e2e accelerations

Bump esbuild from 0.23.0 to 0.24.0 in /frontend

LICENSE

@@ -1,5 +1,5 @@
 The Mempool Open Source Project®
-Copyright (c) 2019-2023 Mempool Space K.K. and other shadowy super-coders
+Copyright (c) 2019-2024 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 the GNU Affero General Public License as published by the Free
@@ -12,10 +12,12 @@ or any other contributor to The Mempool Open Source Project.
 
 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, 
+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 
+the mempool block visualization Logo, the mempool Blocks Logo, the mempool 
-Logo, and the mempool.space Horizontal logo are registered trademarks or trademarks 
+transaction Logo, the mempool Blocks 3 | 2 Logo, the mempool research Logo, 
-of Mempool Space K.K in Japan, the United States, and/or other countries.
+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.
 
 See our full Trademark Policy and Guidelines for more details, published on 
 <https://mempool.space/trademark-policy>.

backend/.eslintrc

@@ -34,6 +34,7 @@
     "quotes": [1, "single", { "allowTemplateLiterals": true }],
     "semi": 1,
     "curly": [1, "all"],
-    "eqeqeq": 1
+    "eqeqeq": 1,
+    "no-trailing-spaces": 1
   }
 }

backend/README.md

@@ -77,7 +77,7 @@ Query OK, 0 rows affected (0.00 sec)
 
 #### Build
 
-_Make sure to use Node.js 16.10 and npm 7._
+_Make sure to use Node.js 20.x and npm 9.x or newer_
 
 _The build process requires [Rust](https://www.rust-lang.org/tools/install) to be installed._
 
@@ -181,7 +181,7 @@ Create a new wallet, if needed:
    bitcoin-cli -regtest createwallet test
    ```
 
-Load wallet (this command may take a while if you have lot of UTXOs):
+Load wallet (this command may take a while if you have a lot of UTXOs):
    ```
    bitcoin-cli -regtest loadwallet test
    ```
@@ -229,13 +229,13 @@ Generate block at regular interval (every 10 seconds in this example):
 
 ### Mining pools update
 
-By default, mining pools will be not automatically updated regularly (`config.MEMPOOL.AUTOMATIC_BLOCK_REINDEXING` is set to `false`). 
+By default, mining pools will be not automatically updated regularly (`config.MEMPOOL.AUTOMATIC_POOLS_UPDATE` is set to `false`). 
 
 To manually update your mining pools, you can use the `--update-pools` command line flag when you run the nodejs backend. For example `npm run start --update-pools`. This will trigger the mining pools update and automatically re-index appropriate blocks.
 
-You can enabled the automatic mining pools update by settings `config.MEMPOOL.AUTOMATIC_BLOCK_REINDEXING` to `true` in your `mempool-config.json`.
+You can enable the automatic mining pools update by settings `config.MEMPOOL.AUTOMATIC_POOLS_UPDATE` to `true` in your `mempool-config.json`.
 
-When a `coinbase tag` or `coinbase address` change is detected, all blocks tagged to the `unknown` mining pools (starting from height 130635) will be deleted from the `blocks` table. Additionaly, all blocks which were tagged to the pool which has been updated will also be deleted from the `blocks` table. Of course, those blocks will be automatically reindexed.
+When a `coinbase tag` or `coinbase address` change is detected, pool assignments for all relevant blocks (tagged to that pool or the `unknown` mining pool, starting from height 130635) are updated using the new criteria.
 
 ### Re-index tables
 

backend/mempool-config.sample.json

@@ -24,7 +24,7 @@
     "EXTERNAL_RETRY_INTERVAL": 0,
     "USER_AGENT": "mempool",
     "STDOUT_LOG_MIN_PRIORITY": "debug",
-    "AUTOMATIC_BLOCK_REINDEXING": false,
+    "AUTOMATIC_POOLS_UPDATE": 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",
     "AUDIT": false,
@@ -59,7 +59,8 @@
     "RETRY_UNIX_SOCKET_AFTER": 30000,
     "REQUEST_TIMEOUT": 10000,
     "FALLBACK_TIMEOUT": 5000,
-    "FALLBACK": []
+    "FALLBACK": [],
+    "MAX_BEHIND_TIP": 2
   },
   "SECOND_CORE_RPC": {
     "HOST": "127.0.0.1",

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mempool-backend",
-  "version": "3.0.0-dev",
+  "version": "3.1.0-dev",
   "description": "Bitcoin mempool visualizer and blockchain explorer backend",
   "license": "GNU Affero General Public License v3.0",
   "homepage": "https://mempool.space",
@@ -39,24 +39,24 @@
     "prettier": "./node_modules/.bin/prettier --write \"src/**/*.{js,ts}\""
   },
   "dependencies": {
-    "@babel/core": "^7.24.0",
+    "@babel/core": "^7.25.2",
     "@mempool/electrum-client": "1.1.9",
     "@types/node": "^18.15.3",
-    "axios": "~1.7.2",
+    "axios": "1.7.2",
     "bitcoinjs-lib": "~6.1.3",
     "crypto-js": "~4.2.0",
-    "express": "~4.19.2",
+    "express": "~4.21.0",
     "maxmind": "~4.3.11",
-    "mysql2": "~3.9.7",
+    "mysql2": "~3.11.0",
     "rust-gbt": "file:./rust-gbt",
-    "redis": "^4.6.6",
+    "redis": "^4.7.0",
     "socks-proxy-agent": "~7.0.0",
     "typescript": "~4.9.3",
-    "ws": "~8.17.0"
+    "ws": "~8.18.0"
   },
   "devDependencies": {
     "@babel/code-frame": "^7.18.6",
-    "@babel/core": "^7.24.0",
+    "@babel/core": "^7.25.2",
     "@types/compression": "^1.7.2",
     "@types/crypto-js": "^4.1.1",
     "@types/express": "^4.17.17",

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

@@ -10,7 +10,7 @@
     "UNIX_SOCKET_PATH": "/mempool/socket/mempool-bitcoin-mainnet",
     "SPAWN_CLUSTER_PROCS": 2,
     "API_URL_PREFIX": "__MEMPOOL_API_URL_PREFIX__",
-    "AUTOMATIC_BLOCK_REINDEXING": false,
+    "AUTOMATIC_POOLS_UPDATE": false,
     "POLL_RATE_MS": 3,
     "CACHE_DIR": "__MEMPOOL_CACHE_DIR__",
     "CACHE_ENABLED": true,
@@ -60,7 +60,8 @@
     "RETRY_UNIX_SOCKET_AFTER": 888,
     "REQUEST_TIMEOUT": 10000,
     "FALLBACK_TIMEOUT": 5000,
-    "FALLBACK": []
+    "FALLBACK": [],
+    "MAX_BEHIND_TIP": 2
   },
   "SECOND_CORE_RPC": {
     "HOST": "__SECOND_CORE_RPC_HOST__",

backend/src/__tests__/api/common.ts

@@ -1,24 +1,40 @@
 import { Common } from '../../api/common';
-import { MempoolTransactionExtended } from '../../mempool.interfaces';
+import { MempoolTransactionExtended, TransactionExtended } from '../../mempool.interfaces';
 
 const randomTransactions = require('./test-data/transactions-random.json');
 const replacedTransactions = require('./test-data/transactions-replaced.json');
 const rbfTransactions = require('./test-data/transactions-rbfs.json');
+const nonStandardTransactions = require('./test-data/non-standard-txs.json');
 
-describe('Mempool Utils', () => {
+describe('Common', () => {
-  test('should detect RBF transactions with fast method', () => {
+  describe('RBF', () => {
     const newTransactions = rbfTransactions.concat(randomTransactions);
-    const result: { [txid: string]: MempoolTransactionExtended[] } = Common.findRbfTransactions(newTransactions, replacedTransactions);
+    test('should detect RBF transactions with fast method', () => {
-    expect(Object.values(result).length).toEqual(2);
+      const result: { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }} = Common.findRbfTransactions(newTransactions, replacedTransactions);
-    expect(result).toHaveProperty('7219d95161f3718335991ac6d967d24eedec370908c9879bb1e192e6d797d0a6');
+      expect(Object.values(result).length).toEqual(2);
-    expect(result).toHaveProperty('5387881d695d4564d397026dc5f740f816f8390b4b2c5ec8c20309122712a875');
+      expect(result).toHaveProperty('7219d95161f3718335991ac6d967d24eedec370908c9879bb1e192e6d797d0a6');
+      expect(result).toHaveProperty('5387881d695d4564d397026dc5f740f816f8390b4b2c5ec8c20309122712a875');
+    });
+
+    test('should detect RBF transactions with scalable method', () => {
+      const result: { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }} = Common.findRbfTransactions(newTransactions, replacedTransactions, true);
+      expect(Object.values(result).length).toEqual(2);
+      expect(result).toHaveProperty('7219d95161f3718335991ac6d967d24eedec370908c9879bb1e192e6d797d0a6');
+      expect(result).toHaveProperty('5387881d695d4564d397026dc5f740f816f8390b4b2c5ec8c20309122712a875');
+    });
   });
 
-  test.only('should detect RBF transactions with scalable method', () => {
+  describe('Mempool Goggles', () => {
-    const newTransactions = rbfTransactions.concat(randomTransactions);
+    test('should detect nonstandard transactions', () => {
-    const result: { [txid: string]: MempoolTransactionExtended[] } = Common.findRbfTransactions(newTransactions, replacedTransactions, true);
+      nonStandardTransactions.forEach((tx) => {
-    expect(Object.values(result).length).toEqual(2);
+        expect(Common.isNonStandard(tx)).toEqual(true);
-    expect(result).toHaveProperty('7219d95161f3718335991ac6d967d24eedec370908c9879bb1e192e6d797d0a6');
+      });
-    expect(result).toHaveProperty('5387881d695d4564d397026dc5f740f816f8390b4b2c5ec8c20309122712a875');
+    });
+  
+    test('should not misclassify as nonstandard transactions', () => {
+      randomTransactions.forEach((tx) => {
+        expect(Common.isNonStandard(tx)).toEqual(false);
+      });
+    });
   });
 });

backend/src/__tests__/api/test-data/non-standard-txs.json

@@ -0,0 +1,52 @@
+[
+  {
+    "txid": "50136231cb7eeeffb17fc41d1cca213426abe5bf3760e3d6421cad0c0edad367",
+    "version": 1,
+    "locktime": 0,
+    "vin": [
+        {
+            "txid": "c7f86fb7b830124057475b282809f3474ef3565daa3de0b599980fb9e84ab019",
+            "vout": 4217,
+            "prevout": {
+                "scriptpubkey": "001466197b5eadd8067ec194a457e1044b6d1fbdd3b3",
+                "scriptpubkey_asm": "OP_0 OP_PUSHBYTES_20 66197b5eadd8067ec194a457e1044b6d1fbdd3b3",
+                "scriptpubkey_type": "v0_p2wpkh",
+                "scriptpubkey_address": "bc1qvcvhkh4dmqr8asv553t7zpztd50mm5ang4na33",
+                "value": 106
+            },
+            "scriptsig": "",
+            "scriptsig_asm": "",
+            "witness": [
+                "3043021f2af6060a142c6cfd7428adad6a50745d2424813d7ced5c0bbcca85e70de1be022021440ca1c8c3ed49ecd1b64dca6911adcd430c5d3dd60d77ffe0072953999f5b01",
+                "02ead5c34e3d2c506574b562f857576e11380b6ba15d9f0ad7b7303fdaa9c1513d"
+            ],
+            "is_coinbase": false,
+            "sequence": 4294967295
+        }
+    ],
+    "vout": [
+        {
+            "scriptpubkey": "6a023a29",
+            "scriptpubkey_asm": "OP_RETURN OP_PUSHBYTES_2 3a29",
+            "scriptpubkey_type": "op_return",
+            "value": 0
+        },
+        {
+            "scriptpubkey": "6a036d7648",
+            "scriptpubkey_asm": "OP_RETURN OP_PUSHBYTES_3 6d7648",
+            "scriptpubkey_type": "op_return",
+            "value": 0
+        }
+    ],
+    "size": 186,
+    "weight": 420,
+    "sigops": 1,
+    "fee": 106,
+    "status": {
+        "confirmed": true,
+        "block_height": 836361,
+        "block_hash": "0000000000000000000341cc26cda4af82cd25f7063c448772228cbf2836915b",
+        "block_time": 1711448028
+    }
+  }
+]

backend/src/__tests__/api/test-data/transactions-random.json

@@ -273,5 +273,328 @@
         },
         "bestDescendant": null,
         "cpfpChecked": true
+    },
+    {
+        "txid": "20b984492b5264162a4c92c9a34bc7fa08b67d669de7b4c5982ad3cb28aaecf6",
+        "version": 2,
+        "locktime": 0,
+        "vin": [
+            {
+                "txid": "3adda6afd547193793c248e667c2b7dbf26d705003de65e3a25e5be698286aef",
+                "vout": 2,
+                "prevout": {
+                    "scriptpubkey": "0014989cf12774fc705609610c7b9419f2d1c4807644",
+                    "scriptpubkey_asm": "OP_0 OP_PUSHBYTES_20 989cf12774fc705609610c7b9419f2d1c4807644",
+                    "scriptpubkey_type": "v0_p2wpkh",
+                    "scriptpubkey_address": "bc1qnzw0zfm5l3c9vztpp3aegx0j68zgqajyffr2r6",
+                    "value": 27619
+                },
+                "scriptsig": "",
+                "scriptsig_asm": "",
+                "witness": [
+                    "304402205d7f1e0d928982645c2bcc4c730c4545c382d6520c2a14eebc71594702cd06b302200511d452ce51c79017536f50acb115eefe7c04506ad12b9307d2b5d56b999beb01",
+                    "03716cb4f0430fe69c596a12c6680c55803150645989b406772838d548cde7cca5"
+                ],
+                "is_coinbase": false,
+                "sequence": 4294967295
+            }
+        ],
+        "vout": [
+            {
+                "scriptpubkey": "6a5d0614c0a2331441",
+                "scriptpubkey_asm": "OP_RETURN OP_PUSHNUM_13 OP_PUSHBYTES_6 14c0a2331441",
+                "scriptpubkey_type": "op_return",
+                "value": 0
+            },
+            {
+                "scriptpubkey": "5114d71c6c3ea7ba7e6ee477a0bfd82c20c78997882c",
+                "scriptpubkey_asm": "OP_PUSHNUM_1 OP_PUSHBYTES_20 d71c6c3ea7ba7e6ee477a0bfd82c20c78997882c",
+                "scriptpubkey_type": "unknown",
+                "scriptpubkey_address": "bc1p6uwxc048hflxaerh5zlastpqc7ye0zpvq7gq2a",
+                "value": 546
+            },
+            {
+                "scriptpubkey": "0014989cf12774fc705609610c7b9419f2d1c4807644",
+                "scriptpubkey_asm": "OP_0 OP_PUSHBYTES_20 989cf12774fc705609610c7b9419f2d1c4807644",
+                "scriptpubkey_type": "v0_p2wpkh",
+                "scriptpubkey_address": "bc1qnzw0zfm5l3c9vztpp3aegx0j68zgqajyffr2r6",
+                "value": 23073
+            }
+        ],
+        "size": 240,
+        "weight": 633,
+        "sigops": 1,
+        "fee": 4000,
+        "status": {
+            "confirmed": true,
+            "block_height": 848136,
+            "block_hash": "00000000000000000002c69c7a3010fcd596c0c7451c23e7cd1f5e19ebf8ee6d",
+            "block_time": 1718517071
+        }
+    },
+    {
+        "txid": "b10c0000004da5a9d1d9b4ae32e09f0b3e62d21a5cce5428d4ad714fb444eb5d",
+        "version": 1,
+        "locktime": 1231006505,
+        "vin": [
+            {
+                "txid": "d46a24962c1d7bd6e87d80570c6a53413eaf30d7fde7f52347f13645ae53969b",
+                "vout": 0,
+                "prevout": {
+                    "scriptpubkey": "41049434a2dd7c5b82df88f578f8d7fd14e8d36513aaa9c003eb5bd6cb56065e44b7e0227139e8a8e68e7de0a4ed32b8c90edc9673b8a7ea541b52f2a22196f7b8cfac",
+                    "scriptpubkey_asm": "OP_PUSHBYTES_65 049434a2dd7c5b82df88f578f8d7fd14e8d36513aaa9c003eb5bd6cb56065e44b7e0227139e8a8e68e7de0a4ed32b8c90edc9673b8a7ea541b52f2a22196f7b8cf OP_CHECKSIG",
+                    "scriptpubkey_type": "p2pk",
+                    "value": 6102
+                },
+                "scriptsig": "473044022004f027ae0b19bb7a7aa8fcdf135f1da769d087342020359ef4099a9f0f0ba4ec02206a83a9b78df3fed89a3b6052e69963e1fb08d8f6d17d945e43b51b5214aa41e601",
+                "scriptsig_asm": "OP_PUSHBYTES_71 3044022004f027ae0b19bb7a7aa8fcdf135f1da769d087342020359ef4099a9f0f0ba4ec02206a83a9b78df3fed89a3b6052e69963e1fb08d8f6d17d945e43b51b5214aa41e601",
+                "is_coinbase": false,
+                "sequence": 20090103
+            },
+            {
+                "txid": "cb9b47ac04023b29fb633a8ef04af351ac9fd74c57c9a2163f683516274767e3",
+                "vout": 0,
+                "prevout": {
+                    "scriptpubkey": "76a914bbb1f7d0f7e15ac088af9bafe25aaac1a59832d088ac",
+                    "scriptpubkey_asm": "OP_DUP OP_HASH160 OP_PUSHBYTES_20 bbb1f7d0f7e15ac088af9bafe25aaac1a59832d0 OP_EQUALVERIFY OP_CHECKSIG",
+                    "scriptpubkey_type": "p2pkh",
+                    "scriptpubkey_address": "1J7SZJry7CX4zWdH3P8E8UJjZrhcLEjJ39",
+                    "value": 1913
+                },
+                "scriptsig": "46304302204dc2939be89ab6626457fff40aec2cc4e6213e64bcb4d2c43bf6b49358ff638c021f33d2f8fdf6d54a2c82bb7cddc62becc2cbbaca6fd7f3ec927ea975f29ad8510221028b98707adfd6f468d56c1a6067a6f0c7fef43afbacad45384017f8be93a18d40",
+                "scriptsig_asm": "OP_PUSHBYTES_70 304302204dc2939be89ab6626457fff40aec2cc4e6213e64bcb4d2c43bf6b49358ff638c021f33d2f8fdf6d54a2c82bb7cddc62becc2cbbaca6fd7f3ec927ea975f29ad85102 OP_PUSHBYTES_33 028b98707adfd6f468d56c1a6067a6f0c7fef43afbacad45384017f8be93a18d40",
+                "is_coinbase": false,
+                "sequence": 20081031
+            },
+            {
+                "txid": "cb9b47ac04023b29fb633a8ef04af351ac9fd74c57c9a2163f683516274767e3",
+                "vout": 1,
+                "prevout": {
+                    "scriptpubkey": "52210304e708d258a632ffb128a62ecf5eebd1904e505497d031619513afc8bca7858f2102b9dc03f1133e7cbc7eb311631acc2dbda908fb0f0fae095da2f4dd427f51308a4104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f53ae",
+                    "scriptpubkey_asm": "OP_PUSHNUM_2 OP_PUSHBYTES_33 0304e708d258a632ffb128a62ecf5eebd1904e505497d031619513afc8bca7858f OP_PUSHBYTES_33 02b9dc03f1133e7cbc7eb311631acc2dbda908fb0f0fae095da2f4dd427f51308a OP_PUSHBYTES_65 04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f OP_PUSHNUM_3 OP_CHECKMULTISIG",
+                    "scriptpubkey_type": "multisig",
+                    "value": 1971
+                },
+                "scriptsig": "00453042021e4f6ff73d7b304a5cbf3bb7738abb5f81a4af6335962134ce27a1cc45fec702201b95e3acb7db93257b20651cdcb79af66bf0bb86a8ae5b4e0a5df4e3f86787e2033b303802153b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63021f34793e2878497561e7616291ebdda3024b681cdacc8b863b5b0804cd30c2a481",
+                "scriptsig_asm": "OP_0 OP_PUSHBYTES_69 3042021e4f6ff73d7b304a5cbf3bb7738abb5f81a4af6335962134ce27a1cc45fec702201b95e3acb7db93257b20651cdcb79af66bf0bb86a8ae5b4e0a5df4e3f86787e203 OP_PUSHBYTES_59 303802153b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63021f34793e2878497561e7616291ebdda3024b681cdacc8b863b5b0804cd30c2a481",
+                "is_coinbase": false,
+                "sequence": 19750504
+            },
+            {
+                "txid": "45e1cb33599acb071810ccc801b71bd7610865f5b899492946ab1bfbcb61cad6",
+                "vout": 0,
+                "prevout": {
+                    "scriptpubkey": "a91419f0b86f61606c6eb51b217698ca7e8bff1e398b87",
+                    "scriptpubkey_asm": "OP_HASH160 OP_PUSHBYTES_20 19f0b86f61606c6eb51b217698ca7e8bff1e398b OP_EQUAL",
+                    "scriptpubkey_type": "p2sh",
+                    "scriptpubkey_address": "344BBtYkhaCXgA7oYSXASUfh4bFieiponG",
+                    "value": 2140
+                },
+                "scriptsig": "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",
+                "scriptsig_asm": "OP_0 OP_PUSHBYTES_68 3041021d1313459a48bd1d0628eec635495f793e970729684394f9b814d2b24012022050be6d9918444e283da0136884f8311ec465d0fed2f8d24b75a8485ebdc13aea01 OP_PUSHBYTES_58 303702153b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63021e78644ba72eab69fefb5fe50700671bfb91dda699f72ffbb325edc6a3c4ef82 OP_PUSHBYTES_57 303602153b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63021d2c2db104e70720c39af43b6ba3edd930c26e0818aa59ff9c886281d8ba83 OP_PUSHDATA1 532103e0a220d36f6f7ed5f3f58c279d055707c454135baf18fd00d798fec3cb52dfbc2103cf689db9313b9f7fc0b984dd9cac750be76041b392919b06f6bf94813da34cd421027f8af2eb6e904deddaa60d5af393d430575eb35e4dfd942a8a5882734b078906410411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a34104ae1a62fe09c5f51b13905f07f06b99a2f7159b2225f374cd378d71302fa28414e7aab37397f554a7df5f142c21c1b7303b8a0626f1baded5c72a704f7e6cd84c55ae",
+                "is_coinbase": false,
+                "sequence": 16,
+                "inner_redeemscript_asm": "OP_PUSHNUM_3 OP_PUSHBYTES_33 03e0a220d36f6f7ed5f3f58c279d055707c454135baf18fd00d798fec3cb52dfbc OP_PUSHBYTES_33 03cf689db9313b9f7fc0b984dd9cac750be76041b392919b06f6bf94813da34cd4 OP_PUSHBYTES_33 027f8af2eb6e904deddaa60d5af393d430575eb35e4dfd942a8a5882734b078906 OP_PUSHBYTES_65 0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3 OP_PUSHBYTES_65 04ae1a62fe09c5f51b13905f07f06b99a2f7159b2225f374cd378d71302fa28414e7aab37397f554a7df5f142c21c1b7303b8a0626f1baded5c72a704f7e6cd84c OP_PUSHNUM_5 OP_CHECKMULTISIG"
+            },
+            {
+                "txid": "cb9b47ac04023b29fb633a8ef04af351ac9fd74c57c9a2163f683516274767e3",
+                "vout": 2,
+                "prevout": {
+                    "scriptpubkey": "a9143b13a1f71c20c799d86bb624b3898c826d6c82da87",
+                    "scriptpubkey_asm": "OP_HASH160 OP_PUSHBYTES_20 3b13a1f71c20c799d86bb624b3898c826d6c82da OP_EQUAL",
+                    "scriptpubkey_type": "p2sh",
+                    "scriptpubkey_address": "375PJxsKRtAq4WoS6u82jvgZW94R8Wx3iH",
+                    "value": 5139
+                },
+                "scriptsig": "1600149b27f072e4b972927c445d1946162a550b0914d8",
+                "scriptsig_asm": "OP_PUSHBYTES_22 00149b27f072e4b972927c445d1946162a550b0914d8",
+                "witness": [
+                    "3040021c23902a01d4c5cff2c33c8bdb778a5aadea78a9a0d6d4db60aaa0fba1022069237d9dbf2db8cff9c260ba71250493682d01a746f4a45c5c7ea386e56d2bc902",
+                    "0240187acd3e2fd3d8e1acffefa85907b6550730c24f78dfd3301c829fc4daf3cc"
+                ],
+                "is_coinbase": false,
+                "sequence": 141,
+                "inner_redeemscript_asm": "OP_0 OP_PUSHBYTES_20 9b27f072e4b972927c445d1946162a550b0914d8"
+            },
+            {
+                "txid": "cb9b47ac04023b29fb633a8ef04af351ac9fd74c57c9a2163f683516274767e3",
+                "vout": 3,
+                "prevout": {
+                    "scriptpubkey": "a914a3c0698f2300c7b2e8107d4c9c988e642110039087",
+                    "scriptpubkey_asm": "OP_HASH160 OP_PUSHBYTES_20 a3c0698f2300c7b2e8107d4c9c988e6421100390 OP_EQUAL",
+                    "scriptpubkey_type": "p2sh",
+                    "scriptpubkey_address": "3GcrZrbUuvE4UtUdSbKTXcRnTqmfMdyMAC",
+                    "value": 3220
+                },
+                "scriptsig": "220020a18160de7291554f349c7d5cbee4ab97fb542e94cf302ce8d7e9747e4188ca75",
+                "scriptsig_asm": "OP_PUSHBYTES_34 0020a18160de7291554f349c7d5cbee4ab97fb542e94cf302ce8d7e9747e4188ca75",
+                "witness": [
+                    "303f021c65aee6696e80be6e14545cfd64b44f17b0514c150eefdb090c0f0bd9021f3fef4aa95c252a225622aba99e4d5af5a6fe40d177acd593e64cf2f8557ccc03",
+                    "03b55c6f0749e0f3e2caeca05f68e3699f1b3c62a550730f704985a6a9aae437a1",
+                    "76a914db865fd920959506111079995f1e4017b489bfe38763ac6721024d560f7f5d28aae5e1a8aa2b7ba615d7fc48e4ea27e5d27336e6a8f5fa0f5c8c7c820120876475527c2103443e8834fa7d79d7b5e95e0e9d0847f6b03ac3ea977979858b4104947fca87ca52ae67a91446c3747322b220fdb925c9802f0e949c1feab99988ac6868"
+                ],
+                "is_coinbase": false,
+                "sequence": 3735928559,
+                "inner_redeemscript_asm": "OP_0 OP_PUSHBYTES_32 a18160de7291554f349c7d5cbee4ab97fb542e94cf302ce8d7e9747e4188ca75",
+                "inner_witnessscript_asm": "OP_DUP OP_HASH160 OP_PUSHBYTES_20 db865fd920959506111079995f1e4017b489bfe3 OP_EQUAL OP_IF OP_CHECKSIG OP_ELSE OP_PUSHBYTES_33 024d560f7f5d28aae5e1a8aa2b7ba615d7fc48e4ea27e5d27336e6a8f5fa0f5c8c OP_SWAP OP_SIZE OP_PUSHBYTES_1 20 OP_EQUAL OP_NOTIF OP_DROP OP_PUSHNUM_2 OP_SWAP OP_PUSHBYTES_33 03443e8834fa7d79d7b5e95e0e9d0847f6b03ac3ea977979858b4104947fca87ca OP_PUSHNUM_2 OP_CHECKMULTISIG OP_ELSE OP_HASH160 OP_PUSHBYTES_20 46c3747322b220fdb925c9802f0e949c1feab999 OP_EQUALVERIFY OP_CHECKSIG OP_ENDIF OP_ENDIF"
+            },
+            {
+                "txid": "cb9b47ac04023b29fb633a8ef04af351ac9fd74c57c9a2163f683516274767e3",
+                "vout": 4,
+                "prevout": {
+                    "scriptpubkey": "0014c0ca6e754e65d3ba59112d7abc33e500c00ecfa7",
+                    "scriptpubkey_asm": "OP_0 OP_PUSHBYTES_20 c0ca6e754e65d3ba59112d7abc33e500c00ecfa7",
+                    "scriptpubkey_type": "v0_p2wpkh",
+                    "scriptpubkey_address": "bc1qcr9xua2wvhfm5kg394atcvl9qrqqana8rrmy8h",
+                    "value": 17144
+                },
+                "scriptsig": "",
+                "scriptsig_asm": "",
+                "witness": [
+                    "303e021c11f60486afd0f5d6573603fb2076ef2f676455b92ada257d2f25558a021e317719c946f951d49bf4df4285a618629cd9e554fcbf787c319a0c4dd22601",
+                    "032467f24cc31664f0cf34ff8d5cbb590888ddc1dcfec724a32ae3dd5338b8508e"
+                ],
+                "is_coinbase": false,
+                "sequence": 21000000
+            },
+            {
+                "txid": "637db3928a8fb1b22b81f92dc738ee7637e5b172d650363d0b327429578bd001",
+                "vout": 0,
+                "prevout": {
+                    "scriptpubkey": "0020a9530a167fcada672c142ee636dcd171796e69ef8e37aa1f77f35c58edd7a357",
+                    "scriptpubkey_asm": "OP_0 OP_PUSHBYTES_32 a9530a167fcada672c142ee636dcd171796e69ef8e37aa1f77f35c58edd7a357",
+                    "scriptpubkey_type": "v0_p2wsh",
+                    "scriptpubkey_address": "bc1q49fs59nletdxwtq59mnrdhx3w9uku6003cm658mh7dw93mwh5dts2w2kht",
+                    "value": 8149
+                },
+                "scriptsig": "",
+                "scriptsig_asm": "",
+                "witness": [
+                    "303d021c32f9454db85cb1a4ca63a9883d4347c5e13f3654e884ae44e9efa3c8021d62f07fe452c06b084bc3e09afd3aac4039136549a465533bc1ca66967902",
+                    "01",
+                    "632102fd6db4de50399b2aa086edb23f8e140bbc823d6651e024a0eb871288068789cd67012ab27521034134a2bb35c3f83dab2489d96160741888b8b5589bb694dea6e7bc24486e9c6f68ac"
+                ],
+                "is_coinbase": false,
+                "sequence": 4190024921,
+                "inner_witnessscript_asm": "OP_IF OP_PUSHBYTES_33 02fd6db4de50399b2aa086edb23f8e140bbc823d6651e024a0eb871288068789cd OP_ELSE OP_PUSHBYTES_1 2a OP_CSV OP_DROP OP_PUSHBYTES_33 034134a2bb35c3f83dab2489d96160741888b8b5589bb694dea6e7bc24486e9c6f OP_ENDIF OP_CHECKSIG"
+            },
+            {
+                "txid": "0020db02df125062ebae5bacd189ebff22577b2817c1872be79a0d3ba3982c41",
+                "vout": 0,
+                "prevout": {
+                    "scriptpubkey": "512071212ded0ff4c9b1b0c505d8012772e2dbe98a3cae7168377b950fb6b866a849",
+                    "scriptpubkey_asm": "OP_PUSHNUM_1 OP_PUSHBYTES_32 71212ded0ff4c9b1b0c505d8012772e2dbe98a3cae7168377b950fb6b866a849",
+                    "scriptpubkey_type": "v1_p2tr",
+                    "scriptpubkey_address": "bc1pwysjmmg07nymrvx9qhvqzfmjutd7nz3u4ecksdmmj58mdwrx4pysq6m68g",
+                    "value": 9001
+                },
+                "scriptsig": "",
+                "scriptsig_asm": "",
+                "witness": [
+                    "d822f203827852998cad370232e8c57294540a5da51107fa26cf466bdd2b8b0b3d161999cc80aed8de7386a2bd5d5313aea159a231cc26fa53aaa702b7fa21ed"
+                ],
+                "is_coinbase": false,
+                "sequence": 341
+            },
+            {
+                "txid": "795741ecf9c431b14b1c8d2dd017d3978fd4f6452e91edf416f31ef9971206b4",
+                "vout": 0,
+                "prevout": {
+                    "scriptpubkey": "512089ac120a490eee88db5588112f95f88093284c814f07c3ad943a7faefba2271a",
+                    "scriptpubkey_asm": "OP_PUSHNUM_1 OP_PUSHBYTES_32 89ac120a490eee88db5588112f95f88093284c814f07c3ad943a7faefba2271a",
+                    "scriptpubkey_type": "v1_p2tr",
+                    "scriptpubkey_address": "bc1p3xkpyzjfpmhg3k643qgjl90cszfjsnypfuru8tv58fl6a7azyudqkcu66k",
+                    "value": 19953
+                },
+                "scriptsig": "",
+                "scriptsig_asm": "",
+                "witness": [
+                    "fe6eb715dceffefc067fdc787d250a9a9116682d216f6356ea38fc1f112bd74995faa90315e81981d2c2260b7eaca3c41a16b280362980f0d8faf4c05ebb82c5",
+                    "e34ad0ad33885a473831f8ba8d9339123cb19d0e642e156d8e0d6e2ab2691aedb30e55a35637a806927225e1aa72223d41e59f92c6579b819e7d331a7ada9d2e01",
+                    "2a4861fb4cb951c791bf6c93859ef65abccd90034f91b9b77abb918e13b6fce75d5fa3e2d2f6eeeae105315178c2cb9db2ef238fe89b282f691c06db43bc71ca02",
+                    "fc97bb2be673c3bf388aaf58178ef14d354caf83c92aca8ef1831d619b8511e928f4f5fdea3962067b11e7cecfe094cd0f66a4ea9af9ec836d70d18f2b37df0281",
+                    "a5781a0adaa80ab7f7f164172dd1a1cb127e523daa0d6949aba074a15c589f12dfb8183182afec9230cb7947b7422a4abc1bb78173550d66274ea19f6c9dd92c82",
+                    "",
+                    "",
+                    "205f4237bd7dae576b34abc8a9c6fa4f0e4787c04234ca963e9e96c8f9b67b56d1ac205f4237bd7f93c69403a30c6b641f27ccf5201090152fcf1596474221307831c3ba205ac8ff25ce63564963d1148b84627f614af1f3c77d7caa23adc61264fa5e4996ba20b210c83e6f5b3f866837112d023d9ae8da2a6412168d54968ab87860ab970690ba20d3ee3b7a8b8149122b3c886330b3241538ba4b935c4040f4a73ddab917241bc5ba20cdfabb9d0e5c8f09a83f19e36e100d8f5e882f1b60aa60dacd9e6d072c117bc0ba20aab038c238e95fb54cdd0a6705dc1b1f8d135a9e9b20ab9c7ff96eef0e9bf545ba559c",
+                    "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"
+                ],
+                "is_coinbase": false,
+                "sequence": 342,
+                "inner_witnessscript_asm": "OP_PUSHBYTES_32 5f4237bd7dae576b34abc8a9c6fa4f0e4787c04234ca963e9e96c8f9b67b56d1 OP_CHECKSIG OP_PUSHBYTES_32 5f4237bd7f93c69403a30c6b641f27ccf5201090152fcf1596474221307831c3 OP_CHECKSIGADD OP_PUSHBYTES_32 5ac8ff25ce63564963d1148b84627f614af1f3c77d7caa23adc61264fa5e4996 OP_CHECKSIGADD OP_PUSHBYTES_32 b210c83e6f5b3f866837112d023d9ae8da2a6412168d54968ab87860ab970690 OP_CHECKSIGADD OP_PUSHBYTES_32 d3ee3b7a8b8149122b3c886330b3241538ba4b935c4040f4a73ddab917241bc5 OP_CHECKSIGADD OP_PUSHBYTES_32 cdfabb9d0e5c8f09a83f19e36e100d8f5e882f1b60aa60dacd9e6d072c117bc0 OP_CHECKSIGADD OP_PUSHBYTES_32 aab038c238e95fb54cdd0a6705dc1b1f8d135a9e9b20ab9c7ff96eef0e9bf545 OP_CHECKSIGADD OP_PUSHNUM_5 OP_NUMEQUAL"
+            }
+        ],
+        "vout": [
+            {
+                "scriptpubkey": "210261542eb020b36c1da48e2e607b90a8c1f2ccdbd06eaf5fb4bb0d7cc34293d32aac",
+                "scriptpubkey_asm": "OP_PUSHBYTES_33 0261542eb020b36c1da48e2e607b90a8c1f2ccdbd06eaf5fb4bb0d7cc34293d32a OP_CHECKSIG",
+                "scriptpubkey_type": "p2pk",
+                "value": 576
+            },
+            {
+                "scriptpubkey": "76a9140240539af6c68431e4ce9cc5ef464f12c1741b3c88ac",
+                "scriptpubkey_asm": "OP_DUP OP_HASH160 OP_PUSHBYTES_20 0240539af6c68431e4ce9cc5ef464f12c1741b3c OP_EQUALVERIFY OP_CHECKSIG",
+                "scriptpubkey_type": "p2pkh",
+                "scriptpubkey_address": "1CuQsdrcgcmPvugo3NqEwh1kDcpeEnuFC",
+                "value": 546
+            },
+            {
+                "scriptpubkey": "5121028b45a50f795be0413680036665d17a3eca099648ea80637bc3a70a7d2b52ae2851ae",
+                "scriptpubkey_asm": "OP_PUSHNUM_1 OP_PUSHBYTES_33 028b45a50f795be0413680036665d17a3eca099648ea80637bc3a70a7d2b52ae28 OP_PUSHNUM_1 OP_CHECKMULTISIG",
+                "scriptpubkey_type": "multisig",
+                "value": 582
+            },
+            {
+                "scriptpubkey": "a91449ed2c96e33b6134408af8484508bcc3248c8dbd87",
+                "scriptpubkey_asm": "OP_HASH160 OP_PUSHBYTES_20 49ed2c96e33b6134408af8484508bcc3248c8dbd OP_EQUAL",
+                "scriptpubkey_type": "p2sh",
+                "scriptpubkey_address": "38RuNhSiZiftB6WVnStu5aUz6jXtCDXQZk",
+                "value": 540
+            },
+            {
+                "scriptpubkey": "0014c8e51cf6891c0a2101aecea8cd5ce9bbbfaf7bba",
+                "scriptpubkey_asm": "OP_0 OP_PUSHBYTES_20 c8e51cf6891c0a2101aecea8cd5ce9bbbfaf7bba",
+                "scriptpubkey_type": "v0_p2wpkh",
+                "scriptpubkey_address": "bc1qerj3ea5frs9zzqdwe65v6h8fhwl677a6s0hxhf",
+                "value": 294
+            },
+            {
+                "scriptpubkey": "0020c485bbb80c4be276e77eac3a983a391cc8b1a1b5f160995a36c3dff18296385a",
+                "scriptpubkey_asm": "OP_0 OP_PUSHBYTES_32 c485bbb80c4be276e77eac3a983a391cc8b1a1b5f160995a36c3dff18296385a",
+                "scriptpubkey_type": "v0_p2wsh",
+                "scriptpubkey_address": "bc1qcjzmhwqvf038dem74safsw3ernytrgd479sfjk3kc00lrq5k8pdqczl83q",
+                "value": 330
+            },
+            {
+                "scriptpubkey": "5120a7a42b268957a06c9de4d7260f1df392ce4d6e7b743f5adc27415ce2afceb3b9",
+                "scriptpubkey_asm": "OP_PUSHNUM_1 OP_PUSHBYTES_32 a7a42b268957a06c9de4d7260f1df392ce4d6e7b743f5adc27415ce2afceb3b9",
+                "scriptpubkey_type": "v1_p2tr",
+                "scriptpubkey_address": "bc1p57jzkf5f27sxe80y6unq780njt8y6mnmwsl44hp8g9ww9t7wkwusv7av76",
+                "value": 330
+            },
+            {
+                "scriptpubkey": "51024e73",
+                "scriptpubkey_asm": "OP_PUSHNUM_1 OP_PUSHBYTES_2 4e73",
+                "scriptpubkey_type": "unknown",
+                "scriptpubkey_address": "bc1pfeessrawgf",
+                "value": 240
+            },
+            {
+                "scriptpubkey": "6a224e6f7420796f757220696e707574732c206e6f7420796f7572206f7574707574732e005152535455565758595a5b5c5d5e5f60",
+                "scriptpubkey_asm": "OP_RETURN OP_PUSHBYTES_34 4e6f7420796f757220696e707574732c206e6f7420796f7572206f7574707574732e OP_0 OP_PUSHNUM_1 OP_PUSHNUM_2 OP_PUSHNUM_3 OP_PUSHNUM_4 OP_PUSHNUM_5 OP_PUSHNUM_6 OP_PUSHNUM_7 OP_PUSHNUM_8 OP_PUSHNUM_9 OP_PUSHNUM_10 OP_PUSHNUM_11 OP_PUSHNUM_12 OP_PUSHNUM_13 OP_PUSHNUM_14 OP_PUSHNUM_15 OP_PUSHNUM_16",
+                "scriptpubkey_type": "op_return",
+                "value": 0
+            }
+        ],
+        "size": 3500,
+        "weight": 8186,
+        "sigops": 115,
+        "fee": 71294,
+        "status": {
+            "confirmed": true,
+            "block_height": 850000,
+            "block_hash": "00000000000000000002a0b5db2a7f8d9087464c2586b546be7bce8eb53b8187",
+            "block_time": 1719689674
+        }
     }
 ]

backend/src/__tests__/config.test.ts

@@ -23,7 +23,7 @@ describe('Mempool Backend Config', () => {
         UNIX_SOCKET_PATH: '',
         SPAWN_CLUSTER_PROCS: 0,
         API_URL_PREFIX: '/api/v1/',
-        AUTOMATIC_BLOCK_REINDEXING: false,
+        AUTOMATIC_POOLS_UPDATE: false,
         POLL_RATE_MS: 2000,
         CACHE_DIR: './cache',
         CACHE_ENABLED: true,
@@ -63,6 +63,7 @@ describe('Mempool Backend Config', () => {
         REQUEST_TIMEOUT: 10000,
         FALLBACK_TIMEOUT: 5000,
         FALLBACK: [],
+        MAX_BEHIND_TIP: 2,
        });
 
       expect(config.CORE_RPC).toStrictEqual({

backend/src/__tests__/gbt/gbt-tests.ts

@@ -13,7 +13,7 @@ const vectorBuffer: Buffer = fs.readFileSync(path.join(__dirname, './', './test-
 
 describe('Rust GBT', () => {
   test('should produce the same template as getBlockTemplate from Bitcoin Core', async () => {
-    const rustGbt = new GbtGenerator();
+    const rustGbt = new GbtGenerator(4_000_000, 8);
     const { mempool, maxUid } = mempoolFromArrayBuffer(vectorBuffer.buffer);
     const result = await rustGbt.make(mempool, [], maxUid);
 

backend/src/api/about.routes.ts

@@ -70,7 +70,7 @@ class AboutRoutes {
           res.status(500).end();
         }
       })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'services/account/images/:username', async (req, res) => {
+      .get(config.MEMPOOL.API_URL_PREFIX + 'services/account/images/:username/:md5', 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 });

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

@@ -14,6 +14,7 @@ class AccelerationRoutes {
       .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.$getAcceleratorAccelerationsStats.bind(this))
+      .post(config.MEMPOOL.API_URL_PREFIX + 'services/accelerator/estimate', this.$getAcceleratorEstimate.bind(this))
     ;
   }
 
@@ -64,6 +65,20 @@ class AccelerationRoutes {
       res.status(500).end();
     }
   }
+
+  private async $getAcceleratorEstimate(req: Request, res: Response): Promise<void> {
+    const url = `${config.MEMPOOL_SERVICES.API}/${req.originalUrl.replace('/api/v1/services/', '')}`;
+    try {
+      const response = await axios.post(url, req.body, { 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 estimate from ${url} in $getAcceleratorEstimate(), ${e}`, this.tag);
+      res.status(500).end();
+    }
+  }
 }
 
 export default new AccelerationRoutes();

backend/src/api/acceleration/acceleration.ts

@@ -1,15 +1,14 @@
 import logger from '../../logger';
 import { MempoolTransactionExtended } from '../../mempool.interfaces';
-import { IEsploraApi } from '../bitcoin/esplora-api.interface';
+import { GraphTx, getSameBlockRelatives, initializeRelatives, makeBlockTemplate, mempoolComparator, removeAncestors, setAncestorScores } from '../mini-miner';
 
 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 = {
+export type Acceleration = {
   txid: string;
   max_bid: number;
 };
@@ -28,31 +27,6 @@ export interface AccelerationInfo {
   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
@@ -61,7 +35,7 @@ class AccelerationCosts {
    * @param accelerationsx
    * @param verboseBlock
    */
-  public calculateBoostRate(accelerations: Acceleration[], blockTxs: IEsploraApi.Transaction[]): number {
+  public calculateBoostRate(accelerations: Acceleration[], blockTxs: MempoolTransactionExtended[]): 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);
@@ -170,108 +144,28 @@ class AccelerationCosts {
   /**
    * 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 txid
-   * @param medianFeeRate 
+   * @param medianFeeRate
    */
   public getAccelerationInfo(tx: MempoolTransactionExtended, targetFeeRate: number, transactions: MempoolTransactionExtended[]): AccelerationInfo {
     // Get same-block transaction ancestors
-    const allRelatives = this.getSameBlockRelatives(tx, transactions);
+    const allRelatives = getSameBlockRelatives(tx, transactions);
-    const relativesMap = this.initializeRelatives(allRelatives);
+    const relativesMap = initializeRelatives(allRelatives);
-    const rootTx = relativesMap.get(tx.txid) as MempoolTx;
+    const rootTx = relativesMap.get(tx.txid) as GraphTx;
 
     // 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 {
+  private calculateAccelerationAncestors(tx: GraphTx, relatives: Map<string, GraphTx>, targetFeeRate: number): AccelerationInfo {
     // add root tx to the ancestor map
     relatives.set(tx.txid, tx);
 
@@ -283,12 +177,12 @@ class AccelerationCosts {
     });
 
     // Initialize individual & ancestor fee rates
-    relatives.forEach(entry => this.setAncestorScores(entry));
+    relatives.forEach(entry => setAncestorScores(entry));
 
     // Sort by descending ancestor score
-    let sortedRelatives = Array.from(relatives.values()).sort(this.mempoolComparator);
+    let sortedRelatives = Array.from(relatives.values()).sort(mempoolComparator);
 
-    let includedInCluster: Map<string, MempoolTx> | null = null;
+    let includedInCluster: Map<string, GraphTx> | null = null;
 
     // While highest score >= targetFeeRate
     let maxIterations = MAX_RELATIVE_GRAPH_SIZE;
@@ -297,17 +191,17 @@ class AccelerationCosts {
       // Grab the highest scoring entry
       const best = sortedRelatives.shift();
       if (best) {
-        const cluster = new Map<string, MempoolTx>(best.ancestors?.entries() || []);
+        const cluster = new Map<string, GraphTx>(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);
+        removeAncestors(cluster, relatives);
 
         // re-sort
-        sortedRelatives = Array.from(relatives.values()).sort(this.mempoolComparator);
+        sortedRelatives = Array.from(relatives.values()).sort(mempoolComparator);
       }
     }
 
@@ -345,394 +239,6 @@ class AccelerationCosts {
       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;
+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

@@ -2,24 +2,28 @@ import config from '../config';
 import logger from '../logger';
 import { MempoolTransactionExtended, MempoolBlockWithTransactions } from '../mempool.interfaces';
 import rbfCache from './rbf-cache';
+import transactionUtils from './transaction-utils';
 
 const PROPAGATION_MARGIN = 180; // in seconds, time since a transaction is first seen after which it is assumed to have propagated to all miners
 
 class Audit {
-  auditBlock(transactions: MempoolTransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: MempoolTransactionExtended }, useAccelerations: boolean = false)
+  auditBlock(height: number, transactions: MempoolTransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: MempoolTransactionExtended })
-   : { censored: string[], added: string[], prioritized: string[], fresh: string[], sigop: string[], fullrbf: string[], accelerated: string[], score: number, similarity: number } {
+   : { unseen: string[], 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: [], prioritized: [], fresh: [], sigop: [], fullrbf: [], accelerated: [], score: 1, similarity: 1 };
+      return { unseen: [], 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 unseen: string[] = []; // present in the mined block, not in our mempool
+    let prioritized: string[] = []; // higher in the block than would be expected by in-band feerate alone
+    let deprioritized: string[] = []; // lower in the block than would be expected by in-band feerate alone
     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
     const isCensored = {}; // missing, without excuse
     const isDisplaced = {};
+    const isAccelerated = {};
     let displacedWeight = 0;
     let matchedWeight = 0;
     let projectedWeight = 0;
@@ -32,6 +36,7 @@ class Audit {
       inBlock[tx.txid] = tx;
       if (mempool[tx.txid] && mempool[tx.txid].acceleration) {
         accelerated.push(tx.txid);
+        isAccelerated[tx.txid] = true;
       }
     }
     // coinbase is always expected
@@ -113,11 +118,16 @@ class Audit {
       } else {
         if (rbfCache.has(tx.txid)) {
           rbf.push(tx.txid);
-        } else if (!isDisplaced[tx.txid]) {
+          if (!mempool[tx.txid] && !rbfCache.getReplacedBy(tx.txid)) {
+            unseen.push(tx.txid);
+          }
+        } else {
           if (mempool[tx.txid]) {
-            prioritized.push(tx.txid);
+            if (isDisplaced[tx.txid]) {
+              added.push(tx.txid);
+            }
           } else {
-            added.push(tx.txid);
+            unseen.push(tx.txid);
           }
         }
         overflowWeight += tx.weight;
@@ -125,6 +135,8 @@ class Audit {
       totalWeight += tx.weight;
     }
 
+    ({ prioritized, deprioritized } = transactionUtils.identifyPrioritizedTransactions(transactions, 'effectiveFeePerVsize'));
+
     // transactions missing from near the end of our template are probably not being censored
     let overflowWeightRemaining = overflowWeight - (config.MEMPOOL.BLOCK_WEIGHT_UNITS - totalWeight);
     let maxOverflowRate = 0;
@@ -165,6 +177,7 @@ class Audit {
     const similarity = projectedWeight ? matchedWeight / projectedWeight : 1;
 
     return {
+      unseen,
       censored: Object.keys(isCensored),
       added,
       prioritized,

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

@@ -28,6 +28,7 @@ export interface AbstractBitcoinApi {
   $getBatchedOutspends(txId: string[]): Promise<IEsploraApi.Outspend[][]>;
   $getBatchedOutspendsInternal(txId: string[]): Promise<IEsploraApi.Outspend[][]>;
   $getOutSpendsByOutpoint(outpoints: { txid: string, vout: number }[]): Promise<IEsploraApi.Outspend[]>;
+  $getCoinbaseTx(blockhash: string): Promise<IEsploraApi.Transaction>;
 
   startHealthChecks(): void;
   getHealthStatus(): HealthCheckHost[];

