From 693b845c45cb1683dcfeeb3fd3961e7e64e6e871 Mon Sep 17 00:00:00 2001
From: Felipe Knorr Kuhn <git@knorrium.info>
Date: Sat, 23 Sep 2023 11:57:20 -0700
Subject: [PATCH 1/2] Add block height workflow

---
 .../workflows/get_backend_block_height.yml    | 19 +++++++++++++++
 scripts/get_block_tip_height.sh               | 24 +++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 .github/workflows/get_backend_block_height.yml
 create mode 100644 scripts/get_block_tip_height.sh

diff --git a/.github/workflows/get_backend_block_height.yml b/.github/workflows/get_backend_block_height.yml
new file mode 100644
index 000000000..52f3b038c
--- /dev/null
+++ b/.github/workflows/get_backend_block_height.yml
@@ -0,0 +1,19 @@
+name: 'Check if servers are in sync'
+
+on: [workflow_dispatch]
+
+jobs:
+  print-backend-sha:
+    runs-on: 'ubuntu-latest'
+    name: Get block height
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: repo
+
+      - name: Run script
+        working-directory: repo
+        run: |
+          chmod +x ./scripts/get_block_tip_height.sh
+          sh ./scripts/get_block_tip_height.sh
diff --git a/scripts/get_block_tip_height.sh b/scripts/get_block_tip_height.sh
new file mode 100644
index 000000000..861be0406
--- /dev/null
+++ b/scripts/get_block_tip_height.sh
@@ -0,0 +1,24 @@
+BASE_HEIGHT=$(curl -sk https://node202.tk7.mempool.space/api/v1/blocks/tip/height)
+IN_SYNC=true
+echo "Base height (node202.tk7): $BASE_HEIGHT"
+
+for LOCATION in fmt va1 fra tk7
+do
+  for NODE in 201 202 203 204 205 206
+  do
+    NODE_HEIGHT=$(curl -sk https://node$NODE.$LOCATION.mempool.space/api/v1/blocks/tip/height)
+    echo $(echo node$NODE.$LOCATION.mempool.space) - $NODE_HEIGHT
+    if [ "$NODE_HEIGHT" -ne "$BASE_HEIGHT" ]; then
+      echo $(echo node$NODE.$LOCATION.mempool.space) is not in sync
+      IN_SYNC=false
+    fi
+  done
+done
+
+if [ "$IN_SYNC" = false ]; then
+  echo "One or more servers are out of sync. Check the logs."
+  exit -1
+else
+  echo "All servers are in sync."
+fi
+

From 24b3ca559d89bf9665111c28c9e5e1c27e63b2c5 Mon Sep 17 00:00:00 2001
From: Felipe Knorr Kuhn <git@knorrium.info>
Date: Sat, 23 Sep 2023 13:30:54 -0700
Subject: [PATCH 2/2] Add block delta to the logs

---
 scripts/get_block_tip_height.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/get_block_tip_height.sh b/scripts/get_block_tip_height.sh
index 861be0406..603193bb8 100644
--- a/scripts/get_block_tip_height.sh
+++ b/scripts/get_block_tip_height.sh
@@ -9,7 +9,8 @@ do
     NODE_HEIGHT=$(curl -sk https://node$NODE.$LOCATION.mempool.space/api/v1/blocks/tip/height)
     echo $(echo node$NODE.$LOCATION.mempool.space) - $NODE_HEIGHT
     if [ "$NODE_HEIGHT" -ne "$BASE_HEIGHT" ]; then
-      echo $(echo node$NODE.$LOCATION.mempool.space) is not in sync
+      COUNT=$((BASE_HEIGHT-NODE_HEIGHT))
+      echo $(echo node$NODE.$LOCATION.mempool.space) is not in sync. delta: $COUNT
       IN_SYNC=false
     fi
   done