Extract mempool_server

Author: piotr-iohk

.github/workflows/regtest-mine.yml

@@ -9,6 +9,10 @@ on:
         description: Blocktank base URL
         required: true
         default: 'https://api.stag0.blocktank.to/blocktank/api/v2'
+      mempool_server:
+        description: Mempool API base URL
+        required: true
+        default: 'https://mempool.bitkit.stag0.blocktank.to'
       block_count:
         description: Number of regtest blocks to mine
         required: true
@@ -20,7 +24,7 @@ jobs:
     env:
       BLOCK_COUNT: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.block_count || '1' }}
       BLOCKTANK_SERVER: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.blocktank_server || 'https://api.stag0.blocktank.to/blocktank/api/v2' }}
-      MEMPOOL_API: https://mempool.bitkit.stag0.blocktank.to/api/blocks/tip/height
+      MEMPOOL_SERVER: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.mempool_server || 'https://mempool.bitkit.stag0.blocktank.to' }}
     steps:
       - name: Validate params
         run: |
@@ -40,8 +44,13 @@ jobs:
             echo "BLOCKTANK_SERVER is empty" >&2
             exit 1
           fi
+          if [[ -z "${MEMPOOL_SERVER}" ]]; then
+            echo "MEMPOOL_SERVER is empty" >&2
+            exit 1
+          fi
       - name: Capture initial tip height
         run: |
+          MEMPOOL_API="${MEMPOOL_SERVER%/}/api/blocks/tip/height"
           TIP_BEFORE=$(curl -sS "${MEMPOOL_API}" | tr -dc '0-9')
           if [[ -z "${TIP_BEFORE}" ]]; then
             echo "Failed to obtain initial block height" >&2
@@ -59,6 +68,7 @@ jobs:
             -d "{\"count\": ${BLOCK_COUNT}}"
       - name: Verify new tip height
         run: |
+          MEMPOOL_API="${MEMPOOL_SERVER%/}/api/blocks/tip/height"
           EXPECTED=$((TIP_BEFORE + BLOCK_COUNT))
           echo "Waiting up to 10 seconds for tip height to reach ${EXPECTED}..."
           END=$((SECONDS + 10))