    } else {
+      return [
+        tx.txid,
+        tx.fee,
+        tx.vsize,
+        tx.value,
+        Math.round((tx.rate || (tx.fee / tx.vsize)) * 100) / 100,
+        tx.flags,
+        tx.time || 0,
+      ];
+    }
+  }
+
+  public compressDeltaChange(tx: TransactionClassified): MempoolDeltaChange {
+    return [
+      tx.txid,
+      Math.round((tx.rate || (tx.fee / tx.vsize)) * 100) / 100,
+      tx.flags,
+      tx.acc ? 1 : 0,
+    ];
   }
 }
 

backend/src/api/mempool.ts

@@ -1,6 +1,6 @@
 import config from '../config';
 import bitcoinApi from './bitcoin/bitcoin-api-factory';
-import { MempoolTransactionExtended, TransactionExtended, VbytesPerSecond } from '../mempool.interfaces';
+import { MempoolTransactionExtended, TransactionExtended, VbytesPerSecond, GbtCandidates } from '../mempool.interfaces';
 import logger from '../logger';
 import { Common } from './common';
 import transactionUtils from './transaction-utils';
@@ -9,20 +9,22 @@ import loadingIndicators from './loading-indicators';
 import bitcoinClient from './bitcoin/bitcoin-client';
 import bitcoinSecondClient from './bitcoin/bitcoin-second-client';
 import rbfCache from './rbf-cache';
-import accelerationApi, { Acceleration } from './services/acceleration';
+import { Acceleration } from './services/acceleration';
 import redisCache from './redis-cache';
+import blocks from './blocks';
 
 class Mempool {
   private inSync: boolean = false;
   private mempoolCacheDelta: number = -1;
   private mempoolCache: { [txId: string]: MempoolTransactionExtended } = {};
+  private mempoolCandidates: { [txid: string ]: boolean } = {};
   private spendMap = new Map<string, MempoolTransactionExtended>();
   private mempoolInfo: IBitcoinApi.MempoolInfo = { loaded: false, size: 0, bytes: 0, usage: 0, total_fee: 0,
-                                                    maxmempool: 300000000, mempoolminfee: 0.00001000, minrelaytxfee: 0.00001000 };
+                                                    maxmempool: 300000000, mempoolminfee: Common.isLiquid() ? 0.00000100 : 0.00001000, minrelaytxfee: Common.isLiquid() ? 0.00000100 : 0.00001000 };
   private mempoolChangedCallback: ((newMempool: {[txId: string]: MempoolTransactionExtended; }, newTransactions: MempoolTransactionExtended[],
     deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[]) => void) | undefined;
   private $asyncMempoolChangedCallback: ((newMempool: {[txId: string]: MempoolTransactionExtended; }, mempoolSize: number, newTransactions: MempoolTransactionExtended[],
-    deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[]) => Promise<void>) | undefined;
+    deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[], candidates?: GbtCandidates) => Promise<void>) | undefined;
 
   private accelerations: { [txId: string]: Acceleration } = {};
 
@@ -40,6 +42,8 @@ class Mempool {
   private missingTxCount = 0;
   private mainLoopTimeout: number = 120000;
 
+  public limitGBT = config.MEMPOOL.USE_SECOND_NODE_FOR_MINFEE && config.MEMPOOL.LIMIT_GBT;
+
   constructor() {
     setInterval(this.updateTxPerSecond.bind(this), 1000);
   }
@@ -74,7 +78,8 @@ class Mempool {
   }
 
   public setAsyncMempoolChangedCallback(fn: (newMempool: { [txId: string]: MempoolTransactionExtended; }, mempoolSize: number,
-    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[]) => Promise<void>): void {
+    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[],
+    candidates?: GbtCandidates) => Promise<void>): void {
     this.$asyncMempoolChangedCallback = fn;
   }
 
@@ -86,6 +91,10 @@ class Mempool {
     return this.spendMap;
   }
 
+  public getFromSpendMap(txid, index): MempoolTransactionExtended | void {
+    return this.spendMap.get(`${txid}:${index}`);
+  }
+
   public async $setMempool(mempoolData: { [txId: string]: MempoolTransactionExtended }) {
     this.mempoolCache = mempoolData;
     let count = 0;
@@ -94,16 +103,23 @@ class Mempool {
       logger.debug(`Migrating ${Object.keys(this.mempoolCache).length} transactions from disk cache to Redis cache`);
     }
     for (const txid of Object.keys(this.mempoolCache)) {
-      if (!this.mempoolCache[txid].sigops || this.mempoolCache[txid].effectiveFeePerVsize == null) {
+      if (!this.mempoolCache[txid].adjustedVsize || this.mempoolCache[txid].sigops == null || this.mempoolCache[txid].effectiveFeePerVsize == null) {
         this.mempoolCache[txid] = transactionUtils.extendMempoolTransaction(this.mempoolCache[txid]);
       }
       if (this.mempoolCache[txid].order == null) {
         this.mempoolCache[txid].order = transactionUtils.txidToOrdering(txid);
       }
+      for (const vin of this.mempoolCache[txid].vin) {
+        transactionUtils.addInnerScriptsToVin(vin);
+      }
       count++;
       if (config.MEMPOOL.CACHE_ENABLED && config.REDIS.ENABLED) {
         await redisCache.$addTransaction(this.mempoolCache[txid]);
       }
+      this.mempoolCache[txid].flags = Common.getTransactionFlags(this.mempoolCache[txid]);
+      this.mempoolCache[txid].cpfpChecked = false;
+      this.mempoolCache[txid].cpfpDirty = true;
+      this.mempoolCache[txid].cpfpUpdated = undefined;
     }
     if (config.MEMPOOL.CACHE_ENABLED && config.REDIS.ENABLED) {
       await redisCache.$flushTransactions();
@@ -113,7 +129,7 @@ class Mempool {
       this.mempoolChangedCallback(this.mempoolCache, [], [], []);
     }
     if (this.$asyncMempoolChangedCallback) {
-      await this.$asyncMempoolChangedCallback(this.mempoolCache, count, [], [], []);
+      await this.$asyncMempoolChangedCallback(this.mempoolCache, count, [], [], [], this.limitGBT ? { txs: {}, added: [], removed: [] } : undefined);
     }
     this.addToSpendMap(Object.values(this.mempoolCache));
   }
@@ -126,7 +142,7 @@ class Mempool {
     loadingIndicators.setProgress('mempool', count / expectedCount * 100);
     while (!done) {
       try {
-        const result = await bitcoinApi.$getAllMempoolTransactions(last_txid);
+        const result = await bitcoinApi.$getAllMempoolTransactions(last_txid, config.ESPLORA.BATCH_QUERY_BASE_SIZE);
         if (result) {
           for (const tx of result) {
             const extendedTransaction = transactionUtils.extendMempoolTransaction(tx);
@@ -156,6 +172,10 @@ class Mempool {
     return newTransactions;
   }
 
+  public getMempoolCandidates(): { [txid: string]: boolean } {
+    return this.mempoolCandidates;
+  }
+
   public async $updateMemPoolInfo() {
     this.mempoolInfo = await this.$getMempoolInfo();
   }
@@ -185,7 +205,7 @@ class Mempool {
     return txTimes;
   }
 
-  public async $updateMempool(transactions: string[], pollRate: number): Promise<void> {
+  public async $updateMempool(transactions: string[], accelerations: Acceleration[] | null, minFeeMempool: string[], minFeeTip: number, pollRate: number): Promise<void> {
     logger.debug(`Updating mempool...`);
 
     // warn if this run stalls the main loop for more than 2 minutes
@@ -235,7 +255,7 @@ class Mempool {
 
     if (!loaded) {
       const remainingTxids = transactions.filter(txid => !this.mempoolCache[txid]);
-      const sliceLength = 10000;
+      const sliceLength = config.ESPLORA.BATCH_QUERY_BASE_SIZE;
       for (let i = 0; i < Math.ceil(remainingTxids.length / sliceLength); i++) {
         const slice = remainingTxids.slice(i * sliceLength, (i + 1) * sliceLength);
         const txs = await transactionUtils.$getMempoolTransactionsExtended(slice, false, false, false);
@@ -326,23 +346,27 @@ class Mempool {
       }
     }
 
+    const candidates = await this.getNextCandidates(minFeeMempool, minFeeTip, deletedTransactions);
+
     const newMempoolSize = currentMempoolSize + newTransactions.length - deletedTransactions.length;
     const newTransactionsStripped = newTransactions.map((tx) => Common.stripTransaction(tx));
     this.latestTransactions = newTransactionsStripped.concat(this.latestTransactions).slice(0, 6);
 
-    const accelerationDelta = await this.$updateAccelerations();
+    const accelerationDelta = accelerations != null ? await this.$updateAccelerations(accelerations) : [];
     if (accelerationDelta.length) {
       hasChange = true;
     }
 
     this.mempoolCacheDelta = Math.abs(transactions.length - newMempoolSize);
 
+    const candidatesChanged = candidates?.added?.length || candidates?.removed?.length;
+
     if (this.mempoolChangedCallback && (hasChange || deletedTransactions.length)) {
       this.mempoolChangedCallback(this.mempoolCache, newTransactions, deletedTransactions, accelerationDelta);
     }
-    if (this.$asyncMempoolChangedCallback && (hasChange || deletedTransactions.length)) {
+    if (this.$asyncMempoolChangedCallback && (hasChange || deletedTransactions.length || candidatesChanged)) {
       this.updateTimerProgress(timer, 'running async mempool callback');
-      await this.$asyncMempoolChangedCallback(this.mempoolCache, newMempoolSize, newTransactions, deletedTransactions, accelerationDelta);
+      await this.$asyncMempoolChangedCallback(this.mempoolCache, newMempoolSize, newTransactions, deletedTransactions, accelerationDelta, candidates);
       this.updateTimerProgress(timer, 'completed async mempool callback');
     }
 
@@ -370,14 +394,12 @@ class Mempool {
     return this.accelerations;
   }
 
-  public async $updateAccelerations(): Promise<string[]> {
+  public $updateAccelerations(newAccelerations: Acceleration[]): string[] {
     if (!config.MEMPOOL_SERVICES.ACCELERATIONS) {
       return [];
     }
 
     try {
-      const newAccelerations = await accelerationApi.$fetchAccelerations();
-
       const changed: string[] = [];
 
       const newAccelerationMap: { [txid: string]: Acceleration } = {};
@@ -430,6 +452,64 @@ class Mempool {
     }
   }
 
+  public async getNextCandidates(minFeeTransactions: string[], blockHeight: number, deletedTransactions: MempoolTransactionExtended[]): Promise<GbtCandidates | undefined> {
+    if (this.limitGBT) {
+      const deletedTxsMap = {};
+      for (const tx of deletedTransactions) {
+        deletedTxsMap[tx.txid] = tx;
+      }
+      const newCandidateTxMap = {};
+      for (const txid of minFeeTransactions) {
+        if (this.mempoolCache[txid]) {
+          newCandidateTxMap[txid] = true;
+        }
+      }
+      const accelerations = this.getAccelerations();
+      for (const txid of Object.keys(accelerations)) {
+        if (this.mempoolCache[txid]) {
+          newCandidateTxMap[txid] = true;
+        }
+      }
+      const removed: MempoolTransactionExtended[] = [];
+      const added: MempoolTransactionExtended[] = [];
+      // don't prematurely remove txs included in a new block
+      if (blockHeight > blocks.getCurrentBlockHeight()) {
+        for (const txid of Object.keys(this.mempoolCandidates)) {
+          newCandidateTxMap[txid] = true;
+        }
+      } else {
+        for (const txid of Object.keys(this.mempoolCandidates)) {
+          if (!newCandidateTxMap[txid]) {
+            if (this.mempoolCache[txid]) {
+              removed.push(this.mempoolCache[txid]);
+              this.mempoolCache[txid].effectiveFeePerVsize = this.mempoolCache[txid].adjustedFeePerVsize;
+              this.mempoolCache[txid].ancestors = [];
+              this.mempoolCache[txid].descendants = [];
+              this.mempoolCache[txid].bestDescendant = null;
+              this.mempoolCache[txid].cpfpChecked = false;
+              this.mempoolCache[txid].cpfpUpdated = undefined;
+            } else if (deletedTxsMap[txid]) {
+              removed.push(deletedTxsMap[txid]);
+            }
+          }
+        }
+      }
+
+      for (const txid of Object.keys(newCandidateTxMap)) {
+        if (!this.mempoolCandidates[txid]) {
+          added.push(this.mempoolCache[txid]);
+        }
+      }
+
+      this.mempoolCandidates = newCandidateTxMap;
+      return {
+        txs: this.mempoolCandidates,
+        added,
+        removed
+      };
+    }
+  }
+
   private startTimer() {
     const state: any = {
       start: Date.now(),

backend/src/api/mining/mining-routes.ts

@@ -8,6 +8,7 @@ import HashratesRepository from '../../repositories/HashratesRepository';
 import bitcoinClient from '../bitcoin/bitcoin-client';
 import mining from "./mining";
 import PricesRepository from '../../repositories/PricesRepository';
+import AccelerationRepository from '../../repositories/AccelerationRepository';
 
 class MiningRoutes {
   public initRoutes(app: Application) {
@@ -34,6 +35,11 @@ class MiningRoutes {
       .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/audit/:hash', this.$getBlockAudit)
       .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/timestamp/:timestamp', this.$getHeightFromTimestamp)
       .get(config.MEMPOOL.API_URL_PREFIX + 'historical-price', this.$getHistoricalPrice)
+
+      .get(config.MEMPOOL.API_URL_PREFIX + 'accelerations/pool/:slug', this.$getAccelerationsByPool)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'accelerations/block/:height', this.$getAccelerationsByHeight)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'accelerations/recent/:interval', this.$getRecentAccelerations)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'accelerations/total', this.$getAccelerationTotals)
     ;
   }
 
@@ -46,13 +52,20 @@ class MiningRoutes {
         res.status(400).send('Prices are not available on testnets.');
         return;
       }
-      if (req.query.timestamp) {
-        res.status(200).send(await PricesRepository.$getNearestHistoricalPrice(
-          parseInt(<string>req.query.timestamp ?? 0, 10)
-        ));
+      const timestamp = parseInt(req.query.timestamp as string, 10) || 0;
+      const currency = req.query.currency as string;
+      
+      let response;
+      if (timestamp && currency) {
+        response = await PricesRepository.$getNearestHistoricalPrice(timestamp, currency);
+      } else if (timestamp) {
+        response = await PricesRepository.$getNearestHistoricalPrice(timestamp);
+      } else if (currency) {
+        response = await PricesRepository.$getHistoricalPrices(currency);
       } else {
-        res.status(200).send(await PricesRepository.$getHistoricalPrices());
+        response = await PricesRepository.$getHistoricalPrices();
       }
+      res.status(200).send(response);
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
@@ -352,6 +365,67 @@ class MiningRoutes {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
   }
+
+  private async $getAccelerationsByPool(req: Request, res: Response): Promise<void> {
+    try {
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      if (!config.MEMPOOL_SERVICES.ACCELERATIONS || ['testnet', 'signet', 'liquidtestnet', 'liquid'].includes(config.MEMPOOL.NETWORK)) {
+        res.status(400).send('Acceleration data is not available.');
+        return;
+      }
+      res.status(200).send(await AccelerationRepository.$getAccelerationInfo(req.params.slug));
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getAccelerationsByHeight(req: Request, res: Response): Promise<void> {
+    try {
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24).toUTCString());
+      if (!config.MEMPOOL_SERVICES.ACCELERATIONS || ['testnet', 'signet', 'liquidtestnet', 'liquid'].includes(config.MEMPOOL.NETWORK)) {
+        res.status(400).send('Acceleration data is not available.');
+        return;
+      }
+      const height = req.params.height === undefined ? undefined : parseInt(req.params.height, 10);
+      res.status(200).send(await AccelerationRepository.$getAccelerationInfo(null, height));
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getRecentAccelerations(req: Request, res: Response): Promise<void> {
+    try {
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      if (!config.MEMPOOL_SERVICES.ACCELERATIONS || ['testnet', 'signet', 'liquidtestnet', 'liquid'].includes(config.MEMPOOL.NETWORK)) {
+        res.status(400).send('Acceleration data is not available.');
+        return;
+      }
+      res.status(200).send(await AccelerationRepository.$getAccelerationInfo(null, null, req.params.interval));
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getAccelerationTotals(req: Request, res: Response): Promise<void> {
+    try {
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      if (!config.MEMPOOL_SERVICES.ACCELERATIONS || ['testnet', 'signet', 'liquidtestnet', 'liquid'].includes(config.MEMPOOL.NETWORK)) {
+        res.status(400).send('Acceleration data is not available.');
+        return;
+      }
+      res.status(200).send(await AccelerationRepository.$getAccelerationTotals(<string>req.query.pool, <string>req.query.interval));
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
 }
 
 export default new MiningRoutes();

backend/src/api/mining/mining.ts

@@ -15,6 +15,13 @@ import bitcoinApi from '../bitcoin/bitcoin-api-factory';
 import { IEsploraApi } from '../bitcoin/esplora-api.interface';
 import database from '../../database';
 
+interface DifficultyBlock {
+  timestamp: number,
+  height: number,
+  bits: number,
+  difficulty: number,
+}
+
 class Mining {
   private blocksPriceIndexingRunning = false;
   public lastHashrateIndexingDate: number | null = null;
@@ -135,7 +142,7 @@ class Mining {
   public async $getPoolStat(slug: string): Promise<object> {
     const pool = await PoolsRepository.$getPool(slug);
     if (!pool) {
-      throw new Error('This mining pool does not exist ' + escape(slug));
+      throw new Error('This mining pool does not exist');
     }
 
     const blockCount: number = await BlocksRepository.$blockCount(pool.id);
@@ -421,6 +428,7 @@ class Mining {
       indexedHeights[height] = true;
     }
 
+    // gets {time, height, difficulty, bits} of blocks in ascending order of height
     const blocks: any = await BlocksRepository.$getBlocksDifficulty();
     const genesisBlock: IEsploraApi.Block = await bitcoinApi.$getBlock(await bitcoinApi.$getBlockHash(0));
     let currentDifficulty = genesisBlock.difficulty;
@@ -436,41 +444,45 @@ class Mining {
       });
     }
 
-    const oldestConsecutiveBlock = await BlocksRepository.$getOldestConsecutiveBlock();
-    if (config.MEMPOOL.INDEXING_BLOCKS_AMOUNT !== -1) {
-      currentBits = oldestConsecutiveBlock.bits;
-      currentDifficulty = oldestConsecutiveBlock.difficulty;
+    if (!blocks?.length) {
+      // no blocks in database yet
+      return;
     }
 
+    const oldestConsecutiveBlock = this.getOldestConsecutiveBlock(blocks);
+
+    currentBits = oldestConsecutiveBlock.bits;
+    currentDifficulty = oldestConsecutiveBlock.difficulty;
+
     let totalBlockChecked = 0;
     let timer = new Date().getTime() / 1000;
 
     for (const block of blocks) {
+      // skip until the first block after the oldest consecutive block
+      if (block.height <= oldestConsecutiveBlock.height) {
+        continue;
+      }
+
+      // difficulty has changed between two consecutive blocks!
       if (block.bits !== currentBits) {
-        if (indexedHeights[block.height] === true) { // Already indexed
-          if (block.height >= oldestConsecutiveBlock.height) {
-            currentDifficulty = block.difficulty;
-            currentBits = block.bits;
-          }
-          continue;          
+        // skip if already indexed
+        if (indexedHeights[block.height] !== true) {
+          let adjustment = block.difficulty / currentDifficulty;
+          adjustment = Math.round(adjustment * 1000000) / 1000000; // Remove float point noise
+
+          await DifficultyAdjustmentsRepository.$saveAdjustments({
+            time: block.time,
+            height: block.height,
+            difficulty: block.difficulty,
+            adjustment: adjustment,
+          });
+
+          totalIndexed++;
         }
-
-        let adjustment = block.difficulty / currentDifficulty;
-        adjustment = Math.round(adjustment * 1000000) / 1000000; // Remove float point noise
-
-        await DifficultyAdjustmentsRepository.$saveAdjustments({
-          time: block.time,
-          height: block.height,
-          difficulty: block.difficulty,
-          adjustment: adjustment,
-        });
-
-        totalIndexed++;
-        if (block.height >= oldestConsecutiveBlock.height) {
-          currentDifficulty = block.difficulty;
-          currentBits = block.bits;
-        }
-    }
+        // update the current difficulty
+        currentDifficulty = block.difficulty;
+        currentBits = block.bits;
+      }
 
       totalBlockChecked++;
       const elapsedSeconds = Math.max(1, Math.round((new Date().getTime() / 1000) - timer));
@@ -633,6 +645,17 @@ class Mining {
       default: return 86400 * scale;
     }
   }
+
+  // Finds the oldest block in a consecutive chain back from the tip
+  // assumes `blocks` is sorted in ascending height order
+  private getOldestConsecutiveBlock(blocks: DifficultyBlock[]): DifficultyBlock {
+    for (let i = blocks.length - 1; i > 0; i--) {
+      if ((blocks[i].height - blocks[i - 1].height) > 1) {
+        return blocks[i];
+      }
+    }
+    return blocks[0];
+  }
 }
 
 export default new Mining();

backend/src/api/rbf-cache.ts

@@ -2,6 +2,7 @@ import config from "../config";
 import logger from "../logger";
 import { MempoolTransactionExtended, TransactionStripped } from "../mempool.interfaces";
 import bitcoinApi from './bitcoin/bitcoin-api-factory';
+import { IEsploraApi } from "./bitcoin/esplora-api.interface";
 import { Common } from "./common";
 import redisCache from "./redis-cache";
 
@@ -53,6 +54,9 @@ class RbfCache {
   private expiring: Map<string, number> = new Map();
   private cacheQueue: CacheEvent[] = [];
 
+  private evictionCount = 0;
+  private staleCount = 0;
+
   constructor() {
     setInterval(this.cleanup.bind(this), 1000 * 60 * 10);
   }
@@ -93,6 +97,8 @@ class RbfCache {
       return;
     }
 
+    newTxExtended.replacement = true;
+
     const newTx = Common.stripTransaction(newTxExtended) as RbfTransaction;
     const newTime = newTxExtended.firstSeen || (Date.now() / 1000);
     newTx.rbf = newTxExtended.vin.some((v) => v.sequence < 0xfffffffe);
@@ -245,6 +251,7 @@ class RbfCache {
 
   // flag a transaction as removed from the mempool
   public evict(txid: string, fast: boolean = false): void {
+    this.evictionCount++;
     if (this.txs.has(txid) && (fast || !this.expiring.has(txid))) {
       const expiryTime = fast ? Date.now() + (1000 * 60 * 10) : Date.now() + (1000 * 86400); // 24 hours
       this.addExpiration(txid, expiryTime);
@@ -272,18 +279,23 @@ class RbfCache {
         this.remove(txid);
       }
     }
-    logger.debug(`rbf cache contains ${this.txs.size} txs, ${this.rbfTrees.size} trees, ${this.expiring.size} due to expire`);
+    logger.debug(`rbf cache contains ${this.txs.size} txs, ${this.rbfTrees.size} trees, ${this.expiring.size} due to expire (${this.evictionCount} newly expired)`);
+    this.evictionCount = 0;
   }
 
   // remove a transaction & all previous versions from the cache
   private remove(txid): void {
     // don't remove a transaction if a newer version remains in the mempool
     if (!this.replacedBy.has(txid)) {
+      const root = this.treeMap.get(txid);
       const replaces = this.replaces.get(txid);
       this.replaces.delete(txid);
       this.treeMap.delete(txid);
       this.removeTx(txid);
       this.removeExpiration(txid);
+      if (root === txid) {
+        this.removeTree(txid);
+      }
       for (const tx of (replaces || [])) {
         // recursively remove prior versions from the cache
         this.replacedBy.delete(tx);
@@ -358,19 +370,28 @@ class RbfCache {
     };
   }
 
-  public async load({ txs, trees, expiring }): Promise<void> {
-    txs.forEach(txEntry => {
-      this.txs.set(txEntry.key, txEntry.value);
-    });
-    for (const deflatedTree of trees) {
-      await this.importTree(deflatedTree.root, deflatedTree.root, deflatedTree, this.txs);
-    }
-    expiring.forEach(expiringEntry => {
-      if (this.txs.has(expiringEntry.key)) {
-        this.expiring.set(expiringEntry.key, new Date(expiringEntry.value).getTime());
+  public async load({ txs, trees, expiring, mempool }): Promise<void> {
+    try {
+      txs.forEach(txEntry => {
+        this.txs.set(txEntry.value.txid, txEntry.value);
+      });
+      this.staleCount = 0;
+      for (const deflatedTree of trees) {
+        await this.importTree(mempool, deflatedTree.root, deflatedTree.root, deflatedTree, this.txs);
       }
-    });
-    this.cleanup();
+      expiring.forEach(expiringEntry => {
+        if (this.txs.has(expiringEntry.key)) {
+          this.expiring.set(expiringEntry.key, new Date(expiringEntry.value).getTime());
+        }
+      });
+      this.staleCount = 0;
+      await this.checkTrees();
+      logger.debug(`loaded ${txs.length} txs, ${trees.length} trees into rbf cache, ${expiring.length} due to expire, ${this.staleCount} were stale`);
+      this.cleanup();
+
+    } catch (e) {
+      logger.err('failed to restore RBF cache: ' + (e instanceof Error ? e.message : e));
+    }
   }
 
   exportTree(tree: RbfTree, deflated: any = null) {
@@ -394,40 +415,25 @@ class RbfCache {
     return deflated;
   }
 
-  async importTree(root, txid, deflated, txs: Map<string, MempoolTransactionExtended>, mined: boolean = false): Promise<RbfTree | void> {
+  async importTree(mempool, root, txid, deflated, txs: Map<string, MempoolTransactionExtended>, mined: boolean = false): Promise<RbfTree | void> {
     const treeInfo = deflated[txid];
     const replaces: RbfTree[] = [];
 
-    // check if any transactions in this tree have already been confirmed
-    mined = mined || treeInfo.mined;
-    let exists = mined;
-    if (!mined) {
-      try {
-        const apiTx = await bitcoinApi.$getRawTransaction(txid);
-        if (apiTx) {
-          exists = true;
-        }
-        if (apiTx?.status?.confirmed) {
-          mined = true;
-          treeInfo.txMined = true;
-          this.evict(txid, true);
-        }
-      } catch (e) {
-        // most transactions do not exist
-      }
-    }
-
-    // if the root tx is not in the mempool or the blockchain
-    // evict this tree as soon as possible
-    if (root === txid && !exists) {
-      this.evict(txid, true);
+    // if the root tx is unknown, remove this tree and return early
+    if (root === txid && !txs.has(txid)) {
+      this.staleCount++;
+      this.removeTree(deflated.key);
+      return;
     }
 