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

@@ -107,8 +107,14 @@ class BitcoinApi implements AbstractBitcoinApi {
       .then((rpcBlock: IBitcoinApi.Block) => rpcBlock.tx);
   }
 
-  $getTxsForBlock(hash: string): Promise<IEsploraApi.Transaction[]> {
+  async $getTxsForBlock(hash: string): Promise<IEsploraApi.Transaction[]> {
-    throw new Error('Method getTxsForBlock not supported by the Bitcoin RPC API.');
+    const verboseBlock: IBitcoinApi.VerboseBlock = await this.bitcoindClient.getBlock(hash, 2);
+    const transactions: IEsploraApi.Transaction[] = [];
+    for (const tx of verboseBlock.tx) {
+      const converted = await this.$convertTransaction(tx, true);
+      transactions.push(converted);
+    }
+    return transactions;
   }
 
   $getRawBlock(hash: string): Promise<Buffer> {
@@ -159,13 +165,21 @@ class BitcoinApi implements AbstractBitcoinApi {
     const mp = mempool.getMempool();
     for (const tx in mp) {
       for (const vout of mp[tx].vout) {
-        if (vout.scriptpubkey_address.indexOf(prefix) === 0) {
+        if (vout.scriptpubkey_address?.indexOf(prefix) === 0) {
           found[vout.scriptpubkey_address] = '';
           if (Object.keys(found).length >= 10) {
             return Object.keys(found);
           }
         }
       }
+      for (const vin of mp[tx].vin) {
+        if (vin.prevout?.scriptpubkey_address?.indexOf(prefix) === 0) {
+          found[vin.prevout?.scriptpubkey_address] = '';
+          if (Object.keys(found).length >= 10) {
+            return Object.keys(found);
+          }
+        }
+      }
     }
     return Object.keys(found);
   }
@@ -232,6 +246,11 @@ class BitcoinApi implements AbstractBitcoinApi {
     return outspends;
   }
 
+  async $getCoinbaseTx(blockhash: string): Promise<IEsploraApi.Transaction> {
+    const txids = await this.$getTxIdsForBlock(blockhash);
+    return this.$getRawTransaction(txids[0]);
+  }
+
   $getEstimatedHashrate(blockHeight: number): Promise<number> {
     // 120 is the default block span in Core
     return this.bitcoindClient.getNetworkHashPs(120, blockHeight);
@@ -304,6 +323,7 @@ class BitcoinApi implements AbstractBitcoinApi {
       'witness_v1_taproot': 'v1_p2tr',
       'nonstandard': 'nonstandard',
       'multisig': 'multisig',
+      'anchor': 'anchor',
       'nulldata': 'op_return'
     };
 

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

@@ -19,7 +19,8 @@ import bitcoinClient from './bitcoin-client';
 import difficultyAdjustment from '../difficulty-adjustment';
 import transactionRepository from '../../repositories/TransactionRepository';
 import rbfCache from '../rbf-cache';
-import { calculateCpfp } from '../cpfp';
+import { calculateMempoolTxCpfp } from '../cpfp';
+import { handleError } from '../../utils/api';
 
 class BitcoinRoutes {
   public initRoutes(app: Application) {
@@ -42,6 +43,7 @@ class BitcoinRoutes {
       .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash', this.getBlock)
       .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/summary', this.getStrippedBlockTransactions)
       .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/audit-summary', this.getBlockAuditSummary)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/tx/:txid/audit', this.$getBlockTxAuditSummary)
       .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/tip/height', this.getBlockTipHeight)
       .post(config.MEMPOOL.API_URL_PREFIX + 'psbt/addparents', this.postPsbtCompletion)
       .get(config.MEMPOOL.API_URL_PREFIX + 'blocks-bulk/:from', this.getBlocksByBulk.bind(this))
@@ -85,7 +87,7 @@ class BitcoinRoutes {
       res.set('Content-Type', 'application/json');
       res.send(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -104,13 +106,13 @@ class BitcoinRoutes {
       const result = mempoolBlocks.getMempoolBlocks();
       res.json(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   private getTransactionTimes(req: Request, res: Response) {
     if (!Array.isArray(req.query.txId)) {
-      res.status(500).send('Not an array');
+      handleError(req, res, 500, 'Not an array');
       return;
     }
     const txIds: string[] = [];
@@ -127,12 +129,12 @@ class BitcoinRoutes {
   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');
+      handleError(req, res, 500, 'Invalid txids format');
       return;
     }
     const txids = txids_csv.split(',');
     if (txids.length > 50) {
-      res.status(400).send('Too many txids requested');
+      handleError(req, res, 400, 'Too many txids requested');
       return;
     }
 
@@ -140,13 +142,13 @@ class BitcoinRoutes {
       const batchedOutspends = await bitcoinApi.$getBatchedOutspends(txids);
       res.json(batchedOutspends);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   private async $getCpfpInfo(req: Request, res: Response) {
     if (!/^[a-fA-F0-9]{64}$/.test(req.params.txId)) {
-      res.status(501).send(`Invalid transaction ID.`);
+      handleError(req, res, 501, `Invalid transaction ID.`);
       return;
     }
 
@@ -159,13 +161,17 @@ class BitcoinRoutes {
           descendants: tx.descendants || null,
           effectiveFeePerVsize: tx.effectiveFeePerVsize || null,
           sigops: tx.sigops,
+          fee: tx.fee,
           adjustedVsize: tx.adjustedVsize,
-          acceleration: tx.acceleration
+          acceleration: tx.acceleration,
+          acceleratedBy: tx.acceleratedBy || undefined,
+          acceleratedAt: tx.acceleratedAt || undefined,
+          feeDelta: tx.feeDelta || undefined,
         });
         return;
       }
 
-      const cpfpInfo = calculateCpfp(tx, mempool.getMempool());
+      const cpfpInfo = calculateMempoolTxCpfp(tx, mempool.getMempool());
 
       res.json(cpfpInfo);
       return;
@@ -175,7 +181,7 @@ class BitcoinRoutes {
         try {
           cpfpInfo = await transactionRepository.$getCpfpInfo(req.params.txId);
         } catch (e) {
-          res.status(500).send('failed to get CPFP info');
+          handleError(req, res, 500, 'failed to get CPFP info');
           return;
         }
       }
@@ -204,7 +210,7 @@ class BitcoinRoutes {
       if (e instanceof Error && e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
         statusCode = 404;
       }
-      res.status(statusCode).send(e instanceof Error ? e.message : e);
+      handleError(req, res, statusCode, e instanceof Error ? e.message : e);
     }
   }
 
@@ -218,7 +224,7 @@ class BitcoinRoutes {
       if (e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
         statusCode = 404;
       }
-      res.status(statusCode).send(e instanceof Error ? e.message : e);
+      handleError(req, res, statusCode, e instanceof Error ? e.message : e);
     }
   }
 
@@ -279,13 +285,13 @@ class BitcoinRoutes {
         // Not modified
         // 422 Unprocessable Entity
         // https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/422
-        res.status(422).send(`Psbt had no missing nonWitnessUtxos.`);
+        handleError(req, res, 422, `Psbt had no missing nonWitnessUtxos.`);
       }
     } catch (e: any) {
       if (e instanceof Error && new RegExp(notFoundError).test(e.message)) {
-        res.status(404).send(e.message);
+        handleError(req, res, 404, e.message);
       } else {
-        res.status(500).send(e instanceof Error ? e.message : e);
+        handleError(req, res, 500, e instanceof Error ? e.message : e);
       }
     }
   }
@@ -299,7 +305,7 @@ class BitcoinRoutes {
       if (e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
         statusCode = 404;
       }
-      res.status(statusCode).send(e instanceof Error ? e.message : e);
+      handleError(req, res, statusCode, e instanceof Error ? e.message : e);
     }
   }
 
@@ -309,7 +315,7 @@ class BitcoinRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24 * 30).toUTCString());
       res.json(transactions);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -331,7 +337,7 @@ class BitcoinRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * cacheDuration).toUTCString());
       res.json(block);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -341,7 +347,7 @@ class BitcoinRoutes {
       res.setHeader('content-type', 'text/plain');
       res.send(blockHeader);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -352,7 +358,23 @@ class BitcoinRoutes {
         res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24 * 30).toUTCString());
         res.json(auditSummary);
       } else {
-        return res.status(404).send(`audit not available`);
+        handleError(req, res, 404, `audit not available`);
+        return;
+      }
+    } catch (e) {
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getBlockTxAuditSummary(req: Request, res: Response) {
+    try {
+      const auditSummary = await blocks.$getBlockTxAuditSummary(req.params.hash, req.params.txid);
+      if (auditSummary) {
+        res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24 * 30).toUTCString());
+        res.json(auditSummary);
+      } else {
+        handleError(req, res, 404, `transaction audit not available`);
+        return;
       }
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
@@ -369,42 +391,49 @@ class BitcoinRoutes {
         return await this.getLegacyBlocks(req, res);
       }
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   private async getBlocksByBulk(req: Request, res: Response) {
     try {
       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`);
+        handleError(req, res, 404, `This API is only available for Bitcoin networks`);
+        return;
       }
       if (config.MEMPOOL.MAX_BLOCKS_BULK_QUERY <= 0) {
-        return res.status(404).send(`This API is disabled. Set config.MEMPOOL.MAX_BLOCKS_BULK_QUERY to a positive number to enable it.`);
+        handleError(req, res, 404, `This API is disabled. Set config.MEMPOOL.MAX_BLOCKS_BULK_QUERY to a positive number to enable it.`);
+        return;
       }
       if (!Common.indexingEnabled()) {
-        return res.status(404).send(`Indexing is required for this API`);
+        handleError(req, res, 404, `Indexing is required for this API`);
+        return;
       }
 
       const from = parseInt(req.params.from, 10);
       if (!req.params.from || from < 0) {
-        return res.status(400).send(`Parameter 'from' must be a block height (integer)`);
+        handleError(req, res, 400, `Parameter 'from' must be a block height (integer)`);
+        return;
       }
       const to = req.params.to === undefined ? await bitcoinApi.$getBlockHeightTip() : parseInt(req.params.to, 10);
       if (to < 0) {
-        return res.status(400).send(`Parameter 'to' must be a block height (integer)`);
+        handleError(req, res, 400, `Parameter 'to' must be a block height (integer)`);
+        return;
       }
       if (from > to) {
-        return res.status(400).send(`Parameter 'to' must be a higher block height than 'from'`);
+        handleError(req, res, 400, `Parameter 'to' must be a higher block height than 'from'`);
+        return;
       }
       if ((to - from + 1) > config.MEMPOOL.MAX_BLOCKS_BULK_QUERY) {
-        return res.status(400).send(`You can only query ${config.MEMPOOL.MAX_BLOCKS_BULK_QUERY} blocks at once.`);
+        handleError(req, res, 400, `You can only query ${config.MEMPOOL.MAX_BLOCKS_BULK_QUERY} blocks at once.`);
+        return;
       }
 
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(await blocks.$getBlocksBetweenHeight(from, to));
 
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -439,10 +468,10 @@ class BitcoinRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(returnBlocks);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
-  
+
   private async getBlockTransactions(req: Request, res: Response) {
     try {
       loadingIndicators.setProgress('blocktxs-' + req.params.hash, 0);
@@ -464,7 +493,7 @@ class BitcoinRoutes {
       res.json(transactions);
     } catch (e) {
       loadingIndicators.setProgress('blocktxs-' + req.params.hash, 100);
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -473,13 +502,13 @@ class BitcoinRoutes {
       const blockHash = await bitcoinApi.$getBlockHash(parseInt(req.params.height, 10));
       res.send(blockHash);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   private async getAddress(req: Request, res: Response) {
     if (config.MEMPOOL.BACKEND === 'none') {
-      res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
+      handleError(req, res, 405, 'Address lookups cannot be used with bitcoind as backend.');
       return;
     }
 
@@ -488,15 +517,16 @@ class BitcoinRoutes {
       res.json(addressData);
     } catch (e) {
       if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
-        return res.status(413).send(e instanceof Error ? e.message : e);
+        handleError(req, res, 413, e instanceof Error ? e.message : e);
+        return;
       }
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   private async getAddressTransactions(req: Request, res: Response): Promise<void> {
     if (config.MEMPOOL.BACKEND === 'none') {
-      res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
+      handleError(req, res, 405, 'Address lookups cannot be used with bitcoind as backend.');
       return;
     }
 
@@ -509,23 +539,23 @@ class BitcoinRoutes {
       res.json(transactions);
     } catch (e) {
       if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
-        res.status(413).send(e instanceof Error ? e.message : e);
+        handleError(req, res, 413, e instanceof Error ? e.message : e);
         return;
       }
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   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.');
+      handleError(req, res, 405, '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.');
+      handleError(req, res, 405, 'Address lookups cannot be used with bitcoind as backend.');
       return;
     }
 
@@ -536,15 +566,16 @@ class BitcoinRoutes {
       res.json(addressData);
     } catch (e) {
       if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
-        return res.status(413).send(e instanceof Error ? e.message : e);
+        handleError(req, res, 413, e instanceof Error ? e.message : e);
+        return;
       }
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   private async getScriptHashTransactions(req: Request, res: Response): Promise<void> {
     if (config.MEMPOOL.BACKEND === 'none') {
-      res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
+      handleError(req, res, 405, 'Address lookups cannot be used with bitcoind as backend.');
       return;
     }
 
@@ -559,16 +590,16 @@ class BitcoinRoutes {
       res.json(transactions);
     } catch (e) {
       if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
-        res.status(413).send(e instanceof Error ? e.message : e);
+        handleError(req, res, 413, e instanceof Error ? e.message : e);
         return;
       }
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   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.');
+      handleError(req, res, 405, 'Scripthash summary lookups require mempool/electrs backend.');
       return;
     }
   }
@@ -578,7 +609,7 @@ class BitcoinRoutes {
       const blockHash = await bitcoinApi.$getAddressPrefix(req.params.prefix);
       res.send(blockHash);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -605,7 +636,7 @@ class BitcoinRoutes {
       const rawMempool = await bitcoinApi.$getRawMempool();
       res.send(rawMempool);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -613,12 +644,13 @@ class BitcoinRoutes {
     try {
       const result = blocks.getCurrentBlockHeight();
       if (!result) {
-        return res.status(503).send(`Service Temporarily Unavailable`);
+        handleError(req, res, 503, `Service Temporarily Unavailable`);
+        return;
       }
       res.setHeader('content-type', 'text/plain');
       res.send(result.toString());
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -628,7 +660,7 @@ class BitcoinRoutes {
       res.setHeader('content-type', 'text/plain');
       res.send(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -638,7 +670,7 @@ class BitcoinRoutes {
       res.setHeader('content-type', 'application/octet-stream');
       res.send(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -647,7 +679,7 @@ class BitcoinRoutes {
       const result = await bitcoinApi.$getTxIdsForBlock(req.params.hash);
       res.json(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -656,7 +688,7 @@ class BitcoinRoutes {
       const result = await bitcoinClient.validateAddress(req.params.address);
       res.json(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -669,7 +701,7 @@ class BitcoinRoutes {
         replaces
       });
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -678,7 +710,7 @@ class BitcoinRoutes {
       const result = rbfCache.getRbfTrees(false);
       res.json(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -687,7 +719,7 @@ class BitcoinRoutes {
       const result = rbfCache.getRbfTrees(true);
       res.json(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -700,7 +732,7 @@ class BitcoinRoutes {
         res.status(204).send();
       }
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -709,7 +741,7 @@ class BitcoinRoutes {
       const result = await bitcoinApi.$getOutspends(req.params.txId);
       res.json(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -719,10 +751,10 @@ class BitcoinRoutes {
       if (da) {
         res.json(da);
       } else {
-        res.status(503).send(`Service Temporarily Unavailable`);
+        handleError(req, res, 503, `Service Temporarily Unavailable`);
       }
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -733,7 +765,7 @@ class BitcoinRoutes {
       const txIdResult = await bitcoinApi.$sendRawTransaction(rawTx);
       res.send(txIdResult);
     } catch (e: any) {
-      res.status(400).send(e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
+      handleError(req, res, 400, e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
         : (e.message || 'Error'));
     }
   }
@@ -745,7 +777,7 @@ class BitcoinRoutes {
       const txIdResult = await bitcoinClient.sendRawTransaction(txHex);
       res.send(txIdResult);
     } catch (e: any) {
-      res.status(400).send(e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
+      handleError(req, res, 400, e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
         : (e.message || 'Error'));
     }
   }
@@ -757,8 +789,7 @@ class BitcoinRoutes {
       const result = await bitcoinApi.$testMempoolAccept(rawTxs, maxfeerate);
       res.send(result);
     } catch (e: any) {
-      res.setHeader('content-type', 'text/plain');
+      handleError(req, res, 400, e.message && e.code ? 'testmempoolaccept RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
-      res.status(400).send(e.message && e.code ? 'testmempoolaccept RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
         : (e.message || 'Error'));
     }
   }

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

@@ -54,7 +54,7 @@ export namespace IEsploraApi {
     scriptpubkey: string;
     scriptpubkey_asm: string;
     scriptpubkey_type: string;
-    scriptpubkey_address: string;
+    scriptpubkey_address?: string;
     value: number;
     // Elements
     valuecommitment?: number;

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

@@ -25,6 +25,7 @@ interface FailoverHost {
 class FailoverRouter {
   activeHost: FailoverHost;
   fallbackHost: FailoverHost;
+  maxSlippage: number = config.ESPLORA.MAX_BEHIND_TIP ?? 2;
   maxHeight: number = 0;
   hosts: FailoverHost[];
   multihost: boolean;
@@ -93,13 +94,13 @@ class FailoverRouter {
         );
         if (result) {
           const height = result.data;
-          this.maxHeight = Math.max(height, this.maxHeight);
+          host.latestHeight = height;
+          this.maxHeight = Math.max(height || 0, ...this.hosts.map(h => (!(h.unreachable || h.timedOut || h.outOfSync) ? h.latestHeight || 0 : 0)));
           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 > this.maxSlippage)) {
-          if (height == null || isNaN(height) || (this.maxHeight - height > 2)) {
             host.outOfSync = true;
           } else {
             host.outOfSync = false;
@@ -126,7 +127,6 @@ class FailoverRouter {
       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)) {
@@ -184,7 +184,6 @@ class FailoverRouter {
 
   // depose the active host and choose the next best replacement
   private electHost(): void {
-    this.activeHost.outOfSync = true;
     this.activeHost.failures = 0;
     const rankOrder = this.sortHosts();
     this.activeHost = rankOrder[0];
@@ -195,6 +194,7 @@ class FailoverRouter {
     host.failures++;
     if (host.failures > 5 && this.multihost) {
       logger.warn(`🚨🚨🚨 Too many esplora failures on ${this.activeHost.host}, falling back to next best alternative 🚨🚨🚨`);
+      this.activeHost.unreachable = true;
       this.electHost();
       return this.activeHost;
     } else {
@@ -352,6 +352,11 @@ class ElectrsApi implements AbstractBitcoinApi {
     return this.failoverRouter.$post<IEsploraApi.Outspend[]>('/internal/txs/outspends/by-outpoint', outpoints.map(out => `${out.txid}:${out.vout}`), 'json');
   }
 
+  async $getCoinbaseTx(blockhash: string): Promise<IEsploraApi.Transaction> {
+    const txid = await this.failoverRouter.$get<string>(`/block/${blockhash}/txid/0`);
+    return this.failoverRouter.$get<IEsploraApi.Transaction>('/tx/' + txid);
+  }
+
   public startHealthChecks(): void {
     this.failoverRouter.startHealthChecks();
   }

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, TransactionMinerInfo, CpfpSummary, MempoolTransactionExtended, TransactionClassified, BlockAudit } from '../mempool.interfaces';
+import { BlockExtended, BlockExtension, BlockSummary, PoolTag, TransactionExtended, TransactionMinerInfo, CpfpSummary, MempoolTransactionExtended, TransactionClassified, BlockAudit, TransactionAudit } from '../mempool.interfaces';
 import { Common } from './common';
 import diskCache from './disk-cache';
 import transactionUtils from './transaction-utils';
@@ -30,6 +30,10 @@ import redisCache from './redis-cache';
 import rbfCache from './rbf-cache';
 import { calcBitsDifference } from './difficulty-adjustment';
 import AccelerationRepository from '../repositories/AccelerationRepository';
+import { calculateFastBlockCpfp, calculateGoodBlockCpfp } from './cpfp';
+import mempool from './mempool';
+import CpfpRepository from '../repositories/CpfpRepository';
+import accelerationApi from './services/acceleration';
 
 class Blocks {
   private blocks: BlockExtended[] = [];
@@ -215,10 +219,10 @@ class Blocks {
     };
   }
 
-  public summarizeBlockTransactions(hash: string, transactions: TransactionExtended[]): BlockSummary {
+  public summarizeBlockTransactions(hash: string, height: number, transactions: TransactionExtended[]): BlockSummary {
     return {
       id: hash,
-      transactions: Common.classifyTransactions(transactions),
+      transactions: Common.classifyTransactions(transactions, height),
     };
   }
 
@@ -295,10 +299,12 @@ class Blocks {
     extras.virtualSize = block.weight / 4.0;
     if (coinbaseTx?.vout.length > 0) {
       extras.coinbaseAddress = coinbaseTx.vout[0].scriptpubkey_address ?? null;
+      extras.coinbaseAddresses = [...new Set<string>(coinbaseTx.vout.map(v => v.scriptpubkey_address).filter(a => a) as string[])];
       extras.coinbaseSignature = coinbaseTx.vout[0].scriptpubkey_asm ?? null;
       extras.coinbaseSignatureAscii = transactionUtils.hex2ascii(coinbaseTx.vin[0].scriptsig) ?? null;
     } else {
       extras.coinbaseAddress = null;
+      extras.coinbaseAddresses = null;
       extras.coinbaseSignature = null;
       extras.coinbaseSignatureAscii = null;
     }
@@ -370,8 +376,7 @@ class Blocks {
       }
     }
 
-    const asciiScriptSig = transactionUtils.hex2ascii(txMinerInfo.vin[0].scriptsig);
+    const addresses = txMinerInfo.vout.map((vout) => vout.scriptpubkey_address).filter(address => address) as string[];
-    const addresses = txMinerInfo.vout.map((vout) => vout.scriptpubkey_address).filter((address) => address);
 
     let pools: PoolTag[] = [];
     if (config.DATABASE.ENABLED === true) {
@@ -380,26 +385,9 @@ class Blocks {
       pools = poolsParser.miningPools;
     }
 
-    for (let i = 0; i < pools.length; ++i) {
+    const pool = poolsParser.matchBlockMiner(txMinerInfo.vin[0].scriptsig, addresses || [], pools);
-      if (addresses.length) {
+    if (pool) {
-        const poolAddresses: string[] = typeof pools[i].addresses === 'string' ?
+      return pool;
-          JSON.parse(pools[i].addresses) : pools[i].addresses;
-        for (let y = 0; y < poolAddresses.length; y++) {
-          if (addresses.indexOf(poolAddresses[y]) !== -1) {
-            return pools[i];
-          }
-        }
-      }
-
-      const regexes: string[] = typeof pools[i].regexes === 'string' ?
-        JSON.parse(pools[i].regexes) : pools[i].regexes;
-      for (let y = 0; y < regexes.length; ++y) {
-        const regex = new RegExp(regexes[y], 'i');
-        const match = asciiScriptSig.match(regex);
-        if (match !== null) {
-          return pools[i];
-        }
-      }
     }
 
     if (config.DATABASE.ENABLED === true) {
@@ -452,7 +440,7 @@ class Blocks {
 
 
         if (config.MEMPOOL.BACKEND === 'esplora') {
-          const txs = (await bitcoinApi.$getTxsForBlock(block.hash)).map(tx => transactionUtils.extendTransaction(tx));
+          const txs = (await bitcoinApi.$getTxsForBlock(block.hash)).map(tx => transactionUtils.extendMempoolTransaction(tx));
           const cpfpSummary = await this.$indexCPFP(block.hash, block.height, txs);
           if (cpfpSummary) {
             await this.$getStrippedBlockTransactions(block.hash, true, true, cpfpSummary, block.height); // This will index the block summary
@@ -583,8 +571,11 @@ class Blocks {
     const blockchainInfo = await bitcoinClient.getBlockchainInfo();
     const currentBlockHeight = blockchainInfo.blocks;
 
-    const unclassifiedBlocksList = await BlocksSummariesRepository.$getSummariesWithVersion(0);
+    const targetSummaryVersion: number = 1;
-    const unclassifiedTemplatesList = await BlocksSummariesRepository.$getTemplatesWithVersion(0);
+    const targetTemplateVersion: number = 1;
+
+    const unclassifiedBlocksList = await BlocksSummariesRepository.$getSummariesBelowVersion(targetSummaryVersion);
+    const unclassifiedTemplatesList = await BlocksSummariesRepository.$getTemplatesBelowVersion(targetTemplateVersion);
 
     // nothing to do
     if (!unclassifiedBlocksList?.length && !unclassifiedTemplatesList?.length) {
@@ -617,16 +608,24 @@ class Blocks {
 
     for (let height = currentBlockHeight; height >= 0; height--) {
       try {
-        let txs: TransactionExtended[] | null = null;
+        let txs: MempoolTransactionExtended[] | null = null;
         if (unclassifiedBlocks[height]) {
           const blockHash = unclassifiedBlocks[height];
           // fetch transactions
-          txs = (await bitcoinApi.$getTxsForBlock(blockHash)).map(tx => transactionUtils.extendTransaction(tx)) || [];
+          txs = (await bitcoinApi.$getTxsForBlock(blockHash)).map(tx => transactionUtils.extendMempoolTransaction(tx)) || [];
           // add CPFP
-          const cpfpSummary = Common.calculateCpfp(height, txs, true);
+          const cpfpSummary = calculateGoodBlockCpfp(height, txs, []);
           // classify
-          const { transactions: classifiedTxs } = this.summarizeBlockTransactions(blockHash, cpfpSummary.transactions);
+          const { transactions: classifiedTxs } = this.summarizeBlockTransactions(blockHash, height, cpfpSummary.transactions);
-          await BlocksSummariesRepository.$saveTransactions(height, blockHash, classifiedTxs, 1);
+          await BlocksSummariesRepository.$saveTransactions(height, blockHash, classifiedTxs, 2);
+          if (unclassifiedBlocks[height].version < 2 && targetSummaryVersion === 2) {
+            const cpfpClusters = await CpfpRepository.$getClustersAt(height);
+            if (!cpfpRepository.compareClusters(cpfpClusters, cpfpSummary.clusters)) {
+              // CPFP clusters changed - update the compact_cpfp tables
+              await CpfpRepository.$deleteClustersAt(height);
+              await this.$saveCpfp(blockHash, height, cpfpSummary);
+            }
+          }
           await Common.sleep$(250);
         }
         if (unclassifiedTemplates[height]) {
@@ -652,9 +651,9 @@ class Blocks {
               }
               templateTxs.push(tx || templateTx);
             }
-            const cpfpSummary = Common.calculateCpfp(height, templateTxs?.filter(tx => tx['effectiveFeePerVsize'] != null) as TransactionExtended[], true);
+            const cpfpSummary = calculateGoodBlockCpfp(height, templateTxs?.filter(tx => tx['effectiveFeePerVsize'] != null) as MempoolTransactionExtended[], []);
             // classify
-            const { transactions: classifiedTxs } = this.summarizeBlockTransactions(blockHash, cpfpSummary.transactions);
+            const { transactions: classifiedTxs } = this.summarizeBlockTransactions(blockHash, height, cpfpSummary.transactions);
             const classifiedTxMap: { [txid: string]: TransactionClassified } = {};
             for (const tx of classifiedTxs) {
               classifiedTxMap[tx.txid] = tx;
@@ -690,6 +689,52 @@ class Blocks {
     this.classifyingBlocks = false;
   }
 
+  /**
+   * [INDEXING] Index missing coinbase addresses for all blocks
+   */
+  public async $indexCoinbaseAddresses(): Promise<void> {
+    try {
+      // Get all indexed block hash
+      const unindexedBlocks = await blocksRepository.$getBlocksWithoutCoinbaseAddresses();
+
+      if (!unindexedBlocks?.length) {
+        return;
+      }
+
+      logger.info(`Indexing missing coinbase addresses for ${unindexedBlocks.length} blocks`);
+
+      // Logging
+      let count = 0;
+      let countThisRun = 0;
+      let timer = Date.now() / 1000;
+      const startedAt = Date.now() / 1000;
+      for (const { height, hash } of unindexedBlocks) {
+        // Logging
+        const elapsedSeconds = (Date.now() / 1000) - timer;
+        if (elapsedSeconds > 5) {
+          const runningFor = (Date.now() / 1000) - startedAt;
+          const blockPerSeconds = countThisRun / elapsedSeconds;
+          const progress = Math.round(count / unindexedBlocks.length * 10000) / 100;
+          logger.debug(`Indexing coinbase addresses for #${height} | ~${blockPerSeconds.toFixed(2)} blocks/sec | total: ${count}/${unindexedBlocks.length} (${progress}%) | elapsed: ${runningFor.toFixed(2)} seconds`);
+          timer = Date.now() / 1000;
+          countThisRun = 0;
+        }
+
+        const coinbaseTx = await bitcoinApi.$getCoinbaseTx(hash);
+        const addresses = new Set<string>(coinbaseTx.vout.map(v => v.scriptpubkey_address).filter(a => a) as string[]);
+        await blocksRepository.$saveCoinbaseAddresses(hash, [...addresses]);
+
+        // Logging
+        count++;
+        countThisRun++;
+      }
+      logger.notice(`coinbase addresses indexing completed: indexed ${count} blocks`);
+    } catch (e) {
+      logger.err(`coinbase addresses indexing failed. Trying again in 10 seconds. Reason: ${(e instanceof Error ? e.message : e)}`);
+      throw e;
+    }
+  }
+
   /**
    * [INDEXING] Index all blocks metadata for the mining dashboard
    */
@@ -860,9 +905,14 @@ class Blocks {
         }
       }
 
-      const cpfpSummary: CpfpSummary = Common.calculateCpfp(block.height, transactions);
+      let accelerations = Object.values(mempool.getAccelerations());
+      if (accelerations?.length > 0) {
+        const pool = await this.$findBlockMiner(transactionUtils.stripCoinbaseTransaction(transactions[0]));
+        accelerations = accelerations.filter(a => a.pools.includes(pool.uniqueId));
+      }
+      const cpfpSummary: CpfpSummary = calculateGoodBlockCpfp(block.height, transactions, accelerations.map(a => ({ txid: a.txid, max_bid: a.feeDelta })));
       const blockExtended: BlockExtended = await this.$getBlockExtended(block, cpfpSummary.transactions);
-      const blockSummary: BlockSummary = this.summarizeBlockTransactions(block.id, cpfpSummary.transactions);
+      const blockSummary: BlockSummary = this.summarizeBlockTransactions(block.id, block.height, cpfpSummary.transactions);
       this.updateTimerProgress(timer, `got block data for ${this.currentBlockHeight}`);
 
       if (Common.indexingEnabled()) {
@@ -883,12 +933,12 @@ class Blocks {
               const newBlock = await this.$indexBlock(lastBlock.height - i);
               this.blocks.push(newBlock);
               this.updateTimerProgress(timer, `reindexed block`);
-              let cpfpSummary;
+              let newCpfpSummary;
               if (config.MEMPOOL.CPFP_INDEXING) {
-                cpfpSummary = await this.$indexCPFP(newBlock.id, lastBlock.height - i);
+                newCpfpSummary = await this.$indexCPFP(newBlock.id, lastBlock.height - i);
                 this.updateTimerProgress(timer, `reindexed block cpfp`);
               }
-              await this.$getStrippedBlockTransactions(newBlock.id, true, true, cpfpSummary, newBlock.height);
+              await this.$getStrippedBlockTransactions(newBlock.id, true, true, newCpfpSummary, newBlock.height);
               this.updateTimerProgress(timer, `reindexed block summary`);
             }
             await mining.$indexDifficultyAdjustments();
@@ -937,7 +987,7 @@ class Blocks {
 
       // start async callbacks
       this.updateTimerProgress(timer, `starting async callbacks for ${this.currentBlockHeight}`);
-      const callbackPromises = this.newAsyncBlockCallbacks.map((cb) => cb(blockExtended, txIds, transactions));
+      const callbackPromises = this.newAsyncBlockCallbacks.map((cb) => cb(blockExtended, txIds, cpfpSummary.transactions));
 
       if (block.height % 2016 === 0) {
         if (Common.indexingEnabled()) {
@@ -1119,7 +1169,7 @@ class Blocks {
         transactions: cpfpSummary.transactions.map(tx => {
           let flags: number = 0;
           try {
-            flags = tx.flags || Common.getTransactionFlags(tx);
+            flags = Common.getTransactionFlags(tx, height);
           } catch (e) {
             logger.warn('Failed to classify transaction: ' + (e instanceof Error ? e.message : e));
           }
@@ -1134,11 +1184,11 @@ class Blocks {
           };
         }),
       };
-      summaryVersion = 1;
+      summaryVersion = cpfpSummary.version;
     } else {
       if (config.MEMPOOL.BACKEND === 'esplora') {
         const txs = (await bitcoinApi.$getTxsForBlock(hash)).map(tx => transactionUtils.extendTransaction(tx));
-        summary = this.summarizeBlockTransactions(hash, txs);
+        summary = this.summarizeBlockTransactions(hash, height || 0, txs);
         summaryVersion = 1;
       } else {
         // Call Core RPC
@@ -1259,6 +1309,7 @@ class Blocks {
         utxoset_size: block.extras.utxoSetSize ?? null,
         coinbase_raw: block.extras.coinbaseRaw ?? null,
         coinbase_address: block.extras.coinbaseAddress ?? null,
+        coinbase_addresses: block.extras.coinbaseAddresses ?? null,
         coinbase_signature: block.extras.coinbaseSignature ?? null,
         coinbase_signature_ascii: block.extras.coinbaseSignatureAscii ?? null,
         pool_slug: block.extras.pool.slug ?? null,
@@ -1273,7 +1324,7 @@ class Blocks {
           let summaryVersion = 0;
           if (config.MEMPOOL.BACKEND === 'esplora') {
             const txs = (await bitcoinApi.$getTxsForBlock(cleanBlock.hash)).map(tx => transactionUtils.extendTransaction(tx));
-            summary = this.summarizeBlockTransactions(cleanBlock.hash, txs);
+            summary = this.summarizeBlockTransactions(cleanBlock.hash, cleanBlock.height, txs);
             summaryVersion = 1;
           } else {
             // Call Core RPC
@@ -1328,6 +1379,14 @@ class Blocks {
     }
   }
 
+  public async $getBlockTxAuditSummary(hash: string, txid: string): Promise<TransactionAudit | null> {
+    if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) {
+      return BlocksAuditsRepository.$getBlockTxAudit(hash, txid);
+    } else {
+      return null;
+    }
+  }
+
   public getLastDifficultyAdjustmentTime(): number {
     return this.lastDifficultyAdjustmentTime;
   }
@@ -1344,11 +1403,11 @@ class Blocks {
     return this.currentBlockHeight;
   }
 
-  public async $indexCPFP(hash: string, height: number, txs?: TransactionExtended[]): Promise<CpfpSummary | null> {
+  public async $indexCPFP(hash: string, height: number, txs?: MempoolTransactionExtended[]): Promise<CpfpSummary | null> {
     let transactions = txs;
     if (!transactions) {
       if (config.MEMPOOL.BACKEND === 'esplora') {
-        transactions = (await bitcoinApi.$getTxsForBlock(hash)).map(tx => transactionUtils.extendTransaction(tx));
+        transactions = (await bitcoinApi.$getTxsForBlock(hash)).map(tx => transactionUtils.extendMempoolTransaction(tx));
       }
       if (!transactions) {
         const block = await bitcoinClient.getBlock(hash, 2);
@@ -1360,7 +1419,7 @@ class Blocks {
     }
 
     if (transactions?.length != null) {
-      const summary = Common.calculateCpfp(height, transactions as TransactionExtended[]);
+      const summary = calculateFastBlockCpfp(height, transactions);
 
       await this.$saveCpfp(hash, height, summary);
 

backend/src/api/common.ts

@@ -1,6 +1,6 @@
 import * as bitcoinjs from 'bitcoinjs-lib';
 import { Request } from 'express';
-import { CpfpInfo, CpfpSummary, CpfpCluster, EffectiveFeeStats, MempoolBlockWithTransactions, TransactionExtended, MempoolTransactionExtended, TransactionStripped, WorkingEffectiveFeeStats, TransactionClassified, TransactionFlags } from '../mempool.interfaces';
+import { EffectiveFeeStats, MempoolBlockWithTransactions, TransactionExtended, MempoolTransactionExtended, TransactionStripped, WorkingEffectiveFeeStats, TransactionClassified, TransactionFlags } from '../mempool.interfaces';
 import config from '../config';
 import { NodeSocket } from '../repositories/NodesSocketsRepository';
 import { isIP } from 'net';
@@ -10,7 +10,6 @@ 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);
@@ -80,8 +79,8 @@ export class Common {
     return arr;
   }
 
-  static findRbfTransactions(added: MempoolTransactionExtended[], deleted: MempoolTransactionExtended[], forceScalable = false): { [txid: string]: MempoolTransactionExtended[] } {
+  static findRbfTransactions(added: MempoolTransactionExtended[], deleted: MempoolTransactionExtended[], forceScalable = false): { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }} {
-    const matches: { [txid: string]: MempoolTransactionExtended[] } = {};
+    const matches: { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }} = {};
 
     // For small N, a naive nested loop is extremely fast, but it doesn't scale
     if (added.length < 1000 && deleted.length < 50 && !forceScalable) {
@@ -96,7 +95,7 @@ export class Common {
               addedTx.vin.some((vin) => vin.txid === deletedVin.txid && vin.vout === deletedVin.vout));
             });
         if (foundMatches?.length) {
-          matches[addedTx.txid] = [...new Set(foundMatches)];
+          matches[addedTx.txid] = { replaced: [...new Set(foundMatches)], replacedBy: addedTx };
         }
       });
     } else {
@@ -124,7 +123,7 @@ export class Common {
             foundMatches.add(deletedTx);
           }
           if (foundMatches.size) {
-            matches[addedTx.txid] = [...foundMatches];
+            matches[addedTx.txid] = { replaced: [...foundMatches], replacedBy: addedTx };
           }
         }
       }
@@ -139,17 +138,17 @@ export class Common {
       const replaced: Set<MempoolTransactionExtended> = new Set();
       for (let i = 0; i < tx.vin.length; i++) {
         const vin = tx.vin[i];
-        const match = spendMap.get(`${vin.txid}:${vin.vout}`);
+        const key = `${vin.txid}:${vin.vout}`;
+        const match = spendMap.get(key);
         if (match && match.txid !== tx.txid) {
           replaced.add(match);
           // remove this tx from the spendMap
           // prevents the same tx being replaced more than once
           for (const replacedVin of match.vin) {
-            const key = `${replacedVin.txid}:${replacedVin.vout}`;
+            const replacedKey = `${replacedVin.txid}:${replacedVin.vout}`;
-            spendMap.delete(key);
+            spendMap.delete(replacedKey);
           }
         }
-        const key = `${vin.txid}:${vin.vout}`;
         spendMap.delete(key);
       }
       if (replaced.size) {
@@ -200,10 +199,13 @@ export class Common {
    *
    * 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)
+   *
+   * As standardness rules change, we'll need to apply the rules in force *at the time* to older blocks.
+   * For now, just pull out individual rules into versioned functions where necessary.
    */
-  static isNonStandard(tx: TransactionExtended): boolean {
+  static isNonStandard(tx: TransactionExtended, height?: number): boolean {
     // version
-    if (tx.version > TX_MAX_STANDARD_VERSION) {
+    if (this.isNonStandardVersion(tx, height)) {
       return true;
     }
 
@@ -250,6 +252,8 @@ export class Common {
         }
       } else if (['unknown', 'provably_unspendable', 'empty'].includes(vin.prevout?.scriptpubkey_type || '')) {
         return true;
+      } else if (this.isNonStandardAnchor(tx, height)) {
+        return true;
       }
       // TODO: bad-witness-nonstandard
     }
@@ -258,9 +262,15 @@ export class Common {
     let opreturnCount = 0;
     for (const vout of tx.vout) {
       // scriptpubkey
-      if (['unknown', 'provably_unspendable', 'empty'].includes(vout.scriptpubkey_type)) {
+      if (['nonstandard', 'provably_unspendable', 'empty'].includes(vout.scriptpubkey_type)) {
         // (non-standard output type)
         return true;
+      } else if (vout.scriptpubkey_type === 'unknown') {
+        // undefined segwit version/length combinations are actually standard in outputs
+        // https://github.com/bitcoin/bitcoin/blob/2c79abc7ad4850e9e3ba32a04c530155cda7f980/src/script/interpreter.cpp#L1950-L1951
+        if (vout.scriptpubkey.startsWith('00') || !this.isWitnessProgram(vout.scriptpubkey)) {
+          return true;
+        }
       } else if (vout.scriptpubkey_type === 'multisig') {
         if (!DEFAULT_PERMIT_BAREMULTISIG) {
           // bare-multisig
@@ -286,7 +296,7 @@ export class Common {
         dustSize += getVarIntLength(dustSize);
         // add value size
         dustSize += 8;
-        if (['v0_p2wpkh', 'v0_p2wsh', 'v1_p2tr'].includes(vout.scriptpubkey_type)) {
+        if (Common.isWitnessProgram(vout.scriptpubkey)) {
           dustSize += 67;
         } else {
           dustSize += 148;
@@ -308,6 +318,70 @@ export class Common {
     return false;
   }
 
+  // A witness program is any valid scriptpubkey that consists of a 1-byte push opcode
+  // followed by a data push between 2 and 40 bytes.
+  // https://github.com/bitcoin/bitcoin/blob/2c79abc7ad4850e9e3ba32a04c530155cda7f980/src/script/script.cpp#L224-L240
+  static isWitnessProgram(scriptpubkey: string): false | { version: number, program: string } {
+    if (scriptpubkey.length < 8 || scriptpubkey.length > 84) {
+      return false;
+    }
+    const version = parseInt(scriptpubkey.slice(0,2), 16);
+    if (version !== 0 && version < 0x51 || version > 0x60) {
+        return false;
+    }
+    const push = parseInt(scriptpubkey.slice(2,4), 16);
+    if (push + 2 === (scriptpubkey.length / 2)) {
+      return {
+        version: version ? version - 0x50 : 0,
+        program: scriptpubkey.slice(4),
+      };
+    }
+    return false;
+  }
+
+  // Individual versioned standardness rules
+
+  static V3_STANDARDNESS_ACTIVATION_HEIGHT = {
+    'testnet4': 42_000,
+    'testnet': 2_900_000,
+    'signet': 211_000,
+    '': 863_500,
+  };
+  static isNonStandardVersion(tx: TransactionExtended, height?: number): boolean {
+    let TX_MAX_STANDARD_VERSION = 3;
+    if (
+      height != null
+      && this.V3_STANDARDNESS_ACTIVATION_HEIGHT[config.MEMPOOL.NETWORK]
+      && height <= this.V3_STANDARDNESS_ACTIVATION_HEIGHT[config.MEMPOOL.NETWORK]
+    ) {
+      // V3 transactions were non-standard to spend before v28.x (scheduled for 2024/09/30 https://github.com/bitcoin/bitcoin/issues/29891)
+      TX_MAX_STANDARD_VERSION = 2;
+    }
+
+    if (tx.version > TX_MAX_STANDARD_VERSION) {
+      return true;
+    }
+    return false;
+  }
+
+  static ANCHOR_STANDARDNESS_ACTIVATION_HEIGHT = {
+    'testnet4': 42_000,
+    'testnet': 2_900_000,
+    'signet': 211_000,
+    '': 863_500,
+  };
+  static isNonStandardAnchor(tx: TransactionExtended, height?: number): boolean {
+    if (
+      height != null
+      && this.ANCHOR_STANDARDNESS_ACTIVATION_HEIGHT[config.MEMPOOL.NETWORK]
+      && height <= this.ANCHOR_STANDARDNESS_ACTIVATION_HEIGHT[config.MEMPOOL.NETWORK]
+    ) {
+      // anchor outputs were non-standard to spend before v28.x (scheduled for 2024/09/30 https://github.com/bitcoin/bitcoin/issues/29891)
+      return true;
+    }
+    return false;
+  }
+
   static getNonWitnessSize(tx: TransactionExtended): number {
     let weight = tx.weight;
     let hasWitness = false;
@@ -388,16 +462,19 @@ export class Common {
     return flags;
   }
 
-  static getTransactionFlags(tx: TransactionExtended): number {
+  static getTransactionFlags(tx: TransactionExtended, height?: number): number {
     let flags = tx.flags ? BigInt(tx.flags) : 0n;
 
     // Update variable flags (CPFP, RBF)
+    flags &= ~TransactionFlags.cpfp_child;
     if (tx.ancestors?.length) {
       flags |= TransactionFlags.cpfp_child;
     }
+    flags &= ~TransactionFlags.cpfp_parent;
     if (tx.descendants?.length) {
       flags |= TransactionFlags.cpfp_parent;
     }
+    flags &= ~TransactionFlags.replacement;
     if (tx.replacement) {
       flags |= TransactionFlags.replacement;
     }
@@ -433,11 +510,10 @@ export class Common {
           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;
-            flags = Common.isInscription(vin, flags);
+            if (vin.witness?.length) {
+              flags = Common.isInscription(vin, flags);
+            }
           } break;
         }
       } else {
@@ -519,7 +595,7 @@ export class Common {
     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;
@@ -535,17 +611,17 @@ export class Common {
       flags |= TransactionFlags.batch_payout;
     }
 
-    if (this.isNonStandard(tx)) {
+    if (this.isNonStandard(tx, height)) {
       flags |= TransactionFlags.nonstandard;
     }
 
     return Number(flags);
   }
 
-  static classifyTransaction(tx: TransactionExtended): TransactionClassified {
+  static classifyTransaction(tx: TransactionExtended, height?: number): TransactionClassified {
     let flags = 0;
     try {
-      flags = Common.getTransactionFlags(tx);
+      flags = Common.getTransactionFlags(tx, height);
     } catch (e) {
       logger.warn('Failed to add classification flags to transaction: ' + (e instanceof Error ? e.message : e));
     }
@@ -556,8 +632,8 @@ export class Common {
     };
   }
 
-  static classifyTransactions(txs: TransactionExtended[]): TransactionClassified[] {
+  static classifyTransactions(txs: TransactionExtended[], height?: number): TransactionClassified[] {
-    return txs.map(Common.classifyTransaction);
+    return txs.map(tx => Common.classifyTransaction(tx, height));
   }
 
   static stripTransaction(tx: TransactionExtended): TransactionStripped {
@@ -780,96 +856,6 @@ export class Common {
     }
   }
 
-  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: { [txid: string]: TransactionExtended } = {};
-    // initialize the txMap
-    for (const tx of transactions) {
-      txMap[tx.txid] = tx;
-    }
-    // reverse pass to identify CPFP clusters
-    for (let i = transactions.length - 1; i >= 0; i--) {
-      const tx = transactions[i];
-      if (!ancestors[tx.txid]) {
-        let totalFee = 0;
-        let totalVSize = 0;
-        clusterTxs.forEach(tx => {
-          totalFee += tx?.fee || 0;
-          totalVSize += (tx.weight / 4);
-        });
-        const effectiveFeePerVsize = totalFee / totalVSize;
-        let cluster: CpfpCluster;
-        if (clusterTxs.length > 1) {
-          cluster = {
-            root: clusterTxs[0].txid,
-            height,
-            txs: clusterTxs.map(tx => { return { txid: tx.txid, weight: tx.weight, fee: tx.fee || 0 }; }),
-            effectiveFeePerVsize,
-          };
-          clusters.push(cluster);
-        }
-        clusterTxs.forEach(tx => {
-          txMap[tx.txid].effectiveFeePerVsize = effectiveFeePerVsize;
-          if (cluster) {
-            clusterMap[tx.txid] = cluster;
-          }
-        });
-        // reset working vars
-        clusterTxs = [];
-        ancestors = {};
-      }
-      clusterTxs.push(tx);
-      tx.vin.forEach(vin => {
-        ancestors[vin.txid] = true;
-      });
-    }
-    // forward pass to enforce ancestor rate caps
-    for (const tx of transactions) {
-      let minAncestorRate = tx.effectiveFeePerVsize;
-      for (const vin of tx.vin) {
-        if (txMap[vin.txid]?.effectiveFeePerVsize) {
-          minAncestorRate = Math.min(minAncestorRate, txMap[vin.txid].effectiveFeePerVsize);
-        }
-      }
-      // check rounded values to skip cases with almost identical fees
-      const roundedMinAncestorRate = Math.ceil(minAncestorRate);
-      const roundedEffectiveFeeRate = Math.floor(tx.effectiveFeePerVsize);
-      if (roundedMinAncestorRate < roundedEffectiveFeeRate) {
-        tx.effectiveFeePerVsize = minAncestorRate;
-        if (!clusterMap[tx.txid]) {
-          // add a single-tx cluster to record the dependent rate
-          const cluster = {
-            root: tx.txid,
-            height,
-            txs: [{ txid: tx.txid, weight: tx.weight, fee: tx.fee || 0 }],
-            effectiveFeePerVsize: minAncestorRate,
-          };
-          clusterMap[tx.txid] = cluster;
-          clusters.push(cluster);
-        } else {
-          // update the existing cluster with the dependent rate
-          clusterMap[tx.txid].effectiveFeePerVsize = minAncestorRate;
-        }
-      }
-    }
-    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,
-    };
-  }
-
   static calcEffectiveFeeStatistics(transactions: { weight: number, fee: number, effectiveFeePerVsize?: number, txid: string, acceleration?: boolean }[]): EffectiveFeeStats {
     const sortedTxs = transactions.map(tx => { return { txid: tx.txid, weight: tx.weight, rate: tx.effectiveFeePerVsize || ((tx.fee || 0) / (tx.weight / 4)) }; }).sort((a, b) => a.rate - b.rate);
 
@@ -877,9 +863,10 @@ export class Common {
     let medianFee = 0;
     let medianWeight = 0;
 
