Merge the develop branch to the master branch, preparation to v2.5.0

* Add support to disable validator balance check in monitor
* Convert validator address to checksum address

.circleci/config.yml

@@ -1,257 +0,0 @@
-version: 2.1
-
-orbs:
-  tokenbridge-orb:
-    commands:
-      install-chrome:
-        steps:
-          - run: 
-              name: Install Chrome
-              command: |
-                wget -O chrome.deb https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
-                sudo dpkg -i chrome.deb
-      install-node:
-        steps:
-          - run:
-              name: Install Node
-              command: |
-                export NVM_DIR="/opt/circleci/.nvm"
-                [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
-
-                nvm install 11.4.0 && nvm alias default 11.4.0
-
-                echo 'export NVM_DIR="/opt/circleci/.nvm"' >> $BASH_ENV
-                echo ' [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"' >> $BASH_ENV
-      install-yarn:
-        steps:
-          - run:
-              name: Install Yarn
-              command: |
-                curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
-                echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
-                sudo apt-get update && sudo apt-get -y install yarn
-      yarn-install-cached-on-machine:
-        steps:
-          - restore_cache:
-              name: Restore Machine Yarn Package Cache
-              keys:
-                - yarn-machine-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
-          - run:
-              name: Install npm dependencies using Yarn
-              command: nvm use default; yarn install --frozen-lockfile
-          - save_cache:
-              name: Save Machine Yarn Package Cache
-              key: yarn-machine-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
-              paths:
-                - ~/.cache/yarn
-      wait-for-oracle:
-        parameters:
-          redis-key:
-            type: string
-        steps:
-          - run:
-              name: Install redis tools
-              command: sudo apt-get install -y redis-tools
-          - run:
-              name: Wait for the Oracle to start
-              command: |
-                set +e
-                i=0
-                while [[ $(redis-cli GET << parameters.redis-key >> ) ]]; do
-                  ((i++))
-                  if [ "$i" -gt 30 ]
-                  then
-                    exit -1
-                  fi
-
-                  echo "Sleeping..."
-                  sleep 3
-                done
-    executors:
-      docker-node:
-        docker:
-          - image: circleci/node:10.15
-      machine-with-docker-caching:
-        machine:
-          image: circleci/classic:latest
-          docker_layer_caching: true
-
-jobs:
-  initialize:
-    executor: tokenbridge-orb/docker-node
-    steps:
-      - checkout
-      - run: git submodule update --init
-      - restore_cache:
-           name: Restore Yarn Package Cache
-           keys:
-             - yarn-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
-      - run: git submodule status > submodule.status 
-      - restore_cache:
-           name: Restore contracts submodule with compiled contracts
-           keys:
-             - contracts-{{ checksum "submodule.status" }}
-      - run: yarn install --frozen-lockfile
-      - save_cache:
-           name: Save Yarn Package Cache
-           key: yarn-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
-           paths:
-             - ~/.cache/yarn
-      - run: touch install_deploy.log; test -d contracts/build/contracts || yarn install:deploy &> install_deploy.log
-      - store_artifacts:
-          path: install_deploy.log
-      - run: test -d contracts/build/contracts || yarn compile:contracts
-      - save_cache:
-           name: Save contracts submodule with compiled contracts
-           key: contracts-{{ checksum "submodule.status" }}
-           paths:
-             - contracts
-      - save_cache:
-          name: Save initialized project for subsequent jobs
-          key: initialize-{{ .Environment.CIRCLE_SHA1 }}
-          paths:
-            - ~/project
-  initialize-root:
-    executor: tokenbridge-orb/docker-node
-    steps:
-      - checkout
-      - run: sudo su - -c 'export CI=true && cd /home/circleci/project && yarn initialize && yarn test'
-  build:
-    executor: tokenbridge-orb/docker-node
-    steps:
-      - restore_cache:
-          key: initialize-{{ .Environment.CIRCLE_SHA1 }}
-      - run: yarn run build
-  lint:
-    executor: tokenbridge-orb/docker-node
-    steps:
-      - restore_cache:
-          key: initialize-{{ .Environment.CIRCLE_SHA1 }}
-      - run: yarn run lint
-  test:
-    executor: tokenbridge-orb/docker-node
-    steps:
-      - restore_cache:
-          key: initialize-{{ .Environment.CIRCLE_SHA1 }}
-      - run: yarn run test
-  oracle-e2e:
-    executor: tokenbridge-orb/docker-node
-    steps:
-        - checkout
-        - run: git submodule update --init
-        - setup_remote_docker:
-            docker_layer_caching: true
-        - run: yarn run oracle-e2e
-  ui-e2e:
-    executor: tokenbridge-orb/machine-with-docker-caching
-    steps:
-      - checkout
-      - tokenbridge-orb/install-node
-      - tokenbridge-orb/install-yarn
-      - tokenbridge-orb/install-chrome
-      - run: git submodule update --init
-      - tokenbridge-orb/yarn-install-cached-on-machine
-      - run: yarn run ui-e2e
-  monitor-e2e:
-    executor: tokenbridge-orb/machine-with-docker-caching
-    steps:
-        - checkout
-        - run: git submodule update --init
-        - run: ./monitor-e2e/run-tests.sh
-  cover:
-    executor: tokenbridge-orb/docker-node
-    steps:
-      - restore_cache:
-          key: initialize-{{ .Environment.CIRCLE_SHA1 }}
-      - run: yarn workspace ui run coverage
-      - run: yarn workspace ui run coveralls
-  deployment-oracle:
-    executor: tokenbridge-orb/machine-with-docker-caching
-    steps:
-      - checkout
-      - run: deployment/molecule/molecule.sh oracle
-  deployment-ui:
-    executor: tokenbridge-orb/machine-with-docker-caching
-    steps:
-      - checkout
-      - run: deployment/molecule/molecule.sh ui
-  deployment-monitor:
-    executor: tokenbridge-orb/machine-with-docker-caching
-    steps:
-      - checkout
-      - run: deployment/molecule/molecule.sh monitor
-  ultimate:
-    executor: tokenbridge-orb/machine-with-docker-caching
-    parameters:
-      scenario-name:
-        description: "Molecule scenario name used to create the infrastructure"
-        type: string
-      redis-key:
-        description: "Redis key checked for non-emptiness to assert if Oracle is running"
-        type: string
-      ui-e2e-grep:
-        description: "Mocha grep string used to run ui-e2e tests specific to given type of bridge"
-        type: string
-    steps:
-      - checkout
-      - run: git submodule update --init
-      - tokenbridge-orb/install-node
-      - tokenbridge-orb/install-chrome
-      - tokenbridge-orb/install-yarn
-      - tokenbridge-orb/yarn-install-cached-on-machine
-      - run:
-          name: Prepare the infrastructure
-          command: e2e-commons/up.sh deploy << parameters.scenario-name >>
-          no_output_timeout: 30m
-      - tokenbridge-orb/wait-for-oracle:
-          redis-key: << parameters.redis-key >>
-      - run:
-          name: Run the ui-e2e tests
-          command: |
-            nvm use default;
-            node ./e2e-commons/scripts/blocks.js &
-            cd ui-e2e; yarn mocha -g "<< parameters.ui-e2e-grep >>" -b ./test.js
-workflows:
-  tokenbridge:
-    jobs:
-      - initialize
-      - initialize-root:
-          filters:
-            branches:
-              only: master
-      - build:
-          requires:
-            - initialize
-      - lint:
-          requires:
-            - initialize
-      - test:
-          requires:
-            - initialize
-      - cover:
-          requires:
-            - initialize
-          filters:
-            branches:
-              only: master
-      - oracle-e2e
-      - ui-e2e
-      - monitor-e2e
-      - deployment-oracle
-      - deployment-ui
-      - deployment-monitor
-      - ultimate:
-          name: "ultimate: native to erc" 
-          scenario-name: native-to-erc
-          redis-key: native-erc-collected-signatures:lastProcessedBlock
-          ui-e2e-grep: "NATIVE TO ERC"
-      - ultimate:
-          name: "ultimate: erc to native" 
-          scenario-name: erc-to-native
-          redis-key: erc-native-collected-signatures:lastProcessedBlock
-          ui-e2e-grep: "ERC TO NATIVE"
-      - ultimate:
-          name: "ultimate: erc to erc" 
-          scenario-name: erc-to-erc
-          redis-key: erc-erc-collected-signatures:lastProcessedBlock
-          ui-e2e-grep: "ERC TO ERC"

.dockerignore

@@ -9,6 +9,11 @@
 **/*.md
 
 contracts/test
+contracts/build
 oracle/test
+monitor/test
+monitor/responses
+commons/test
 oracle/**/*.png
 oracle/**/*.jpg
+audit