     // recursively reconstruct child trees
     for (const childId of treeInfo.replaces) {
-      const replaced = await this.importTree(root, childId, deflated, txs, mined);
+      const replaced = await this.importTree(mempool, root, childId, deflated, txs, mined);
       if (replaced) {
         this.replacedBy.set(replaced.tx.txid, txid);
+        if (mempool[replaced.tx.txid]) {
+          mempool[replaced.tx.txid].replacement = true;
+        }
         replaces.push(replaced);
         if (replaced.mined) {
           mined = true;
@@ -458,6 +464,60 @@ class RbfCache {
     return tree;
   }
 
+  private async checkTrees(): Promise<void> {
+    const found: { [txid: string]: boolean } = {};
+    const txids = Array.from(this.txs.values()).map(tx => tx.txid).filter(txid => {
+      return !this.expiring.has(txid) && !this.getRbfTree(txid)?.mined;
+    });
+
+    const processTxs = (txs: IEsploraApi.Transaction[]): void => {
+      for (const tx of txs) {
+        found[tx.txid] = true;
+        if (tx.status?.confirmed) {
+          const tree = this.getRbfTree(tx.txid);
+          if (tree) {
+            this.setTreeMined(tree, tx.txid);
+            tree.mined = true;
+            this.evict(tx.txid, false);
+          }
+        }
+      }
+    };
+
+    if (config.MEMPOOL.BACKEND === 'esplora') {
+      let processedCount = 0;
+      const sliceLength = Math.ceil(config.ESPLORA.BATCH_QUERY_BASE_SIZE / 40);
+      for (let i = 0; i < Math.ceil(txids.length / sliceLength); i++) {
+        const slice = txids.slice(i * sliceLength, (i + 1) * sliceLength);
+        processedCount += slice.length;
+        try {
+          const txs = await bitcoinApi.$getRawTransactions(slice);
+          processTxs(txs);
+          logger.debug(`fetched and processed ${processedCount} of ${txids.length} cached rbf transactions (${(processedCount / txids.length * 100).toFixed(2)}%)`);
+        } catch (err) {
+          logger.err(`failed to fetch or process ${slice.length} cached rbf transactions`);
+        }
+      }
+    } else {
+      const txs: IEsploraApi.Transaction[] = [];
+      for (const txid of txids) {
+        try {
+          const tx = await bitcoinApi.$getRawTransaction(txid, true, false);
+          txs.push(tx);
+        } catch (err) {
+          // some 404s are expected, so continue quietly
+        }
+      }
+      processTxs(txs);
+    }
+
+    for (const txid of txids) {
+      if (!found[txid]) {
+        this.evict(txid, false);
+      }
+    }
+  }
+
   public getLatestRbfSummary(): ReplacementInfo[] {
     const rbfList = this.getRbfTrees(false);
     return rbfList.slice(0, 6).map(rbfTree => {

backend/src/api/redis-cache.ts

@@ -19,45 +19,90 @@ class RedisCache {
   private client;
   private connected = false;
   private schemaVersion = 1;
+  private redisConfig: any;
 
+  private pauseFlush: boolean = false;
   private cacheQueue: MempoolTransactionExtended[] = [];
+  private removeQueue: string[] = [];
+  private rbfCacheQueue: { type: string, txid: string, value: any }[] = [];
+  private rbfRemoveQueue: { type: string, txid: string }[] = [];
   private txFlushLimit: number = 10000;
 
   constructor() {
     if (config.REDIS.ENABLED) {
-      const redisConfig = {
+      this.redisConfig = {
         socket: {
           path: config.REDIS.UNIX_SOCKET_PATH
         },
         database: NetworkDB[config.MEMPOOL.NETWORK],
       };
-      this.client = createClient(redisConfig);
-      this.client.on('error', (e) => {
-        logger.err(`Error in Redis client: ${e instanceof Error ? e.message : e}`);
-      });
       this.$ensureConnected();
+      setInterval(() => { this.$ensureConnected(); }, 10000);
     }
   }
 
-  private async $ensureConnected(): Promise<void> {
+  private async $ensureConnected(): Promise<boolean> {
     if (!this.connected && config.REDIS.ENABLED) {
-      return this.client.connect().then(async () => {
-        this.connected = true;
-        logger.info(`Redis client connected`);
-        const version = await this.client.get('schema_version');
-        if (version !== this.schemaVersion) {
-          // schema changed
-          // perform migrations or flush DB if necessary
-          logger.info(`Redis schema version changed from ${version} to ${this.schemaVersion}`);
-          await this.client.set('schema_version', this.schemaVersion);
-        }
-      });
+      try {
+        this.client = createClient(this.redisConfig);
+        this.client.on('error', async (e) => {
+          logger.err(`Error in Redis client: ${e instanceof Error ? e.message : e}`);
+          this.connected = false;
+          await this.client.disconnect();
+        });
+        await this.client.connect().then(async () => {
+          try {
+            const version = await this.client.get('schema_version');
+            this.connected = true;
+            if (version !== this.schemaVersion) {
+              // schema changed
+              // perform migrations or flush DB if necessary
+              logger.info(`Redis schema version changed from ${version} to ${this.schemaVersion}`);
+              await this.client.set('schema_version', this.schemaVersion);
+            }
+            logger.info(`Redis client connected`);
+            return true;
+          } catch (e) {
+            this.connected = false;
+            logger.warn('Failed to connect to Redis');
+            return false;
+          }
+        });
+        await this.$onConnected();
+        return true;
+      } catch (e) {
+        logger.warn('Error connecting to Redis: ' + (e instanceof Error ? e.message : e));
+        return false;
+      }
+    } else {
+      try {
+        // test connection
+        await this.client.get('schema_version');
+        return true;
+      } catch (e) {
+        logger.warn('Lost connection to Redis: ' + (e instanceof Error ? e.message : e));
+        logger.warn('Attempting to reconnect in 10 seconds');
+        this.connected = false;
+        return false;
+      }
     }
   }
 
-  async $updateBlocks(blocks: BlockExtended[]) {
+  private async $onConnected(): Promise<void> {
+    await this.$flushTransactions();
+    await this.$removeTransactions([]);
+    await this.$flushRbfQueues();
+  }
+
+  async $updateBlocks(blocks: BlockExtended[]): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
+    if (!this.connected) {
+      logger.warn(`Failed to update blocks in Redis cache: Redis is not connected`);
+      return;
+    }
     try {
-      await this.$ensureConnected();
       await this.client.set('blocks', JSON.stringify(blocks));
       logger.debug(`Saved latest blocks to Redis cache`);
     } catch (e) {
@@ -65,9 +110,15 @@ class RedisCache {
     }
   }
 
-  async $updateBlockSummaries(summaries: BlockSummary[]) {
+  async $updateBlockSummaries(summaries: BlockSummary[]): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
+    if (!this.connected) {
+      logger.warn(`Failed to update block summaries in Redis cache: Redis is not connected`);
+      return;
+    }
     try {
-      await this.$ensureConnected();
       await this.client.set('block-summaries', JSON.stringify(summaries));
       logger.debug(`Saved latest block summaries to Redis cache`);
     } catch (e) {
@@ -75,30 +126,35 @@ class RedisCache {
     }
   }
 
-  async $addTransaction(tx: MempoolTransactionExtended) {
+  async $addTransaction(tx: MempoolTransactionExtended): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
     this.cacheQueue.push(tx);
     if (this.cacheQueue.length >= this.txFlushLimit) {
-      await this.$flushTransactions();
+      if (!this.pauseFlush) {
+        await this.$flushTransactions();
+      }
     }
   }
 
-  async $flushTransactions() {
-    const success = await this.$addTransactions(this.cacheQueue);
-    if (success) {
-      logger.debug(`Saved ${this.cacheQueue.length} transactions to Redis cache`);
-      this.cacheQueue = [];
-    } else {
-      logger.err(`Failed to save ${this.cacheQueue.length} transactions to Redis cache`);
+  async $flushTransactions(): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
+    if (!this.cacheQueue.length) {
+      return;
+    }
+    if (!this.connected) {
+      logger.warn(`Failed to add ${this.cacheQueue.length} transactions to Redis cache: Redis not connected`);
+      return;
     }
-  }
 
-  private async $addTransactions(newTransactions: MempoolTransactionExtended[]): Promise<boolean> {
-    if (!newTransactions.length) {
-      return true;
-    }
+    this.pauseFlush = false;
+
+    const toAdd = this.cacheQueue.slice(0, this.txFlushLimit);
     try {
-      await this.$ensureConnected();
-      const msetData = newTransactions.map(tx => {
+      const msetData = toAdd.map(tx => {
         const minified: any = { ...tx };
         delete minified.hex;
         for (const vin of minified.vin) {
@@ -112,29 +168,53 @@ class RedisCache {
         return [`mempool:tx:${tx.txid}`, JSON.stringify(minified)];
       });
       await this.client.MSET(msetData);
-      return true;
+      // successful, remove transactions from cache queue
+      this.cacheQueue = this.cacheQueue.slice(toAdd.length);
+      logger.debug(`Saved ${toAdd.length} transactions to Redis cache, ${this.cacheQueue.length} left in queue`);
     } catch (e) {
-      logger.warn(`Failed to add ${newTransactions.length} transactions to Redis cache: ${e instanceof Error ? e.message : e}`);
-      return false;
+      logger.warn(`Failed to add ${toAdd.length} transactions to Redis cache: ${e instanceof Error ? e.message : e}`);
+      this.pauseFlush = true;
     }
   }
 
-  async $removeTransactions(transactions: string[]) {
-    try {
-      await this.$ensureConnected();
-      for (let i = 0; i < Math.ceil(transactions.length / 10000); i++) {
-        const slice = transactions.slice(i * 10000, (i + 1) * 10000);
-        await this.client.unlink(slice.map(txid => `mempool:tx:${txid}`));
-        logger.debug(`Deleted ${slice.length} transactions from the Redis cache`);
+  async $removeTransactions(transactions: string[]): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
+    const toRemove = this.removeQueue.concat(transactions);
+    this.removeQueue = [];
+    let failed: string[] = [];
+    let numRemoved = 0;
+    if (this.connected) {
+      const sliceLength = config.REDIS.BATCH_QUERY_BASE_SIZE;
+      for (let i = 0; i < Math.ceil(toRemove.length / sliceLength); i++) {
+        const slice = toRemove.slice(i * sliceLength, (i + 1) * sliceLength);
+        try {
+          await this.client.unlink(slice.map(txid => `mempool:tx:${txid}`));
+          numRemoved+= sliceLength;
+          logger.debug(`Deleted ${slice.length} transactions from the Redis cache`);
+        } catch (e) {
+          logger.warn(`Failed to remove ${slice.length} transactions from Redis cache: ${e instanceof Error ? e.message : e}`);
+          failed = failed.concat(slice);
+        }
       }
-    } catch (e) {
-      logger.warn(`Failed to remove ${transactions.length} transactions from Redis cache: ${e instanceof Error ? e.message : e}`);
+      // concat instead of replace, in case more txs have been added in the meantime
+      this.removeQueue = this.removeQueue.concat(failed);
+    } else {
+      this.removeQueue = this.removeQueue.concat(toRemove);
     }
   }
 
   async $setRbfEntry(type: string, txid: string, value: any): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
+    if (!this.connected) {
+      this.rbfCacheQueue.push({ type, txid, value });
+      logger.warn(`Failed to set RBF ${type} in Redis cache: Redis is not connected`);
+      return;
+    }
     try {
-      await this.$ensureConnected();
       await this.client.set(`rbf:${type}:${txid}`, JSON.stringify(value));
     } catch (e) {
       logger.warn(`Failed to set RBF ${type} in Redis cache: ${e instanceof Error ? e.message : e}`);
@@ -142,17 +222,55 @@ class RedisCache {
   }
 
   async $removeRbfEntry(type: string, txid: string): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
+    if (!this.connected) {
+      this.rbfRemoveQueue.push({ type, txid });
+      logger.warn(`Failed to remove RBF ${type} from Redis cache: Redis is not connected`);
+      return;
+    }
     try {
-      await this.$ensureConnected();
       await this.client.unlink(`rbf:${type}:${txid}`);
     } catch (e) {
       logger.warn(`Failed to remove RBF ${type} from Redis cache: ${e instanceof Error ? e.message : e}`);
     }
   }
 
-  async $getBlocks(): Promise<BlockExtended[]> {
+  private async $flushRbfQueues(): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
+    if (!this.connected) {
+      return;
+    }
+    try {
+      const toAdd = this.rbfCacheQueue;
+      this.rbfCacheQueue = [];
+      for (const { type, txid, value } of toAdd) {
+        await this.$setRbfEntry(type, txid, value);
+      }
+      logger.debug(`Saved ${toAdd.length} queued RBF entries to the Redis cache`);
+      const toRemove = this.rbfRemoveQueue;
+      this.rbfRemoveQueue = [];
+      for (const { type, txid } of toRemove) {
+        await this.$removeRbfEntry(type, txid);
+      }
+      logger.debug(`Removed ${toRemove.length} queued RBF entries from the Redis cache`);
+    } catch (e) {
+      logger.warn(`Failed to flush RBF cache event queues after reconnecting to Redis: ${e instanceof Error ? e.message : e}`);
+    }
+  }
+
+  async $getBlocks(): Promise<BlockExtended[]> {
+    if (!config.REDIS.ENABLED) {
+      return [];
+    }
+    if (!this.connected) {
+      logger.warn(`Failed to retrieve blocks from Redis cache: Redis is not connected`);
+      return [];
+    }
     try {
-      await this.$ensureConnected();
       const json = await this.client.get('blocks');
       return JSON.parse(json);
     } catch (e) {
@@ -162,8 +280,14 @@ class RedisCache {
   }
 
   async $getBlockSummaries(): Promise<BlockSummary[]> {
+    if (!config.REDIS.ENABLED) {
+      return [];
+    }
+    if (!this.connected) {
+      logger.warn(`Failed to retrieve blocks from Redis cache: Redis is not connected`);
+      return [];
+    }
     try {
-      await this.$ensureConnected();
       const json = await this.client.get('block-summaries');
       return JSON.parse(json);
     } catch (e) {
@@ -173,10 +297,16 @@ class RedisCache {
   }
 
   async $getMempool(): Promise<{ [txid: string]: MempoolTransactionExtended }> {
+    if (!config.REDIS.ENABLED) {
+      return {};
+    }
+    if (!this.connected) {
+      logger.warn(`Failed to retrieve mempool from Redis cache: Redis is not connected`);
+      return {};
+    }
     const start = Date.now();
     const mempool = {};
     try {
-      await this.$ensureConnected();
       const mempoolList = await this.scanKeys<MempoolTransactionExtended>('mempool:tx:*');
       for (const tx of mempoolList) {
         mempool[tx.key] = tx.value;
@@ -190,8 +320,14 @@ class RedisCache {
   }
 
   async $getRbfEntries(type: string): Promise<any[]> {
+    if (!config.REDIS.ENABLED) {
+      return [];
+    }
+    if (!this.connected) {
+      logger.warn(`Failed to retrieve Rbf ${type}s from Redis cache: Redis is not connected`);
+      return [];
+    }
     try {
-      await this.$ensureConnected();
       const rbfEntries = await this.scanKeys<MempoolTransactionExtended[]>(`rbf:${type}:*`);
       return rbfEntries;
     } catch (e) {
@@ -200,7 +336,10 @@ class RedisCache {
     }
   }
 
-  async $loadCache() {
+  async $loadCache(): Promise<void> {
+    if (!config.REDIS.ENABLED) {
+      return;
+    }
     logger.info('Restoring mempool and blocks data from Redis cache');
     // Load block data
     const loadedBlocks = await this.$getBlocks();
@@ -219,12 +358,13 @@ class RedisCache {
     await memPool.$setMempool(loadedMempool);
     await rbfCache.load({
       txs: rbfTxs,
-      trees: rbfTrees.map(loadedTree => loadedTree.value),
+      trees: rbfTrees.map(loadedTree => { loadedTree.value.key = loadedTree.key; return loadedTree.value; }),
       expiring: rbfExpirations,
+      mempool: memPool.getMempool(),
     });
   }
 
-  private inflateLoadedTxs(mempool: { [txid: string]: MempoolTransactionExtended }) {
+  private inflateLoadedTxs(mempool: { [txid: string]: MempoolTransactionExtended }): void {
     for (const tx of Object.values(mempool)) {
       for (const vin of tx.vin) {
         if (vin.scriptsig) {

backend/src/api/services/acceleration.ts

@@ -1,18 +1,64 @@
-import { query } from '../../utils/axios-query';
 import config from '../../config';
+import logger from '../../logger';
 import { BlockExtended, PoolTag } from '../../mempool.interfaces';
+import axios from 'axios';
 
 export interface Acceleration {
   txid: string,
   feeDelta: number,
   pools: number[],
-}
+};
+
+export interface AccelerationHistory {
+  txid: string,
+  status: string,
+  feePaid: number,
+  added: number,
+  lastUpdated: number,
+  baseFee: number,
+  vsizeFee: number,
+  effectiveFee: number,
+  effectiveVsize: number,
+  feeDelta: number,
+  blockHash: string,
+  blockHeight: number,
+  pools: {
+    pool_unique_id: number,
+    username: string,
+  }[],
+};
 
 class AccelerationApi {
-  public async $fetchAccelerations(): Promise<Acceleration[]> {
+  public async $fetchAccelerations(): Promise<Acceleration[] | null> {
     if (config.MEMPOOL_SERVICES.ACCELERATIONS) {
-      const response = await query(`${config.MEMPOOL_SERVICES.API}/accelerator/accelerations`);
-      return (response as Acceleration[]) || [];
+      try {
+        const response = await axios.get(`${config.MEMPOOL_SERVICES.API}/accelerator/accelerations`, { responseType: 'json', timeout: 10000 });
+        return response.data as Acceleration[];
+      } catch (e) {
+        logger.warn('Failed to fetch current accelerations from the mempool services backend: ' + (e instanceof Error ? e.message : e));
+        return null;
+      }
+    } else {
+      return [];
+    }
+  }
+
+  public async $fetchAccelerationHistory(page?: number, status?: string): Promise<AccelerationHistory[] | null> {
+    if (config.MEMPOOL_SERVICES.ACCELERATIONS) {
+      try {
+        const response = await axios.get(`${config.MEMPOOL_SERVICES.API}/accelerator/accelerations/history`, {
+          responseType: 'json',
+          timeout: 10000,
+          params: {
+            page,
+            status,
+          }
+        });
+        return response.data as AccelerationHistory[];
+      } catch (e) {
+        logger.warn('Failed to fetch acceleration history from the mempool services backend: ' + (e instanceof Error ? e.message : e));
+        return null;
+      }
     } else {
       return [];
     }

backend/src/api/statistics/statistics-api.ts

@@ -285,7 +285,7 @@ class StatisticsApi {
 
   public async $list2H(): Promise<OptimizedStatistic[]> {
     try {
-      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics ORDER BY statistics.added DESC LIMIT 120`;
+      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL 2 HOUR) AND NOW() ORDER BY statistics.added DESC`;
       const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
       return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
     } catch (e) {
@@ -296,7 +296,7 @@ class StatisticsApi {
 
   public async $list24H(): Promise<OptimizedStatistic[]> {
     try {
-      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics ORDER BY statistics.added DESC LIMIT 1440`;
+      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL 24 HOUR) AND NOW() ORDER BY statistics.added DESC`;
       const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
       return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
     } catch (e) {

backend/src/api/statistics/statistics.ts

@@ -6,6 +6,7 @@ import statisticsApi from './statistics-api';
 
 class Statistics {
   protected intervalTimer: NodeJS.Timer | undefined;
+  protected lastRun: number = 0;
   protected newStatisticsEntryCallback: ((stats: OptimizedStatistic) => void) | undefined;
 
   public setNewStatisticsEntryCallback(fn: (stats: OptimizedStatistic) => void) {
@@ -23,15 +24,21 @@ class Statistics {
     setTimeout(() => {
       this.runStatistics();
       this.intervalTimer = setInterval(() => {
-        this.runStatistics();
+        this.runStatistics(true);
       }, 1 * 60 * 1000);
     }, difference);
   }
 
-  private async runStatistics(): Promise<void> {
+  public async runStatistics(skipIfRecent = false): Promise<void> {
     if (!memPool.isInSync()) {
       return;
     }
+
+    if (skipIfRecent && new Date().getTime() / 1000 - this.lastRun < 30) {
+      return;
+    }
+
+    this.lastRun = new Date().getTime() / 1000;
     const currentMempool = memPool.getMempool();
     const txPerSecond = memPool.getTxPerSecond();
     const vBytesPerSecond = memPool.getVBytesPerSecond();

backend/src/api/transaction-utils.ts

@@ -116,7 +116,7 @@ class TransactionUtils {
   public extendMempoolTransaction(transaction: IEsploraApi.Transaction): MempoolTransactionExtended {
     const vsize = Math.ceil(transaction.weight / 4);
     const fractionalVsize = (transaction.weight / 4);
-    const sigops = !Common.isLiquid() ? this.countSigops(transaction) : 0;
+    let sigops = Common.isLiquid() ? 0 : (transaction.sigops != null ? transaction.sigops : this.countSigops(transaction));
     // https://github.com/bitcoin/bitcoin/blob/e9262ea32a6e1d364fb7974844fadc36f931f8c6/src/policy/policy.cpp#L295-L298
     const adjustedVsize = Math.max(fractionalVsize, sigops *  5); // adjusted vsize = Max(weight, sigops * bytes_per_sigop) / witness_scale_factor
     const feePerVbytes = (transaction.fee || 0) / fractionalVsize;
@@ -145,6 +145,10 @@ class TransactionUtils {
   }
 
   public countScriptSigops(script: string, isRawScript: boolean = false, witness: boolean = false): number {
+    if (!script?.length) {
+      return 0;
+    }
+
     let sigops = 0;
     // count OP_CHECKSIG and OP_CHECKSIGVERIFY
     sigops += (script.match(/OP_CHECKSIG/g)?.length || 0);
@@ -155,7 +159,7 @@ class TransactionUtils {
       sigops += 20 * (script.match(/OP_CHECKMULTISIG/g)?.length || 0);
     } else {
       // in redeem scripts and witnesses, worth N if preceded by OP_N, 20 otherwise
-      const matches = script.matchAll(/(?:OP_(\d+))? OP_CHECKMULTISIG/g);
+      const matches = script.matchAll(/(?:OP_(?:PUSHNUM_)?(\d+))? OP_CHECKMULTISIG/g);
       for (const match of matches) {
         const n = parseInt(match[1]);
         if (Number.isInteger(n)) {
@@ -189,6 +193,12 @@ class TransactionUtils {
               sigops += this.countScriptSigops(bitcoinjs.script.toASM(Buffer.from(input.witness[input.witness.length - 1], 'hex')), false, true);
             }
             break;
+
+          case input.prevout.scriptpubkey_type === 'p2sh':
+            if (input.inner_redeemscript_asm) {
+              sigops += this.countScriptSigops(input.inner_redeemscript_asm);
+            }
+            break;
         }
       }
     }

backend/src/api/tx-selection-worker.ts

@@ -173,10 +173,13 @@ function makeBlockTemplates(mempool: Map<number, CompactThreadTransaction>)
     // this block is full
     const exceededPackageTries = failures > 1000 && blockWeight > (config.MEMPOOL.BLOCK_WEIGHT_UNITS - 4000);
     const queueEmpty = top >= mempoolArray.length && modified.isEmpty();
+
     if ((exceededPackageTries || queueEmpty) && blocks.length < 7) {
       // construct this block
       if (transactions.length) {
         blocks.push(transactions.map(t => t.uid));
+      } else {
+        break;
       }
       // reset for the next block
       transactions = [];

backend/src/api/websocket-handler.ts

@@ -2,7 +2,7 @@ import logger from '../logger';
 import * as WebSocket from 'ws';
 import {
   BlockExtended, TransactionExtended, MempoolTransactionExtended, WebsocketResponse,
-  OptimizedStatistic, ILoadingIndicators
+  OptimizedStatistic, ILoadingIndicators, GbtCandidates, TxTrackingInfo,
 } from '../mempool.interfaces';
 import blocks from './blocks';
 import memPool from './mempool';
@@ -18,11 +18,21 @@ import feeApi from './fee-api';
 import BlocksAuditsRepository from '../repositories/BlocksAuditsRepository';
 import BlocksSummariesRepository from '../repositories/BlocksSummariesRepository';
 import Audit from './audit';
-import { deepClone } from '../utils/clone';
 import priceUpdater from '../tasks/price-updater';
 import { ApiPrice } from '../repositories/PricesRepository';
 import accelerationApi from './services/acceleration';
 import mempool from './mempool';
+import statistics from './statistics/statistics';
+import accelerationRepository from '../repositories/AccelerationRepository';
+import bitcoinApi from './bitcoin/bitcoin-api-factory';
+
+interface AddressTransactions {
+  mempool: MempoolTransactionExtended[],
+  confirmed: MempoolTransactionExtended[],
+  removed: MempoolTransactionExtended[],
+}
+import bitcoinSecondClient from './bitcoin/bitcoin-second-client';
+import { calculateCpfp } from './cpfp';
 
 // valid 'want' subscriptions
 const wantable = [
@@ -30,6 +40,7 @@ const wantable = [
   'mempool-blocks',
   'live-2h-chart',
   'stats',
+  'tomahawk',
 ];
 
 class WebsocketHandler {
@@ -42,7 +53,7 @@ class WebsocketHandler {
 
   private socketData: { [key: string]: string } = {};
   private serializedInitData: string = '{}';
-  private lastRbfSummary: ReplacementInfo | null = null;
+  private lastRbfSummary: ReplacementInfo[] | null = null;
 
   constructor() { }
 
@@ -72,6 +83,7 @@ class WebsocketHandler {
     const _blocks = blocks.getBlocks().slice(-config.MEMPOOL.INITIAL_BLOCKS_AMOUNT);
     const da = difficultyAdjustment.getDifficultyAdjustment();
     this.updateSocketDataFields({
+      'backend': config.MEMPOOL.BACKEND,
       'mempoolInfo': memPool.getMempoolInfo(),
       'vBytesPerSecond': memPool.getVBytesPerSecond(),
       'blocks': _blocks,
@@ -94,9 +106,13 @@ class WebsocketHandler {
       throw new Error('WebSocket.Server is not set');
     }
 
-    this.wss.on('connection', (client: WebSocket) => {
+    this.wss.on('connection', (client: WebSocket, req) => {
       this.numConnected++;
-      client.on('error', logger.info);
+      client['remoteAddress'] = req.headers['x-forwarded-for'] || req.socket?.remoteAddress || 'unknown';
+      client.on('error', (e) => {
+        logger.info(`websocket client error from ${client['remoteAddress']}: ` + (e instanceof Error ? e.message : e));
+        client.close();
+      });
       client.on('close', () => {
         this.numDisconnected++;
       });
@@ -110,7 +126,7 @@ class WebsocketHandler {
             for (const sub of wantable) {
               const key = `want-${sub}`;
               const wants = parsedMessage.data.includes(sub);
-              if (wants && client['wants'] && !client[key]) {
+              if (wants && !client[key]) {
                 wantNow[key] = true;
               }
               client[key] = wants;
@@ -134,6 +150,10 @@ class WebsocketHandler {
             response['da'] = this.socketData['da'];
           }
 