-    // calculate the "medianFee" as the average fee rate of the middle 10000 weight units of transactions
+    // calculate the "medianFee" as the average fee rate of the middle 0.25% weight units of transactions
-    const leftBound = 1995000;
+    const halfWidth = config.MEMPOOL.BLOCK_WEIGHT_UNITS / 800;
-    const rightBound = 2005000;
+    const leftBound = Math.floor((config.MEMPOOL.BLOCK_WEIGHT_UNITS / 2) - halfWidth);
+    const rightBound = Math.ceil((config.MEMPOOL.BLOCK_WEIGHT_UNITS / 2) + halfWidth);
     for (let i = 0; i < sortedTxs.length && weightCount < rightBound; i++) {
       const left = weightCount;
       const right = weightCount + sortedTxs[i].weight;

backend/src/api/cpfp.ts

@@ -1,29 +1,174 @@
-import { CpfpInfo, MempoolTransactionExtended } from '../mempool.interfaces';
+import { Ancestor, CpfpCluster, CpfpInfo, CpfpSummary, MempoolTransactionExtended, TransactionExtended } from '../mempool.interfaces';
+import { GraphTx, convertToGraphTx, expandRelativesGraph, initializeRelatives, makeBlockTemplate, mempoolComparator, removeAncestors, setAncestorScores } from './mini-miner';
 import memPool from './mempool';
+import { Acceleration } from './acceleration/acceleration';
 
 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
+const MAX_CLUSTER_ITERATIONS = 100;
 
-interface GraphTx extends MempoolTransactionExtended {
+export function calculateFastBlockCpfp(height: number, transactions: MempoolTransactionExtended[], saveRelatives: boolean = false): CpfpSummary {
-  depends: string[];
+  const clusters: CpfpCluster[] = []; // list of all cpfp clusters in this block
-  spentby: string[];
+  const clusterMap: { [txid: string]: CpfpCluster } = {}; // map transactions to their cpfp cluster
-  ancestorMap: Map<string, GraphTx>;
+  let clusterTxs: TransactionExtended[] = []; // working list of elements of the current cluster
-  fees: {
+  let ancestors: { [txid: string]: boolean } = {}; // working set of ancestors of the current cluster root
-    base: number;
+  const txMap: { [txid: string]: TransactionExtended } = {};
-    ancestor: number;
+  // initialize the txMap
+  for (const tx of transactions) {
+    txMap[tx.txid] = tx;
+  }
+  // reverse pass to identify CPFP clusters
+  for (let i = transactions.length - 1; i >= 0; i--) {
+    const tx = transactions[i];
+    if (!ancestors[tx.txid]) {
+      let totalFee = 0;
+      let totalVSize = 0;
+      clusterTxs.forEach(tx => {
+        totalFee += tx?.fee || 0;
+        totalVSize += (tx.weight / 4);
+      });
+      const effectiveFeePerVsize = totalFee / totalVSize;
+      let cluster: CpfpCluster;
+      if (clusterTxs.length > 1) {
+        cluster = {
+          root: clusterTxs[0].txid,
+          height,
+          txs: clusterTxs.map(tx => { return { txid: tx.txid, weight: tx.weight, fee: tx.fee || 0 }; }),
+          effectiveFeePerVsize,
+        };
+        clusters.push(cluster);
+      }
+      clusterTxs.forEach(tx => {
+        txMap[tx.txid].effectiveFeePerVsize = effectiveFeePerVsize;
+        if (cluster) {
+          clusterMap[tx.txid] = cluster;
+        }
+      });
+      // reset working vars
+      clusterTxs = [];
+      ancestors = {};
+    }
+    clusterTxs.push(tx);
+    tx.vin.forEach(vin => {
+      ancestors[vin.txid] = true;
+    });
+  }
+  // forward pass to enforce ancestor rate caps
+  for (const tx of transactions) {
+    let minAncestorRate = tx.effectiveFeePerVsize;
+    for (const vin of tx.vin) {
+      if (txMap[vin.txid]?.effectiveFeePerVsize) {
+        minAncestorRate = Math.min(minAncestorRate, txMap[vin.txid].effectiveFeePerVsize);
+      }
+    }
+    // check rounded values to skip cases with almost identical fees
+    const roundedMinAncestorRate = Math.ceil(minAncestorRate);
+    const roundedEffectiveFeeRate = Math.floor(tx.effectiveFeePerVsize);
+    if (roundedMinAncestorRate < roundedEffectiveFeeRate) {
+      tx.effectiveFeePerVsize = minAncestorRate;
+      if (!clusterMap[tx.txid]) {
+        // add a single-tx cluster to record the dependent rate
+        const cluster = {
+          root: tx.txid,
+          height,
+          txs: [{ txid: tx.txid, weight: tx.weight, fee: tx.fee || 0 }],
+          effectiveFeePerVsize: minAncestorRate,
+        };
+        clusterMap[tx.txid] = cluster;
+        clusters.push(cluster);
+      } else {
+        // update the existing cluster with the dependent rate
+        clusterMap[tx.txid].effectiveFeePerVsize = minAncestorRate;
+      }
+    }
+  }
+  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,
+    version: 1,
+  };
+}
+
+export function calculateGoodBlockCpfp(height: number, transactions: MempoolTransactionExtended[], accelerations: Acceleration[]): CpfpSummary {
+  const txMap: { [txid: string]: MempoolTransactionExtended } = {};
+  for (const tx of transactions) {
+    txMap[tx.txid] = tx;
+  }
+  const template = makeBlockTemplate(transactions, accelerations, 1, Infinity, Infinity);
+  const clusters = new Map<string, string[]>();
+  for (const tx of template) {
+    const cluster = tx.cluster || [];
+    const root = cluster.length ? cluster[cluster.length - 1] : null;
+    if (cluster.length > 1 && root && !clusters.has(root)) {
+      clusters.set(root, cluster);
+    }
+    txMap[tx.txid].effectiveFeePerVsize = tx.effectiveFeePerVsize;
+  }
+
+  const clusterArray: CpfpCluster[] = [];
+
+  for (const cluster of clusters.values()) {
+    for (const txid of cluster) {
+      const mempoolTx = txMap[txid];
+      if (mempoolTx) {
+        const ancestors: Ancestor[] = [];
+        const descendants: Ancestor[] = [];
+        let matched = false;
+        cluster.forEach(relativeTxid => {
+          if (relativeTxid === txid) {
+            matched = true;
+          } else {
+            const relative = {
+              txid: relativeTxid,
+              fee: txMap[relativeTxid].fee,
+              weight: (txMap[relativeTxid].adjustedVsize * 4) || txMap[relativeTxid].weight,
+            };
+            if (matched) {
+              descendants.push(relative);
+            } else {
+              ancestors.push(relative);
+            }
+          }
+        });
+        if (mempoolTx.ancestors?.length !== ancestors.length || mempoolTx.descendants?.length !== descendants.length) {
+          mempoolTx.cpfpDirty = true;
+        }
+        Object.assign(mempoolTx, { ancestors, descendants, bestDescendant: null, cpfpChecked: true });
+      }
+    }
+    const root = cluster[cluster.length - 1];
+    clusterArray.push({
+      root: root,
+      height,
+      txs: cluster.reverse().map(txid => ({
+        txid,
+        fee: txMap[txid].fee,
+        weight: (txMap[txid].adjustedVsize * 4) || txMap[txid].weight,
+      })),
+      effectiveFeePerVsize: txMap[root].effectiveFeePerVsize,
+    });
+  }
+
+  return {
+    transactions: transactions.map(tx => txMap[tx.txid]),
+    clusters: clusterArray,
+    version: 2,
   };
-  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 {
+export function calculateMempoolTxCpfp(tx: MempoolTransactionExtended, mempool: { [txid: string]: MempoolTransactionExtended }): CpfpInfo {
   if (tx.cpfpUpdated && Date.now() < (tx.cpfpUpdated + CPFP_UPDATE_INTERVAL)) {
     tx.cpfpDirty = false;
     return {
@@ -32,30 +177,31 @@ export function calculateCpfp(tx: MempoolTransactionExtended, mempool: { [txid:
       descendants: tx.descendants || [],
       effectiveFeePerVsize: tx.effectiveFeePerVsize || tx.adjustedFeePerVsize || tx.feePerVsize,
       sigops: tx.sigops,
+      fee: tx.fee,
       adjustedVsize: tx.adjustedVsize,
       acceleration: tx.acceleration
     };
   }
 
   const ancestorMap = new Map<string, GraphTx>();
-  const graphTx = mempoolToGraphTx(tx);
+  const graphTx = convertToGraphTx(tx, memPool.getSpendMap());
   ancestorMap.set(tx.txid, graphTx);
 
-  const allRelatives = expandRelativesGraph(mempool, ancestorMap);
+  const allRelatives = expandRelativesGraph(mempool, ancestorMap, memPool.getSpendMap());
   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;
+    totalVsize += tx.vsize;
-    totalFee += tx.fee;
+    totalFee += tx.fees.base;
   }
   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].ancestors = Array.from(tx.ancestors.values()).map(tx => ({ txid: tx.txid, weight: tx.weight, fee: tx.fees.base }));
-    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].descendants = Array.from(cluster.values()).filter(entry => entry.txid !== tx.txid && !tx.ancestors.has(entry.txid)).map(tx => ({ txid: tx.txid, weight: tx.weight, fee: tx.fees.base }));
     mempool[tx.txid].bestDescendant = null;
     mempool[tx.txid].cpfpChecked = true;
     mempool[tx.txid].cpfpDirty = true;
@@ -70,88 +216,12 @@ export function calculateCpfp(tx: MempoolTransactionExtended, mempool: { [txid:
     descendants: tx.descendants || [],
     effectiveFeePerVsize: tx.effectiveFeePerVsize || tx.adjustedFeePerVsize || tx.feePerVsize,
     sigops: tx.sigops,
+    fee: tx.fee,
     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
@@ -172,10 +242,10 @@ function calculateCpfpCluster(txid: string, graph: Map<string, GraphTx>): Map<st
   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 maxIterations = MAX_CLUSTER_ITERATIONS;
   let best = sortedRelatives.shift();
-  let bestCluster = new Map<string, GraphTx>(best?.ancestorMap?.entries() || []);
+  let bestCluster = new Map<string, GraphTx>(best?.ancestors?.entries() || []);
-  while (sortedRelatives.length && best && (best.txid !== tx.txid && !best.ancestorMap.has(tx.txid)) && maxIterations > 0) {
+  while (sortedRelatives.length && best && (best.txid !== tx.txid && !best.ancestors.has(tx.txid)) && maxIterations > 0) {
     maxIterations--;
     if ((best && best.txid === tx.txid) || (bestCluster && bestCluster.has(tx.txid))) {
       break;
@@ -190,7 +260,7 @@ function calculateCpfpCluster(txid: string, graph: Map<string, GraphTx>): Map<st
       // Grab the next highest scoring entry
       best = sortedRelatives.shift();
       if (best) {
-        bestCluster = new Map<string, GraphTx>(best?.ancestorMap?.entries() || []);
+        bestCluster = new Map<string, GraphTx>(best?.ancestors?.entries() || []);
         bestCluster.set(best?.txid, best);
       }
     }
@@ -199,88 +269,4 @@ function calculateCpfpCluster(txid: string, graph: Map<string, GraphTx>): Map<st
   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 = 79;
+  private static currentVersion = 82;
   private queryTimeout = 3600_000;
   private statisticsAddedIndexed = false;
   private uniqueLogs: string[] = [];
@@ -653,9 +653,11 @@ class DatabaseMigration {
       await this.$executeQuery('ALTER TABLE `prices` ADD `TRY` float DEFAULT "-1"');
       await this.$executeQuery('ALTER TABLE `prices` ADD `ZAR` float DEFAULT "-1"');
 
-      await this.$executeQuery('TRUNCATE hashrates');
+      if (isBitcoin === true) {
-      await this.$executeQuery('TRUNCATE difficulty_adjustments');
+        await this.$executeQuery('TRUNCATE hashrates');
-      await this.$executeQuery(`UPDATE state SET string = NULL WHERE name = 'pools_json_sha'`);
+        await this.$executeQuery('TRUNCATE difficulty_adjustments');
+        await this.$executeQuery(`UPDATE state SET string = NULL WHERE name = 'pools_json_sha'`);
+      }
 
       await this.updateToSchemaVersion(75);
     }
@@ -686,6 +688,23 @@ class DatabaseMigration {
       `);
       await this.updateToSchemaVersion(79);
     }
+
+    if (databaseSchemaVersion < 80) {
+      await this.$executeQuery('ALTER TABLE `blocks` ADD coinbase_addresses JSON DEFAULT NULL');
+      await this.updateToSchemaVersion(80);
+    }
+
+    if (databaseSchemaVersion < 81 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD version INT NOT NULL DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD INDEX `version` (`version`)');
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD unseen_txs JSON DEFAULT "[]"');
+      await this.updateToSchemaVersion(81);
+    }
+
+    if (databaseSchemaVersion < 82 && isBitcoin === true && config.MEMPOOL.NETWORK === 'mainnet') {
+      await this.$fixBadV1AuditBlocks();
+      await this.updateToSchemaVersion(82);
+    }
   }
 
   /**
@@ -1300,6 +1319,28 @@ class DatabaseMigration {
       logger.warn(`Failed to migrate cpfp transaction data`);
     }
   }
+
+  private async $fixBadV1AuditBlocks(): Promise<void> {
+    const badBlocks = [
+      '000000000000000000011ad49227fc8c9ba0ca96ad2ebce41a862f9a244478dc',
+      '000000000000000000010ac1f68b3080153f2826ffddc87ceffdd68ed97d6960',
+      '000000000000000000024cbdafeb2660ae8bd2947d166e7fe15d1689e86b2cf7',
+      '00000000000000000002e1dbfbf6ae057f331992a058b822644b368034f87286',
+      '0000000000000000000019973b2778f08ad6d21e083302ff0833d17066921ebb',
+    ];
+
+    for (const hash of badBlocks) {
+      try {
+        await this.$executeQuery(`
+          UPDATE blocks_audits
+          SET prioritized_txs = '[]'
+          WHERE hash = '${hash}'
+        `, true);
+      } catch (e) {
+        continue;
+      }
+    }
+  }
 }
 
 export default new DatabaseMigration();

backend/src/api/disk-cache.ts

@@ -257,6 +257,7 @@ class DiskCache {
           trees: rbfData.rbf.trees,
           expiring: rbfData.rbf.expiring.map(([txid, value]) => ({ key: txid, value })),
           mempool: memPool.getMempool(),
+          spendMap: memPool.getSpendMap(),
         });
       }
     } catch (e) {

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

@@ -1,6 +1,7 @@
 import config from '../../config';
 import { Application, Request, Response } from 'express';
 import channelsApi from './channels.api';
+import { handleError } from '../../utils/api';
 
 class ChannelsRoutes {
   constructor() { }
@@ -22,7 +23,7 @@ class ChannelsRoutes {
       const channels = await channelsApi.$searchChannelsById(req.params.search);
       res.json(channels);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -38,7 +39,7 @@ class ChannelsRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(channel);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -53,11 +54,11 @@ class ChannelsRoutes {
       const status: string = typeof req.query.status === 'string' ? req.query.status : '';
 
       if (index < -1) {
-        res.status(400).send('Invalid index');
+        handleError(req, res, 400, 'Invalid index');
         return;
       }
       if (['open', 'active', 'closed'].includes(status) === false) {
-        res.status(400).send('Invalid status');
+        handleError(req, res, 400, 'Invalid status');
         return;
       }
 
@@ -69,14 +70,14 @@ class ChannelsRoutes {
       res.header('X-Total-Count', channelsCount.toString());
       res.json(channels);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
   private async $getChannelsByTransactionIds(req: Request, res: Response): Promise<void> {
     try {
       if (!Array.isArray(req.query.txId)) {
-        res.status(400).send('Not an array');
+        handleError(req, res, 400, 'Not an array');
         return;
       }
       const txIds: string[] = [];
@@ -107,7 +108,7 @@ class ChannelsRoutes {
 
       res.json(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -119,7 +120,7 @@ class ChannelsRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(channels);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -132,7 +133,7 @@ class ChannelsRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(channels);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 

backend/src/api/explorer/general.routes.ts

@@ -3,6 +3,8 @@ import { Application, Request, Response } from 'express';
 import nodesApi from './nodes.api';
 import channelsApi from './channels.api';
 import statisticsApi from './statistics.api';
+import { handleError } from '../../utils/api';
+
 class GeneralLightningRoutes {
   constructor() { }
 
@@ -27,7 +29,7 @@ class GeneralLightningRoutes {
         channels: channels,
       });
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -41,7 +43,7 @@ class GeneralLightningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(statistics);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -50,7 +52,7 @@ class GeneralLightningRoutes {
       const statistics = await statisticsApi.$getLatestStatistics();
       res.json(statistics);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 }

backend/src/api/explorer/nodes.routes.ts

@@ -3,6 +3,7 @@ import { Application, Request, Response } from 'express';
 import nodesApi from './nodes.api';
 import DB from '../../database';
 import { INodesRanking } from '../../mempool.interfaces';
+import { handleError } from '../../utils/api';
 
 class NodesRoutes {
   constructor() { }
@@ -31,7 +32,7 @@ class NodesRoutes {
       const nodes = await nodesApi.$searchNodeByPublicKeyOrAlias(req.params.search);
       res.json(nodes);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -181,13 +182,13 @@ class NodesRoutes {
           }
         } catch (e) {}
       }
-      
+
       res.header('Pragma', 'public');
       res.header('Cache-control', 'public');
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(nodes);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -195,7 +196,7 @@ class NodesRoutes {
     try {
       const node = await nodesApi.$getNode(req.params.public_key);
       if (!node) {
-        res.status(404).send('Node not found');
+        handleError(req, res, 404, 'Node not found');
         return;
       }
       res.header('Pragma', 'public');
@@ -203,7 +204,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(node);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -215,7 +216,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(statistics);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -223,7 +224,7 @@ class NodesRoutes {
     try {
       const node = await nodesApi.$getFeeHistogram(req.params.public_key);
       if (!node) {
-        res.status(404).send('Node not found');
+        handleError(req, res, 404, 'Node not found');
         return;
       }
       res.header('Pragma', 'public');
@@ -231,7 +232,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(node);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -247,7 +248,7 @@ class NodesRoutes {
         topByChannels: topChannelsNodes,
       });
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -259,7 +260,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(topCapacityNodes);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -271,7 +272,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(topCapacityNodes);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -283,7 +284,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(topCapacityNodes);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -295,7 +296,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 600).toUTCString());
       res.json(nodesPerAs);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -307,7 +308,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 600).toUTCString());
       res.json(worldNodes);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -322,7 +323,7 @@ class NodesRoutes {
       );
 
       if (country.length === 0) {
-        res.status(404).send(`This country does not exist or does not host any lightning nodes on clearnet`);
+        handleError(req, res, 404, `This country does not exist or does not host any lightning nodes on clearnet`);
         return;
       }
 
@@ -335,7 +336,7 @@ class NodesRoutes {
         nodes: nodes,
       });
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -349,7 +350,7 @@ class NodesRoutes {
       );
 
       if (isp.length === 0) {
-        res.status(404).send(`This ISP does not exist or does not host any lightning nodes on clearnet`);
+        handleError(req, res, 404, `This ISP does not exist or does not host any lightning nodes on clearnet`);
         return;
       }
 
@@ -362,7 +363,7 @@ class NodesRoutes {
         nodes: nodes,
       });
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -374,7 +375,7 @@ class NodesRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 600).toUTCString());
       res.json(nodesPerAs);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 }

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

@@ -3,6 +3,7 @@ import { Application, Request, Response } from 'express';
 import config from '../../config';
 import elementsParser from './elements-parser';
 import icons from './icons';
+import { handleError } from '../../utils/api';
 
 class LiquidRoutes {
   public initRoutes(app: Application) {
@@ -42,7 +43,7 @@ class LiquidRoutes {
       res.setHeader('content-length', result.length);
       res.send(result);
     } else {
-      res.status(404).send('Asset icon not found');
+      handleError(req, res, 404, 'Asset icon not found');
     }
   }
 
@@ -51,7 +52,7 @@ class LiquidRoutes {
     if (result) {
       res.json(result);
     } else {
-      res.status(404).send('Asset icons not found');
+      handleError(req, res, 404, 'Asset icons not found');
     }
   }
 
@@ -82,7 +83,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -94,7 +95,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -106,7 +107,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -118,7 +119,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -130,7 +131,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -142,7 +143,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -154,7 +155,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -166,7 +167,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -178,7 +179,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -190,7 +191,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -202,7 +203,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -214,7 +215,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -226,7 +227,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -238,7 +239,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -250,7 +251,7 @@ class LiquidRoutes {
       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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 

backend/src/api/mempool-blocks.ts

@@ -1,11 +1,13 @@
 import { GbtGenerator, GbtResult, ThreadTransaction as RustThreadTransaction, ThreadAcceleration as RustThreadAcceleration } from 'rust-gbt';
 import logger from '../logger';
-import { MempoolBlock, MempoolTransactionExtended, MempoolBlockWithTransactions, MempoolBlockDelta, Ancestor, CompactThreadTransaction, EffectiveFeeStats, TransactionClassified, TransactionCompressed, MempoolDeltaChange, GbtCandidates } from '../mempool.interfaces';
+import { MempoolBlock, MempoolTransactionExtended, MempoolBlockWithTransactions, MempoolBlockDelta, Ancestor, CompactThreadTransaction, EffectiveFeeStats, TransactionClassified, TransactionCompressed, MempoolDeltaChange, GbtCandidates, PoolTag } from '../mempool.interfaces';
 import { Common, OnlineFeeStatsCalculator } from './common';
 import config from '../config';
 import { Worker } from 'worker_threads';
 import path from 'path';
 import mempool from './mempool';
+import { Acceleration } from './services/acceleration';
+import PoolsRepository from '../repositories/PoolsRepository';
 
 const MAX_UINT32 = Math.pow(2, 32) - 1;
 
@@ -14,12 +16,14 @@ class MempoolBlocks {
   private mempoolBlockDeltas: MempoolBlockDelta[] = [];
   private txSelectionWorker: Worker | null = null;
   private rustInitialized: boolean = false;
-  private rustGbtGenerator: GbtGenerator = new GbtGenerator();
+  private rustGbtGenerator: GbtGenerator = new GbtGenerator(config.MEMPOOL.BLOCK_WEIGHT_UNITS, config.MEMPOOL.MEMPOOL_BLOCKS_AMOUNT);
 
   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
 
+  private pools: { [id: number]: PoolTag } = {};
+
   public getMempoolBlocks(): MempoolBlock[] {
     return this.mempoolBlocks.map((block) => {
       return {
@@ -41,6 +45,18 @@ class MempoolBlocks {
     return this.mempoolBlockDeltas;
   }
 
+  public async updatePools$(): Promise<void> {
+    if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK) === false) {
+      this.pools = {};
+      return;
+    }
+    const allPools = await PoolsRepository.$getPools();
+    this.pools = {};
+    for (const pool of allPools) {
+      this.pools[pool.uniqueId] = pool;
+    }
+  }
+
   private calculateMempoolDeltas(prevBlocks: MempoolBlockWithTransactions[], mempoolBlocks: MempoolBlockWithTransactions[]): MempoolBlockDelta[] {
     const mempoolBlockDeltas: MempoolBlockDelta[] = [];
     for (let i = 0; i < Math.max(mempoolBlocks.length, prevBlocks.length); i++) {
@@ -214,7 +230,7 @@ class MempoolBlocks {
 
   private resetRustGbt(): void {
     this.rustInitialized = false;
-    this.rustGbtGenerator = new GbtGenerator();
+    this.rustGbtGenerator = new GbtGenerator(config.MEMPOOL.BLOCK_WEIGHT_UNITS, config.MEMPOOL.MEMPOOL_BLOCKS_AMOUNT);
   }
 
   public async $rustMakeBlockTemplates(txids: string[], newMempool: { [txid: string]: MempoolTransactionExtended }, candidates: GbtCandidates | undefined, saveResults: boolean = false, useAccelerations: boolean = false, accelerationPool?: number): Promise<MempoolBlockWithTransactions[]> {
@@ -246,7 +262,7 @@ class MempoolBlocks {
     });
 
     // run the block construction algorithm in a separate thread, and wait for a result
-    const rustGbt = saveResults ? this.rustGbtGenerator : new GbtGenerator();
+    const rustGbt = saveResults ? this.rustGbtGenerator : new GbtGenerator(config.MEMPOOL.BLOCK_WEIGHT_UNITS, config.MEMPOOL.MEMPOOL_BLOCKS_AMOUNT);
     try {
       const { blocks, blockWeights, rates, clusters, overflow } = this.convertNapiResultTxids(
         await rustGbt.make(transactions as RustThreadTransaction[], convertedAccelerations as RustThreadAcceleration[], this.nextUid),
@@ -333,10 +349,13 @@ class MempoolBlocks {
     }
   }
 
-  private processBlockTemplates(mempool: { [txid: string]: MempoolTransactionExtended }, blocks: string[][], blockWeights: number[] | null, rates: [string, number][], clusters: string[][], candidates: GbtCandidates | undefined, accelerations, accelerationPool, saveResults): MempoolBlockWithTransactions[] {
+  private processBlockTemplates(mempool: { [txid: string]: MempoolTransactionExtended }, blocks: string[][], blockWeights: number[] | null, rates: [string, number][], clusters: string[][], candidates: GbtCandidates | undefined, accelerations: { [txid: string]: Acceleration }, accelerationPool, saveResults): MempoolBlockWithTransactions[] {
     for (const txid of Object.keys(candidates?.txs ?? mempool)) {
       if (txid in mempool) {
         mempool[txid].cpfpDirty = false;
+        mempool[txid].ancestors = [];
+        mempool[txid].descendants = [];
+        mempool[txid].bestDescendant = null;
       }
     }
     for (const [txid, rate] of rates) {
@@ -350,7 +369,7 @@ class MempoolBlocks {
     const lastBlockIndex = blocks.length - 1;
     let hasBlockStack = blocks.length >= 8;
     let stackWeight;
-    let feeStatsCalculator: OnlineFeeStatsCalculator | void;
+    let feeStatsCalculator: OnlineFeeStatsCalculator | null = null;
     if (hasBlockStack) {
       if (blockWeights && blockWeights[7] !== null) {
         stackWeight = blockWeights[7];
@@ -361,28 +380,36 @@ class MempoolBlocks {
       feeStatsCalculator = new OnlineFeeStatsCalculator(stackWeight, 0.5, [10, 20, 30, 40, 50, 60, 70, 80, 90]);
     }
 
+    const ancestors: Ancestor[] = [];
+    const descendants: Ancestor[] = [];
+    let ancestor: MempoolTransactionExtended
     for (const cluster of clusters) {
       for (const memberTxid of cluster) {
         const mempoolTx = mempool[memberTxid];
         if (mempoolTx) {
-          const ancestors: Ancestor[] = [];
+          // ugly micro-optimization to avoid allocating new arrays
-          const descendants: Ancestor[] = [];
+          ancestors.length = 0;
+          descendants.length = 0;
           let matched = false;
           cluster.forEach(txid => {
+            ancestor = mempool[txid];
             if (txid === memberTxid) {
               matched = true;
             } else {
-              if (!mempool[txid]) {
+              if (!ancestor) {
                 console.log('txid missing from mempool! ', txid, candidates?.txs[txid]);
+                return;
               }
               const relative = {
                 txid: txid,
-                fee: mempool[txid].fee,
+                fee: ancestor.fee,
-                weight: (mempool[txid].adjustedVsize * 4),
+                weight: (ancestor.adjustedVsize * 4),
               };
               if (matched) {
                 descendants.push(relative);
-                mempoolTx.lastBoosted = Math.max(mempoolTx.lastBoosted || 0, mempool[txid].firstSeen || 0);
+                if (!mempoolTx.lastBoosted || (ancestor.firstSeen && ancestor.firstSeen > mempoolTx.lastBoosted)) {
+                  mempoolTx.lastBoosted = ancestor.firstSeen;
+                }
               } else {
                 ancestors.push(relative);
               }
@@ -391,17 +418,33 @@ class MempoolBlocks {
           if (mempoolTx.ancestors?.length !== ancestors.length || mempoolTx.descendants?.length !== descendants.length) {
             mempoolTx.cpfpDirty = true;
           }
-          Object.assign(mempoolTx, {ancestors, descendants, bestDescendant: null, cpfpChecked: true});
+          // ugly micro-optimization to avoid allocating new arrays or objects
+          if (mempoolTx.ancestors) {
+            mempoolTx.ancestors.length = 0;
+          } else {
+            mempoolTx.ancestors = [];
+          }
+          if (mempoolTx.descendants) {
+            mempoolTx.descendants.length = 0;
+          } else {
+            mempoolTx.descendants = [];
+          }
+          mempoolTx.ancestors.push(...ancestors);
+          mempoolTx.descendants.push(...descendants);
+          mempoolTx.cpfpChecked = true;
         }
       }
     }
 
-    const isAccelerated : { [txid: string]: boolean } = {};
+    const isAcceleratedBy : { [txid: string]: number[] | false } = {};
 
     const sizeLimit = (config.MEMPOOL.BLOCK_WEIGHT_UNITS / 4) * 1.2;
     // update this thread's mempool with the results
     let mempoolTx: MempoolTransactionExtended;
-    const mempoolBlocks: MempoolBlockWithTransactions[] = blocks.map((block, blockIndex) => {
+    let acceleration: Acceleration;
+    const mempoolBlocks: MempoolBlockWithTransactions[] = [];
+    for (let blockIndex = 0; blockIndex < blocks.length; blockIndex++) {
+      const block = blocks[blockIndex];
       let totalSize = 0;
       let totalVsize = 0;
       let totalWeight = 0;
@@ -417,7 +460,8 @@ class MempoolBlocks {
         }
       }
 
-      for (const txid of block) {
+      for (let i = 0; i < block.length; i++) {
+        const txid = block[i];
         if (txid) {
           mempoolTx = mempool[txid];
           // save position in projected blocks
@@ -426,24 +470,37 @@ class MempoolBlocks {
             vsize: totalVsize + (mempoolTx.vsize / 2),
           };
 
-          const acceleration = accelerations[txid];
+          if (txid in accelerations) {
-          if (isAccelerated[txid] || (acceleration && (!accelerationPool || acceleration.pools.includes(accelerationPool)))) {
+            acceleration = accelerations[txid];
-            if (!mempoolTx.acceleration) {
+            if (isAcceleratedBy[txid] || (acceleration && (!accelerationPool || acceleration.pools.includes(accelerationPool)))) {
-              mempoolTx.cpfpDirty = true;
+              if (!mempoolTx.acceleration) {
-            }
+                mempoolTx.cpfpDirty = true;
-            mempoolTx.acceleration = true;
+              }
-            for (const ancestor of mempoolTx.ancestors || []) {
+              mempoolTx.acceleration = true;
-              if (!mempool[ancestor.txid].acceleration) {
+              mempoolTx.acceleratedBy = isAcceleratedBy[txid] || acceleration?.pools;
-                mempool[ancestor.txid].cpfpDirty = true;
+              mempoolTx.acceleratedAt = acceleration?.added;
+              mempoolTx.feeDelta = acceleration?.feeDelta;
+              for (const ancestor of mempoolTx.ancestors || []) {
+                if (!mempool[ancestor.txid].acceleration) {
+                  mempool[ancestor.txid].cpfpDirty = true;
+                }
+                mempool[ancestor.txid].acceleration = true;
+                mempool[ancestor.txid].acceleratedBy = mempoolTx.acceleratedBy;
+                mempool[ancestor.txid].acceleratedAt = mempoolTx.acceleratedAt;
+                mempool[ancestor.txid].feeDelta = mempoolTx.feeDelta;
+                isAcceleratedBy[ancestor.txid] = mempoolTx.acceleratedBy;
+              }
+            } else {
+              if (mempoolTx.acceleration) {
+                mempoolTx.cpfpDirty = true;
+                delete mempoolTx.acceleration;
               }
-              mempool[ancestor.txid].acceleration = true;
-              isAccelerated[ancestor.txid] = true;
             }
           } else {
             if (mempoolTx.acceleration) {
               mempoolTx.cpfpDirty = true;
+              delete mempoolTx.acceleration;
             }
-            delete mempoolTx.acceleration;
           }
 
           // online calculation of stack-of-blocks fee stats
@@ -461,7 +518,7 @@ class MempoolBlocks {
           }
         }
       }
-      return this.dataToMempoolBlocks(
+      mempoolBlocks[blockIndex] = this.dataToMempoolBlocks(
         block,
         transactions,
         totalSize,
@@ -469,13 +526,13 @@ class MempoolBlocks {
         totalFees,
         (hasBlockStack && blockIndex === lastBlockIndex && feeStatsCalculator) ? feeStatsCalculator.getRawFeeStats() : undefined,
       );
-    });
+    };
 
     if (saveResults) {
       const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, mempoolBlocks);
       this.mempoolBlocks = mempoolBlocks;
       this.mempoolBlockDeltas = deltas;
-
+      this.updateAccelerationPositions(mempool, accelerations, mempoolBlocks);
     }
 
     return mempoolBlocks;
@@ -622,6 +679,124 @@ class MempoolBlocks {
       tx.acc ? 1 : 0,
     ];
   }
+
+  // estimates and saves positions of accelerations in mining partner mempools
+  private updateAccelerationPositions(mempoolCache: { [txid: string]: MempoolTransactionExtended }, accelerations: { [txid: string]: Acceleration }, mempoolBlocks: MempoolBlockWithTransactions[]): void {
+    const accelerationPositions: { [txid: string]: { poolId: number, pool: string, block: number, vsize: number }[] } = {};
+    // keep track of simulated mempool blocks for each active pool
+    const pools: {
+      [pool: string]: { name: string, block: number, vsize: number, accelerations: string[], complete: boolean };
+    } = {};
+    // prepare a list of accelerations in ascending order (we'll pop items off the end of the list)
+    const accQueue: { acceleration: Acceleration, rate: number, vsize: number }[] = Object.values(accelerations).map(acc => {
+      let vsize = mempoolCache[acc.txid].vsize;
+      for (const ancestor of mempoolCache[acc.txid].ancestors || []) {
+        vsize += (ancestor.weight / 4);
+      }
+      return {
+        acceleration: acc,
+        rate: mempoolCache[acc.txid].effectiveFeePerVsize,
+        vsize
+      };
+    }).sort((a, b) => a.rate - b.rate);
+    // initialize the pool tracker
+    for (const { acceleration }  of accQueue) {
+      accelerationPositions[acceleration.txid] = [];
+      for (const pool of acceleration.pools) {
+        if (!pools[pool]) {
+          pools[pool] = {
+            name: this.pools[pool]?.name || 'unknown',
+            block: 0,
+            vsize: 0,
+            accelerations: [],
+            complete: false,
+          };
+        }
+        pools[pool].accelerations.push(acceleration.txid);
+      }
+      for (const ancestor of mempoolCache[acceleration.txid].ancestors || []) {
+        accelerationPositions[ancestor.txid] = [];
+      }
+    }
+
+    for (const pool of Object.keys(pools)) {
+      // if any pools accepted *every* acceleration, we can just use the GBT result positions directly
+      if (pools[pool].accelerations.length === Object.keys(accelerations).length) {
+        pools[pool].complete = true;
+      }
+    }
+
+    let block = 0;
+    let index = 0;
+    let next = accQueue.pop();
+    // build simulated blocks for each pool by taking the best option from
+    // either the mempool or the list of accelerations.
+    while (next && block < mempoolBlocks.length) {
+      while (next && index < mempoolBlocks[block].transactions.length) {
+        const nextTx = mempoolBlocks[block].transactions[index];
+        if (next.rate >= (nextTx.rate || (nextTx.fee / nextTx.vsize))) {
+          for (const pool of next.acceleration.pools) {
+            if (pools[pool].vsize + next.vsize <= 999_000) {
+              pools[pool].vsize += next.vsize;
+            } else {
+              pools[pool].block++;
+              pools[pool].vsize = next.vsize;
+            }
+            // insert the acceleration into matching pool's blocks
+            if (pools[pool].complete && mempoolCache[next.acceleration.txid]?.position !== undefined) {
+              accelerationPositions[next.acceleration.txid].push({
+                ...mempoolCache[next.acceleration.txid].position as { block: number, vsize: number },
+                poolId: pool,
+                pool: pools[pool].name
+              });
+            } else {
+              accelerationPositions[next.acceleration.txid].push({
+                poolId: pool,
+                pool: pools[pool].name,
+                block: pools[pool].block,
+                vsize: pools[pool].vsize - (next.vsize / 2),
+              });
+            }
+            // and any accelerated ancestors
+            for (const ancestor of mempoolCache[next.acceleration.txid].ancestors || []) {
+              if (pools[pool].complete && mempoolCache[ancestor.txid]?.position !== undefined) {
+                accelerationPositions[ancestor.txid].push({
+                  ...mempoolCache[ancestor.txid].position as { block: number, vsize: number },
+                  poolId: pool,
+                  pool: pools[pool].name,
+                });
+              } else {
+                accelerationPositions[ancestor.txid].push({
+                  poolId: pool,
+                  pool: pools[pool].name,
+                  block: pools[pool].block,
+                  vsize: pools[pool].vsize - (next.vsize / 2),
+                });
+              }
+            }
+          }
+          next = accQueue.pop();
+        } else {
+          // skip accelerated transactions and their CPFP ancestors
+          if (accelerationPositions[nextTx.txid] == null) {
+            // insert into all pools' blocks
+            for (const pool of Object.keys(pools)) {
+              if (pools[pool].vsize + nextTx.vsize <= 999_000) {
+                pools[pool].vsize += nextTx.vsize;
+              } else {
+                pools[pool].block++;
+                pools[pool].vsize = nextTx.vsize;
+              }
+            }
+          }
+          index++;
+        }
+      }
+      block++;
+      index = 0;
+    }
+    mempool.setAccelerationPositions(accelerationPositions);
+  }
 }
 
 export default new MempoolBlocks();

backend/src/api/mempool.ts

@@ -19,14 +19,16 @@ class Mempool {
   private mempoolCache: { [txId: string]: MempoolTransactionExtended } = {};
   private mempoolCandidates: { [txid: string ]: boolean } = {};
   private spendMap = new Map<string, MempoolTransactionExtended>();
+  private recentlyDeleted: MempoolTransactionExtended[][] = []; // buffer of transactions deleted in recent mempool updates
   private mempoolInfo: IBitcoinApi.MempoolInfo = { loaded: false, size: 0, bytes: 0, usage: 0, total_fee: 0,
                                                     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;
+    deletedTransactions: MempoolTransactionExtended[][], accelerationDelta: string[]) => void) | undefined;
   private $asyncMempoolChangedCallback: ((newMempool: {[txId: string]: MempoolTransactionExtended; }, mempoolSize: number, newTransactions: MempoolTransactionExtended[],
-    deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[], candidates?: GbtCandidates) => Promise<void>) | undefined;
+    deletedTransactions: MempoolTransactionExtended[][], accelerationDelta: string[], candidates?: GbtCandidates) => Promise<void>) | undefined;
 
   private accelerations: { [txId: string]: Acceleration } = {};
+  private accelerationPositions: { [txid: string]: { poolId: number, pool: string, block: number, vsize: number }[] } = {};
 
   private txPerSecondArray: number[] = [];
   private txPerSecond: number = 0;
@@ -73,12 +75,12 @@ class Mempool {
   }
 
   public setMempoolChangedCallback(fn: (newMempool: { [txId: string]: MempoolTransactionExtended; },
-    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[]) => void): void {
+    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[][], accelerationDelta: string[]) => void): void {
     this.mempoolChangedCallback = fn;
   }
 
   public setAsyncMempoolChangedCallback(fn: (newMempool: { [txId: string]: MempoolTransactionExtended; }, mempoolSize: number,
-    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[],
+    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[][], accelerationDelta: string[],
     candidates?: GbtCandidates) => Promise<void>): void {
     this.$asyncMempoolChangedCallback = fn;
   }
@@ -361,12 +363,15 @@ class Mempool {
 
     const candidatesChanged = candidates?.added?.length || candidates?.removed?.length;
 
-    if (this.mempoolChangedCallback && (hasChange || deletedTransactions.length)) {
+    this.recentlyDeleted.unshift(deletedTransactions);
-      this.mempoolChangedCallback(this.mempoolCache, newTransactions, deletedTransactions, accelerationDelta);
+    this.recentlyDeleted.length = Math.min(this.recentlyDeleted.length, 10); // truncate to the last 10 mempool updates
+
+    if (this.mempoolChangedCallback && (hasChange || newTransactions.length || deletedTransactions.length)) {
+      this.mempoolChangedCallback(this.mempoolCache, newTransactions, this.recentlyDeleted, accelerationDelta);
     }
-    if (this.$asyncMempoolChangedCallback && (hasChange || deletedTransactions.length || candidatesChanged)) {
+    if (this.$asyncMempoolChangedCallback && (hasChange || newTransactions.length || deletedTransactions.length || candidatesChanged)) {
       this.updateTimerProgress(timer, 'running async mempool callback');
-      await this.$asyncMempoolChangedCallback(this.mempoolCache, newMempoolSize, newTransactions, deletedTransactions, accelerationDelta, candidates);
+      await this.$asyncMempoolChangedCallback(this.mempoolCache, newMempoolSize, newTransactions, this.recentlyDeleted, accelerationDelta, candidates);
       this.updateTimerProgress(timer, 'completed async mempool callback');
     }
 
@@ -395,10 +400,6 @@ class Mempool {
   }
 
   public $updateAccelerations(newAccelerations: Acceleration[]): string[] {
-    if (!config.MEMPOOL_SERVICES.ACCELERATIONS) {
-      return [];
-    }
-
     try {
       const changed: string[] = [];
 
@@ -514,6 +515,14 @@ class Mempool {
     }
   }
 
+  setAccelerationPositions(positions: { [txid: string]: { poolId: number, pool: string, block: number, vsize: number }[] }): void {
+    this.accelerationPositions = positions;
+  }
+
+  getAccelerationPositions(txid: string): { [pool: number]: { poolId: number, pool: string, block: number, vsize: number } } | undefined {
+    return this.accelerationPositions[txid];
+  }
+
   private startTimer() {
     const state: any = {
       start: Date.now(),
@@ -536,16 +545,7 @@ class Mempool {
     }
   }
 
-  public handleRbfTransactions(rbfTransactions: { [txid: string]: MempoolTransactionExtended[]; }): void {
+  public handleRbfTransactions(rbfTransactions: { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }}): void {
-    for (const rbfTransaction in rbfTransactions) {
-      if (this.mempoolCache[rbfTransaction] && rbfTransactions[rbfTransaction]?.length) {
-        // Store replaced transactions
-        rbfCache.add(rbfTransactions[rbfTransaction], this.mempoolCache[rbfTransaction]);
-      }
-    }
-  }
-
-  public handleMinedRbfTransactions(rbfTransactions: { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }}): void {
     for (const rbfTransaction in rbfTransactions) {
       if (rbfTransactions[rbfTransaction].replacedBy && rbfTransactions[rbfTransaction]?.replaced?.length) {
         // Store replaced transactions

backend/src/api/mini-miner.ts

@@ -0,0 +1,515 @@
+import { Acceleration } from './acceleration/acceleration';
+import { MempoolTransactionExtended } from '../mempool.interfaces';
+import logger from '../logger';
+
+const BLOCK_WEIGHT_UNITS = 4_000_000;
+const BLOCK_SIGOPS = 80_000;
+const MAX_RELATIVE_GRAPH_SIZE = 100;
+
+export interface GraphTx {
+  txid: string;
+  vsize: number;
+  weight: number;
+  depends: string[];
+  spentby: string[];
+
+  ancestorcount: number;
+  ancestorsize: number;
+  fees: { // in sats
+    base: number;
+    ancestor: number;
+  };
+
+  ancestors: Map<string, GraphTx>,
+  ancestorRate: number;
+  individualRate: number;
+  score: number;
+}
+
+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;
+}
+
+/**
+ * Takes a raw transaction, and builds a graph of same-block relatives,
+ * and returns as a GraphTx
+ *
+ * @param tx
+ */
+export function 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 = convertToGraphTx(nextTx, spendMap);
+
+    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 GraphTx format
+ * fee and ancestor data is initialized with dummy/null values
+ *
+ * @param tx
+ */
+export function convertToGraphTx(tx: MempoolTransactionExtended, spendMap?: Map<string, MempoolTransactionExtended | string>): GraphTx {
+  return {
+    txid: tx.txid,
+    vsize: Math.max(tx.sigops * 5, Math.ceil(tx.weight / 4)),
+    weight: tx.weight,
+    fees: {
+      base: tx.fee || 0,
+      ancestor: tx.fee || 0,
+    },
+    depends: (tx.vin.map(vin => vin.txid).filter(depend => depend) as string[]),
+    spentby: spendMap ? (tx.vout.map((vout, index) => { const spend = spendMap.get(`${tx.txid}:${index}`); return (spend?.['txid'] || spend); }).filter(spent => spent) as string[]) : [],
+
+    ancestorcount: 1,
+    ancestorsize: Math.max(tx.sigops * 5, Math.ceil(tx.weight / 4)),
+    ancestors: new Map<string, GraphTx>(),
+    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
+ */
+export function expandRelativesGraph(mempool: { [txid: string]: MempoolTransactionExtended }, ancestors: Map<string, GraphTx>, spendMap: Map<string, MempoolTransactionExtended>): 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_RELATIVE_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 ancestorTx = ancestors.get(relativeTxid);
+      if (!ancestorTx && relativeTxid in mempool) {
+        const mempoolTx = mempool[relativeTxid];
+        ancestorTx = convertToGraphTx(mempoolTx, spendMap);
+      }
+      if (ancestorTx) {
+        stack.push(ancestorTx);
+      }
+    }
+  }
+
+  return relatives;
+}
+
+/**
+ * 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_RELATIVE_GRAPH_SIZE) {
+    logger.warn('cpfp dependency calculation failed: setAncestors reached depth of 100, unable to proceed');
+    return tx.ancestors;
+  }
+
+  // initialize the ancestor map for this tx
+  tx.ancestors = new Map<string, GraphTx>();
+  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 = 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
+   */
+export 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.ancestors?.forEach(ancestor => {
+      entry.ancestorcount++;
+      entry.ancestorsize += ancestor.vsize;
+      entry.fees.ancestor += ancestor.fees.base;
+    });
+    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
+ */
+export 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.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
+    setAncestorScores(tx);
+  });
+}
+
+/**
+ * Take a mempool transaction, and set the fee rates and ancestor score
+ *
+ * @param tx
+ */
+export function setAncestorScores(tx: GraphTx): 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
+export function mempoolComparator(a: GraphTx, b: GraphTx): number {
+  return b.score - a.score;
+}
+
+/*
+* 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: MempoolTransactionExtended[], 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/mining/mining-routes.ts

@@ -9,6 +9,8 @@ import bitcoinClient from '../bitcoin/bitcoin-client';
 import mining from "./mining";
 import PricesRepository from '../../repositories/PricesRepository';
 import AccelerationRepository from '../../repositories/AccelerationRepository';
+import accelerationApi from '../services/acceleration';
+import { handleError } from '../../utils/api';
 
 class MiningRoutes {
   public initRoutes(app: Application) {
@@ -41,6 +43,8 @@ class MiningRoutes {
       .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.$getAccelerationTotals)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'accelerations', this.$getActiveAccelerations)
+      .post(config.MEMPOOL.API_URL_PREFIX + 'acceleration/request/:txid', this.$requestAcceleration)
     ;
   }
 
@@ -50,12 +54,12 @@ class MiningRoutes {
       res.header('Cache-control', 'public');
       res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
       if (['testnet', 'signet', 'liquidtestnet'].includes(config.MEMPOOL.NETWORK)) {
-        res.status(400).send('Prices are not available on testnets.');
+        handleError(req, res, 400, 'Prices are not available on testnets.');
         return;
       }
       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);
@@ -68,7 +72,7 @@ class MiningRoutes {
       }
       res.status(200).send(response);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -81,9 +85,9 @@ class MiningRoutes {
       res.json(stats);
     } catch (e) {
       if (e instanceof Error && e.message.indexOf('This mining pool does not exist') > -1) {
-        res.status(404).send(e.message);
+        handleError(req, res, 404, e.message);
       } else {
-        res.status(500).send(e instanceof Error ? e.message : e);
+        handleError(req, res, 500, e instanceof Error ? e.message : e);
       }
     }
   }
@@ -100,9 +104,9 @@ class MiningRoutes {
       res.json(poolBlocks);
     } catch (e) {
       if (e instanceof Error && e.message.indexOf('This mining pool does not exist') > -1) {
-        res.status(404).send(e.message);
+        handleError(req, res, 404, e.message);
       } else {
-        res.status(500).send(e instanceof Error ? e.message : e);
+        handleError(req, res, 500, e instanceof Error ? e.message : e);
       }
     }
   }
@@ -126,7 +130,7 @@ class MiningRoutes {
         res.json(pools);
       }
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -140,7 +144,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(stats);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -154,7 +158,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
       res.json(hashrates);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -169,9 +173,9 @@ class MiningRoutes {
       res.json(hashrates);
     } catch (e) {
       if (e instanceof Error && e.message.indexOf('This mining pool does not exist') > -1) {
-        res.status(404).send(e.message);
+        handleError(req, res, 404, e.message);
       } else {
-        res.status(500).send(e instanceof Error ? e.message : e);
+        handleError(req, res, 500, e instanceof Error ? e.message : e);
       }
     }
   }
@@ -200,7 +204,7 @@ class MiningRoutes {
         currentDifficulty: currentDifficulty,
       });
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -214,7 +218,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(blockFees);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -227,14 +231,12 @@ class MiningRoutes {
         throw new Error('from must be less than to');
       }
       const blockFees = await mining.$getBlockFeesTimespan(parseInt(req.query.from as string, 10), parseInt(req.query.to as string, 10));
-      const blockCount = await BlocksRepository.$blockCount(null, null);
       res.header('Pragma', 'public');
       res.header('Cache-control', 'public');
-      res.header('X-total-count', blockCount.toString());
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(blockFees);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -248,7 +250,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(blockRewards);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -262,7 +264,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(blockFeeRates);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -280,7 +282,7 @@ class MiningRoutes {
         weights: blockWeights
       });
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -292,7 +294,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
       res.json(difficulty.map(adj => [adj.time, adj.height, adj.difficulty, adj.adjustment]));
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -316,7 +318,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(blocksHealth.map(health => [health.time, health.height, health.match_rate]));
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -325,7 +327,7 @@ class MiningRoutes {
       const audit = await BlocksAuditsRepository.$getBlockAudit(req.params.hash);
 
       if (!audit) {
-        res.status(204).send(`This block has not been audited.`);
+        handleError(req, res, 204, `This block has not been audited.`);
         return;
       }
 