.eslintignore

@@ -2,3 +2,5 @@ node_modules
 submodules
 coverage
 lib
+dist
+build

.github/workflows/main.yml

@@ -0,0 +1,231 @@
+name: tokenbridge
+
+on: [push]
+
+env:
+  DOCKER_REGISTRY: docker.pkg.github.com
+  DOCKER_REPO: poanetwork/tokenbridge
+  DOCKER_IMAGE_BASE: docker.pkg.github.com/poanetwork/tokenbridge
+
+jobs:
+  initialize:
+    runs-on: ubuntu-latest
+    outputs:
+      cache_key: ${{ steps.get_cache_key.outputs.cache_key }}
+    steps:
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 10
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - run: git submodule status > submodule.status
+      - id: get_cache_key
+        run: echo "::set-output name=cache_key::cache-repo-${{ hashFiles('yarn.lock', 'package.json', 'submodule.status') }}"
+      - uses: actions/cache@v2
+        id: cache-repo
+        with:
+          path: |
+            **/node_modules
+            contracts/build
+          key: ${{ steps.get_cache_key.outputs.cache_key }}
+      - if: ${{ !steps.cache-repo.outputs.cache-hit }}
+        run: |
+          yarn install --frozen-lockfile
+          yarn run install:deploy
+          yarn run compile:contracts
+  validate:
+    runs-on: ubuntu-latest
+    needs:
+      - initialize
+    strategy:
+      fail-fast: false
+      matrix:
+        task: [build, lint, test]
+    steps:
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 10
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - uses: actions/cache@v2
+        id: cache-repo
+        with:
+          path: |
+            **/node_modules
+            contracts/build
+          key: ${{ needs.initialize.outputs.cache_key }}
+      - run: ${{ steps.cache-repo.outputs.cache-hit }} && yarn run ${{ matrix.task }}
+  ui-coverage:
+    runs-on: ubuntu-latest
+    needs:
+      - initialize
+    if: github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags')
+    steps:
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 10
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - uses: actions/cache@v2
+        id: cache-repo
+        with:
+          path: |
+            **/node_modules
+            contracts/build
+          key: ${{ needs.initialize.outputs.cache_key }}
+      - run: ${{ steps.cache-repo.outputs.cache-hit }} && yarn workspace ui run coverage
+      - uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ github.token }}
+          path-to-lcov: ./ui/coverage/lcov.info
+  build-e2e-images:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - run: |
+          git submodule status > submodule.status
+          echo "::set-env name=E2E_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'Dockerfile.e2e', 'commons', 'oracle-e2e', 'monitor-e2e') }}"
+          echo "::set-env name=ORACLE_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'oracle') }}"
+          echo "::set-env name=MONITOR_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'monitor') }}"
+          echo "::set-env name=UI_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'ui') }}"
+          echo "::set-env name=ALM_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'alm') }}"
+      - run: |
+          function check_if_image_exists() {
+            curl -fsSlL -H 'Authorization: bearer ${{ github.token }}' "https://${DOCKER_REGISTRY}/v2/${DOCKER_REPO}/tokenbridge-e2e-$1/manifests/$2" > /dev/null
+          }
+          updated=()
+          if ! check_if_image_exists e2e ${E2E_TAG};         then updated+=("e2e"); fi
+          if ! check_if_image_exists oracle ${ORACLE_TAG};   then updated+=("oracle"); fi
+          if ! check_if_image_exists monitor ${MONITOR_TAG}; then updated+=("monitor"); fi
+          if ! check_if_image_exists ui ${UI_TAG};           then updated+=("ui"); fi
+          if ! check_if_image_exists alm ${ALM_TAG};         then updated+=("alm"); fi
+          if [ ${#updated[@]} -gt 0 ]; then
+            echo "Updated services: ${updated[@]}"
+            cd e2e-commons
+            docker login ${DOCKER_REGISTRY} -u ${{ github.actor }} -p ${{ github.token }}
+            docker-compose build ${updated[@]}
+            docker-compose push ${updated[@]}
+          else
+            echo "Nothing relevant was changed in the source"
+          fi
+  build-molecule-runner:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - run: echo "::set-env name=MOLECULE_RUNNER_TAG::${{ hashFiles('./deployment-e2e/Dockerfile') }}"
+      - run: |
+          function check_if_image_exists() {
+            curl -fsSlL -H 'Authorization: bearer ${{ github.token }}' "https://${DOCKER_REGISTRY}/v2/${DOCKER_REPO}/tokenbridge-e2e-$1/manifests/$2" > /dev/null
+          }
+          if check_if_image_exists molecule_runner ${MOLECULE_RUNNER_TAG}; then
+            echo "Image already exists"
+          else
+            cd e2e-commons
+            docker login ${DOCKER_REGISTRY} -u ${{ github.actor }} -p ${{ github.token }}
+            docker-compose build molecule_runner
+            docker-compose push molecule_runner
+          fi
+  e2e:
+    runs-on: ubuntu-latest
+    needs:
+      - initialize
+      - build-e2e-images
+    strategy:
+      fail-fast: false
+      matrix:
+        task: [oracle-e2e, monitor-e2e, alm-e2e, 'ui-e2e:ci']
+        include:
+          - task: alm-e2e
+            use-cache: true
+          - task: 'ui-e2e:ci'
+            use-cache: true
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - run: |
+          git submodule status > submodule.status
+          echo "::set-env name=E2E_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'Dockerfile.e2e', 'commons', 'oracle-e2e', 'monitor-e2e') }}"
+          echo "::set-env name=ORACLE_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'oracle') }}"
+          echo "::set-env name=MONITOR_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'monitor') }}"
+          echo "::set-env name=UI_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'ui') }}"
+          echo "::set-env name=ALM_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'alm') }}"
+      - if: ${{ matrix.use-cache }} 
+        uses: actions/cache@v2
+        id: cache-repo
+        with:
+          path: |
+            **/node_modules
+            contracts/build
+          key: ${{ needs.initialize.outputs.cache_key }}
+      - run: docker login ${DOCKER_REGISTRY} -u ${{ github.actor }} -p ${{ github.token }}
+      - run: ${{ !matrix.use-cache || steps.cache-repo.outputs.cache-hit }} && yarn run ${{ matrix.task }}
+  deployment:
+    runs-on: ubuntu-latest
+    needs:
+      - build-molecule-runner
+    strategy:
+      fail-fast: false
+      matrix:
+        task: [oracle, ui, monitor, multiple, repo]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - run: echo "::set-env name=MOLECULE_RUNNER_TAG::${{ hashFiles('./deployment-e2e/Dockerfile') }}"
+      - run: docker login ${DOCKER_REGISTRY} -u ${{ github.actor }} -p ${{ github.token }}
+      - run: deployment-e2e/molecule.sh ${{ matrix.task }}
+  ultimate:
+    runs-on: ubuntu-latest
+    needs:
+      - initialize
+      - build-e2e-images
+    if: github.ref == 'refs/heads/master' || github.ref == 'refs/heads/develop' || startsWith(github.ref, 'refs/tags')
+    strategy:
+      fail-fast: false
+      matrix:
+        task: [amb, erc-to-erc, erc-to-native, native-to-erc, amb-stake-erc-to-erc]
+        include:
+          - task: erc-to-erc
+            ui-e2e-grep: 'ERC TO ERC'
+          - task: erc-to-native
+            ui-e2e-grep: 'ERC TO NATIVE'
+          - task: native-to-erc
+            ui-e2e-grep: 'NATIVE TO ERC'
+          - task: amb-stake-erc-to-erc
+            ui-e2e-grep: 'AMB-STAKE-ERC-TO-ERC'
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - run: |
+          git submodule status > submodule.status
+          echo "::set-env name=E2E_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'Dockerfile.e2e', 'commons', 'oracle-e2e', 'monitor-e2e') }}"
+          echo "::set-env name=ORACLE_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'oracle') }}"
+          echo "::set-env name=MONITOR_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'monitor') }}"
+          echo "::set-env name=UI_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'ui') }}"
+          echo "::set-env name=ALM_TAG::${{ hashFiles('yarn.lock', 'package.json', 'submodule.status', 'commons', 'alm') }}"
+          echo "::set-env name=MOLECULE_RUNNER_TAG::${{ hashFiles('./deployment-e2e/Dockerfile') }}"
+      - uses: actions/cache@v2
+        id: cache-repo
+        with:
+          path: |
+            **/node_modules
+            contracts/build
+          key: ${{ needs.initialize.outputs.cache_key }}
+      - run: docker login ${DOCKER_REGISTRY} -u ${{ github.actor }} -p ${{ github.token }}
+      - run: ${{ steps.cache-repo.outputs.cache-hit }} && e2e-commons/up.sh deploy blocks
+      - run: docker-compose -f ./e2e-commons/docker-compose.yml pull oracle
+      - run: deployment-e2e/molecule.sh ultimate-${{ matrix.task }}
+      - run: sudo chown -R $USER:docker /var/run/docker.sock
+      - if: ${{ matrix.ui-e2e-grep }}
+        run: cd ui-e2e && xvfb-run yarn mocha -g "${{ matrix.ui-e2e-grep }}" -b ./test.js
+      - if: ${{ !matrix.ui-e2e-grep }}
+        run: docker-compose -f ./e2e-commons/docker-compose.yml run e2e yarn workspace oracle-e2e run ${{ matrix.task }}

.gitignore

@@ -6,6 +6,7 @@ coverage
 
 # production
 build
+dist
 
 # misc
 .DS_Store
@@ -48,4 +49,5 @@ __pycache__
 
 #monitor
 monitor/responses/*
-!monitor/.gitkeep
+monitor/configs/*.env
+!monitor/.gitkeep

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "contracts"]
 	path = contracts
-	url = https://github.com/poanetwork/poa-bridge-contracts.git
+	url = https://github.com/poanetwork/tokenbridge-contracts.git