+          if (wantNow['want-tomahawk']) {
+            response['tomahawk'] = JSON.stringify(bitcoinApi.getHealthStatus());
+          }
+
           if (parsedMessage && parsedMessage['track-tx']) {
             if (/^[a-fA-F0-9]{64}$/.test(parsedMessage['track-tx'])) {
               client['track-tx'] = parsedMessage['track-tx'];
@@ -190,25 +210,96 @@ class WebsocketHandler {
             }
           }
 
+          if (parsedMessage && parsedMessage['track-txs']) {
+            const txids: string[] = [];
+            if (Array.isArray(parsedMessage['track-txs'])) {
+              for (const txid of parsedMessage['track-txs']) {
+                if (/^[a-fA-F0-9]{64}$/.test(txid)) {
+                  txids.push(txid);
+                }
+              }
+            }
+
+            const txs: { [txid: string]: TxTrackingInfo } = {};
+            for (const txid of txids) {
+              const txInfo: TxTrackingInfo = {
+                confirmed: true,
+              };
+              const rbfCacheTxid = rbfCache.getReplacedBy(txid);
+              if (rbfCacheTxid) {
+                txInfo.replacedBy = rbfCacheTxid;
+                txInfo.confirmed = false;
+              }
+              const tx = memPool.getMempool()[txid];
+              if (tx && tx.position) {
+                txInfo.position = {
+                  ...tx.position
+                };
+                if (tx.acceleration) {
+                  txInfo.accelerated = tx.acceleration;
+                }
+              }
+              if (tx) {
+                txInfo.confirmed = false;
+              }
+              txs[txid] = txInfo;
+            }
+
+            if (txids.length) {
+              client['track-txs'] = txids;
+            } else {
+              client['track-txs'] = null;
+            }
+
+            if (Object.keys(txs).length) {
+              response['tracked-txs'] = JSON.stringify(txs);
+            }
+          }
+
           if (parsedMessage && parsedMessage['track-address']) {
-            if (/^([a-km-zA-HJ-NP-Z1-9]{26,35}|[a-km-zA-HJ-NP-Z1-9]{80}|[a-z]{2,5}1[ac-hj-np-z02-9]{8,100}|[A-Z]{2,5}1[AC-HJ-NP-Z02-9]{8,100}|04[a-fA-F0-9]{128}|(02|03)[a-fA-F0-9]{64})$/
-              .test(parsedMessage['track-address'])) {
-              let matchedAddress = parsedMessage['track-address'];
-              if (/^[A-Z]{2,5}1[AC-HJ-NP-Z02-9]{8,100}$/.test(parsedMessage['track-address'])) {
-                matchedAddress = matchedAddress.toLowerCase();
-              }
-              if (/^04[a-fA-F0-9]{128}$/.test(parsedMessage['track-address'])) {
-                client['track-address'] = '41' + matchedAddress + 'ac';
-              } else if (/^(02|03)[a-fA-F0-9]{64}$/.test(parsedMessage['track-address'])) {
-                client['track-address'] = '21' + matchedAddress + 'ac';
-              } else {
-                client['track-address'] = matchedAddress;
-              }
+            const validAddress = this.testAddress(parsedMessage['track-address']);
+            if (validAddress) {
+              client['track-address'] = validAddress;
             } else {
               client['track-address'] = null;
             }
           }
 
+          if (parsedMessage && parsedMessage['track-addresses'] && Array.isArray(parsedMessage['track-addresses'])) {
+            const addressMap: { [address: string]: string } = {};
+            for (const address of parsedMessage['track-addresses']) {
+              const validAddress = this.testAddress(address);
+              if (validAddress) {
+                addressMap[address] = validAddress;
+              }
+            }
+            if (Object.keys(addressMap).length > config.MEMPOOL.MAX_TRACKED_ADDRESSES) {
+              response['track-addresses-error'] = `"too many addresses requested, this connection supports tracking a maximum of ${config.MEMPOOL.MAX_TRACKED_ADDRESSES} addresses"`;
+              client['track-addresses'] = null;
+            } else if (Object.keys(addressMap).length > 0) {
+              client['track-addresses'] = addressMap;
+            } else {
+              client['track-addresses'] = null;
+            }
+          }
+
+          if (parsedMessage && parsedMessage['track-scriptpubkeys'] && Array.isArray(parsedMessage['track-scriptpubkeys'])) {
+            const spks: string[] = [];
+            for (const spk of parsedMessage['track-scriptpubkeys']) {
+              if (/^[a-fA-F0-9]+$/.test(spk)) {
+                spks.push(spk.toLowerCase());
+              }
+            }
+            if (spks.length > config.MEMPOOL.MAX_TRACKED_ADDRESSES) {
+              response['track-scriptpubkeys-error'] = `"too many scriptpubkeys requested, this connection supports tracking a maximum of ${config.MEMPOOL.MAX_TRACKED_ADDRESSES} scriptpubkeys"`;
+              client['track-scriptpubkeys'] = null;
+            } else if (spks.length) {
+              client['track-scriptpubkeys'] = spks;
+            } else {
+              client['track-scriptpubkeys'] = null;
+            }
+          }
+
           if (parsedMessage && parsedMessage['track-asset']) {
             if (/^[a-fA-F0-9]{64}$/.test(parsedMessage['track-asset'])) {
               client['track-asset'] = parsedMessage['track-asset'];
@@ -224,7 +315,7 @@ class WebsocketHandler {
               const mBlocksWithTransactions = mempoolBlocks.getMempoolBlocksWithTransactions();
               response['projected-block-transactions'] = JSON.stringify({
                 index: index,
-                blockTransactions: mBlocksWithTransactions[index]?.transactions || [],
+                blockTransactions: (mBlocksWithTransactions[index]?.transactions || []).map(mempoolBlocks.compressTx),
               });
             } else {
               client['track-mempool-block'] = null;
@@ -269,20 +360,12 @@ class WebsocketHandler {
             client['track-donation'] = parsedMessage['track-donation'];
           }
 
-          if (parsedMessage['track-bisq-market']) {
-            if (/^[a-z]{3}_[a-z]{3}$/.test(parsedMessage['track-bisq-market'])) {
-              client['track-bisq-market'] = parsedMessage['track-bisq-market'];
-            } else {
-              client['track-bisq-market'] = null;
-            }
-          }
-
           if (Object.keys(response).length) {
-            const serializedResponse = this.serializeResponse(response);
-            client.send(serializedResponse);
+            client.send(this.serializeResponse(response));
           }
         } catch (e) {
-          logger.debug('Error parsing websocket message: ' + (e instanceof Error ? e.message : e));
+          logger.debug(`Error parsing websocket message from ${client['remoteAddress']}: ` + (e instanceof Error ? e.message : e));
+          client.close();
         }
       });
     });
@@ -387,28 +470,32 @@ class WebsocketHandler {
       }
 
       if (Object.keys(response).length) {
-        const serializedResponse = this.serializeResponse(response);
-        client.send(serializedResponse);
+        client.send(this.serializeResponse(response));
       }
     });
   }
 
   async $handleMempoolChange(newMempool: { [txid: string]: MempoolTransactionExtended }, mempoolSize: number,
-    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[]): Promise<void> {
+    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[],
+    candidates?: GbtCandidates): Promise<void> {
     if (!this.wss) {
       throw new Error('WebSocket.Server is not set');
     }
 
     this.printLogs();
 
-    if (config.MEMPOOL.ADVANCED_GBT_MEMPOOL) {
-      if (config.MEMPOOL.RUST_GBT) {
-        await mempoolBlocks.$rustUpdateBlockTemplates(newMempool, mempoolSize, newTransactions, deletedTransactions, config.MEMPOOL_SERVICES.ACCELERATIONS);
-      } else {
-        await mempoolBlocks.$updateBlockTemplates(newMempool, newTransactions, deletedTransactions, accelerationDelta, true, config.MEMPOOL_SERVICES.ACCELERATIONS);
-      }
+    const transactionIds = (memPool.limitGBT && candidates) ? Object.keys(candidates?.txs || {}) : Object.keys(newMempool);
+    let added = newTransactions;
+    let removed = deletedTransactions;
+    if (memPool.limitGBT) {
+      added = candidates?.added || [];
+      removed = candidates?.removed || [];
+    }
+
+    if (config.MEMPOOL.RUST_GBT) {
+      await mempoolBlocks.$rustUpdateBlockTemplates(transactionIds, newMempool, added, removed, candidates, config.MEMPOOL_SERVICES.ACCELERATIONS);
     } else {
-      mempoolBlocks.updateMempoolBlocks(newMempool, true);
+      await mempoolBlocks.$updateBlockTemplates(transactionIds, newMempool, added, removed, candidates, accelerationDelta, true, config.MEMPOOL_SERVICES.ACCELERATIONS);
     }
 
     const mBlocks = mempoolBlocks.getMempoolBlocks();
@@ -422,10 +509,11 @@ class WebsocketHandler {
     let rbfReplacements;
     let fullRbfReplacements;
     let rbfSummary;
-    if (Object.keys(rbfChanges.trees).length) {
+    if (Object.keys(rbfChanges.trees).length || !this.lastRbfSummary) {
       rbfReplacements = rbfCache.getRbfTrees(false);
       fullRbfReplacements = rbfCache.getRbfTrees(true);
-      rbfSummary = rbfCache.getLatestRbfSummary();
+      rbfSummary = rbfCache.getLatestRbfSummary() || [];
+      this.lastRbfSummary = rbfSummary;
     }
 
     for (const deletedTx of deletedTransactions) {
@@ -468,6 +556,11 @@ class WebsocketHandler {
       if (client['track-tx']) {
         trackedTxs.add(client['track-tx']);
       }
+      if (client['track-txs']) {
+        for (const txid of client['track-txs']) {
+          trackedTxs.add(txid);
+        }
+      }
     });
     if (trackedTxs.size > 0) {
       for (const tx of newTransactions) {
@@ -509,6 +602,10 @@ class WebsocketHandler {
         response['mempool-blocks'] = getCachedResponse('mempool-blocks', mBlocks);
       }
 
+      if (client['want-tomahawk']) {
+        response['tomahawk'] = getCachedResponse('tomahawk', bitcoinApi.getHealthStatus());
+      }
+
       if (client['track-mempool-tx']) {
         const tx = newTransactions.find((t) => t.txid === client['track-mempool-tx']);
         if (tx) {
@@ -541,6 +638,50 @@ class WebsocketHandler {
         }
       }
 
+      if (client['track-addresses']) {
+        const addressMap: { [address: string]: AddressTransactions } = {};
+        for (const [address, key] of Object.entries(client['track-addresses'] || {})) {
+          const newTransactions = Array.from(addressCache[key as string]?.values() || []);
+          const removedTransactions = Array.from(removedAddressCache[key as string]?.values() || []);
+          // txs may be missing prevouts in non-esplora backends
+          // so fetch the full transactions now
+          const fullTransactions = (config.MEMPOOL.BACKEND !== 'esplora') ? await this.getFullTransactions(newTransactions) : newTransactions;
+          if (fullTransactions?.length) {
+            addressMap[address] = {
+              mempool: fullTransactions,
+              confirmed: [],
+              removed: removedTransactions,
+            };
+          }
+        }
+
+        if (Object.keys(addressMap).length > 0) {
+          response['multi-address-transactions'] = JSON.stringify(addressMap);
+        }
+      }
+
+      if (client['track-scriptpubkeys']) {
+        const spkMap: { [spk: string]: AddressTransactions } = {};
+        for (const spk of client['track-scriptpubkeys'] || []) {
+          const newTransactions = Array.from(addressCache[spk as string]?.values() || []);
+          const removedTransactions = Array.from(removedAddressCache[spk as string]?.values() || []);
+          // txs may be missing prevouts in non-esplora backends
+          // so fetch the full transactions now
+          const fullTransactions = (config.MEMPOOL.BACKEND !== 'esplora') ? await this.getFullTransactions(newTransactions) : newTransactions;
+          if (fullTransactions?.length) {
+            spkMap[spk] = {
+              mempool: fullTransactions,
+              confirmed: [],
+              removed: removedTransactions,
+            };
+          }
+        }
+
+        if (Object.keys(spkMap).length > 0) {
+          response['multi-scriptpubkey-transactions'] = JSON.stringify(spkMap);
+        }
+      }
+
       if (client['track-asset']) {
         const foundTransactions: TransactionExtended[] = [];
 
@@ -577,7 +718,7 @@ class WebsocketHandler {
           response['utxoSpent'] = JSON.stringify(outspends);
         }
 
-        const rbfReplacedBy = rbfCache.getReplacedBy(client['track-tx']);
+        const rbfReplacedBy = rbfChanges.map[client['track-tx']] ? rbfCache.getReplacedBy(client['track-tx']) : false;
         if (rbfReplacedBy) {
           response['rbfTransaction'] = JSON.stringify({
             txid: rbfReplacedBy,
@@ -598,6 +739,9 @@ class WebsocketHandler {
               accelerated: mempoolTx.acceleration || undefined,
             }
           };
+          if (!mempoolTx.cpfpChecked) {
+            calculateCpfp(mempoolTx, newMempool);
+          }
           if (mempoolTx.cpfpDirty) {
             positionData['cpfp'] = {
               ancestors: mempoolTx.ancestors,
@@ -613,6 +757,46 @@ class WebsocketHandler {
         }
       }
 
+      if (client['track-txs']) {
+        const txids = client['track-txs'];
+        const txs: { [txid: string]: TxTrackingInfo } = {};
+        for (const txid of txids) {
+          const txInfo: TxTrackingInfo = {};
+          const outspends = outspendCache[txid];
+          if (outspends && Object.keys(outspends).length) {
+            txInfo.utxoSpent = outspends;
+          }
+          const replacedBy = rbfChanges.map[txid] ? rbfCache.getReplacedBy(txid) : false;
+          if (replacedBy) {
+            txInfo.replacedBy = replacedBy;
+          }
+          const mempoolTx = newMempool[txid];
+          if (mempoolTx && mempoolTx.position) {
+            txInfo.position = {
+              ...mempoolTx.position,
+              accelerated: mempoolTx.acceleration || undefined,
+            };
+            if (!mempoolTx.cpfpChecked) {
+              calculateCpfp(mempoolTx, newMempool);
+            }
+            if (mempoolTx.cpfpDirty) {
+              txInfo.cpfp = {
+                ancestors: mempoolTx.ancestors,
+                bestDescendant: mempoolTx.bestDescendant || null,
+                descendants: mempoolTx.descendants || null,
+                effectiveFeePerVsize: mempoolTx.effectiveFeePerVsize || null,
+                sigops: mempoolTx.sigops,
+                adjustedVsize: mempoolTx.adjustedVsize,
+              };
+            }
+          }
+          txs[txid] = txInfo;
+        }
+        if (Object.keys(txs).length) {
+          response['tracked-txs'] = JSON.stringify(txs);
+        }
+      }
+
       if (client['track-mempool-block'] >= 0 && memPool.isInSync()) {
         const index = client['track-mempool-block'];
         if (mBlockDeltas[index]) {
@@ -634,8 +818,7 @@ class WebsocketHandler {
       }
 
       if (Object.keys(response).length) {
-        const serializedResponse = this.serializeResponse(response);
-        client.send(serializedResponse);
+        client.send(this.serializeResponse(response));
       }
     });
   }
@@ -646,8 +829,15 @@ class WebsocketHandler {
     }
 
     this.printLogs();
+    await statistics.runStatistics();
 
     const _memPool = memPool.getMempool();
+    const candidateTxs = await memPool.getMempoolCandidates();
+    let candidates: GbtCandidates | undefined = (memPool.limitGBT && candidateTxs) ? { txs: candidateTxs, added: [], removed: [] } : undefined;
+    let transactionIds: string[] = (memPool.limitGBT) ? Object.keys(candidates?.txs || {}) : Object.keys(_memPool);
+
+    const accelerations = Object.values(mempool.getAccelerations());
+    await accelerationRepository.$indexAccelerationsForBlock(block, accelerations, transactions);
 
     const rbfTransactions = Common.findMinedRbfTransactions(transactions, memPool.getSpendMap());
     memPool.handleMinedRbfTransactions(rbfTransactions);
@@ -655,36 +845,23 @@ class WebsocketHandler {
 
     if (config.MEMPOOL.AUDIT && memPool.isInSync()) {
       let projectedBlocks;
-      let auditMempool = _memPool;
+      const auditMempool = _memPool;
       const isAccelerated = config.MEMPOOL_SERVICES.ACCELERATIONS && accelerationApi.isAcceleratedBlock(block, Object.values(mempool.getAccelerations()));
-      // template calculation functions have mempool side effects, so calculate audits using
-      // a cloned copy of the mempool if we're running a different algorithm for mempool updates
-      const separateAudit = config.MEMPOOL.ADVANCED_GBT_AUDIT !== config.MEMPOOL.ADVANCED_GBT_MEMPOOL;
-      if (separateAudit) {
-        auditMempool = deepClone(_memPool);
-        if (config.MEMPOOL.ADVANCED_GBT_AUDIT) {
-          if (config.MEMPOOL.RUST_GBT) {
-            projectedBlocks = await mempoolBlocks.$oneOffRustBlockTemplates(auditMempool, isAccelerated, block.extras.pool.id);
-          } else {
-            projectedBlocks = await mempoolBlocks.$makeBlockTemplates(auditMempool, false, isAccelerated, block.extras.pool.id);
-          }
+
+      if ((config.MEMPOOL_SERVICES.ACCELERATIONS)) {
+        if (config.MEMPOOL.RUST_GBT) {
+          const added = memPool.limitGBT ? (candidates?.added || []) : [];
+          const removed = memPool.limitGBT ? (candidates?.removed || []) : [];
+          projectedBlocks = await mempoolBlocks.$rustUpdateBlockTemplates(transactionIds, auditMempool, added, removed, candidates, isAccelerated, block.extras.pool.id);
         } else {
-          projectedBlocks = mempoolBlocks.updateMempoolBlocks(auditMempool, false);
+          projectedBlocks = await mempoolBlocks.$makeBlockTemplates(transactionIds, auditMempool, candidates, false, isAccelerated, block.extras.pool.id);
         }
       } else {
-        if ((config.MEMPOOL_SERVICES.ACCELERATIONS)) {
-          if (config.MEMPOOL.RUST_GBT) {
-            projectedBlocks = await mempoolBlocks.$rustUpdateBlockTemplates(auditMempool, Object.keys(auditMempool).length, [], [], isAccelerated, block.extras.pool.id);
-          } else {
-            projectedBlocks = await mempoolBlocks.$makeBlockTemplates(auditMempool, false, isAccelerated, block.extras.pool.id);
-          }
-        } else {
-          projectedBlocks = mempoolBlocks.getMempoolBlocksWithTransactions();
-        }
+        projectedBlocks = mempoolBlocks.getMempoolBlocksWithTransactions();
       }
 
       if (Common.indexingEnabled()) {
-        const { censored, added, fresh, sigop, fullrbf, accelerated, score, similarity } = Audit.auditBlock(transactions, projectedBlocks, auditMempool);
+        const { censored, added, prioritized, fresh, sigop, fullrbf, accelerated, score, similarity } = Audit.auditBlock(transactions, projectedBlocks, auditMempool);
         const matchRate = Math.round(score * 100 * 100) / 100;
 
         const stripped = projectedBlocks[0]?.transactions ? projectedBlocks[0].transactions : [];
@@ -701,7 +878,8 @@ class WebsocketHandler {
           template: {
             id: block.id,
             transactions: stripped,
-          }
+          },
+          version: 1,
         });
 
         BlocksAuditsRepository.$saveAudit({
@@ -709,6 +887,7 @@ class WebsocketHandler {
           height: block.height,
           hash: block.id,
           addedTxs: added,
+          prioritizedTxs: prioritized,
           missingTxs: censored,
           freshTxs: fresh,
           sigopTxs: sigop,
@@ -733,20 +912,32 @@ class WebsocketHandler {
       }
     }
 
+    const confirmedTxids: { [txid: string]: boolean } = {};
+
     // Update mempool to remove transactions included in the new block
     for (const txId of txIds) {
       delete _memPool[txId];
       rbfCache.mined(txId);
+      confirmedTxids[txId] = true;
     }
 
-    if (config.MEMPOOL.ADVANCED_GBT_MEMPOOL) {
-      if (config.MEMPOOL.RUST_GBT) {
-        await mempoolBlocks.$rustUpdateBlockTemplates(_memPool, Object.keys(_memPool).length, [], transactions, true);
-      } else {
-        await mempoolBlocks.$makeBlockTemplates(_memPool, true, config.MEMPOOL_SERVICES.ACCELERATIONS);
-      }
+    if (memPool.limitGBT) {
+      const minFeeMempool = memPool.limitGBT ? await bitcoinSecondClient.getRawMemPool() : null;
+      const minFeeTip = memPool.limitGBT ? await bitcoinSecondClient.getBlockCount() : -1;
+      candidates = await memPool.getNextCandidates(minFeeMempool, minFeeTip, transactions);
+      transactionIds = Object.keys(candidates?.txs || {});
     } else {
-      mempoolBlocks.updateMempoolBlocks(_memPool, true);
+      candidates = undefined;
+      transactionIds = Object.keys(memPool.getMempool());
+    }
+
+
+    if (config.MEMPOOL.RUST_GBT) {
+      const added = memPool.limitGBT ? (candidates?.added || []) : [];
+      const removed = memPool.limitGBT ? (candidates?.removed || []) : transactions;
+      await mempoolBlocks.$rustUpdateBlockTemplates(transactionIds, _memPool, added, removed, candidates, true);
+    } else {
+      await mempoolBlocks.$makeBlockTemplates(transactionIds, _memPool, candidates, true, config.MEMPOOL_SERVICES.ACCELERATIONS);
     }
     const mBlocks = mempoolBlocks.getMempoolBlocks();
     const mBlockDeltas = mempoolBlocks.getMempoolBlockDeltas();
@@ -768,6 +959,8 @@ class WebsocketHandler {
       'fees': fees,
     });
 
+    const mBlocksWithTransactions = mempoolBlocks.getMempoolBlocksWithTransactions();
+
     const responseCache = { ...this.socketData };
     function getCachedResponse(key, data): string {
       if (!responseCache[key]) {
@@ -801,9 +994,13 @@ class WebsocketHandler {
         response['mempool-blocks'] = getCachedResponse('mempool-blocks', mBlocks);
       }
 
+      if (client['want-tomahawk']) {
+        response['tomahawk'] = getCachedResponse('tomahawk', bitcoinApi.getHealthStatus());
+      }
+
       if (client['track-tx']) {
         const trackTxid = client['track-tx'];
-        if (trackTxid && txIds.indexOf(trackTxid) > -1) {
+        if (trackTxid && confirmedTxids[trackTxid]) {
           response['txConfirmed'] = JSON.stringify(trackTxid);
         } else {
           const mempoolTx = _memPool[trackTxid];
@@ -819,6 +1016,28 @@ class WebsocketHandler {
         }
       }
 
+      if (client['track-txs']) {
+        const txs: { [txid: string]: TxTrackingInfo } = {};
+        for (const txid of client['track-txs']) {
+          if (confirmedTxids[txid]) {
+            txs[txid] = { confirmed: true };
+          } else {
+            const mempoolTx = _memPool[txid];
+            if (mempoolTx && mempoolTx.position) {
+              txs[txid] = {
+                position: {
+                  ...mempoolTx.position,
+                },
+                accelerated: mempoolTx.acceleration || undefined,
+              };
+            }
+          }
+        }
+        if (Object.keys(txs).length) {
+          response['tracked-txs'] = JSON.stringify(txs);
+        }
+      }
+
       if (client['track-address']) {
         const foundTransactions: TransactionExtended[] = Array.from(addressCache[client['track-address']]?.values() || []);
 
@@ -836,6 +1055,42 @@ class WebsocketHandler {
         }
       }
 
+      if (client['track-addresses']) {
+        const addressMap: { [address: string]: AddressTransactions } = {};
+        for (const [address, key] of Object.entries(client['track-addresses'] || {})) {
+          const fullTransactions = Array.from(addressCache[key as string]?.values() || []);
+          if (fullTransactions?.length) {
+            addressMap[address] = {
+              mempool: [],
+              confirmed: fullTransactions,
+              removed: [],
+            };
+          }
+        }
+
+        if (Object.keys(addressMap).length > 0) {
+          response['multi-address-transactions'] = JSON.stringify(addressMap);
+        }
+      }
+
+      if (client['track-scriptpubkeys']) {
+        const spkMap: { [spk: string]: AddressTransactions } = {};
+        for (const spk of client['track-scriptpubkeys'] || []) {
+          const fullTransactions = Array.from(addressCache[spk as string]?.values() || []);
+          if (fullTransactions?.length) {
+            spkMap[spk] = {
+              mempool: [],
+              confirmed: fullTransactions,
+              removed: [],
+            };
+          }
+        }
+
+        if (Object.keys(spkMap).length > 0) {
+          response['multi-scriptpubkey-transactions'] = JSON.stringify(spkMap);
+        }
+      }
+
       if (client['track-asset']) {
         const foundTransactions: TransactionExtended[] = [];
 
@@ -875,19 +1130,28 @@ class WebsocketHandler {
 
       if (client['track-mempool-block'] >= 0 && memPool.isInSync()) {
         const index = client['track-mempool-block'];
-        if (mBlockDeltas && mBlockDeltas[index]) {
-          response['projected-block-transactions'] = getCachedResponse(`projected-block-transactions-${index}`, {
-            index: index,
-            delta: mBlockDeltas[index],
-          });
+
+        if (mBlockDeltas && mBlockDeltas[index] && mBlocksWithTransactions[index]?.transactions?.length) {
+          if (mBlockDeltas[index].added.length > (mBlocksWithTransactions[index]?.transactions.length / 2)) {
+            response['projected-block-transactions'] = getCachedResponse(`projected-block-transactions-full-${index}`, {
+              index: index,
+              blockTransactions: mBlocksWithTransactions[index].transactions.map(mempoolBlocks.compressTx),
+            });
+          } else {
+            response['projected-block-transactions'] = getCachedResponse(`projected-block-transactions-delta-${index}`, {
+              index: index,
+              delta: mBlockDeltas[index],
+            });
+          }
         }
       }
 
       if (Object.keys(response).length) {
-        const serializedResponse = this.serializeResponse(response);
-        client.send(serializedResponse);
+        client.send(this.serializeResponse(response));
       }
     });
+
+    await statistics.runStatistics();
   }
 
   // takes a dictionary of JSON serialized values
@@ -898,6 +1162,28 @@ class WebsocketHandler {
         + '}';
   }
 