@@ -334,7 +336,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24).toUTCString());
       res.json(audit);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -357,7 +359,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
       res.json(result);
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -370,7 +372,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
       res.json(await BlocksAuditsRepository.$getBlockAuditScores(height, height - 15));
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -383,7 +385,7 @@ class MiningRoutes {
       res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24).toUTCString());
       res.json(audit || 'null');
     } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -393,12 +395,12 @@ class MiningRoutes {
       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.');
+        handleError(req, res, 400, '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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -408,13 +410,13 @@ class MiningRoutes {
       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.');
+        handleError(req, res, 400, '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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -424,12 +426,12 @@ class MiningRoutes {
       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.');
+        handleError(req, res, 400, '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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 
@@ -439,12 +441,39 @@ class MiningRoutes {
       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.');
+        handleError(req, res, 400, '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);
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getActiveAccelerations(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)) {
+        handleError(req, res, 400, 'Acceleration data is not available.');
+        return;
+      }
+      res.status(200).send(accelerationApi.accelerations || []);
+    } catch (e) {
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $requestAcceleration(req: Request, res: Response): Promise<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);
+    try {
+      accelerationApi.accelerationRequested(req.params.txid);
+      res.status(200).send();
+    } catch (e) {
+      handleError(req, res, 500, e instanceof Error ? e.message : e);
     }
   }
 }

backend/src/api/pools-parser.ts

@@ -5,6 +5,9 @@ import PoolsRepository from '../repositories/PoolsRepository';
 import { PoolTag } from '../mempool.interfaces';
 import diskCache from './disk-cache';
 import mining from './mining/mining';
+import transactionUtils from './transaction-utils';
+import BlocksRepository from '../repositories/BlocksRepository';
+import redisCache from './redis-cache';
 
 class PoolsParser {
   miningPools: any[] = [];
@@ -37,15 +40,18 @@ class PoolsParser {
 
   /**
    * Populate our db with updated mining pool definition
-   * @param pools 
+   * @param pools
    */
   public async migratePoolsJson(): Promise<void> {
     // We also need to wipe the backend cache to make sure we don't serve blocks with
     // the wrong mining pool (usually happen with unknown blocks)
     diskCache.setIgnoreBlocksCache();
+    redisCache.setIgnoreBlocksCache();
 
     await this.$insertUnknownPool();
 
+    let reindexUnknown = false;
+
     for (const pool of this.miningPools) {
       if (!pool.id) {
         logger.info(`Mining pool ${pool.name} has no unique 'id' defined. Skipping.`);
@@ -57,22 +63,22 @@ class PoolsParser {
         logger.err(`Mining pool ${pool.name} must have at least one of the fields 'addresses' or 'regexes'. Skipping.`);
         continue;
       }
-      
+
       pool.addresses = pool.addresses || [];
       pool.regexes = pool.regexes || [];
-      
+
       if (pool.addresses.length === 0 && pool.regexes.length === 0) {
         logger.err(`Mining pool ${pool.name} has no 'addresses' nor 'regexes' defined. Skipping.`);
         continue;
       }
-      
+
       if (pool.addresses.length === 0) {
         logger.warn(`Mining pool ${pool.name} has no 'addresses' defined.`);
       }
-      
+
       if (pool.regexes.length === 0) {
         logger.warn(`Mining pool ${pool.name} has no 'regexes' defined.`);
-      }      
+      }
 
       const poolDB = await PoolsRepository.$getPoolByUniqueId(pool.id, false);
       if (!poolDB) {
@@ -80,7 +86,7 @@ class PoolsParser {
         const slug = pool.name.replace(/[^a-z0-9]/gi, '').toLowerCase();
         logger.debug(`Inserting new mining pool ${pool.name}`);
         await PoolsRepository.$insertNewMiningPool(pool, slug);
-        await this.$deleteUnknownBlocks();
+        reindexUnknown = true;
       } else {
         if (poolDB.name !== pool.name) {
           // Pool has been renamed
@@ -98,7 +104,45 @@ class PoolsParser {
           // Pool addresses changed or coinbase tags changed
           logger.notice(`Updating addresses and/or coinbase tags for ${pool.name} mining pool.`);
           await PoolsRepository.$updateMiningPoolTags(poolDB.id, pool.addresses, pool.regexes);
-          await this.$deleteBlocksForPool(poolDB);
+          reindexUnknown = true;
+          await this.$reindexBlocksForPool(poolDB.id);
+        }
+      }
+    }
+
+    if (reindexUnknown) {
+      logger.notice(`Updating addresses and/or coinbase tags for unknown mining pool.`);
+      let unknownPool;
+      if (config.DATABASE.ENABLED === true) {
+        unknownPool = await PoolsRepository.$getUnknownPool();
+      } else {
+        unknownPool = this.unknownPool;
+      }
+      await this.$reindexBlocksForPool(unknownPool.id);
+    }
+  }
+
+  public matchBlockMiner(scriptsig: string, addresses: string[], pools: PoolTag[]): PoolTag | undefined {
+    const asciiScriptSig = transactionUtils.hex2ascii(scriptsig);
+
+    for (let i = 0; i < pools.length; ++i) {
+      if (addresses.length) {
+        const poolAddresses: string[] = typeof pools[i].addresses === 'string' ?
+          JSON.parse(pools[i].addresses) : pools[i].addresses;
+        for (let y = 0; y < poolAddresses.length; y++) {
+          if (addresses.indexOf(poolAddresses[y]) !== -1) {
+            return pools[i];
+          }
+        }
+      }
+
+      const regexes: string[] = typeof pools[i].regexes === 'string' ?
+        JSON.parse(pools[i].regexes) : pools[i].regexes;
+      for (let y = 0; y < regexes.length; ++y) {
+        const regex = new RegExp(regexes[y], 'i');
+        const match = asciiScriptSig.match(regex);
+        if (match !== null) {
+          return pools[i];
         }
       }
     }
@@ -134,68 +178,47 @@ class PoolsParser {
   }
 
   /**
-   * Delete indexed blocks for an updated mining pool
+   * re-index pool assignment for blocks previously associated with pool
-   * 
+   *
-   * @param pool 
+   * @param pool local id of existing pool to reindex
    */
-  private async $deleteBlocksForPool(pool: PoolTag): Promise<void> {
+  private async $reindexBlocksForPool(poolId: number): Promise<void> {
-    // Get oldest blocks mined by the pool and assume pools-v2.json updates only concern most recent years
+    let firstKnownBlockPool = 130635; // https://mempool.space/block/0000000000000a067d94ff753eec72830f1205ad3a4c216a08a80c832e551a52
-    // Ignore early days of Bitcoin as there were no mining pool yet
+    if (config.MEMPOOL.NETWORK === 'testnet') {
-    const [oldestPoolBlock]: any[] = await DB.query(`
+      firstKnownBlockPool = 21106; // https://mempool.space/testnet/block/0000000070b701a5b6a1b965f6a38e0472e70b2bb31b973e4638dec400877581
-      SELECT height
+    } else if (config.MEMPOOL.NETWORK === 'signet') {
+      firstKnownBlockPool = 0;
+    }
+
+    const [blocks]: any[] = await DB.query(`
+      SELECT height, hash, coinbase_raw, coinbase_addresses
       FROM blocks
       WHERE pool_id = ?
-      ORDER BY height
+      AND height >= ?
-      LIMIT 1`,
+      ORDER BY height DESC
-      [pool.id]
+    `, [poolId, firstKnownBlockPool]);
-    );
 
-    let firstKnownBlockPool = 130635; // https://mempool.space/block/0000000000000a067d94ff753eec72830f1205ad3a4c216a08a80c832e551a52
+    let pools: PoolTag[] = [];
-    if (config.MEMPOOL.NETWORK === 'testnet') {
+    if (config.DATABASE.ENABLED === true) {
-      firstKnownBlockPool = 21106; // https://mempool.space/testnet/block/0000000070b701a5b6a1b965f6a38e0472e70b2bb31b973e4638dec400877581
+      pools = await PoolsRepository.$getPools();
-    } else if (config.MEMPOOL.NETWORK === 'signet') {
+    } else {
-      firstKnownBlockPool = 0;
+      pools = this.miningPools;
     }
 
-    const oldestBlockHeight = oldestPoolBlock.length ?? 0 > 0 ? oldestPoolBlock[0].height : firstKnownBlockPool;
+    let changed = 0;
-    const [unknownPool] = await DB.query(`SELECT id from pools where slug = "unknown"`);
+    for (const block of blocks) {
-    this.uniqueLog(logger.notice, `Deleting blocks with unknown mining pool from height ${oldestBlockHeight} for re-indexing`);
+      const addresses = JSON.parse(block.coinbase_addresses) || [];
-    await DB.query(`
+      const newPool = this.matchBlockMiner(block.coinbase_raw, addresses, pools);
-      DELETE FROM blocks
+      if (newPool && newPool.id !== poolId) {
-      WHERE pool_id = ? AND height >= ${oldestBlockHeight}`,
+        changed++;
-      [unknownPool[0].id]
+        await BlocksRepository.$savePool(block.hash, newPool.id);
-    );
+      }
-    logger.notice(`Deleting blocks from ${pool.name} mining pool for re-indexing`);
+    }
-    await DB.query(`
+
-      DELETE FROM blocks
+    logger.info(`${changed} blocks assigned to a new pool`, logger.tags.mining);
-      WHERE pool_id = ?`,
-      [pool.id]
-    );
 
     // Re-index hashrates and difficulty adjustments later
     mining.reindexHashrateRequested = true;
-    mining.reindexDifficultyAdjustmentRequested = true;
-  }
-
-  private async $deleteUnknownBlocks(): Promise<void> {
-    let firstKnownBlockPool = 130635; // https://mempool.space/block/0000000000000a067d94ff753eec72830f1205ad3a4c216a08a80c832e551a52
-    if (config.MEMPOOL.NETWORK === 'testnet') {
-      firstKnownBlockPool = 21106; // https://mempool.space/testnet/block/0000000070b701a5b6a1b965f6a38e0472e70b2bb31b973e4638dec400877581
-    } else if (config.MEMPOOL.NETWORK === 'signet') {
-      firstKnownBlockPool = 0;
-    }
-
-    const [unknownPool] = await DB.query(`SELECT id from pools where slug = "unknown"`);
-    this.uniqueLog(logger.notice, `Deleting blocks with unknown mining pool from height ${firstKnownBlockPool} for re-indexing`);
-    await DB.query(`
-      DELETE FROM blocks
-      WHERE pool_id = ? AND height >= ${firstKnownBlockPool}`,
-      [unknownPool[0].id]
-    );
-
-    // Re-index hashrates and difficulty adjustments later
-    mining.reindexHashrateRequested = true;
-    mining.reindexDifficultyAdjustmentRequested = true;
   }
 }
 

backend/src/api/rbf-cache.ts

@@ -44,6 +44,22 @@ interface CacheEvent {
   value?: any,
 }
 
+/**
+ * Singleton for tracking RBF trees
+ *
+ * Maintains a set of RBF trees, where each tree represents a sequence of
+ * consecutive RBF replacements.
+ *
+ * Trees are identified by the txid of the root transaction.
+ *
+ * To maintain consistency, the following invariants must be upheld:
+ *  - Symmetry: replacedBy(A) = B <=> A in replaces(B)
+ *  - Unique id: treeMap(treeMap(X)) = treeMap(X)
+ *  - Unique tree: A in replaces(B) => treeMap(A) == treeMap(B)
+ *  - Existence: X in treeMap => treeMap(X) in rbfTrees
+ *  - Completeness: X in replacedBy => X in treeMap, Y in replaces => Y in treeMap
+ */
+
 class RbfCache {
   private replacedBy: Map<string, string> = new Map();
   private replaces: Map<string, string[]> = new Map();
@@ -61,6 +77,10 @@ class RbfCache {
     setInterval(this.cleanup.bind(this), 1000 * 60 * 10);
   }
 
+  /**
+   * Low level cache operations
+   */
+
   private addTx(txid: string, tx: MempoolTransactionExtended): void {
     this.txs.set(txid, tx);
     this.cacheQueue.push({ op: CacheOp.Add, type: 'tx', txid });
@@ -92,6 +112,12 @@ class RbfCache {
     this.cacheQueue.push({ op: CacheOp.Remove, type: 'exp', txid });
   }
 
+  /**
+   * Basic data structure operations
+   * must uphold tree invariants
+   */
+
+
   public add(replaced: MempoolTransactionExtended[], newTxExtended: MempoolTransactionExtended): void {
     if (!newTxExtended || !replaced?.length || this.txs.has(newTxExtended.txid)) {
       return;
@@ -114,6 +140,10 @@ class RbfCache {
       if (!replacedTx.rbf) {
         txFullRbf = true;
       }
+      if (this.replacedBy.has(replacedTx.txid)) {
+        // should never happen
+        continue;
+      }
       this.replacedBy.set(replacedTx.txid, newTx.txid);
       if (this.treeMap.has(replacedTx.txid)) {
         const treeId = this.treeMap.get(replacedTx.txid);
@@ -140,18 +170,47 @@ class RbfCache {
       }
     }
     newTx.fullRbf = txFullRbf;
-    const treeId = replacedTrees[0].tx.txid;
     const newTree = {
       tx: newTx,
       time: newTime,
       fullRbf: treeFullRbf,
       replaces: replacedTrees
     };
-    this.addTree(treeId, newTree);
+    this.addTree(newTree.tx.txid, newTree);
-    this.updateTreeMap(treeId, newTree);
+    this.updateTreeMap(newTree.tx.txid, newTree);
     this.replaces.set(newTx.txid, replacedTrees.map(tree => tree.tx.txid));
   }
 
+  public mined(txid): void {
+    if (!this.txs.has(txid)) {
+      return;
+    }
+    const treeId = this.treeMap.get(txid);
+    if (treeId && this.rbfTrees.has(treeId)) {
+      const tree = this.rbfTrees.get(treeId);
+      if (tree) {
+        this.setTreeMined(tree, txid);
+        tree.mined = true;
+        this.dirtyTrees.add(treeId);
+        this.cacheQueue.push({ op: CacheOp.Change, type: 'tree', txid: treeId });
+      }
+    }
+    this.evict(txid);
+  }
+
+  // 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);
+    }
+  }
+
+  /**
+   * Read-only public interface
+   */
+
   public has(txId: string): boolean {
     return this.txs.has(txId);
   }
@@ -232,32 +291,6 @@ class RbfCache {
     return changes;
   }
 
-  public mined(txid): void {
-    if (!this.txs.has(txid)) {
-      return;
-    }
-    const treeId = this.treeMap.get(txid);
-    if (treeId && this.rbfTrees.has(treeId)) {
-      const tree = this.rbfTrees.get(treeId);
-      if (tree) {
-        this.setTreeMined(tree, txid);
-        tree.mined = true;
-        this.dirtyTrees.add(treeId);
-        this.cacheQueue.push({ op: CacheOp.Change, type: 'tree', txid: treeId });
-      }
-    }
-    this.evict(txid);
-  }
-
-  // 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);
-    }
-  }
-
   // is the transaction involved in a full rbf replacement?
   public isFullRbf(txid: string): boolean {
     const treeId = this.treeMap.get(txid);
@@ -271,6 +304,10 @@ class RbfCache {
     return tree?.fullRbf;
   }
 
+  /**
+   * Cache maintenance & utility functions
+   */
+
   private cleanup(): void {
     const now = Date.now();
     for (const txid of this.expiring.keys()) {
@@ -299,10 +336,6 @@ class RbfCache {
       for (const tx of (replaces || [])) {
         // recursively remove prior versions from the cache
         this.replacedBy.delete(tx);
-        // if this is the id of a tree, remove that too
-        if (this.treeMap.get(tx) === tx) {
-          this.removeTree(tx);
-        }
         this.remove(tx);
       }
     }
@@ -370,14 +403,21 @@ class RbfCache {
     };
   }
 
-  public async load({ txs, trees, expiring, mempool }): Promise<void> {
+  public async load({ txs, trees, expiring, mempool, spendMap }): Promise<void> {
     try {
       txs.forEach(txEntry => {
         this.txs.set(txEntry.value.txid, txEntry.value);
       });
       this.staleCount = 0;
-      for (const deflatedTree of trees) {
+      for (const deflatedTree of trees.sort((a, b) => Object.keys(b).length - Object.keys(a).length)) {
-        await this.importTree(mempool, deflatedTree.root, deflatedTree.root, deflatedTree, this.txs);
+        const tree = await this.importTree(mempool, deflatedTree.root, deflatedTree.root, deflatedTree, this.txs);
+        if (tree) {
+          this.addTree(tree.tx.txid, tree);
+          this.updateTreeMap(tree.tx.txid, tree);
+          if (tree.mined) {
+            this.evict(tree.tx.txid);
+          }
+        }
       }
       expiring.forEach(expiringEntry => {
         if (this.txs.has(expiringEntry.key)) {
@@ -385,6 +425,31 @@ class RbfCache {
         }
       });
       this.staleCount = 0;
+
+      // connect cached trees to current mempool transactions
+      const conflicts: Record<string, { replacedBy: MempoolTransactionExtended, replaces: Set<MempoolTransactionExtended> }> = {};
+      for (const tree of this.rbfTrees.values()) {
+        const tx = this.getTx(tree.tx.txid);
+        if (!tx || tree.mined) {
+          continue;
+        }
+        for (const vin of tx.vin) {
+          const conflict = spendMap.get(`${vin.txid}:${vin.vout}`);
+          if (conflict && conflict.txid !== tx.txid) {
+            if (!conflicts[conflict.txid]) {
+              conflicts[conflict.txid] = {
+                replacedBy: conflict,
+                replaces: new Set(),
+              };
+            }
+            conflicts[conflict.txid].replaces.add(tx);
+          }
+        }
+      }
+      for (const { replacedBy, replaces } of Object.values(conflicts)) {
+        this.add([...replaces.values()], replacedBy);
+      }
+
       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();
@@ -426,6 +491,12 @@ class RbfCache {
       return;
     }
 
+    // if this tx is already in the cache, return early
+    if (this.treeMap.has(txid)) {
+      this.removeTree(deflated.key);
+      return;
+    }
+
     // recursively reconstruct child trees
     for (const childId of treeInfo.replaces) {
       const replaced = await this.importTree(mempool, root, childId, deflated, txs, mined);
@@ -457,10 +528,6 @@ class RbfCache {
       fullRbf: treeInfo.fullRbf,
       replaces,
     };
-    this.treeMap.set(txid, root);
-    if (root === txid) {
-      this.addTree(root, tree);
-    }
     return tree;
   }
 
@@ -511,6 +578,7 @@ class RbfCache {
       processTxs(txs);
     }
 
+    // evict missing transactions
     for (const txid of txids) {
       if (!found[txid]) {
         this.evict(txid, false);

backend/src/api/redis-cache.ts

@@ -27,6 +27,7 @@ class RedisCache {
   private rbfCacheQueue: { type: string, txid: string, value: any }[] = [];
   private rbfRemoveQueue: { type: string, txid: string }[] = [];
   private txFlushLimit: number = 10000;
+  private ignoreBlocksCache = false;
 
   constructor() {
     if (config.REDIS.ENABLED) {
@@ -155,7 +156,7 @@ class RedisCache {
     const toAdd = this.cacheQueue.slice(0, this.txFlushLimit);
     try {
       const msetData = toAdd.map(tx => {
-        const minified: any = { ...tx };
+        const minified: any = structuredClone(tx);
         delete minified.hex;
         for (const vin of minified.vin) {
           delete vin.inner_redeemscript_asm;
@@ -341,9 +342,7 @@ class RedisCache {
       return;
     }
     logger.info('Restoring mempool and blocks data from Redis cache');
-    // Load block data
+
-    const loadedBlocks = await this.$getBlocks();
-    const loadedBlockSummaries = await this.$getBlockSummaries();
     // Load mempool
     const loadedMempool = await this.$getMempool();
     this.inflateLoadedTxs(loadedMempool);
@@ -352,15 +351,21 @@ class RedisCache {
     const rbfTrees = await this.$getRbfEntries('tree');
     const rbfExpirations = await this.$getRbfEntries('exp');
 
-    // Set loaded data
+    // Load & set block data
-    blocks.setBlocks(loadedBlocks || []);
+    if (!this.ignoreBlocksCache) {
-    blocks.setBlockSummaries(loadedBlockSummaries || []);
+      const loadedBlocks = await this.$getBlocks();
+      const loadedBlockSummaries = await this.$getBlockSummaries();
+      blocks.setBlocks(loadedBlocks || []);
+      blocks.setBlockSummaries(loadedBlockSummaries || []);
+    }
+    // Set other data
     await memPool.$setMempool(loadedMempool);
     await rbfCache.load({
       txs: rbfTxs,
       trees: rbfTrees.map(loadedTree => { loadedTree.value.key = loadedTree.key; return loadedTree.value; }),
       expiring: rbfExpirations,
       mempool: memPool.getMempool(),
+      spendMap: memPool.getSpendMap(),
     });
   }
 
@@ -411,6 +416,10 @@ class RedisCache {
     }
     return result;
   }
+
+  public setIgnoreBlocksCache(): void {
+    this.ignoreBlocksCache = true;
+  }
 }
 
 export default new RedisCache();

backend/src/api/services/acceleration.ts

@@ -1,8 +1,10 @@
 import config from '../../config';
 import logger from '../../logger';
-import { BlockExtended, PoolTag } from '../../mempool.interfaces';
+import { BlockExtended } from '../../mempool.interfaces';
 import axios from 'axios';
 
+type MyAccelerationStatus = 'requested' | 'accelerating' | 'done';
+
 export interface Acceleration {
   txid: string,
   added: number,
@@ -10,6 +12,12 @@ export interface Acceleration {
   effectiveFee: number,
   feeDelta: number,
   pools: number[],
+  positions?: {
+    [pool: number]: {
+      block: number,
+      vbytes: number,
+    },
+  },
 };
 
 export interface AccelerationHistory {
@@ -25,25 +33,95 @@ export interface AccelerationHistory {
   feeDelta: number,
   blockHash: string,
   blockHeight: number,
-  pools: {
+  pools: number[];
-    pool_unique_id: number,
-    username: string,
-  }[],
 };
 
 class AccelerationApi {
-  public async $fetchAccelerations(): Promise<Acceleration[] | null> {
+  private onDemandPollingEnabled = !config.MEMPOOL_SERVICES.ACCELERATIONS;
-    if (config.MEMPOOL_SERVICES.ACCELERATIONS) {
+  private apiPath = config.MEMPOOL.OFFICIAL ? (config.MEMPOOL_SERVICES.API + '/accelerator/accelerations') : (config.EXTERNAL_DATA_SERVER.MEMPOOL_API + '/accelerations');
-      try {
+  private _accelerations: Acceleration[] | null = null;
-        const response = await axios.get(`${config.MEMPOOL_SERVICES.API}/accelerator/accelerations`, { responseType: 'json', timeout: 10000 });
+  private lastPoll = 0;
-        return response.data as Acceleration[];
+  private forcePoll = false;
-      } catch (e) {
+  private myAccelerations: Record<string, { status: MyAccelerationStatus, added: number, acceleration?: Acceleration }> = {};
-        logger.warn('Failed to fetch current accelerations from the mempool services backend: ' + (e instanceof Error ? e.message : e));
+
-        return null;
+  public get accelerations(): Acceleration[] | null {
+    return this._accelerations;
+  }
+
+  public countMyAccelerationsWithStatus(filter: MyAccelerationStatus): number {
+    return Object.values(this.myAccelerations).reduce((count, {status}) => { return count + (status === filter ? 1 : 0); }, 0);
+  }
+
+  public accelerationRequested(txid: string): void {
+    if (this.onDemandPollingEnabled) {
+      this.myAccelerations[txid] = { status: 'requested', added: Date.now() };
+    }
+  }
+
+  public accelerationConfirmed(): void {
+    this.forcePoll = true;
+  }
+
+  private async $fetchAccelerations(): Promise<Acceleration[] | null> {
+    try {
+      const response = await axios.get(this.apiPath, { responseType: 'json', timeout: 10000 });
+      return response?.data || [];
+    } catch (e) {
+      logger.warn('Failed to fetch current accelerations from the mempool services backend: ' + (e instanceof Error ? e.message : e));
+      return null;
+    }
+  }
+
+  public async $updateAccelerations(): Promise<Acceleration[] | null> {
+    if (!this.onDemandPollingEnabled) {
+      const accelerations = await this.$fetchAccelerations();
+      if (accelerations) {
+        this._accelerations = accelerations;
+        return this._accelerations;
       }
     } else {
-      return [];
+      return this.$updateAccelerationsOnDemand();
     }
+    return null;
+  }
+
+  private async $updateAccelerationsOnDemand(): Promise<Acceleration[] | null> {
+    const shouldUpdate = this.forcePoll
+      || this.countMyAccelerationsWithStatus('requested') > 0
+      || (this.countMyAccelerationsWithStatus('accelerating') > 0 && this.lastPoll < (Date.now() - (10 * 60 * 1000)));
+
+    // update accelerations if necessary
+    if (shouldUpdate) {
+      const accelerations = await this.$fetchAccelerations();
+      this.lastPoll = Date.now();
+      this.forcePoll = false;
+      if (accelerations) {
+        const latestAccelerations: Record<string, Acceleration> = {};
+        // set relevant accelerations to 'accelerating'
+        for (const acc of accelerations) {
+          if (this.myAccelerations[acc.txid]) {
+            latestAccelerations[acc.txid] = acc;
+            this.myAccelerations[acc.txid] = { status: 'accelerating', added: Date.now(), acceleration: acc };
+          }
+        }
+        // txs that are no longer accelerating are either confirmed or canceled, so mark for expiry
+        for (const [txid, { status, acceleration }] of Object.entries(this.myAccelerations)) {
+          if (status === 'accelerating' && !latestAccelerations[txid]) {
+            this.myAccelerations[txid] = { status: 'done', added: Date.now(), acceleration };
+          }
+        }
+      }
+    }
+
+    // clear expired accelerations (confirmed / failed / not accepted) after 10 minutes
+    for (const [txid, { status, added }] of Object.entries(this.myAccelerations)) {
+      if (['requested', 'done'].includes(status) && added < (Date.now() - (1000 * 60 * 10))) {
+        delete this.myAccelerations[txid];
+      }
+    }
+
+    this._accelerations = Object.values(this.myAccelerations).map(({ acceleration }) => acceleration).filter(acc => acc) as Acceleration[];
+    return this._accelerations;
   }
 
   public async $fetchAccelerationHistory(page?: number, status?: string): Promise<AccelerationHistory[] | null> {

backend/src/api/transaction-utils.ts

@@ -103,7 +103,7 @@ class TransactionUtils {
     }
     const feePerVbytes = (transaction.fee || 0) / (transaction.weight / 4);
     const transactionExtended: TransactionExtended = Object.assign({
-      vsize: Math.round(transaction.weight / 4),
+      vsize: transaction.weight / 4,
       feePerVsize: feePerVbytes,
       effectiveFeePerVsize: feePerVbytes,
     }, transaction);
@@ -123,7 +123,7 @@ class TransactionUtils {
     const adjustedFeePerVsize = (transaction.fee || 0) / adjustedVsize;
     const transactionExtended: MempoolTransactionExtended = Object.assign(transaction, {
       order: this.txidToOrdering(transaction.txid),
-      vsize: Math.round(transaction.weight / 4),
+      vsize,
       adjustedVsize,
       sigops,
       feePerVsize: feePerVbytes,
@@ -338,6 +338,87 @@ class TransactionUtils {
     const positionOfScript = hasAnnex ? witness.length - 3 : witness.length - 2;
     return witness[positionOfScript];
   }
+
+  // calculate the most parsimonious set of prioritizations given a list of block transactions
+  // (i.e. the most likely prioritizations and deprioritizations)
+  public identifyPrioritizedTransactions(transactions: any[], rateKey: string): { prioritized: string[], deprioritized: string[] } {
+    // find the longest increasing subsequence of transactions
+    // (adapted from https://en.wikipedia.org/wiki/Longest_increasing_subsequence#Efficient_algorithms)
+    // should be O(n log n)
+    const X = transactions.slice(1).reverse().map((tx) => ({ txid: tx.txid, rate: tx[rateKey] })); // standard block order is by *decreasing* effective fee rate, but we want to iterate in increasing order (and skip the coinbase)
+    if (X.length < 2) {
+      return { prioritized: [], deprioritized: [] };
+    }
+    const N = X.length;
+    const P: number[] = new Array(N);
+    const M: number[] = new Array(N + 1);
+    M[0] = -1; // undefined so can be set to any value
+
+    let L = 0;
+    for (let i = 0; i < N; i++) {
+      // Binary search for the smallest positive l ≤ L
+      // such that X[M[l]].effectiveFeePerVsize > X[i].effectiveFeePerVsize
+      let lo = 1;
+      let hi = L + 1;
+      while (lo < hi) {
+        const mid = lo + Math.floor((hi - lo) / 2); // lo <= mid < hi
+        if (X[M[mid]].rate > X[i].rate) {
+          hi = mid;
+        } else { // if X[M[mid]].effectiveFeePerVsize < X[i].effectiveFeePerVsize
+          lo = mid + 1;
+        }
+      }
+
+      // After searching, lo == hi is 1 greater than the
+      // length of the longest prefix of X[i]
+      const newL = lo;
+
+      // The predecessor of X[i] is the last index of
+      // the subsequence of length newL-1
+      P[i] = M[newL - 1];
+      M[newL] = i;
+
+      if (newL > L) {
+        // If we found a subsequence longer than any we've
+        // found yet, update L
+        L = newL;
+      }
+    }
+
+    // Reconstruct the longest increasing subsequence
+    // It consists of the values of X at the L indices:
+    // ..., P[P[M[L]]], P[M[L]], M[L]
+    const LIS: any[] = new Array(L);
+    let k = M[L];
+    for (let j = L - 1; j >= 0; j--) {
+      LIS[j] = X[k];
+      k = P[k];
+    }
+
+    const lisMap = new Map<string, number>();
+    LIS.forEach((tx, index) => lisMap.set(tx.txid, index));
+
+    const prioritized: string[] = [];
+    const deprioritized: string[] = [];
+
+    let lastRate = X[0].rate;
+
+    for (const tx of X) {
+      if (lisMap.has(tx.txid)) {
+        lastRate = tx.rate;
+      } else {
+        if (Math.abs(tx.rate - lastRate) < 0.1) {
+          // skip if the rate is almost the same as the previous transaction
+        } else if (tx.rate <= lastRate) {
+          prioritized.push(tx.txid);
+        } else {
+          deprioritized.push(tx.txid);
+        }
+      }
+    }
+
+    return { prioritized, deprioritized };
+  }
 }
 
 export default new TransactionUtils();

backend/src/api/websocket-handler.ts

@@ -3,7 +3,7 @@ import * as WebSocket from 'ws';
 import {
   BlockExtended, TransactionExtended, MempoolTransactionExtended, WebsocketResponse,
   OptimizedStatistic, ILoadingIndicators, GbtCandidates, TxTrackingInfo,
-  MempoolBlockDelta, MempoolDelta, MempoolDeltaTxids
+  MempoolDelta, MempoolDeltaTxids
 } from '../mempool.interfaces';
 import blocks from './blocks';
 import memPool from './mempool';
@@ -33,7 +33,7 @@ interface AddressTransactions {
   removed: MempoolTransactionExtended[],
 }
 import bitcoinSecondClient from './bitcoin/bitcoin-second-client';
-import { calculateCpfp } from './cpfp';
+import { calculateMempoolTxCpfp } from './cpfp';
 
 // valid 'want' subscriptions
 const wantable = [
@@ -206,7 +206,8 @@ class WebsocketHandler {
                 }
                 response['txPosition'] = JSON.stringify({
                   txid: trackTxid,
-                  position
+                  position,
+                  accelerationPositions: memPool.getAccelerationPositions(tx.txid),
                 });
               }
             } else {
@@ -519,8 +520,17 @@ class WebsocketHandler {
     }
   }
 
+  /**
+   *
+   * @param newMempool
+   * @param mempoolSize
+   * @param newTransactions  array of transactions added this mempool update.
+   * @param recentlyDeletedTransactions array of arrays of transactions removed in the last N mempool updates, most recent first.
+   * @param accelerationDelta
+   * @param candidates
+   */
   async $handleMempoolChange(newMempool: { [txid: string]: MempoolTransactionExtended }, mempoolSize: number,
-    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[], accelerationDelta: string[],
+    newTransactions: MempoolTransactionExtended[], recentlyDeletedTransactions: MempoolTransactionExtended[][], accelerationDelta: string[],
     candidates?: GbtCandidates): Promise<void> {
     if (!this.webSocketServers.length) {
       throw new Error('No WebSocket.Server have been set');
@@ -528,6 +538,8 @@ class WebsocketHandler {
 
     this.printLogs();
 
+    const deletedTransactions = recentlyDeletedTransactions.length ? recentlyDeletedTransactions[0] : [];
+
     const transactionIds = (memPool.limitGBT && candidates) ? Object.keys(candidates?.txs || {}) : Object.keys(newMempool);
     let added = newTransactions;
     let removed = deletedTransactions;
@@ -537,16 +549,16 @@ class WebsocketHandler {
     }
 
     if (config.MEMPOOL.RUST_GBT) {
-      await mempoolBlocks.$rustUpdateBlockTemplates(transactionIds, newMempool, added, removed, candidates, config.MEMPOOL_SERVICES.ACCELERATIONS);
+      await mempoolBlocks.$rustUpdateBlockTemplates(transactionIds, newMempool, added, removed, candidates, true);
     } else {
-      await mempoolBlocks.$updateBlockTemplates(transactionIds, newMempool, added, removed, candidates, accelerationDelta, true, config.MEMPOOL_SERVICES.ACCELERATIONS);
+      await mempoolBlocks.$updateBlockTemplates(transactionIds, newMempool, added, removed, candidates, accelerationDelta, true, true);
     }
 
     const mBlocks = mempoolBlocks.getMempoolBlocks();
     const mBlockDeltas = mempoolBlocks.getMempoolBlockDeltas();
     const mempoolInfo = memPool.getMempoolInfo();
     const vBytesPerSecond = memPool.getVBytesPerSecond();
-    const rbfTransactions = Common.findRbfTransactions(newTransactions, deletedTransactions);
+    const rbfTransactions = Common.findRbfTransactions(newTransactions, recentlyDeletedTransactions.flat());
     const da = difficultyAdjustment.getDifficultyAdjustment();
     const accelerations = memPool.getAccelerations();
     memPool.handleRbfTransactions(rbfTransactions);
@@ -577,7 +589,7 @@ class WebsocketHandler {
     const replacedTransactions: { replaced: string, by: TransactionExtended }[] = [];
     for (const tx of newTransactions) {
       if (rbfTransactions[tx.txid]) {
-        for (const replaced of rbfTransactions[tx.txid]) {
+        for (const replaced of rbfTransactions[tx.txid].replaced) {
           replacedTransactions.push({ replaced: replaced.txid, by: tx });
         }
       }
@@ -820,10 +832,14 @@ class WebsocketHandler {
             position: {
               ...mempoolTx.position,
               accelerated: mempoolTx.acceleration || undefined,
-            }
+              acceleratedBy: mempoolTx.acceleratedBy || undefined,
+              acceleratedAt: mempoolTx.acceleratedAt || undefined,
+              feeDelta: mempoolTx.feeDelta || undefined,
+            },
+            accelerationPositions: memPool.getAccelerationPositions(mempoolTx.txid),
           };
           if (!mempoolTx.cpfpChecked && !mempoolTx.acceleration) {
-            calculateCpfp(mempoolTx, newMempool);
+            calculateMempoolTxCpfp(mempoolTx, newMempool);
           }
           if (mempoolTx.cpfpDirty) {
             positionData['cpfp'] = {
@@ -833,7 +849,7 @@ class WebsocketHandler {
               effectiveFeePerVsize: mempoolTx.effectiveFeePerVsize || null,
               sigops: mempoolTx.sigops,
               adjustedVsize: mempoolTx.adjustedVsize,
-              acceleration: mempoolTx.acceleration
+              acceleration: mempoolTx.acceleration,
             };
           }
           response['txPosition'] = JSON.stringify(positionData);
@@ -858,9 +874,12 @@ class WebsocketHandler {
             txInfo.position = {
               ...mempoolTx.position,
               accelerated: mempoolTx.acceleration || undefined,
+              acceleratedBy: mempoolTx.acceleratedBy || undefined,
+              acceleratedAt: mempoolTx.acceleratedAt || undefined,
+              feeDelta: mempoolTx.feeDelta || undefined,
             };
             if (!mempoolTx.cpfpChecked) {
-              calculateCpfp(mempoolTx, newMempool);
+              calculateMempoolTxCpfp(mempoolTx, newMempool);
             }
             if (mempoolTx.cpfpDirty) {
               txInfo.cpfp = {
@@ -925,6 +944,8 @@ class WebsocketHandler {
       throw new Error('No WebSocket.Server have been set');
     }
 
+    const blockTransactions = structuredClone(transactions);
+
     this.printLogs();
     await statistics.runStatistics();
 
@@ -934,31 +955,27 @@ class WebsocketHandler {
     let transactionIds: string[] = (memPool.limitGBT) ? Object.keys(candidates?.txs || {}) : Object.keys(_memPool);
 
     const accelerations = Object.values(mempool.getAccelerations());
-    await accelerationRepository.$indexAccelerationsForBlock(block, accelerations, transactions);
+    await accelerationRepository.$indexAccelerationsForBlock(block, accelerations, structuredClone(transactions));
 
     const rbfTransactions = Common.findMinedRbfTransactions(transactions, memPool.getSpendMap());
-    memPool.handleMinedRbfTransactions(rbfTransactions);
+    memPool.handleRbfTransactions(rbfTransactions);
     memPool.removeFromSpendMap(transactions);
 
     if (config.MEMPOOL.AUDIT && memPool.isInSync()) {
       let projectedBlocks;
       const auditMempool = _memPool;
-      const isAccelerated = config.MEMPOOL_SERVICES.ACCELERATIONS && accelerationApi.isAcceleratedBlock(block, Object.values(mempool.getAccelerations()));
+      const isAccelerated = accelerationApi.isAcceleratedBlock(block, Object.values(mempool.getAccelerations()));
 
-      if ((config.MEMPOOL_SERVICES.ACCELERATIONS)) {
+      if (config.MEMPOOL.RUST_GBT) {
-        if (config.MEMPOOL.RUST_GBT) {
+        const added = memPool.limitGBT ? (candidates?.added || []) : [];
-          const added = memPool.limitGBT ? (candidates?.added || []) : [];
+        const removed = memPool.limitGBT ? (candidates?.removed || []) : [];
-          const removed = memPool.limitGBT ? (candidates?.removed || []) : [];
+        projectedBlocks = await mempoolBlocks.$rustUpdateBlockTemplates(transactionIds, auditMempool, added, removed, candidates, isAccelerated, block.extras.pool.id);
-          projectedBlocks = await mempoolBlocks.$rustUpdateBlockTemplates(transactionIds, auditMempool, added, removed, candidates, isAccelerated, block.extras.pool.id);
-        } else {
-          projectedBlocks = await mempoolBlocks.$makeBlockTemplates(transactionIds, auditMempool, candidates, false, isAccelerated, block.extras.pool.id);
-        }
       } else {
-        projectedBlocks = mempoolBlocks.getMempoolBlocksWithTransactions();
+        projectedBlocks = await mempoolBlocks.$makeBlockTemplates(transactionIds, auditMempool, candidates, false, isAccelerated, block.extras.pool.id);
       }
 
       if (Common.indexingEnabled()) {
-        const { censored, added, prioritized, fresh, sigop, fullrbf, accelerated, score, similarity } = Audit.auditBlock(transactions, projectedBlocks, auditMempool);
+        const { unseen, censored, added, prioritized, fresh, sigop, fullrbf, accelerated, score, similarity } = Audit.auditBlock(block.height, blockTransactions, projectedBlocks, auditMempool);
         const matchRate = Math.round(score * 100 * 100) / 100;
 
         const stripped = projectedBlocks[0]?.transactions ? projectedBlocks[0].transactions : [];
@@ -980,9 +997,11 @@ class WebsocketHandler {
         });
 
         BlocksAuditsRepository.$saveAudit({
+          version: 1,
           time: block.timestamp,
           height: block.height,
           hash: block.id,
+          unseenTxs: unseen,
           addedTxs: added,
           prioritizedTxs: prioritized,
           missingTxs: censored,
@@ -1034,7 +1053,7 @@ class WebsocketHandler {
       const removed = memPool.limitGBT ? (candidates?.removed || []) : transactions;
       await mempoolBlocks.$rustUpdateBlockTemplates(transactionIds, _memPool, added, removed, candidates, true);
     } else {
-      await mempoolBlocks.$makeBlockTemplates(transactionIds, _memPool, candidates, true, config.MEMPOOL_SERVICES.ACCELERATIONS);
+      await mempoolBlocks.$makeBlockTemplates(transactionIds, _memPool, candidates, true, true);
     }
     const mBlocks = mempoolBlocks.getMempoolBlocks();
     const mBlockDeltas = mempoolBlocks.getMempoolBlockDeltas();
@@ -1134,7 +1153,11 @@ class WebsocketHandler {
               position: {
                 ...mempoolTx.position,
                 accelerated: mempoolTx.acceleration || undefined,
-              }
+                acceleratedBy: mempoolTx.acceleratedBy || undefined,
+                acceleratedAt: mempoolTx.acceleratedAt || undefined,
+                feeDelta: mempoolTx.feeDelta || undefined,
+              },
+              accelerationPositions: memPool.getAccelerationPositions(mempoolTx.txid),
             });
           }
         }
@@ -1153,6 +1176,9 @@ class WebsocketHandler {
                   ...mempoolTx.position,
                 },
                 accelerated: mempoolTx.acceleration || undefined,
+                acceleratedBy: mempoolTx.acceleratedBy || undefined,
+                acceleratedAt: mempoolTx.acceleratedAt || undefined,
+                feeDelta: mempoolTx.feeDelta || undefined,
               };
             }
           }
@@ -1293,7 +1319,7 @@ class WebsocketHandler {
   // and zips it together into a valid JSON object
   private serializeResponse(response): string {
     return '{'
-        + Object.keys(response).map(key => `"${key}": ${response[key]}`).join(', ')
+        + Object.keys(response).filter(key => response[key] != null).map(key => `"${key}": ${response[key]}`).join(', ')
         + '}';
   }
 

backend/src/config.ts

@@ -29,7 +29,7 @@ interface IConfig {
     EXTERNAL_RETRY_INTERVAL: number;
     USER_AGENT: string;
     STDOUT_LOG_MIN_PRIORITY: 'emerg' | 'alert' | 'crit' | 'err' | 'warn' | 'notice' | 'info' | 'debug';
-    AUTOMATIC_BLOCK_REINDEXING: boolean;
+    AUTOMATIC_POOLS_UPDATE: boolean;
     POOLS_JSON_URL: string,
     POOLS_JSON_TREE_URL: string,
     AUDIT: boolean;
@@ -51,6 +51,7 @@ interface IConfig {
     REQUEST_TIMEOUT: number;
     FALLBACK_TIMEOUT: number;
     FALLBACK: string[];
+    MAX_BEHIND_TIP: number;
   };
   LIGHTNING: {
     ENABLED: boolean;
@@ -188,7 +189,7 @@ const defaults: IConfig = {
     'EXTERNAL_RETRY_INTERVAL': 0,
     'USER_AGENT': 'mempool',
     'STDOUT_LOG_MIN_PRIORITY': 'debug',
-    'AUTOMATIC_BLOCK_REINDEXING': false,
+    'AUTOMATIC_POOLS_UPDATE': 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',
     'AUDIT': false,
@@ -210,6 +211,7 @@ const defaults: IConfig = {
     'REQUEST_TIMEOUT': 10000,
     'FALLBACK_TIMEOUT': 5000,
     'FALLBACK': [],
+    'MAX_BEHIND_TIP': 2,
   },
   'ELECTRUM': {
     'HOST': '127.0.0.1',

backend/src/database.ts

@@ -2,8 +2,7 @@ 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, { LogLevel } from './logger';
-import logger from './logger';
 import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } from 'mysql2/typings/mysql';
 import { execSync } from 'child_process';
 

backend/src/index.ts

@@ -45,6 +45,7 @@ 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';
+import mempoolBlocks from './api/mempool-blocks';
 
 class Server {
   private wss: WebSocket.Server | undefined;
@@ -149,6 +150,7 @@ class Server {
 
     await poolsUpdater.updatePoolsJson(); // Needs to be done before loading the disk cache because we sometimes wipe it
     await syncAssets.syncAssets$();
+    await mempoolBlocks.updatePools$();
     if (config.MEMPOOL.ENABLED) {
       if (config.MEMPOOL.CACHE_ENABLED) {
         await diskCache.$loadMempoolCache();
@@ -227,7 +229,7 @@ class Server {
       const newMempool = await bitcoinApi.$getRawMempool();
       const minFeeMempool = memPool.limitGBT ? await bitcoinSecondClient.getRawMemPool() : null;
       const minFeeTip = memPool.limitGBT ? await bitcoinSecondClient.getBlockCount() : -1;
-      const newAccelerations = await accelerationApi.$fetchAccelerations();
+      const newAccelerations = await accelerationApi.$updateAccelerations();
       const numHandledBlocks = await blocks.$updateBlocks();
       const pollRate = config.MEMPOOL.POLL_RATE_MS * (indexer.indexerIsRunning() ? 10 : 1);
       if (numHandledBlocks === 0) {
@@ -331,7 +333,9 @@ class Server {
     if (config.MEMPOOL_SERVICES.ACCELERATIONS) {
       accelerationRoutes.initRoutes(this.app);
     }
-    aboutRoutes.initRoutes(this.app);
+    if (!config.MEMPOOL.OFFICIAL) {
+      aboutRoutes.initRoutes(this.app);
+    }
   }
 
   healthCheck(): void {

backend/src/indexer.ts

@@ -10,6 +10,7 @@ import config from './config';
 import auditReplicator from './replication/AuditReplication';
 import statisticsReplicator from './replication/StatisticsReplication';
 import AccelerationRepository from './repositories/AccelerationRepository';
+import BlocksAuditsRepository from './repositories/BlocksAuditsRepository';
 
 export interface CoreIndex {
   name: string;
@@ -182,6 +183,7 @@ class Indexer {
       }
 
       this.runSingleTask('blocksPrices');
+      await blocks.$indexCoinbaseAddresses();
       await mining.$indexDifficultyAdjustments();
       await mining.$generateNetworkHashrateHistory();
       await mining.$generatePoolHashrateHistory();
@@ -191,6 +193,7 @@ class Indexer {
       await auditReplicator.$sync();
       await statisticsReplicator.$sync();
       await AccelerationRepository.$indexPastAccelerations();
+      await BlocksAuditsRepository.$migrateAuditsV0toV1();
       // do not wait for classify blocks to finish
       blocks.$classifyBlocks();
     } catch (e) {

backend/src/mempool.interfaces.ts

@@ -29,9 +29,11 @@ export interface PoolStats extends PoolInfo {
 }
 
 export interface BlockAudit {
+  version: number,
   time: number,
   height: number,
   hash: string,
+  unseenTxs: string[],
   missingTxs: string[],
   freshTxs: string[],
   sigopTxs: string[],
@@ -42,6 +44,19 @@ export interface BlockAudit {
   matchRate: number,
   expectedFees?: number,
   expectedWeight?: number,
+  template?: any[];
+}
+
+export interface TransactionAudit {
+  seen?: boolean;
+  expected?: boolean;
+  added?: boolean;
+  prioritized?: boolean;
+  delayed?: number;
+  accelerated?: boolean;
+  conflict?: boolean;
+  coinbase?: boolean;
+  firstSeen?: number;
 }
 
 export interface AuditScore {
@@ -111,6 +126,9 @@ export interface TransactionExtended extends IEsploraApi.Transaction {
     vsize: number,
   };
   acceleration?: boolean;
+  acceleratedBy?: number[];
+  acceleratedAt?: number;
+  feeDelta?: number;
   replacement?: boolean;
   uid?: number;
   flags?: number;
@@ -208,6 +226,7 @@ export interface CpfpInfo {
   sigops?: number;
   adjustedVsize?: number,
   acceleration?: boolean,
+  fee?: number;
 }
 
 export interface TransactionStripped {
@@ -286,6 +305,7 @@ export interface BlockExtension {
   coinbaseRaw: string;
   orphans: OrphanedBlock[] | null;
   coinbaseAddress: string | null;
+  coinbaseAddresses: string[] | null;
   coinbaseSignature: string | null;
   coinbaseSignatureAscii: string | null;
   virtualSize: number;
@@ -365,8 +385,9 @@ export interface CpfpCluster {
 }
 
 export interface CpfpSummary {
-  transactions: TransactionExtended[];
+  transactions: MempoolTransactionExtended[];
   clusters: CpfpCluster[];
+  version: number;
 }
 
 export interface Statistic {
@@ -432,7 +453,7 @@ export interface OptimizedStatistic {
 
 export interface TxTrackingInfo {
   replacedBy?: string,
-  position?: { block: number, vsize: number, accelerated?: boolean },
+  position?: { block: number, vsize: number, accelerated?: boolean, acceleratedBy?: number[], acceleratedAt?: number, feeDelta?: number },
   cpfp?: {
     ancestors?: Ancestor[],
     bestDescendant?: Ancestor | null,
@@ -443,6 +464,9 @@ export interface TxTrackingInfo {
   },
   utxoSpent?: { [vout: number]: { vin: number, txid: string } },
   accelerated?: boolean,
+  acceleratedBy?: number[],
+  acceleratedAt?: number,
+  feeDelta?: number,
   confirmed?: boolean
 }
 

backend/src/replication/AuditReplication.ts

@@ -31,11 +31,11 @@ class AuditReplication {
     const missingAudits = await this.$getMissingAuditBlocks();
 
     logger.debug(`Fetching missing audit data for ${missingAudits.length} blocks from trusted servers`, 'Replication');
-    
+
     let totalSynced = 0;
     let totalMissed = 0;
     let loggerTimer = Date.now();
-    // process missing audits in batches of 
+    // process missing audits in batches of BATCH_SIZE
     for (let i = 0; i < missingAudits.length; i += BATCH_SIZE) {
       const slice = missingAudits.slice(i, i + BATCH_SIZE);
       const results = await Promise.all(slice.map(hash => this.$syncAudit(hash)));
@@ -109,9 +109,11 @@ class AuditReplication {
       version: 1,
     });
     await blocksAuditsRepository.$saveAudit({
+      version: auditSummary.version || 0,
       hash: blockHash,
       height: auditSummary.height,
       time: auditSummary.timestamp || auditSummary.time,
+      unseenTxs: auditSummary.unseenTxs || [],
       missingTxs: auditSummary.missingTxs || [],
       addedTxs: auditSummary.addedTxs || [],
       prioritizedTxs: auditSummary.prioritizedTxs || [],

backend/src/replication/StatisticsReplication.ts

@@ -123,7 +123,7 @@ class StatisticsReplication {
       };
 
       const intervals = [              // [start,               end,                 label ]
-                                          [now - day,           now - 60,            '24h']       , // from 24 hours ago to now = 1 minute granularity
+                                          [now - day + 600,     now - 60,            '24h']       , // from 24 hours ago to now = 1 minute granularity
         startTime < now - day ?           [now - day * 7,       now - day,           '1w' ] : null, // from 1 week ago to 24 hours ago = 5 minutes granularity
         startTime < now - day * 7 ?       [now - day * 30,      now - day * 7,       '1m' ] : null, // from 1 month ago to 1 week ago = 30 minutes granularity
         startTime < now - day * 30 ?      [now - day * 90,      now - day * 30,      '3m' ] : null, // from 3 months ago to 1 month ago = 2 hours granularity
@@ -170,15 +170,24 @@ class StatisticsReplication {
         return new Set<number>();
       }
       