.nvmrc

@@ -1 +1 @@
-10.15
+10.22

CONFIGURATION.md

@@ -0,0 +1,76 @@
+# Configuration
+
+## Common configuration
+
+name | description | value
+--- | --- | ---
+COMMON_HOME_RPC_URL | The HTTPS URL(s) used to communicate to the RPC nodes in the Home network. Several URLs can be specified, delimited by spaces. If the connection to one of these nodes is lost the next URL is used for connection. | URL(s)
+COMMON_FOREIGN_RPC_URL | The HTTPS URL(s) used to communicate to the RPC nodes in the Foreign network. Several URLs can be specified, delimited by spaces. If the connection to one of these nodes is lost the next URL is used for connection. | URL(s)
+COMMON_HOME_BRIDGE_ADDRESS | The address of the bridge contract address in the Home network. It is used to listen to events from and send validators' transactions to the Home network. | hexidecimal beginning with "0x"
+COMMON_FOREIGN_BRIDGE_ADDRESS | The  address of the bridge contract address in the Foreign network. It is used to listen to events from and send validators' transactions to the Foreign network. | hexidecimal beginning with "0x"
+COMMON_HOME_GAS_PRICE_SUPPLIER_URL | The URL used to get a JSON response from the gas price prediction oracle for the Home network. The gas price provided by the oracle is used to send the validator's transactions to the RPC node. Since it is assumed that the Home network has a predefined gas price (e.g. the gas price in the Core of POA.Network is `1 GWei`), the gas price oracle parameter can be omitted for such networks. | URL
+COMMON_HOME_GAS_PRICE_SPEED_TYPE | Assuming the gas price oracle responds with the following JSON structure: `{"fast": 20.0, "block_time": 12.834, "health": true, "standard": 6.0, "block_number": 6470469, "instant": 71.0, "slow": 1.889}`, this parameter specifies the desirable transaction speed. The speed type can be omitted when `COMMON_HOME_GAS_PRICE_SUPPLIER_URL` is not used. | `instant` / `fast` / `standard` / `slow`
+COMMON_HOME_GAS_PRICE_FALLBACK | The gas price (in Wei) that is used if both the oracle and the fall back gas price specified in the Home Bridge contract are not available. | integer
+COMMON_HOME_GAS_PRICE_FACTOR | A value that will multiply the gas price of the oracle to convert it to gwei. If the oracle API returns gas prices in gwei then this can be set to `1`. Also, it could be used to intentionally pay more gas than suggested by the oracle to guarantee the transaction verification. E.g. `1.25` or `1.5`. | integer
+COMMON_FOREIGN_GAS_PRICE_SUPPLIER_URL | The URL used to get a JSON response from the gas price prediction oracle for the Foreign network. The provided gas price is used to send the validator's transactions to the RPC node. If the Foreign network is Ethereum Foundation mainnet, the oracle URL can be: https://gasprice.poa.network. Otherwise this parameter can be omitted. Set to `gas-price-oracle` if you want to use npm `gas-price-oracle` package for retrieving gas price from multiple sources. | URL
+COMMON_FOREIGN_GAS_PRICE_SPEED_TYPE | Assuming the gas price oracle responds with the following JSON structure: `{"fast": 20.0, "block_time": 12.834, "health": true, "standard": 6.0, "block_number": 6470469, "instant": 71.0, "slow": 1.889}`, this parameter specifies the desirable transaction speed. The speed type can be omitted when `COMMON_FOREIGN_GAS_PRICE_SUPPLIER_URL`is not used. | `instant` / `fast` / `standard` / `slow`
+COMMON_FOREIGN_GAS_PRICE_FALLBACK | The gas price (in Wei) used if both the oracle and fall back gas price specified in the Foreign Bridge contract are not available. | integer
+COMMON_FOREIGN_GAS_PRICE_FACTOR | A value that will multiply the gas price of the oracle to convert it to gwei. If the oracle API returns gas prices in gwei then this can be set to `1`. Also, it could be used to intentionally pay more gas than suggested by the oracle to guarantee the transaction verification. E.g. `1.25` or `1.5`. | integer
+
+
+## Oracle configuration
+
+name | description | value
+--- | --- | ---
+ORACLE_BRIDGE_MODE | The bridge mode. The bridge starts listening to a different set of events based on this parameter. | NATIVE_TO_ERC / ERC_TO_ERC / ERC_TO_NATIVE
+ORACLE_ALLOW_HTTP_FOR_RPC | **Only use in test environments - must be omitted in production environments.**. If this parameter is specified and set to `yes`, RPC URLs can be specified in form of HTTP links. A warning that the connection is insecure will be written to the logs. | `yes` / `no`
+ORACLE_HOME_RPC_POLLING_INTERVAL | The interval in milliseconds used to request the RPC node in the Home network for new blocks. The interval should match the average production time for a new block. | integer
+ORACLE_FOREIGN_RPC_POLLING_INTERVAL | The interval in milliseconds used to request the RPC node in the Foreign network for new blocks. The interval should match the average production time for a new block. | integer
+ORACLE_HOME_GAS_PRICE_UPDATE_INTERVAL | An interval in milliseconds used to get the updated gas price value either from the oracle or from the Home Bridge contract. | integer
+ORACLE_FOREIGN_GAS_PRICE_UPDATE_INTERVAL | The interval in milliseconds used to get the updated gas price value either from the oracle or from the Foreign Bridge contract. | integer
+ORACLE_QUEUE_URL | RabbitMQ URL used by watchers and senders to communicate to the message queue. Typically set to: `amqp://127.0.0.1`. | local URL
+ORACLE_REDIS_URL | Redis DB URL used by watchers and senders to communicate to the database. Typically set to: `redis://127.0.0.1:6379`. | local URL
+ORACLE_HOME_START_BLOCK | The block number in the Home network used to start watching for events when the bridge instance is run for the first time. Usually this is the same block where the Home Bridge contract is deployed. If a new validator instance is being deployed for an existing set of validators, the block number could be the latest block in the chain. | integer
+ORACLE_FOREIGN_START_BLOCK | The block number in the Foreign network used to start watching for events when the bridge instance runs for the first time. Usually this is the same block where the Foreign Bridge contract was deployed to. If a new validator instance is being deployed for an existing set of validators, the block number could be the latest block in the chain. | integer
+ORACLE_LOG_LEVEL | Set the level of details in the logs. | `trace` / `debug` / `info` / `warn` / `error` / `fatal`
+ORACLE_MAX_PROCESSING_TIME | The workers processes will be killed if this amount of time (in milliseconds) is elapsed before they finish processing. It is recommended to set this value to 4 times the value of the longest polling time (set with the `HOME_POLLING_INTERVAL` and `FOREIGN_POLLING_INTERVAL` variables). To disable this, set the time to 0. | integer
+ORACLE_VALIDATOR_ADDRESS_PRIVATE_KEY | The private key of the bridge validator used to sign confirmations before sending transactions to the bridge contracts. The validator account is calculated automatically from the private key. Every bridge instance (set of watchers and senders) must have its own unique private key. The specified private key is used to sign transactions on both sides of the bridge. | hexidecimal without "0x"
+ORACLE_VALIDATOR_ADDRESS | The public address of the bridge validator | hexidecimal with "0x"
+ORACLE_TX_REDUNDANCY | If set to `true`, instructs oracle to send `eth_sendRawTransaction` requests through all available RPC urls defined in `COMMON_HOME_RPC_URL` and `COMMON_FOREIGN_RPC_URL` variables instead of using first available one
+
+
+## UI configuration
+
+name | description | value
+--- | --- | ---
+UI_TITLE | The title for the bridge UI page. `%c` will be replaced by the name of the network. | string
+UI_OG_TITLE | The meta title for the deployed bridge page. | string
+UI_DESCRIPTION | The meta description for the deployed bridge page. | string
+UI_NATIVE_TOKEN_DISPLAY_NAME | name of the home native coin | string
+UI_HOME_NETWORK_DISPLAY_NAME | name to be displayed for home network | string
+UI_FOREIGN_NETWORK_DISPLAY_NAME | name to be displayed for foreign network | string
+UI_HOME_WITHOUT_EVENTS | `true` if home network doesn't support events | true/false
+UI_FOREIGN_WITHOUT_EVENTS | `true` if foreign network doesn't support events | true/false
+UI_HOME_EXPLORER_TX_TEMPLATE | template link to transaction on home explorer. `%s` will be replaced by transaction hash | URL template
+UI_FOREIGN_EXPLORER_TX_TEMPLATE | template link to transaction on foreign explorer. `%s` will be replaced by transaction hash | URL template
+UI_HOME_EXPLORER_ADDRESS_TEMPLATE | template link to address on home explorer. `%s` will be replaced by address | URL template
+UI_FOREIGN_EXPLORER_ADDRESS_TEMPLATE | template link to address on foreign explorer. `%s` will be replaced by address | URL template
+UI_HOME_GAS_PRICE_UPDATE_INTERVAL | An interval in milliseconds used to get the updated gas price value either from the oracle or from the Home Bridge contract. | integer
+UI_FOREIGN_GAS_PRICE_UPDATE_INTERVAL | An interval in milliseconds used to get the updated gas price value either from the oracle or from the Foreign Bridge contract. | integer
+UI_PORT | The port for the UI app. | integer
+UI_STYLES | The set of styles to render the bridge UI page. | core/classic/stake
+UI_PUBLIC_URL | The public url for the deployed bridge page | string
+
+
+## Monitor configuration
+
+name | description | value
+--- | --- | ---
+MONITOR_HOME_START_BLOCK | The app will monitor transactions starting from this block. | integer
+MONITOR_FOREIGN_START_BLOCK | The app will monitor transactions starting from this block. | integer
+MONITOR_VALIDATOR_HOME_TX_LIMIT | Average gas usage of a transaction sent by a validator, it is used to estimate the number of transaction that can be paid by the validator. | integer
+MONITOR_VALIDATOR_FOREIGN_TX_LIMIT | Average gas usage of a transaction sent by a validator, it is used to estimate the number of transaction that can be paid by the validator. | integer
+MONITOR_TX_NUMBER_THRESHOLD | If estimated number of transaction is equal to or below this value, the monitor will report that the validator has less funds than it is required. | integer
+MONITOR_PORT | The port for the Monitor. | integer
+MONITOR_BRIDGE_NAME | The name to be used in the url path for the bridge | string
+MONITOR_CACHE_EVENTS | If set to true, monitor will cache obtained events for other workers runs

Dockerfile.e2e

@@ -1,14 +1,32 @@
+FROM node:10 as contracts
+
+WORKDIR /mono
+
+COPY contracts/package.json contracts/package-lock.json ./contracts/
+
+WORKDIR /mono/contracts
+RUN npm install --only=prod
+
+COPY ./contracts/truffle-config.js ./
+COPY ./contracts/contracts ./contracts
+RUN npm run compile
+
 FROM node:10
 
 WORKDIR /mono
 COPY package.json .
+COPY --from=contracts /mono/contracts/build ./contracts/build
+COPY commons/package.json ./commons/
 COPY oracle-e2e/package.json ./oracle-e2e/
-COPY contracts/package.json ./contracts/
+COPY monitor-e2e/package.json ./monitor-e2e/
 
 COPY yarn.lock .
-RUN yarn install --frozen-lockfile
-COPY ./contracts ./contracts
-RUN yarn install:deploy
-RUN yarn compile:contracts
+RUN NOYARNPOSTINSTALL=1 yarn install --frozen-lockfile --production
 
-COPY . .
+COPY ./contracts/deploy ./contracts/deploy
+RUN yarn install:deploy
+
+COPY commons/ ./commons/
+COPY oracle-e2e/ ./oracle-e2e/
+COPY monitor-e2e/ ./monitor-e2e/
+COPY e2e-commons/ ./e2e-commons/

README.md

@@ -1,4 +1,4 @@
-[![CircleCI](https://circleci.com/gh/poanetwork/tokenbridge.svg?style=svg)](https://circleci.com/gh/poanetwork/tokenbridge)
+![tokenbridge](https://github.com/poanetwork/tokenbridge/workflows/tokenbridge/badge.svg?branch=master)
 [![Gitter](https://badges.gitter.im/poanetwork/poa-bridge.svg)](https://gitter.im/poanetwork/poa-bridge?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![License: LGPL v3.0](https://img.shields.io/badge/License-LGPL%20v3-blue.svg)](https://www.gnu.org/licenses/lgpl-3.0)
 
@@ -26,10 +26,13 @@ Sub-repositories maintained within this monorepo are listed below.
 | [Oracle-E2E](oracle-e2e/README.md) | End to end tests for the Oracle |
 | [Monitor-E2E](monitor-e2e/README.md) | End to end tests for the Monitor |
 | [UI-E2E](ui-e2e/README.md) | End to end tests for the UI |
+| [Deployment-E2E](deployment-e2e/README.md) | End to end tests for the Deployment |
 | [Commons](commons/README.md) | Interfaces, constants and utilities shared between the sub-repositories |
 | [E2E-Commons](e2e-commons/README.md) | Common utilities and configuration used in end to end tests |
+| [ALM](alm/README.md) | DApp interface tool for AMB Live Monitoring |
+| [Burner-wallet-plugin](burner-wallet-plugin/README.md) | TokenBridge Burner Wallet 2 Plugin |
 
-Additionally there are [Smart Contracts](https://github.com/poanetwork/poa-bridge-contracts) used to manage bridge validators, collect signatures, and confirm asset relay and disposal.
+Additionally there are [Smart Contracts](https://github.com/poanetwork/tokenbridge-contracts) used to manage bridge validators, collect signatures, and confirm asset relay and disposal.
 
 ## Available deployments
 
@@ -51,11 +54,12 @@ Additionally there are [Smart Contracts](https://github.com/poanetwork/poa-bridg
 
 ## Operational Modes
 
-The POA TokenBridge provides three operational modes:
+The POA TokenBridge provides four operational modes:
 
 - [x] `Native-to-ERC20` **Coins** on a Home network can be converted to ERC20-compatible **tokens** on a Foreign network. Coins are locked on the Home side and the corresponding amount of ERC20 tokens are minted on the Foreign side. When the operation is reversed, tokens are burnt on the Foreign side and unlocked in the Home network. **More Information: [POA-to-POA20 Bridge](https://medium.com/poa-network/introducing-poa-bridge-and-poa20-55d8b78058ac)**
 - [x] `ERC20-to-ERC20` ERC20-compatible tokens on the Foreign network are locked and minted as ERC20-compatible tokens (ERC677 tokens) on the Home network. When transferred from Home to Foreign, they are burnt on the Home side and unlocked in the Foreign network. This can be considered a form of atomic swap when a user swaps the token "X" in network "A" to the token "Y" in network "B". **More Information: [ERC20-to-ERC20](https://medium.com/poa-network/introducing-the-erc20-to-erc20-tokenbridge-ce266cc1a2d0)**
 - [x] `ERC20-to-Native`: Pre-existing **tokens** in the Foreign network are locked and **coins** are minted in the `Home` network. In this mode, the Home network consensus engine invokes [Parity's Block Reward contract](https://wiki.parity.io/Block-Reward-Contract.html) to mint coins per the bridge contract request. **More Information: [xDai Chain](https://medium.com/poa-network/poa-network-partners-with-makerdao-on-xdai-chain-the-first-ever-usd-stable-blockchain-65a078c41e6a)**
+- [x] `Arbitrary-Message`: Transfer arbitrary data between two networks as so the data could be interpreted as an arbitrary contract method invocation.
 
 ## Initializing the monorepository
 
@@ -64,11 +68,13 @@ Clone the repository:
 git clone https://github.com/poanetwork/tokenbridge
 ```
 
-Initialize submodules, install dependencies, compile the Smart Contracts:
+If there is no need to build docker images for the TokenBridge components (oracle, monitor, UI), initialize submodules, install dependencies, compile the Smart Contracts:
 ```
 yarn initialize
 ```
 
+Then refer to the corresponding README files to get information about particular TokenBridge component.
+
 ## Linting
 
 Running linter for all JS projects:
@@ -85,13 +91,14 @@ Running tests for all projects:
 yarn test
 ```
 
-Additionaly there are end-to-end tests for [Oracle](oracle-e2e/README.md) and [UI](ui-e2e/README.md).
+Additionally there are end-to-end tests for [Oracle](oracle-e2e/README.md) and [UI](ui-e2e/README.md).
 
 For details on building, running and developing please refer to respective READMEs in sub-repositories.
 
 ## Building, running and deploying
 
 Please refer to the instructions in sub-directories.
+Configuration details are available [here](./CONFIGURATION.md).
 