+  // checks if an address conforms to a valid format
+  // returns the canonical form:
+  //  - lowercase for bech32(m)
+  //  - lowercase scriptpubkey for P2PK
+  // or false if invalid
+  private testAddress(address): string | false {
+    if (/^([a-km-zA-HJ-NP-Z1-9]{26,35}|[a-km-zA-HJ-NP-Z1-9]{80}|[a-z]{2,5}1[ac-hj-np-z02-9]{8,100}|[A-Z]{2,5}1[AC-HJ-NP-Z02-9]{8,100}|04[a-fA-F0-9]{128}|(02|03)[a-fA-F0-9]{64})$/.test(address)) {
+      if (/^[A-Z]{2,5}1[AC-HJ-NP-Z02-9]{8,100}|04[a-fA-F0-9]{128}|(02|03)[a-fA-F0-9]{64}$/.test(address)) {
+        address = address.toLowerCase();
+      }
+      if (/^04[a-fA-F0-9]{128}$/.test(address)) {
+        return '41' + address + 'ac';
+      } else if (/^(02|03)[a-fA-F0-9]{64}$/.test(address)) {
+        return '21' + address + 'ac';
+      } else {
+        return address;
+      }
+    } else {
+      return false;
+    }
+  }
+
   private makeAddressCache(transactions: MempoolTransactionExtended[]): { [address: string]: Set<MempoolTransactionExtended> } {
     const addressCache: { [address: string]: Set<MempoolTransactionExtended> } = {};
     for (const tx of transactions) {
@@ -946,10 +1232,31 @@ class WebsocketHandler {
 
   private printLogs(): void {
     if (this.wss) {
+      let numTxSubs = 0;
+      let numTxsSubs = 0;
+      let numProjectedSubs = 0;
+      let numRbfSubs = 0;
+
+      this.wss.clients.forEach((client) => {
+        if (client['track-tx']) {
+          numTxSubs++;
+        }
+        if (client['track-txs']) {
+          numTxsSubs++;
+        }
+        if (client['track-mempool-block'] != null && client['track-mempool-block'] >= 0) {
+          numProjectedSubs++;
+        }
+        if (client['track-rbf']) {
+          numRbfSubs++;
+        }
+      })
+
       const count = this.wss?.clients?.size || 0;
       const diff = count - this.numClients;
       this.numClients = count;
       logger.debug(`${count} websocket clients | ${this.numConnected} connected | ${this.numDisconnected} disconnected | (${diff >= 0 ? '+' : ''}${diff})`);
+      logger.debug(`websocket subscriptions: track-tx: ${numTxSubs}, track-txs: ${numTxsSubs}, track-mempool-block: ${numProjectedSubs} track-rbf: ${numRbfSubs}`);
       this.numConnected = 0;
       this.numDisconnected = 0;
     }

backend/src/config.ts

@@ -5,6 +5,7 @@ const configFromFile = require(
 interface IConfig {
   MEMPOOL: {
     ENABLED: boolean;
+    OFFICIAL: boolean;
     NETWORK: 'mainnet' | 'testnet' | 'signet' | 'liquid' | 'liquidtestnet';
     BACKEND: 'esplora' | 'electrum' | 'none';
     HTTP_PORT: number;
@@ -20,6 +21,7 @@ interface IConfig {
     MEMPOOL_BLOCKS_AMOUNT: number;
     INDEXING_BLOCKS_AMOUNT: number;
     BLOCKS_SUMMARIES_INDEXING: boolean;
+    GOGGLES_INDEXING: boolean;
     USE_SECOND_NODE_FOR_MINFEE: boolean;
     EXTERNAL_ASSETS: string[];
     EXTERNAL_MAX_RETRY: number;
@@ -30,20 +32,23 @@ interface IConfig {
     POOLS_JSON_URL: string,
     POOLS_JSON_TREE_URL: string,
     AUDIT: boolean;
-    ADVANCED_GBT_AUDIT: boolean;
-    ADVANCED_GBT_MEMPOOL: boolean;
     RUST_GBT: boolean;
+    LIMIT_GBT: boolean;
     CPFP_INDEXING: boolean;
     MAX_BLOCKS_BULK_QUERY: number;
     DISK_CACHE_BLOCK_INTERVAL: number;
     MAX_PUSH_TX_SIZE_WEIGHT: number;
     ALLOW_UNREACHABLE: boolean;
     PRICE_UPDATES_PER_HOUR: number;
+    MAX_TRACKED_ADDRESSES: number;
   };
   ESPLORA: {
     REST_API_URL: string;
     UNIX_SOCKET_PATH: string | void | null;
+    BATCH_QUERY_BASE_SIZE: number;
     RETRY_UNIX_SOCKET_AFTER: number;
+    REQUEST_TIMEOUT: number;
+    FALLBACK_TIMEOUT: number;
     FALLBACK: string[];
   };
   LIGHTNING: {
@@ -76,6 +81,8 @@ interface IConfig {
     USERNAME: string;
     PASSWORD: string;
     TIMEOUT: number;
+    COOKIE: boolean;
+    COOKIE_PATH: string;
   };
   SECOND_CORE_RPC: {
     HOST: string;
@@ -83,6 +90,8 @@ interface IConfig {
     USERNAME: string;
     PASSWORD: string;
     TIMEOUT: number;
+    COOKIE: boolean;
+    COOKIE_PATH: string;
   };
   DATABASE: {
     ENABLED: boolean;
@@ -94,6 +103,7 @@ interface IConfig {
     PASSWORD: string;
     TIMEOUT: number;
     PID_DIR: string;
+    POOL_SIZE: number;
   };
   SYSLOG: {
     ENABLED: boolean;
@@ -106,10 +116,6 @@ interface IConfig {
     ENABLED: boolean;
     TX_PER_SECOND_SAMPLE_PERIOD: number;
   };
-  BISQ: {
-    ENABLED: boolean;
-    DATA_PATH: string;
-  };
   SOCKS5PROXY: {
     ENABLED: boolean;
     USE_ONION: boolean;
@@ -123,8 +129,6 @@ interface IConfig {
     MEMPOOL_ONION: string;
     LIQUID_API: string;
     LIQUID_ONION: string;
-    BISQ_URL: string;
-    BISQ_ONION: string;
   };
   MAXMIND: {
     ENABLED: boolean;
@@ -145,12 +149,18 @@ interface IConfig {
   REDIS: {
     ENABLED: boolean;
     UNIX_SOCKET_PATH: string;
+    BATCH_QUERY_BASE_SIZE: number;
+  },
+  FIAT_PRICE: {
+    ENABLED: boolean;
+    API_KEY: string;
   },
 }
 
 const defaults: IConfig = {
   'MEMPOOL': {
     'ENABLED': true,
+    'OFFICIAL': false,
     'NETWORK': 'mainnet',
     'BACKEND': 'none',
     'HTTP_PORT': 8999,
@@ -166,6 +176,7 @@ const defaults: IConfig = {
     'MEMPOOL_BLOCKS_AMOUNT': 8,
     'INDEXING_BLOCKS_AMOUNT': 11000, // 0 = disable indexing, -1 = index all blocks
     'BLOCKS_SUMMARIES_INDEXING': false,
+    'GOGGLES_INDEXING': false,
     'USE_SECOND_NODE_FOR_MINFEE': false,
     'EXTERNAL_ASSETS': [],
     'EXTERNAL_MAX_RETRY': 1,
@@ -176,20 +187,23 @@ const defaults: IConfig = {
     'POOLS_JSON_URL': 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json',
     'POOLS_JSON_TREE_URL': 'https://api.github.com/repos/mempool/mining-pools/git/trees/master',
     'AUDIT': false,
-    'ADVANCED_GBT_AUDIT': false,
-    'ADVANCED_GBT_MEMPOOL': false,
     'RUST_GBT': false,
+    'LIMIT_GBT': false,
     'CPFP_INDEXING': false,
     'MAX_BLOCKS_BULK_QUERY': 0,
     'DISK_CACHE_BLOCK_INTERVAL': 6,
     'MAX_PUSH_TX_SIZE_WEIGHT': 400000,
     'ALLOW_UNREACHABLE': true,
     'PRICE_UPDATES_PER_HOUR': 1,
+    'MAX_TRACKED_ADDRESSES': 1,
   },
   'ESPLORA': {
     'REST_API_URL': 'http://127.0.0.1:3000',
     'UNIX_SOCKET_PATH': null,
+    'BATCH_QUERY_BASE_SIZE': 1000,
     'RETRY_UNIX_SOCKET_AFTER': 30000,
+    'REQUEST_TIMEOUT': 10000,
+    'FALLBACK_TIMEOUT': 5000,
     'FALLBACK': [],
   },
   'ELECTRUM': {
@@ -203,6 +217,8 @@ const defaults: IConfig = {
     'USERNAME': 'mempool',
     'PASSWORD': 'mempool',
     'TIMEOUT': 60000,
+    'COOKIE': false,
+    'COOKIE_PATH': '/bitcoin/.cookie'
   },
   'SECOND_CORE_RPC': {
     'HOST': '127.0.0.1',
@@ -210,6 +226,8 @@ const defaults: IConfig = {
     'USERNAME': 'mempool',
     'PASSWORD': 'mempool',
     'TIMEOUT': 60000,
+    'COOKIE': false,
+    'COOKIE_PATH': '/bitcoin/.cookie'
   },
   'DATABASE': {
     'ENABLED': true,
@@ -221,6 +239,7 @@ const defaults: IConfig = {
     'PASSWORD': 'mempool',
     'TIMEOUT': 180000,
     'PID_DIR': '',
+    'POOL_SIZE': 100,
   },
   'SYSLOG': {
     'ENABLED': true,
@@ -233,10 +252,6 @@ const defaults: IConfig = {
     'ENABLED': true,
     'TX_PER_SECOND_SAMPLE_PERIOD': 150
   },
-  'BISQ': {
-    'ENABLED': false,
-    'DATA_PATH': '/bisq/statsnode-data/btc_mainnet/db'
-  },
   'LIGHTNING': {
     'ENABLED': false,
     'BACKEND': 'lnd',
@@ -268,9 +283,7 @@ const defaults: IConfig = {
     'MEMPOOL_API': 'https://mempool.space/api/v1',
     'MEMPOOL_ONION': 'http://mempoolhqx4isw62xs7abwphsq7ldayuidyx2v2oethdhhj6mlo2r6ad.onion/api/v1',
     'LIQUID_API': 'https://liquid.network/api/v1',
-    'LIQUID_ONION': 'http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1',
-    'BISQ_URL': 'https://bisq.markets/api',
-    'BISQ_ONION': 'http://bisqmktse2cabavbr2xjq7xw3h6g5ottemo5rolfcwt6aly6tp5fdryd.onion/api'
+    'LIQUID_ONION': 'http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1'
   },
   'MAXMIND': {
     'ENABLED': false,
@@ -291,6 +304,11 @@ const defaults: IConfig = {
   'REDIS': {
     'ENABLED': false,
     'UNIX_SOCKET_PATH': '',
+    'BATCH_QUERY_BASE_SIZE': 5000,
+  },
+  'FIAT_PRICE': {
+    'ENABLED': true,
+    'API_KEY': '',
   },
 };
 
@@ -303,7 +321,6 @@ class Config implements IConfig {
   DATABASE: IConfig['DATABASE'];
   SYSLOG: IConfig['SYSLOG'];
   STATISTICS: IConfig['STATISTICS'];
-  BISQ: IConfig['BISQ'];
   LIGHTNING: IConfig['LIGHTNING'];
   LND: IConfig['LND'];
   CLIGHTNING: IConfig['CLIGHTNING'];
@@ -313,6 +330,7 @@ class Config implements IConfig {
   REPLICATION: IConfig['REPLICATION'];
   MEMPOOL_SERVICES: IConfig['MEMPOOL_SERVICES'];
   REDIS: IConfig['REDIS'];
+  FIAT_PRICE: IConfig['FIAT_PRICE'];
 
   constructor() {
     const configs = this.merge(configFromFile, defaults);
@@ -324,7 +342,6 @@ class Config implements IConfig {
     this.DATABASE = configs.DATABASE;
     this.SYSLOG = configs.SYSLOG;
     this.STATISTICS = configs.STATISTICS;
-    this.BISQ = configs.BISQ;
     this.LIGHTNING = configs.LIGHTNING;
     this.LND = configs.LND;
     this.CLIGHTNING = configs.CLIGHTNING;
@@ -334,6 +351,7 @@ class Config implements IConfig {
     this.REPLICATION = configs.REPLICATION;
     this.MEMPOOL_SERVICES = configs.MEMPOOL_SERVICES;
     this.REDIS = configs.REDIS;
+    this.FIAT_PRICE = configs.FIAT_PRICE;
   }
 
   merge = (...objects: object[]): IConfig => {

backend/src/database.ts

@@ -2,8 +2,10 @@ import * as fs from 'fs';
 import path from 'path';
 import config from './config';
 import { createPool, Pool, PoolConnection } from 'mysql2/promise';
+import { LogLevel } from './logger';
 import logger from './logger';
 import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } from 'mysql2/typings/mysql';
+import { execSync } from 'child_process';
 
  class DB {
   constructor() {
@@ -19,7 +21,7 @@ import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } fr
     database: config.DATABASE.DATABASE,
     user: config.DATABASE.USERNAME,
     password: config.DATABASE.PASSWORD,
-    connectionLimit: 10,
+    connectionLimit: config.DATABASE.POOL_SIZE,
     supportBigNumbers: true,
     timezone: '+00:00',
   };
@@ -32,7 +34,7 @@ import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } fr
   }
 
   public async query<T extends RowDataPacket[][] | RowDataPacket[] | OkPacket |
-    OkPacket[] | ResultSetHeader>(query, params?, connection?: PoolConnection): Promise<[T, FieldPacket[]]>
+    OkPacket[] | ResultSetHeader>(query, params?, errorLogLevel: LogLevel | 'silent' = 'debug', connection?: PoolConnection): Promise<[T, FieldPacket[]]>
   {
     this.checkDBFlag();
     let hardTimeout;
@@ -54,19 +56,38 @@ import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } fr
         }).then(result => {
           resolve(result);
         }).catch(error => {
+          if (errorLogLevel !== 'silent') {
+            logger[errorLogLevel](`database query "${query?.sql?.slice(0, 160) || (typeof(query) === 'string' || query instanceof String ? query?.slice(0, 160) : 'unknown query')}" failed!`);
+          }
           reject(error);
         }).finally(() => {
           clearTimeout(timer);
         });
       });
     } else {
-      const pool = await this.getPool();
-      return pool.query(query, params);
+      try {
+        const pool = await this.getPool();
+        return pool.query(query, params);
+      } catch (e) {
+        if (errorLogLevel !== 'silent') {
+          logger[errorLogLevel](`database query "${query?.sql?.slice(0, 160) || (typeof(query) === 'string' || query instanceof String ? query?.slice(0, 160) : 'unknown query')}" failed!`);
+        }
+        throw e;
+      }
+    }
+  }
+
+  private async $rollbackAtomic(connection: PoolConnection): Promise<void> {
+    try {
+      await connection.rollback();
+      await connection.release();
+    } catch (e) {
+      logger.warn('Failed to rollback incomplete db transaction: ' + (e instanceof Error ? e.message : e));
     }
   }
 
   public async $atomicQuery<T extends RowDataPacket[][] | RowDataPacket[] | OkPacket |
-    OkPacket[] | ResultSetHeader>(queries: { query, params }[]): Promise<[T, FieldPacket[]][]>
+    OkPacket[] | ResultSetHeader>(queries: { query, params }[], errorLogLevel: LogLevel | 'silent' = 'debug'): Promise<[T, FieldPacket[]][]>
   {
     const pool = await this.getPool();
     const connection = await pool.getConnection();
@@ -75,7 +96,7 @@ import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } fr
 
       const results: [T, FieldPacket[]][]  = [];
       for (const query of queries) {
-        const result = await this.query(query.query, query.params, connection) as [T, FieldPacket[]];
+        const result = await this.query(query.query, query.params, errorLogLevel, connection) as [T, FieldPacket[]];
         results.push(result);
       }
 
@@ -83,9 +104,8 @@ import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } fr
 
       return results;
     } catch (e) {
-      logger.err('Could not complete db transaction, rolling back: ' + (e instanceof Error ? e.message : e));
-      connection.rollback();
-      connection.release();
+      logger.warn('Could not complete db transaction, rolling back: ' + (e instanceof Error ? e.message : e));
+      this.$rollbackAtomic(connection);
       throw e;
     } finally {
       connection.release();
@@ -105,26 +125,43 @@ import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } fr
 
   public getPidLock(): boolean {
     const filePath = path.join(config.DATABASE.PID_DIR || __dirname, `/mempool-${config.DATABASE.DATABASE}.pid`);
+    this.enforcePidLock(filePath);
+    fs.writeFileSync(filePath, `${process.pid}`);
+    return true;
+  }
+
+  private enforcePidLock(filePath: string): void {
     if (fs.existsSync(filePath)) {
-      const pid = fs.readFileSync(filePath).toString();
-      if (pid !== `${process.pid}`) {
-        const msg = `Already running on PID ${pid} (or pid file '${filePath}' is stale)`;
+      const pid = parseInt(fs.readFileSync(filePath, 'utf-8'));
+      if (pid === process.pid) {
+        logger.warn('PID file already exists for this process');
+        return;
+      }
+
+      let cmd;
+      try {
+        cmd = execSync(`ps -p ${pid} -o args=`);
+      } catch (e) {
+        logger.warn(`Stale PID file at ${filePath}, but no process running on that PID ${pid}`);
+        return;
+      }
+
+      if (cmd && cmd.toString()?.includes('node')) {
+        const msg = `Another mempool nodejs process is already running on PID ${pid}`;
         logger.err(msg);
         throw new Error(msg);
       } else {
-        return true;
+        logger.warn(`Stale PID file at ${filePath}, but the PID ${pid} does not belong to a running mempool instance`);
       }
-    } else {
-      fs.writeFileSync(filePath, `${process.pid}`);
-      return true;
     }
   }
 
   public releasePidLock(): void {
     const filePath = path.join(config.DATABASE.PID_DIR || __dirname, `/mempool-${config.DATABASE.DATABASE}.pid`);
     if (fs.existsSync(filePath)) {
-      const pid = fs.readFileSync(filePath).toString();
-      if (pid === `${process.pid}`) {
+      const pid = parseInt(fs.readFileSync(filePath, 'utf-8'));
+      // only release our own pid file
+      if (pid === process.pid) {
         fs.unlinkSync(filePath);
       }
     }

backend/src/index.ts

@@ -11,8 +11,6 @@ import memPool from './api/mempool';
 import diskCache from './api/disk-cache';
 import statistics from './api/statistics/statistics';
 import websocketHandler from './api/websocket-handler';
-import bisq from './api/bisq/bisq';
-import bisqMarkets from './api/bisq/markets';
 import logger from './logger';
 import backendInfo from './api/backend-info';
 import loadingIndicators from './api/loading-indicators';
@@ -32,7 +30,6 @@ import networkSyncService from './tasks/lightning/network-sync.service';
 import statisticsRoutes from './api/statistics/statistics.routes';
 import pricesRoutes from './api/prices/prices.routes';
 import miningRoutes from './api/mining/mining-routes';
-import bisqRoutes from './api/bisq/bisq.routes';
 import liquidRoutes from './api/liquid/liquid.routes';
 import bitcoinRoutes from './api/bitcoin/bitcoin.routes';
 import fundingTxFetcher from './tasks/lightning/sync-tasks/funding-tx-fetcher';
@@ -43,6 +40,11 @@ import { AxiosError } from 'axios';
 import v8 from 'v8';
 import { formatBytes, getBytesUnit } from './utils/format';
 import redisCache from './api/redis-cache';
+import accelerationApi from './api/services/acceleration';
+import bitcoinCoreRoutes from './api/bitcoin/bitcoin-core.routes';
+import bitcoinSecondClient from './api/bitcoin/bitcoin-second-client';
+import accelerationRoutes from './api/acceleration/acceleration.routes';
+import aboutRoutes from './api/about.routes';
 
 class Server {
   private wss: WebSocket.Server | undefined;
@@ -92,9 +94,15 @@ class Server {
     logger.notice(`Starting Mempool Server${worker ? ' (worker)' : ''}... (${backendInfo.getShortCommitHash()})`);
 
     // Register cleanup listeners for exit events
-    ['exit', 'SIGINT', 'SIGTERM', 'SIGUSR1', 'SIGUSR2', 'uncaughtException', 'unhandledRejection'].forEach(event => {
+    ['exit', 'SIGHUP', 'SIGINT', 'SIGTERM', 'SIGUSR1', 'SIGUSR2'].forEach(event => {
       process.on(event, () => { this.onExit(event); });
     });
+    process.on('uncaughtException', (error) => {
+      this.onUnhandledException('uncaughtException', error);
+    });
+    process.on('unhandledRejection', (reason, promise) => {
+      this.onUnhandledException('unhandledRejection', reason);
+    });
 
     if (config.MEMPOOL.BACKEND === 'esplora') {
       bitcoinApi.startHealthChecks();
@@ -123,7 +131,7 @@ class Server {
       .use(express.text({ type: ['text/plain', 'application/base64'] }))
       ;
 
-    if (config.DATABASE.ENABLED) {
+    if (config.DATABASE.ENABLED && config.FIAT_PRICE.ENABLED) {
       await priceUpdater.$initializeLatestPriceWithDb();
     }
 
@@ -147,14 +155,22 @@ class Server {
     }
 
     if (Common.isLiquid()) {
-      try {
-        icons.loadIcons();
-      } catch (e) {
-        logger.err('Cannot load liquid icons. Ignoring. Reason: ' + (e instanceof Error ? e.message : e));
-      }
+      const refreshIcons = () => {
+        try {
+          icons.loadIcons();
+        } catch (e) {
+          logger.err('Cannot load liquid icons. Ignoring. Reason: ' + (e instanceof Error ? e.message : e));
+        }
+      };
+      // Run once on startup.
+      refreshIcons();
+      // Matches crontab refresh interval for asset db.
+      setInterval(refreshIcons, 3600_000);
     }
 
-    priceUpdater.$run();
+    if (config.FIAT_PRICE.ENABLED) {
+      priceUpdater.$run();
+    }
     await chainTips.updateOrphanedBlocks();
 
     this.setUpHttpApiRoutes();
@@ -165,13 +181,6 @@ class Server {
 
     setInterval(() => { this.healthCheck(); }, 2500);
 
-    if (config.BISQ.ENABLED) {
-      bisq.startBisqService();
-      bisq.setPriceCallbackFunction((price) => websocketHandler.setExtraInitData('bsq-price', price));
-      blocks.setNewBlockCallback(bisq.handleNewBitcoinBlock.bind(bisq));
-      bisqMarkets.startBisqService();
-    }
-
     if (config.LIGHTNING.ENABLED) {
       this.$runLightningBackend();
     }
@@ -199,13 +208,18 @@ class Server {
         }
       }
       const newMempool = await bitcoinApi.$getRawMempool();
+      const minFeeMempool = memPool.limitGBT ? await bitcoinSecondClient.getRawMemPool() : null;
+      const minFeeTip = memPool.limitGBT ? await bitcoinSecondClient.getBlockCount() : -1;
+      const newAccelerations = await accelerationApi.$fetchAccelerations();
       const numHandledBlocks = await blocks.$updateBlocks();
-      const pollRate = config.MEMPOOL.POLL_RATE_MS * (indexer.indexerRunning ? 10 : 1);
+      const pollRate = config.MEMPOOL.POLL_RATE_MS * (indexer.indexerIsRunning() ? 10 : 1);
       if (numHandledBlocks === 0) {
-        await memPool.$updateMempool(newMempool, pollRate);
+        await memPool.$updateMempool(newMempool, newAccelerations, minFeeMempool, minFeeTip, pollRate);
       }
       indexer.$run();
-      priceUpdater.$run();
+      if (config.FIAT_PRICE.ENABLED) {
+        priceUpdater.$run();
+      }
 
       // rerun immediately if we skipped the mempool update, otherwise wait POLL_RATE_MS
       const elapsed = Date.now() - start;
@@ -257,6 +271,7 @@ class Server {
       blocks.setNewBlockCallback(async () => {
         try {
           await elementsParser.$parse();
+          await elementsParser.$updateFederationUtxos();
         } catch (e) {
           logger.warn('Elements parsing error: ' + (e instanceof Error ? e.message : e));
         }
@@ -268,12 +283,15 @@ class Server {
       memPool.setAsyncMempoolChangedCallback(websocketHandler.$handleMempoolChange.bind(websocketHandler));
       blocks.setNewAsyncBlockCallback(websocketHandler.handleNewBlock.bind(websocketHandler));
     }
-    priceUpdater.setRatesChangedCallback(websocketHandler.handleNewConversionRates.bind(websocketHandler));
+    if (config.FIAT_PRICE.ENABLED) {
+      priceUpdater.setRatesChangedCallback(websocketHandler.handleNewConversionRates.bind(websocketHandler));
+    }
     loadingIndicators.setProgressChangedCallback(websocketHandler.handleLoadingChanged.bind(websocketHandler));
   }
   
   setUpHttpApiRoutes(): void {
     bitcoinRoutes.initRoutes(this.app);
+    bitcoinCoreRoutes.initRoutes(this.app);
     pricesRoutes.initRoutes(this.app);
     if (config.STATISTICS.ENABLED && config.DATABASE.ENABLED && config.MEMPOOL.ENABLED) {
       statisticsRoutes.initRoutes(this.app);
@@ -281,9 +299,6 @@ class Server {
     if (Common.indexingEnabled() && config.MEMPOOL.ENABLED) {
       miningRoutes.initRoutes(this.app);
     }
-    if (config.BISQ.ENABLED) {
-      bisqRoutes.initRoutes(this.app);
-    }
     if (Common.isLiquid()) {
       liquidRoutes.initRoutes(this.app);
     }
@@ -292,6 +307,10 @@ class Server {
       nodesRoutes.initRoutes(this.app);
       channelsRoutes.initRoutes(this.app);
     }
+    if (config.MEMPOOL_SERVICES.ACCELERATIONS) {
+      accelerationRoutes.initRoutes(this.app);
+    }
+    aboutRoutes.initRoutes(this.app);
   }
 
   healthCheck(): void {
@@ -314,14 +333,18 @@ class Server {
     }
   }
 
-  onExit(exitEvent): void {
+  onExit(exitEvent, code = 0): void {
+    logger.debug(`onExit for signal: ${exitEvent}`);
     if (config.DATABASE.ENABLED) {
       DB.releasePidLock();
     }
-    process.exit(0);
+    process.exit(code);
+  }
+
+  onUnhandledException(type, error): void {
+    console.error(`${type}:`, error);
+    this.onExit(type, 1);
   }
 }
 
-
-
 ((): Server => new Server())();

backend/src/indexer.ts

@@ -8,6 +8,7 @@ import priceUpdater from './tasks/price-updater';
 import PricesRepository from './repositories/PricesRepository';
 import config from './config';
 import auditReplicator from './replication/AuditReplication';
+import AccelerationRepository from './repositories/AccelerationRepository';
 
 export interface CoreIndex {
   name: string;
@@ -15,11 +16,18 @@ export interface CoreIndex {
   best_block_height: number;
 }
 
