feat(test): add interop test harness for CLN, LND, Eclair #265

	name: CI Checks - CLN Integration Tests

	on: [push, pull_request]

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	check-cln:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Create temporary directory for CLN data
	run: echo "CLN_DATA_DIR=$(mktemp -d)" >> $GITHUB_ENV

	- name: Start bitcoind, electrs, and lightningd
	run: docker compose -p ldk-node -f tests/docker/docker-compose-cln.yml up -d
	env:
	CLN_DATA_DIR: ${{ env.CLN_DATA_DIR }}

	- name: Wait for CLN to be ready
	run: \|
	for i in $(seq 1 30); do
	if docker exec ldk-node-cln-1 lightning-cli --regtest getinfo 2>/dev/null \| grep -q '"id"'; then
	echo "CLN is ready"
	break
	fi
	echo "Waiting for CLN... ($i/30)"
	sleep 2
	done
	docker exec ldk-node-cln-1 lightning-cli --regtest getinfo \|\| {
	echo "ERROR: CLN not responding"
	docker compose -p ldk-node -f tests/docker/docker-compose-cln.yml logs cln
	exit 1
	}

	- name: Set permissions for CLN data directory
	run: \|
	sudo chown -R $(id -u):$(id -g) $CLN_DATA_DIR
	sudo chmod 755 $CLN_DATA_DIR
	sudo find $CLN_DATA_DIR -type d -exec chmod 755 {} +
	sudo find $CLN_DATA_DIR -type f -exec chmod 644 {} +
	env:
	CLN_DATA_DIR: ${{ env.CLN_DATA_DIR }}

	- name: Run CLN integration tests
	run: CLN_SOCKET_PATH=$CLN_DATA_DIR/regtest/lightning-rpc
	RUSTFLAGS="--cfg cln_test" cargo test --test integration_tests_cln -- --show-output --test-threads=1
	env:
	CLN_DATA_DIR: ${{ env.CLN_DATA_DIR }}

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