 ## Contributing
 
@@ -103,5 +110,4 @@ This project is licensed under the GNU Lesser General Public License v3.0. See t
 
 ## References
 
-* [Additional Documentation](https://forum.poa.network/c/tokenbridge)
-* [POA20 Bridge FAQ](https://forum.poa.network/c/tokenbridge/poa20-bridge)
+* [TokenBridge Documentation](https://docs.tokenbridge.net/)

alm-e2e/.eslintrc

@@ -0,0 +1,15 @@
+{
+  "extends": [
+    "plugin:node/recommended",
+    "airbnb-base",
+    "../.eslintrc"
+  ],
+  "plugins": ["node", "jest"],
+  "env": {
+    "jest/globals": true
+  },
+  "globals": {
+    "page": true,
+    "browser": true
+  }
+}

alm-e2e/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "alm-e2e",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "test": "jest --detectOpenHandles",
+    "lint": "eslint . --ignore-path ../.eslintignore",
+    "lint:fix": "eslint . --fix"
+  },
+  "dependencies": {
+    "jest": "24.7.1",
+    "jest-puppeteer": "^4.4.0",
+    "puppeteer": "^5.2.1"
+  },
+  "jest": {
+    "preset": "jest-puppeteer"
+  },
+  "devDependencies": {
+    "eslint-plugin-jest": "^23.18.0"
+  },
+  "engines": {
+    "node": ">= 8.9"
+  }
+}

alm-e2e/run-tests.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+cd $(dirname $0)
+
+../e2e-commons/up.sh deploy blocks alm alm-e2e
+
+# run oracle amb e2e tests to generate transactions for alm
+docker-compose -f ../e2e-commons/docker-compose.yml run e2e yarn workspace oracle-e2e run alm
+
+yarn test
+rc=$?
+
+../e2e-commons/down.sh
+exit $rc

alm-e2e/src/test.js

@@ -0,0 +1,50 @@
+const puppeteer = require('puppeteer')
+const { waitUntil } = require('./utils/utils')
+
+jest.setTimeout(60000)
+
+const statusText = 'Success'
+const statusSelector = 'label[data-id="status"]'
+
+const homeToForeignTxURL = 'http://localhost:3004/77/0x58e7d63368335b9591d4dbb43889084f698fcee93ab7656fd7a39d8c66bc4b60'
+const foreignToHomeTxURL = 'http://localhost:3004/42/0x592bf28fc896419d2838f71cd0388775814b692688f1ecd5b1519081566b994a'
+
+describe('ALM', () => {
+  let browser
+  let page
+
+  beforeAll(async () => {
+    browser = await puppeteer.launch()
+    page = await browser.newPage()
+  })
+
+  afterAll(async () => {
+    await browser.close()
+  })
+
+  it('should be titled "AMB Live Monitoring"', async () => {
+    await page.goto(foreignToHomeTxURL)
+
+    await expect(page.title()).resolves.toMatch('AMB Live Monitoring')
+  })
+  it('should display information of foreign to home transaction', async () => {
+    await page.goto(foreignToHomeTxURL)
+
+    await page.waitForSelector(statusSelector)
+    await waitUntil(async () => {
+      const element = await page.$(statusSelector)
+      const text = await page.evaluate(element => element.textContent, element)
+      return text === statusText
+    })
+  })
+  it('should display information of home to foreign transaction', async () => {
+    await page.goto(homeToForeignTxURL)
+
+    await page.waitForSelector(statusSelector)
+    await waitUntil(async () => {
+      const element = await page.$(statusSelector)
+      const text = await page.evaluate(element => element.textContent, element)
+      return text === statusText
+    })
+  })
+})

alm-e2e/src/utils/utils.js

@@ -0,0 +1,15 @@
+const waitUntil = async (predicate, step = 100, timeout = 20000) => {
+  const stopTime = Date.now() + timeout
+  while (Date.now() <= stopTime) {
+    const result = await predicate()
+    if (result) {
+      return result
+    }
+    await new Promise(resolve => setTimeout(resolve, step)) // sleep
+  }
+  throw new Error(`waitUntil timed out after ${timeout} ms`)
+}
+
+module.exports = {
+  waitUntil
+}

alm/.env.example

@@ -0,0 +1,15 @@
+COMMON_HOME_BRIDGE_ADDRESS=0xFe446bEF1DbF7AFE24E81e05BC8B271C1BA9a560
+COMMON_FOREIGN_BRIDGE_ADDRESS=0xFe446bEF1DbF7AFE24E81e05BC8B271C1BA9a560
+
+COMMON_HOME_RPC_URL=https://sokol.poa.network
+COMMON_FOREIGN_RPC_URL=https://kovan.infura.io/v3/
+
+ALM_HOME_NETWORK_NAME=Sokol Testnet
+ALM_FOREIGN_NETWORK_NAME=Kovan Testnet
+
+ALM_HOME_EXPLORER_TX_TEMPLATE=https://blockscout.com/poa/sokol/tx/%s
+ALM_FOREIGN_EXPLORER_TX_TEMPLATE=https://blockscout.com/eth/kovan/tx/%s
+
+ALM_HOME_EXPLORER_API=https://blockscout.com/poa/sokol/api
+ALM_FOREIGN_EXPLORER_API=https://kovan.etherscan.io/api?apikey=YourApiKeyToken
+PORT=8080

alm/.eslintrc.js

@@ -0,0 +1,6 @@
+module.exports = {
+  extends: [
+    "react-app",
+    "../.eslintrc"
+  ]
+}

alm/.gitignore

@@ -0,0 +1,25 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+src/snapshots/*.json
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

alm/Dockerfile

@@ -0,0 +1,38 @@
+FROM node:10 as contracts
+
+WORKDIR /mono
+
+COPY contracts/package.json contracts/package-lock.json ./contracts/
+
+WORKDIR /mono/contracts
+RUN npm install --only=prod
+
+COPY ./contracts/truffle-config.js ./
+COPY ./contracts/contracts ./contracts
+RUN npm run compile
+
+FROM node:12 as alm-builder
+
+WORKDIR /mono
+COPY package.json .
+COPY --from=contracts /mono/contracts/build ./contracts/build
+COPY commons/package.json ./commons/
+COPY alm/package.json ./alm/
+COPY yarn.lock .
+RUN NOYARNPOSTINSTALL=1 yarn install --frozen-lockfile --production
+
+COPY ./commons ./commons
+COPY ./alm ./alm
+
+ARG DOT_ENV_PATH=./alm/.env
+COPY ${DOT_ENV_PATH} ./alm/.env
+
+WORKDIR /mono/alm
+RUN yarn run build
+
+
+FROM node:12 as alm-production
+RUN yarn global add serve
+WORKDIR /app
+COPY --from=alm-builder /mono/alm/build .
+CMD serve -p $PORT -s .

alm/README.md

@@ -0,0 +1,46 @@
+# AMB Live Monitoring
+
+This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+
+## Available Scripts
+
+In the project directory, you can run:
+
+### `yarn start`
+
+Runs the app in the development mode.<br />
+Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
+
+The page will reload if you make edits.<br />
+You will also see any lint errors in the console.
+
+### `yarn test`
+
+Launches the test runner in the interactive watch mode.<br />
+See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
+
+### `yarn build`
+
+Builds the app for production to the `build` folder.<br />
+It correctly bundles React in production mode and optimizes the build for the best performance.
+
+The build is minified and the filenames include the hashes.<br />
+Your app is ready to be deployed!
+
+See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
+
+### `yarn eject`
+
+**Note: this is a one-way operation. Once you `eject`, you can’t go back!**
+
+If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
+
+Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
+
+You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
+
+## Learn More
+
+You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
+
+To learn React, check out the [React documentation](https://reactjs.org/).

alm/config-overrides.js

@@ -0,0 +1,9 @@
+const { override, disableEsLint } = require('customize-cra')
+const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin')
+
+const disableModuleScopePlugin = () => config => {
+  config.resolve.plugins = config.resolve.plugins.filter(plugin => !(plugin instanceof ModuleScopePlugin))
+  return config
+}
+
+module.exports = override(disableEsLint(), disableModuleScopePlugin())

alm/docker-compose.yml

@@ -0,0 +1,14 @@
+---
+version: '2.4'
+services:
+  alm:
+    build:
+      context: ..
+      dockerfile: alm/Dockerfile
+    ports:
+      - "${PORT}:${PORT}"
+    env_file: ./.env
+    environment: 
+      - NODE_ENV=production
+    restart: unless-stopped
+    entrypoint: serve -p ${PORT} -s .

alm/load-env.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+while read line; do
+  if [ "$line" = "" ]; then
+    : # Skip empty lines
+  elif [[ "$line" =~ \#.* ]]; then
+    : # Skip comment lines
+  elif [[ "$line" =~ "UI_PORT"* ]]; then
+    eval $line
+    export PORT="$UI_PORT"
+  else
+    export "REACT_APP_$line"
+  fi
+done < '.env'
+
+$*

alm/package.json

@@ -0,0 +1,59 @@
+{
+  "name": "alm",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "@react-hook/window-size": "^3.0.6",
+    "@testing-library/jest-dom": "^4.2.4",
+    "@testing-library/react": "^9.3.2",
+    "@testing-library/user-event": "^7.1.2",
+    "@types/jest": "^24.0.0",
+    "@types/node": "^12.0.0",
+    "@types/promise-retry": "^1.1.3",
+    "@types/react": "^16.9.0",
+    "@types/react-dom": "^16.9.0",
+    "@types/react-router-dom": "^5.1.5",
+    "@types/styled-components": "^5.1.0",
+    "@use-it/interval": "^0.1.3",
+    "customize-cra": "^1.0.0",
+    "date-fns": "^2.14.0",
+    "dotenv": "^8.2.0",
+    "fast-memoize": "^2.5.2",
+    "promise-retry": "^2.0.1",
+    "react": "^16.13.1",
+    "react-app-rewired": "^2.1.6",
+    "react-dom": "^16.13.1",
+    "react-router-dom": "^5.2.0",
+    "react-scripts": "3.0.1",
+    "styled-components": "^5.1.1",
+    "typescript": "^3.5.2",
+    "web3": "1.2.7",
+    "web3-eth-contract": "1.2.7"
+  },
+  "scripts": {
+    "start": "yarn createSnapshots && ./load-env.sh react-app-rewired start",
+    "build": "yarn createSnapshots && ./load-env.sh react-app-rewired build",
+    "test": "react-app-rewired test",
+    "eject": "react-app-rewired eject",
+    "lint": "eslint '*/**/*.{js,ts,tsx}' --ignore-path ../.eslintignore",
+    "createSnapshots": "node scripts/createSnapshots.js"
+  },
+  "eslintConfig": {
+    "extends": "react-app"
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  },
+  "devDependencies": {
+    "eslint-plugin-prettier": "^3.1.3"
+  }
+}

alm/public/index.html

@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="AMB Live Monitoring"
+    />
+    <link rel="stylesheet" href="https://unpkg.com/chota@latest">
+    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
+    <!--
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <link href="https://fonts.googleapis.com/css?family=Roboto:300,400,700" rel="stylesheet">
+    <title>AMB Live Monitoring</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>

alm/public/manifest.json

@@ -0,0 +1,15 @@
+{
+  "short_name": "ALM",
+  "name": "AMB Live Monitoring",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}

alm/public/robots.txt

@@ -0,0 +1,3 @@
+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:

alm/scripts/createSnapshots.js

@@ -0,0 +1,118 @@
+const { BRIDGE_VALIDATORS_ABI, HOME_AMB_ABI } = require('commons')
+
+const path = require('path')
+require('dotenv').config()
+const Web3 = require('web3')
+
+const fs = require('fs')
+
+const {
+  COMMON_HOME_RPC_URL,
+  COMMON_HOME_BRIDGE_ADDRESS,
+  COMMON_FOREIGN_RPC_URL,
+  COMMON_FOREIGN_BRIDGE_ADDRESS
+} = process.env
+
+const generateSnapshot = async (side, url, bridgeAddress) => {
+  const snapshotPath = `../src/snapshots/${side}.json`
+  const snapshotFullPath = path.join(__dirname, snapshotPath)
+  const snapshot = {}
+
+  const web3 = new Web3(new Web3.providers.HttpProvider(url))
+
+  const currentBlockNumber = await web3.eth.getBlockNumber()
+  snapshot.snapshotBlockNumber = currentBlockNumber
+
+  // Save chainId
+  snapshot.chainId = await web3.eth.getChainId()
+
+  const bridgeContract = new web3.eth.Contract(HOME_AMB_ABI, bridgeAddress)
+
+  // Save RequiredBlockConfirmationChanged events
+  let requiredBlockConfirmationChangedEvents = await bridgeContract.getPastEvents('RequiredBlockConfirmationChanged', {
+    fromBlock: 0,
+    toBlock: currentBlockNumber
+  })
+
+  // In case RequiredBlockConfirmationChanged was not emitted during initialization in early versions of AMB
+  // manually generate an event for this. Example Sokol - Kovan bridge
+  if (requiredBlockConfirmationChangedEvents.length === 0) {
+    const deployedAtBlock = await bridgeContract.methods.deployedAtBlock().call()
+    const blockConfirmations = await bridgeContract.methods.requiredBlockConfirmations().call()
+
+    requiredBlockConfirmationChangedEvents.push({
+      blockNumber: parseInt(deployedAtBlock),
+      returnValues: {
+        requiredBlockConfirmations: blockConfirmations
+      }
+    })
+  }
+
+  snapshot.RequiredBlockConfirmationChanged = requiredBlockConfirmationChangedEvents.map(e => ({
+    blockNumber: e.blockNumber,
+    returnValues: {
+      requiredBlockConfirmations: e.returnValues.requiredBlockConfirmations
+    }
+  }))
+
+  const validatorAddress = await bridgeContract.methods.validatorContract().call()
+  const validatorContract = new web3.eth.Contract(BRIDGE_VALIDATORS_ABI, validatorAddress)
+
+  // Save RequiredSignaturesChanged events
+  const RequiredSignaturesChangedEvents = await validatorContract.getPastEvents('RequiredSignaturesChanged', {
+    fromBlock: 0,
+    toBlock: currentBlockNumber
+  })
+  snapshot.RequiredSignaturesChanged = RequiredSignaturesChangedEvents.map(e => ({
+    blockNumber: e.blockNumber,
+    returnValues: {
+      requiredSignatures: e.returnValues.requiredSignatures
+    }
+  }))
+
+  // Save ValidatorAdded events
+  const validatorAddedEvents = await validatorContract.getPastEvents('ValidatorAdded', {
+    fromBlock: 0,
+    toBlock: currentBlockNumber
+  })
+
+  snapshot.ValidatorAdded = validatorAddedEvents.map(e => ({
+    blockNumber: e.blockNumber,
+    returnValues: {
+      validator: e.returnValues.validator
+    },
+    event: 'ValidatorAdded'
+  }))
+
+  // Save ValidatorRemoved events
+  const validatorRemovedEvents = await validatorContract.getPastEvents('ValidatorRemoved', {
+    fromBlock: 0,
+    toBlock: currentBlockNumber
+  })
+
+  snapshot.ValidatorRemoved = validatorRemovedEvents.map(e => ({
+    blockNumber: e.blockNumber,
+    returnValues: {
+      validator: e.returnValues.validator
+    },
+    event: 'ValidatorRemoved'
+  }))
+
+  // Write snapshot
+  fs.writeFileSync(snapshotFullPath, JSON.stringify(snapshot, null, 2))
+}
+
+const main = async () => {
+  await Promise.all([
+    generateSnapshot('home', COMMON_HOME_RPC_URL, COMMON_HOME_BRIDGE_ADDRESS),
+    generateSnapshot('foreign', COMMON_FOREIGN_RPC_URL, COMMON_FOREIGN_BRIDGE_ADDRESS)
+  ])
+}
+
+main()
+  .then(() => process.exit(0))
+  .catch(error => {
+    console.log('Error while creating snapshots')
+    console.error(error)
+    process.exit(0)
+  })

alm/src/App.tsx

@@ -0,0 +1,16 @@
+import React from 'react'
+import { BrowserRouter } from 'react-router-dom'
+import { MainPage } from './components/MainPage'
+import { StateProvider } from './state/StateProvider'
+
+function App() {
+  return (
+    <BrowserRouter>
+      <StateProvider>
+        <MainPage />
+      </StateProvider>
+    </BrowserRouter>
+  )
+}
+
+export default App

alm/src/abis/BridgeValidators.ts

@@ -0,0 +1,319 @@
+import { AbiItem } from 'web3-utils'
+
+const abi: AbiItem[] = [
+  {
+    constant: true,
+    inputs: [],
+    name: 'validatorCount',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'getBridgeValidatorsInterfacesVersion',
+    outputs: [
+      {
+        name: 'major',
+        type: 'uint64'
+      },
+      {
+        name: 'minor',
+        type: 'uint64'
+      },
+      {
+        name: 'patch',
+        type: 'uint64'
+      }
+    ],
+    payable: false,
+    stateMutability: 'pure',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'isInitialized',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'validatorList',
+    outputs: [
+      {
+        name: '',
+        type: 'address[]'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_requiredSignatures',
+        type: 'uint256'
+      }
+    ],
+    name: 'setRequiredSignatures',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'requiredSignatures',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_address',
+        type: 'address'
+      }
+    ],
+    name: 'getNextValidator',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'owner',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_validator',
+        type: 'address'
+      }
+    ],
+    name: 'isValidatorDuty',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'deployedAtBlock',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'F_ADDR',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: 'newOwner',
+        type: 'address'
+      }
+    ],
+    name: 'transferOwnership',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_validator',
+        type: 'address'
+      }
+    ],
+    name: 'isValidator',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        name: 'validator',
+        type: 'address'
+      }
+    ],
+    name: 'ValidatorAdded',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        name: 'validator',
+        type: 'address'
+      }
+    ],
+    name: 'ValidatorRemoved',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'requiredSignatures',
+        type: 'uint256'
+      }
+    ],
+    name: 'RequiredSignaturesChanged',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'previousOwner',
+        type: 'address'
+      },
+      {
+        indexed: false,
+        name: 'newOwner',
+        type: 'address'
+      }
+    ],
+    name: 'OwnershipTransferred',
+    type: 'event'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_requiredSignatures',
+        type: 'uint256'
+      },
+      {
+        name: '_initialValidators',
+        type: 'address[]'
+      },
+      {
+        name: '_owner',
+        type: 'address'
+      }
+    ],
+    name: 'initialize',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_validator',
+        type: 'address'
+      }
+    ],
+    name: 'addValidator',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_validator',
+        type: 'address'
+      }
+    ],
+    name: 'removeValidator',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  }
+]
+
+export default abi

alm/src/abis/ForeignAMB.ts

@@ -0,0 +1,589 @@
+import { AbiItem } from 'web3-utils'
+
+const abi: AbiItem[] = [
+  {
+    constant: true,
+    inputs: [],
+    name: 'transactionHash',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_txHash',
+        type: 'bytes32'
+      }
+    ],
+    name: 'relayedMessages',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_sourceChainId',
+        type: 'uint256'
+      },
+      {
+        name: '_destinationChainId',
+        type: 'uint256'
+      },
+      {
+        name: '_validatorContract',
+        type: 'address'
+      },
+      {
+        name: '_maxGasPerTx',
+        type: 'uint256'
+      },
+      {
+        name: '_gasPrice',
+        type: 'uint256'
+      },
+      {
+        name: '_requiredBlockConfirmations',
+        type: 'uint256'
+      },
+      {
+        name: '_owner',
+        type: 'address'
+      }
+    ],
+    name: 'initialize',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'isInitialized',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'requiredBlockConfirmations',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_data',
+        type: 'bytes'
+      },
+      {
+        name: '_signatures',
+        type: 'bytes'
+      }
+    ],
+    name: 'executeSignatures',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_data',
+        type: 'bytes'
+      }
+    ],
+    name: 'getMinimumGasUsage',
+    outputs: [
+      {
+        name: 'gas',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'pure',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_messageId',
+        type: 'bytes32'
+      }
+    ],
+    name: 'failedMessageReceiver',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'getBridgeMode',
+    outputs: [
+      {
+        name: '_data',
+        type: 'bytes4'
+      }
+    ],
+    payable: false,
+    stateMutability: 'pure',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_sourceChainId',
+        type: 'uint256'
+      },
+      {
+        name: '_destinationChainId',
+        type: 'uint256'
+      }
+    ],
+    name: 'setChainIds',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_messageId',
+        type: 'bytes32'
+      }
+    ],
+    name: 'failedMessageSender',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'messageId',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_token',
+        type: 'address'
+      },
+      {
+        name: '_to',
+        type: 'address'
+      }
+    ],
+    name: 'claimTokens',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_maxGasPerTx',
+        type: 'uint256'
+      }
+    ],
+    name: 'setMaxGasPerTx',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'requiredSignatures',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'owner',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'validatorContract',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'deployedAtBlock',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'getBridgeInterfacesVersion',
+    outputs: [
+      {
+        name: 'major',
+        type: 'uint64'
+      },
+      {
+        name: 'minor',
+        type: 'uint64'
+      },
+      {
+        name: 'patch',
+        type: 'uint64'
+      }
+    ],
+    payable: false,
+    stateMutability: 'pure',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'messageSourceChainId',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_blockConfirmations',
+        type: 'uint256'
+      }
+    ],
+    name: 'setRequiredBlockConfirmations',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_gasPrice',
+        type: 'uint256'
+      }
+    ],
+    name: 'setGasPrice',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_messageId',
+        type: 'bytes32'
+      }
+    ],
+    name: 'messageCallStatus',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'messageSender',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_contract',
+        type: 'address'
+      },
+      {
+        name: '_data',
+        type: 'bytes'
+      },
+      {
+        name: '_gas',
+        type: 'uint256'
+      }
+    ],
+    name: 'requireToPassMessage',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_messageId',
+        type: 'bytes32'
+      }
+    ],
+    name: 'failedMessageDataHash',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'maxGasPerTx',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: 'newOwner',
+        type: 'address'
+      }
+    ],
+    name: 'transferOwnership',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'gasPrice',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        name: 'messageId',
+        type: 'bytes32'
+      },
+      {
+        indexed: false,
+        name: 'encodedData',
+        type: 'bytes'
+      }
+    ],
+    name: 'UserRequestForAffirmation',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        name: 'sender',
+        type: 'address'
+      },
+      {
+        indexed: true,
+        name: 'executor',
+        type: 'address'
+      },
+      {
+        indexed: true,
+        name: 'messageId',
+        type: 'bytes32'
+      },
+      {
+        indexed: false,
+        name: 'status',
+        type: 'bool'
+      }
+    ],
+    name: 'RelayedMessage',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'gasPrice',
+        type: 'uint256'
+      }
+    ],
+    name: 'GasPriceChanged',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'requiredBlockConfirmations',
+        type: 'uint256'
+      }
+    ],
+    name: 'RequiredBlockConfirmationChanged',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'previousOwner',
+        type: 'address'
+      },
+      {
+        indexed: false,
+        name: 'newOwner',
+        type: 'address'
+      }
+    ],
+    name: 'OwnershipTransferred',
+    type: 'event'
+  }
+]
+
+export default abi