+type TaskName = 'blocksPrices' | 'coinStatsIndex';
+
 class Indexer {
-  runIndexer = true;
-  indexerRunning = false;
-  tasksRunning: string[] = [];
-  coreIndexes: CoreIndex[] = [];
+  private runIndexer = true;
+  private indexerRunning = false;
+  private tasksRunning: { [key in TaskName]?: boolean; } = {};
+  private tasksScheduled: { [key in TaskName]?: NodeJS.Timeout; } = {};
+  private coreIndexes: CoreIndex[] = [];
+
+  public indexerIsRunning(): boolean {
+    return this.indexerRunning;
+  }
 
   /**
    * Check which core index is available for indexing
@@ -69,33 +77,69 @@ class Indexer {
     }
   }
 
-  public async runSingleTask(task: 'blocksPrices' | 'coinStatsIndex'): Promise<void> {
-    if (!Common.indexingEnabled()) {
-      return;
-    }
-
-    if (task === 'blocksPrices' && !this.tasksRunning.includes(task) && !['testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) {
-      this.tasksRunning.push(task);
-      const lastestPriceId = await PricesRepository.$getLatestPriceId();
-      if (priceUpdater.historyInserted === false || lastestPriceId === null) {
-        logger.debug(`Blocks prices indexer is waiting for the price updater to complete`, logger.tags.mining);
-        setTimeout(() => {
-          this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask !== task);
-          this.runSingleTask('blocksPrices');
-        }, 10000);
-      } else {
-        logger.debug(`Blocks prices indexer will run now`, logger.tags.mining);
-        await mining.$indexBlockPrices();
-        this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask !== task);
+  /**
+   * schedules a single task to run in `timeout` ms
+   * only one task of each type may be scheduled
+   *
+   * @param {TaskName} task - the type of task
+   * @param {number} timeout - delay in ms
+   * @param {boolean} replace - `true` replaces any already scheduled task (works like a debounce), `false` ignores subsequent requests (works like a throttle)
+   */
+  public scheduleSingleTask(task: TaskName, timeout: number = 10000, replace = false): void {
+    if (this.tasksScheduled[task]) {
+      if (!replace) { //throttle
+        return;
+      } else { // debounce
+        clearTimeout(this.tasksScheduled[task]);
       }
     }
+    this.tasksScheduled[task] = setTimeout(async () => {
+      try {
+        await this.runSingleTask(task);
+      } catch (e) {
+        logger.err(`Unexpected error in scheduled task ${task}: ` + (e instanceof Error ? e.message : e));
+      } finally {
+        clearTimeout(this.tasksScheduled[task]);
+      }
+    }, timeout);
+  }
 
-    if (task === 'coinStatsIndex' && !this.tasksRunning.includes(task)) {
-      this.tasksRunning.push(task);
-      logger.debug(`Indexing coinStatsIndex now`);
-      await mining.$indexCoinStatsIndex();
-      this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask !== task);
+  /**
+   * Runs a single task immediately
+   *
+   * (use `scheduleSingleTask` instead to queue a task to run after some timeout)
+   */
+  public async runSingleTask(task: TaskName): Promise<void> {
+    if (!Common.indexingEnabled() || this.tasksRunning[task]) {
+      return;
     }
+    this.tasksRunning[task] = true;
+
+    switch (task) {
+      case 'blocksPrices': {
+        if (!['testnet', 'signet'].includes(config.MEMPOOL.NETWORK) && config.FIAT_PRICE.ENABLED) {
+          let lastestPriceId;
+          try {
+            lastestPriceId = await PricesRepository.$getLatestPriceId();
+          } catch (e) {
+            logger.debug('failed to fetch latest price id from db: ' + (e instanceof Error ? e.message : e));
+          }          if (priceUpdater.historyInserted === false || lastestPriceId === null) {
+            logger.debug(`Blocks prices indexer is waiting for the price updater to complete`, logger.tags.mining);
+            this.scheduleSingleTask(task, 10000);
+          } else {
+            logger.debug(`Blocks prices indexer will run now`, logger.tags.mining);
+            await mining.$indexBlockPrices();
+          }
+        }
+      } break;
+
+      case 'coinStatsIndex': {
+        logger.debug(`Indexing coinStatsIndex now`);
+        await mining.$indexCoinStatsIndex();
+      } break;
+    }
+
+    this.tasksRunning[task] = false;
   }
 
   public async $run(): Promise<void> {
@@ -105,10 +149,12 @@ class Indexer {
       return;
     }
 
-    try {
-      await priceUpdater.$run();
-    } catch (e) {
-      logger.err(`Running priceUpdater failed. Reason: ` + (e instanceof Error ? e.message : e));
+    if (config.FIAT_PRICE.ENABLED) {
+      try {
+        await priceUpdater.$run();
+      } catch (e) {
+        logger.err(`Running priceUpdater failed. Reason: ` + (e instanceof Error ? e.message : e));
+      }
     }
 
     // Do not attempt to index anything unless Bitcoin Core is fully synced
@@ -142,6 +188,9 @@ class Indexer {
       await blocks.$generateCPFPDatabase();
       await blocks.$generateAuditStats();
       await auditReplicator.$sync();
+      await AccelerationRepository.$indexPastAccelerations();
+      // do not wait for classify blocks to finish
+      blocks.$classifyBlocks();
     } catch (e) {
       this.indexerRunning = false;
       logger.err(`Indexer failed, trying again in 10 seconds. Reason: ` + (e instanceof Error ? e.message : e));

backend/src/logger.ts

@@ -35,6 +35,7 @@ class Logger {
   public tags = {
     mining: 'Mining',
     ln: 'Lightning',
+    goggles: 'Goggles',
   };  
 
   // @ts-ignore
@@ -85,9 +86,6 @@ class Logger {
     if (config.LIGHTNING.ENABLED) {
       return config.MEMPOOL.NETWORK === 'mainnet' ? 'lightning' : `${config.MEMPOOL.NETWORK}-lightning`; 
     }
-    if (config.BISQ.ENABLED) {
-      return 'bisq';
-    }
     if (config.MEMPOOL.NETWORK && config.MEMPOOL.NETWORK !== 'mainnet') {
       return config.MEMPOOL.NETWORK;
     }
@@ -157,4 +155,6 @@ class Logger {
   }
 }
 
+export type LogLevel = 'emerg' | 'alert' | 'crit' | 'err' | 'warn' | 'notice' | 'info' | 'debug';
+
 export default new Logger();

backend/src/mempool.interfaces.ts

@@ -37,6 +37,7 @@ export interface BlockAudit {
   sigopTxs: string[],
   fullrbfTxs: string[],
   addedTxs: string[],
+  prioritizedTxs: string[],
   acceleratedTxs: string[],
   matchRate: number,
   expectedFees?: number,
@@ -61,13 +62,13 @@ export interface MempoolBlock {
 
 export interface MempoolBlockWithTransactions extends MempoolBlock {
   transactionIds: string[];
-  transactions: TransactionStripped[];
+  transactions: TransactionClassified[];
 }
 
 export interface MempoolBlockDelta {
-  added: TransactionStripped[];
+  added: TransactionCompressed[];
   removed: string[];
-  changed: { txid: string, rate: number | undefined }[];
+  changed: MempoolDeltaChange[];
 }
 
 interface VinStrippedToScriptsig {
@@ -94,7 +95,9 @@ export interface TransactionExtended extends IEsploraApi.Transaction {
     vsize: number,
   };
   acceleration?: boolean;
+  replacement?: boolean;
   uid?: number;
+  flags?: number;
 }
 
 export interface MempoolTransactionExtended extends TransactionExtended {
@@ -105,6 +108,7 @@ export interface MempoolTransactionExtended extends TransactionExtended {
   inputs?: number[];
   lastBoosted?: number;
   cpfpDirty?: boolean;
+  cpfpUpdated?: number;
 }
 
 export interface AuditTransaction {
@@ -141,6 +145,12 @@ export interface CompactThreadTransaction {
   dirty?: boolean;
 }
 
+export interface GbtCandidates {
+  txs: { [txid: string ]: boolean },
+  added: MempoolTransactionExtended[];
+  removed: MempoolTransactionExtended[];
+}
+
 export interface ThreadTransaction {
   txid: string;
   fee: number;
@@ -179,6 +189,9 @@ export interface CpfpInfo {
   bestDescendant?: BestDescendant | null;
   descendants?: Ancestor[];
   effectiveFeePerVsize?: number;
+  sigops?: number;
+  adjustedVsize?: number,
+  acceleration?: boolean,
 }
 
 export interface TransactionStripped {
@@ -188,8 +201,56 @@ export interface TransactionStripped {
   value: number;
   acc?: boolean;
   rate?: number; // effective fee rate
+  time?: number;
 }
 
+export interface TransactionClassified extends TransactionStripped {
+  flags: number;
+}
+
+// [txid, fee, vsize, value, rate, flags, acceleration?]
+export type TransactionCompressed = [string, number, number, number, number, number, number, 1?];
+// [txid, rate, flags, acceleration?]
+export type MempoolDeltaChange = [string, number, number, (1|0)];
+
+// binary flags for transaction classification
+export const TransactionFlags = {
+  // features
+  rbf:                                                         0b00000001n,
+  no_rbf:                                                      0b00000010n,
+  v1:                                                          0b00000100n,
+  v2:                                                          0b00001000n,
+  v3:                                                          0b00010000n,
+  nonstandard:                                                 0b00100000n,
+  // address types
+  p2pk:                                               0b00000001_00000000n,
+  p2ms:                                               0b00000010_00000000n,
+  p2pkh:                                              0b00000100_00000000n,
+  p2sh:                                               0b00001000_00000000n,
+  p2wpkh:                                             0b00010000_00000000n,
+  p2wsh:                                              0b00100000_00000000n,
+  p2tr:                                               0b01000000_00000000n,
+  // behavior
+  cpfp_parent:                               0b00000001_00000000_00000000n,
+  cpfp_child:                                0b00000010_00000000_00000000n,
+  replacement:                               0b00000100_00000000_00000000n,
+  // data
+  op_return:                        0b00000001_00000000_00000000_00000000n,
+  fake_pubkey:                      0b00000010_00000000_00000000_00000000n,
+  inscription:                      0b00000100_00000000_00000000_00000000n,
+  fake_scripthash:                  0b00001000_00000000_00000000_00000000n,
+  // heuristics
+  coinjoin:                0b00000001_00000000_00000000_00000000_00000000n,
+  consolidation:           0b00000010_00000000_00000000_00000000_00000000n,
+  batch_payout:            0b00000100_00000000_00000000_00000000_00000000n,
+  // sighash
+  sighash_all:    0b00000001_00000000_00000000_00000000_00000000_00000000n,
+  sighash_none:   0b00000010_00000000_00000000_00000000_00000000_00000000n,
+  sighash_single: 0b00000100_00000000_00000000_00000000_00000000_00000000n,
+  sighash_default:0b00001000_00000000_00000000_00000000_00000000_00000000n,
+  sighash_acp:    0b00010000_00000000_00000000_00000000_00000000_00000000n,
+};
+
 export interface BlockExtension {
   totalFees: number;
   medianFee: number; // median fee rate
@@ -239,7 +300,8 @@ export interface BlockExtended extends IEsploraApi.Block {
 
 export interface BlockSummary {
   id: string;
-  transactions: TransactionStripped[];
+  transactions: TransactionClassified[];
+  version?: number;
 }
 
 export interface AuditSummary extends BlockAudit {
@@ -247,8 +309,8 @@ export interface AuditSummary extends BlockAudit {
   size?: number,
   weight?: number,
   tx_count?: number,
-  transactions: TransactionStripped[];
-  template?: TransactionStripped[];
+  transactions: TransactionClassified[];
+  template?: TransactionClassified[];
 }
 
 export interface BlockPrice {
@@ -351,13 +413,28 @@ export interface OptimizedStatistic {
   vsizes: number[];
 }
 
+export interface TxTrackingInfo {
+  replacedBy?: string,
+  position?: { block: number, vsize: number, accelerated?: boolean },
+  cpfp?: {
+    ancestors?: Ancestor[],
+    bestDescendant?: Ancestor | null,
+    descendants?: Ancestor[] | null,
+    effectiveFeePerVsize?: number | null,
+    sigops: number,
+    adjustedVsize: number,
+  },
+  utxoSpent?: { [vout: number]: { vin: number, txid: string } },
+  accelerated?: boolean,
+  confirmed?: boolean
+}
+
 export interface WebsocketResponse {
   action: string;
   data: string[];
   'track-tx': string;
   'track-address': string;
   'watch-mempool': boolean;
-  'track-bisq-market': string;
 }
 
 export interface VbytesPerSecond {
@@ -379,6 +456,7 @@ export interface IBackendInfo {
   gitCommit: string;
   version: string;
   lightning: boolean;
+  backend: 'esplora' | 'electrum' | 'none';
 }
 
 export interface IDifficultyAdjustment {

backend/src/replication/AuditReplication.ts

@@ -105,7 +105,8 @@ class AuditReplication {
       template: {
         id: blockHash,
         transactions: auditSummary.template || []
-      }
+      },
+      version: 1,
     });
     await blocksAuditsRepository.$saveAudit({
       hash: blockHash,
@@ -113,6 +114,7 @@ class AuditReplication {
       time: auditSummary.timestamp || auditSummary.time,
       missingTxs: auditSummary.missingTxs || [],
       addedTxs: auditSummary.addedTxs || [],
+      prioritizedTxs: auditSummary.prioritizedTxs || [],
       freshTxs: auditSummary.freshTxs || [],
       sigopTxs: auditSummary.sigopTxs || [],
       fullrbfTxs: auditSummary.fullrbfTxs || [],

backend/src/repositories/AccelerationRepository.ts

@@ -0,0 +1,322 @@
+import { AccelerationInfo, makeBlockTemplate } from '../api/acceleration/acceleration';
+import { RowDataPacket } from 'mysql2';
+import DB from '../database';
+import logger from '../logger';
+import { IEsploraApi } from '../api/bitcoin/esplora-api.interface';
+import { Common } from '../api/common';
+import config from '../config';
+import blocks from '../api/blocks';
+import accelerationApi, { Acceleration } from '../api/services/acceleration';
+import accelerationCosts from '../api/acceleration/acceleration';
+import bitcoinApi from '../api/bitcoin/bitcoin-api-factory';
+import transactionUtils from '../api/transaction-utils';
+import { BlockExtended, MempoolTransactionExtended } from '../mempool.interfaces';
+
+export interface PublicAcceleration {
+  txid: string,
+  height: number,
+  pool: {
+    id: number,
+    slug: string,
+    name: string,
+  },
+  effective_vsize: number,
+  effective_fee: number,
+  boost_rate: number,
+  boost_cost: number,
+}
+
+class AccelerationRepository {
+  private bidBoostV2Activated = 831580;
+
+  public async $saveAcceleration(acceleration: AccelerationInfo, block: IEsploraApi.Block, pool_id: number): Promise<void> {
+    try {
+      await DB.query(`
+        INSERT INTO accelerations(txid, added, height, pool, effective_vsize, effective_fee, boost_rate, boost_cost)
+        VALUE (?, FROM_UNIXTIME(?), ?, ?, ?, ?, ?, ?)
+        ON DUPLICATE KEY UPDATE
+          height = ?
+      `, [
+        acceleration.txSummary.txid,
+        block.timestamp,
+        block.height,
+        pool_id,
+        acceleration.txSummary.effectiveVsize,
+        acceleration.txSummary.effectiveFee,
+        acceleration.targetFeeRate,
+        acceleration.cost,
+        block.height,
+      ]);
+    } catch (e: any) {
+      logger.err(`Cannot save acceleration (${acceleration.txSummary.txid}) into db. Reason: ` + (e instanceof Error ? e.message : e));
+      // We don't throw, not a critical issue if we miss some accelerations
+    }
+  }
+
+  public async $getAccelerationInfo(poolSlug: string | null = null, height: number | null = null, interval: string | null = null): Promise<PublicAcceleration[]> {
+    if (!interval || !['24h', '3d', '1w', '1m'].includes(interval)) {
+      interval = '1m';
+    }
+    interval = Common.getSqlInterval(interval);
+
+    if (!config.MEMPOOL_SERVICES.ACCELERATIONS || (interval == null && poolSlug == null && height == null)) {
+      return [];
+    }
+
+    let query = `
+      SELECT * FROM accelerations
+      JOIN pools on pools.unique_id = accelerations.pool
+    `;
+    let params: any[] = [];
+    let hasFilter = false;
+
+    if (interval && height === null) {
+      query += ` WHERE accelerations.added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW() `;
+      hasFilter = true;
+    }
+
+    if (height != null) {
+      if (hasFilter) {
+        query += ` AND accelerations.height = ? `;
+      } else {
+        query += ` WHERE accelerations.height = ? `;
+      }
+      params.push(height);
+    } else if (poolSlug != null) {
+      if (hasFilter) {
+        query += ` AND pools.slug = ? `;
+      } else {
+        query += ` WHERE pools.slug = ? `;
+      }
+      params.push(poolSlug);
+    }
+
+    query += ` ORDER BY accelerations.added DESC `;
+
+    try {
+      const [rows] = await DB.query(query, params) as RowDataPacket[][];
+      if (rows?.length) {
+        return rows.map(row => ({
+          txid: row.txid,
+          height: row.height,
+          pool: {
+            id: row.id,
+            slug: row.slug,
+            name: row.name,
+          },
+          effective_vsize: row.effective_vsize,
+          effective_fee: row.effective_fee,
+          boost_rate: row.boost_rate,
+          boost_cost: row.boost_cost,
+        }));
+      } else {
+        return [];
+      }
+    } catch (e) {
+      logger.err(`Cannot query acceleration info. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getAccelerationTotals(poolSlug: string | null = null, interval: string | null = null): Promise<{ cost: number, count: number }> {
+    interval = Common.getSqlInterval(interval);
+
+    if (!config.MEMPOOL_SERVICES.ACCELERATIONS) {
+      return { cost: 0, count: 0 };
+    }
+
+    let query = `
+      SELECT SUM(boost_cost) as total_cost, COUNT(txid) as count FROM accelerations
+      JOIN pools on pools.unique_id = accelerations.pool
+    `;
+    let params: any[] = [];
+    let hasFilter = false;
+
+    if (interval) {
+      query += ` WHERE accelerations.added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW() `;
+      hasFilter = true;
+    }
+    if (poolSlug != null) {
+      if (hasFilter) {
+        query += ` AND pools.slug = ? `;
+      } else {
+        query += ` WHERE pools.slug = ? `;
+      }
+      params.push(poolSlug);
+    }
+
+    try {
+      const [rows] = await DB.query(query, params) as RowDataPacket[][];
+      return {
+        cost: rows[0]?.total_cost || 0,
+        count: rows[0]?.count || 0,
+      };
+    } catch (e) {
+      logger.err(`Cannot query acceleration totals. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getLastSyncedHeight(): Promise<number> {
+    try {
+      const [rows] = await DB.query(`
+        SELECT * FROM state
+        WHERE name = 'last_acceleration_block'
+      `);
+      if (rows?.['length']) {
+        return rows[0].number;
+      }
+    } catch (e: any) {
+      logger.err(`Cannot find last acceleration sync height. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+    return 0;
+  }
+
+  private async $setLastSyncedHeight(height: number): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE state
+        SET number = ?
+        WHERE name = 'last_acceleration_block'
+      `, [height]);
+    } catch (e: any) {
+      logger.err(`Cannot update last acceleration sync height. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  public async $indexAccelerationsForBlock(block: BlockExtended, accelerations: Acceleration[], transactions: MempoolTransactionExtended[]): Promise<void> {
+    const blockTxs: { [txid: string]: MempoolTransactionExtended } = {};
+    for (const tx of transactions) {
+      blockTxs[tx.txid] = tx;
+    }
+    const successfulAccelerations = accelerations.filter(acc => acc.pools.includes(block.extras.pool.id));
+    let boostRate: number | null = null;
+    for (const acc of successfulAccelerations) {
+      if (boostRate === null) {
+        boostRate = accelerationCosts.calculateBoostRate(
+          accelerations.map(acc => ({ txid: acc.txid, max_bid: acc.feeDelta })),
+          transactions
+        );
+      }
+      if (blockTxs[acc.txid]) {
+        const tx = blockTxs[acc.txid];
+        const accelerationInfo = accelerationCosts.getAccelerationInfo(tx, boostRate, transactions);
+        accelerationInfo.cost = Math.max(0, Math.min(acc.feeDelta, accelerationInfo.cost));
+        this.$saveAcceleration(accelerationInfo, block, block.extras.pool.id);
+      }
+    }
+    const lastSyncedHeight = await this.$getLastSyncedHeight();
+    // if we've missed any blocks, let the indexer catch up from the last synced height on the next run
+    if (block.height === lastSyncedHeight + 1) {
+      await this.$setLastSyncedHeight(block.height);
+    }
+  }
+
+  /**
+   * [INDEXING] Backfill missing acceleration data
+   */
+  async $indexPastAccelerations(): Promise<void> {
+    if (config.MEMPOOL.NETWORK !== 'mainnet' || !config.MEMPOOL_SERVICES.ACCELERATIONS) {
+      // acceleration history disabled
+      return;
+    }
+    const lastSyncedHeight = await this.$getLastSyncedHeight();
+    const currentHeight = blocks.getCurrentBlockHeight();
+    if (currentHeight <= lastSyncedHeight) {
+      // already in sync
+      return;
+    }
+
+    logger.debug(`Fetching accelerations between block ${lastSyncedHeight} and ${currentHeight}`);
+
+    // Fetch accelerations from mempool.space since the last synced block;
+    const accelerationsByBlock = {};
+    const blockHashes = {};
+    let done = false;
+    let page = 1;
+    let count = 0;
+    try {
+      while (!done) {
+        const accelerations = await accelerationApi.$fetchAccelerationHistory(page);
+        page++;
+        if (!accelerations?.length) {
+          done = true;
+          break;
+        }
+        for (const acc of accelerations) {
+          if (acc.status !== 'completed_provisional' && acc.status !== 'completed') {
+            continue;
+          }
+          if (!lastSyncedHeight || acc.blockHeight > lastSyncedHeight) {
+            if (!accelerationsByBlock[acc.blockHeight]) {
+              accelerationsByBlock[acc.blockHeight] = [];
+              blockHashes[acc.blockHeight] = acc.blockHash;
+            }
+            accelerationsByBlock[acc.blockHeight].push(acc);
+            count++;
+          } else {
+            done = true;
+          }
+        }
+      }
+    } catch (e) {
+      logger.err(`Failed to fetch full acceleration history. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+
+    logger.debug(`Indexing ${count} accelerations between block ${lastSyncedHeight} and ${currentHeight}`);
+
+    // process accelerated blocks in order
+    const heights = Object.keys(accelerationsByBlock).map(key => parseInt(key)).sort((a,b) => a - b);
+    for (const height of heights) {
+      const accelerations = accelerationsByBlock[height];
+      try {
+        const block = await blocks.$getBlock(blockHashes[height]) as BlockExtended;
+        const transactions = (await bitcoinApi.$getTxsForBlock(blockHashes[height])).map(tx => transactionUtils.extendMempoolTransaction(tx));
+
+        const blockTxs = {};
+        for (const tx of transactions) {
+          blockTxs[tx.txid] = tx;
+        }
+
+        let boostRate = 0;
+        // use Bid Boost V2 if active
+        if (height > this.bidBoostV2Activated) {
+          boostRate = accelerationCosts.calculateBoostRate(
+            accelerations.map(acc => ({ txid: acc.txid, max_bid: acc.feeDelta })),
+            transactions
+          );
+        } else {
+          // default to Bid Boost V1 (median block fee rate)
+          const template = makeBlockTemplate(
+            transactions,
+            accelerations.map(acc => ({ txid: acc.txid, max_bid: acc.feeDelta })),
+            1,
+            Infinity,
+            Infinity
+          );
+          const feeStats = Common.calcEffectiveFeeStatistics(template);
+          boostRate = feeStats.medianFee;
+        }
+        for (const acc of accelerations) {
+          if (blockTxs[acc.txid]) {
+            const tx = blockTxs[acc.txid];
+            const accelerationInfo = accelerationCosts.getAccelerationInfo(tx, boostRate, transactions);
+            accelerationInfo.cost = Math.max(0, Math.min(acc.feeDelta, accelerationInfo.cost));
+            await this.$saveAcceleration(accelerationInfo, block, block.extras.pool.id);
+          }
+        }
+        await this.$setLastSyncedHeight(height);
+      } catch (e) {
+        logger.err(`Failed to process accelerations for block ${height}. Reason: ` + (e instanceof Error ? e.message : e));
+        return;
+      }
+      logger.debug(`Indexed ${accelerations.length} accelerations in block  ${height}`);
+    }
+
+    await this.$setLastSyncedHeight(currentHeight);
+
+    logger.debug(`Indexing accelerations completed`);
+  }
+}
+
+export default new AccelerationRepository();

backend/src/repositories/BlocksAuditsRepository.ts

@@ -6,9 +6,9 @@ import { BlockAudit, AuditScore } from '../mempool.interfaces';
 class BlocksAuditRepositories {
   public async $saveAudit(audit: BlockAudit): Promise<void> {
     try {
-      await DB.query(`INSERT INTO blocks_audits(time, height, hash, missing_txs, added_txs, fresh_txs, sigop_txs, fullrbf_txs, accelerated_txs, match_rate, expected_fees, expected_weight)
-        VALUE (FROM_UNIXTIME(?), ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`, [audit.time, audit.height, audit.hash, JSON.stringify(audit.missingTxs),
-          JSON.stringify(audit.addedTxs), JSON.stringify(audit.freshTxs), JSON.stringify(audit.sigopTxs), JSON.stringify(audit.fullrbfTxs), JSON.stringify(audit.acceleratedTxs), audit.matchRate, audit.expectedFees, audit.expectedWeight]);
+      await DB.query(`INSERT INTO blocks_audits(time, height, hash, missing_txs, added_txs, prioritized_txs, fresh_txs, sigop_txs, fullrbf_txs, accelerated_txs, match_rate, expected_fees, expected_weight)
+        VALUE (FROM_UNIXTIME(?), ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`, [audit.time, audit.height, audit.hash, JSON.stringify(audit.missingTxs),
+          JSON.stringify(audit.addedTxs), JSON.stringify(audit.prioritizedTxs), JSON.stringify(audit.freshTxs), JSON.stringify(audit.sigopTxs), JSON.stringify(audit.fullrbfTxs), JSON.stringify(audit.acceleratedTxs), audit.matchRate, audit.expectedFees, audit.expectedWeight]);
     } catch (e: any) {
       if (e.errno === 1062) { // ER_DUP_ENTRY - This scenario is possible upon node backend restart
         logger.debug(`Cannot save block audit for block ${audit.hash} because it has already been indexed, ignoring`);
@@ -59,13 +59,14 @@ class BlocksAuditRepositories {
     }
   }
 