-      const roundedTimesAlreadyHere = new Set(rows.map(row => this.roundToNearestStep(row.added, step)));
+      const roundedTimesAlreadyHere: number[] = Array.from(new Set(rows.map(row => this.roundToNearestStep(row.added, step))));
-      const missingTimes = new Set(timeSteps.filter(time => !roundedTimesAlreadyHere.has(time)));
+
+      const missingTimes = timeSteps.filter(time => !roundedTimesAlreadyHere.includes(time)).filter((time, i, arr) => {
+        // Remove outsiders
+        if (i === 0) {
+          return arr[i + 1] === time + step
+        } else if (i === arr.length - 1) {
+          return arr[i - 1] === time - step;
+        }
+        return (arr[i + 1] === time + step) && (arr[i - 1] === time - step)
+      });
 
       // Don't bother fetching if very few rows are missing
-      if (missingTimes.size < timeSteps.length * 0.005) {
+      if (missingTimes.length < timeSteps.length * 0.01) {
         return new Set();
       }
 
-      return missingTimes;
+      return new Set(missingTimes);
     } catch (e: any) {
       logger.err(`Cannot fetch missing statistics times from db. Reason: ` + (e instanceof Error ? e.message : e));
       throw e;

backend/src/repositories/AccelerationRepository.ts

@@ -1,4 +1,4 @@
-import { AccelerationInfo, makeBlockTemplate } from '../api/acceleration/acceleration';
+import { AccelerationInfo } from '../api/acceleration/acceleration';
 import { RowDataPacket } from 'mysql2';
 import DB from '../database';
 import logger from '../logger';
@@ -11,6 +11,7 @@ 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';
+import { makeBlockTemplate } from '../api/mini-miner';
 
 export interface PublicAcceleration {
   txid: string,
@@ -191,6 +192,7 @@ class AccelerationRepository {
     }
   }
 
+  // modifies block transactions
   public async $indexAccelerationsForBlock(block: BlockExtended, accelerations: Acceleration[], transactions: MempoolTransactionExtended[]): Promise<void> {
     const blockTxs: { [txid: string]: MempoolTransactionExtended } = {};
     for (const tx of transactions) {
@@ -212,6 +214,15 @@ class AccelerationRepository {
         this.$saveAcceleration(accelerationInfo, block, block.extras.pool.id, successfulAccelerations);
       }
     }
+    let anyConfirmed = false;
+    for (const acc of accelerations) {
+      if (blockTxs[acc.txid]) {
+        anyConfirmed = true;
+      }
+    }
+    if (anyConfirmed) {
+      accelerationApi.accelerationConfirmed();
+    }
     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) {
@@ -308,10 +319,10 @@ class AccelerationRepository {
         }
         const accelerationSummaries = accelerations.map(acc => ({
           ...acc,
-          pools: acc.pools.map(pool => pool.pool_unique_id),
+          pools: acc.pools,
         }))
         for (const acc of accelerations) {
-          if (blockTxs[acc.txid] && acc.pools.some(pool => pool.pool_unique_id === block.extras.pool.id)) {
+          if (blockTxs[acc.txid] && acc.pools.includes(block.extras.pool.id)) {
             const tx = blockTxs[acc.txid];
             const accelerationInfo = accelerationCosts.getAccelerationInfo(tx, boostRate, transactions);
             accelerationInfo.cost = Math.max(0, Math.min(acc.feeDelta, accelerationInfo.cost));

backend/src/repositories/BlocksAuditsRepository.ts

@@ -1,13 +1,24 @@
-import blocks from '../api/blocks';
 import DB from '../database';
 import logger from '../logger';
-import { BlockAudit, AuditScore } from '../mempool.interfaces';
+import bitcoinApi from '../api/bitcoin/bitcoin-api-factory';
+import { BlockAudit, AuditScore, TransactionAudit, TransactionStripped } from '../mempool.interfaces';
+
+interface MigrationAudit {
+  version: number,
+  height: number,
+  id: string,
+  timestamp: number,
+  prioritizedTxs: string[],
+  acceleratedTxs: string[],
+  template: TransactionStripped[],
+  transactions: TransactionStripped[],
+}
 
 class BlocksAuditRepositories {
   public async $saveAudit(audit: BlockAudit): Promise<void> {
     try {
-      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)
+      await DB.query(`INSERT INTO blocks_audits(version, time, height, hash, unseen_txs, 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),
+        VALUE (?, FROM_UNIXTIME(?), ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`, [audit.version, audit.time, audit.height, audit.hash, JSON.stringify(audit.unseenTxs), 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
@@ -62,24 +73,30 @@ class BlocksAuditRepositories {
   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,
+        `SELECT
-        template,
+          blocks_audits.version,
-        missing_txs as missingTxs,
+          blocks_audits.height,
-        added_txs as addedTxs,
+          blocks_audits.hash as id,
-        prioritized_txs as prioritizedTxs,
+          UNIX_TIMESTAMP(blocks_audits.time) as timestamp,
-        fresh_txs as freshTxs,
+          template,
-        sigop_txs as sigopTxs,
+          unseen_txs as unseenTxs,
-        fullrbf_txs as fullrbfTxs,
+          missing_txs as missingTxs,
-        accelerated_txs as acceleratedTxs,
+          added_txs as addedTxs,
-        match_rate as matchRate,
+          prioritized_txs as prioritizedTxs,
-        expected_fees as expectedFees,
+          fresh_txs as freshTxs,
-        expected_weight as expectedWeight
+          sigop_txs as sigopTxs,
+          fullrbf_txs as fullrbfTxs,
+          accelerated_txs as acceleratedTxs,
+          match_rate as matchRate,
+          expected_fees as expectedFees,
+          expected_weight as expectedWeight
         FROM blocks_audits
         JOIN blocks_templates ON blocks_templates.id = blocks_audits.hash
         WHERE blocks_audits.hash = ?
       `, [hash]);
       
       if (rows.length) {
+        rows[0].unseenTxs = JSON.parse(rows[0].unseenTxs);
         rows[0].missingTxs = JSON.parse(rows[0].missingTxs);
         rows[0].addedTxs = JSON.parse(rows[0].addedTxs);
         rows[0].prioritizedTxs = JSON.parse(rows[0].prioritizedTxs);
@@ -98,6 +115,42 @@ class BlocksAuditRepositories {
     }
   }
 
+  public async $getBlockTxAudit(hash: string, txid: string): Promise<TransactionAudit | null> {
+    try {
+      const blockAudit = await this.$getBlockAudit(hash);
+
+      if (blockAudit) {
+        const isAdded = blockAudit.addedTxs.includes(txid);
+        const isPrioritized = blockAudit.prioritizedTxs.includes(txid);
+        const isAccelerated = blockAudit.acceleratedTxs.includes(txid);
+        const isConflict = blockAudit.fullrbfTxs.includes(txid);
+        let isExpected = false;
+        let firstSeen = undefined;
+        blockAudit.template?.forEach(tx => {
+          if (tx.txid === txid) {
+            isExpected = true;
+            firstSeen = tx.time;
+          }
+        });
+        const wasSeen = blockAudit.version === 1 ? !blockAudit.unseenTxs.includes(txid) : (isExpected || isPrioritized || isAccelerated);
+
+        return {
+          seen: wasSeen,
+          expected: isExpected,
+          added: isAdded && (blockAudit.version === 0 || !wasSeen),
+          prioritized: isPrioritized,
+          conflict: isConflict,
+          accelerated: isAccelerated,
+          firstSeen,
+        };
+      }
+      return null;
+    } catch (e: any) {
+      logger.err(`Cannot fetch block transaction audit from db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
   public async $getBlockAuditScore(hash: string): Promise<AuditScore> {
     try {
       const [rows]: any[] = await DB.query(
@@ -151,6 +204,96 @@ class BlocksAuditRepositories {
       throw e;
     }
   }
+
+  /**
+   * [INDEXING] Migrate audits from v0 to v1
+   */
+  public async $migrateAuditsV0toV1(): Promise<void> {
+    try {
+      let done = false;
+      let processed = 0;
+      let lastHeight;
+      while (!done) {
+        const [toMigrate]: MigrationAudit[][] = await DB.query(
+          `SELECT
+            blocks_audits.height as height,
+            blocks_audits.hash as id,
+            UNIX_TIMESTAMP(blocks_audits.time) as timestamp,
+            blocks_summaries.transactions as transactions,
+            blocks_templates.template as template,
+            blocks_audits.prioritized_txs as prioritizedTxs,
+            blocks_audits.accelerated_txs as acceleratedTxs
+          FROM blocks_audits
+          JOIN blocks_summaries ON blocks_summaries.id = blocks_audits.hash
+          JOIN blocks_templates ON blocks_templates.id = blocks_audits.hash
+          WHERE blocks_audits.version = 0
+          AND blocks_summaries.version = 2
+          ORDER BY blocks_audits.height DESC
+          LIMIT 100
+        `) as any[];
+
+        if (toMigrate.length <= 0 || lastHeight === toMigrate[0].height) {
+          done = true;
+          break;
+        }
+        lastHeight = toMigrate[0].height;
+
+        logger.info(`migrating ${toMigrate.length} audits to version 1`);
+
+        for (const audit of toMigrate) {
+          // unpack JSON-serialized transaction lists
+          audit.transactions = JSON.parse((audit.transactions as any as string) || '[]');
+          audit.template = JSON.parse((audit.template as any as string) || '[]');
+
+          // we know transactions in the template, or marked "prioritized" or "accelerated"
+          // were seen in our mempool before the block was mined.
+          const isSeen = new Set<string>();
+          for (const tx of audit.template) {
+            isSeen.add(tx.txid);
+          }
+          for (const txid of audit.prioritizedTxs) {
+            isSeen.add(txid);
+          }
+          for (const txid of audit.acceleratedTxs) {
+            isSeen.add(txid);
+          }
+          const unseenTxs = audit.transactions.slice(0).map(tx => tx.txid).filter(txid => !isSeen.has(txid));
+
+          // identify "prioritized" transactions
+          const prioritizedTxs: string[] = [];
+          let lastEffectiveRate = 0;
+          // Iterate over the mined template from bottom to top (excluding the coinbase)
+          // Transactions should appear in ascending order of mining priority.
+          for (let i = audit.transactions.length - 1; i > 0; i--) {
+            const blockTx = audit.transactions[i];
+            // If a tx has a lower in-band effective fee rate than the previous tx,
+            // it must have been prioritized out-of-band (in order to have a higher mining priority)
+            // so exclude from the analysis.
+            if ((blockTx.rate || 0) < lastEffectiveRate) {
+              prioritizedTxs.push(blockTx.txid);
+            } else {
+              lastEffectiveRate = blockTx.rate || 0;
+            }
+          }
+
+          // Update audit in the database
+          await DB.query(`
+            UPDATE blocks_audits SET
+              version = ?,
+              unseen_txs = ?,
+              prioritized_txs = ?
+            WHERE hash = ?
+          `, [1, JSON.stringify(unseenTxs), JSON.stringify(prioritizedTxs), audit.id]);
+        }
+
+        processed += toMigrate.length;
+      }
+
+      logger.info(`migrated ${processed} audits to version 1`);
+    } catch (e: any) {
+      logger.err(`Error while migrating audits from v0 to v1. Will try again later. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+  }
 }
 
 export default new BlocksAuditRepositories();

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 { RowDataPacket, escape } from 'mysql2';
+import { RowDataPacket } from 'mysql2';
 import BlocksSummariesRepository from './BlocksSummariesRepository';
 import DifficultyAdjustmentsRepository from './DifficultyAdjustmentsRepository';
 import bitcoinClient from '../api/bitcoin/bitcoin-client';
@@ -40,6 +40,7 @@ interface DatabaseBlock {
   avgFeeRate: number;
   coinbaseRaw: string;
   coinbaseAddress: string;
+  coinbaseAddresses: string;
   coinbaseSignature: string;
   coinbaseSignatureAscii: string;
   avgTxSize: number;
@@ -82,6 +83,7 @@ const BLOCK_DB_FIELDS = `
   blocks.avg_fee_rate AS avgFeeRate,
   blocks.coinbase_raw AS coinbaseRaw,
   blocks.coinbase_address AS coinbaseAddress,
+  blocks.coinbase_addresses AS coinbaseAddresses,
   blocks.coinbase_signature AS coinbaseSignature,
   blocks.coinbase_signature_ascii AS coinbaseSignatureAscii,
   blocks.avg_tx_size AS avgTxSize,
@@ -114,7 +116,7 @@ class BlocksRepository {
         pool_id,            fees,                fee_span,          median_fee,
         reward,             version,             bits,              nonce,
         merkle_root,        previous_block_hash, avg_fee,           avg_fee_rate,
-        median_timestamp,   header,              coinbase_address,
+        median_timestamp,   header,              coinbase_address,  coinbase_addresses,
         coinbase_signature, utxoset_size,        utxoset_change,    avg_tx_size,
         total_inputs,       total_outputs,       total_input_amt,   total_output_amt,
         fee_percentiles,    segwit_total_txs,    segwit_total_size, segwit_total_weight,
@@ -125,7 +127,7 @@ class BlocksRepository {
         ?, ?, ?, ?,
         ?, ?, ?, ?,
         ?, ?, ?, ?,
-        FROM_UNIXTIME(?), ?, ?,
+        FROM_UNIXTIME(?), ?, ?, ?,
         ?, ?, ?, ?,
         ?, ?, ?, ?,
         ?, ?, ?, ?,
@@ -161,6 +163,7 @@ class BlocksRepository {
         block.mediantime,
         block.extras.header,
         block.extras.coinbaseAddress,
+        block.extras.coinbaseAddresses ? JSON.stringify(block.extras.coinbaseAddresses) : null,
         truncatedCoinbaseSignature,
         block.extras.utxoSetSize,
         block.extras.utxoSetChange,
@@ -529,7 +532,7 @@ class BlocksRepository {
         return null;
       }
 
-      return await this.formatDbBlockIntoExtendedBlock(rows[0] as DatabaseBlock);  
+      return await this.formatDbBlockIntoExtendedBlock(rows[0] as DatabaseBlock);
     } catch (e) {
       logger.err(`Cannot get indexed block ${height}. Reason: ` + (e instanceof Error ? e.message : e));
       throw e;
@@ -922,6 +925,25 @@ class BlocksRepository {
     }
   }
 
+  /**
+   * Get all indexed blocks with missing coinbase addresses
+   */
+  public async $getBlocksWithoutCoinbaseAddresses(): Promise<any> {
+    try {
+      const [blocks] = await DB.query(`
+        SELECT height, hash, coinbase_addresses
+        FROM blocks
+        WHERE coinbase_addresses IS NULL AND
+          coinbase_address IS NOT NULL
+        ORDER BY height DESC
+      `);
+      return blocks;
+    } catch (e) {
+      logger.err(`Cannot get blocks with missing coinbase addresses. Reason: ` + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
   /**
    * Save indexed median fee to avoid recomputing it later
    * 
@@ -960,6 +982,44 @@ class BlocksRepository {
     }
   }
 
+  /**
+   * Save coinbase addresses
+   * 
+   * @param id
+   * @param addresses
+   */
+  public async $saveCoinbaseAddresses(id: string, addresses: string[]): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE blocks SET coinbase_addresses = ?
+        WHERE hash = ?`,
+        [JSON.stringify(addresses), id]
+      );
+    } catch (e) {
+      logger.err(`Cannot update block coinbase addresses. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Save pool
+   * 
+   * @param id
+   * @param poolId
+   */
+  public async $savePool(id: string, poolId: number): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE blocks SET pool_id = ?
+        WHERE hash = ?`,
+        [poolId, id]
+      );
+    } catch (e) {
+      logger.err(`Cannot update block pool. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
   /**
    * Convert a mysql row block into a BlockExtended. Note that you
    * must provide the correct field into dbBlk object param
@@ -999,6 +1059,7 @@ class BlocksRepository {
     extras.avgFeeRate = dbBlk.avgFeeRate;
     extras.coinbaseRaw = dbBlk.coinbaseRaw;
     extras.coinbaseAddress = dbBlk.coinbaseAddress;
+    extras.coinbaseAddresses = dbBlk.coinbaseAddresses ? JSON.parse(dbBlk.coinbaseAddresses) : [];
     extras.coinbaseSignature = dbBlk.coinbaseSignature;
     extras.coinbaseSignatureAscii = dbBlk.coinbaseSignatureAscii;
     extras.avgTxSize = dbBlk.avgTxSize;
@@ -1045,7 +1106,7 @@ class BlocksRepository {
         let summaryVersion = 0;
         if (config.MEMPOOL.BACKEND === 'esplora') {
           const txs = (await bitcoinApi.$getTxsForBlock(dbBlk.id)).map(tx => transactionUtils.extendTransaction(tx));
-          summary = blocks.summarizeBlockTransactions(dbBlk.id, txs);
+          summary = blocks.summarizeBlockTransactions(dbBlk.id, dbBlk.height, txs);
           summaryVersion = 1;
         } else {
           // Call Core RPC

backend/src/repositories/BlocksSummariesRepository.ts

@@ -114,6 +114,43 @@ class BlocksSummariesRepository {
     return [];
   }
 
+  public async $getSummariesBelowVersion(version: number): Promise<{ height: number, id: string, version: number }[]> {
+    try {
+      const [rows]: any[] = await DB.query(`
+        SELECT
+          height,
+          id,
+          version
+        FROM blocks_summaries
+        WHERE version < ?
+        ORDER BY height DESC;`, [version]);
+      return rows;
+    } catch (e) {
+      logger.err(`Cannot get block summaries below version. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+
+    return [];
+  }
+
+  public async $getTemplatesBelowVersion(version: number): Promise<{ height: number, id: string, version: number }[]> {
+    try {
+      const [rows]: any[] = await DB.query(`
+        SELECT
+          blocks_summaries.height as height,
+          blocks_templates.id as id,
+          blocks_templates.version as version
+        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 below version. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+
+    return [];
+  }
+
   /**
    * Get the fee percentiles if the block has already been indexed, [] otherwise
    * 

backend/src/repositories/CpfpRepository.ts

@@ -91,6 +91,26 @@ class CpfpRepository {
     return;
   }
 
+  public async $getClustersAt(height: number): Promise<CpfpCluster[]> {
+    const [clusterRows]: any = await DB.query(
+      `
+        SELECT *
+        FROM compact_cpfp_clusters
+        WHERE height = ?
+      `,
+      [height]
+    );
+    return clusterRows.map(cluster => {
+      if (cluster?.txs) {
+        cluster.effectiveFeePerVsize = cluster.fee_rate;
+        cluster.txs = this.unpack(cluster.txs);
+        return cluster;
+      } else {
+        return null;
+      }
+    }).filter(cluster => cluster !== null);
+  }
+
   public async $deleteClustersFrom(height: number): Promise<void> {
     logger.info(`Delete newer cpfp clusters from height ${height} from the database`);
     try {
@@ -122,6 +142,37 @@ class CpfpRepository {
     }
   }
 
+  public async $deleteClustersAt(height: number): Promise<void> {
+    logger.info(`Delete cpfp clusters at height ${height} from the database`);
+    try {
+      const [rows] = await DB.query(
+        `
+          SELECT txs, height, root from compact_cpfp_clusters
+          WHERE height = ?
+        `,
+        [height]
+      ) as RowDataPacket[][];
+      if (rows?.length) {
+        for (const clusterToDelete of rows) {
+          const txs = this.unpack(clusterToDelete?.txs);
+          for (const tx of txs) {
+            await transactionRepository.$removeTransaction(tx.txid);
+          }
+        }
+      }
+      await DB.query(
+        `
+          DELETE from compact_cpfp_clusters
+          WHERE height = ?
+        `,
+        [height]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot delete cpfp clusters from db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
   // insert a dummy row to mark that we've indexed as far as this block
   public async $insertProgressMarker(height: number): Promise<void> {
     try {
@@ -190,6 +241,32 @@ class CpfpRepository {
       return [];
     }
   }
+
+  // returns `true` if two sets of CPFP clusters are deeply identical
+  public compareClusters(clustersA: CpfpCluster[], clustersB: CpfpCluster[]): boolean {
+    if (clustersA.length !== clustersB.length) {
+      return false;
+    }
+
+    clustersA = clustersA.sort((a,b) => a.root.localeCompare(b.root));
+    clustersB = clustersB.sort((a,b) => a.root.localeCompare(b.root));
+
+    for (let i = 0; i < clustersA.length; i++) {
+      if (clustersA[i].root !== clustersB[i].root) {
+        return false;
+      }
+      if (clustersA[i].txs.length !== clustersB[i].txs.length) {
+        return false;
+      }
+      for (let j = 0; j < clustersA[i].txs.length; j++) {
+        if (clustersA[i].txs[j].txid !== clustersB[i].txs[j].txid) {
+          return false;
+        }
+      }
+    }
+
+    return true;
+  }
 }
 
 export default new CpfpRepository();

backend/src/tasks/pools-updater.ts

@@ -50,10 +50,10 @@ class PoolsUpdater {
 
       // See backend README for more details about the mining pools update process
       if (this.currentSha !== null && // If we don't have any mining pool, download it at least once
-        config.MEMPOOL.AUTOMATIC_BLOCK_REINDEXING !== true && // Automatic pools update is disabled
+        config.MEMPOOL.AUTOMATIC_POOLS_UPDATE !== true && // Automatic pools update is disabled
         !process.env.npm_config_update_pools // We're not manually updating mining pool
       ) {
-        logger.warn(`Updated mining pools data is available (${githubSha}) but AUTOMATIC_BLOCK_REINDEXING is disabled`);
+        logger.warn(`Updated mining pools data is available (${githubSha}) but AUTOMATIC_POOLS_UPDATE is disabled`);
         logger.info(`You can update your mining pools using the --update-pools command flag. You may want to clear your nginx cache as well if applicable`);
         return;
       }

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

@@ -76,7 +76,7 @@ class FreeCurrencyApi implements ConversionFeed {
   }
 
   public async $fetchConversionRates(date: string): Promise<ConversionRates> {
-    const response = await query(`${this.API_URL_PREFIX}historical?date=${date}&apikey=${this.API_KEY}`);
+    const response = await query(`${this.API_URL_PREFIX}historical?date=${date}&apikey=${this.API_KEY}`, true);
     if (response && response['data'] && (response['data'][date] || this.PAID)) {
       if (this.PAID) {
         response['data'] = this.convertData(response['data']);

backend/src/tasks/price-updater.ts

@@ -59,7 +59,7 @@ class PriceUpdater {
   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 latestConversionsRatesFromFeed: ConversionRates = { USD: -1 };
   private ratesChangedCallback: ((rates: ApiPrice) => void) | undefined;
 
   constructor() {
@@ -157,9 +157,9 @@ class PriceUpdater {
       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)}`);
+        logger.debug(`Fetched currencies conversion rates from conversions API: ${JSON.stringify(this.latestConversionsRatesFromFeed)}`);
       } catch (e) {
-        logger.err(`Cannot fetch conversion rates from the API. Reason: ${(e instanceof Error ? e.message : e)}`);
+        logger.err(`Cannot fetch conversion rates from conversions API. Reason: ${(e instanceof Error ? e.message : e)}`);
       }
     }
 
@@ -408,17 +408,17 @@ class PriceUpdater {
     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);
+        logger.debug(`Not enough conversions 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)}`);
+      logger.err(`Cannot fetch conversions 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);
+    logger.debug(`Inserting missing historical conversion rates using conversions API to fill ${priceTimesToFill.length} rows`, logger.tags.mining);
 
     let conversionRates: { [timestamp: number]: ConversionRates } = {};
     let totalInserted = 0;
@@ -430,10 +430,23 @@ class PriceUpdater {
       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 };
+        try {
-        if (conversionRates[yearMonthTimestamp]['USD'] < 0) {
+          if (year === new Date().getFullYear() && month === new Date().getMonth()) { // For rows in the current month, we use the latest conversion rates
-          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);
+            conversionRates[yearMonthTimestamp] = this.latestConversionsRatesFromFeed;
-          this.lastFailedHistoricalRun = Math.round(new Date().getTime() / 1000);
+          } else {
+            conversionRates[yearMonthTimestamp] = await this.currencyConversionFeed?.$fetchConversionRates(`${year}-${month + 1 < 10 ? `0${month + 1}` : `${month + 1}`}-15`) || { USD: -1 };
+          }
+
+          if (conversionRates[yearMonthTimestamp]['USD'] < 0) {
+            throw new Error('Incorrect USD conversion rate');
+          }
+        } catch (e) {
+          if ((e instanceof Error ? e.message : '').includes('429')) { // Continue 60 seconds later if and only if error is 429
+            this.lastFailedHistoricalRun = Math.round(new Date().getTime() / 1000);
+            logger.info(`Got a 429 error from conversions API. This is expected to happen a few times during the initial historical price insertion, process will resume in 60 seconds.`, logger.tags.mining);
+          } else {
+            logger.err(`Cannot fetch conversion rates from conversions API for ${year}-${month + 1 < 10 ? `0${month + 1}` : `${month + 1}`}-01, trying again next day. Error: ${(e instanceof Error ? e.message : e)}`, logger.tags.mining);
+          }
           break;
         }
       }

backend/src/utils/api.ts

@@ -0,0 +1,9 @@
+import { Request, Response } from 'express';
+
+export function handleError(req: Request, res: Response, statusCode: number, errorMessage: string | unknown): void {
+  if (req.accepts('json')) {
+    res.status(statusCode).json({ error: errorMessage });
+  } else {
+    res.status(statusCode).send(errorMessage);
+  }
+}

backend/src/utils/axios-query.ts

@@ -5,7 +5,7 @@ import config from '../config';
 import logger from '../logger';
 import * as https from 'https';
 
-export async function query(path): Promise<object | undefined> {
+export async function query(path, throwOnFail: boolean = false): Promise<object | undefined> {
  type axiosOptions = {
    headers: {
      'User-Agent': string
@@ -21,6 +21,7 @@ export async function query(path): Promise<object | undefined> {
    timeout: config.SOCKS5PROXY.ENABLED ? 30000 : 10000
  };
  let retry = 0;
+ let lastError: any = null;
 
  while (retry < config.MEMPOOL.EXTERNAL_MAX_RETRY) {
    try {
@@ -50,6 +51,7 @@ export async function query(path): Promise<object | undefined> {
      }
      return data.data;
    } catch (e) {
+     lastError = e;
      logger.warn(`Could not connect to ${path} (Attempt ${retry + 1}/${config.MEMPOOL.EXTERNAL_MAX_RETRY}). Reason: ` + (e instanceof Error ? e.message : e));
      retry++;
    }
@@ -59,5 +61,10 @@ export async function query(path): Promise<object | undefined> {
  }
 
  logger.err(`Could not connect to ${path}. All ${config.MEMPOOL.EXTERNAL_MAX_RETRY} attempts failed`);
+
+ if (throwOnFail && lastError) {
+    throw lastError;
+  }
+
  return undefined;
 }

backend/src/utils/bitcoin-script.ts

@@ -158,7 +158,7 @@ export function parseMultisigScript(script: string): void | { m: number, n: numb
   if (!opN) {
     return;
   }
-  if (!opN.startsWith('OP_PUSHNUM_')) {
+  if (opN !== 'OP_0' && !opN.startsWith('OP_PUSHNUM_')) {
     return;
   }
   const n = parseInt(opN.match(/[0-9]+/)?.[0] || '', 10);
@@ -178,7 +178,7 @@ export function parseMultisigScript(script: string): void | { m: number, n: numb
   if (!opM) {
     return;
   }
-  if (!opM.startsWith('OP_PUSHNUM_')) {
+  if (opM !== 'OP_0' && !opM.startsWith('OP_PUSHNUM_')) {
     return;
   }
   const m = parseInt(opM.match(/[0-9]+/)?.[0] || '', 10);

contributors/hans-crypto.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 May 21, 2024.
+
+Signed: hans-crypto

contributors/jlopp.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 July 12, 2024.
+
+Signed: jlopp

contributors/mackalex.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 June 18th, 2024.
+
+Signed: mackalex

contributors/svrgnty.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 July 9, 2024.
+
+Signed: svrgnty

docker/README.md

@@ -106,7 +106,7 @@ Below we list all settings from `mempool-config.json` and the corresponding over
     "EXTERNAL_ASSETS": [],
     "STDOUT_LOG_MIN_PRIORITY": "info",
     "INDEXING_BLOCKS_AMOUNT": false,
-    "AUTOMATIC_BLOCK_REINDEXING": false,
+    "AUTOMATIC_POOLS_UPDATE": 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",
     "CPFP_INDEXING": false,
@@ -137,7 +137,7 @@ Corresponding `docker-compose.yml` overrides:
       MEMPOOL_EXTERNAL_ASSETS: ""
       MEMPOOL_STDOUT_LOG_MIN_PRIORITY: ""
       MEMPOOL_INDEXING_BLOCKS_AMOUNT: ""
-      MEMPOOL_AUTOMATIC_BLOCK_REINDEXING: ""
+      MEMPOOL_AUTOMATIC_POOLS_UPDATE: ""
       MEMPOOL_POOLS_JSON_URL: ""
       MEMPOOL_POOLS_JSON_TREE_URL: ""
       MEMPOOL_CPFP_INDEXING: ""

docker/backend/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:20.13.1-buster-slim AS builder
+FROM node:20.15.0-buster-slim AS builder
 
 ARG commitHash
 ENV MEMPOOL_COMMIT_HASH=${commitHash}
@@ -24,7 +24,7 @@ RUN npm install --omit=dev --omit=optional
 WORKDIR /build
 RUN npm run package
 
-FROM node:20.13.1-buster-slim
+FROM node:20.15.0-buster-slim
 
 WORKDIR /backend
 

docker/backend/mempool-config.json

@@ -25,7 +25,7 @@
     "INDEXING_BLOCKS_AMOUNT": __MEMPOOL_INDEXING_BLOCKS_AMOUNT__,
     "BLOCKS_SUMMARIES_INDEXING": __MEMPOOL_BLOCKS_SUMMARIES_INDEXING__,
     "GOGGLES_INDEXING": __MEMPOOL_GOGGLES_INDEXING__,
-    "AUTOMATIC_BLOCK_REINDEXING": __MEMPOOL_AUTOMATIC_BLOCK_REINDEXING__,
+    "AUTOMATIC_POOLS_UPDATE": __MEMPOOL_AUTOMATIC_POOLS_UPDATE__,
     "AUDIT": __MEMPOOL_AUDIT__,
     "RUST_GBT": __MEMPOOL_RUST_GBT__,
     "LIMIT_GBT": __MEMPOOL_LIMIT_GBT__,
@@ -60,7 +60,8 @@
     "RETRY_UNIX_SOCKET_AFTER": __ESPLORA_RETRY_UNIX_SOCKET_AFTER__,
     "REQUEST_TIMEOUT": __ESPLORA_REQUEST_TIMEOUT__,
     "FALLBACK_TIMEOUT": __ESPLORA_FALLBACK_TIMEOUT__,
-    "FALLBACK": __ESPLORA_FALLBACK__
+    "FALLBACK": __ESPLORA_FALLBACK__,
+    "MAX_BEHIND_TIP": __ESPLORA_MAX_BEHIND_TIP__
   },
   "SECOND_CORE_RPC": {
     "HOST": "__SECOND_CORE_RPC_HOST__",

docker/backend/start.sh

@@ -26,7 +26,7 @@ __MEMPOOL_EXTERNAL_MAX_RETRY__=${MEMPOOL_EXTERNAL_MAX_RETRY:=1}
 __MEMPOOL_EXTERNAL_RETRY_INTERVAL__=${MEMPOOL_EXTERNAL_RETRY_INTERVAL:=0}
 __MEMPOOL_USER_AGENT__=${MEMPOOL_USER_AGENT:=mempool}
 __MEMPOOL_STDOUT_LOG_MIN_PRIORITY__=${MEMPOOL_STDOUT_LOG_MIN_PRIORITY:=info}
-__MEMPOOL_AUTOMATIC_BLOCK_REINDEXING__=${MEMPOOL_AUTOMATIC_BLOCK_REINDEXING:=false}
+__MEMPOOL_AUTOMATIC_POOLS_UPDATE__=${MEMPOOL_AUTOMATIC_POOLS_UPDATE:=false}
 __MEMPOOL_POOLS_JSON_URL__=${MEMPOOL_POOLS_JSON_URL:=https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json}
 __MEMPOOL_POOLS_JSON_TREE_URL__=${MEMPOOL_POOLS_JSON_TREE_URL:=https://api.github.com/repos/mempool/mining-pools/git/trees/master}
 __MEMPOOL_AUDIT__=${MEMPOOL_AUDIT:=false}
@@ -62,6 +62,7 @@ __ESPLORA_RETRY_UNIX_SOCKET_AFTER__=${ESPLORA_RETRY_UNIX_SOCKET_AFTER:=30000}
 __ESPLORA_REQUEST_TIMEOUT__=${ESPLORA_REQUEST_TIMEOUT:=5000}
 __ESPLORA_FALLBACK_TIMEOUT__=${ESPLORA_FALLBACK_TIMEOUT:=5000}
 __ESPLORA_FALLBACK__=${ESPLORA_FALLBACK:=[]}
+__ESPLORA_MAX_BEHIND_TIP__=${ESPLORA_MAX_BEHIND_TIP:=2}
 
 # SECOND_CORE_RPC
 __SECOND_CORE_RPC_HOST__=${SECOND_CORE_RPC_HOST:=127.0.0.1}
@@ -143,12 +144,12 @@ __REPLICATION_STATISTICS_START_TIME__=${REPLICATION_STATISTICS_START_TIME:=14819
 __REPLICATION_SERVERS__=${REPLICATION_SERVERS:=[]}
 
 # MEMPOOL_SERVICES
-__MEMPOOL_SERVICES_API__=${MEMPOOL_SERVICES_API:=""}
+__MEMPOOL_SERVICES_API__=${MEMPOOL_SERVICES_API:="https://mempool.space/api/v1/services"}
 __MEMPOOL_SERVICES_ACCELERATIONS__=${MEMPOOL_SERVICES_ACCELERATIONS:=false}
 
 # REDIS
 __REDIS_ENABLED__=${REDIS_ENABLED:=false}
-__REDIS_UNIX_SOCKET_PATH__=${REDIS_UNIX_SOCKET_PATH:=true}
+__REDIS_UNIX_SOCKET_PATH__=${REDIS_UNIX_SOCKET_PATH:=""}
 __REDIS_BATCH_QUERY_BASE_SIZE__=${REDIS_BATCH_QUERY_BASE_SIZE:=5000}
 
 # FIAT_PRICE
@@ -183,7 +184,7 @@ sed -i "s!__MEMPOOL_EXTERNAL_MAX_RETRY__!${__MEMPOOL_EXTERNAL_MAX_RETRY__}!g" me
 sed -i "s!__MEMPOOL_EXTERNAL_RETRY_INTERVAL__!${__MEMPOOL_EXTERNAL_RETRY_INTERVAL__}!g" mempool-config.json
 sed -i "s!__MEMPOOL_USER_AGENT__!${__MEMPOOL_USER_AGENT__}!g" mempool-config.json
 sed -i "s!__MEMPOOL_STDOUT_LOG_MIN_PRIORITY__!${__MEMPOOL_STDOUT_LOG_MIN_PRIORITY__}!g" mempool-config.json
-sed -i "s!__MEMPOOL_AUTOMATIC_BLOCK_REINDEXING__!${__MEMPOOL_AUTOMATIC_BLOCK_REINDEXING__}!g" mempool-config.json
+sed -i "s!__MEMPOOL_AUTOMATIC_POOLS_UPDATE__!${__MEMPOOL_AUTOMATIC_POOLS_UPDATE__}!g" mempool-config.json
 sed -i "s!__MEMPOOL_POOLS_JSON_URL__!${__MEMPOOL_POOLS_JSON_URL__}!g" mempool-config.json
 sed -i "s!__MEMPOOL_POOLS_JSON_TREE_URL__!${__MEMPOOL_POOLS_JSON_TREE_URL__}!g" mempool-config.json
 sed -i "s!__MEMPOOL_AUDIT__!${__MEMPOOL_AUDIT__}!g" mempool-config.json
@@ -216,6 +217,7 @@ sed -i "s!__ESPLORA_RETRY_UNIX_SOCKET_AFTER__!${__ESPLORA_RETRY_UNIX_SOCKET_AFTE
 sed -i "s!__ESPLORA_REQUEST_TIMEOUT__!${__ESPLORA_REQUEST_TIMEOUT__}!g" mempool-config.json
 sed -i "s!__ESPLORA_FALLBACK_TIMEOUT__!${__ESPLORA_FALLBACK_TIMEOUT__}!g" mempool-config.json
 sed -i "s!__ESPLORA_FALLBACK__!${__ESPLORA_FALLBACK__}!g" mempool-config.json
+sed -i "s!__ESPLORA_MAX_BEHIND_TIP__!${__ESPLORA_MAX_BEHIND_TIP__}!g" mempool-config.json
 
 sed -i "s!__SECOND_CORE_RPC_HOST__!${__SECOND_CORE_RPC_HOST__}!g" mempool-config.json
 sed -i "s!__SECOND_CORE_RPC_PORT__!${__SECOND_CORE_RPC_PORT__}!g" mempool-config.json

docker/frontend/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:20.13.1-buster-slim AS builder
+FROM node:20.15.0-buster-slim AS builder
 
 ARG commitHash
 ENV DOCKER_COMMIT_HASH=${commitHash}
@@ -13,7 +13,7 @@ RUN npm install --omit=dev --omit=optional
 
 RUN npm run build
 
-FROM nginx:1.26.0-alpine
+FROM nginx:1.27.0-alpine
 
 WORKDIR /patch
 

docker/frontend/entrypoint.sh

@@ -16,7 +16,9 @@ fi
 
 # Runtime overrides - read env vars defined in docker compose
 
+__MAINNET_ENABLED__=${MAINNET_ENABLED:=true}
 __TESTNET_ENABLED__=${TESTNET_ENABLED:=false}
+__TESTNET4_ENABLED__=${TESTNET_ENABLED:=false}
 __SIGNET_ENABLED__=${SIGNET_ENABLED:=false}
 __LIQUID_ENABLED__=${LIQUID_ENABLED:=false}
 __LIQUID_TESTNET_ENABLED__=${LIQUID_TESTNET_ENABLED:=false}
@@ -28,6 +30,7 @@ __NGINX_PORT__=${NGINX_PORT:=8999}
 __BLOCK_WEIGHT_UNITS__=${BLOCK_WEIGHT_UNITS:=4000000}
 __MEMPOOL_BLOCKS_AMOUNT__=${MEMPOOL_BLOCKS_AMOUNT:=8}
 __BASE_MODULE__=${BASE_MODULE:=mempool}
+__ROOT_NETWORK__=${ROOT_NETWORK:=}
 __MEMPOOL_WEBSITE_URL__=${MEMPOOL_WEBSITE_URL:=https://mempool.space}
 __LIQUID_WEBSITE_URL__=${LIQUID_WEBSITE_URL:=https://liquid.network}
 __MINING_DASHBOARD__=${MINING_DASHBOARD:=true}
@@ -37,12 +40,16 @@ __MAINNET_BLOCK_AUDIT_START_HEIGHT__=${MAINNET_BLOCK_AUDIT_START_HEIGHT:=0}
 __TESTNET_BLOCK_AUDIT_START_HEIGHT__=${TESTNET_BLOCK_AUDIT_START_HEIGHT:=0}
 __SIGNET_BLOCK_AUDIT_START_HEIGHT__=${SIGNET_BLOCK_AUDIT_START_HEIGHT:=0}
 __ACCELERATOR__=${ACCELERATOR:=false}
+__ACCELERATOR_BUTTON__=${ACCELERATOR_BUTTON:=true}
+__SERVICES_API__=${SERVICES_API:=https://mempool.space/api/v1/services}
 __PUBLIC_ACCELERATIONS__=${PUBLIC_ACCELERATIONS:=false}
 __HISTORICAL_PRICE__=${HISTORICAL_PRICE:=true}
 __ADDITIONAL_CURRENCIES__=${ADDITIONAL_CURRENCIES:=false}
 
 # Export as environment variables to be used by envsubst
+export __MAINNET_ENABLED__
 export __TESTNET_ENABLED__
+export __TESTNET4_ENABLED__
 export __SIGNET_ENABLED__
 export __LIQUID_ENABLED__
 export __LIQUID_TESTNET_ENABLED__
@@ -54,6 +61,7 @@ export __NGINX_PORT__
 export __BLOCK_WEIGHT_UNITS__
 export __MEMPOOL_BLOCKS_AMOUNT__
 export __BASE_MODULE__
+export __ROOT_NETWORK__
 export __MEMPOOL_WEBSITE_URL__
 export __LIQUID_WEBSITE_URL__
 export __MINING_DASHBOARD__
@@ -63,6 +71,8 @@ export __MAINNET_BLOCK_AUDIT_START_HEIGHT__
 export __TESTNET_BLOCK_AUDIT_START_HEIGHT__
 export __SIGNET_BLOCK_AUDIT_START_HEIGHT__
 export __ACCELERATOR__
+export __ACCELERATOR_BUTTON__
+export __SERVICES_API__
 export __PUBLIC_ACCELERATIONS__
 export __HISTORICAL_PRICE__
 export __ADDITIONAL_CURRENCIES__

frontend/.eslintrc

@@ -35,6 +35,7 @@
     "quotes": [1, "single", { "allowTemplateLiterals": true }],
     "semi": 1,
     "curly": [1, "all"],
-    "eqeqeq": 1
+    "eqeqeq": 1,
+    "no-trailing-spaces": 1
   }
 }

frontend/README.md

@@ -33,7 +33,7 @@ $ npm run config:defaults:liquid
 
 ### 3. Run the Frontend
 
-_Make sure to use Node.js 16.10 and npm 7._
+_Make sure to use Node.js 20.x and npm 9.x or newer._
 
 Install project dependencies and run the frontend server:
 
@@ -70,7 +70,7 @@ Set up the [Mempool backend](../backend/) first, if you haven't already.
 
 ### 1. Build the Frontend
 
-_Make sure to use Node.js 16.10 and npm 7._
+_Make sure to use Node.js 20.x and npm 9.x or newer._
 
 Build the frontend:
 

frontend/angular.json

@@ -54,6 +54,10 @@
             "translation": "src/locale/messages.fr.xlf",
             "baseHref": "/fr/"
           },
+          "hr": {
+            "translation": "src/locale/messages.hr.xlf",
+            "baseHref": "/hr/"
+          },
           "ja": {
             "translation": "src/locale/messages.ja.xlf",
             "baseHref": "/ja/"

frontend/cypress/e2e/liquid/liquid.spec.ts

@@ -72,20 +72,6 @@ describe('Liquid', () => {
       });
     });
 
-    it('renders unconfidential addresses correctly on mobile', () => {
-      cy.viewport('iphone-6');
-      cy.visit(`${basePath}/address/ex1qqmmjdwrlg59c8q4l75sj6wedjx57tj5grt8pat`);
-      cy.waitForSkeletonGone();
-      //TODO: Add proper IDs for these selectors
-      const firstRowSelector = '.container-xl > :nth-child(3) > div > :nth-child(1) > .table > tbody';
-      const thirdRowSelector = '.container-xl > :nth-child(3) > div > :nth-child(3)';
-      cy.get(firstRowSelector).invoke('css', 'width').then(firstRowWidth => {
-        cy.get(thirdRowSelector).invoke('css', 'width').then(thirdRowWidth => {
-          expect(parseInt(firstRowWidth)).to.be.lessThan(parseInt(thirdRowWidth));
-        });
-      });
-    });
-
     describe('peg in/peg out', () => {
       it('loads peg in addresses', () => {
         cy.visit(`${basePath}/tx/fe764f7bedfc2a37b29d9c8aef67d64a57d253a6b11c5a55555cfd5826483a58`);

frontend/cypress/e2e/mainnet/mainnet.spec.ts

@@ -144,13 +144,13 @@ describe('Mainnet', () => {
         });
       });
 
-      ['BC1PQYQSZQ', 'bc1PqYqSzQ'].forEach((searchTerm) => {
+      ['BC1PQYQS', 'bc1PqYqS'].forEach((searchTerm) => {
         it(`allows searching for partial case insensitive bech32m addresses: ${searchTerm}`, () => {
           cy.visit('/');
           cy.get('.search-box-container > .form-control').type(searchTerm).then(() => {
-            cy.get('app-search-results button.dropdown-item').should('have.length', 1);
+            cy.get('app-search-results button.dropdown-item').should('have.length', 10);
             cy.get('app-search-results button.dropdown-item.active').click().then(() => {
-              cy.url().should('include', '/address/bc1pqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsyjer9e');
+              cy.url().should('include', '/address/bc1pqyqs26fs4gnyw4aqttyjqa5ta7075zzfjftyz98qa8vdr49dh7fqm2zkv3');
               cy.waitForSkeletonGone();
               cy.get('.text-center').should('not.have.text', 'Invalid Bitcoin address');
             });
@@ -158,13 +158,13 @@ describe('Mainnet', () => {
         });
       });
 
-      ['BC1Q000375VXCU', 'bC1q000375vXcU'].forEach((searchTerm) => {
+      ['BC1Q0003', 'bC1q0003'].forEach((searchTerm) => {
         it(`allows searching for partial case insensitive bech32 addresses: ${searchTerm}`, () => {
           cy.visit('/');
           cy.get('.search-box-container > .form-control').type(searchTerm).then(() => {
-            cy.get('app-search-results button.dropdown-item').should('have.length', 1);
+            cy.get('app-search-results button.dropdown-item').should('have.length', 10);
             cy.get('app-search-results button.dropdown-item.active').click().then(() => {
-              cy.url().should('include', '/address/bc1q000375vxcuf5v04lmwy22vy2thvhqkxghgq7dy');
+              cy.url().should('include', '/address/bc1q000303cgr9zazthut63kdktwtatfe206um8nyh');
               cy.waitForSkeletonGone();
               cy.get('.text-center').should('not.have.text', 'Invalid Bitcoin address');
             });
@@ -543,16 +543,7 @@ describe('Mainnet', () => {
           }
         });
 