alm/src/abis/HomeAMB.ts

@@ -0,0 +1,777 @@
+import { AbiItem } from 'web3-utils'
+
+const abi: AbiItem[] = [
+  {
+    constant: true,
+    inputs: [],
+    name: 'transactionHash',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_message',
+        type: 'bytes32'
+      }
+    ],
+    name: 'numMessagesSigned',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_hash',
+        type: 'bytes32'
+      },
+      {
+        name: '_index',
+        type: 'uint256'
+      }
+    ],
+    name: 'signature',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_sourceChainId',
+        type: 'uint256'
+      },
+      {
+        name: '_destinationChainId',
+        type: 'uint256'
+      },
+      {
+        name: '_validatorContract',
+        type: 'address'
+      },
+      {
+        name: '_maxGasPerTx',
+        type: 'uint256'
+      },
+      {
+        name: '_gasPrice',
+        type: 'uint256'
+      },
+      {
+        name: '_requiredBlockConfirmations',
+        type: 'uint256'
+      },
+      {
+        name: '_owner',
+        type: 'address'
+      }
+    ],
+    name: 'initialize',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'isInitialized',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'requiredBlockConfirmations',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_data',
+        type: 'bytes'
+      }
+    ],
+    name: 'getMinimumGasUsage',
+    outputs: [
+      {
+        name: 'gas',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'pure',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_messageId',
+        type: 'bytes32'
+      }
+    ],
+    name: 'failedMessageReceiver',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'getBridgeMode',
+    outputs: [
+      {
+        name: '_data',
+        type: 'bytes4'
+      }
+    ],
+    payable: false,
+    stateMutability: 'pure',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_sourceChainId',
+        type: 'uint256'
+      },
+      {
+        name: '_destinationChainId',
+        type: 'uint256'
+      }
+    ],
+    name: 'setChainIds',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_hash',
+        type: 'bytes32'
+      }
+    ],
+    name: 'message',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_messageId',
+        type: 'bytes32'
+      }
+    ],
+    name: 'failedMessageSender',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: 'signature',
+        type: 'bytes'
+      },
+      {
+        name: 'message',
+        type: 'bytes'
+      }
+    ],
+    name: 'submitSignature',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'messageId',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_token',
+        type: 'address'
+      },
+      {
+        name: '_to',
+        type: 'address'
+      }
+    ],
+    name: 'claimTokens',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_hash',
+        type: 'bytes32'
+      }
+    ],
+    name: 'numAffirmationsSigned',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_hash',
+        type: 'bytes32'
+      }
+    ],
+    name: 'affirmationsSigned',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_maxGasPerTx',
+        type: 'uint256'
+      }
+    ],
+    name: 'setMaxGasPerTx',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'requiredSignatures',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'owner',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_message',
+        type: 'bytes32'
+      }
+    ],
+    name: 'messagesSigned',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'validatorContract',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'deployedAtBlock',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'getBridgeInterfacesVersion',
+    outputs: [
+      {
+        name: 'major',
+        type: 'uint64'
+      },
+      {
+        name: 'minor',
+        type: 'uint64'
+      },
+      {
+        name: 'patch',
+        type: 'uint64'
+      }
+    ],
+    payable: false,
+    stateMutability: 'pure',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'messageSourceChainId',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_blockConfirmations',
+        type: 'uint256'
+      }
+    ],
+    name: 'setRequiredBlockConfirmations',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_gasPrice',
+        type: 'uint256'
+      }
+    ],
+    name: 'setGasPrice',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_messageId',
+        type: 'bytes32'
+      }
+    ],
+    name: 'messageCallStatus',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'messageSender',
+    outputs: [
+      {
+        name: '',
+        type: 'address'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '_contract',
+        type: 'address'
+      },
+      {
+        name: '_data',
+        type: 'bytes'
+      },
+      {
+        name: '_gas',
+        type: 'uint256'
+      }
+    ],
+    name: 'requireToPassMessage',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_messageId',
+        type: 'bytes32'
+      }
+    ],
+    name: 'failedMessageDataHash',
+    outputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'maxGasPerTx',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: 'message',
+        type: 'bytes'
+      }
+    ],
+    name: 'executeAffirmation',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: 'newOwner',
+        type: 'address'
+      }
+    ],
+    name: 'transferOwnership',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [],
+    name: 'gasPrice',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '_number',
+        type: 'uint256'
+      }
+    ],
+    name: 'isAlreadyProcessed',
+    outputs: [
+      {
+        name: '',
+        type: 'bool'
+      }
+    ],
+    payable: false,
+    stateMutability: 'pure',
+    type: 'function'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        name: 'messageId',
+        type: 'bytes32'
+      },
+      {
+        indexed: false,
+        name: 'encodedData',
+        type: 'bytes'
+      }
+    ],
+    name: 'UserRequestForSignature',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        name: 'sender',
+        type: 'address'
+      },
+      {
+        indexed: true,
+        name: 'executor',
+        type: 'address'
+      },
+      {
+        indexed: true,
+        name: 'messageId',
+        type: 'bytes32'
+      },
+      {
+        indexed: false,
+        name: 'status',
+        type: 'bool'
+      }
+    ],
+    name: 'AffirmationCompleted',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        name: 'signer',
+        type: 'address'
+      },
+      {
+        indexed: false,
+        name: 'messageHash',
+        type: 'bytes32'
+      }
+    ],
+    name: 'SignedForUserRequest',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        name: 'signer',
+        type: 'address'
+      },
+      {
+        indexed: false,
+        name: 'messageHash',
+        type: 'bytes32'
+      }
+    ],
+    name: 'SignedForAffirmation',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'authorityResponsibleForRelay',
+        type: 'address'
+      },
+      {
+        indexed: false,
+        name: 'messageHash',
+        type: 'bytes32'
+      },
+      {
+        indexed: false,
+        name: 'NumberOfCollectedSignatures',
+        type: 'uint256'
+      }
+    ],
+    name: 'CollectedSignatures',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'gasPrice',
+        type: 'uint256'
+      }
+    ],
+    name: 'GasPriceChanged',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'requiredBlockConfirmations',
+        type: 'uint256'
+      }
+    ],
+    name: 'RequiredBlockConfirmationChanged',
+    type: 'event'
+  },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: false,
+        name: 'previousOwner',
+        type: 'address'
+      },
+      {
+        indexed: false,
+        name: 'newOwner',
+        type: 'address'
+      }
+    ],
+    name: 'OwnershipTransferred',
+    type: 'event'
+  }
+]
+
+export default abi

alm/src/abis/index.ts

@@ -0,0 +1,3 @@
+export { default as HOME_AMB_ABI } from './HomeAMB'
+export { default as FOREIGN_AMB_ABI } from './ForeignAMB'
+export { default as BRIDGE_VALIDATORS_ABI } from './BridgeValidators'

alm/src/components/ConfirmationsContainer.tsx

@@ -0,0 +1,109 @@
+import React from 'react'
+import { TransactionReceipt } from 'web3-eth'
+import { useMessageConfirmations } from '../hooks/useMessageConfirmations'
+import { MessageObject } from '../utils/web3'
+import styled from 'styled-components'
+import { CONFIRMATIONS_STATUS } from '../config/constants'
+import { CONFIRMATIONS_STATUS_LABEL, CONFIRMATIONS_STATUS_LABEL_HOME } from '../config/descriptions'
+import { SimpleLoading } from './commons/Loading'
+import { ValidatorsConfirmations } from './ValidatorsConfirmations'
+import { getConfirmationsStatusDescription } from '../utils/networks'
+import { useStateProvider } from '../state/StateProvider'
+import { ExecutionConfirmation } from './ExecutionConfirmation'
+import { useValidatorContract } from '../hooks/useValidatorContract'
+import { useBlockConfirmations } from '../hooks/useBlockConfirmations'
+import { MultiLine } from './commons/MultiLine'
+import { ExplorerTxLink } from './commons/ExplorerTxLink'
+
+const StatusLabel = styled.label`
+  font-weight: bold;
+  font-size: 18px;
+`
+
+const StatusResultLabel = styled.label`
+  font-size: 18px;
+  padding-left: 10px;
+`
+
+const StyledConfirmationContainer = styled.div`
+  background-color: var(--bg-color);
+  padding: 10px;
+  border-radius: 4px;
+`
+
+const StatusDescription = styled.div`
+  padding-top: 10px;
+`
+
+export interface ConfirmationsContainerParams {
+  message: MessageObject
+  receipt: Maybe<TransactionReceipt>
+  fromHome: boolean
+  timestamp: number
+}
+
+export const ConfirmationsContainer = ({ message, receipt, fromHome, timestamp }: ConfirmationsContainerParams) => {
+  const {
+    home: { name: homeName },
+    foreign: { name: foreignName }
+  } = useStateProvider()
+  const { requiredSignatures, validatorList } = useValidatorContract({ fromHome, receipt })
+  const { blockConfirmations } = useBlockConfirmations({ fromHome, receipt })
+  const { confirmations, status, executionData, signatureCollected, waitingBlocksResolved } = useMessageConfirmations({
+    message,
+    receipt,
+    fromHome,
+    timestamp,
+    requiredSignatures,
+    validatorList,
+    blockConfirmations
+  })
+
+  const statusLabel = fromHome ? CONFIRMATIONS_STATUS_LABEL_HOME : CONFIRMATIONS_STATUS_LABEL
+
+  const parseDescription = () => {
+    let description = getConfirmationsStatusDescription(status, homeName, foreignName, fromHome)
+    let link
+    const descArray = description.split('%link')
+    if (descArray.length > 1) {
+      description = descArray[0]
+      link = (
+        <ExplorerTxLink href={descArray[1]} target="_blank" rel="noopener noreferrer">
+          {descArray[1]}
+        </ExplorerTxLink>
+      )
+    }
+
+    return (
+      <div>
+        {description}
+        {link}
+      </div>
+    )
+  }
+
+  return (
+    <div className="row is-center">
+      <StyledConfirmationContainer className="col-9">
+        <div className="row is-center">
+          <StatusLabel>Status:</StatusLabel>
+          <StatusResultLabel data-id="status">
+            {status !== CONFIRMATIONS_STATUS.UNDEFINED ? statusLabel[status] : <SimpleLoading />}
+          </StatusResultLabel>
+        </div>
+        <StatusDescription className="row is-center">
+          <MultiLine className="col-10">
+            {status !== CONFIRMATIONS_STATUS.UNDEFINED ? parseDescription() : ''}
+          </MultiLine>
+        </StatusDescription>
+        <ValidatorsConfirmations
+          confirmations={confirmations}
+          requiredSignatures={requiredSignatures}
+          validatorList={validatorList}
+          waitingBlocksResolved={waitingBlocksResolved}
+        />
+        {signatureCollected && <ExecutionConfirmation executionData={executionData} isHome={!fromHome} />}
+      </StyledConfirmationContainer>
+    </div>
+  )
+}