-  public async $getBlockAudit(hash: string): Promise<any> {
+  public async $getBlockAudit(hash: string): Promise<BlockAudit | null> {
     try {
       const [rows]: any[] = await DB.query(
         `SELECT blocks_audits.height, blocks_audits.hash as id, UNIX_TIMESTAMP(blocks_audits.time) as timestamp,
         template,
         missing_txs as missingTxs,
         added_txs as addedTxs,
+        prioritized_txs as prioritizedTxs,
         fresh_txs as freshTxs,
         sigop_txs as sigopTxs,
         fullrbf_txs as fullrbfTxs,
@@ -75,12 +76,13 @@ class BlocksAuditRepositories {
         expected_weight as expectedWeight
         FROM blocks_audits
         JOIN blocks_templates ON blocks_templates.id = blocks_audits.hash
-        WHERE blocks_audits.hash = "${hash}"
-      `);
+        WHERE blocks_audits.hash = ?
+      `, [hash]);
       
       if (rows.length) {
         rows[0].missingTxs = JSON.parse(rows[0].missingTxs);
         rows[0].addedTxs = JSON.parse(rows[0].addedTxs);
+        rows[0].prioritizedTxs = JSON.parse(rows[0].prioritizedTxs);
         rows[0].freshTxs = JSON.parse(rows[0].freshTxs);
         rows[0].sigopTxs = JSON.parse(rows[0].sigopTxs);
         rows[0].fullrbfTxs = JSON.parse(rows[0].fullrbfTxs);
@@ -101,8 +103,8 @@ class BlocksAuditRepositories {
       const [rows]: any[] = await DB.query(
         `SELECT hash, match_rate as matchRate, expected_fees as expectedFees, expected_weight as expectedWeight
         FROM blocks_audits
-        WHERE blocks_audits.hash = "${hash}"
-      `);
+        WHERE blocks_audits.hash = ?
+      `, [hash]);
       return rows[0];
     } catch (e: any) {
       logger.err(`Cannot fetch block audit from db. Reason: ` + (e instanceof Error ? e.message : e));

backend/src/repositories/BlocksRepository.ts

@@ -5,7 +5,7 @@ import logger from '../logger';
 import { Common } from '../api/common';
 import PoolsRepository from './PoolsRepository';
 import HashratesRepository from './HashratesRepository';
-import { escape } from 'mysql2';
+import { RowDataPacket, escape } from 'mysql2';
 import BlocksSummariesRepository from './BlocksSummariesRepository';
 import DifficultyAdjustmentsRepository from './DifficultyAdjustmentsRepository';
 import bitcoinClient from '../api/bitcoin/bitcoin-client';
@@ -478,7 +478,7 @@ class BlocksRepository {
   public async $getBlocksByPool(slug: string, startHeight?: number): Promise<BlockExtended[]> {
     const pool = await PoolsRepository.$getPool(slug);
     if (!pool) {
-      throw new Error('This mining pool does not exist ' + escape(slug));
+      throw new Error('This mining pool does not exist');
     }
 
     const params: any[] = [];
@@ -541,7 +541,7 @@ class BlocksRepository {
    */
   public async $getBlocksDifficulty(): Promise<object[]> {
     try {
-      const [rows]: any[] = await DB.query(`SELECT UNIX_TIMESTAMP(blockTimestamp) as time, height, difficulty, bits FROM blocks`);
+      const [rows]: any[] = await DB.query(`SELECT UNIX_TIMESTAMP(blockTimestamp) as time, height, difficulty, bits FROM blocks ORDER BY height ASC`);
       return rows;
     } catch (e) {
       logger.err('Cannot get blocks difficulty list from the db. Reason: ' + (e instanceof Error ? e.message : e));
@@ -802,10 +802,10 @@ class BlocksRepository {
   /**
    * Get a list of blocks that have been indexed
    */
-  public async $getIndexedBlocks(): Promise<any[]> {
+  public async $getIndexedBlocks(): Promise<{ height: number, hash: string }[]> {
     try {
-      const [rows]: any = await DB.query(`SELECT height, hash FROM blocks ORDER BY height DESC`);
-      return rows;
+      const [rows] = await DB.query(`SELECT height, hash FROM blocks ORDER BY height DESC`) as RowDataPacket[][];
+      return rows as { height: number, hash: string }[];
     } catch (e) {
       logger.err('Cannot generate block size and weight history. Reason: ' + (e instanceof Error ? e.message : e));
       throw e;
@@ -815,7 +815,7 @@ class BlocksRepository {
   /**
    * Get a list of blocks that have not had CPFP data indexed
    */
-   public async $getCPFPUnindexedBlocks(): Promise<any[]> {
+   public async $getCPFPUnindexedBlocks(): Promise<number[]> {
     try {
       const blockchainInfo = await bitcoinClient.getBlockchainInfo();
       const currentBlockHeight = blockchainInfo.blocks;
@@ -825,13 +825,13 @@ class BlocksRepository {
       }
       const minHeight = Math.max(0, currentBlockHeight - indexingBlockAmount + 1);
 
-      const [rows]: any[] = await DB.query(`
+      const [rows] = await DB.query(`
         SELECT height
         FROM compact_cpfp_clusters
         WHERE height <= ? AND height >= ?
         GROUP BY height
         ORDER BY height DESC;
-      `, [currentBlockHeight, minHeight]);
+      `, [currentBlockHeight, minHeight]) as RowDataPacket[][];
 
       const indexedHeights = {};
       rows.forEach((row) => { indexedHeights[row.height] = true; });
@@ -1040,16 +1040,18 @@ class BlocksRepository {
       if (extras.feePercentiles === null) {
 
         let summary;
+        let summaryVersion = 0;
         if (config.MEMPOOL.BACKEND === 'esplora') {
           const txs = (await bitcoinApi.$getTxsForBlock(dbBlk.id)).map(tx => transactionUtils.extendTransaction(tx));
           summary = blocks.summarizeBlockTransactions(dbBlk.id, txs);
+          summaryVersion = 1;
         } else {
           // Call Core RPC
           const block = await bitcoinClient.getBlock(dbBlk.id, 2);
           summary = blocks.summarizeBlock(block);
         }
 
-        await BlocksSummariesRepository.$saveTransactions(dbBlk.height, dbBlk.id, summary.transactions);
+        await BlocksSummariesRepository.$saveTransactions(dbBlk.height, dbBlk.id, summary.transactions, summaryVersion);
         extras.feePercentiles = await BlocksSummariesRepository.$getFeePercentilesByBlockId(dbBlk.id);
       }
       if (extras.feePercentiles !== null) {

backend/src/repositories/BlocksSummariesRepository.ts

@@ -1,6 +1,7 @@
+import { RowDataPacket } from 'mysql2';
 import DB from '../database';
 import logger from '../logger';
-import { BlockSummary, TransactionStripped } from '../mempool.interfaces';
+import { BlockSummary, TransactionClassified } from '../mempool.interfaces';
 
 class BlocksSummariesRepository {
   public async $getByBlockId(id: string): Promise<BlockSummary | undefined> {
@@ -17,30 +18,31 @@ class BlocksSummariesRepository {
     return undefined;
   }
 
-  public async $saveTransactions(blockHeight: number, blockId: string, transactions: TransactionStripped[]): Promise<void> {
+  public async $saveTransactions(blockHeight: number, blockId: string, transactions: TransactionClassified[], version: number): Promise<void> {
     try {
       const transactionsStr = JSON.stringify(transactions);
       await DB.query(`
         INSERT INTO blocks_summaries
-        SET height = ?, transactions = ?, id = ?
-        ON DUPLICATE KEY UPDATE transactions = ?`,
-        [blockHeight, transactionsStr, blockId, transactionsStr]);
+        SET height = ?, transactions = ?, id = ?, version = ?
+        ON DUPLICATE KEY UPDATE transactions = ?, version = ?`,
+        [blockHeight, transactionsStr, blockId, version, transactionsStr, version]);
     } catch (e: any) {
       logger.debug(`Cannot save block summary transactions for ${blockId}. Reason: ${e instanceof Error ? e.message : e}`);
       throw e;
     }
   }
 
-  public async $saveTemplate(params: { height: number, template: BlockSummary}) {
+  public async $saveTemplate(params: { height: number, template: BlockSummary, version: number}): Promise<void> {
     const blockId = params.template?.id;
     try {
       const transactions = JSON.stringify(params.template?.transactions || []);
       await DB.query(`
-        INSERT INTO blocks_templates (id, template)
-        VALUE (?, ?)
+        INSERT INTO blocks_templates (id, template, version)
+        VALUE (?, ?, ?)
         ON DUPLICATE KEY UPDATE
-          template = ?
-      `, [blockId, transactions, transactions]);
+          template = ?,
+          version = ?
+      `, [blockId, transactions, params.version, transactions, params.version]);
     } catch (e: any) {
       if (e.errno === 1062) { // ER_DUP_ENTRY - This scenario is possible upon node backend restart
         logger.debug(`Cannot save block template for ${blockId} because it has already been indexed, ignoring`);
@@ -57,6 +59,7 @@ class BlocksSummariesRepository {
         return {
           id: templates[0].id,
           transactions: JSON.parse(templates[0].template),
+          version: templates[0].version,
         };
       }
     } catch (e) {
@@ -67,7 +70,7 @@ class BlocksSummariesRepository {
 
   public async $getIndexedSummariesId(): Promise<string[]> {
     try {
-      const [rows]: any[] = await DB.query(`SELECT id from blocks_summaries`);
+      const [rows] = await DB.query(`SELECT id from blocks_summaries`) as RowDataPacket[][];
       return rows.map(row => row.id);
     } catch (e) {
       logger.err(`Cannot get block summaries id list. Reason: ` + (e instanceof Error ? e.message : e));
@@ -76,6 +79,41 @@ class BlocksSummariesRepository {
     return [];
   }
 
+  public async $getSummariesWithVersion(version: number): Promise<{ height: number, id: string }[]> {
+    try {
+      const [rows]: any[] = await DB.query(`
+        SELECT
+          height,
+          id
+        FROM blocks_summaries
+        WHERE version = ?
+        ORDER BY height DESC;`, [version]);
+      return rows;
+    } catch (e) {
+      logger.err(`Cannot get block summaries with version. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+
+    return [];
+  }
+
+  public async $getTemplatesWithVersion(version: number): Promise<{ height: number, id: string }[]> {
+    try {
+      const [rows]: any[] = await DB.query(`
+        SELECT
+          blocks_summaries.height as height,
+          blocks_templates.id as id
+        FROM blocks_templates
+        JOIN blocks_summaries ON blocks_templates.id = blocks_summaries.id
+        WHERE blocks_templates.version = ?
+        ORDER BY height DESC;`, [version]);
+      return rows;
+    } catch (e) {
+      logger.err(`Cannot get block summaries with version. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+
+    return [];
+  }
+
   /**
    * Get the fee percentiles if the block has already been indexed, [] otherwise
    * 

backend/src/repositories/HashratesRepository.ts

@@ -139,7 +139,7 @@ class HashratesRepository {
   public async $getPoolWeeklyHashrate(slug: string): Promise<any[]> {
     const pool = await PoolsRepository.$getPool(slug);
     if (!pool) {
-      throw new Error('This mining pool does not exist ' + escape(slug));
+      throw new Error('This mining pool does not exist');
     }
 
     // Find hashrate boundaries

backend/src/repositories/NodesSocketsRepository.ts

@@ -14,7 +14,7 @@ class NodesSocketsRepository {
       await DB.query(`
         INSERT INTO nodes_sockets(public_key, socket, type)
         VALUE (?, ?, ?)
-      `, [socket.publicKey, socket.addr, socket.network]);
+      `, [socket.publicKey, socket.addr, socket.network], 'silent');
     } catch (e: any) {
       if (e.errno !== 1062) { // ER_DUP_ENTRY - Not an issue, just ignore this
         logger.err(`Cannot save node socket (${[socket.publicKey, socket.addr, socket.network]}) into db. Reason: ` + (e instanceof Error ? e.message : e));

backend/src/repositories/PricesRepository.ts

@@ -1,5 +1,6 @@
 import DB from '../database';
 import logger from '../logger';
+import config from '../config';
 import priceUpdater from '../tasks/price-updater';
 
 export interface ApiPrice {
@@ -11,17 +12,81 @@ export interface ApiPrice {
   CHF: number,
   AUD: number,
   JPY: number,
+  BGN: number,
+  BRL: number,
+  CNY: number,
+  CZK: number,
+  DKK: number,
+  HKD: number,
+  HRK: number,
+  HUF: number,
+  IDR: number,
+  ILS: number,
+  INR: number,
+  ISK: number,
+  KRW: number,
+  MXN: number,
+  MYR: number,
+  NOK: number,
+  NZD: number,
+  PHP: number,
+  PLN: number,
+  RON: number,
+  RUB: number,
+  SEK: number,
+  SGD: number,
+  THB: number,
+  TRY: number,
+  ZAR: number,
 }
-const ApiPriceFields = `
-  UNIX_TIMESTAMP(time) as time,
-  USD,
-  EUR,
-  GBP,
-  CAD,
-  CHF,
-  AUD,
-  JPY
-`;
+
+const ApiPriceFields = config.FIAT_PRICE.API_KEY ?
+    `
+      UNIX_TIMESTAMP(time) as time,
+      USD,
+      EUR,
+      GBP,
+      CAD,
+      CHF,
+      AUD,
+      JPY,
+      BGN,
+      BRL,
+      CNY,
+      CZK,
+      DKK,
+      HKD,
+      HRK,
+      HUF,
+      IDR,
+      ILS,
+      INR,
+      ISK,
+      KRW,
+      MXN,
+      MYR,
+      NOK,
+      NZD,
+      PHP,
+      PLN,
+      RON,
+      RUB,
+      SEK,
+      SGD,
+      THB,
+      TRY,
+      ZAR
+    `:
+    `
+      UNIX_TIMESTAMP(time) as time,
+      USD,
+      EUR,
+      GBP,
+      CAD,
+      CHF,
+      AUD,
+      JPY
+    `;
 
 export interface ExchangeRates {
   USDEUR: number,
@@ -30,6 +95,32 @@ export interface ExchangeRates {
   USDCHF: number,
   USDAUD: number,
   USDJPY: number,
+  USDBGN?: number,
+  USDBRL?: number,
+  USDCNY?: number,
+  USDCZK?: number,
+  USDDKK?: number,
+  USDHKD?: number,
+  USDHRK?: number,
+  USDHUF?: number,
+  USDIDR?: number,
+  USDILS?: number,
+  USDINR?: number,
+  USDISK?: number,
+  USDKRW?: number,
+  USDMXN?: number,
+  USDMYR?: number,
+  USDNOK?: number,
+  USDNZD?: number,
+  USDPHP?: number,
+  USDPLN?: number,
+  USDRON?: number,
+  USDRUB?: number,
+  USDSEK?: number,
+  USDSGD?: number,
+  USDTHB?: number,
+  USDTRY?: number,
+  USDZAR?: number,
 }
 
 export interface Conversion {
@@ -45,6 +136,32 @@ export const MAX_PRICES = {
   CHF: 100000000,
   AUD: 100000000,
   JPY: 10000000000,
+  BGN: 1000000000,
+  BRL: 1000000000,
+  CNY: 1000000000,
+  CZK: 10000000000,
+  DKK: 1000000000,
+  HKD: 1000000000,
+  HRK: 1000000000,
+  HUF: 10000000000,
+  IDR: 100000000000,
+  ILS: 1000000000,
+  INR: 10000000000,
+  ISK: 10000000000,
+  KRW: 100000000000,
+  MXN: 1000000000,
+  MYR: 1000000000,
+  NOK: 1000000000,
+  NZD: 1000000000,
+  PHP: 10000000000,
+  PLN: 1000000000,
+  RON: 1000000000,
+  RUB: 10000000000,
+  SEK: 1000000000,
+  SGD: 100000000,
+  THB: 10000000000,
+  TRY: 10000000000,
+  ZAR: 10000000000,
 };
 
 class PricesRepository {
@@ -64,17 +181,49 @@ class PricesRepository {
     }
     
     try {
-      await DB.query(`
-        INSERT INTO prices(time,             USD, EUR, GBP, CAD, CHF, AUD, JPY)
-        VALUE             (FROM_UNIXTIME(?), ?,   ?,   ?,   ?,   ?,   ?,   ?  )`,
-        [time, prices.USD, prices.EUR, prices.GBP, prices.CAD, prices.CHF, prices.AUD, prices.JPY]
-      );
+      if (!config.FIAT_PRICE.API_KEY) { // Store only the 7 main currencies
+          await DB.query(`
+          INSERT INTO prices(time,             USD, EUR, GBP, CAD, CHF, AUD, JPY)
+          VALUE             (FROM_UNIXTIME(?), ?,   ?,   ?,   ?,   ?,   ?,   ?  )`,
+          [time, prices.USD, prices.EUR, prices.GBP, prices.CAD, prices.CHF, prices.AUD, prices.JPY]
+        );
+      } else { // Store all 7 main currencies + all the currencies obtained with the external API
+        await DB.query(`
+          INSERT INTO prices(time,             USD, EUR, GBP, CAD, CHF, AUD, JPY, BGN, BRL, CNY, CZK, DKK, HKD, HRK, HUF, IDR, ILS, INR, ISK, KRW, MXN, MYR, NOK, NZD, PHP, PLN, RON, RUB, SEK, SGD, THB, TRY, ZAR)
+          VALUE             (FROM_UNIXTIME(?), ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?  , ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?  , ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?  , ?  )`,
+          [time, prices.USD, prices.EUR, prices.GBP, prices.CAD, prices.CHF, prices.AUD, prices.JPY, prices.BGN, prices.BRL, prices.CNY, prices.CZK, prices.DKK, 
+                prices.HKD, prices.HRK, prices.HUF, prices.IDR, prices.ILS, prices.INR, prices.ISK, prices.KRW, prices.MXN, prices.MYR, prices.NOK, prices.NZD, 
+                prices.PHP, prices.PLN, prices.RON, prices.RUB, prices.SEK, prices.SGD, prices.THB, prices.TRY, prices.ZAR]
+        );
+      }
     } catch (e) {
       logger.err(`Cannot save exchange rate into db. Reason: ` + (e instanceof Error ? e.message : e));
       throw e;
     }
   }
 
+  public async $saveAdditionalCurrencyPrices(time: number, prices: ApiPrice, legacyCurrencies: string[]): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE prices
+        SET BGN = ?, BRL = ?, CNY = ?, CZK = ?, DKK = ?, HKD = ?, HRK = ?, HUF = ?, IDR = ?, ILS = ?, INR = ?, ISK = ?, KRW = ?, MXN = ?, MYR = ?, NOK = ?, NZD = ?, PHP = ?, PLN = ?, RON = ?, RUB = ?, SEK = ?, SGD = ?, THB = ?, TRY = ?, ZAR = ?
+        WHERE UNIX_TIMESTAMP(time) = ?`,
+        [prices.BGN, prices.BRL, prices.CNY, prices.CZK, prices.DKK, prices.HKD, prices.HRK, prices.HUF, prices.IDR, prices.ILS, prices.INR, prices.ISK, prices.KRW, prices.MXN, prices.MYR, prices.NOK, prices.NZD, prices.PHP, prices.PLN, prices.RON, prices.RUB, prices.SEK, prices.SGD, prices.THB, prices.TRY, prices.ZAR, time]
+      );
+      for (const currency of legacyCurrencies) {
+        await DB.query(`
+          UPDATE prices
+          SET ${currency} = ?
+          WHERE UNIX_TIMESTAMP(time) = ?`,
+          [prices[currency], time]
+        );
+      }
+    } catch (e) {
+      logger.err(`Cannot update exchange rate into db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
   public async $getOldestPriceTime(): Promise<number> {
     const [oldestRow] = await DB.query(`
       SELECT UNIX_TIMESTAMP(time) AS time
@@ -118,6 +267,28 @@ class PricesRepository {
     return times.map(time => time.time);
   }
 
+  public async $getPricesTimesWithMissingFields(): Promise<{time: number, USD: number, eur_missing: boolean, gbp_missing: boolean, cad_missing: boolean, chf_missing: boolean, aud_missing: boolean, jpy_missing: boolean}[]> {
+    const [times] = await DB.query(`
+      SELECT UNIX_TIMESTAMP(time) AS time, 
+             USD, 
+             CASE WHEN EUR = -1 THEN TRUE ELSE FALSE END AS eur_missing,
+             CASE WHEN GBP = -1 THEN TRUE ELSE FALSE END AS gbp_missing,
+             CASE WHEN CAD = -1 THEN TRUE ELSE FALSE END AS cad_missing,
+             CASE WHEN CHF = -1 THEN TRUE ELSE FALSE END AS chf_missing,
+             CASE WHEN AUD = -1 THEN TRUE ELSE FALSE END AS aud_missing,
+             CASE WHEN JPY = -1 THEN TRUE ELSE FALSE END AS jpy_missing
+      FROM prices
+      WHERE USD != -1 
+      AND -1 IN (EUR, GBP, CAD, CHF, AUD, JPY, BGN, BRL, CNY, CZK, DKK, HKD, HRK, HUF, IDR, ILS, INR, ISK, KRW, 
+                 MXN, MYR, NOK, NZD, PHP, PLN, RON, RUB, SEK, SGD, THB, TRY, ZAR)
+      ORDER BY time DESC
+    `);
+    if (!Array.isArray(times)) {
+      return [];
+    }
+    return times as {time: number, USD: number, eur_missing: boolean, gbp_missing: boolean, cad_missing: boolean, chf_missing: boolean, aud_missing: boolean, jpy_missing: boolean}[];
+  }
+
   public async $getPricesTimesAndId(): Promise<{time: number, id: number, USD: number}[]> {
     const [times] = await DB.query(`
       SELECT
@@ -144,7 +315,7 @@ class PricesRepository {
     return rates[0] as ApiPrice;
   }
 
-  public async $getNearestHistoricalPrice(timestamp: number | undefined): Promise<Conversion | null> {
+  public async $getNearestHistoricalPrice(timestamp: number | undefined, currency?: string): Promise<Conversion | null> {
     try {
       const [rates] = await DB.query(`
         SELECT ${ApiPriceFields}
@@ -158,24 +329,91 @@ class PricesRepository {
         throw Error(`Cannot get single historical price from the database`);
       }
 
+      const [latestPrices] = await DB.query(`
+        SELECT ${ApiPriceFields}
+        FROM prices
+        ORDER BY time DESC
+        LIMIT 1
+      `);
+      if (!Array.isArray(latestPrices)) {
+        throw Error(`Cannot get single historical price from the database`);
+      }      
+      
       // Compute fiat exchange rates
-      let latestPrice = rates[0] as ApiPrice;
+      let latestPrice = latestPrices[0] as ApiPrice;
       if (!latestPrice || latestPrice.USD === -1) {
         latestPrice = priceUpdater.getEmptyPricesObj();
       }
 
-      const computeFx = (usd: number, other: number): number =>
-        Math.round(Math.max(other, 0) / Math.max(usd, 1) * 100) / 100;
+      const computeFx = (usd: number, other: number): number => usd <= 0.05 ? 0 : Math.round(Math.max(other, 0) / usd * 100) / 100;
       
-      const exchangeRates: ExchangeRates = {
-        USDEUR: computeFx(latestPrice.USD, latestPrice.EUR),
-        USDGBP: computeFx(latestPrice.USD, latestPrice.GBP),
-        USDCAD: computeFx(latestPrice.USD, latestPrice.CAD),
-        USDCHF: computeFx(latestPrice.USD, latestPrice.CHF),
-        USDAUD: computeFx(latestPrice.USD, latestPrice.AUD),
-        USDJPY: computeFx(latestPrice.USD, latestPrice.JPY),
+      const exchangeRates: ExchangeRates = config.FIAT_PRICE.API_KEY ? 
+        {
+          USDEUR: computeFx(latestPrice.USD, latestPrice.EUR),
+          USDGBP: computeFx(latestPrice.USD, latestPrice.GBP),
+          USDCAD: computeFx(latestPrice.USD, latestPrice.CAD),
+          USDCHF: computeFx(latestPrice.USD, latestPrice.CHF),
+          USDAUD: computeFx(latestPrice.USD, latestPrice.AUD),
+          USDJPY: computeFx(latestPrice.USD, latestPrice.JPY),
+          USDBGN: computeFx(latestPrice.USD, latestPrice.BGN),
+          USDBRL: computeFx(latestPrice.USD, latestPrice.BRL),
+          USDCNY: computeFx(latestPrice.USD, latestPrice.CNY),
+          USDCZK: computeFx(latestPrice.USD, latestPrice.CZK),
+          USDDKK: computeFx(latestPrice.USD, latestPrice.DKK),
+          USDHKD: computeFx(latestPrice.USD, latestPrice.HKD),
+          USDHRK: computeFx(latestPrice.USD, latestPrice.HRK),
+          USDHUF: computeFx(latestPrice.USD, latestPrice.HUF),
+          USDIDR: computeFx(latestPrice.USD, latestPrice.IDR),
+          USDILS: computeFx(latestPrice.USD, latestPrice.ILS),
+          USDINR: computeFx(latestPrice.USD, latestPrice.INR),
+          USDISK: computeFx(latestPrice.USD, latestPrice.ISK),
+          USDKRW: computeFx(latestPrice.USD, latestPrice.KRW),
+          USDMXN: computeFx(latestPrice.USD, latestPrice.MXN),
+          USDMYR: computeFx(latestPrice.USD, latestPrice.MYR),
+          USDNOK: computeFx(latestPrice.USD, latestPrice.NOK),
+          USDNZD: computeFx(latestPrice.USD, latestPrice.NZD),
+          USDPHP: computeFx(latestPrice.USD, latestPrice.PHP),
+          USDPLN: computeFx(latestPrice.USD, latestPrice.PLN),
+          USDRON: computeFx(latestPrice.USD, latestPrice.RON),
+          USDRUB: computeFx(latestPrice.USD, latestPrice.RUB),
+          USDSEK: computeFx(latestPrice.USD, latestPrice.SEK),
+          USDSGD: computeFx(latestPrice.USD, latestPrice.SGD),
+          USDTHB: computeFx(latestPrice.USD, latestPrice.THB),
+          USDTRY: computeFx(latestPrice.USD, latestPrice.TRY),
+          USDZAR: computeFx(latestPrice.USD, latestPrice.ZAR),
+        } : {
+          USDEUR: computeFx(latestPrice.USD, latestPrice.EUR),
+          USDGBP: computeFx(latestPrice.USD, latestPrice.GBP),
+          USDCAD: computeFx(latestPrice.USD, latestPrice.CAD),
+          USDCHF: computeFx(latestPrice.USD, latestPrice.CHF),
+          USDAUD: computeFx(latestPrice.USD, latestPrice.AUD),
+          USDJPY: computeFx(latestPrice.USD, latestPrice.JPY),
       };
 