-        cy.get('.alert').should('be.visible');
+        cy.get('.alert-replaced').should('be.visible');
-        cy.get('.alert').invoke('css', 'width').then((alertWidth) => {
-          cy.get('.container-xl > :nth-child(3)').invoke('css', 'width').should('equal', alertWidth);
-        });
-
-        cy.get('.btn-warning').then(getRectangle).then((rectA) => {
-          cy.get('.alert').then(getRectangle).then((rectB) => {
-            expect(areOverlapping(rectA, rectB), 'Confirmations box and RBF alert are overlapping').to.be.false;
-          });
-        });
       });
 
       it('shows RBF transactions properly (desktop)', () => {
@@ -603,4 +594,63 @@ describe('Mainnet', () => {
   } else {
     it.skip(`Tests cannot be run on the selected BASE_MODULE ${baseModule}`);
   }
+
+  describe('Accelerated Transactions', () => {
+    describe('Unconfirmed Accelerated Transaction', () => {
+      before(() => {
+        cy.intercept('/api/tx/40ba6b3c4ce73e3ba0160c137b1cc6c2c7333a2b9c19537b61ee8a8aaf095e0a', {
+          fixture: 'accelerated_tx.json'
+        }).as('tx');
+
+        cy.intercept('/api/v1/cpfp/40ba6b3c4ce73e3ba0160c137b1cc6c2c7333a2b9c19537b61ee8a8aaf095e0a', {
+          fixture: 'accelerated_cpfp.json'
+        }).as('accelerated_cpfp');
+
+        cy.intercept('/api/v1/transaction-times?txId%5B%5D=40ba6b3c4ce73e3ba0160c137b1cc6c2c7333a2b9c19537b61ee8a8aaf095e0a', {
+          body: '[1723416086]',
+        }).as('transaction-time');
+
+        cy.intercept('https://mempool.space/api/v1/services/accelerator/accelerations/history', {
+          fixture: 'accelerated_history.json'
+        }).as('history');
+
+        cy.viewport('macbook-16');
+        cy.mockMempoolSocket();
+        cy.visit('/tx/40ba6b3c4ce73e3ba0160c137b1cc6c2c7333a2b9c19537b61ee8a8aaf095e0a');
+
+        emitMempoolInfo({
+          'params': {
+            command: 'txPosition'
+          }
+        });
+        cy.waitForSkeletonGone();
+      });
+
+      it('shows unconfirmed accelerated transaction properly', () => {
+        cy.get('.badge-accelerated').should('exist');
+        cy.get('[data-cy="active-acceleration-box"]').should('exist');
+        cy.get('[data-cy="active-acceleration-box"] > table > tbody > :nth-child(1) .oobFees').invoke('text').should('contain', `15.5 `);
+        cy.get('[data-cy="tx-fee-delta"]').invoke('text').should('contain', `3,000`);
+        cy.get('#acceleration-timeline').should('be.visible');
+      });
+
+      // currently doesn't work due to 'accelerations/history' endpoint not being intercepted
+      it.skip('properly render accelerated transacion as it confirms', () => {
+        emitMempoolInfo({
+          'params': {
+            command: 'txPositionConfirmed'
+          }
+        });
+
+        cy.wait(1000);
+
+        cy.get('.badge-accelerated').should('exist');
+        cy.get('[data-cy="active-acceleration-box"]').should('not.exist');
+        cy.get('[data-cy="fee-rate"]').invoke('text').should('contain', `2.17 `);
+        cy.get('[data-cy="tx-fee-delta"]').invoke('text').should('contain', `39`);
+        cy.get('#acceleration-timeline').should('be.visible');
+      });
+    });
+  });
+
 });

frontend/cypress/fixtures/accelerated_cpfp.json

@@ -0,0 +1,20 @@
+{
+  "ancestors": [],
+  "bestDescendant": null,
+  "descendants": [],
+  "effectiveFeePerVsize": 15.452914798206278,
+  "sigops": 4,
+  "fee": 446,
+  "adjustedVsize": 223,
+  "acceleration": true,
+  "acceleratedBy": [
+      111,
+      43,
+      102,
+      112,
+      142,
+      115
+  ],
+  "acceleratedAt": 1723417553,
+  "feeDelta": 3000
+}

frontend/cypress/fixtures/accelerated_history.json

@@ -0,0 +1,24 @@
+[
+  {
+      "txid": "40ba6b3c4ce73e3ba0160c137b1cc6c2c7333a2b9c19537b61ee8a8aaf095e0a",
+      "status": "completed",
+      "added": 1723417553,
+      "lastUpdated": 1723424127,
+      "effectiveFee": 446,
+      "effectiveVsize": 223,
+      "feeDelta": 3000,
+      "blockHash": "000000000000000000005bc0a822da172e43c687428cc268177ad27d636f3059",
+      "blockHeight": 856387,
+      "bidBoost": 39,
+      "boostVersion": "v2",
+      "pools": [
+          111,
+          43,
+          102,
+          112,
+          142,
+          115
+      ],
+      "minedByPoolUniqueId": 111
+  }
+]

frontend/cypress/fixtures/accelerated_position.json

@@ -0,0 +1,48 @@
+{
+  "txPosition": {
+      "txid": "40ba6b3c4ce73e3ba0160c137b1cc6c2c7333a2b9c19537b61ee8a8aaf095e0a",
+      "position": {
+          "block": 0,
+          "vsize": 37321.5,
+          "accelerated": true
+      },
+      "accelerationPositions": [
+          {
+              "block": 0,
+              "vsize": 37321.5,
+              "poolId": 111,
+              "pool": "Foundry USA"
+          },
+          {
+              "block": 0,
+              "vsize": 37321.5,
+              "poolId": 43,
+              "pool": "Braiins Pool"
+          },
+          {
+              "block": 0,
+              "vsize": 37321.5,
+              "poolId": 102,
+              "pool": "SpiderPool"
+          },
+          {
+              "block": 0,
+              "vsize": 37321.5,
+              "poolId": 112,
+              "pool": "SBI Crypto"
+          },
+          {
+              "block": 0,
+              "vsize": 37321.5,
+              "poolId": 142,
+              "pool": "OCEAN"
+          },
+          {
+              "block": 0,
+              "vsize": 37321.5,
+              "poolId": 115,
+              "pool": "MARA Pool"
+          }
+      ]
+  }
+}

frontend/cypress/fixtures/accelerated_position_confirmed.json

@@ -0,0 +1,66 @@
+{
+  "txConfirmed": "40ba6b3c4ce73e3ba0160c137b1cc6c2c7333a2b9c19537b61ee8a8aaf095e0a",
+  "block":{
+    "id": "000000000000000000014cc3d86b7c096ef92aca180e3cf27d72e34ce944caed",
+    "height": 837051,
+    "version": 821051392,
+    "timestamp": 1723452588,
+    "bits": 386079422,
+    "nonce": 2215159619,
+    "difficulty": 90666502495565.78,
+    "merkle_root": "207ad51f6c1150f63fcd043eb1b4624b77ac70558594317e989c1109fbb47c47",
+    "tx_count": 2284,
+    "size": 1490522,
+    "weight": 3993155,
+    "previousblockhash": "00000000000000000002b8a66307c997aa27bf99a384ceb7cfe5f29576eddb26",
+    "mediantime": 1723450608,
+    "stale": false,
+    "extras": {
+      "reward": 319417632,
+      "coinbaseRaw": "0378110d04adccb9662f466f756e6472792055534120506f6f6c202364726f70676f6c642f2c08727fca05000000000000",
+      "orphans": [],
+      "medianFee": 4.021446911342697,
+      "feeRange": [
+        3.1,
+        3.4184397163120566,
+        3.998624011007912,
+        4.444976076555024,
+        5.382978723404255,
+        11.62814371257485,
+        468.75
+      ],
+      "totalFees": 6917632,
+      "avgFee": 3030,
+      "avgFeeRate": 6,
+      "utxoSetChange": -2647,
+      "avgTxSize": 652.44,
+      "totalInputs": 8544,
+      "totalOutputs": 5897,
+      "totalOutputAmt": 2950130527407,
+      "segwitTotalTxs": 2084,
+      "segwitTotalSize": 1137877,
+      "segwitTotalWeight": 2582683,
+      "feePercentiles": null,
+      "virtualSize": 998288.75,
+      "coinbaseAddress": "bc1p8k4v4xuz55dv49svzjg43qjxq2whur7ync9tm0xgl5t4wjl9ca9snxgmlt",
+      "coinbaseAddresses": [
+        "bc1p8k4v4xuz55dv49svzjg43qjxq2whur7ync9tm0xgl5t4wjl9ca9snxgmlt",
+        "bc1qxhmdufsvnuaaaer4ynz88fspdsxq2h9e9cetdj"
+      ],
+      "coinbaseSignature": "OP_PUSHNUM_1 OP_PUSHBYTES_32 3daaca9b82a51aca960c1491588246029d7e0fc49e0abdbcc8fd17574be5c74b",
+      "coinbaseSignatureAscii": "f/Foundry USA Pool #dropgold/",
+      "header": "0040f03026dbed7695f2e5cfb7ce84a399bf27aa97c90763a6b802000000000000000000477cb4fb09119c987e3194855570ac774b62b4b13e04cd3ff650116c1fd57a20acccb966be1a031743a70884",
+      "utxoSetSize": null,
+      "totalInputAmt": null,
+      "pool": {
+        "id": 111,
+        "name": "Foundry USA",
+        "slug": "foundryusa"
+      },
+      "matchRate": 100,
+      "expectedFees": 6957093,
+      "expectedWeight": 3991895,
+      "similarity": 0.9907343565880212
+    }
+  }
+}

frontend/cypress/fixtures/accelerated_tx.json

@@ -0,0 +1,45 @@
+{
+  "txid": "40ba6b3c4ce73e3ba0160c137b1cc6c2c7333a2b9c19537b61ee8a8aaf095e0a",
+  "version": 1,
+  "locktime": 0,
+  "vin": [
+      {
+          "txid": "7c6e17739d7225d097db1f08df17d06dc712dc0951f266db1070939b85b5e8e7",
+          "vout": 0,
+          "prevout": {
+              "scriptpubkey": "76a914fb706ea28ba8f83e3cfa2fa1f3f01a6a613b94ca88ac",
+              "scriptpubkey_asm": "OP_DUP OP_HASH160 OP_PUSHBYTES_20 fb706ea28ba8f83e3cfa2fa1f3f01a6a613b94ca OP_EQUALVERIFY OP_CHECKSIG",
+              "scriptpubkey_type": "p2pkh",
+              "scriptpubkey_address": "1PvVJ5FvkNnsatmD4nfkb6j59CjKq7dxxy",
+              "value": 16610556
+          },
+          "scriptsig": "483045022100811726483f9c91dd91aa136c6ba4e97e6db79ef7026aa4fdd4216ea6a954f91a0220508b7fdf4078bf82114f7cfed5090b77114dec19b122870a34e562689441399d01210275f84bf0270b233f83be9b1ba6549e3281a133bfd93b24e1c16d80c4e742f09e",
+          "scriptsig_asm": "OP_PUSHBYTES_72 3045022100811726483f9c91dd91aa136c6ba4e97e6db79ef7026aa4fdd4216ea6a954f91a0220508b7fdf4078bf82114f7cfed5090b77114dec19b122870a34e562689441399d01 OP_PUSHBYTES_33 0275f84bf0270b233f83be9b1ba6549e3281a133bfd93b24e1c16d80c4e742f09e",
+          "is_coinbase": false,
+          "sequence": 4294967295
+      }
+  ],
+  "vout": [
+      {
+          "scriptpubkey": "0014ce6c0bb00482016d12657174b6468cd01df6421e",
+          "scriptpubkey_asm": "OP_0 OP_PUSHBYTES_20 ce6c0bb00482016d12657174b6468cd01df6421e",
+          "scriptpubkey_type": "v0_p2wpkh",
+          "scriptpubkey_address": "bc1qeekqhvqysgqk6yn9w96tv35v6qwlvss7vuvtj0",
+          "value": 6796193
+      },
+      {
+          "scriptpubkey": "76a914fb706ea28ba8f83e3cfa2fa1f3f01a6a613b94ca88ac",
+          "scriptpubkey_asm": "OP_DUP OP_HASH160 OP_PUSHBYTES_20 fb706ea28ba8f83e3cfa2fa1f3f01a6a613b94ca OP_EQUALVERIFY OP_CHECKSIG",
+          "scriptpubkey_type": "p2pkh",
+          "scriptpubkey_address": "1PvVJ5FvkNnsatmD4nfkb6j59CjKq7dxxy",
+          "value": 9813917
+      }
+  ],
+  "size": 223,
+  "weight": 892,
+  "sigops": 4,
+  "fee": 446,
+  "status": {
+      "confirmed": false
+  }
+}

frontend/cypress/fixtures/mainnet_mempoolInfo.json

@@ -750,7 +750,7 @@
     },
     "backendInfo": {
       "hostname": "node205.tk7.mempool.space",
-      "version": "3.0.0-dev",
+      "version": "3.1.0-dev",
       "gitCommit": "abbc8a134",
       "lightning": false
     },

frontend/cypress/support/websocket.ts

@@ -96,6 +96,18 @@ export const emitMempoolInfo = ({
 				});
 				break;
 			}
+			case 'txPosition': {
+				cy.readFile('cypress/fixtures/accelerated_position.json', 'ascii').then((fixture) => {
+					win.mockSocket.send(JSON.stringify(fixture));
+				});
+				break;
+			}
+			case 'txPositionConfirmed': {
+				cy.readFile('cypress/fixtures/accelerated_position_confirmed.json', 'ascii').then((fixture) => {
+					win.mockSocket.send(JSON.stringify(fixture));
+				});
+				break;
+			}
 			default:
 				break;
 		}

frontend/mempool-frontend-config.sample.json

@@ -4,6 +4,7 @@
   "SIGNET_ENABLED": false,
   "LIQUID_ENABLED": false,
   "LIQUID_TESTNET_ENABLED": false,
+  "MAINNET_ENABLED": true,
   "ITEMS_PER_PAGE": 10,
   "KEEP_BLOCKS_AMOUNT": 8,
   "NGINX_PROTOCOL": "http",
@@ -12,6 +13,7 @@
   "BLOCK_WEIGHT_UNITS": 4000000,
   "MEMPOOL_BLOCKS_AMOUNT": 8,
   "BASE_MODULE": "mempool",
+  "ROOT_NETWORK": "",
   "MEMPOOL_WEBSITE_URL": "https://mempool.space",
   "LIQUID_WEBSITE_URL": "https://liquid.network",
   "MINING_DASHBOARD": true,
@@ -23,5 +25,7 @@
   "HISTORICAL_PRICE": true,
   "ADDITIONAL_CURRENCIES": false,
   "ACCELERATOR": false,
-  "PUBLIC_ACCELERATIONS": false
+  "ACCELERATOR_BUTTON": true,
+  "PUBLIC_ACCELERATIONS": false,
+  "SERVICES_API": "https://mempool.space/api/v1/services"
 }

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mempool-frontend",
-  "version": "3.0.0-dev",
+  "version": "3.1.0-dev",
   "description": "Bitcoin mempool visualizer and blockchain explorer backend",
   "license": "GNU Affero General Public License v3.0",
   "homepage": "https://mempool.space",
@@ -76,9 +76,9 @@
     "@angular/router": "^17.3.1",
     "@angular/ssr": "^17.3.1",
     "@fortawesome/angular-fontawesome": "~0.14.1",
-    "@fortawesome/fontawesome-common-types": "~6.5.1",
+    "@fortawesome/fontawesome-common-types": "~6.6.0",
-    "@fortawesome/fontawesome-svg-core": "~6.5.1",
+    "@fortawesome/fontawesome-svg-core": "~6.6.0",
-    "@fortawesome/free-solid-svg-icons": "~6.5.1",
+    "@fortawesome/free-solid-svg-icons": "~6.6.0",
     "@mempool/mempool.js": "2.3.0",
     "@ng-bootstrap/ng-bootstrap": "^16.0.0",
     "@types/qrcode": "~1.5.0",
@@ -92,10 +92,10 @@
     "ngx-infinite-scroll": "^17.0.0",
     "qrcode": "1.5.1",
     "rxjs": "~7.8.1",
-    "esbuild": "^0.21.1",
+    "esbuild": "^0.24.0",
     "tinyify": "^4.0.0",
     "tlite": "^0.1.9",
-    "tslib": "~2.6.0",
+    "tslib": "~2.7.0",
     "zone.js": "~0.14.4"
   },
   "devDependencies": {
@@ -115,7 +115,7 @@
   "optionalDependencies": {
     "@cypress/schematic": "^2.5.0",
     "@types/cypress": "^1.1.3",
-    "cypress": "^13.10.0",
+    "cypress": "^13.14.0",
     "cypress-fail-on-console-error": "~5.1.0",
     "cypress-wait-until": "^2.0.1",
     "mock-socket": "~9.3.1",

frontend/proxy.conf.local-esplora.js

@@ -78,6 +78,18 @@ PROXY_CONFIG.push(...[
         "^/testnet": ""
     },
   },
+  /* Optional proxy to route dev to official acceleration services
+  {
+    context: ['/api/v1/services/accelerator/**'],
+    target: `https://mempool.space/api/v1/services/accelerator/`,
+    secure: false,
+    changeOrigin: true,
+    proxyTimeout: 30000,
+    pathRewrite: {
+      "^/api/v1/services/accelerator": ""
+    },
+  },
+  */
   {
     context: ['/api/v1/services/**'],
     target: `http://localhost:9000`,

frontend/src/app/app-routing.module.ts

@@ -9,6 +9,7 @@ import { StatusViewComponent } from './components/status-view/status-view.compon
 import { AddressGroupComponent } from './components/address-group/address-group.component';
 import { TrackerComponent } from './components/tracker/tracker.component';
 import { AccelerateCheckout } from './components/accelerate-checkout/accelerate-checkout.component';
+import { TrackerGuard } from './route-guards';
 
 const browserWindow = window || {};
 // @ts-ignore
@@ -140,15 +141,17 @@ let routes: Routes = [
     loadChildren: () => import('./bitcoin-graphs.module').then(m => m.BitcoinGraphsModule),
     data: { preload: true },
   },
+  {
+    path: 'tx',
+    canMatch: [TrackerGuard],
+    runGuardsAndResolvers: 'always',
+    loadChildren: () => import('./components/tracker/tracker.module').then(m => m.TrackerModule),
+  },
   {
     path: '',
     loadChildren: () => import('./master-page.module').then(m => m.MasterPageModule),
     data: { preload: true },
   },
-  {
-    path: 'tracker/:id',
-    component: TrackerComponent,
-  },
   {
     path: 'wallet',
     children: [],
@@ -212,10 +215,6 @@ let routes: Routes = [
     loadChildren: () => import('./bitcoin-graphs.module').then(m => m.BitcoinGraphsModule),
     data: { preload: true },
   },
-  {
-    path: '**',
-    redirectTo: ''
-  },
 ];
 
 if (browserWindowEnv && browserWindowEnv.BASE_MODULE === 'liquid') {
@@ -300,13 +299,16 @@ if (browserWindowEnv && browserWindowEnv.BASE_MODULE === 'liquid') {
       loadChildren: () => import('./liquid/liquid-graphs.module').then(m => m.LiquidGraphsModule),
       data: { preload: true },
     },
-    {
-      path: '**',
-      redirectTo: ''
-    },
   ];
 }
 
+if (!window['isMempoolSpaceBuild']) {
+  routes.push({
+    path: '**',
+    redirectTo: ''
+  });
+}
+
 @NgModule({
   imports: [RouterModule.forRoot(routes, {
     initialNavigation: 'enabledBlocking',

frontend/src/app/app.constants.ts

@@ -151,7 +151,7 @@ export const languages: Language[] = [
    { code: 'fr', name: 'Français' },        // French
 // { code: 'gl', name: 'Galego' },          // Galician
    { code: 'ko', name: '한국어' },          // Korean
-// { code: 'hr', name: 'Hrvatski' },        // Croatian
+   { code: 'hr', name: 'Hrvatski' },        // Croatian
 // { code: 'id', name: 'Bahasa Indonesia' },// Indonesian
    { code: 'hi', name: 'हिन्दी' },             // Hindi
    { code: 'ne', name: 'नेपाली' },            // Nepalese

frontend/src/app/app.module.ts

@@ -27,6 +27,7 @@ import { ShortenStringPipe } from './shared/pipes/shorten-string-pipe/shorten-st
 import { CapAddressPipe } from './shared/pipes/cap-address-pipe/cap-address-pipe';
 import { AppPreloadingStrategy } from './app.preloading-strategy';
 import { ServicesApiServices } from './services/services-api.service';
+import { DatePipe } from '@angular/common';
 
 const providers = [
   ElectrsApiService,
@@ -45,6 +46,7 @@ const providers = [
   FiatShortenerPipe,
   FiatCurrencyPipe,
   CapAddressPipe,
+  DatePipe,
   AppPreloadingStrategy,
   ServicesApiServices,
   PreloadService,

frontend/src/app/bitcoin.utils.ts

@@ -1,4 +1,5 @@
 import { Transaction, Vin } from './interfaces/electrs.interface';
+import { Hash } from './shared/sha256';
 
 const P2SH_P2WPKH_COST = 21 * 4; // the WU cost for the non-witness part of P2SH-P2WPKH
 const P2SH_P2WSH_COST  = 35 * 4; // the WU cost for the non-witness part of P2SH-P2WSH
@@ -70,19 +71,24 @@ export function calcSegwitFeeGains(tx: Transaction) {
     }
 
     if (isP2tr) {
-      if (vin.witness.length === 1) {
+      // every valid taproot input has at least one witness item, however transactions
-        // key path spend
+      // created before taproot activation don't need to have any witness data
-        // we don't know if this was a multisig or single sig (the goal of taproot :)),
+      // (see https://mempool.space/tx/b10c007c60e14f9d087e0291d4d0c7869697c6681d979c6639dbd960792b4d41)
-        // so calculate fee savings by comparing to the cheapest single sig input type: P2WPKH and say "saved at least ...%"
+      if (vin.witness?.length) {
-        // the witness size of P2WPKH is 1 (stack size) + 1 (size) + 72 (low s signature) + 1 (size) + 33 (pubkey) = 108 WU
+        if (vin.witness.length === 1) {
-        // the witness size of key path P2TR is 1 (stack size) + 1 (size) + 64 (signature) = 66 WU
+          // key path spend
-        realizedTaprootGains += 42;
+          // we don't know if this was a multisig or single sig (the goal of taproot :)),
-      } else {
+          // so calculate fee savings by comparing to the cheapest single sig input type: P2WPKH and say "saved at least ...%"
-        // script path spend
+          // the witness size of P2WPKH is 1 (stack size) + 1 (size) + 72 (low s signature) + 1 (size) + 33 (pubkey) = 108 WU
-        // complex scripts with multiple spending paths can often be made around 2x to 3x smaller with the Taproot script tree
+          // the witness size of key path P2TR is 1 (stack size) + 1 (size) + 64 (signature) = 66 WU
-        // because only the hash of the alternative spending path has the be in the witness data, not the entire script,
+          realizedTaprootGains += 42;
-        // but only assumptions can be made because the scripts themselves are unknown (again, the goal of taproot :))
+        } else {
-        // TODO maybe add some complex scripts that are specified somewhere, so that size is known, such as lightning scripts
+          // script path spend
+          // complex scripts with multiple spending paths can often be made around 2x to 3x smaller with the Taproot script tree
+          // because only the hash of the alternative spending path has the be in the witness data, not the entire script,
+          // but only assumptions can be made because the scripts themselves are unknown (again, the goal of taproot :))
+          // TODO maybe add some complex scripts that are specified somewhere, so that size is known, such as lightning scripts
+        }
       }
     } else {
       const script = isP2shP2Wsh || isP2wsh ? vin.inner_witnessscript_asm : vin.inner_redeemscript_asm;
@@ -129,7 +135,7 @@ export function parseMultisigScript(script: string): void | { m: number, n: numb
     return;
   }
   const opN = ops.pop();
-  if (!opN.startsWith('OP_PUSHNUM_')) {
+  if (opN !== 'OP_0' && !opN.startsWith('OP_PUSHNUM_')) {
     return;
   }
   const n = parseInt(opN.match(/[0-9]+/)[0], 10);
@@ -146,7 +152,7 @@ export function parseMultisigScript(script: string): void | { m: number, n: numb
     }
   }
   const opM = ops.pop();
-  if (!opM.startsWith('OP_PUSHNUM_')) {
+  if (opM !== 'OP_0' && !opM.startsWith('OP_PUSHNUM_')) {
     return;
   }
   const m = parseInt(opM.match(/[0-9]+/)[0], 10);
@@ -292,8 +298,8 @@ export async function calcScriptHash$(script: string): Promise<string> {
     throw new Error('script is not a valid hex string');
   }
   const buf = Uint8Array.from(script.match(/.{2}/g).map((byte) => parseInt(byte, 16)));
-  const hashBuffer = await crypto.subtle.digest('SHA-256', buf);
+  const hash = new Hash().update(buf).digest();
-  const hashArray = Array.from(new Uint8Array(hashBuffer));
+  const hashArray = Array.from(new Uint8Array(hash));
   return hashArray
     .map((bytes) => bytes.toString(16).padStart(2, '0'))
     .join('');

frontend/src/app/components/about/about.component.html

@@ -53,13 +53,26 @@
         <span>Spiral</span>
       </a>
       <a href="https://foundrydigital.com/" target="_blank" title="Foundry">
-        <svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="-10 -10 100 100" class="image">
+        <svg xmlns="http://www.w3.org/2000/svg" id="b" data-name="Layer 2" style="zoom: 1;" width="32" height="90" viewBox="0 -5 32 90" class="image">
-          <g stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+          <defs>
-            <g transform="translate(-186.000000, -2316.000000)">
+            <style>
-              <g transform="translate(186.000000, 2316.000000)">
+              .d {
-                <rect id="" fill="#023D32" x="-10" y="-10" width="100" height="100" rx="8"></rect>
+                fill: #fff;
-                <path d="M61.6666667,9.16666667 L61.6666667,17.0041667 L46.2625,17.0041667 C46.2625,17.0041667 44.1666667,16.6666667 44.1666667,18.3333333 L44.1666667,25.8025 L61.6666667,25.8025 L61.6666667,34.7391667 L44.1666667,34.7391667 L44.1666667,70.5575 L31.7825,70.5575 L31.7825,35 L19.1666667,35 L19.1666667,25.595 L31.6666667,25.595 L31.6666667,17.5 C31.6666667,17.5 32.5,9.16666667 40.4166667,9.16666667 L61.6666667,9.16666667 Z" id="Fill-1" fill="#86E2A0"></path>
+              }
-              </g>
+
+              .e {
+                fill: #ff8200;
+              }
+            </style>
+          </defs>
+          <g id="c" data-name="b">
+            <circle class="e" cx="24" cy="32" r="8" />
+            <circle class="e" cx="24" cy="56" r="8" />
+            <circle class="e" cx="8" cy="68" r="8" />
+            <g>
+              <circle class="d" cx="24" cy="8" r="8" />
+              <circle class="d" cx="8" cy="20" r="8" />
+              <circle class="d" cx="8" cy="44" r="8" />
             </g>
           </g>
         </svg>
@@ -112,17 +125,14 @@
         <span>Blockstream</span>
       </a>
       <a href="https://unchained.com/" target="_blank" title="Unchained">
-        <svg id="Layer_1" width="78" height="78" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 156.68 156.68"><defs><style>.cls-unchained-1{fill:#fff;}</style></defs><path class="cls-unchained-1" d="m78.34,0C35.07,0,0,35.07,0,78.34s35.07,78.34,78.34,78.34,78.34-35.07,78.34-78.34S121.6,0,78.34,0ZM20.23,109.5c-4.99-9.28-7.81-19.89-7.81-31.16C12.42,41.93,41.93,12.42,78.34,12.42c33.15,0,60.58,24.46,65.23,56.32h-37.48c-45.29,0-71.19,20.05-85.85,40.76Zm58.11,34.76c-12.42,0-24.04-3.44-33.96-9.41,3.94-8.85,9.11-18.7,15.84-28.9,20.99-31.8,52.2-31.19,76.49-31.19h7.45c.06,1.18.1,2.38.1,3.58,0,36.41-29.51,65.92-65.92,65.92Z"/><path class="cls-unchained-1" d="m91.98,42.4l-3.62-1.18c-3.94-1.29-7.03-4.38-8.32-8.32l-1.18-3.63c-.13-.39-.68-.39-.81,0l-1.18,3.63c-1.29,3.94-4.38,7.03-8.32,8.32l-3.62,1.18c-.39.13-.39.68,0,.81l3.62,1.18c3.94,1.29,7.03,4.38,8.32,8.32l1.18,3.63c.13.39.68.39.81,0l1.18-3.63c1.29-3.94,4.38-7.03,8.32-8.32l3.62-1.18c.39-.13.39-.68,0-.81Z"/></svg>
+        <svg id="Layer_1" width="78" height="78" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 156.68 156.68" class="image">
+          <defs><style>.cls-unchained-1{fill:#fff;}</style></defs><path class="cls-unchained-1" d="m78.34,0C35.07,0,0,35.07,0,78.34s35.07,78.34,78.34,78.34,78.34-35.07,78.34-78.34S121.6,0,78.34,0ZM20.23,109.5c-4.99-9.28-7.81-19.89-7.81-31.16C12.42,41.93,41.93,12.42,78.34,12.42c33.15,0,60.58,24.46,65.23,56.32h-37.48c-45.29,0-71.19,20.05-85.85,40.76Zm58.11,34.76c-12.42,0-24.04-3.44-33.96-9.41,3.94-8.85,9.11-18.7,15.84-28.9,20.99-31.8,52.2-31.19,76.49-31.19h7.45c.06,1.18.1,2.38.1,3.58,0,36.41-29.51,65.92-65.92,65.92Z"/><path class="cls-unchained-1" d="m91.98,42.4l-3.62-1.18c-3.94-1.29-7.03-4.38-8.32-8.32l-1.18-3.63c-.13-.39-.68-.39-.81,0l-1.18,3.63c-1.29,3.94-4.38,7.03-8.32,8.32l-3.62,1.18c-.39.13-.39.68,0,.81l3.62,1.18c3.94,1.29,7.03,4.38,8.32,8.32l1.18,3.63c.13.39.68.39.81,0l1.18-3.63c1.29-3.94,4.38-7.03,8.32-8.32l3.62-1.18c.39-.13.39-.68,0-.81Z"/>
+        </svg>
         <span>Unchained</span>
       </a>
-      <a href="https://gemini.com/" target="_blank" title="Gemini">
+      <a href="https://bitkey.world/" target="_blank" title="Bitkey">
-        <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="360" height="360" viewBox="0 0 360 360" class="image">
+        <img class="image" src="/resources/profile/bitkey.svg" />
-          <rect style="fill: black" width="360" height="360" />
+        <span>Bitkey</span>
-          <g transform="matrix(0.62 0 0 0.62 180 180)">
-            <path style="fill: rgb(0,220,250)" transform=" translate(-162, -162)" d="M 211.74 0 C 154.74 0 106.35 43.84 100.25 100.25 C 43.84 106.35 1.4210854715202004e-14 154.76 1.4210854715202004e-14 211.74 C 0.044122601308501076 273.7212006364817 50.27879936351834 323.95587739869154 112.26 324 C 169.26 324 217.84 280.15999999999997 223.75 223.75 C 280.15999999999997 217.65 324 169.24 324 112.26 C 323.95587739869154 50.278799363518324 273.72120063648174 0.04412260130848722 211.74 -1.4210854715202004e-14 z M 297.74 124.84 C 291.9644950552469 162.621439649343 262.2969457716857 192.26062994820046 224.51 198 L 224.51 124.84 z M 26.3 199.16 C 31.986912917108594 161.30935034910615 61.653433460549415 131.56986937804106 99.48999999999998 125.78999999999999 L 99.49 199 L 26.3 199 z M 198.21 224.51 C 191.87736076583954 267.0991541201681 155.312384597087 298.62923417787493 112.255 298.62923417787493 C 69.19761540291302 298.62923417787493 32.63263923416048 267.0991541201682 26.3 224.51 z M 199.16 124.83999999999999 L 199.16 199 L 124.84 199 L 124.84 124.84 z M 297.7 99.48999999999998 L 125.78999999999999 99.48999999999998 C 132.12263923416046 56.90084587983182 168.687615402913 25.37076582212505 211.745 25.37076582212505 C 254.80238459708698 25.37076582212505 291.3673607658395 56.900845879831834 297.7 99.49 z" stroke-linecap="round" />
-          </g>
-        </svg>
-        <span>Gemini</span>
       </a>
       <a href="https://bullbitcoin.com/" target="_blank" title="Bull Bitcoin">
         <svg aria-hidden="true" class="image" viewBox="0 -5 40 40" xmlns="http://www.w3.org/2000/svg">
@@ -137,7 +147,7 @@
         <span>Bull Bitcoin</span>
       </a>
       <a href="https://exodus.com/" target="_blank" title="Exodus">
-        <svg width="80" height="80" viewBox="0 0 500 500" fill="none" xmlns="http://www.w3.org/2000/svg">
+        <svg width="80" height="80" viewBox="0 0 500 500" fill="none" xmlns="http://www.w3.org/2000/svg" class="image">
           <circle cx="250" cy="250" r="250" fill="#1F2033"/>
           <g clip-path="url(#clip0_2_14)">
             <path d="M411.042 178.303L271.79 87V138.048L361.121 196.097L350.612 229.351H271.79V271.648H350.612L361.121 304.903L271.79 362.952V414L411.042 322.989L388.271 250.646L411.042 178.303Z" fill="url(#paint0_linear_2_14)"/>
@@ -178,6 +188,19 @@
         </svg>
         <span>Exodus</span>
       </a>
+      <a href="https://gemini.com/" target="_blank" title="Gemini">
+        <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="360" height="360" viewBox="0 0 360 360" class="image">
+          <rect style="fill: black" width="360" height="360" />
+          <g transform="matrix(0.62 0 0 0.62 180 180)">
+            <path style="fill: rgb(0,220,250)" transform=" translate(-162, -162)" d="M 211.74 0 C 154.74 0 106.35 43.84 100.25 100.25 C 43.84 106.35 1.4210854715202004e-14 154.76 1.4210854715202004e-14 211.74 C 0.044122601308501076 273.7212006364817 50.27879936351834 323.95587739869154 112.26 324 C 169.26 324 217.84 280.15999999999997 223.75 223.75 C 280.15999999999997 217.65 324 169.24 324 112.26 C 323.95587739869154 50.278799363518324 273.72120063648174 0.04412260130848722 211.74 -1.4210854715202004e-14 z M 297.74 124.84 C 291.9644950552469 162.621439649343 262.2969457716857 192.26062994820046 224.51 198 L 224.51 124.84 z M 26.3 199.16 C 31.986912917108594 161.30935034910615 61.653433460549415 131.56986937804106 99.48999999999998 125.78999999999999 L 99.49 199 L 26.3 199 z M 198.21 224.51 C 191.87736076583954 267.0991541201681 155.312384597087 298.62923417787493 112.255 298.62923417787493 C 69.19761540291302 298.62923417787493 32.63263923416048 267.0991541201682 26.3 224.51 z M 199.16 124.83999999999999 L 199.16 199 L 124.84 199 L 124.84 124.84 z M 297.7 99.48999999999998 L 125.78999999999999 99.48999999999998 C 132.12263923416046 56.90084587983182 168.687615402913 25.37076582212505 211.745 25.37076582212505 C 254.80238459708698 25.37076582212505 291.3673607658395 56.900845879831834 297.7 99.49 z" stroke-linecap="round" />
+          </g>
+        </svg>
+        <span>Gemini</span>
+      </a>
+      <a href="https://leather.io/" target="_blank" title="Leather">
+        <img class="image" src="/resources/profile/leather.svg" />
+        <span>Leather</span>
+      </a>
     </div>
   </div>
 
@@ -188,8 +211,8 @@
         <div class="wrapper">
           <ng-container>
             <ng-template ngFor let-sponsor [ngForOf]="profiles.whales">
-              <a [href]="'https://twitter.com/' + sponsor.username" target="_blank" rel="sponsored" [title]="sponsor.username">
+              <a [href]="'https://x.com/' + sponsor.username" target="_blank" rel="sponsored" [title]="sponsor.username">
-                <img class="image" [src]="'/api/v1/services/account/images/' + sponsor.username + '?md5=' + sponsor.imageMd5" onError="this.src = '/resources/profile/unknown.svg'; this.className = 'image unknown'"/>
+                <img class="image" [src]="'/api/v1/services/account/images/' + sponsor.username + '/md5=' + sponsor.imageMd5" onError="this.src = '/resources/profile/grumpy.svg'; this.className = 'image unknown'"/>
               </a>
             </ng-template>
           </ng-container>
@@ -200,8 +223,8 @@
         <h3 i18n="about.sponsors.withHeart">Chad Sponsors</h3>
         <div class="wrapper">
           <ng-template ngFor let-sponsor [ngForOf]="profiles.chads">
-            <a [href]="'https://twitter.com/' + sponsor.username" target="_blank" rel="sponsored" [title]="sponsor.username">
+            <a [href]="'https://x.com/' + sponsor.username" target="_blank" rel="sponsored" [title]="sponsor.username">
-              <img class="image" [src]="'/api/v1/services/account/images/' + sponsor.username + '?md5=' + sponsor.imageMd5" onError="this.src = '/resources/profile/unknown.svg'; this.className = 'image unknown'"/>
+              <img class="image" [src]="'/api/v1/services/account/images/' + sponsor.username + '/md5=' + sponsor.imageMd5" onError="this.src = '/resources/profile/grumpy.svg'; this.className = 'image unknown'"/>
             </a>
           </ng-template>
         </div>
@@ -213,8 +236,8 @@
     <h3 i18n="about.sponsors.withHeart">OG Sponsors ❤️</h3>
     <div class="wrapper">
       <ng-container *ngIf="ogs$ | async as ogs; else loadingSponsors">
-        <a *ngFor="let ogSponsor of ogs" [href]="'https://twitter.com/' + ogSponsor.handle" target="_blank" rel="sponsored" [title]="ogSponsor.handle">
+        <a *ngFor="let ogSponsor of ogs" [href]="'https://x.com/' + ogSponsor.handle" target="_blank" rel="sponsored" [title]="ogSponsor.handle">
-          <img class="image" [src]="'/api/v1/donations/images/' + ogSponsor.handle" onError="this.src = '/resources/profile/unknown.svg'; this.className = 'image unknown'"/>
+          <img class="image" [src]="'/api/v1/donations/images/' + ogSponsor.handle" onError="this.src = '/resources/profile/grumpy.svg'; this.className = 'image unknown'"/>
         </a>
       </ng-container>
     </div>
@@ -259,22 +282,10 @@
         <img class="image" src="/resources/profile/bisq_network.png" />
         <span>Bisq</span>
       </a>
-      <a href="https://github.com/BlueWallet/BlueWallet" target="_blank" title="BlueWallet">
-        <img class="image" src="/resources/profile/bluewallet.png" />
-        <span>BlueWallet</span>
-      </a>
-      <a href="https://github.com/muun/apollo" target="_blank" title="Muun Wallet">
-        <img class="image" src="/resources/profile/muun.png" />
-        <span>Muun</span>
-      </a>
       <a href="https://github.com/spesmilo/electrum" target="_blank" title="Electrum Wallet">
         <img class="image" src="/resources/profile/electrum.png" />
         <span>Electrum</span>
       </a>
-      <a href="https://github.com/cryptoadvance/specter-desktop" target="_blank" title="Specter Wallet">
-        <img class="image" src="/resources/profile/specter.png" />
-        <span>Specter</span>
-      </a>
       <a href="https://github.com/sparrowwallet/sparrow" target="_blank" title="Sparrow Wallet">
         <img class="image" src="/resources/profile/sparrow.png" />
         <span>Sparrow</span>
@@ -283,21 +294,37 @@
         <img class="image not-rounded" src="/resources/profile/phoenix.svg" />
         <span>Phoenix</span>
       </a>
-      <a href="https://github.com/lnbits/lnbits-legend" target="_blank" title="LNbits">
+      <a href="http://github.com/COLDCARD" target="_blank" title="COLDCARD">
-        <img class="image" src="/resources/profile/lnbits.svg" />
+        <img class="image coldcard" src="/resources/profile/coldcard.png" />
-        <span>LNBits</span>
+        <span>COLDCARD</span>
       </a>
-      <a href="https://github.com/layer2tech/mercury-wallet" target="_blank" title="Mercury Wallet">
+      <a href="https://github.com/ZeusLN/zeus" target="_blank" title="ZEUS">
-        <img class="image" src="/resources/profile/mercury.svg" />
+        <img class="image" src="/resources/profile/zeus.png" />
-        <span>Mercury</span>
+        <span>ZEUS</span>
+      </a>
+      <a href="https://github.com/MutinyWallet" target="_blank" title="Mutiny">
+        <img class="image not-rounded" src="/resources/profile/mutiny.svg" />
+        <span>Mutiny</span>
       </a>
       <a href="https://github.com/hsjoberg/blixt-wallet" target="_blank" title="Blixt Wallet">
         <img class="image" src="/resources/profile/blixt.png" />
         <span>Blixt</span>
       </a>
-      <a href="https://github.com/ZeusLN/zeus" target="_blank" title="ZEUS">
+      <a href="https://github.com/nunchuk-io" target="_blank" title="Nunchuck">
-        <img class="image" src="/resources/profile/zeus.png" />
+        <img class="image" src="/resources/profile/nunchuk.svg" />
-        <span>ZEUS</span>
+        <span>Nunchuk</span>
+      </a>
+      <a href="https://github.com/BlueWallet/BlueWallet" target="_blank" title="BlueWallet">
+        <img class="image" src="/resources/profile/bluewallet.png" />
+        <span>BlueWallet</span>
+      </a>
+      <a href="https://github.com/BoltzExchange" target="_blank" title="Boltz">
+        <img class="image" src="/resources/profile/boltz.svg" />
+        <span>Boltz</span>
+      </a>
+      <a href="https://github.com/lnbits/lnbits-legend" target="_blank" title="LNbits">
+        <img class="image" src="/resources/profile/lnbits.svg" />
+        <span>LNBits</span>
       </a>
       <a href="https://github.com/vulpemventures/marina" target="_blank" title="Marina Wallet">
         <img class="image" src="/resources/profile/marina.svg" />
@@ -307,13 +334,9 @@
         <img class="image" src="/resources/profile/schildbach.svg" />
         <span>Schildbach</span>
       </a>
-      <a href="https://github.com/nunchuk-io" target="_blank" title="Nunchuck">
+      <a href="https://github.com/cryptoadvance/specter-desktop" target="_blank" title="Specter Wallet">
-        <img class="image" src="/resources/profile/nunchuk.svg" />
+        <img class="image" src="/resources/profile/specter.png" />
-        <span>Nunchuk</span>
+        <span>Specter</span>
-      </a>
-      <a href="https://github.com/bitcoin-s/bitcoin-s" target="_blank" title="bitcoin-s">
-        <img class="image" src="/resources/profile/bitcoin-s.svg" />
-        <span>bitcoin-s</span>
       </a>
       <a href="https://github.com/EdgeApp" target="_blank" title="Edge">
         <img class="image not-rounded" src="/resources/profile/edge.svg" />
@@ -323,13 +346,13 @@
         <img class="image" src="/resources/profile/galoy.svg" />
         <span>Galoy</span>
       </a>
-      <a href="https://github.com/BoltzExchange" target="_blank" title="Boltz">
+      <a href="https://github.com/muun/apollo" target="_blank" title="Muun Wallet">
-        <img class="image" src="/resources/profile/boltz.svg" />
+        <img class="image" src="/resources/profile/muun.png" />
-        <span>Boltz</span>
+        <span>Muun</span>
       </a>
-      <a href="https://github.com/MutinyWallet" target="_blank" title="Mutiny">
+      <a href="https://github.com/bitcoin-s/bitcoin-s" target="_blank" title="bitcoin-s">
-        <img class="image not-rounded" src="/resources/profile/mutiny.svg" />
+        <img class="image" src="/resources/profile/bitcoin-s.svg" />
-        <span>Mutiny</span>
+        <span>bitcoin-s</span>
       </a>
     </div>
   </div>
@@ -354,8 +377,8 @@
       <h3 i18n="about.translators">Project Translators</h3>
       <div class="wrapper">
         <ng-template ngFor let-translator [ngForOf]="translators">
-          <a [href]="'https://twitter.com/' + translator.value" target="_blank" [title]="translator.key">
+          <a [href]="'https://x.com/' + translator.value" target="_blank" [title]="translator.key">
-            <img class="image" [src]="'/api/v1/translators/images/' + translator.value" onError="this.src = '/resources/profile/unknown.svg'; this.className = 'image unknown'"/>
+            <img class="image" [src]="'/api/v1/translators/images/' + translator.value" onError="this.src = '/resources/profile/grumpy.svg'; this.className = 'image unknown'"/>
           </a>
         </ng-template>
       </div>
@@ -369,7 +392,7 @@
       <div class="wrapper">
         <ng-template ngFor let-contributor [ngForOf]="contributors.regular">
           <a [href]="'https://github.com/' + contributor.name" target="_blank" [title]="contributor.name">
-            <img class="image" [src]="'/api/v1/contributors/images/' + contributor.id" onError="this.src = '/resources/profile/unknown.svg'; this.className = 'image unknown'"/>
+            <img class="image" [src]="'/api/v1/contributors/images/' + contributor.id" onError="this.src = '/resources/profile/grumpy.svg'; this.className = 'image unknown'"/>
             <span>{{ contributor.name }}</span>
           </a>
         </ng-template>
@@ -381,7 +404,7 @@
       <div class="wrapper">
         <ng-template ngFor let-contributor [ngForOf]="contributors.core">
           <a [href]="'https://github.com/' + contributor.name" target="_blank" [title]="contributor.name" [class]="'project-member-avatar'">
-            <img class="image" [src]="'/api/v1/contributors/images/' + contributor.id" onError="this.src = '/resources/profile/unknown.svg'; this.className = 'image unknown'"/>
+            <img class="image" [src]="'/api/v1/contributors/images/' + contributor.id" onError="this.src = '/resources/profile/grumpy.svg'; this.className = 'image unknown'"/>
             <span>{{ contributor.name }}</span>
           </a>
         </ng-template>
@@ -392,11 +415,11 @@
   <div class="maintainers" id="project-maintainers">
     <h3 i18n="about.maintainers">Project Maintainers</h3>
     <div class="wrapper">
-        <a href="https://twitter.com/softsimon_" target="_blank" title="softsimon">
+        <a href="https://x.com/softsimon_" target="_blank" title="softsimon">
           <img class="image" src="/resources/profile/softsimon.jpg" />
           <span>softsimon</span>
         </a>
-        <a href="https://twitter.com/wiz" target="_blank" title="wiz">
+        <a href="https://x.com/wiz" target="_blank" title="wiz">
           <img class="image" src="/resources/profile/wiz.png" />
           <span>wiz</span>
         </a>
@@ -422,7 +445,7 @@
       Trademark Notice<br>
     </div>
     <p>
-      The Mempool Open Source Project&reg;, Mempool Accelerator&trade;, Mempool Enterprise&reg;, Mempool Liquidity&trade;, mempool.space&reg;, Be your own explorer&trade;, Explore the full Bitcoin ecosystem&reg;, Mempool Goggles&trade;, 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 either registered trademarks or trademarks of Mempool Space K.K in Japan, the United States, and/or other countries.
+      The Mempool Open Source Project&reg;, Mempool Accelerator&trade;, Mempool Enterprise&reg;, Mempool Liquidity&trade;, mempool.space&reg;, Be your own explorer&trade;, Explore the full Bitcoin ecosystem&reg;, Mempool Goggles&trade;, the mempool Logo, the mempool Square Logo, the mempool block visualization Logo, the mempool Blocks Logo, the mempool transaction Logo, the mempool Blocks 3 | 2 Logo, the mempool research Logo, the mempool.space Vertical Logo, and the mempool.space Horizontal Logo are either registered trademarks or trademarks of Mempool Space K.K in Japan, the United States, and/or other countries.
     </p>
     <p>
       While our software is available under an open source software license, the copyright license does not include an implied right or license to use our trademarks. See our <a href="https://mempool.space/trademark-policy">Trademark Policy and Guidelines</a> for more details, published on &lt;https://mempool.space/trademark-policy&gt;.

frontend/src/app/components/about/about.component.scss

@@ -10,14 +10,9 @@
     margin: 25px;
     line-height: 32px;
   }
-  .unknown {
-    border: 1px solid #b4b4b4;
-  }
 
   .image.not-rounded {
     border-radius: 0;
-    width: 60px;
-    height: 60px;
   }
 
   .intro {
@@ -159,6 +154,11 @@
         }
         img, svg {
           margin: 40px 29px 10px;
+          &.image.coldcard {
+            border-radius: 0;
+            height: auto;
+            margin: 20px 29px 20px;
+          }
         }
       }
     }
@@ -251,3 +251,12 @@
   width: 64px;
   height: 64px;
 }
+
+.enterprise-sponsor {
+  .wrapper {
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+    max-width: 800px; 
+  }
+}

frontend/src/app/components/accelerate-checkout/accelerate-checkout.component.html