alm/src/components/ExecutionConfirmation.tsx

@@ -0,0 +1,76 @@
+import React from 'react'
+import { formatTimestamp, formatTxHash, getExplorerTxUrl } from '../utils/networks'
+import { useWindowWidth } from '@react-hook/window-size'
+import { SEARCHING_TX, VALIDATOR_CONFIRMATION_STATUS } from '../config/constants'
+import { SimpleLoading } from './commons/Loading'
+import styled from 'styled-components'
+import { ExecutionData } from '../hooks/useMessageConfirmations'
+import { GreyLabel, RedLabel, SuccessLabel } from './commons/Labels'
+import { ExplorerTxLink } from './commons/ExplorerTxLink'
+import { Thead, AgeTd, StatusTd } from './commons/Table'
+
+const StyledExecutionConfirmation = styled.div`
+  margin-top: 30px;
+`
+
+export interface ExecutionConfirmationParams {
+  executionData: ExecutionData
+  isHome: boolean
+}
+
+export const ExecutionConfirmation = ({ executionData, isHome }: ExecutionConfirmationParams) => {
+  const windowWidth = useWindowWidth()
+
+  const txExplorerLink = getExplorerTxUrl(executionData.txHash, isHome)
+  const formattedValidator =
+    windowWidth < 850 && executionData.validator ? formatTxHash(executionData.validator) : executionData.validator
+
+  const getExecutionStatusElement = (validatorStatus = '') => {
+    switch (validatorStatus) {
+      case VALIDATOR_CONFIRMATION_STATUS.SUCCESS:
+        return <SuccessLabel>{validatorStatus}</SuccessLabel>
+      case VALIDATOR_CONFIRMATION_STATUS.FAILED:
+        return <RedLabel>{validatorStatus}</RedLabel>
+      case VALIDATOR_CONFIRMATION_STATUS.PENDING:
+      case VALIDATOR_CONFIRMATION_STATUS.WAITING:
+        return <GreyLabel>{validatorStatus}</GreyLabel>
+      default:
+        return executionData.validator ? (
+          <GreyLabel>{VALIDATOR_CONFIRMATION_STATUS.WAITING}</GreyLabel>
+        ) : (
+          <SimpleLoading />
+        )
+    }
+  }
+
+  return (
+    <StyledExecutionConfirmation>
+      <table>
+        <Thead>
+          <tr>
+            <th>Executed by</th>
+            <th className="text-center">Status</th>
+            <th className="text-center">Age</th>
+          </tr>
+        </Thead>
+        <tbody>
+          <tr>
+            <td>{formattedValidator ? formattedValidator : <SimpleLoading />}</td>
+            <StatusTd className="text-center">{getExecutionStatusElement(executionData.status)}</StatusTd>
+            <AgeTd className="text-center">
+              {executionData.timestamp > 0 ? (
+                <ExplorerTxLink href={txExplorerLink} target="_blank">
+                  {formatTimestamp(executionData.timestamp)}
+                </ExplorerTxLink>
+              ) : executionData.status === VALIDATOR_CONFIRMATION_STATUS.WAITING ? (
+                ''
+              ) : (
+                SEARCHING_TX
+              )}
+            </AgeTd>
+          </tr>
+        </tbody>
+      </table>
+    </StyledExecutionConfirmation>
+  )
+}

alm/src/components/Form.tsx

@@ -0,0 +1,69 @@
+import React, { useState, FormEvent } from 'react'
+import styled from 'styled-components'
+import { FormSubmitParams } from './MainPage'
+import { Button } from './commons/Button'
+import { TransactionSelector } from './TransactionSelector'
+import { TransactionReceipt } from 'web3-eth'
+
+const LabelText = styled.label`
+  line-height: 36px;
+  max-width: 140px;
+`
+
+const Input = styled.input`
+  background-color: var(--bg-color);
+  color: var(--font-color);
+  max-width: 100%;
+  border-color: var(--color-primary) !important;
+  &:hover,
+  &:active,
+  &:focus {
+    border-color: var(--button-color) !important;
+  }
+`
+
+export const Form = ({ onSubmit }: { onSubmit: ({ chainId, txHash, receipt }: FormSubmitParams) => void }) => {
+  const [txHash, setTxHash] = useState('')
+  const [searchTx, setSearchTx] = useState(false)
+
+  const formSubmit = (e: FormEvent) => {
+    e.preventDefault()
+    setSearchTx(true)
+  }
+
+  const onSelected = (chainId: number, receipt: TransactionReceipt) => {
+    onSubmit({ chainId, txHash, receipt })
+  }
+
+  const onBack = () => {
+    setTxHash('')
+    setSearchTx(false)
+  }
+
+  if (searchTx) {
+    return <TransactionSelector txHash={txHash} onSelected={onSelected} onBack={onBack} />
+  }
+
+  return (
+    <form onSubmit={formSubmit}>
+      <div className="row is-center">
+        <LabelText className="col-2">Bridgeable tx hash:</LabelText>
+        <div className="col-7">
+          <Input
+            placeholder="Enter transaction hash"
+            type="text"
+            onChange={e => setTxHash(e.target.value)}
+            required
+            pattern="^0x[a-fA-F0-9]{64}$"
+            value={txHash}
+          />
+        </div>
+        <div className="col-1">
+          <Button className="button outline" type="submit">
+            Check
+          </Button>
+        </div>
+      </div>
+    </form>
+  )
+}

alm/src/components/MainPage.tsx

@@ -0,0 +1,148 @@
+import React, { useEffect, useState, useCallback } from 'react'
+import styled from 'styled-components'
+import { Route, useHistory } from 'react-router-dom'
+import { Form } from './Form'
+import { StatusContainer } from './StatusContainer'
+import { useStateProvider } from '../state/StateProvider'
+import { TransactionReceipt } from 'web3-eth'
+import { InfoAlert } from './commons/InfoAlert'
+import { ExplorerTxLink } from './commons/ExplorerTxLink'
+import { FOREIGN_NETWORK_NAME, HOME_NETWORK_NAME } from '../config/constants'
+
+const StyledMainPage = styled.div`
+  text-align: center;
+  min-height: 100vh;
+`
+
+const Header = styled.header`
+  background-color: #001529;
+  color: #ffffff;
+  margin-bottom: 50px;
+`
+
+const HeaderContainer = styled.header`
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  justify-content: space-between;
+  font-size: 16px;
+  height: 64px;
+  line-height: 64px;
+  padding: 0 50px;
+
+  @media (max-width: 600px) {
+    padding: 0 20px;
+  }
+`
+
+const AlertP = styled.p`
+  align-items: start;
+  margin-bottom: 0;
+  @media (max-width: 600px) {
+    flex-direction: column;
+  }
+`
+
+export interface FormSubmitParams {
+  chainId: number
+  txHash: string
+  receipt: TransactionReceipt
+}
+
+export const MainPage = () => {
+  const history = useHistory()
+  const { home, foreign } = useStateProvider()
+  const [networkName, setNetworkName] = useState('')
+  const [receipt, setReceipt] = useState<Maybe<TransactionReceipt>>(null)
+  const [showInfoAlert, setShowInfoAlert] = useState(false)
+
+  const loadFromStorage = useCallback(() => {
+    const hideAlert = window.localStorage.getItem('hideInfoAlert')
+    setShowInfoAlert(!hideAlert)
+  }, [])
+
+  useEffect(
+    () => {
+      loadFromStorage()
+    },
+    [loadFromStorage]
+  )
+
+  const onAlertClose = useCallback(
+    () => {
+      window.localStorage.setItem('hideInfoAlert', 'true')
+      loadFromStorage()
+    },
+    [loadFromStorage]
+  )
+
+  const setNetworkData = (chainId: number) => {
+    const network = chainId === home.chainId ? home.name : foreign.name
+
+    setNetworkName(network)
+  }
+
+  const onFormSubmit = ({ chainId, txHash, receipt }: FormSubmitParams) => {
+    setNetworkData(chainId)
+    setReceipt(receipt)
+    history.push(`/${chainId}/${txHash}`)
+  }
+
+  const resetNetworkHeader = () => {
+    setNetworkName('')
+  }
+
+  const setNetworkFromParams = (chainId: number) => {
+    setNetworkData(chainId)
+  }
+
+  useEffect(() => {
+    const w = window as any
+    if (w.ethereum) {
+      w.ethereum.autoRefreshOnNetworkChange = false
+    }
+  }, [])
+
+  return (
+    <StyledMainPage>
+      <Header>
+        <HeaderContainer>
+          <span>AMB Live Monitoring</span>
+          <span>{networkName}</span>
+        </HeaderContainer>
+      </Header>
+      <div className="container">
+        {showInfoAlert && (
+          <InfoAlert onClick={onAlertClose}>
+            <p className="is-left text-left">
+              The Arbitrary Message Bridge Live Monitoring application provides real-time status updates for messages
+              bridged between {HOME_NETWORK_NAME} and {FOREIGN_NETWORK_NAME}. You can check current tx status, view
+              validator info, and troubleshoot potential issues with bridge transfers.
+            </p>
+            <AlertP className="is-left text-left">
+              For more information refer to&nbsp;
+              <ExplorerTxLink
+                href="https://docs.tokenbridge.net/about-tokenbridge/components/amb-live-monitoring-application"
+                target="_blank"
+                rel="noopener noreferrer"
+              >
+                the ALM documentation
+              </ExplorerTxLink>
+            </AlertP>
+          </InfoAlert>
+        )}
+        <Route exact path={['/']} children={<Form onSubmit={onFormSubmit} />} />
+        <Route
+          path={['/:chainId/:txHash/:messageIdParam', '/:chainId/:txHash']}
+          children={
+            <StatusContainer
+              onBackToMain={resetNetworkHeader}
+              setNetworkFromParams={setNetworkFromParams}
+              receiptParam={receipt}
+            />
+          }
+        />
+      </div>
+    </StyledMainPage>
+  )
+}

alm/src/components/MessageSelector.tsx

@@ -0,0 +1,47 @@
+import React, { useState } from 'react'
+import { Button } from './commons/Button'
+import { RadioButtonLabel, RadioButtonContainer } from './commons/RadioButton'
+import { useWindowWidth } from '@react-hook/window-size'
+import { formatTxHashExtended } from '../utils/networks'
+import { MessageObject } from '../utils/web3'
+
+export interface MessageSelectorParams {
+  messages: Array<MessageObject>
+  onMessageSelected: (index: number) => void
+}
+
+export const MessageSelector = ({ messages, onMessageSelected }: MessageSelectorParams) => {
+  const [messageIndex, setMessageIndex] = useState(0)
+  const windowWidth = useWindowWidth()
+
+  const onSelect = () => {
+    onMessageSelected(messageIndex)
+  }
+
+  return (
+    <div className="row is-center">
+      <div className="col-7-lg col-12 is-marginless">
+        {messages.map((message, i) => (
+          <RadioButtonContainer className="row is-center is-vertical-align" key={i} onClick={() => setMessageIndex(i)}>
+            <input
+              className="is-marginless"
+              type="radio"
+              name="message"
+              value={i}
+              checked={i === messageIndex}
+              onChange={() => setMessageIndex(i)}
+            />
+            <RadioButtonLabel htmlFor={i.toString()}>
+              {windowWidth < 700 ? formatTxHashExtended(message.id) : message.id}
+            </RadioButtonLabel>
+          </RadioButtonContainer>
+        ))}
+      </div>
+      <div className="col-1-lg col-12 is-marginless">
+        <Button className="button outline" onClick={onSelect}>
+          Select
+        </Button>
+      </div>
+    </div>
+  )
+}

alm/src/components/NetworkTransactionSelector.tsx

@@ -0,0 +1,47 @@
+import React, { useState } from 'react'
+import { Button } from './commons/Button'
+import { RadioButtonLabel, RadioButtonContainer } from './commons/RadioButton'
+import { useStateProvider } from '../state/StateProvider'
+
+export const NetworkTransactionSelector = ({ onNetworkSelected }: { onNetworkSelected: (chainId: number) => void }) => {
+  const { home, foreign } = useStateProvider()
+  const [chainId, setChainId] = useState(home.chainId)
+
+  const networks = [home, foreign]
+
+  const onSelect = () => {
+    onNetworkSelected(chainId)
+  }
+
+  return (
+    <div>
+      <p>The transaction was found in both networks, please select one:</p>
+      <div className="row is-center">
+        <div className="col-3-lg col-12 is-marginless">
+          {networks.map((network, i) => (
+            <RadioButtonContainer
+              className="row is-center is-vertical-align"
+              key={i}
+              onClick={() => setChainId(network.chainId)}
+            >
+              <input
+                className="is-marginless"
+                type="radio"
+                name="message"
+                value={network.chainId}
+                checked={network.chainId === chainId}
+                onChange={() => setChainId(network.chainId)}
+              />
+              <RadioButtonLabel htmlFor={i.toString()}>{network.name}</RadioButtonLabel>
+            </RadioButtonContainer>
+          ))}
+        </div>
+        <div className="col-3-lg col-12 is-marginless">
+          <Button className="button outline" onClick={onSelect}>
+            Select
+          </Button>
+        </div>
+      </div>
+    </div>
+  )
+}