+      if (currency) {
+        if (!latestPrice[currency]) {
+          return null;
+        }
+        const filteredRates = rates.map((rate: any) => {
+          return {
+            time: rate.time,
+            [currency]: rate[currency],
+            ['USD']: rate['USD']
+          };
+        });
+        if (filteredRates.length === 0) { // No price data before 2010-07-19: add a fake entry
+          filteredRates.push({
+            time: 1279497600,
+            [currency]: 0,
+            ['USD']: 0
+          });
+        }
+        return {
+          prices: filteredRates as ApiPrice[],
+          exchangeRates: exchangeRates
+        };
+      }
+
       return {
         prices: rates as ApiPrice[],
         exchangeRates: exchangeRates
@@ -186,7 +424,7 @@ class PricesRepository {
     }
   }
 
-  public async $getHistoricalPrices(): Promise<Conversion | null> {
+  public async $getHistoricalPrices(currency?: string): Promise<Conversion | null> {
     try {
       const [rates] = await DB.query(`
         SELECT ${ApiPriceFields}
@@ -203,18 +441,69 @@ class PricesRepository {
         latestPrice = priceUpdater.getEmptyPricesObj();
       }
 
-      const computeFx = (usd: number, other: number): number =>
-        Math.round(Math.max(other, 0) / Math.max(usd, 1) * 100) / 100;
+      const computeFx = (usd: number, other: number): number => 
+        usd <= 0 ? 0 : Math.round(Math.max(other, 0) / usd * 100) / 100;
       
-      const exchangeRates: ExchangeRates = {
-        USDEUR: computeFx(latestPrice.USD, latestPrice.EUR),
-        USDGBP: computeFx(latestPrice.USD, latestPrice.GBP),
-        USDCAD: computeFx(latestPrice.USD, latestPrice.CAD),
-        USDCHF: computeFx(latestPrice.USD, latestPrice.CHF),
-        USDAUD: computeFx(latestPrice.USD, latestPrice.AUD),
-        USDJPY: computeFx(latestPrice.USD, latestPrice.JPY),
+      const exchangeRates: ExchangeRates = config.FIAT_PRICE.API_KEY ? 
+        {
+          USDEUR: computeFx(latestPrice.USD, latestPrice.EUR),
+          USDGBP: computeFx(latestPrice.USD, latestPrice.GBP),
+          USDCAD: computeFx(latestPrice.USD, latestPrice.CAD),
+          USDCHF: computeFx(latestPrice.USD, latestPrice.CHF),
+          USDAUD: computeFx(latestPrice.USD, latestPrice.AUD),
+          USDJPY: computeFx(latestPrice.USD, latestPrice.JPY),
+          USDBGN: computeFx(latestPrice.USD, latestPrice.BGN),
+          USDBRL: computeFx(latestPrice.USD, latestPrice.BRL),
+          USDCNY: computeFx(latestPrice.USD, latestPrice.CNY),
+          USDCZK: computeFx(latestPrice.USD, latestPrice.CZK),
+          USDDKK: computeFx(latestPrice.USD, latestPrice.DKK),
+          USDHKD: computeFx(latestPrice.USD, latestPrice.HKD),
+          USDHRK: computeFx(latestPrice.USD, latestPrice.HRK),
+          USDHUF: computeFx(latestPrice.USD, latestPrice.HUF),
+          USDIDR: computeFx(latestPrice.USD, latestPrice.IDR),
+          USDILS: computeFx(latestPrice.USD, latestPrice.ILS),
+          USDINR: computeFx(latestPrice.USD, latestPrice.INR),
+          USDISK: computeFx(latestPrice.USD, latestPrice.ISK),
+          USDKRW: computeFx(latestPrice.USD, latestPrice.KRW),
+          USDMXN: computeFx(latestPrice.USD, latestPrice.MXN),
+          USDMYR: computeFx(latestPrice.USD, latestPrice.MYR),
+          USDNOK: computeFx(latestPrice.USD, latestPrice.NOK),
+          USDNZD: computeFx(latestPrice.USD, latestPrice.NZD),
+          USDPHP: computeFx(latestPrice.USD, latestPrice.PHP),
+          USDPLN: computeFx(latestPrice.USD, latestPrice.PLN),
+          USDRON: computeFx(latestPrice.USD, latestPrice.RON),
+          USDRUB: computeFx(latestPrice.USD, latestPrice.RUB),
+          USDSEK: computeFx(latestPrice.USD, latestPrice.SEK),
+          USDSGD: computeFx(latestPrice.USD, latestPrice.SGD),
+          USDTHB: computeFx(latestPrice.USD, latestPrice.THB),
+          USDTRY: computeFx(latestPrice.USD, latestPrice.TRY),
+          USDZAR: computeFx(latestPrice.USD, latestPrice.ZAR),
+        } : {
+          USDEUR: computeFx(latestPrice.USD, latestPrice.EUR),
+          USDGBP: computeFx(latestPrice.USD, latestPrice.GBP),
+          USDCAD: computeFx(latestPrice.USD, latestPrice.CAD),
+          USDCHF: computeFx(latestPrice.USD, latestPrice.CHF),
+          USDAUD: computeFx(latestPrice.USD, latestPrice.AUD),
+          USDJPY: computeFx(latestPrice.USD, latestPrice.JPY),
       };
 
+      if (currency) {
+        if (!latestPrice[currency]) {
+          return null;
+        }
+        const filteredRates = rates.map((rate: any) => {
+          return {
+            time: rate.time,
+            [currency]: rate[currency],
+            ['USD']: rate['USD']
+          };
+        });
+        return {
+          prices: filteredRates as ApiPrice[],
+          exchangeRates: exchangeRates
+        };
+      }
+
       return {
         prices: rates as ApiPrice[],
         exchangeRates: exchangeRates

backend/src/rpc-api/commands.ts

@@ -11,6 +11,7 @@ module.exports = {
   encryptWallet: 'encryptwallet',
   estimateFee: 'estimatefee', // bitcoind v0.10.0x
   estimatePriority: 'estimatepriority', // bitcoind v0.10.0+
+  estimateSmartFee: 'estimatesmartfee',
   generate: 'generate', // bitcoind v0.11.0+
   getAccount: 'getaccount',
   getAccountAddress: 'getaccountaddress',
@@ -91,4 +92,5 @@ module.exports = {
   walletPassphraseChange: 'walletpassphrasechange',
   getTxoutSetinfo: 'gettxoutsetinfo',
   getIndexInfo: 'getindexinfo',
+  testMempoolAccept: 'testmempoolaccept',
 };

backend/src/rpc-api/jsonrpc.ts

@@ -1,5 +1,6 @@
 var http = require('http')
 var https = require('https')
+import { readFileSync } from 'fs';
 
 var JsonRPC = function (opts) {
   // @ts-ignore
@@ -55,7 +56,13 @@ JsonRPC.prototype.call = function (method, params) {
     }
 
     // use HTTP auth if user and password set
-    if (this.opts.user && this.opts.pass) {
+    if (this.opts.cookie) {
+      if (!this.cachedCookie) {
+        this.cachedCookie = readFileSync(this.opts.cookie).toString();
+      }
+      // @ts-ignore
+      requestOptions.auth = this.cachedCookie;
+    } else if (this.opts.user && this.opts.pass) {
       // @ts-ignore
       requestOptions.auth = this.opts.user + ':' + this.opts.pass
     }
@@ -93,7 +100,7 @@ JsonRPC.prototype.call = function (method, params) {
       reject(err)
     })
 
-    request.on('response', function (response) {
+    request.on('response', (response) => {
       clearTimeout(reqTimeout)
 
       // We need to buffer the response chunks in a nonblocking way.
@@ -104,7 +111,7 @@ JsonRPC.prototype.call = function (method, params) {
       // When all the responses are finished, we decode the JSON and
       // depending on whether it's got a result or an error, we call
       // emitSuccess or emitError on the promise.
-      response.on('end', function () {
+      response.on('end', () => {
         var err
 
         if (cbCalled) return
@@ -113,6 +120,14 @@ JsonRPC.prototype.call = function (method, params) {
         try {
           var decoded = JSON.parse(buffer)
         } catch (e) {
+          // if we authenticated using a cookie and it failed, read the cookie file again
+          if (
+            response.statusCode === 401 /* Unauthorized */ &&
+            this.opts.cookie
+          ) {
+            this.cachedCookie = undefined;
+          }
+
           if (response.statusCode !== 200) {
             err = new Error('Invalid params, response status code: ' + response.statusCode)
             err.code = -32602

backend/src/tasks/lightning/forensics.service.ts

@@ -15,8 +15,6 @@ class ForensicsService {
   txCache: { [txid: string]: IEsploraApi.Transaction } = {};
   tempCached: string[] = [];
 
-  constructor() {}
-
   public async $startService(): Promise<void> {
     logger.info('Starting lightning network forensics service');
 
@@ -66,93 +64,138 @@ class ForensicsService {
   */
 
   public async $runClosedChannelsForensics(onlyNewChannels: boolean = false): Promise<void> {
+    // Only Esplora backend can retrieve spent transaction outputs
     if (config.MEMPOOL.BACKEND !== 'esplora') {
       return;
     }
 
-    let progress = 0;
-
     try {
       logger.debug(`Started running closed channel forensics...`);
-      let channels;
+      let allChannels;
       if (onlyNewChannels) {
-        channels = await channelsApi.$getClosedChannelsWithoutReason();
+        allChannels = await channelsApi.$getClosedChannelsWithoutReason();
       } else {
-        channels = await channelsApi.$getUnresolvedClosedChannels();
+        allChannels = await channelsApi.$getUnresolvedClosedChannels();
       }
 
-      for (const channel of channels) {
-        let reason = 0;
-        let resolvedForceClose = false;
-        // Only Esplora backend can retrieve spent transaction outputs
-        const cached: string[] = [];
+      let progress = 0;
+      const sliceLength = Math.ceil(config.ESPLORA.BATCH_QUERY_BASE_SIZE / 10);
+      // process batches of 1000 channels
+      for (let i = 0; i < Math.ceil(allChannels.length / sliceLength); i++) {
+        const channels = allChannels.slice(i * sliceLength, (i + 1) * sliceLength);
+
+        let allOutspends: IEsploraApi.Outspend[][] = [];
+        const forceClosedChannels: { channel: any, cachedSpends: string[] }[] = [];
+
+        // fetch outspends in bulk
         try {
-          let outspends: IEsploraApi.Outspend[] | undefined;
-          try {
-            outspends = await bitcoinApi.$getOutspends(channel.closing_transaction_id);
-            await Common.sleep$(config.LIGHTNING.FORENSICS_RATE_LIMIT);
-          } catch (e) {
-            logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/tx/' + channel.closing_transaction_id + '/outspends'}. Reason ${e instanceof Error ? e.message : e}`);
-            continue;
-          }
-          const lightningScriptReasons: number[] = [];
+          const outspendTxids = channels.map(channel => channel.closing_transaction_id);
+          allOutspends = await bitcoinApi.$getBatchedOutspendsInternal(outspendTxids);
+          logger.info(`Fetched outspends for ${allOutspends.length} txs from esplora for LN forensics`);
+          await Common.sleep$(config.LIGHTNING.FORENSICS_RATE_LIMIT);
+        } catch (e) {
+          logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/internal/txs/outspends/by-txid'}. Reason ${e instanceof Error ? e.message : e}`);
+        }
+        // fetch spending transactions in bulk and load into txCache
+        const newSpendingTxids: { [txid: string]: boolean } = {};
+        for (const outspends of allOutspends) {
           for (const outspend of outspends) {
             if (outspend.spent && outspend.txid) {
-              let spendingTx = await this.fetchTransaction(outspend.txid);
-              if (!spendingTx) {
-                continue;
-              }
-              cached.push(spendingTx.txid);
-              const lightningScript = this.findLightningScript(spendingTx.vin[outspend.vin || 0]);
-              lightningScriptReasons.push(lightningScript);
+              newSpendingTxids[outspend.txid] = true;
             }
           }
-          const filteredReasons = lightningScriptReasons.filter((r) => r !== 1);
-          if (filteredReasons.length) {
-            if (filteredReasons.some((r) => r === 2 || r === 4)) {
-              reason = 3;
-            } else {
-              reason = 2;
-              resolvedForceClose = true;
-            }
-          } else {
-            /*
-              We can detect a commitment transaction (force close) by reading Sequence and Locktime
-              https://github.com/lightning/bolts/blob/master/03-transactions.md#commitment-transaction
-            */
-            let closingTx = await this.fetchTransaction(channel.closing_transaction_id, true);
-            if (!closingTx) {
+        }
+        const allOutspendTxs = await this.fetchTransactions(
+          allOutspends.flatMap(outspends =>
+            outspends
+              .filter(outspend => outspend.spent && outspend.txid)
+              .map(outspend => outspend.txid)
+          )
+        );
+        logger.info(`Fetched ${allOutspendTxs.length} out-spending txs from esplora for LN forensics`);
+
+        // process each outspend
+        for (const [index, channel] of channels.entries()) {
+          let reason = 0;
+          const cached: string[] = [];
+          try {
+            const outspends = allOutspends[index];
+            if (!outspends || !outspends.length) {
+              // outspends are missing
               continue;
             }
-            cached.push(closingTx.txid);
-            const sequenceHex: string = closingTx.vin[0].sequence.toString(16);
-            const locktimeHex: string = closingTx.locktime.toString(16);
-            if (sequenceHex.substring(0, 2) === '80' && locktimeHex.substring(0, 2) === '20') {
-              reason = 2; // Here we can't be sure if it's a penalty or not
-            } else {
-              reason = 1;
+            const lightningScriptReasons: number[] = [];
+            for (const outspend of outspends) {
+              if (outspend.spent && outspend.txid) {
+                const spendingTx = this.txCache[outspend.txid];
+                if (!spendingTx) {
+                  continue;
+                }
+                cached.push(spendingTx.txid);
+                const lightningScript = this.findLightningScript(spendingTx.vin[outspend.vin || 0]);
+                lightningScriptReasons.push(lightningScript);
+              }
             }
-          }
-          if (reason) {
-            logger.debug('Setting closing reason ' + reason + ' for channel: ' + channel.id + '.');
-            await DB.query(`UPDATE channels SET closing_reason = ? WHERE id = ?`, [reason, channel.id]);
-            if (reason === 2 && resolvedForceClose) {
-              await DB.query(`UPDATE channels SET closing_resolved = ? WHERE id = ?`, [true, channel.id]);
-            }
-            if (reason !== 2 || resolvedForceClose) {
+            const filteredReasons = lightningScriptReasons.filter((r) => r !== 1);
+            if (filteredReasons.length) {
+              if (filteredReasons.some((r) => r === 2 || r === 4)) {
+                // Force closed with penalty
+                reason = 3;
+              } else {
+                // Force closed without penalty
+                reason = 2;
+                await DB.query(`UPDATE channels SET closing_resolved = ? WHERE id = ?`, [true, channel.id]);
+              }
+              await DB.query(`UPDATE channels SET closing_reason = ? WHERE id = ?`, [reason, channel.id]);
+              // clean up cached transactions
               cached.forEach(txid => {
                 delete this.txCache[txid];
               });
+            } else {
+              forceClosedChannels.push({ channel, cachedSpends: cached });
             }
+          } catch (e) {
+            logger.err(`$runClosedChannelsForensics() failed for channel ${channel.short_id}. Reason: ${e instanceof Error ? e.message : e}`);
           }
-        } catch (e) {
-          logger.err(`$runClosedChannelsForensics() failed for channel ${channel.short_id}. Reason: ${e instanceof Error ? e.message : e}`);
         }
 
-        ++progress;
+        // fetch force-closing transactions in bulk
+        const closingTxs = await this.fetchTransactions(forceClosedChannels.map(x => x.channel.closing_transaction_id));
+        logger.info(`Fetched ${closingTxs.length} closing txs from esplora for LN forensics`);
+
+        // process channels with no lightning script reasons
+        for (const { channel, cachedSpends } of forceClosedChannels) {
+          const closingTx = this.txCache[channel.closing_transaction_id];
+          if (!closingTx) {
+            // no channel close transaction found yet
+            continue;
+          }
+          /*
+            We can detect a commitment transaction (force close) by reading Sequence and Locktime
+            https://github.com/lightning/bolts/blob/master/03-transactions.md#commitment-transaction
+          */
+          const sequenceHex: string = closingTx.vin[0].sequence.toString(16);
+          const locktimeHex: string = closingTx.locktime.toString(16);
+          let reason;
+          if (sequenceHex.substring(0, 2) === '80' && locktimeHex.substring(0, 2) === '20') {
+            // Force closed, but we can't be sure if it's a penalty or not
+            reason = 2;
+          } else {
+            // Mutually closed
+            reason = 1;
+            // clean up cached transactions
+            delete this.txCache[closingTx.txid];
+            for (const txid of cachedSpends) {
+              delete this.txCache[txid];
+            }
+          }
+          await DB.query(`UPDATE channels SET closing_reason = ? WHERE id = ?`, [reason, channel.id]);
+        }
+
+        progress += channels.length;
         const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
         if (elapsedSeconds > 10) {
-          logger.debug(`Updating channel closed channel forensics ${progress}/${channels.length}`);
+          logger.debug(`Updating channel closed channel forensics ${progress}/${allChannels.length}`);
           this.loggerTimer = new Date().getTime() / 1000;
         }
       }
@@ -220,8 +263,11 @@ class ForensicsService {
       logger.debug(`Started running open channel forensics...`);
       const channels = await channelsApi.$getChannelsWithoutSourceChecked();
 
+      // preload open channel transactions
+      await this.fetchTransactions(channels.map(channel => channel.transaction_id), true);
+
       for (const openChannel of channels) {
-        let openTx = await this.fetchTransaction(openChannel.transaction_id, true);
+        const openTx = this.txCache[openChannel.transaction_id];
         if (!openTx) {
           continue;
         }
@@ -276,7 +322,7 @@ class ForensicsService {
 
   // Check if a channel open tx input spends the result of a swept channel close output
   private async $attributeSweptChannelCloses(openChannel: ILightningApi.Channel, input: IEsploraApi.Vin): Promise<void> {
-    let sweepTx = await this.fetchTransaction(input.txid, true);
+    const sweepTx = await this.fetchTransaction(input.txid, true);
     if (!sweepTx) {
       logger.err(`couldn't find input transaction for channel forensics ${openChannel.channel_id} ${input.txid}`);
       return;
@@ -335,7 +381,7 @@ class ForensicsService {
 
     if (matched && !ambiguous) {
       // fetch closing channel transaction and perform forensics on the outputs
-      let prevChannelTx = await this.fetchTransaction(input.txid, true);
+      const prevChannelTx = await this.fetchTransaction(input.txid, true);
       let outspends: IEsploraApi.Outspend[] | undefined;
       try {
         outspends = await bitcoinApi.$getOutspends(input.txid);
@@ -355,17 +401,17 @@ class ForensicsService {
             };
           });
         }
+
+        // preload outspend transactions
+        await this.fetchTransactions(outspends.filter(o => o.spent && o.txid).map(o => o.txid), true);
+
         for (let i = 0; i < outspends?.length; i++) {
           const outspend = outspends[i];
           const output = prevChannel.outputs[i];
           if (outspend.spent && outspend.txid) {
-            try {
-              const spendingTx = await this.fetchTransaction(outspend.txid, true);
-              if (spendingTx) {
-                output.type = this.findLightningScript(spendingTx.vin[outspend.vin || 0]);
-              }
-            } catch (e) {
-              logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/tx/' + outspend.txid}. Reason ${e instanceof Error ? e.message : e}`);
+            const spendingTx = this.txCache[outspend.txid];
+            if (spendingTx) {
+              output.type = this.findLightningScript(spendingTx.vin[outspend.vin || 0]);
             }
           } else {
             output.type = 0;
@@ -430,13 +476,36 @@ class ForensicsService {
         }
         await Common.sleep$(config.LIGHTNING.FORENSICS_RATE_LIMIT);
       } catch (e) {
-        logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/tx/' + txid + '/outspends'}. Reason ${e instanceof Error ? e.message : e}`);
+        logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/tx/' + txid}. Reason ${e instanceof Error ? e.message : e}`);
         return null;
       }
     }
     return tx;
   }
 
+  // fetches a batch of transactions and adds them to the txCache
+  // the returned list of txs does *not* preserve ordering or number
+  async fetchTransactions(txids, temp: boolean = false): Promise<(IEsploraApi.Transaction | null)[]> {
+    // deduplicate txids
+    const uniqueTxids = [...new Set<string>(txids)];
+    // filter out any transactions we already have in the cache
+    const needToFetch: string[] = uniqueTxids.filter(txid => !this.txCache[txid]);
+    try {
+      const txs = await bitcoinApi.$getRawTransactions(needToFetch);
+      for (const tx of txs) {
+        this.txCache[tx.txid] = tx;
+        if (temp) {
+          this.tempCached.push(tx.txid);
+        }
+      }
+      await Common.sleep$(config.LIGHTNING.FORENSICS_RATE_LIMIT);
+    } catch (e) {
+      logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/txs'}. Reason ${e instanceof Error ? e.message : e}`);
+      return [];
+    }
+    return txids.map(txid => this.txCache[txid]);
+  }
+
   clearTempCache(): void {
     for (const txid of this.tempCached) {
       delete this.txCache[txid];

backend/src/tasks/lightning/network-sync.service.ts

@@ -288,22 +288,32 @@ class NetworkSyncService {
       }
       logger.debug(`${log}`, logger.tags.ln);
 
-      const channels = await channelsApi.$getChannelsByStatus([0, 1]);
-      for (const channel of channels) {
-        const spendingTx = await bitcoinApi.$getOutspend(channel.transaction_id, channel.transaction_vout);
-        if (spendingTx.spent === true && spendingTx.status?.confirmed === true) {
-          logger.debug(`Marking channel: ${channel.id} as closed.`, logger.tags.ln);
-          await DB.query(`UPDATE channels SET status = 2, closing_date = FROM_UNIXTIME(?) WHERE id = ?`,
-            [spendingTx.status.block_time, channel.id]);
-          if (spendingTx.txid && !channel.closing_transaction_id) {
-            await DB.query(`UPDATE channels SET closing_transaction_id = ? WHERE id = ?`, [spendingTx.txid, channel.id]);
+      const allChannels = await channelsApi.$getChannelsByStatus([0, 1]);
+
+      const sliceLength = Math.ceil(config.ESPLORA.BATCH_QUERY_BASE_SIZE / 2);
+      // process batches of 5000 channels
+      for (let i = 0; i < Math.ceil(allChannels.length / sliceLength); i++) {
+        const channels = allChannels.slice(i * sliceLength, (i + 1) * sliceLength);
+        const outspends = await bitcoinApi.$getOutSpendsByOutpoint(channels.map(channel => {
+          return { txid: channel.transaction_id, vout: channel.transaction_vout };
+        }));
+
+        for (const [index, channel] of channels.entries()) {
+          const spendingTx = outspends[index];
+          if (spendingTx.spent === true && spendingTx.status?.confirmed === true) {
+            // logger.debug(`Marking channel: ${channel.id} as closed.`, logger.tags.ln);
+            await DB.query(`UPDATE channels SET status = 2, closing_date = FROM_UNIXTIME(?) WHERE id = ?`,
+              [spendingTx.status.block_time, channel.id]);
+            if (spendingTx.txid && !channel.closing_transaction_id) {
+              await DB.query(`UPDATE channels SET closing_transaction_id = ? WHERE id = ?`, [spendingTx.txid, channel.id]);
+            }
           }
         }
 
-        ++progress;
+        progress += channels.length;
         const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
         if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
-          logger.debug(`Checking if channel has been closed ${progress}/${channels.length}`, logger.tags.ln);
+          logger.debug(`Checking if channel has been closed ${progress}/${allChannels.length}`, logger.tags.ln);
           this.loggerTimer = new Date().getTime() / 1000;
         }
       }

backend/src/tasks/price-feeds/coinbase-api.ts

@@ -5,14 +5,14 @@ class CoinbaseApi implements PriceFeed {
   public name: string = 'Coinbase';
   public currencies: string[] = ['USD', 'EUR', 'GBP'];
 
-  public url: string = 'https://api.coinbase.com/v2/prices/spot?currency=';
+  public url: string = 'https://api.coinbase.com/v2/prices/BTC-{CURRENCY}/spot';
   public urlHist: string = 'https://api.exchange.coinbase.com/products/BTC-{CURRENCY}/candles?granularity={GRANULARITY}';
 
   constructor() {
   }
 
   public async $fetchPrice(currency): Promise<number> {
-    const response = await query(this.url + currency);
+    const response = await query(this.url.replace('{CURRENCY}', currency));
     if (response && response['data'] && response['data']['amount']) {
       return parseInt(response['data']['amount'], 10);
     } else {

backend/src/tasks/price-feeds/free-currency-api.ts

@@ -0,0 +1,73 @@
+import { query } from '../../utils/axios-query';
+import { ConversionFeed, ConversionRates } from '../price-updater';
+
+const emptyRates = {
+  AUD: -1,
+  BGN: -1,
+  BRL: -1,
+  CAD: -1,
+  CHF: -1,
+  CNY: -1,
+  CZK: -1,
+  DKK: -1,
+  EUR: -1,
+  GBP: -1,
+  HKD: -1,
+  HRK: -1,
+  HUF: -1,
+  IDR: -1,
+  ILS: -1,
+  INR: -1,
+  ISK: -1,
+  JPY: -1,
+  KRW: -1,
+  MXN: -1,
+  MYR: -1,
+  NOK: -1,
+  NZD: -1,
+  PHP: -1,
+  PLN: -1,
+  RON: -1,
+  RUB: -1,
+  SEK: -1,
+  SGD: -1,
+  THB: -1,
+  TRY: -1,
+  USD: -1,
+  ZAR: -1,
+};
+
+class FreeCurrencyApi implements ConversionFeed {
+  private API_KEY: string;
+
+  constructor(apiKey: string) {
+    this.API_KEY = apiKey;
+  }
+
+  public async $getQuota(): Promise<any> {
+    const response = await query(`https://api.freecurrencyapi.com/v1/status?apikey=${this.API_KEY}`);
+    if (response && response['quotas']) {
+      return response['quotas'];
+    }
+    return null;
+  }
+
+  public async $fetchLatestConversionRates(): Promise<ConversionRates> {
+    const response = await query(`https://api.freecurrencyapi.com/v1/latest?apikey=${this.API_KEY}`);
+    if (response && response['data']) {
+      return response['data'];
+    }
+    return emptyRates;
+  }
+
+  public async $fetchConversionRates(date: string): Promise<ConversionRates> {
+    const response = await query(`https://api.freecurrencyapi.com/v1/historical?date=${date}&apikey=${this.API_KEY}`);
+    if (response && response['data'] && response['data'][date]) {
+      return response['data'][date];
+    }
+    return emptyRates;
+  }
+
+}
+
+export default FreeCurrencyApi;

backend/src/tasks/price-updater.ts

@@ -8,6 +8,7 @@ import BitflyerApi from './price-feeds/bitflyer-api';
 import CoinbaseApi from './price-feeds/coinbase-api';
 import GeminiApi from './price-feeds/gemini-api';
 import KrakenApi from './price-feeds/kraken-api';
+import FreeCurrencyApi from './price-feeds/free-currency-api';
 
 export interface PriceFeed {
   name: string;
@@ -23,8 +24,29 @@ export interface PriceHistory {
   [timestamp: number]: ApiPrice;
 }
 
