integration tests: update CI to include regtest env setup

Author: KyrylR

.github/actions/setup-regtest-execs/action.yml

@@ -0,0 +1,38 @@
+name: Setup regtest executables
+description: Download and expose Liquid regtest executables for CI
+
+runs:
+  using: composite
+  steps:
+    - name: Download regtest executables
+      shell: bash
+      run: |
+        set -euo pipefail
+
+        BIN_DIR="${RUNNER_TEMP}/regtest-bin"
+        mkdir -p "${BIN_DIR}"
+        cd "${BIN_DIR}"
+
+        ELECTRS_FILENAME="electrs_linux_esplora_027e38d3ebc2f85b28ae76f8f3448438ee4fc7b1_liquid.zip"
+        ELECTRS_SHA256="a63a314c16bc6642fc060bbc19bd1d54ebf86b42188ff2a11c705177c1eb22f7"
+        if [ ! -x "${BIN_DIR}/electrs" ]; then
+          curl -Ls "https://github.com/RCasatta/electrsd/releases/download/electrs_releases/${ELECTRS_FILENAME}" -o "${ELECTRS_FILENAME}"
+          echo "${ELECTRS_SHA256}  ${ELECTRS_FILENAME}" | sha256sum -c -
+          unzip -qo "${ELECTRS_FILENAME}"
+          chmod +x "${BIN_DIR}/electrs"
+        fi
+
+        ELEMENTSD_VERSION="23.3.1"
+        ELEMENTSD_FILENAME="elements-${ELEMENTSD_VERSION}-x86_64-linux-gnu.tar.gz"
+        ELEMENTSD_SHA256="864e3a8240137c4e948ecae7c526ccb363771351ea68737a14c682025d5fedaa"
+        if [ ! -x "${BIN_DIR}/elements-${ELEMENTSD_VERSION}/bin/elementsd" ]; then
+          curl -Ls "https://github.com/ElementsProject/elements/releases/download/elements-${ELEMENTSD_VERSION}/${ELEMENTSD_FILENAME}" -o "${ELEMENTSD_FILENAME}"
+          echo "${ELEMENTSD_SHA256}  ${ELEMENTSD_FILENAME}" | sha256sum -c -
+          tar -xzf "${ELEMENTSD_FILENAME}"
+          chmod +x "${BIN_DIR}/elements-${ELEMENTSD_VERSION}/bin/elementsd"
+        fi
+
+        echo "${BIN_DIR}" >> "${GITHUB_PATH}"
+        echo "${BIN_DIR}/elements-${ELEMENTSD_VERSION}/bin" >> "${GITHUB_PATH}"
+        echo "ELECTRS_LIQUID_EXEC=${BIN_DIR}/electrs" >> "${GITHUB_ENV}"
+        echo "ELEMENTSD_EXEC=${BIN_DIR}/elements-${ELEMENTSD_VERSION}/bin/elementsd" >> "${GITHUB_ENV}"

.github/workflows/tests.yml

@@ -21,7 +21,7 @@ permissions:
 
 jobs:
   test:
-    name: Build and test (matrix)
+    name: Build and test (matrix, non-regtest)
     runs-on: ubuntu-latest
     services:
       postgres:
@@ -88,8 +88,46 @@ jobs:
           cd crates/indexer
           SKIP_DOCKER=true ./scripts/init_db.sh
 
-      - name: Run tests
-        run: cargo test --workspace --all-features --no-fail-fast --verbose
+      - name: Run non-regtest workspace tests
+        run: cargo test --workspace --all-features --exclude lending-contracts --no-fail-fast --verbose
+
+      - name: Run lending-contracts library tests
+        run: cargo test -p lending-contracts --lib --all-features --verbose
 
       - name: Check that queries are fresh
         run: cargo sqlx prepare --workspace --check -- --all-targets
+
+  contracts-regtest:
+    name: Contracts regtest tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Rust (stable)
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          toolchain: stable
+
+      - name: Cache cargo
+        uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
+
+      - name: Setup regtest executables
+        uses: ./.github/actions/setup-regtest-execs
+
+      - name: Test lending-contracts regtest integration tests
+        run: cargo test -p lending-contracts --tests --all-features --no-fail-fast --verbose -- --test-threads=1
+
+      - name: Assert no leaked regtest nodes after contracts tests
+        if: always()
+        run: |
+          set -euo pipefail
+          leaks="$(ps -eo pid=,comm=,args= | awk '$2=="elementsd" || $2=="electrs" {print}')"
+          if [ -n "$leaks" ]; then
+            echo "Leaked regtest node processes after contracts regtest tests:"
+            echo "$leaks"
+            exit 1
+          fi