Update github workflow with gap filling service integration test

.github/workflows/on-pr.yaml

@@ -42,8 +42,6 @@ jobs:
       ETH_FORWARD_ETH_CALLS: false
       ETH_PROXY_ON_ERROR: false
       ETH_HTTP_PATH: ""
-      WATCHED_ADDRESS_GAP_FILLER_ENABLED: true
-      WATCHED_ADDRESS_GAP_FILLER_INTERVAL: 5
     strategy:
       matrix:
         go-version: [1.16.x]
@@ -93,3 +91,34 @@ jobs:
           while [ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:8081)" != "200" ]; do echo "waiting for ipld-eth-server..." && sleep 5; done && \
           while [ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:8545)" != "200" ]; do echo "waiting for geth-statediff..." && sleep 5; done && \
           make integrationtest
+
+  integrationtest_watchedaddress_gapfillingservice:
+    name: Run integration tests for watched addresses with gap filling service enabled
+    env:
+      GOPATH: /tmp/go
+      DB_WRITE: true
+      ETH_FORWARD_ETH_CALLS: false
+      ETH_PROXY_ON_ERROR: false
+      ETH_HTTP_PATH: ""
+      WATCHED_ADDRESS_GAP_FILLER_ENABLED: true
+      WATCHED_ADDRESS_GAP_FILLER_INTERVAL: 2
+    strategy:
+      matrix:
+        go-version: [1.16.x]
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Create GOPATH
+        run: mkdir -p /tmp/go
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - uses: actions/checkout@v2
+      - name: Run database
+        run: docker-compose -f docker-compose.test.yml -f docker-compose.yml up -d ipld-eth-db dapptools contract eth-server
+      - name: Test
+        run: |
+          while [ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:8081)" != "200" ]; do echo "waiting for ipld-eth-server..." && sleep 5; done && \
+          while [ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:8545)" != "200" ]; do echo "waiting for geth-statediff..." && sleep 5; done && \
+          make integrationtest