+export interface ConversionFeed {
+  $getQuota(): Promise<any>;
+  $fetchLatestConversionRates(): Promise<ConversionRates>;
+  $fetchConversionRates(date: string): Promise<ConversionRates>;
+}
+
+export interface ConversionRates {
+  [currency: string]: number
+}
+
+function getMedian(arr: number[]): number {
+  const sortedArr = arr.slice().sort((a, b) => a - b);
+  const mid = Math.floor(sortedArr.length / 2);
+  return sortedArr.length % 2 !== 0
+      ? sortedArr[mid]
+      : (sortedArr[mid - 1] + sortedArr[mid]) / 2;
+}
+
 class PriceUpdater {
   public historyInserted = false;
+  private additionalCurrenciesHistoryInserted = false;
+  private additionalCurrenciesHistoryRunning = false;
+  private lastFailedHistoricalRun = 0;
   private timeBetweenUpdatesMs = 360_0000 / config.MEMPOOL.PRICE_UPDATES_PER_HOUR;
   private cyclePosition = -1;
   private firstRun = true;
@@ -34,6 +56,10 @@ class PriceUpdater {
   private feeds: PriceFeed[] = [];
   private currencies: string[] = ['USD', 'EUR', 'GBP', 'CAD', 'CHF', 'AUD', 'JPY'];
   private latestPrices: ApiPrice;
+  private currencyConversionFeed: ConversionFeed | undefined;
+  private newCurrencies: string[] = ['BGN', 'BRL', 'CNY', 'CZK', 'DKK', 'HKD', 'HRK', 'HUF', 'IDR', 'ILS', 'INR', 'ISK', 'KRW', 'MXN', 'MYR', 'NOK', 'NZD', 'PHP', 'PLN', 'RON', 'RUB', 'SEK', 'SGD', 'THB', 'TRY', 'ZAR'];
+  private lastTimeConversionsRatesFetched: number = 0;
+  private latestConversionsRatesFromFeed: ConversionRates = {};
   private ratesChangedCallback: ((rates: ApiPrice) => void) | undefined;
 
   constructor() {
@@ -45,6 +71,7 @@ class PriceUpdater {
     this.feeds.push(new BitfinexApi());
     this.feeds.push(new GeminiApi());
 
+    this.currencyConversionFeed = new FreeCurrencyApi(config.FIAT_PRICE.API_KEY);
     this.setCyclePosition();
   }
 
@@ -62,6 +89,32 @@ class PriceUpdater {
       CHF: -1,
       AUD: -1,
       JPY: -1,
+      BGN: -1,
+      BRL: -1,
+      CNY: -1,
+      CZK: -1,
+      DKK: -1,
+      HKD: -1,
+      HRK: -1,
+      HUF: -1,
+      IDR: -1,
+      ILS: -1,
+      INR: -1,
+      ISK: -1,
+      KRW: -1,
+      MXN: -1,
+      MYR: -1,
+      NOK: -1,
+      NZD: -1,
+      PHP: -1,
+      PLN: -1,
+      RON: -1,
+      RUB: -1,
+      SEK: -1,
+      SGD: -1,
+      THB: -1,
+      TRY: -1,
+      ZAR: -1,
     };
   }
 
@@ -91,6 +144,23 @@ class PriceUpdater {
     if ((Math.round(new Date().getTime() / 1000) - this.lastHistoricalRun) > 3600 * 24) {
       // Once a day, look for missing prices (could happen due to network connectivity issues)
       this.historyInserted = false;
+      this.additionalCurrenciesHistoryInserted = false;
+    }
+
+    if (this.lastFailedHistoricalRun > 0 && (Math.round(new Date().getTime() / 1000) - this.lastFailedHistoricalRun) > 60) {
+      // If the last attempt to insert missing prices failed, we try again after 60 seconds
+      this.additionalCurrenciesHistoryInserted = false;
+    }
+
+    if (config.FIAT_PRICE.API_KEY && this.currencyConversionFeed && (Math.round(new Date().getTime() / 1000) - this.lastTimeConversionsRatesFetched) > 3600 * 24) {
+      // Once a day, fetch conversion rates from api: we don't need more granularity for fiat currencies and have a limited number of requests
+      try {
+        this.latestConversionsRatesFromFeed = await this.currencyConversionFeed.$fetchLatestConversionRates();
+        this.lastTimeConversionsRatesFetched = Math.round(new Date().getTime() / 1000);
+        logger.debug(`Fetched currencies conversion rates from external API: ${JSON.stringify(this.latestConversionsRatesFromFeed)}`);
+      } catch (e) {
+        logger.err(`Cannot fetch conversion rates from the API. Reason: ${(e instanceof Error ? e.message : e)}`);
+      }
     }
 
     try {
@@ -98,6 +168,10 @@ class PriceUpdater {
       if (this.historyInserted === false && config.DATABASE.ENABLED === true) {
         await this.$insertHistoricalPrices();
       }
+      if (this.additionalCurrenciesHistoryInserted === false && config.DATABASE.ENABLED === true && config.FIAT_PRICE.API_KEY && !this.additionalCurrenciesHistoryRunning) {
+        await this.$insertMissingAdditionalPrices();
+      }
+
     } catch (e: any) {
       logger.err(`Cannot save BTC prices in db. Reason: ${e instanceof Error ? e.message : e}`, logger.tags.mining);
     }
@@ -173,7 +247,15 @@ class PriceUpdater {
       if (prices.length === 0) {
         this.latestPrices[currency] = -1;
       } else {
-        this.latestPrices[currency] = Math.round((prices.reduce((partialSum, a) => partialSum + a, 0)) / prices.length);
+        this.latestPrices[currency] = Math.round(getMedian(prices));
+      }
+    }
+
+    if (config.FIAT_PRICE.API_KEY && this.latestPrices.USD > 0 && Object.keys(this.latestConversionsRatesFromFeed).length > 0) {
+      for (const conversionCurrency of this.newCurrencies) {
+        if (this.latestConversionsRatesFromFeed[conversionCurrency] > 0 && this.latestPrices.USD * this.latestConversionsRatesFromFeed[conversionCurrency] < MAX_PRICES[conversionCurrency]) {
+          this.latestPrices[conversionCurrency] = Math.round(this.latestPrices.USD * this.latestConversionsRatesFromFeed[conversionCurrency]);
+        }
       }
     }
 
@@ -245,7 +327,7 @@ class PriceUpdater {
     await this.$insertMissingRecentPrices('hour');
 
     this.historyInserted = true;
-    this.lastHistoricalRun = new Date().getTime();
+    this.lastHistoricalRun = Math.round(new Date().getTime() / 1000);
   }
 
   /**
@@ -300,9 +382,7 @@ class PriceUpdater {
         if (grouped[time][currency].length === 0) {
           continue;
         }
-        prices[currency] = Math.round((grouped[time][currency].reduce(
-          (partialSum, a) => partialSum + a, 0)
-        ) / grouped[time][currency].length);
+        prices[currency] = Math.round(getMedian(grouped[time][currency]));
       }
       await PricesRepository.$savePrices(parseInt(time, 10), prices);
       ++totalInserted;
@@ -314,6 +394,83 @@ class PriceUpdater {
       logger.debug(`Inserted ${totalInserted} ${type === 'day' ? 'dai' : 'hour'}ly historical prices into the db`, logger.tags.mining);
     }
   }
+
+  /**
+   * Find missing prices for additional currencies and insert them in the database
+   * We calculate the additional prices from the USD price and the conversion rates
+   */
+  private async $insertMissingAdditionalPrices(): Promise<void> {
+    this.lastFailedHistoricalRun = 0;
+    const priceTimesToFill = await PricesRepository.$getPricesTimesWithMissingFields();
+    if (priceTimesToFill.length === 0) {
+      return;
+    }
+    try {
+      const remainingQuota = await this.currencyConversionFeed?.$getQuota();
+      if (remainingQuota['month']['remaining'] < 500) { // We need some calls left for the daily updates
+        logger.debug(`Not enough currency API credit to insert missing prices in ${priceTimesToFill.length} rows (${remainingQuota['month']['remaining']} calls left).`, logger.tags.mining);
+        this.additionalCurrenciesHistoryInserted = true; // Do not try again until next day
+        return;
+      }
+    } catch (e) {
+      logger.err(`Cannot fetch currency API credit, insertion of missing prices aborted. Reason: ${(e instanceof Error ? e.message : e)}`);
+      return;
+    }
+
+    this.additionalCurrenciesHistoryRunning = true;
+    logger.debug(`Fetching missing conversion rates from external API to fill ${priceTimesToFill.length} rows`, logger.tags.mining);
+
+    let conversionRates: { [timestamp: number]: ConversionRates } = {};
+    let totalInserted = 0;
+
+    for (let i = 0; i < priceTimesToFill.length; i++) {
+      const priceTime = priceTimesToFill[i];
+      const missingLegacyCurrencies = this.getMissingLegacyCurrencies(priceTime); // In the case a legacy currency (EUR, GBP, CAD, CHF, AUD, JPY)
+      const year = new Date(priceTime.time * 1000).getFullYear();                 // is missing, we use the same process as for the new currencies
+      const month = new Date(priceTime.time * 1000).getMonth();
+      const yearMonthTimestamp = new Date(year, month, 1).getTime() / 1000;
+      if (conversionRates[yearMonthTimestamp] === undefined) {
+        conversionRates[yearMonthTimestamp] = await this.currencyConversionFeed?.$fetchConversionRates(`${year}-${month + 1 < 10 ? `0${month + 1}` : `${month + 1}`}-01`) || { USD: -1 };
+        if (conversionRates[yearMonthTimestamp]['USD'] < 0) {
+          logger.err(`Cannot fetch conversion rates from the API for ${year}-${month + 1 < 10 ? `0${month + 1}` : `${month + 1}`}-01. Aborting insertion of missing prices.`, logger.tags.mining);
+          this.lastFailedHistoricalRun = Math.round(new Date().getTime() / 1000);
+          break;
+        }
+      }
+
+      const prices: ApiPrice = this.getEmptyPricesObj();
+      
+      let willInsert = false;
+      for (const conversionCurrency of this.newCurrencies.concat(missingLegacyCurrencies)) {
+        if (conversionRates[yearMonthTimestamp][conversionCurrency] > 0 && priceTime.USD * conversionRates[yearMonthTimestamp][conversionCurrency] < MAX_PRICES[conversionCurrency]) {
+          prices[conversionCurrency] = year >= 2013 ? Math.round(priceTime.USD * conversionRates[yearMonthTimestamp][conversionCurrency]) : Math.round(priceTime.USD * conversionRates[yearMonthTimestamp][conversionCurrency] * 100) / 100;
+          willInsert = true;
+        } else {
+          prices[conversionCurrency] = 0;
+        }
+      }
+      
+      if (willInsert) {
+        await PricesRepository.$saveAdditionalCurrencyPrices(priceTime.time, prices, missingLegacyCurrencies);
+        ++totalInserted;
+      }
+    }
+
+    logger.debug(`Inserted ${totalInserted} missing additional currency prices into the db`, logger.tags.mining);
+    this.additionalCurrenciesHistoryInserted = true;
+    this.additionalCurrenciesHistoryRunning = false;
+  }
+
+  // Helper function to get legacy missing currencies in a row (EUR, GBP, CAD, CHF, AUD, JPY)
+  private getMissingLegacyCurrencies(priceTime: any): string[] {
+    const missingCurrencies: string[] = [];
+    ['eur', 'gbp', 'cad', 'chf', 'aud', 'jpy'].forEach(currency => {
+      if (priceTime[`${currency}_missing`]) {
+        missingCurrencies.push(currency.toUpperCase());
+      }
+    });
+    return missingCurrencies;
+  }
 }
 
 export default new PriceUpdater();

backend/src/utils/bitcoin-script.ts

@@ -0,0 +1,203 @@
+const opcodes = {
+  OP_FALSE: 0,
+  OP_0: 0,
+  OP_PUSHDATA1: 76,
+  OP_PUSHDATA2: 77,
+  OP_PUSHDATA4: 78,
+  OP_1NEGATE: 79,
+  OP_PUSHNUM_NEG1: 79,
+  OP_RESERVED: 80,
+  OP_TRUE: 81,
+  OP_1: 81,
+  OP_2: 82,
+  OP_3: 83,
+  OP_4: 84,
+  OP_5: 85,
+  OP_6: 86,
+  OP_7: 87,
+  OP_8: 88,
+  OP_9: 89,
+  OP_10: 90,
+  OP_11: 91,
+  OP_12: 92,
+  OP_13: 93,
+  OP_14: 94,
+  OP_15: 95,
+  OP_16: 96,
+  OP_PUSHNUM_1: 81,
+  OP_PUSHNUM_2: 82,
+  OP_PUSHNUM_3: 83,
+  OP_PUSHNUM_4: 84,
+  OP_PUSHNUM_5: 85,
+  OP_PUSHNUM_6: 86,
+  OP_PUSHNUM_7: 87,
+  OP_PUSHNUM_8: 88,
+  OP_PUSHNUM_9: 89,
+  OP_PUSHNUM_10: 90,
+  OP_PUSHNUM_11: 91,
+  OP_PUSHNUM_12: 92,
+  OP_PUSHNUM_13: 93,
+  OP_PUSHNUM_14: 94,
+  OP_PUSHNUM_15: 95,
+  OP_PUSHNUM_16: 96,
+  OP_NOP: 97,
+  OP_VER: 98,
+  OP_IF: 99,
+  OP_NOTIF: 100,
+  OP_VERIF: 101,
+  OP_VERNOTIF: 102,
+  OP_ELSE: 103,
+  OP_ENDIF: 104,
+  OP_VERIFY: 105,
+  OP_RETURN: 106,
+  OP_TOALTSTACK: 107,
+  OP_FROMALTSTACK: 108,
+  OP_2DROP: 109,
+  OP_2DUP: 110,
+  OP_3DUP: 111,
+  OP_2OVER: 112,
+  OP_2ROT: 113,
+  OP_2SWAP: 114,
+  OP_IFDUP: 115,
+  OP_DEPTH: 116,
+  OP_DROP: 117,
+  OP_DUP: 118,
+  OP_NIP: 119,
+  OP_OVER: 120,
+  OP_PICK: 121,
+  OP_ROLL: 122,
+  OP_ROT: 123,
+  OP_SWAP: 124,
+  OP_TUCK: 125,
+  OP_CAT: 126,
+  OP_SUBSTR: 127,
+  OP_LEFT: 128,
+  OP_RIGHT: 129,
+  OP_SIZE: 130,
+  OP_INVERT: 131,
+  OP_AND: 132,
+  OP_OR: 133,
+  OP_XOR: 134,
+  OP_EQUAL: 135,
+  OP_EQUALVERIFY: 136,
+  OP_RESERVED1: 137,
+  OP_RESERVED2: 138,
+  OP_1ADD: 139,
+  OP_1SUB: 140,
+  OP_2MUL: 141,
+  OP_2DIV: 142,
+  OP_NEGATE: 143,
+  OP_ABS: 144,
+  OP_NOT: 145,
+  OP_0NOTEQUAL: 146,
+  OP_ADD: 147,
+  OP_SUB: 148,
+  OP_MUL: 149,
+  OP_DIV: 150,
+  OP_MOD: 151,
+  OP_LSHIFT: 152,
+  OP_RSHIFT: 153,
+  OP_BOOLAND: 154,
+  OP_BOOLOR: 155,
+  OP_NUMEQUAL: 156,
+  OP_NUMEQUALVERIFY: 157,
+  OP_NUMNOTEQUAL: 158,
+  OP_LESSTHAN: 159,
+  OP_GREATERTHAN: 160,
+  OP_LESSTHANOREQUAL: 161,
+  OP_GREATERTHANOREQUAL: 162,
+  OP_MIN: 163,
+  OP_MAX: 164,
+  OP_WITHIN: 165,
+  OP_RIPEMD160: 166,
+  OP_SHA1: 167,
+  OP_SHA256: 168,
+  OP_HASH160: 169,
+  OP_HASH256: 170,
+  OP_CODESEPARATOR: 171,
+  OP_CHECKSIG: 172,
+  OP_CHECKSIGVERIFY: 173,
+  OP_CHECKMULTISIG: 174,
+  OP_CHECKMULTISIGVERIFY: 175,
+  OP_NOP1: 176,
+  OP_NOP2: 177,
+  OP_CHECKLOCKTIMEVERIFY: 177,
+  OP_CLTV: 177,
+  OP_NOP3: 178,
+  OP_CHECKSEQUENCEVERIFY: 178,
+  OP_CSV: 178,
+  OP_NOP4: 179,
+  OP_NOP5: 180,
+  OP_NOP6: 181,
+  OP_NOP7: 182,
+  OP_NOP8: 183,
+  OP_NOP9: 184,
+  OP_NOP10: 185,
+  OP_CHECKSIGADD: 186,
+  OP_PUBKEYHASH: 253,
+  OP_PUBKEY: 254,
+  OP_INVALIDOPCODE: 255,
+};
+// add unused opcodes
+for (let i = 187; i <= 255; i++) {
+  opcodes[`OP_RETURN_${i}`] = i;
+}
+
+export { opcodes };
+
+/** extracts m and n from a multisig script (asm), returns nothing if it is not a multisig script */
+export function parseMultisigScript(script: string): void | { m: number, n: number } {
+  if (!script) {
+    return;
+  }
+  const ops = script.split(' ');
+  if (ops.length < 3 || ops.pop() !== 'OP_CHECKMULTISIG') {
+    return;
+  }
+  const opN = ops.pop();
+  if (!opN) {
+    return;
+  }
+  if (!opN.startsWith('OP_PUSHNUM_')) {
+    return;
+  }
+  const n = parseInt(opN.match(/[0-9]+/)?.[0] || '', 10);
+  if (ops.length < n * 2 + 1) {
+    return;
+  }
+  // pop n public keys
+  for (let i = 0; i < n; i++) {
+    if (!/^0((2|3)\w{64}|4\w{128})$/.test(ops.pop() || '')) {
+      return;
+    }
+    if (!/^OP_PUSHBYTES_(33|65)$/.test(ops.pop() || '')) {
+      return;
+    }
+  }
+  const opM = ops.pop();
+  if (!opM) {
+    return;
+  }
+  if (!opM.startsWith('OP_PUSHNUM_')) {
+    return;
+  }
+  const m = parseInt(opM.match(/[0-9]+/)?.[0] || '', 10);
+
+  if (ops.length) {
+    return;
+  }
+
+  return { m, n };
+}
+
+export function getVarIntLength(n: number): number {
+  if (n < 0xfd) {
+    return 1;
+  } else if (n <= 0xffff) {
+    return 3;
+  } else if (n <= 0xffffffff) {
+    return 5;
+  } else {
+    return 9;
+  }
+}

backend/src/utils/secp256k1.ts

@@ -0,0 +1,77 @@
+function powMod(x: bigint, power: number, modulo: bigint): bigint {
+  for (let i = 0; i < power; i++) {
+    x = (x * x) % modulo;
+  }
+  return x;
+}
+
+function sqrtMod(x: bigint, P: bigint): bigint {
+  const b2 = (x * x * x) % P;
+  const b3 = (b2 * b2 * x) % P;
+  const b6 = (powMod(b3, 3, P) * b3) % P;
+  const b9 = (powMod(b6, 3, P) * b3) % P;
+  const b11 = (powMod(b9, 2, P) * b2) % P;
+  const b22 = (powMod(b11, 11, P) * b11) % P;
+  const b44 = (powMod(b22, 22, P) * b22) % P;
+  const b88 = (powMod(b44, 44, P) * b44) % P;
+  const b176 = (powMod(b88, 88, P) * b88) % P;
+  const b220 = (powMod(b176, 44, P) * b44) % P;
+  const b223 = (powMod(b220, 3, P) * b3) % P;
+  const t1 = (powMod(b223, 23, P) * b22) % P;
+  const t2 = (powMod(t1, 6, P) * b2) % P;
+  const root = powMod(t2, 2, P);
+  return root;
+}
+
+const curveP = BigInt(`0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F`);
+
+/**
+ * This function tells whether the point given is a DER encoded point on the ECDSA curve.
+ * @param {string} pointHex The point as a hex string (*must not* include a '0x' prefix)
+ * @returns {boolean} true if the point is on the SECP256K1 curve
+ */
+export function isPoint(pointHex: string): boolean {
+  if (!pointHex?.length) {
+    return false;
+  }
+  if (
+    !(
+      // is uncompressed
+      (
+        (pointHex.length === 130 && pointHex.startsWith('04')) ||
+        // OR is compressed
+        (pointHex.length === 66 &&
+          (pointHex.startsWith('02') || pointHex.startsWith('03')))
+      )
+    )
+  ) {
+    return false;
+  }
+
+  // Function modified slightly from noble-curves
+  
+
+  // Now we know that pointHex is a 33 or 65 byte hex string.
+  const isCompressed = pointHex.length === 66;
+
+  const x = BigInt(`0x${pointHex.slice(2, 66)}`);
+  if (x >= curveP) {
+    return false;
+  }
+
+  if (!isCompressed) {
+    const y = BigInt(`0x${pointHex.slice(66, 130)}`);
+    if (y >= curveP) {
+      return false;
+    }
+    // Just check y^2 = x^3 + 7 (secp256k1 curve)
+    return (y * y) % curveP === (x * x * x + 7n) % curveP;
+  } else {
+    // Get unaltered y^2 (no mod p)
+    const ySquared = (x * x * x + 7n) % curveP;
+    // Try to sqrt it, it will round down if not perfect root
+    const y = sqrtMod(ySquared, curveP);
+    // If we square and it's equal, then it was a perfect root and valid point.
+    return (y * y) % curveP === ySquared;
+  }
+}

contributors/0xBEEFCAF3.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of November 17, 2023.
+
+Signed: 0xBEEFCAF3

contributors/afahrer.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of January 23, 2024.
+
+Signed: afahrer

contributors/fanquake.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of October 23, 2023.
+
+Signed: fanquake

contributors/isghe.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of January 18, 2024.
+
+Signed: isghe

contributors/jamesblacklock.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of December 20, 2023.
+
+Signed: jamesblacklock

contributors/natsoni.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of November 16, 2023.
+
+Signed: natsoni

contributors/russeree.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of March 8, 2024.
+
+Signed: PortlandHODL

contributors/shubhamkmr04.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of November 15, 2023.
+
+Signed: shubhamkmr04

contributors/starius.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of Oct 13, 2023.
+
+Signed starius

contributors/takuabonn.txt

@@ -0,0 +1,3 @@
+I hereby accept the terms of the Contributor License Agreement in the CONTRIBUTING.md file of the mempool/mempool git repository as of December 13, 2023.
+
+Signed: takuabonn

docker/README.md

@@ -109,8 +109,6 @@ Below we list all settings from `mempool-config.json` and the corresponding over
     "AUTOMATIC_BLOCK_REINDEXING": false,
     "POOLS_JSON_URL": "https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json",
     "POOLS_JSON_TREE_URL": "https://api.github.com/repos/mempool/mining-pools/git/trees/master",
-    "ADVANCED_GBT_AUDIT": false,
-    "ADVANCED_GBT_MEMPOOL": false,
     "CPFP_INDEXING": false,
     "MAX_BLOCKS_BULK_QUERY": 0,
     "DISK_CACHE_BLOCK_INTERVAL": 6,
@@ -124,7 +122,7 @@ Corresponding `docker-compose.yml` overrides:
     environment:
       MEMPOOL_NETWORK: ""
       MEMPOOL_BACKEND: ""
-      MEMPOOL_HTTP_PORT: ""
+      BACKEND_HTTP_PORT: ""
       MEMPOOL_SPAWN_CLUSTER_PROCS: ""
       MEMPOOL_API_URL_PREFIX: ""
       MEMPOOL_POLL_RATE_MS: ""
@@ -142,8 +140,6 @@ Corresponding `docker-compose.yml` overrides:
       MEMPOOL_AUTOMATIC_BLOCK_REINDEXING: ""
       MEMPOOL_POOLS_JSON_URL: ""
       MEMPOOL_POOLS_JSON_TREE_URL: ""
-      MEMPOOL_ADVANCED_GBT_AUDIT: ""
-      MEMPOOL_ADVANCED_GBT_MEMPOOL: ""
       MEMPOOL_CPFP_INDEXING: ""
       MEMPOOL_MAX_BLOCKS_BULK_QUERY: ""
       MEMPOOL_DISK_CACHE_BLOCK_INTERVAL: ""
@@ -151,8 +147,6 @@ Corresponding `docker-compose.yml` overrides:
       ...
 ```
 
-`ADVANCED_GBT_AUDIT` AND `ADVANCED_GBT_MEMPOOL` enable a more accurate (but slower) block prediction algorithm for the block audit feature and the projected mempool-blocks respectively.
-
 `CPFP_INDEXING` enables indexing CPFP (Child Pays For Parent) information for the last `INDEXING_BLOCKS_AMOUNT` blocks.
 
 <br/>
@@ -164,7 +158,9 @@ Corresponding `docker-compose.yml` overrides:
     "PORT": 8332,
     "USERNAME": "mempool",
     "PASSWORD": "mempool",
-    "TIMEOUT": 60000
+    "TIMEOUT": 60000,
+    "COOKIE": false,
+    "COOKIE_PATH": ""
   },
 ```
 
@@ -177,6 +173,8 @@ Corresponding `docker-compose.yml` overrides:
       CORE_RPC_USERNAME: ""
       CORE_RPC_PASSWORD: ""
       CORE_RPC_TIMEOUT: 60000
+      CORE_RPC_COOKIE: false
+      CORE_RPC_COOKIE_PATH: ""
       ...
 ```
 
@@ -231,7 +229,9 @@ Corresponding `docker-compose.yml` overrides:
     "PORT": 8332,
     "USERNAME": "mempool",
     "PASSWORD": "mempool",
-    "TIMEOUT": 60000
+    "TIMEOUT": 60000,
+    "COOKIE": false,
+    "COOKIE_PATH": ""
   },
 ```
 
@@ -244,6 +244,8 @@ Corresponding `docker-compose.yml` overrides:
       SECOND_CORE_RPC_USERNAME: ""
       SECOND_CORE_RPC_PASSWORD: ""
       SECOND_CORE_RPC_TIMEOUT: ""
+      SECOND_CORE_RPC_COOKIE: false
+      SECOND_CORE_RPC_COOKIE_PATH: ""
       ...
 ```
 
@@ -321,25 +323,6 @@ Corresponding `docker-compose.yml` overrides:
 
 <br/>
 
-`mempool-config.json`:
-```json
-  "BISQ": {
-    "ENABLED": false,
-    "DATA_PATH": "/bisq/statsnode-data/btc_mainnet/db"
-  }
-```
-
-Corresponding `docker-compose.yml` overrides:
-```yaml
-  api:
-    environment:
-      BISQ_ENABLED: ""
-      BISQ_DATA_PATH: ""
-      ...
-```
-
-<br/>
-
 `mempool-config.json`:
 ```json
   "SOCKS5PROXY": {