@@ -1,90 +1,465 @@
-<div class="container-md card w-100" style="padding: 1em; background: var(--box-bg)" id=acceleratePreviewAnchor>
+<div class="box card w-100" style="background: var(--box-bg)" id=acceleratePreviewAnchor>
-
+  @if (accelerateError) {
-  @if (error) {
+    <div class="row mb-1 text-center">
-    <div class="mt-2">
-      <app-mempool-error [error]="error"></app-mempool-error>
-    </div>
-  } 
-
-  @else if (step === 'cta') {
-    <!-- Show A/B CTAs -->
-    <div class="row mb-1">
       <div class="col-sm">
-        <h1 style="font-size: larger;">Accelerate your Bitcoin transaction?</h1>
+        <h1 style="font-size: larger;" i18n="accelerator.sorry-error-title">Sorry, something went wrong!</h1>
+      </div>
+    </div>
+    <div class="row text-center mt-1">
+      <div class="col-sm">
+        <div class="d-flex flex-row justify-content-center align-items-center">
+          <span i18n="accelerator.error-failed-to-accelerate">We were not able to accelerate this transaction. Please try again later.</span>
+        </div>
+      </div>
+    </div>
+    <hr>
+    <div class="row mt-2 mb-2 text-center">
+      <div class="col-sm d-flex flex-column">
+        <button type="button" class="mt-1 btn btn-secondary btn-sm rounded-pill align-self-center" style="width: 200px" (click)="closeModal()" i18n="close">Close</button>
+      </div>
+    </div>
+  } @else if (step === 'quote') {
+    <div class="accelerate-cols">
+      <ng-container *ngIf="!isMobile">
+        <app-accelerate-fee-graph
+          [tx]="tx"
+          [estimate]="estimate"
+          [showEstimate]="hasAccessToBalanceMode"
+          [maxRateOptions]="maxRateOptions"
+          [maxRateIndex]="selectFeeRateIndex"
+          (setUserBid)="setUserBid($event)"
+        ></app-accelerate-fee-graph>
+      </ng-container>
+
+      <ng-container *ngIf="estimate else loadingEstimate">
+        <div>
+          @if (showDetails) {
+            <h5 i18n="accelerator.your-transaction">Your transaction</h5>
+            <div class="row">
+              <div class="col">
+                <small *ngIf="hasAncestors" class="form-text text-muted mb-2">
+                  <ng-container i18n="accelerator.plus-unconfirmed-ancestors">Plus {{ estimate.txSummary.ancestorCount - 1 }} unconfirmed ancestor(s)</ng-container>
+                </small>
+                <table class="table table-borderless table-border table-dark table-background table-accelerator">
+                  <tbody>
+                    <tr class="group-first">
+                      <td class="item" i18n="transaction.vsize|Transaction Virtual Size">Virtual size</td>
+                      <td style="text-align: end;" [innerHTML]="'&lrm;' + (estimate.txSummary.effectiveVsize | vbytes: 2)"></td>
+                    </tr>
+                    <tr class="info">
+                      <td class="info" colspan=3>
+                        <i><small i18n="accelerator.transaction-vbytes-size-description">Size in vbytes of this transaction (including unconfirmed ancestors)</small></i>
+                      </td>
+                    </tr>
+                    <tr>
+                      <td class="item" i18n="accelerator.in-band-fees">In-band fees</td>
+                      <td style="text-align: end;">
+                        {{ estimate.txSummary.effectiveFee | number : '1.0-0' }} <span class="symbol" i18n="shared.sats">sats</span>
+                      </td>
+                    </tr>
+                    <tr class="info group-last">
+                      <td class="info" colspan=3>
+                        <i><small i18n="accelerator.fees-already-paid-description">Fees already paid by this transaction (including unconfirmed ancestors)</small></i>
+                      </td>
+                    </tr>
+                  </tbody>
+                </table>
+              </div>
+            </div>
+            <br>
+          }
+          <h5 *ngIf="estimate?.pools?.length" i18n="accelerator.how-much-faster">How much faster?</h5>
+          <div class="row">
+            <div class="col">
+              <ng-container *ngIf="(etaInfo$ | async) as etaInfo; else loadingEstimate">
+                <small class="form-text checkout-text mb-2"><ng-container *ngTemplateOutlet="prioritizedBy; context: {$implicit:etaInfo.hashratePercentage}"></ng-container></small>
+                <small class="form-text checkout-text mb-2" i18n="accelerator.time-estimate-description">This will reduce your expected waiting time until the first confirmation to <strong><app-time kind="within" [time]="etaInfo.acceleratedETA" [fastRender]="false" [fixedRender]="true"></app-time></strong></small>
+              </ng-container>
+            </div>
+            <div class="col pie">
+              <app-active-acceleration-box [miningStats]="miningStats" [pools]="estimate.pools" [chartOnly]="true"></app-active-acceleration-box>
+            </div>
+          </div>
+          <div class="row">
+            <div class="col">
+              <div class="form-group">
+                <div class="fee-card">
+                  <div class="d-flex mb-0">
+                    <ng-container *ngFor="let option of maxRateOptions">
+                      <button type="button" class="btn btn-primary flex-grow-1 btn-border btn-sm feerate" [class]="{active: selectFeeRateIndex === option.index}" (click)="setUserBid(option)">
+                        <span class="fee">{{ option.fee + estimate.mempoolBaseFee + estimate.vsizeFee | number }} <span class="symbol" i18n="shared.sats">sats</span></span>
+                        <span class="rate">~<app-fee-rate [fee]="option.rate" rounding="1.0-0"></app-fee-rate></span>
+                      </button>
+                    </ng-container>
+                  </div>
+                </div>
+              </div>
+            </div>
+          </div>
+
+          <h5 i18n="accelerator.summary-title">Summary</h5>
+          <div class="row">
+            <div class="col">
+              <table class="table table-borderless table-border table-dark table-background table-accelerator">
+                <tbody>
+                  <!-- ESTIMATED FEE -->
+                  <ng-container *ngIf="showDetails">
+                    @if (hasAccessToBalanceMode) {
+                      <tr class="group-first">
+                        <td class="item" i18n="accelerator.next-block-rate">Next block market rate</td>
+                        <td class="amt" style="font-size: 16px">
+                          {{ estimate.targetFeeRate | number : '1.0-0' }}
+                        </td>
+                        <td class="units"><span class="symbol" i18n="shared.sat-vbyte|sat/vB">sat/vB</span></td>
+                      </tr>
+                      <tr class="info">
+                        <td class="info">
+                          <i><small i18n="accelerator.estimated-extra-fee-required">Estimated extra fee required</small></i>
+                        </td>
+                        <td class="amt">
+                          {{ math.max(0, estimate.nextBlockFee - estimate.txSummary.effectiveFee) | number }}
+                        </td>
+                        <td class="units">
+                          <span class="symbol" i18n="shared.sats">sats</span>
+                          <span class="fiat ml-1"><app-fiat [value]="math.max(0, estimate.nextBlockFee - estimate.txSummary.effectiveFee)"></app-fiat></span>
+                        </td>
+                      </tr>
+                    }
+                    @else {
+                      <!-- TARGET FEE -->
+                      <tr class="group-first">
+                        <td class="item" i18n="accelerator.target-rate">Target rate</td>
+                        <td class="amt" style="font-size: 16px">
+                          {{ maxRateOptions[selectFeeRateIndex].rate | number : '1.0-0' }}
+                        </td>
+                        <td class="units"><span class="symbol" i18n="shared.sat-vbyte|sat/vB">sat/vB</span></td>
+                      </tr>
+                      <tr class="info">
+                        <td class="info">
+                          <i><small i18n="accelerator.extra-fee-required">Extra fee required</small></i>
+                        </td>
+                        <td class="amt">
+                          {{ maxRateOptions[selectFeeRateIndex].fee | number }}
+                        </td>
+                        <td class="units">
+                          <span class="symbol" i18n="shared.sats">sats</span>
+                          <span class="fiat ml-1"><app-fiat [value]="maxRateOptions[selectFeeRateIndex].fee"></app-fiat></span>
+                        </td>
+                      </tr>
+                    }
+
+                    <!-- MEMPOOL BASE FEE -->
+                    <tr>
+                      <td class="item" i18n="accelerator.mempool-accelerator-fees">Mempool Accelerator™ fees</td>
+                    </tr>
+                    <tr class="info" [class.group-last]="!estimate.vsizeFee" [class.dashed-bottom]="!estimate.vsizeFee">
+                      <td class="info">
+                        <i><small i18n="accelerator.service-fee">Accelerator Service Fee</small></i>
+                      </td>
+                      <td class="amt">
+                        +{{ estimate.mempoolBaseFee | number }}
+                      </td>
+                      <td class="units">
+                        <span class="symbol" i18n="shared.sats">sats</span>
+                        <span class="fiat ml-1"><app-fiat [value]="estimate.mempoolBaseFee"></app-fiat></span>
+                      </td>
+                    </tr>
+                    <tr class="info group-last dashed-bottom" *ngIf="estimate.vsizeFee">
+                      <td class="info">
+                        <i><small i18n="accelerator.tx-size-surcharge">Transaction Size Surcharge</small></i>
+                      </td>
+                      <td class="amt">
+                        +{{ estimate.vsizeFee | number }}
+                      </td>
+                      <td class="units">
+                        <span class="symbol" i18n="shared.sats">sats</span>
+                        <span class="fiat ml-1"><app-fiat [value]="estimate.vsizeFee"></app-fiat></span>
+                      </td>
+                    </tr>
+                  </ng-container>
+
+                  <!-- NEXT BLOCK ESTIMATE -->
+                  <ng-container *ngIf="hasAccessToBalanceMode">
+                    <tr class="group-first">
+                      <td class="item">
+                        <b style="background-color: #5E35B1" class="p-1 pl-0" i18n="accelerator.estimated-cost">Estimated acceleration cost</b> ~{{ estimate.targetFeeRate | number : '1.0-0' }} sat/vB
+                      </td>
+                      <td class="amt">
+                        <span style="background-color: #5E35B1" class="p-1 pl-0">
+                          {{ estimate.cost + estimate.mempoolBaseFee + estimate.vsizeFee | number }}
+                        </span>
+                      </td>
+                      <td class="units">
+                        <span class="symbol" i18n="shared.sats">sats</span>
+                        <span class="fiat ml-1"><app-fiat [value]="estimate.cost + estimate.mempoolBaseFee + estimate.vsizeFee"></app-fiat></span>
+                      </td>
+                    </tr>
+                  </ng-container>
+
+                  <!-- MAX COST -->
+                  <ng-container>
+                    <tr class="group-first group-last">
+                      <td class="item">
+                        @if (hasAccessToBalanceMode) {
+                          <b style="background-color: var(--primary);" class="p-1 pl-0" i18n="accelerator.maximum-cost">Maximum acceleration cost</b>
+                        } @else {
+                          <b style="background-color: var(--primary);" class="p-1 pl-0" i18n="accelerator.cost">Acceleration cost</b>
+                        }
+                      </td>
+                      <td class="amt">
+                        <span style="background-color: var(--primary)" class="p-1 pl-0">
+                          {{ cost | number }}
+                        </span>
+                      </td>
+                      <td class="units">
+                        <span class="symbol" i18n="shared.sats">sats</span>
+                        <span class="fiat ml-1">
+                          <app-fiat [value]="cost" [colorClass]="hasAccessToBalanceMode && estimate.userBalance < cost ? 'red-color' : 'green-color'"></app-fiat>
+                        </span>
+                      </td>
+                    </tr>
+                  </ng-container>
+
+                  <!-- USER BALANCE -->
+                  <ng-container *ngIf="hasAccessToBalanceMode && estimate.userBalance < cost">
+                    <tr class="group-first group-last dashed-top">
+                      <td class="item" i18n="accelerator.available-balance">Available balance</td>
+                      <td class="amt">
+                        {{ estimate.userBalance | number }}
+                      </td>
+                      <td class="units">
+                        <span class="symbol" i18n="shared.sats">sats</span>
+                        <span class="fiat ml-1">
+                          <app-fiat [value]="estimate.userBalance" [colorClass]="estimate.userBalance < cost ? 'red-color' : 'green-color'"></app-fiat>
+                        </span>
+                      </td>
+                    </tr>
+                  </ng-container>
+
+                  <tr class="group-first group-last" style="border-top: 1px dashed grey">
+                    <td class="item"></td>
+                    <td colspan="2">
+                      <div class="d-flex">
+                        <ng-container *ngTemplateOutlet="accelerateButton"></ng-container>
+                      </div>
+                    </td>
+                  </tr>
+                </tbody>
+              </table>
+            </div>
+          </div>
+        </div>
+      </ng-container>
+    </div>
+
+    <hr>
+    <div class="row mt-2 mb-2 text-center">
+      <div class="col-sm d-flex flex-column">
+        <button type="button" class="mt-1 btn btn-secondary btn-sm rounded-pill align-self-center" style="width: 200px" (click)="moveToStep('summary')" i18n="go-back">Go back</button>
       </div>
     </div>
 
-    <form>
+    <ng-template #loadingEstimate>
-      <div class="row">
+      <div class="skeleton-loader"></div>
-        <div class="col-sm">
+      <br>
-          <div class="form-group form-check mb-2">
+    </ng-template>
-            <input type="radio" class="form-check-input" id="accelerate" name="accelerate" (change)="selectedOptionChanged($event)">
-            <label class="form-check-label d-flex flex-column" for="accelerate">
-              <span class="font-weight-bold">Accelerate</span>
-              <span style="color: rgb(186, 186, 186); font-size: 14px;">Confirmation expected within ~30 minutes<br>
-                @if (!calculating) {
-                  <app-fiat [value]="cost"></app-fiat>fee (<span><small style="font-family: monospace;">{{ cost | number }}</small>&nbsp;<span class="symbol" i18n="shared.sats">sats</span></span>)
-                } @else {
-                  <span class="estimating">Calculating cost...</span>
-                }
-              </span>
-            </label>
-          </div>
-        </div>
-      </div>
-      <div class="row">
-        <div class="col-sm">
-          <div class="form-group form-check mb-2">
-            <input type="radio" class="form-check-input" id="wait" name="accelerate" (change)="selectedOptionChanged($event)">
-            <label class="form-check-label d-flex flex-column" for="wait">
-              <span class="font-weight-bold">Wait</span>
-              @if (eta) {
-                <span style="color: rgb(186, 186, 186); font-size: 14px;">Confirmation expected <app-time kind="within" [time]="eta" [fastRender]="false" [fixedRender]="true"></app-time></span>
-              } @else {
-                <span style="color: rgb(186, 186, 186); font-size: 14px;">
-                  <span>Settlement expected within several hours</span>
-                </span>
-              }
-            </label>
-          </div>
-        </div>
-      </div>
-      <div class="row mt-2 mb-2" [style]="(choosenOption === 'wait' || calculating) ? 'opacity: 0.25; pointer-events: none' : ''">
-        <div class="col-sm d-flex flex-row justify-content-center">
-          <button type="button" class="mt-1 btn btn-purple rounded-pill align-self-center d-flex flex-row justify-content-center align-items-center" style="width: 200px" (click)="enableCheckoutPage()">
-            <img src="/resources/mempool-accelerator-sparkles-light.svg" height="20" class="mr-2" style="margin-left: -10px">
-            <span>Accelerate</span>
-          </button>
-        </div>
-      </div>
-    </form>
   }
-    
+  @else if (step === 'summary') {
-  @else if (step === 'checkout') {
+    <ng-container *ngIf="estimate && (etaInfo$ | async) as etaInfo; else loadingSummary">
+      <!-- Show A/B CTAs -->
+      @if (!noCTA) {
+        <div class="row mb-1">
+          <div class="col-sm">
+            <h1 style="font-size: larger;"><ng-content select="[slot='cta-title']"></ng-content><span class="default-slot" i18n="accelerator.accelerate-your-transaction">Accelerate your Bitcoin transaction?</span></h1>
+          </div>
+        </div>
+      }
+
+      @if (!advancedEnabled) {
+        <form>
+          <div class="row">
+            <div class="col-md">
+              <div class="form-group form-check mb-2">
+                <input type="radio" [checked]="selectedOption === 'wait'"  class="form-check-input" id="wait" name="accel" (change)="selectedOptionChanged($event)">
+                <label class="form-check-label d-flex flex-column" for="wait">
+                  <span class="font-weight-bold" i18n="accelerator.wait">Wait</span>
+                  @if (eta.blocks < 7) {
+                    <span class="checkout-text"><ng-container i18n="accelerator.confirmation-expected">Confirmation expected</ng-container>&nbsp;<app-time kind="within" [time]="eta.time" [fastRender]="false" [fixedRender]="true"></app-time></span>
+                  } @else {
+                    <span class="checkout-text">
+                      <span i18n="accelerator.confirmation-not-expected-soon">Confirmation not expected any time soon</span>
+                    </span>
+                  }
+                </label>
+              </div>
+              <div class="form-group form-check mb-2">
+                <input type="radio" [checked]="selectedOption === 'accel'"  class="form-check-input" id="accel" name="accel" (change)="selectedOptionChanged($event)">
+                <label class="form-check-label d-flex flex-column" for="accel">
+                  <ng-container *ngTemplateOutlet="accelerateOption; context: {etaInfo}"></ng-container>
+                </label>
+              </div>
+            </div>
+          </div>
+          <div class="row mt-2 mb-2">
+            <div class="col-sm d-flex flex-row justify-content-center">
+              <ng-container *ngTemplateOutlet="accelerateButton"></ng-container>
+            </div>
+          </div>
+        </form>
+      } @else {
+        <div>
+          <div class="row summary-row">
+            <div>
+              <div class="mb-2">
+                <div class="d-flex flex-column" for="accel">
+                  <ng-container *ngTemplateOutlet="accelerateOption; context: {etaInfo}"></ng-container>
+                </div>
+              </div>
+            </div>
+            <div class="pie d-none d-lg-flex">
+              <small class="form-text checkout-text mb-2"><ng-container *ngTemplateOutlet="prioritizedBy; context: {$implicit:etaInfo.hashratePercentage}"></ng-container></small>
+              <app-active-acceleration-box [miningStats]="miningStats" [pools]="estimate.pools" [chartOnly]="true" class="ml-2"></app-active-acceleration-box>
+            </div>
+            <ng-container *ngTemplateOutlet="accelerateButton"></ng-container>
+          </div>
+        </div>
+      }
+    </ng-container>
+    <ng-template #loadingSummary>
+      <div class="row">
+        <div class="col-md">
+          <div class="d-flex flex-row justify-content-center align-items-center">
+            <div class="m-4 spinner-border text-light" style="width: 25px; height: 25px"></div>
+          </div>
+        </div>
+      </div>
+    </ng-template>
+  } @else if (step === 'checkout') {
+    <ng-container *ngIf="estimate && (etaInfo$ | async) as etaInfo; else loadingCheckout">
+      <div class="row">
+        <div class="col-md">
+          <div class="d-flex flex-column">
+            <span><ng-container *ngTemplateOutlet="accelerateTo; context: {$implicit:(userBid + estimate.txSummary.effectiveFee) / estimate.txSummary.effectiveVsize}"></ng-container></span>
+            <span class="checkout-text">
+              @if (!calculating) {
+                <ng-container i18n="accelerator.for-an-additional-cost">For an additional</ng-container> <app-fiat [value]="cost"></app-fiat> (<span><small style="font-family: monospace;">{{ cost | number }}</small>&nbsp;<span class="symbol" i18n="shared.sats">sats</span></span>)
+              } @else {
+                <span class="estimating">Calculating cost...</span>
+              }
+            </span>
+            <span class="checkout-text" *ngIf="(etaInfo$ | async) as etaInfo">
+              <ng-container i18n="accelerator.reducing-expected-confirmation-time">Reducing expected confirmation time to <app-time kind="within" [time]="etaInfo.acceleratedETA" [fastRender]="false" [fixedRender]="true"></app-time></ng-container>
+            </span>
+          </div>
+        </div>
+        <div class="col-md pie d-none d-md-flex" *ngIf="!forceMobile">
+          <small class="form-text checkout-text mb-2" *ngIf="(etaInfo$ | async) as etaInfo"><ng-container *ngTemplateOutlet="prioritizedBy; context: {$implicit:etaInfo.hashratePercentage}"></ng-container></small>
+          <app-active-acceleration-box [miningStats]="miningStats" [pools]="estimate.pools" [chartOnly]="true" class="ml-2"></app-active-acceleration-box>
+        </div>
+      </div>
+      <div class="payment-area mt-2 p-2" style="font-size: 14px;">
+        <div class="row text-center justify-content-center mx-2">
+          <p i18n="accelerator.payment-to-mempool-space">Payment to mempool.space for acceleration of txid <a [routerLink]="'/tx/' + tx.txid" target="_blank">{{ tx.txid.substr(0, 10) }}..{{ tx.txid.substr(-10) }}</a></p>
+        </div>
+        @if (canPayWithBalance || !(canPayWithBitcoin || canPayWithCashapp)) {
+          <div class="row">
+            <div class="col-sm text-center d-flex flex-column justify-content-center align-items-center">
+              <p><ng-container i18n="accelerator.your-account-will-be-debited">Your account will be debited no more than</ng-container>&nbsp;<small style="font-family: monospace;">{{ cost | number }}</small>&nbsp;<span class="symbol" i18n="shared.sats">sats</span></p>
+              <div class="d-flex justify-content-center" [class.grayOut]="!canPayWithBalance || quoteError || accelerateError || showSuccess">
+                <ng-container *ngTemplateOutlet="accountPayButton"></ng-container>
+              </div>
+            </div>
+          </div>
+        } @else {
+          <div class="row">
+            @if (canPayWithBitcoin) {
+              <div class="col-sm text-center d-flex flex-column justify-content-center align-items-center">
+                @if (invoice) {
+                  <p><ng-container i18n="transaction.pay|Pay button label">Pay</ng-container>&nbsp;<span><small style="font-family: monospace;">{{ ((invoice.btcDue * 100_000_000) || cost) | number }}</small>&nbsp;<span class="symbol" i18n="shared.sats">sats</span></span></p>
+                  <app-bitcoin-invoice style="width: 100%;" [invoice]="invoice" [minimal]="true" (completed)="bitcoinPaymentCompleted()"></app-bitcoin-invoice>
+                } @else if (btcpayInvoiceFailed) {
+                  <p i18n="accelerator.failed-to-load-invoice">Failed to load invoice</p>
+                  <div class="d-flex flex-column align-items-center justify-content-center" style="width: 100%; height: 292px;">
+                    <fa-icon style="font-size: 24px; color: var(--red)" [icon]="['fas', 'circle-xmark']"></fa-icon>
+                  </div>
+                } @else {
+                  <p i18n="accelerator.loading-invoice">Loading invoice...</p>
+                  <div class="d-flex align-items-center justify-content-center" style="width: 100%; height: 292px;">
+                    <div class="m-4 spinner-border text-light" style="width: 25px; height: 25px"></div>
+                  </div>
+                }
+              </div>
+              @if (canPayWithCashapp || canPayWithApplePay || canPayWithGooglePay) {
+                <div class="col-sm text-center flex-grow-0  d-flex flex-column justify-content-center align-items-center">
+                  <p class="text-nowrap">&mdash;<span i18n="or">OR</span>&mdash;</p>
+                </div>
+              }
+            }
+            @if (canPayWithCashapp || canPayWithApplePay || canPayWithGooglePay) {
+              <div class="col-sm text-center d-flex flex-column justify-content-center align-items-center">
+                <p><ng-container i18n="transaction.pay|Pay button label">Pay</ng-container>&nbsp;<app-fiat [value]="cost"></app-fiat> with</p>
+                @if (canPayWithCashapp) {
+                  <img class="paymentMethod mx-2" style="width: 200px" src="/resources/cash-app.svg" height=55 (click)="moveToStep('cashapp')">
+                }
+                @if (canPayWithApplePay) {
+                  @if (canPayWithCashapp) { <span class="mt-1 mb-1"></span> }
+                  <div class="paymentMethod mx-2" style="width: 200px; height: 55px" (click)="moveToStep('applepay')">
+                    <img src="/resources/apple-pay.png" height=37>
+                  </div>
+                }
+                @if (canPayWithGooglePay) {
+                  @if (canPayWithCashapp || canPayWithApplePay) { <span class="mt-1 mb-1"></span> }
+                  <div class="paymentMethod mx-2" style="width: 200px; height: 55px" (click)="moveToStep('googlepay')">
+                    <img src="/resources/google-pay.png" height=37>
+                  </div>
+                }
+              </div>
+            }
+          </div>
+        }
+      </div>
+    </ng-container>
+    <ng-template #loadingCheckout>
+      <div class="row">
+        <div class="col-md">
+          <div class="d-flex flex-row justify-content-center align-items-center">
+            <div class="m-4 spinner-border text-light" style="width: 25px; height: 25px"></div>
+          </div>
+        </div>
+      </div>
+    </ng-template>
+
+    <hr>
+    <div class="row mt-2 mb-2 text-center">
+      <div class="col-sm d-flex flex-column">
+        <button type="button" class="mt-1 btn btn-secondary btn-sm rounded-pill align-self-center" style="width: 200px" (click)="moveToStep('summary')" i18n="go-back">Go back</button>
+      </div>
+    </div>
+  } @else if (step === 'cashapp' || step === 'applepay' || step === 'googlepay') {
     <!-- Show checkout page -->
-    <div class="row mb-md-1 text-center">
+    <div class="row mb-md-1 text-center" id="confirm-title">
-      <div class="col-sm">
+      <div class="col-sm" id="confirm-payment-title">
-        <h1 style="font-size: larger;">Confirm your payment</h1>
+        <h1 style="font-size: larger;"><ng-content select="[slot='checkout-title']"></ng-content><span class="default-slot" i18n="accelerator.confirm-your-payment">Confirm your payment</span></h1>
       </div>
     </div>
 
     <div class="row text-center">
       <div class="col-sm">
         <div class="form-group w-100" style="font-size: 14px">
-          Payment to mempool.space for acceleration of txid <a [routerLink]="'/tx/' + txid" target="_blank">{{ txid.substr(0, 10) }}..{{ txid.substr(-10) }}</a>
+          <ng-container i18n="accelerator.payment-to-mempool-space">Payment to mempool.space for acceleration of txid <a [routerLink]="'/tx/' + tx.txid" target="_blank">{{ tx.txid.substr(0, 10) }}..{{ tx.txid.substr(-10) }}</a></ng-container>
         </div>
       </div>
     </div>
 
-    @if (!loadingCashapp) {
+    @if (step === 'cashapp' && !loadingCashapp || step === 'applepay' && !loadingApplePay || step === 'googlepay' && !loadingGooglePay) {
       <div class="row text-center mt-1">
         <div class="col-sm">
           <div class="form-group w-100">
-            <span><u><strong>Total additional cost</strong></u><br>
+            <span><u><strong i18n="accelerator.total-additional-cost">Total additional cost</strong></u><br>
               <span style="font-size: 16px" class="d-block mt-2">
-                Pay
+                <ng-container i18n="transaction.pay|Pay button label">Pay</ng-container>
                 <strong><app-fiat [value]="cost"></app-fiat></strong>
-                with
+                <ng-container i18n="accelerator.pay-with">with</ng-container>
               </span>
             </span>
           </div>
@@ -95,10 +470,16 @@
     <div class="row text-center mt-1">
       <div class="col-sm">
         <div class="form-group w-100">
-          <div id="cash-app-pay" class="d-inline-block" [style]="loadingCashapp ? 'opacity: 0; width: 0px; height: 0px; pointer-events: none;' : ''"></div>
+          @if (step === 'applepay') {
-          @if (loadingCashapp) {
+            <div id="apple-pay-button" class="apple-pay-button apple-pay-button-black" style="height: 50px"  [style]="loadingApplePay ? 'opacity: 0; width: 0px; height: 0px; pointer-events: none;' : ''"></div>
+          } @else if (step === 'cashapp') {          
+            <div id="cash-app-pay" class="d-inline-block" style="height: 50px" [style]="loadingCashapp ? 'opacity: 0; width: 0px; height: 0px; pointer-events: none;' : ''"></div>
+          } @else if (step === 'googlepay') {
+            <div id="google-pay-button" class="d-inline-block" style="height: 50px" [style]="loadingGooglePay ? 'opacity: 0; width: 0px; height: 0px; pointer-events: none;' : ''"></div>
+          }
+          @if (loadingCashapp || loadingApplePay || loadingGooglePay) {
           <div display="d-flex flex-row justify-content-center">
-            <span>Loading payment method...</span>
+            <span i18n="accelerator.loading-payment-method">Loading payment method...</span>
             <div class="ml-2 spinner-border text-light" style="width: 25px; height: 25px"></div>
           </div>
           }
@@ -109,16 +490,14 @@
     <hr>
     <div class="row mt-2 mb-2 text-center">
       <div class="col-sm d-flex flex-column">
-        <small>Changed your mind?</small>
+        <button type="button" class="mt-1 btn btn-secondary btn-sm rounded-pill align-self-center" style="width: 200px" (click)="moveToStep('checkout')" i18n="go-back">Go back</button>
-        <button type="button" class="mt-1 btn btn-secondary btn-sm rounded-pill align-self-center" style="width: 200px" (click)="step = 'cta'">Go Back</button>
       </div>
     </div>
   }
-
   @else if (step === 'processing') {
     <div class="row mb-1 text-center">
       <div class="col-sm">
-        <h1 style="font-size: larger;">Confirm your payment</h1>
+        <h1 style="font-size: larger;"><ng-content select="[slot='processing-title']"></ng-content><span class="default-slot" i18n="accelerator.confirming-your-payment">Confirming your payment</span></h1>
       </div>
     </div>
 
@@ -128,12 +507,94 @@
           <!-- Processing payment -->
           <div id="cash-app-pay" class="d-inline-block" [style]="'opacity: 0; width: 0px; height: 0px; pointer-events: none;'"></div>
           <div display="d-flex flex-row justify-content-center">
-            <span>We are processing your payment...</span>
+            <span i18n="accelerator.payment-processing">We are processing your payment...</span>
             <div class="ml-2 spinner-border text-light" style="width: 25px; height: 25px"></div>
           </div>
         </div>
       </div>
     </div>
   }
-  
+  @else if (step === 'paid') {
+    <div class="row mb-1 text-center">
+      <div class="col-sm">
+        <h1 style="font-size: larger;"><ng-content select="[slot='accelerating-title']"></ng-content><span class="default-slot" i18n="accelerator.accelerating-your-transaction">Accelerating your transaction</span></h1>
+      </div>
+    </div>
+
+    <div class="row text-center mt-1">
+      <div class="col-sm">
+        <div class="d-flex flex-row flex-column justify-content-center align-items-center">
+          <span i18n="accelerator.confirming-acceleration-with-miners">Confirming your acceleration with our mining pool partners...</span>
+          @if (timeSincePaid > 30000) {
+            <span i18n="accelerator.confirming-acceleration-with-miners">...sorry, this is taking longer than expected...</span>
+          }
+          <div class="m-2 spinner-border text-light" style="width: 25px; height: 25px"></div>
+        </div>
+      </div>
+    </div>
+  } @else if (step === 'success') {
+    <div class="row mb-1 text-center">
+      <div class="col-sm">
+        <h1 style="font-size: larger;"><ng-content select="[slot='accelerated-title']"></ng-content><span class="default-slot" i18n="accelerator.success-message">Your transaction is being accelerated!</span></h1>
+      </div>
+    </div>
+    <div class="row text-center mt-1">
+      <div class="col-sm">
+        <div class="d-flex flex-row justify-content-center align-items-center">
+          <span i18n="accelerator.confirmed-acceleration-with-miners">Your transaction has been accepted for acceleration by our mining pool partners.</span>
+        </div>
+      </div>
+    </div>
+    <hr>
+    <div class="row mt-2 mb-2 text-center">
+      <div class="col-sm d-flex flex-column">
+        <button type="button" class="mt-1 btn btn-secondary btn-sm rounded-pill align-self-center" style="width: 200px" (click)="closeModal()" i18n="close">Close</button>
+      </div>
+    </div>
+  }
 </div>
+
+<ng-template #accelerateOption let-etaInfo="etaInfo">
+  <span><ng-container *ngTemplateOutlet="accelerateTo; context: {$implicit:(userBid + estimate.txSummary.effectiveFee) / estimate.txSummary.effectiveVsize}"></ng-container> <ng-container *ngTemplateOutlet="customizeButton"></ng-container></span>
+  <span class="checkout-text"><ng-container i18n="accelerator.confirmation-expected">Confirmation expected</ng-container>&nbsp;<app-time kind="within" [time]="etaInfo.acceleratedETA" [fastRender]="false" [fixedRender]="true"></app-time><br>
+    @if (!calculating) {
+      <app-fiat [value]="cost"></app-fiat> (<span><small style="font-family: monospace;">{{ cost | number }}</small>&nbsp;<span class="symbol" i18n="shared.sats">sats</span></span>)
+    } @else {
+      <span class="estimating" i18n="accelerator.calculating-cost">Calculating cost...</span>
+    }
+  </span>
+</ng-template>
+
+<ng-template #customizeButton>
+  <button type="button" *ngIf="advancedEnabled" class="btn btn-sm btn-outline-info btn-small-height ml-2" (click)="moveToStep('quote')" i18n="accelerator.customize">customize</button>
+</ng-template>
+
+<ng-template id="accelerate-to" #accelerateTo let-x i18n="accelerator.accelerate-to-x">Accelerate to ~{{ x | number : '1.0-0' }} sat/vB</ng-template>
+
+<ng-template #accelerateButton>
+  <div class="position-relative">
+    <button type="button" class="mt-1 btn btn-purple rounded-pill align-self-center d-flex flex-row justify-content-center align-items-center" [class.disabled]="!canPay || quoteError || cantPayReason || calculating || (!advancedEnabled && selectedOption !== 'accel')" style="width: 200px" (click)="moveToStep('checkout')">
+      <img src="/resources/mempool-accelerator-sparkles-light.svg" height="20" class="mr-2" style="margin-left: -10px">
+      <span i18n="transaction.accelerate|Accelerate button label">Accelerate</span>
+    </button>
+    @if (quoteError || cantPayReason) {
+      <div class="btn-error-wrapper"><span class="btn-error"><app-mempool-error [error]="quoteError || cantPayReason" [textOnly]="true" alertClass=""></app-mempool-error></span></div>
+    }
+  </div>
+</ng-template>
+
+<ng-template #accountPayButton>
+  @if (hasAccessToBalanceMode) {
+    <button type="button" class="mt-1 btn btn-purple rounded-pill align-self-center d-flex flex-row justify-content-center align-items-center" [class.disabled]="!canPay || calculating" style="width: 200px" (click)="accelerateWithMempoolAccount()">
+      <img src="/resources/mempool-accelerator-sparkles-light.svg" height="20" class="mr-2" style="margin-left: -10px">
+      <span i18n="transaction.pay|Pay button label">Pay</span>
+    </button>
+  } @else {
+    <button type="button" class="mt-1 btn btn-purple rounded-pill align-self-center d-flex flex-row justify-content-center align-items-center disabled" style="width: 200px">
+      <img src="/resources/mempool-accelerator-sparkles-light.svg" height="20" class="mr-2" style="margin-left: -10px">
+      <span>Coming soon</span>
+    </button>
+  }
+</ng-template>
+
+<ng-template #prioritizedBy let-i i18n="accelerator.hashrate-percentage-description">Your transaction will be prioritized by up to <strong>{{ i | number : '1.1-1' }}%</strong> of miners.</ng-template>

frontend/src/app/components/accelerate-checkout/accelerate-checkout.component.scss

@@ -7,3 +7,213 @@
 .estimating {
   color: var(--green)
 }
+
+.paymentMethod {
+  padding: 10px;
+  background-color: var(--secondary);
+  border-radius: 10px;
+  cursor: pointer;
+}
+
+.default-slot:not(:only-child) {
+  display: none;
+}
+
+.pie {
+  display: flex;
+  align-items: center;
+  max-width: 330px;
+}
+
+.fee-card {
+  padding: 15px;
+  background-color: var(--bg);
+
+  .feerate {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+
+    .rate {
+      font-size: 0.9em;
+      .symbol {
+        color: white;
+      }
+    }
+  }
+}
+
+.btn-border {
+  border: solid 1px black;
+  background-color: #0c4a87;
+}
+
+.feerate.active {
+  background-color: var(--primary) !important;
+  opacity: 1;
+  border: 1px solid #007fff !important;
+}
+.feerate:focus {
+  box-shadow: none !important;
+}
+
+.grayOut {
+  opacity: 0.5;
+}
+
+.disabled {
+  opacity: 0.5;
+  pointer-events: none;
+}
+
+.table-toggle {
+  width: 100%;
+  margin-top: 0.5em;
+}
+
+.tab {
+  &:first-child {
+    margin-right: 1px;
+  }
+  border: solid 1px black;
+  border-bottom: none;
+  background-color: #323655;
+  border-top-left-radius: 10px !important;
+  border-top-right-radius: 10px !important;
+}
+.tab.active {
+  background-color: #5d659d !important;
+  opacity: 1;
+}
+.tab:focus {
+  box-shadow: none !important;
+}
+
+.table-accelerator {
+  tr {
+    td {
+      padding-top: 0;
+      padding-bottom: 0;
+      vertical-align: baseline;
+    }
+
+    &.group-first {
+      td {
+        padding-top: 0.75rem;
+      }
+    }
+    &.group-last, &:last-child {
+      td {
+        padding-bottom: 0.75rem;
+      }
+    }
+    &.dashed-top {
+      border-top: 1px dashed grey;
+    }
+    &.dashed-bottom {
+      border-bottom: 1px dashed grey
+    }
+  }
+  td {
+    &:first-child {
+      width: 100vw;
+    }
+    &.info {
+      color: #6c757d;
+      white-space: initial;
+    }
+    &.amt {
+      text-align: right;
+      padding-right: 0.2em;
+    }
+    &.units {
+      padding-left: 0.2em;
+      white-space: nowrap;
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+    }
+  }
+}
+
+.accelerate-cols {
+  display: flex;
+  flex-direction: row;
+  align-items: stretch;
+  margin-top: 1em;
+}
+
+.payment-area {
+  background: var(--bg);
+}
+
+.col.pie {
+  flex-grow: 0;
+  padding: 0 1em;
+  position: relative;
+  top: -15px;
+}
+
+.item {
+  white-space: initial;
+}
+
+.table-background {
+  background-color: var(--bg);
+}
+
+.checkout-text {
+  color: rgb(186, 186, 186);
+  font-size: 14px;
+}
+
+.btn-accelerate {
+  background-color: var(--tertiary);
+}
+
+.btn-small-height {
+	line-height: 1;
+}
+
+.summary-row {
+  display: flex;
+  flex-direction: row;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0 2em;
+  flex-wrap: wrap;
+
+  @media (max-width: 640px) {
+    flex-direction: column;
+  }
+}
+
+.btn-error {
+  position: absolute;
+  right: 0;
+  font-size: 12px;
+  color: var(--red);
+  text-align: center;
+  width: 200px;
+  white-space: normal;
+}
+
+.btn-error-wrapper {
+  height: 26px;
+}
+
+.apple-pay-button {
+    display: inline-block;
+    -webkit-appearance: -apple-pay-button;
+    -apple-pay-button-type: plain; /* Use any supported button type. */
+}
+.apple-pay-button-black {
+    -apple-pay-button-style: black;
+}
+.apple-pay-button-white {
+    -apple-pay-button-style: white;
+}
+.apple-pay-button-white-with-line {
+    -apple-pay-button-style: white-outline;
+}

frontend/src/app/components/accelerate-checkout/accelerate-checkout.component.ts

@@ -1,9 +1,55 @@
-import { Component, OnInit, OnDestroy, Output, EventEmitter, Input, ChangeDetectorRef, SimpleChanges } from '@angular/core';
+/* eslint-disable no-console */
-import { Subscription, tap, of, catchError } from 'rxjs';
+import { Component, OnInit, OnDestroy, Output, EventEmitter, Input, ChangeDetectorRef, SimpleChanges, HostListener } from '@angular/core';
+import { Subscription, tap, of, catchError, Observable, switchMap } from 'rxjs';
 import { ServicesApiServices } from '../../services/services-api.service';
-import { nextRoundNumber } from '../../shared/common.utils';
+import { md5, insecureRandomUUID } from '../../shared/common.utils';
 import { StateService } from '../../services/state.service';
 import { AudioService } from '../../services/audio.service';
+import { ETA, EtaService } from '../../services/eta.service';
+import { Transaction } from '../../interfaces/electrs.interface';
+import { MiningStats } from '../../services/mining.service';
+import { IAuth, AuthServiceMempool } from '../../services/auth.service';
+import { EnterpriseService } from '../../services/enterprise.service';
+import { ApiService } from '../../services/api.service';
+import { isDevMode } from '@angular/core';
+
+export type PaymentMethod = 'balance' | 'bitcoin' | 'cashapp' | 'applePay' | 'googlePay';
+
+export type AccelerationEstimate = {
+  hasAccess: boolean;
+  txSummary: TxSummary;
+  nextBlockFee: number;
+  targetFeeRate: number;
+  userBalance: number;
+  enoughBalance: boolean;
+  cost: number;
+  mempoolBaseFee: number;
+  vsizeFee: number;
+  pools: number[];
+  availablePaymentMethods: Record<PaymentMethod, {min: number, max: number}>;
+  unavailable?: boolean;
+  options: { // recommended bid options
+    fee: number; // recommended userBid in sats
+  }[];
+}
+export type 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 RateOption {
+  fee: number;
+  rate: number;
+  index: number;
+}
+
+export const MIN_BID_RATIO = 1;
+export const DEFAULT_BID_RATIO = 2;
+export const MAX_BID_RATIO = 4;
+
+type CheckoutStep = 'quote' | 'summary' | 'checkout' | 'cashapp' | 'applepay' | 'googlepay' | 'processing' | 'paid' | 'success';
 
 @Component({
   selector: 'app-accelerate-checkout',
@@ -11,80 +57,209 @@ import { AudioService } from '../../services/audio.service';
   styleUrls: ['./accelerate-checkout.component.scss']
 })
 export class AccelerateCheckout implements OnInit, OnDestroy {
-  @Input() eta: number | null = null;
+  @Input() tx: Transaction;
-  @Input() txid: string = '70c18d76cdb285a1b5bd87fdaae165880afa189809c30b4083ff7c0e69ee09ad';
+  @Input() accelerating: boolean = false;
+  @Input() miningStats: MiningStats;
+  @Input() eta: ETA;
   @Input() scrollEvent: boolean;
-  @Output() close = new EventEmitter<null>();
+  @Input() cashappEnabled: boolean = true;
+  @Input() applePayEnabled: boolean = false;
+  @Input() googlePayEnabled: boolean = true;
+  @Input() advancedEnabled: boolean = false;
+  @Input() forceMobile: boolean = false;
+  @Input() showDetails: boolean = false;
+  @Input() noCTA: boolean = false;
+  @Output() unavailable = new EventEmitter<boolean>();
+  @Output() completed = new EventEmitter<boolean>();
+  @Output() hasDetails = new EventEmitter<boolean>();
+  @Output() changeMode = new EventEmitter<boolean>();
 
   calculating = true;
-  choosenOption: 'wait' | 'accelerate' = 'wait';
+  processing = false;
-  error = '';
+  selectedOption: 'wait' | 'accel';
+  cantPayReason = '';
+  quoteError = ''; // error fetching estimate or initial data
+  accelerateError = ''; // error executing acceleration
+  btcpayInvoiceFailed = false;
+  timePaid: number = 0; // time acceleration requested
+  math = Math;
+  isMobile: boolean = window.innerWidth <= 767.98;
+  isProdDomain = ['mempool.space',
+    'mempool-staging.va1.mempool.space',
+    'mempool-staging.fmt.mempool.space',
+    'mempool-staging.fra.mempool.space',
+    'mempool-staging.tk7.mempool.space',
+    'mempool-staging.sg1.mempool.space'
+   ].indexOf(document.location.hostname) > -1;
+
+  private _step: CheckoutStep = 'summary';
+  simpleMode: boolean = true;
+  timeoutTimer: any;
+
+  authSubscription$: Subscription;
+  auth: IAuth | null = null;
 
   // accelerator stuff
-  square: { appId: string, locationId: string};
   accelerationUUID: string;
+  accelerationSubscription: Subscription;
+  difficultySubscription: Subscription;
   estimateSubscription: Subscription;
+  estimate: AccelerationEstimate;
   maxBidBoost: number; // sats
   cost: number; // sats
+  etaInfo$: Observable<{ hashratePercentage: number, ETA: number, acceleratedETA: number }>;
+  showSuccess = false;
+  hasAncestors: boolean = false;
+  minExtraCost = 0;
+  minBidAllowed = 0;
+  maxBidAllowed = 0;
+  defaultBid = 0;
+  userBid = 0;
+  selectFeeRateIndex = 1;
+  maxRateOptions: RateOption[] = [];
 
   // square
   loadingCashapp = false;
-  cashappSubmit: any;
+  loadingApplePay = false;
+  loadingGooglePay = false;
   payments: any;
   cashAppPay: any;
-  cashAppSubscription: Subscription;
+  applePay: any;
+  googlePay: any;
   conversionsSubscription: Subscription;
-  step: 'cta' | 'checkout' | 'processing' = 'cta';
+  conversions: Record<string, number>;
+
+  // btcpay
+  loadingBtcpayInvoice = false;
+  invoice = undefined;
 
   constructor(
+    public stateService: StateService,
+    private apiService: ApiService,
     private servicesApiService: ServicesApiServices,
-    private stateService: StateService,
+    private etaService: EtaService,
     private audioService: AudioService,
-    private cd: ChangeDetectorRef
+    private cd: ChangeDetectorRef,
+    private authService: AuthServiceMempool,
+    private enterpriseService: EnterpriseService,
   ) {
-    this.accelerationUUID = window.crypto.randomUUID();
+    this.accelerationUUID = insecureRandomUUID();
+
+    // Check if Apple Pay available
+    // https://developer.apple.com/documentation/apple_pay_on_the_web/apple_pay_js_api/checking_for_apple_pay_availability#overview
+    if (window['ApplePaySession']) {
+      this.applePayEnabled = true;
+    }
   }
 
-  ngOnInit() {
+  ngOnInit(): void {
-    const urlParams = new URLSearchParams(window.location.search);
+    this.authSubscription$ = this.authService.getAuth$().subscribe((auth) => {
-    if (urlParams.get('cash_request_id')) { // Redirected from cashapp
+      if (this.auth?.user?.userId !== auth?.user?.userId) {
-      this.insertSquare();
+        this.auth = auth;
-      this.setupSquare();
+        this.estimate = null;
-      this.step = 'processing';
+        this.quoteError = null;
-    }
+        this.accelerateError = null;
-
+        this.timePaid = 0;
-    this.servicesApiService.setupSquare$().subscribe(ids => {
+        this.btcpayInvoiceFailed = false;
-      this.square = {
+        this.moveToStep('summary');
-        appId: ids.squareAppId,
+      } else {
-        locationId: ids.squareLocationId
+        this.auth = auth;
-      };
-      if (this.step === 'cta') {
-        this.estimate();
       }
     });
+    this.authService.refreshAuth$().subscribe();
+
+    const urlParams = new URLSearchParams(window.location.search);
+    if (urlParams.get('cash_request_id')) { // Redirected from cashapp
+      this.moveToStep('processing');
+      this.insertSquare();
+      this.setupSquare();
+    } else {
+      this.moveToStep('summary');
+    }
+
+    this.conversionsSubscription = this.stateService.conversions$.subscribe(
+      async (conversions) => {
+        this.conversions = conversions;
+      }
+    );
   }
 
-  ngOnDestroy() {
+  ngOnDestroy(): void {
     if (this.estimateSubscription) {
       this.estimateSubscription.unsubscribe();
     }
+    if (this.authSubscription$) {
+      this.authSubscription$.unsubscribe();
+    }
   }
 
   ngOnChanges(changes: SimpleChanges): void {
-    if (changes.scrollEvent) {
+    if (changes.scrollEvent && this.scrollEvent) {
-      this.scrollToPreview('acceleratePreviewAnchor', 'start');
+      this.scrollToElement('acceleratePreviewAnchor', 'start');
+    }
+    if (changes.accelerating && this.accelerating) {
+      if (this.step === 'processing' || this.step === 'paid') {
+        this.moveToStep('success');
+      } else { // Edge case where the transaction gets accelerated by someone else or on another session
+        this.closeModal();
+      }
     }
   }
 
-  /**
+  moveToStep(step: CheckoutStep): void {
-  * Scroll to element id with or without setTimeout
+    this._step = step;
-  */
+    if (this.timeoutTimer) {
-  scrollToPreviewWithTimeout(id: string, position: ScrollLogicalPosition) {
+      clearTimeout(this.timeoutTimer);
-    setTimeout(() => {
+    }
-      this.scrollToPreview(id, position);
+    if (!this.estimate && ['quote', 'summary', 'checkout'].includes(this.step)) {
-    }, 1000);
+      this.fetchEstimate();
+    }
+    if (this._step === 'checkout') {
+      this.insertSquare();
+      this.enterpriseService.goal(8);
+    }
+    if (this._step === 'checkout' && this.canPayWithBitcoin) {
+      this.btcpayInvoiceFailed = false;
+      this.loadingBtcpayInvoice = true;
+      this.invoice = null;
+      this.requestBTCPayInvoice();
+    } else if (this._step === 'cashapp' && this.cashappEnabled) {
+      this.loadingCashapp = true;
+      this.setupSquare();
+      this.scrollToElementWithTimeout('confirm-title', 'center', 100);
+    } else if (this._step === 'applepay' && this.applePayEnabled) {
+      this.loadingApplePay = true;
+      this.setupSquare();
+      this.scrollToElementWithTimeout('confirm-title', 'center', 100);
+    } else if (this._step === 'googlepay' && this.googlePayEnabled) {
+      this.loadingGooglePay = true;
+      this.setupSquare();
+      this.scrollToElementWithTimeout('confirm-title', 'center', 100);
+    } else if (this._step === 'paid') {
+      this.timePaid = Date.now();
+      this.timeoutTimer = setTimeout(() => {
+        if (this.step === 'paid') {
+          this.accelerateError = 'internal_server_error';
+        }
+      }, 120000);
+    }
+    this.hasDetails.emit(this._step === 'quote');
   }
-  scrollToPreview(id: string, position: ScrollLogicalPosition) {
+
+  closeModal(): void {
+    this.completed.emit(true);
+    this.moveToStep('summary');
+  }
+
+  /**
+   * Scroll to element id with or without setTimeout
+   */
+  scrollToElementWithTimeout(id: string, position: ScrollLogicalPosition, timeout: number = 1000): void {
+    setTimeout(() => {
+      this.scrollToElement(id, position);
+    }, timeout);
+  }
+  scrollToElement(id: string, position: ScrollLogicalPosition): void {
     const acceleratePreviewAnchor = document.getElementById(id);
     if (acceleratePreviewAnchor) {
       this.cd.markForCheck();
@@ -99,93 +274,411 @@ export class AccelerateCheckout implements OnInit, OnDestroy {
   /**
    * Accelerator
    */
-  estimate() {
+  fetchEstimate(): void {
     if (this.estimateSubscription) {
       this.estimateSubscription.unsubscribe();
     }
     this.calculating = true;
-    this.estimateSubscription = this.servicesApiService.estimate$(this.txid).pipe(
+    this.quoteError = null;
+    this.accelerateError = null;
+    this.estimateSubscription = this.servicesApiService.estimate$(this.tx.txid).pipe(
       tap((response) => {
-        this.calculating = false;
         if (response.status === 204) {
-          this.error = `cannot_accelerate_tx`;
+          this.quoteError = `cannot_accelerate_tx`;
+          if (this.step === 'summary') {
+            this.unavailable.emit(true);
+          }
         } else {
-          const estimation = response.body;
+          this.estimate = response.body;
-          if (!estimation) {
+          if (!this.estimate) {
-            this.error = `cannot_accelerate_tx`;
+            this.quoteError = `cannot_accelerate_tx`;
+            if (this.step === 'summary') {
+              this.unavailable.emit(true);
+            }
             return;
           }
-          // Make min extra fee at least 50% of the current tx fee
+          if (this.estimate.hasAccess === true && this.estimate.userBalance <= 0) {
-          const minExtraBoost = nextRoundNumber(Math.max(estimation.cost * 2, estimation.txSummary.effectiveFee));
+            if (this.isLoggedIn()) {
-          const DEFAULT_BID_RATIO = 2;
+              this.quoteError = `not_enough_balance`;
-          this.maxBidBoost = minExtraBoost * DEFAULT_BID_RATIO;
+            }
-          this.cost = this.maxBidBoost + estimation.mempoolBaseFee + estimation.vsizeFee;
+          }
+          if (this.estimate.unavailable) {
+            this.quoteError = `temporarily_unavailable`;
+          }
+          this.hasAncestors = this.estimate.txSummary.ancestorCount > 1;
+          this.etaInfo$ = this.etaService.getProjectedEtaObservable(this.estimate, this.miningStats);
+
+          this.maxRateOptions = this.estimate.options.map((option, index) => ({
+            fee: option.fee,
+            rate: (this.estimate.txSummary.effectiveFee + option.fee) / this.estimate.txSummary.effectiveVsize,
+            index
+          }));
+
+          this.defaultBid = this.maxRateOptions[1].fee;
+          this.userBid = this.defaultBid;
+          this.cost = this.userBid + this.estimate.mempoolBaseFee + this.estimate.vsizeFee;
+
+          this.validateChoice();
+
+          if (!this.couldPay) {
+            this.quoteError = `cannot_accelerate_tx`;
+            if (this.step === 'summary') {
+              this.unavailable.emit(true);
+            }
+            return;
+          }
+
+          if (this.step === 'checkout' && this.canPayWithBitcoin && !this.loadingBtcpayInvoice) {
+            this.loadingBtcpayInvoice = true;
+            this.requestBTCPayInvoice();
+          }
+
+          this.calculating = false;
+          this.cd.markForCheck();
         }
       }),
 
-      catchError((response) => {
+      catchError(() => {
-        this.error = `cannot_accelerate_tx`;
+        this.estimate = undefined;
+        this.quoteError = `cannot_accelerate_tx`;
+        this.estimateSubscription.unsubscribe();
+        if (this.step === 'summary') {
+          this.unavailable.emit(true);
+        } else {
+          this.accelerateError = 'cannot_accelerate_tx';
+        }
         return of(null);
       })
     ).subscribe();
   }
 
+  validateChoice(): void {
+    if (!this.canPay) {
+      if (this.estimate?.availablePaymentMethods?.balance) {
+        if (this.cost >= this.estimate?.userBalance) {
+          this.cantPayReason = 'not_enough_balance';
+        }
+      } else {
+        this.cantPayReason = 'cannot_accelerate_tx';
+      }
+    } else {
+      this.cantPayReason = '';
+    }
+  }
+
+  /**
+   * User changed his bid
+   */
+  setUserBid({ fee, index }: { fee: number, index: number}): void {
+    if (this.estimate) {
+      this.selectFeeRateIndex = index;
+      this.userBid = Math.max(0, fee);
+      this.cost = this.userBid + this.estimate.mempoolBaseFee + this.estimate.vsizeFee;
+    }
+  }
+
+  /**
+   * Account-based acceleration request
+   */
+  accelerateWithMempoolAccount(): void {
+    if (!this.canPay || this.calculating || this.processing) {
+      return;
+    }
+    this.processing = true;
+    if (this.accelerationSubscription) {
+      this.accelerationSubscription.unsubscribe();
+    }
+    this.accelerationSubscription = this.servicesApiService.accelerate$(
+      this.tx.txid,
+      this.userBid,
+      this.accelerationUUID
+    ).subscribe({
+      next: () => {
+        this.processing = false;
+        this.apiService.logAccelerationRequest$(this.tx.txid).subscribe();
+        this.audioService.playSound('ascend-chime-cartoon');
+        this.showSuccess = true;
+        this.estimateSubscription.unsubscribe();
+        this.moveToStep('paid');
+      },
+      error: (response) => {
+        this.processing = false;
+        this.accelerateError = response.error;
+      }
+    });
+  }
+
   /**
    * Square
    */
   insertSquare(): void {
-    //@ts-ignore
+    if (!this.isProdDomain && !isDevMode()) {
-    if (window.Square) {
+      return;
+    }
+    if (window['Square']) {
       return;
     }
     let statsUrl = 'https://sandbox.web.squarecdn.com/v1/square.js';
-    if (document.location.hostname === 'mempool-staging.fmt.mempool.space' ||
+    if (this.isProdDomain) {
-        document.location.hostname === 'mempool-staging.va1.mempool.space' ||
+      statsUrl = '/square/v1/square.js';
-        document.location.hostname === 'mempool-staging.fra.mempool.space' ||
-        document.location.hostname === 'mempool-staging.tk7.mempool.space' ||
-        document.location.hostname === 'mempool.space') {
-      statsUrl = 'https://web.squarecdn.com/v1/square.js';
     }
 
-    (function() {
+    (function(): void {
       const d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
-      // @ts-ignore
       g.type='text/javascript'; g.src=statsUrl; s.parentNode.insertBefore(g, s);
     })();
   }
-  setupSquare() {
+  setupSquare(): void {
-    const init = () => {
+    if (!this.isProdDomain && !isDevMode()) {
+      return;
+    }
+    const init = (): void => {
       this.initSquare();
     };
 
-    //@ts-ignore
+    if (!window['Square']) {
-    if (!window.Square) {
+      console.debug('Square.js failed to load properly. Retrying.');
-      console.debug('Square.js failed to load properly. Retrying in 1 second.');
+      setTimeout(this.setupSquare.bind(this), 100);
-      setTimeout(init, 1000);
     } else {
       init();
     }
   }
   async initSquare(): Promise<void> {
     try {
-      //@ts-ignore
+      this.servicesApiService.setupSquare$().subscribe({
-      this.payments = window.Square.payments(this.square.appId, this.square.locationId)
+        next: async (ids) => {
-      await this.requestCashAppPayment();
+          this.payments = window['Square'].payments(ids.squareAppId, ids.squareLocationId);
+          const urlParams = new URLSearchParams(window.location.search);
+          if (this._step === 'cashapp' || urlParams.get('cash_request_id')) {
+            await this.requestCashAppPayment();
+          } else if (this._step === 'applepay') {
+            await this.requestApplePayPayment();
+          } else if (this._step === 'googlepay') {
+            await this.requestGooglePayPayment();
+          }
+        },
+        error: () => {
+          console.debug('Error loading Square Payments');
+          this.accelerateError = 'cannot_setup_square';
+        }
+      });
     } catch (e) {
       console.debug('Error loading Square Payments', e);
-      return;
+      this.accelerateError = 'cannot_setup_square';
     }
   }
-  async requestCashAppPayment() {
+
-    if (this.cashAppSubscription) {
+  /**
-      this.cashAppSubscription.unsubscribe();
+   * APPLE PAY
+   */
+  async requestApplePayPayment(): Promise<void> {
+    if (this.processing) {
+      return;
+    }
+    if (this.conversionsSubscription) {
+      this.conversionsSubscription.unsubscribe();
+    }
+
+    this.processing = true;
+    this.conversionsSubscription = this.stateService.conversions$.subscribe(
+      async (conversions) => {
+        this.conversions = conversions;
+        if (this.applePay) {
+          this.applePay.destroy();
+        }
+
+        const costUSD = this.cost / 100_000_000 * conversions.USD;
+        const paymentRequest = this.payments.paymentRequest({
+          countryCode: 'US',
+          currencyCode: 'USD',
+          total: {
+            amount: costUSD.toFixed(2),
+            label: 'Total',
+          },
+        });
+
+        try {
+          this.applePay = await this.payments.applePay(paymentRequest);
+          const applePayButton = document.getElementById('apple-pay-button');
+          if (!applePayButton) {
+            console.error(`Unable to find apple pay button id='apple-pay-button'`);
+            // Try again
+            setTimeout(this.requestApplePayPayment.bind(this), 500);
+            this.processing = false;
+            return;
+          }
+          this.loadingApplePay = false;
+          applePayButton.addEventListener('click', async event => {
+            event.preventDefault();
+            const tokenResult = await this.applePay.tokenize();
+            if (tokenResult?.status === 'OK') {
+              const card = tokenResult.details?.card;
+              if (!card || !card.brand || !card.expMonth || !card.expYear || !card.last4) {
+                console.error(`Cannot retreive payment card details`);
+                this.accelerateError = 'apple_pay_no_card_details';
+                this.processing = false;
+                return;
+              }
+              const cardTag = md5(`${card.brand}${card.expMonth}${card.expYear}${card.last4}`.toLowerCase());
+              this.servicesApiService.accelerateWithApplePay$(
+                this.tx.txid,
+                tokenResult.token,
+                cardTag,
+                `accelerator-${this.tx.txid.substring(0, 15)}-${Math.round(new Date().getTime() / 1000)}`,
+                this.accelerationUUID
+              ).subscribe({
+                next: () => {
+                  this.processing = false;
+                  this.apiService.logAccelerationRequest$(this.tx.txid).subscribe();
+                  this.audioService.playSound('ascend-chime-cartoon');
+                  if (this.applePay) {
+                    this.applePay.destroy();
+                  }
+                  setTimeout(() => {
+                    this.moveToStep('paid');
+                  }, 1000);
+                },
+                error: (response) => {
+                  this.processing = false;
+                  this.accelerateError = response.error;
+                  if (!(response.status === 403 && response.error === 'not_available')) {
+                    setTimeout(() => {
+                      // Reset everything by reloading the page :D, can be improved
+                      const urlParams = new URLSearchParams(window.location.search);
+                      window.location.assign(window.location.toString().replace(`?cash_request_id=${urlParams.get('cash_request_id')}`, ``));
+                    }, 3000);
+                  }
+                }
+              });
+            } else {
+              this.processing = false;
+              let errorMessage = `Tokenization failed with status: ${tokenResult.status}`;
+              if (tokenResult.errors) {
+                errorMessage += ` and errors: ${JSON.stringify(
+                  tokenResult.errors,
+                )}`;
+              }
+              throw new Error(errorMessage);
+            }
+          });
+        } catch (e) {
+          this.processing = false;
+          console.error(e);
+        }
+      }
+    );
+  }
+
+  /**
+   * GOOGLE PAY
+   */
+  async requestGooglePayPayment(): Promise<void> {
+    if (this.processing) {
+      return;
     }
     if (this.conversionsSubscription) {
       this.conversionsSubscription.unsubscribe();
     }
     
+    this.processing = true;
     this.conversionsSubscription = this.stateService.conversions$.subscribe(
       async (conversions) => {
+        this.conversions = conversions;
+        if (this.googlePay) {
+          this.googlePay.destroy();
+        }
+
+        const costUSD = this.cost / 100_000_000 * conversions.USD;
+        const paymentRequest = this.payments.paymentRequest({
+          countryCode: 'US',
+          currencyCode: 'USD',
+          total: {
+            amount: costUSD.toFixed(2),
+            label: 'Total'
+          }
+        });
+        this.googlePay = await this.payments.googlePay(paymentRequest , {
+          referenceId: `accelerator-${this.tx.txid.substring(0, 15)}-${Math.round(new Date().getTime() / 1000)}`,
+        });
+
+        await this.googlePay.attach(`#google-pay-button`, {
+          buttonType: 'pay',
+          buttonSizeMode: 'fill',
+        });
+        this.loadingGooglePay = false;
+
+        document.getElementById('google-pay-button').addEventListener('click', async event => {
+          event.preventDefault();
+          const tokenResult = await this.googlePay.tokenize();
+          if (tokenResult?.status === 'OK') {
+            const card = tokenResult.details?.card;
+            if (!card || !card.brand || !card.expMonth || !card.expYear || !card.last4) {
+              console.error(`Cannot retreive payment card details`);
+              this.accelerateError = 'apple_pay_no_card_details';
+              this.processing = false;
+              return;
+            }
+            const cardTag = md5(`${card.brand}${card.expMonth}${card.expYear}${card.last4}`.toLowerCase());
+            this.servicesApiService.accelerateWithGooglePay$(
+              this.tx.txid,
+              tokenResult.token,
+              cardTag,
+              `accelerator-${this.tx.txid.substring(0, 15)}-${Math.round(new Date().getTime() / 1000)}`,
+              this.accelerationUUID
+            ).subscribe({
+              next: () => {
+                this.processing = false;
+                this.apiService.logAccelerationRequest$(this.tx.txid).subscribe();
+                this.audioService.playSound('ascend-chime-cartoon');
+                if (this.googlePay) {
+                  this.googlePay.destroy();
+                }
+                setTimeout(() => {
+                  this.moveToStep('paid');
+                }, 1000);
+              },
+              error: (response) => {
+                this.processing = false;
+                this.accelerateError = response.error;
+                if (!(response.status === 403 && response.error === 'not_available')) {
+                  setTimeout(() => {
+                    // Reset everything by reloading the page :D, can be improved
+                    const urlParams = new URLSearchParams(window.location.search);
+                    window.location.assign(window.location.toString().replace(`?cash_request_id=${urlParams.get('cash_request_id')}`, ``));
+                  }, 3000);
+                }
+              }
+            });
+          } else {
+            this.processing = false;
+            let errorMessage = `Tokenization failed with status: ${tokenResult.status}`;
+            if (tokenResult.errors) {
+              errorMessage += ` and errors: ${JSON.stringify(
+                tokenResult.errors,
+              )}`;
+            }
+            throw new Error(errorMessage);
+          }
+        });
+      }
+    );
+  }
+
+  /**
+   * CASHAPP
+   */
+  async requestCashAppPayment(): Promise<void> {
+    if (this.processing) {
+      return;
+    }
+    if (this.conversionsSubscription) {
+      this.conversionsSubscription.unsubscribe();
+    }
+
+    this.processing = true;
+    this.conversionsSubscription = this.stateService.conversions$.subscribe(
+      async (conversions) => {
+        this.conversions = conversions;
         if (this.cashAppPay) {
           this.cashAppPay.destroy();
         }
@@ -196,44 +689,42 @@ export class AccelerateCheckout implements OnInit, OnDestroy {
           countryCode: 'US',
           currencyCode: 'USD',
           total: {
-            amount: costUSD.toString(),
+            amount: costUSD.toFixed(2),
             label: 'Total',
             pending: true,
-            productUrl: `${redirectHostname}/tracker/${this.txid}`,
+            productUrl: `${redirectHostname}/tx/${this.tx.txid}`,
-          },
+          }
-          button: { shape: 'semiround', size: 'small', theme: 'light'}
         });
         this.cashAppPay = await this.payments.cashAppPay(paymentRequest, {
-          redirectURL: `${redirectHostname}/tracker/${this.txid}`,
+          redirectURL: `${redirectHostname}/tx/${this.tx.txid}`,
-          referenceId: `accelerator-${this.txid.substring(0, 15)}-${Math.round(new Date().getTime() / 1000)}`,
+          referenceId: `accelerator-${this.tx.txid.substring(0, 15)}-${Math.round(new Date().getTime() / 1000)}`
-          button: { shape: 'semiround', size: 'small', theme: 'light'}
         });
 
-        if (this.step === 'checkout') {
+        await this.cashAppPay.attach(`#cash-app-pay`, { theme: 'dark' });
-          await this.cashAppPay.attach(`#cash-app-pay`, { theme: 'light', size: 'small', shape: 'semiround' })
-        }
         this.loadingCashapp = false;
 
-        const that = this;
+        this.cashAppPay.addEventListener('ontokenization', event => {
-        this.cashAppPay.addEventListener('ontokenization', function (event) {
           const { tokenResult, error } = event.detail;
           if (error) {
-            this.error = error;
+            this.processing = false;
+            this.accelerateError = error;
           } else if (tokenResult.status === 'OK') {
-            that.servicesApiService.accelerateWithCashApp$(
+            this.servicesApiService.accelerateWithCashApp$(
-              that.txid,
+              this.tx.txid,
               tokenResult.token,
               tokenResult.details.cashAppPay.cashtag,
               tokenResult.details.cashAppPay.referenceId,
-              that.accelerationUUID
+              this.accelerationUUID
             ).subscribe({
               next: () => {
-                that.audioService.playSound('ascend-chime-cartoon');
+                this.processing = false;
-                if (that.cashAppPay) {
+                this.apiService.logAccelerationRequest$(this.tx.txid).subscribe();
-                  that.cashAppPay.destroy();
+                this.audioService.playSound('ascend-chime-cartoon');
+                if (this.cashAppPay) {
+                  this.cashAppPay.destroy();
                 }
                 setTimeout(() => {
-                  that.closeModal();
+                  this.moveToStep('paid');
                   if (window.history.replaceState) {
                     const urlParams = new URLSearchParams(window.location.search);
                     window.history.replaceState(null, null, window.location.toString().replace(`?cash_request_id=${urlParams.get('cash_request_id')}`, ''));
@@ -241,10 +732,9 @@ export class AccelerateCheckout implements OnInit, OnDestroy {
                 }, 1000);
               },
               error: (response) => {
-                if (response.status === 403 && response.error === 'not_available') {
+                this.processing = false;
-                  that.error = 'waitlisted';
+                this.accelerateError = response.error;
-                } else {
+                if (!(response.status === 403 && response.error === 'not_available')) {
-                  that.error = response.error;
                   setTimeout(() => {
                     // Reset everything by reloading the page :D, can be improved
                     const urlParams = new URLSearchParams(window.location.search);
@@ -259,19 +749,162 @@ export class AccelerateCheckout implements OnInit, OnDestroy {
     );
   }
 
+  /**
+   * BTCPay
+   */
+  async requestBTCPayInvoice(): Promise<void> {
+    this.servicesApiService.generateBTCPayAcceleratorInvoice$(this.tx.txid, this.userBid).pipe(
+      switchMap(response => {
+        return this.servicesApiService.retreiveInvoice$(response.btcpayInvoiceId);
+      }),
+      catchError(error => {
+        console.log(error);
+        this.btcpayInvoiceFailed = true;
+        return of(null);
+      })
+    ).subscribe((invoice) => {
+        this.invoice = invoice;
+        this.cd.markForCheck();
+    });
+  }
+
+  bitcoinPaymentCompleted(): void {
+    this.apiService.logAccelerationRequest$(this.tx.txid).subscribe();
+    this.audioService.playSound('ascend-chime-cartoon');
+    this.estimateSubscription.unsubscribe();
+    this.moveToStep('paid');
+  }
+
+  isLoggedIn(): boolean {
+    return this.auth !== null;
+  }
+
   /**
    * UI events
    */
-  enableCheckoutPage() {
+  selectedOptionChanged(event): void {
-    this.step = 'checkout';
+    this.selectedOption = event.target.id;
-    this.loadingCashapp = true;
-    this.insertSquare();
-    this.setupSquare();
   }
-  selectedOptionChanged(event) {
+
-    this.choosenOption = event.target.id;
+  get step(): CheckoutStep {
+    return this._step;
   }
-  closeModal(): void {
+
-    this.close.emit();
+  get paymentMethods(): PaymentMethod[] {
+    return Object.keys(this.estimate?.availablePaymentMethods || {}) as PaymentMethod[];
+  }
+
+  get couldPayWithBitcoin(): boolean {
+    return !!this.estimate?.availablePaymentMethods?.bitcoin;
+  }
+
+  get couldPayWithCashapp(): boolean {
+    if (!this.cashappEnabled) {
+      return false;
+    }
+    return !!this.estimate?.availablePaymentMethods?.cashapp;
+  }
+
+  get couldPayWithApplePay(): boolean {
+    if (!this.applePayEnabled) {
+      return false;
+    }
+    return !!this.estimate?.availablePaymentMethods?.applePay;
+  }
+
+  get couldPayWithGooglePay(): boolean {
+    if (!this.googlePayEnabled) {
+      return false;
+    }
+    return !!this.estimate?.availablePaymentMethods?.googlePay;
+  }
+
+  get couldPayWithBalance(): boolean {
+    if (!this.hasAccessToBalanceMode) {
+      return false;
+    }
+    return !!this.estimate?.availablePaymentMethods?.balance;
+  }
+
+  get couldPay(): boolean {
+    return this.couldPayWithBalance || this.couldPayWithBitcoin || this.couldPayWithCashapp || this.couldPayWithApplePay || this.couldPayWithGooglePay;
+  }
+
+  get canPayWithBitcoin(): boolean {
+    const paymentMethod = this.estimate?.availablePaymentMethods?.bitcoin;
+    return paymentMethod && this.cost >= paymentMethod.min && this.cost <= paymentMethod.max;
+  }
+
+  get canPayWithCashapp(): boolean {
+    if (!this.cashappEnabled || !this.conversions || (!this.isProdDomain && !isDevMode())) {
+      return false;
+    }
+
+    const paymentMethod = this.estimate?.availablePaymentMethods?.cashapp;
+    if (paymentMethod) {
+      const costUSD = (this.cost / 100_000_000 * this.conversions.USD);
+      if (costUSD >= paymentMethod.min && costUSD <= paymentMethod.max) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  get canPayWithApplePay(): boolean {
+    if (!this.applePayEnabled || !this.conversions || (!this.isProdDomain && !isDevMode())) {
+      return false;
+    }
+
+    const paymentMethod = this.estimate?.availablePaymentMethods?.applePay;
+    if (paymentMethod) {
+      const costUSD = (this.cost / 100_000_000 * this.conversions.USD);
+      if (costUSD >= paymentMethod.min && costUSD <= paymentMethod.max) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  get canPayWithGooglePay(): boolean {
+    if (!this.googlePayEnabled || !this.conversions || (!this.isProdDomain && !isDevMode())) {
+      return false;
+    }
+
+    const paymentMethod = this.estimate?.availablePaymentMethods?.googlePay;
+    if (paymentMethod) {
+      const costUSD = (this.cost / 100_000_000 * this.conversions.USD);
+      if (costUSD >= paymentMethod.min && costUSD <= paymentMethod.max) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  get canPayWithBalance(): boolean {
+    if (!this.hasAccessToBalanceMode) {
+      return false;
+    }
+    const paymentMethod = this.estimate?.availablePaymentMethods?.balance;
+    return paymentMethod && this.cost >= paymentMethod.min && this.cost <= paymentMethod.max && this.cost <= this.estimate?.userBalance;
+  }
+
+  get canPay(): boolean {
+    return this.canPayWithBalance || this.canPayWithBitcoin || this.canPayWithCashapp || this.canPayWithApplePay || this.canPayWithGooglePay;
+  }
+
+  get hasAccessToBalanceMode(): boolean {
+    return this.isLoggedIn() && this.estimate?.hasAccess;
+  }
+
+  get timeSincePaid(): number {
+    return Date.now() - this.timePaid;
+  }
+
+  @HostListener('window:resize', ['$event'])
+  onResize(): void {
+    this.isMobile = window.innerWidth <= 767.98;
   }
 }

frontend/src/app/components/accelerate-checkout/accelerate-fee-graph.component.html

@@ -1,4 +1,4 @@
-<div class="fee-graph" *ngIf="tx && estimate">
+<div class="fee-graph" *ngIf="tx && estimate" #feeGraph>
   <div class="column">
     <ng-container *ngFor="let bar of bars">
       <div class="bar {{ bar.class }}" [class.active]="bar.active" [style]="bar.style" (click)="onClick($event, bar);">
@@ -12,7 +12,7 @@
           </p>
         </div>
         <div class="spacer"></div>
-        <span class="fee">{{ bar.class === 'tx' ? '' : '+' }} {{ bar.fee | number }} <span class="symbol" i18n="shared.sat|sat">sat</span></span>
+        <span class="fee">{{ bar.class === 'tx' ? '' : '+' }}{{ bar.fee | number }} <span class="symbol" i18n="shared.sats">sats</span></span>
         <div class="spacer"></div>
         <div class="spacer"></div>
       </div>

frontend/src/app/components/accelerate-checkout/accelerate-fee-graph.component.scss

@@ -4,7 +4,6 @@
   width: 120px;
   margin-left: 4em;
   margin-right: 1.5em;
-  padding-bottom: 63px;
 
   .column {
     width: 100%;

frontend/src/app/components/accelerate-checkout/accelerate-fee-graph.component.ts

@@ -0,0 +1,152 @@
+import { Component, Input, Output, OnChanges, EventEmitter, HostListener, OnInit, ViewChild, ElementRef, AfterViewInit, OnDestroy, ChangeDetectorRef } from '@angular/core';
+import { Transaction } from '../../interfaces/electrs.interface';
+import { AccelerationEstimate, RateOption } from './accelerate-checkout.component';
+
+interface GraphBar {
+  rate: number;
+  style?: Record<string,string>;
+  class: 'tx' | 'target' | 'max';
+  label: string;
+  active?: boolean;
+  rateIndex?: number;
+  fee?: number;
+  height?: number;
+}
+
+@Component({
+  selector: 'app-accelerate-fee-graph',
+  templateUrl: './accelerate-fee-graph.component.html',
+  styleUrls: ['./accelerate-fee-graph.component.scss'],
+})
+export class AccelerateFeeGraphComponent implements OnInit, AfterViewInit, OnChanges, OnDestroy {
+  @Input() tx: Transaction;
+  @Input() estimate: AccelerationEstimate;
+  @Input() showEstimate = false;
+  @Input() maxRateOptions: RateOption[] = [];
+  @Input() maxRateIndex: number = 0;
+  @Output() setUserBid = new EventEmitter<{ fee: number, index: number }>();
+
+  @ViewChild('feeGraph')
+  container: ElementRef<HTMLDivElement>;
+  height: number;
+  observer: ResizeObserver;
+  stopResizeLoop = false;
+
+  bars: GraphBar[] = [];
+  tooltipPosition = { x: 0, y: 0 };
+
+  constructor(
+    private cd: ChangeDetectorRef,
+  ) {}
+
+  ngOnInit(): void {
+    this.initGraph();
+  }
+
+  ngAfterViewInit(): void {
+    if (ResizeObserver) {
+      this.observer = new ResizeObserver(entries => {
+        for (const entry of entries) {
+          this.height = entry.contentRect.height;
+          this.initGraph();
+        }
+      });
+      this.observer.observe(this.container.nativeElement);
+    } else {
+      this.startResizeFallbackLoop();
+    }
+  }
+
+  ngOnChanges(): void {
+    this.initGraph();
+  }
+
+  initGraph(): void {
+    if (!this.tx || !this.estimate) {
+      return;
+    }
+    const hasNextBlockRate = (this.estimate.nextBlockFee > this.estimate.txSummary.effectiveFee);
+    const numBars = hasNextBlockRate ? 4 : 3;
+    const maxRate = Math.max(...this.maxRateOptions.map(option => option.rate));
+    const baseRate = this.estimate.txSummary.effectiveFee / this.estimate.txSummary.effectiveVsize;
+    let baseHeight = Math.max(this.height - (numBars * 30), this.height * (baseRate / maxRate));
+    const bars: GraphBar[] = [];
+    let lastHeight = 0;
+    if (hasNextBlockRate) {
+      lastHeight = Math.max(lastHeight + 30, (this.height * ((this.estimate.targetFeeRate - baseRate) / maxRate)));
+      bars.push({
+        rate: this.estimate.targetFeeRate,
+        height: lastHeight,
+        class: 'target',
+        label: $localize`:@@bdf0e930eb22431140a2eaeacd809cc5f8ebd38c:Next Block`.toLowerCase(),
+        fee: this.estimate.nextBlockFee - this.estimate.txSummary.effectiveFee
+      });
+    }
+    this.maxRateOptions.forEach((option, index) => {
+      lastHeight = Math.max(lastHeight + 30, (this.height * ((option.rate - baseRate) / maxRate)));
+      bars.push({
+        rate: option.rate,
+        height: lastHeight,
+        class: 'max',
+        label: this.showEstimate ? $localize`maximum` : $localize`accelerated`,
+        active: option.index === this.maxRateIndex,
+        rateIndex: option.index,
+        fee: option.fee,
+      })
+    })
+
+    bars.reverse();
+
+    baseHeight = this.height - lastHeight;
+
+    for (const bar of bars) {
+      bar.style = this.getStyle(bar.height, baseHeight);
+    }
+
+    bars.push({
+      rate: baseRate,
+      style: this.getStyle(baseHeight, 0),
+      height: baseHeight,
+      class: 'tx',
+      label: '',
+      fee: this.estimate.txSummary.effectiveFee,
+    });
+
+    this.bars = bars;
+    this.cd.detectChanges();
+  }
+
+  getStyle(height: number, base: number): Record<string,string> {
+    return {
+      height: `${height}px`,
+      bottom: base ? `${base}px` : '0',
+    }
+  }
+
+  onClick(event, bar): void {
+    if (bar.rateIndex != null) {
+      this.setUserBid.emit({ fee: bar.fee, index: bar.rateIndex });
+    }
+  }
+
+  @HostListener('pointermove', ['$event'])
+  onPointerMove(event) {
+    this.tooltipPosition = { x: event.offsetX, y: event.offsetY };
+  }
+
+  startResizeFallbackLoop(): void {
+    if (this.stopResizeLoop) {
+      return;
+    }
+    requestAnimationFrame(() => {
+      this.height = this.container?.nativeElement?.clientHeight || 0;
+      this.initGraph();
+      this.startResizeFallbackLoop();
+    });
+  }
+
+  ngOnDestroy(): void {
+    this.stopResizeLoop = true;
+    this.observer.disconnect();
+  }
+}

frontend/src/app/components/accelerate-preview/accelerate-fee-graph.component.ts

@@ -1,98 +0,0 @@
-import { Component, OnInit, Input, Output, OnChanges, EventEmitter, HostListener, Inject, LOCALE_ID } from '@angular/core';
-import { StateService } from '../../services/state.service';
-import { Outspend, Transaction, Vin, Vout } from '../../interfaces/electrs.interface';
-import { Router } from '@angular/router';
-import { ReplaySubject, merge, Subscription, of } from 'rxjs';
-import { tap, switchMap } from 'rxjs/operators';
-import { ApiService } from '../../services/api.service';
-import { AccelerationEstimate, RateOption } from './accelerate-preview.component';
-
-interface GraphBar {
-  rate: number;
-  style: any;
-  class: 'tx' | 'target' | 'max';
-  label: string;
-  active?: boolean;
-  rateIndex?: number;
-  fee?: number;
-}
-
-@Component({
-  selector: 'app-accelerate-fee-graph',
-  templateUrl: './accelerate-fee-graph.component.html',
-  styleUrls: ['./accelerate-fee-graph.component.scss'],
-})
-export class AccelerateFeeGraphComponent implements OnInit, OnChanges {
-  @Input() tx: Transaction;
-  @Input() estimate: AccelerationEstimate;
-  @Input() maxRateOptions: RateOption[] = [];
-  @Input() maxRateIndex: number = 0;
-  @Output() setUserBid = new EventEmitter<{ fee: number, index: number }>();
-
-  bars: GraphBar[] = [];
-  tooltipPosition = { x: 0, y: 0 };
-
-  ngOnInit(): void {
-    this.initGraph();
-  }
-
-  ngOnChanges(): void {
-    this.initGraph();
-  }
-
-  initGraph(): void {
-    if (!this.tx || !this.estimate) {
-      return;
-    }
-    const maxRate = Math.max(...this.maxRateOptions.map(option => option.rate));
-    const baseRate = this.estimate.txSummary.effectiveFee / this.estimate.txSummary.effectiveVsize;
-    const baseHeight = baseRate / maxRate;
-    const bars: GraphBar[] = this.maxRateOptions.slice().reverse().map(option => {
-      return {
-        rate: option.rate,
-        style: this.getStyle(option.rate, maxRate, baseHeight),
-        class: 'max',
-        label: $localize`maximum`,
-        active: option.index === this.maxRateIndex,
-        rateIndex: option.index,
-        fee: option.fee,
-      }
-    });
-    if (this.estimate.nextBlockFee > this.estimate.txSummary.effectiveFee) {
-      bars.push({
-        rate: this.estimate.targetFeeRate,
-        style: this.getStyle(this.estimate.targetFeeRate, maxRate, baseHeight),
-        class: 'target',
-        label: $localize`:@@bdf0e930eb22431140a2eaeacd809cc5f8ebd38c:Next Block`.toLowerCase(),
-        fee: this.estimate.nextBlockFee - this.estimate.txSummary.effectiveFee
-      });
-    }
-    bars.push({
-      rate: baseRate,
-      style: this.getStyle(baseRate, maxRate, 0),
-      class: 'tx',
-      label: '',
-      fee: this.estimate.txSummary.effectiveFee,
-    });
-    this.bars = bars;
-  }
-
-  getStyle(rate, maxRate, base) {
-    const top = (rate / maxRate);
-    return {
-      height: `${(top - base) * 100}%`,
-      bottom: base ? `${base * 100}%` : '0',
-    }
-  }
-
-  onClick(event, bar): void {
-    if (bar.rateIndex != null) {
-      this.setUserBid.emit({ fee: bar.fee, index: bar.rateIndex });
-    }
-  }
-
-  @HostListener('pointermove', ['$event'])
-  onPointerMove(event) {
-    this.tooltipPosition = { x: event.offsetX, y: event.offsetY };
-  }
-}

frontend/src/app/components/accelerate-preview/accelerate-preview.component.html

@@ -1,250 +0,0 @@
-<span id="successAlert" class="m-0 p-0 d-block" style="height: 1px;"></span>
-<div class="row" *ngIf="showSuccess">
-  <div class="col">
-    <div class="alert alert-success">
-      Transaction has now been <a class="alert-link" routerLink="/services/accelerator/history">submitted</a> to mining pools for acceleration.
-    </div>
-  </div>
-</div>
-
-<span id="mempoolError" class="m-0 p-0 d-block" style="height: 1px;"></span>
-<div class="row" *ngIf="error">
-  <div class="col">
-    <app-mempool-error [error]="error" [alertClass]="error === 'waitlisted' ? 'alert-mempool' : 'alert-danger'"></app-mempool-error>
-  </div>
-</div>
-
-<div class="accelerate-cols">
-  <ng-container *ngIf="!isMobile">
-    <app-accelerate-fee-graph
-      [tx]="tx"
-      [estimate]="estimate"
-      [maxRateOptions]="maxRateOptions"
-      [maxRateIndex]="selectFeeRateIndex"
-      (setUserBid)="setUserBid($event)"
-    ></app-accelerate-fee-graph>
-  </ng-container>
-
-  <ng-container *ngIf="estimate else loadingEstimate">
-    <div [class]="{estimateDisabled: error || showSuccess }">
-
-      <div *ngIf="user && !estimate.hasAccess">
-        <div class="alert alert-mempool">You are currently on the waitlist</div>
-      </div>
-
-      <h5 i18n="accelerator.your-transaction">Your transaction</h5>
-      <div class="row">
-        <div class="col">
-          <small *ngIf="hasAncestors" class="form-text text-muted mb-2">
-            <ng-container i18n="accelerator.plus-unconfirmed-ancestors">Plus {{ estimate.txSummary.ancestorCount - 1 }} unconfirmed ancestor(s)</ng-container>
-          </small>
-          <table class="table table-borderless table-border table-dark table-background table-accelerator">
-            <tbody>
-              <tr class="group-first">
-                <td class="item" i18n="transaction.vsize|Transaction Virtual Size">Virtual size</td>
-                <td style="text-align: end;" [innerHTML]="'&lrm;' + (estimate.txSummary.effectiveVsize | vbytes: 2)"></td>
-              </tr>
-              <tr class="info">
-                <td class="info" colspan=3>
-                  <i><small i18n="accelerator.transaction-vbytes-size-description">Size in vbytes of this transaction (including unconfirmed ancestors)</small></i>
-                </td>
-              </tr>
-              <tr>
-                <td class="item" i18n="accelerator.in-band-fees">In-band fees</td>
-                <td style="text-align: end;">
-                  {{ estimate.txSummary.effectiveFee | number : '1.0-0' }} <span class="symbol" i18n="shared.sats">sats</span>
-                </td>
-              </tr>
-              <tr class="info group-last">
-                <td class="info" colspan=3>
-                  <i><small i18n="accelerator.fees-already-paid-description">Fees already paid by this transaction (including unconfirmed ancestors)</small></i>
-                </td>
-              </tr>
-            </tbody>
-          </table>
-        </div>
-      </div>
-      <br>
-      <h5 i18n="accelerator.pay-how-much">How much more are you willing to pay?</h5>
-      <div class="row">
-        <div class="col">
-          <small class="form-text text-muted mb-2" i18n="accelerator.transaction-fee-description">Choose the maximum extra transaction fee you're willing to pay to get into the next block.</small>
-          <div class="form-group">
-            <div class="fee-card">
-              <div class="d-flex mb-0">
-                <ng-container *ngFor="let option of maxRateOptions">
-                  <button type="button" class="btn btn-primary flex-grow-1 btn-border btn-sm feerate" [class]="{active: selectFeeRateIndex === option.index}" (click)="setUserBid(option)">
-                    <span class="fee">{{ option.fee + estimate.mempoolBaseFee + estimate.vsizeFee | number }} <span class="symbol" i18n="shared.sats">sats</span></span>
-                    <span class="rate">~<app-fee-rate [fee]="option.rate" rounding="1.0-0"></app-fee-rate></span>
-                  </button>
-                </ng-container>
-              </div>
-            </div>
-          </div>
-        </div>
-      </div>
-  
-      <h5>Acceleration summary</h5>
-      <div class="row mb-3">
-        <div class="col">
-          <table class="table table-borderless table-border table-dark table-background table-accelerator">
-            <tbody>
-              <!-- ESTIMATED FEE -->
-              <ng-container>
-                <tr class="group-first">
-                  <td class="item" i18n="accelerator.next-block-rate">Next block market rate</td>
-                  <td class="amt" style="font-size: 16px">
-                    {{ estimate.targetFeeRate | number : '1.0-0' }}
-                  </td>
-                  <td class="units"><span class="symbol" i18n="shared.sat-vbyte|sat/vB">sat/vB</span></td>
-                </tr>
-                <tr class="info">
-                  <td class="info">
-                    <i><small i18n="accelerator.estimated-extra-fee-required">Estimated extra fee required</small></i>
-                  </td>
-                  <td class="amt">
-                    {{ math.max(0, estimate.nextBlockFee - estimate.txSummary.effectiveFee) | number }}
-                  </td>
-                  <td class="units">
-                    <span class="symbol" i18n="shared.sats">sats</span>
-                    <span class="fiat ml-1"><app-fiat [value]="math.max(0, estimate.nextBlockFee - estimate.txSummary.effectiveFee)"></app-fiat></span>
-                  </td>
-                </tr>
-              </ng-container>
-  
-              <!-- MEMPOOL BASE FEE -->
-              <tr>
-                <td class="item" i18n="accelerator.mempool-accelerator-fees">Mempool Accelerator™ fees</td>
-              </tr>
-              <tr class="info">
-                <td class="info">
-                  <i><small i18n="accelerator.service-fee">Accelerator Service Fee</small></i>
-                </td>
-                <td class="amt">
-                  +{{ estimate.mempoolBaseFee | number }}
-                </td>
-                <td class="units">
-                  <span class="symbol" i18n="shared.sats">sats</span>
-                  <span class="fiat ml-1"><app-fiat [value]="estimate.mempoolBaseFee"></app-fiat></span>
-                </td>
-              </tr>
-              <tr class="info group-last">
-                <td class="info">
-                  <i><small i18n="accelerator.tx-size-surcharge">Transaction Size Surcharge</small></i>
-                </td>
-                <td class="amt">
-                  +{{ estimate.vsizeFee | number }}
-                </td>
-                <td class="units">
-                  <span class="symbol" i18n="shared.sats">sats</span>
-                  <span class="fiat ml-1"><app-fiat [value]="estimate.vsizeFee"></app-fiat></span>
-                </td>
-              </tr>
-
-              
-              <!-- NEXT BLOCK ESTIMATE -->
-              <ng-container>
-                <tr class="group-first" style="border-top: 1px dashed grey; border-collapse: collapse;">
-                  <td class="item">
-                    <b style="background-color: #5E35B1" class="p-1 pl-0" i18n="accelerator.estimated-cost">Estimated acceleration cost</b>
-                  </td>
-                  <td class="amt">
-                    <span style="background-color: #5E35B1" class="p-1 pl-0">
-                      {{ estimate.cost + estimate.mempoolBaseFee + estimate.vsizeFee | number }}
-                    </span>
-                  </td>
-                  <td class="units">
-                    <span class="symbol" i18n="shared.sats">sats</span>
-                    <span class="fiat ml-1"><app-fiat [value]="estimate.cost + estimate.mempoolBaseFee + estimate.vsizeFee"></app-fiat></span>
-                  </td>
-                </tr>
-                <tr class="info group-last" style="border-bottom: 1px solid lightgrey">
-                  <td class="info" colspan=3>
-                    <i><small><ng-container *ngTemplateOutlet="acceleratedTo; context: {$implicit: estimate.targetFeeRate }"></ng-container></small></i>
-                  </td>
-                </tr>
-              </ng-container>
-
-              <!-- MAX COST -->
-              <ng-container>
-                <tr class="group-first">
-                  <td class="item">
-                    <b style="background-color: var(--primary);" class="p-1 pl-0" i18n="accelerator.maximum-cost">Maximum acceleration cost</b>
-                  </td>
-                  <td class="amt">
-                    <span style="background-color: var(--primary)" class="p-1 pl-0">
-                      {{ maxCost | number }}
-                    </span>
-                  </td>
-                  <td class="units">
-                    <span class="symbol" i18n="shared.sats">sats</span>
-                    <span class="fiat ml-1">
-                      <app-fiat [value]="maxCost" [colorClass]="estimate.userBalance < maxCost ? 'red-color' : 'green-color'"></app-fiat>
-                    </span>
-                  </td>
-                </tr>
-                <tr class="info group-last">
-                  <td class="info" colspan=3>
-                    <i><small><ng-container *ngTemplateOutlet="acceleratedTo; context: {$implicit: (estimate.txSummary.effectiveFee + userBid) / estimate.txSummary.effectiveVsize }"></ng-container></small></i>
-                  </td>
-                </tr>
-              </ng-container>
-  
-              <!-- USER BALANCE -->
-              <ng-container *ngIf="isLoggedIn() && estimate.userBalance < maxCost">
-                <tr class="group-first group-last" style="border-top: 1px dashed grey">
-                  <td class="item" i18n="accelerator.available-balance">Available balance</td>
-                  <td class="amt">
-                    {{ estimate.userBalance | number }}
-                  </td>
-                  <td class="units">
-                    <span class="symbol" i18n="shared.sats">sats</span>
-                    <span class="fiat ml-1">
-                      <app-fiat [value]="estimate.userBalance" [colorClass]="estimate.userBalance < maxCost ? 'red-color' : 'green-color'"></app-fiat>
-                    </span>
-                  </td>
-                </tr>
-              </ng-container>
-
-              <!-- LOGIN CTA -->
-              <ng-container *ngIf="stateService.isMempoolSpaceBuild && !isLoggedIn()">
-                <tr class="group-first group-last" style="border-top: 1px dashed grey">
-                  <td class="item"></td>
-                  <td class="amt"></td>
-                  <td class="units d-flex">
-                    <a [routerLink]="['/login']" [queryParams]="{redirectTo: '/tx/' + tx.txid + '#accelerate'}" class="btn btn-purple flex-grow-1" i18n="shared.sign-in">Sign In</a>
-                  </td>
-                </tr>
-              </ng-container>
-              <ng-container *ngIf="!stateService.isMempoolSpaceBuild">
-                <tr class="group-first group-last" style="border-top: 1px dashed grey">
-                  <td class="item"></td>
-                  <td class="amt"></td>
-                  <td class="units d-flex">
-                    <a [href]="'https://mempool.space/tx/' + tx.txid + '#accelerate'" class="btn btn-purple flex-grow-1" i18n="accelerator.accelerate-on-mempoolspace">Accelerate on mempool.space</a>
-                  </td>
-                </tr>
-              </ng-container>
-            </tbody>
-          </table>
-        </div>
-      </div>
-  
-      <div class="row mb-3" *ngIf="isLoggedIn()">
-        <div class="col">
-          <div class="d-flex justify-content-end" *ngIf="user && estimate.hasAccess">
-            <button class="btn btn-sm btn-primary btn-success" style="width: 150px" (click)="accelerate()" i18n="transaction.accelerate|Accelerate button label">Accelerate</button>
-          </div>
-        </div>
-      </div>
-  
-    </div>
-  </ng-container>
-</div>
-
-<ng-template #loadingEstimate>
-  <div class="skeleton-loader"></div>
-  <br>
-</ng-template>
-
-<ng-template #acceleratedTo let-i i18n="accelerator.accelerated-to-description">If your tx is accelerated to ~{{ i | number : '1.0-0' }} sat/vB</ng-template>

frontend/src/app/components/accelerate-preview/accelerate-preview.component.scss

@@ -1,116 +0,0 @@
-.fee-card {
-  padding: 15px;
-  background-color: var(--bg);
-
-  .feerate {
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-    justify-content: center;
-
-    .rate {
-      font-size: 0.9em;
-      .symbol {
-        color: white;
-      }
-    }
-  }
-}
-
-.btn-border {
-  border: solid 1px black;
-  background-color: #0c4a87;
-}
-
-.feerate.active {
-  background-color: var(--primary) !important;
-  opacity: 1;
-  border: 1px solid #007fff !important;
-}
-.feerate:focus {
-  box-shadow: none !important;
-}
-
-.estimateDisabled {
-  opacity: 0.5;
-  pointer-events: none;
-}
-
-.table-toggle {
-  width: 100%;
-  margin-top: 0.5em;
-}
-
-.tab {
-  &:first-child {
-    margin-right: 1px;
-  }
-  border: solid 1px black;
-  border-bottom: none;
-  background-color: #323655;
-  border-top-left-radius: 10px !important;
-  border-top-right-radius: 10px !important;
-}
-.tab.active {
-  background-color: #5d659d !important;
-  opacity: 1;
-}
-.tab:focus {
-  box-shadow: none !important;
-}
-
-.table-accelerator {
-  tr {
-    td {
-      padding-top: 0;
-      padding-bottom: 0;
-      vertical-align: baseline;
-    }
-
-    &.group-first {
-      td {
-        padding-top: 0.75rem;
-      }
-    }
-    &.group-last {
-      td {
-        padding-bottom: 0.75rem;
-      }
-    }
-  }
-  td {
-    &:first-child {
-      width: 100vw;
-    }
-    &.info {
-      color: #6c757d;
-      white-space: initial;
-    }
-    &.amt {
-      text-align: right;
-      padding-right: 0.2em;
-    }
-    &.units {
-      padding-left: 0.2em;
-      white-space: nowrap;
-      display: flex;
-      justify-content: space-between;
-      align-items: center;
-    }
-  }
-}
-
-.accelerate-cols {
-  display: flex;
-  flex-direction: row;
-  align-items: stretch;
-  margin-top: 1em;
-}
-
-.item {
-  white-space: initial;
-}
-
-.table-background {
-  background-color: var(--bg);
-}

frontend/src/app/components/accelerate-preview/accelerate-preview.component.ts

@@ -1,240 +0,0 @@
-import { Component, OnInit, Input, OnDestroy, OnChanges, SimpleChanges, HostListener, ChangeDetectorRef } from '@angular/core';
-import { Subscription, catchError, of, tap } from 'rxjs';
-import { StorageService } from '../../services/storage.service';
-import { Transaction } from '../../interfaces/electrs.interface';
-import { nextRoundNumber } from '../../shared/common.utils';
-import { ServicesApiServices } from '../../services/services-api.service';
-import { AudioService } from '../../services/audio.service';
-import { StateService } from '../../services/state.service';
-
-export type AccelerationEstimate = {
-  txSummary: TxSummary;
-  nextBlockFee: number;
-  targetFeeRate: number;
-  userBalance: number;
-  enoughBalance: boolean;
-  cost: number;
-  mempoolBaseFee: number;
-  vsizeFee: number;
-}
-export type 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 RateOption {
-  fee: number;
-  rate: number;
-  index: number;
-}
-
-export const MIN_BID_RATIO = 1;
-export const DEFAULT_BID_RATIO = 2;
-export const MAX_BID_RATIO = 4;
-
-@Component({
-  selector: 'app-accelerate-preview',
-  templateUrl: 'accelerate-preview.component.html',
-  styleUrls: ['accelerate-preview.component.scss']
-})
-export class AcceleratePreviewComponent implements OnInit, OnDestroy, OnChanges {
-  @Input() tx: Transaction | undefined;
-  @Input() scrollEvent: boolean;
-
-  math = Math;
-  error = '';
-  showSuccess = false;
-  estimateSubscription: Subscription;
-  accelerationSubscription: Subscription;
-  estimate: any;
-  hasAncestors: boolean = false;
-  minExtraCost = 0;
-  minBidAllowed = 0;
-  maxBidAllowed = 0;
-  defaultBid = 0;
-  maxCost = 0;
-  userBid = 0;
-  accelerationUUID: string;
-  selectFeeRateIndex = 1;
-  isMobile: boolean = window.innerWidth <= 767.98;
-  user: any = undefined;
-
-  maxRateOptions: RateOption[] = [];
-
-  constructor(
-    public stateService: StateService,
-    private servicesApiService: ServicesApiServices,
-    private storageService: StorageService,
-    private audioService: AudioService,
-    private cd: ChangeDetectorRef
-  ) {
-  }
-
-  ngOnDestroy(): void {
-    if (this.estimateSubscription) {
-      this.estimateSubscription.unsubscribe();
-    }
-  }
-
-  ngOnInit() {
-    this.accelerationUUID = window.crypto.randomUUID();
-  }
-
-  ngOnChanges(changes: SimpleChanges): void {
-    if (changes.scrollEvent) {
-      this.scrollToPreview('acceleratePreviewAnchor', 'start');
-    }
-  }
-
-  ngAfterViewInit() {
-    this.user = this.storageService.getAuth()?.user ?? null;
-
-    this.estimateSubscription = this.servicesApiService.estimate$(this.tx.txid).pipe(
-      tap((response) => {
-        if (response.status === 204) {
-          this.estimate = undefined;
-          this.error = `cannot_accelerate_tx`;
-          this.scrollToPreviewWithTimeout('mempoolError', 'center');
-          this.estimateSubscription.unsubscribe();
-        } else {
-          this.estimate = response.body;
-          if (!this.estimate) {
-            this.error = `cannot_accelerate_tx`;
-            this.scrollToPreviewWithTimeout('mempoolError', 'center');
-            this.estimateSubscription.unsubscribe();
-          }
-
-          if (this.estimate.hasAccess === true && this.estimate.userBalance <= 0) {
-            if (this.isLoggedIn()) {
-              this.error = `not_enough_balance`;
-              this.scrollToPreviewWithTimeout('mempoolError', 'center');
-            }
-          }
-
-          this.hasAncestors = this.estimate.txSummary.ancestorCount > 1;
-          
-          // Make min extra fee at least 50% of the current tx fee
-          this.minExtraCost = nextRoundNumber(Math.max(this.estimate.cost * 2, this.estimate.txSummary.effectiveFee));
-
-          this.maxRateOptions = [1, 2, 4].map((multiplier, index) => {
-            return {
-              fee: this.minExtraCost * multiplier,
-              rate: (this.estimate.txSummary.effectiveFee + (this.minExtraCost * multiplier)) / this.estimate.txSummary.effectiveVsize,
-              index,
-            };
-          });
-
-          this.minBidAllowed = this.minExtraCost * MIN_BID_RATIO;
-          this.defaultBid = this.minExtraCost * DEFAULT_BID_RATIO;
-          this.maxBidAllowed = this.minExtraCost * MAX_BID_RATIO;
-
-          this.userBid = this.defaultBid;
-          if (this.userBid < this.minBidAllowed) {
-            this.userBid = this.minBidAllowed;
-          } else if (this.userBid > this.maxBidAllowed) {
-            this.userBid = this.maxBidAllowed;
-          }            
-          this.maxCost = this.userBid + this.estimate.mempoolBaseFee + this.estimate.vsizeFee;
-
-          if (!this.error) {
-            this.scrollToPreview('acceleratePreviewAnchor', 'start');
-
-            setTimeout(() => {
-              this.onScroll();
-            }, 100);
-          }
-        }
-      }),
-      catchError((response) => {
-        this.estimate = undefined;
-        this.error = response.error;
-        this.scrollToPreviewWithTimeout('mempoolError', 'center');
-        this.estimateSubscription.unsubscribe();
-        return of(null);
-      })
-    ).subscribe();
-  }
-
-  /**
-   * User changed his bid
-   */
-  setUserBid({ fee, index }: { fee: number, index: number}) {
-    if (this.estimate) {
-      this.selectFeeRateIndex = index;
-      this.userBid = Math.max(0, fee);
-      this.maxCost = this.userBid + this.estimate.mempoolBaseFee + this.estimate.vsizeFee;
-    }
-  }
-
-  /**
-   * Scroll to element id with or without setTimeout
-   */
-  scrollToPreviewWithTimeout(id: string, position: ScrollLogicalPosition) {
-    setTimeout(() => {
-      this.scrollToPreview(id, position);
-    }, 100);
-  }
-  scrollToPreview(id: string, position: ScrollLogicalPosition) {
-    const acceleratePreviewAnchor = document.getElementById(id);
-    if (acceleratePreviewAnchor) {
-      this.cd.markForCheck();
-      acceleratePreviewAnchor.scrollIntoView({
-        behavior: 'smooth',
-        inline: position,
-        block: position,
-      });
-    }
-  }
-
-  /**
-   * Send acceleration request
-   */
-  accelerate() {
-    if (this.accelerationSubscription) {
-      this.accelerationSubscription.unsubscribe();
-    }
-    this.accelerationSubscription = this.servicesApiService.accelerate$(
-      this.tx.txid,
-      this.userBid,
-      this.accelerationUUID
-    ).subscribe({
-      next: () => {
-        this.audioService.playSound('ascend-chime-cartoon');
-        this.showSuccess = true;
-        this.scrollToPreviewWithTimeout('successAlert', 'center');
-        this.estimateSubscription.unsubscribe();
-      },
-      error: (response) => {
-        if (response.status === 403 && response.error === 'not_available') {
-          this.error = 'waitlisted';
-        } else {
-          this.error = response.error;
-        }
-        this.scrollToPreviewWithTimeout('mempoolError', 'center');
-      }
-    });
-  }
-
-  isLoggedIn() {
-    const auth = this.storageService.getAuth();
-    return auth !== null;
-  }
-
-  @HostListener('window:resize', ['$event'])
-  onResize(): void {
-    this.isMobile = window.innerWidth <= 767.98;
-  }
-
-
-  @HostListener('window:scroll', ['$event']) // for window scroll events
-  onScroll() {
-    if (this.estimate) {
-      setTimeout(() => {
-        this.onScroll();
-      }, 200);
-      return;
-    }
-  }
-}