alm/src/components/StatusContainer.tsx

@@ -0,0 +1,109 @@
+import React, { useEffect } from 'react'
+import { useHistory, useParams } from 'react-router-dom'
+import { useTransactionStatus } from '../hooks/useTransactionStatus'
+import { formatTxHash, getExplorerTxUrl, getTransactionStatusDescription, validTxHash } from '../utils/networks'
+import { TRANSACTION_STATUS } from '../config/constants'
+import { MessageSelector } from './MessageSelector'
+import { Loading } from './commons/Loading'
+import { useStateProvider } from '../state/StateProvider'
+import { ExplorerTxLink } from './commons/ExplorerTxLink'
+import { ConfirmationsContainer } from './ConfirmationsContainer'
+import { TransactionReceipt } from 'web3-eth'
+import { BackButton } from './commons/BackButton'
+
+export interface StatusContainerParam {
+  onBackToMain: () => void
+  setNetworkFromParams: (chainId: number) => void
+  receiptParam: Maybe<TransactionReceipt>
+}
+
+export const StatusContainer = ({ onBackToMain, setNetworkFromParams, receiptParam }: StatusContainerParam) => {
+  const { home, foreign } = useStateProvider()
+  const history = useHistory()
+  const { chainId, txHash, messageIdParam } = useParams()
+  const validChainId = chainId === home.chainId.toString() || chainId === foreign.chainId.toString()
+  const validParameters = validChainId && validTxHash(txHash)
+
+  const { messages, receipt, status, description, timestamp, loading } = useTransactionStatus({
+    txHash: validParameters ? txHash : '',
+    chainId: validParameters ? parseInt(chainId) : 0,
+    receiptParam
+  })
+
+  const selectedMessageId = messageIdParam === undefined || messages[messageIdParam] === undefined ? -1 : messageIdParam
+
+  useEffect(
+    () => {
+      if (validChainId) {
+        setNetworkFromParams(parseInt(chainId))
+      }
+    },
+    [validChainId, chainId, setNetworkFromParams]
+  )
+
+  if (!validParameters && home.chainId && foreign.chainId) {
+    return (
+      <div>
+        <p>
+          Chain Id: {chainId} and/or Transaction Hash: {txHash} are not valid
+        </p>
+      </div>
+    )
+  }
+
+  if (loading) {
+    return <Loading />
+  }
+
+  const onMessageSelected = (messageId: number) => {
+    history.push(`/${chainId}/${txHash}/${messageId}`)
+  }
+
+  const displayMessageSelector = status === TRANSACTION_STATUS.SUCCESS_MULTIPLE_MESSAGES && selectedMessageId === -1
+  const multiMessageSelected = status === TRANSACTION_STATUS.SUCCESS_MULTIPLE_MESSAGES && selectedMessageId !== -1
+  const displayReference = multiMessageSelected ? messages[selectedMessageId].id : txHash
+  const formattedMessageId = formatTxHash(displayReference)
+
+  const isHome = chainId === home.chainId.toString()
+  const txExplorerLink = getExplorerTxUrl(txHash, isHome)
+  const displayExplorerLink = status !== TRANSACTION_STATUS.NOT_FOUND
+
+  const displayConfirmations = status === TRANSACTION_STATUS.SUCCESS_ONE_MESSAGE || multiMessageSelected
+  const messageToConfirm =
+    messages.length > 1 ? messages[selectedMessageId] : messages.length > 0 ? messages[0] : { id: '', data: '' }
+
+  let displayedDescription: string = multiMessageSelected
+    ? getTransactionStatusDescription(TRANSACTION_STATUS.SUCCESS_ONE_MESSAGE, timestamp)
+    : description
+  let link
+  const descArray = displayedDescription.split('%link')
+  if (descArray.length > 1) {
+    displayedDescription = descArray[0]
+    link = (
+      <ExplorerTxLink href={descArray[1]} target="_blank" rel="noopener noreferrer">
+        {descArray[1]}
+      </ExplorerTxLink>
+    )
+  }
+
+  return (
+    <div>
+      {status && (
+        <p>
+          The transaction{' '}
+          {displayExplorerLink && (
+            <ExplorerTxLink href={txExplorerLink} target="_blank">
+              {formattedMessageId}
+            </ExplorerTxLink>
+          )}
+          {!displayExplorerLink && <label>{formattedMessageId}</label>} {displayedDescription} {link}
+        </p>
+      )}
+      {displayMessageSelector && <MessageSelector messages={messages} onMessageSelected={onMessageSelected} />}
+      {displayConfirmations && (
+        <ConfirmationsContainer message={messageToConfirm} receipt={receipt} fromHome={isHome} timestamp={timestamp} />
+      )}
+      <BackButton onBackToMain={onBackToMain} />
+    </div>
+  )
+}

alm/src/components/TransactionSelector.tsx

@@ -0,0 +1,67 @@
+import React, { useEffect } from 'react'
+import { useTransactionFinder } from '../hooks/useTransactionFinder'
+import { useStateProvider } from '../state/StateProvider'
+import { TRANSACTION_STATUS } from '../config/constants'
+import { TransactionReceipt } from 'web3-eth'
+import { Loading } from './commons/Loading'
+import { NetworkTransactionSelector } from './NetworkTransactionSelector'
+import { BackButton } from './commons/BackButton'
+import { TRANSACTION_STATUS_DESCRIPTION } from '../config/descriptions'
+import { MultiLine } from './commons/MultiLine'
+import styled from 'styled-components'
+
+const StyledMultiLine = styled(MultiLine)`
+  margin-bottom: 40px;
+`
+
+export const TransactionSelector = ({
+  txHash,
+  onSelected,
+  onBack
+}: {
+  txHash: string
+  onSelected: (chainId: number, receipt: TransactionReceipt) => void
+  onBack: () => void
+}) => {
+  const { home, foreign } = useStateProvider()
+  const { receipt: homeReceipt, status: homeStatus } = useTransactionFinder({ txHash, web3: home.web3 })
+  const { receipt: foreignReceipt, status: foreignStatus } = useTransactionFinder({ txHash, web3: foreign.web3 })
+
+  useEffect(
+    () => {
+      if (!home.chainId || !foreign.chainId) return
+      if (homeStatus === TRANSACTION_STATUS.FOUND && foreignStatus === TRANSACTION_STATUS.NOT_FOUND) {
+        if (!homeReceipt) return
+        onSelected(home.chainId, homeReceipt)
+      } else if (foreignStatus === TRANSACTION_STATUS.FOUND && homeStatus === TRANSACTION_STATUS.NOT_FOUND) {
+        if (!foreignReceipt) return
+        onSelected(foreign.chainId, foreignReceipt)
+      }
+    },
+    [homeReceipt, homeStatus, foreignReceipt, foreignStatus, home.chainId, foreign.chainId, onSelected]
+  )
+
+  const onSelectedNetwork = (chainId: number) => {
+    const chain = chainId === home.chainId ? home.chainId : foreign.chainId
+    const receipt = chainId === home.chainId ? homeReceipt : foreignReceipt
+
+    if (!receipt) return
+    onSelected(chain, receipt)
+  }
+
+  if (foreignStatus === TRANSACTION_STATUS.FOUND && homeStatus === TRANSACTION_STATUS.FOUND) {
+    return <NetworkTransactionSelector onNetworkSelected={onSelectedNetwork} />
+  }
+
+  if (foreignStatus === TRANSACTION_STATUS.NOT_FOUND && homeStatus === TRANSACTION_STATUS.NOT_FOUND) {
+    const message = TRANSACTION_STATUS_DESCRIPTION[TRANSACTION_STATUS.NOT_FOUND]
+    return (
+      <div>
+        <StyledMultiLine>{message}</StyledMultiLine>
+        <BackButton onBackToMain={onBack} />
+      </div>
+    )
+  }
+
+  return <Loading />
+}

alm/src/components/ValidatorsConfirmations.tsx

@@ -0,0 +1,101 @@
+import React from 'react'
+import { formatTimestamp, formatTxHash, getExplorerTxUrl } from '../utils/networks'
+import { useWindowWidth } from '@react-hook/window-size'
+import { SEARCHING_TX, VALIDATOR_CONFIRMATION_STATUS } from '../config/constants'
+import { SimpleLoading } from './commons/Loading'
+import styled from 'styled-components'
+import { ConfirmationParam } from '../hooks/useMessageConfirmations'
+import { GreyLabel, RedLabel, SuccessLabel } from './commons/Labels'
+import { ExplorerTxLink } from './commons/ExplorerTxLink'
+import { Thead, AgeTd, StatusTd } from './commons/Table'
+
+const RequiredConfirmations = styled.label`
+  font-size: 14px;
+`
+
+export interface ValidatorsConfirmationsParams {
+  confirmations: Array<ConfirmationParam>
+  requiredSignatures: number
+  validatorList: string[]
+  waitingBlocksResolved: boolean
+}
+
+export const ValidatorsConfirmations = ({
+  confirmations,
+  requiredSignatures,
+  validatorList,
+  waitingBlocksResolved
+}: ValidatorsConfirmationsParams) => {
+  const windowWidth = useWindowWidth()
+
+  const getValidatorStatusElement = (validatorStatus = '') => {
+    switch (validatorStatus) {
+      case VALIDATOR_CONFIRMATION_STATUS.SUCCESS:
+        return <SuccessLabel>{validatorStatus}</SuccessLabel>
+      case VALIDATOR_CONFIRMATION_STATUS.FAILED:
+        return <RedLabel>{validatorStatus}</RedLabel>
+      case VALIDATOR_CONFIRMATION_STATUS.PENDING:
+      case VALIDATOR_CONFIRMATION_STATUS.WAITING:
+      case VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED:
+        return <GreyLabel>{validatorStatus}</GreyLabel>
+      default:
+        return waitingBlocksResolved ? (
+          <GreyLabel>{VALIDATOR_CONFIRMATION_STATUS.WAITING}</GreyLabel>
+        ) : (
+          <SimpleLoading />
+        )
+    }
+  }
+
+  return (
+    <div>
+      <table>
+        <Thead>
+          <tr>
+            <th>Validator</th>
+            <th className="text-center">Status</th>
+            <th className="text-center">Age</th>
+          </tr>
+        </Thead>
+        <tbody>
+          {validatorList.map((validator, i) => {
+            const filteredConfirmation = confirmations.filter(c => c.validator === validator)
+            const confirmation = filteredConfirmation.length > 0 ? filteredConfirmation[0] : null
+            const displayedStatus = confirmation && confirmation.status ? confirmation.status : ''
+            const explorerLink = confirmation && confirmation.txHash ? getExplorerTxUrl(confirmation.txHash, true) : ''
+            const elementIfNoTimestamp =
+              displayedStatus !== VALIDATOR_CONFIRMATION_STATUS.WAITING &&
+              displayedStatus !== VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED ? (
+                (displayedStatus === VALIDATOR_CONFIRMATION_STATUS.UNDEFINED || displayedStatus === '') &&
+                waitingBlocksResolved ? (
+                  SEARCHING_TX
+                ) : (
+                  <SimpleLoading />
+                )
+              ) : (
+                ''
+              )
+            return (
+              <tr key={i}>
+                <td>{windowWidth < 850 ? formatTxHash(validator) : validator}</td>
+                <StatusTd className="text-center">{getValidatorStatusElement(displayedStatus)}</StatusTd>
+                <AgeTd className="text-center">
+                  {confirmation && confirmation.timestamp > 0 ? (
+                    <ExplorerTxLink href={explorerLink} target="_blank">
+                      {formatTimestamp(confirmation.timestamp)}
+                    </ExplorerTxLink>
+                  ) : (
+                    elementIfNoTimestamp
+                  )}
+                </AgeTd>
+              </tr>
+            )
+          })}
+        </tbody>
+      </table>
+      <RequiredConfirmations>
+        {requiredSignatures} of {validatorList.length} confirmations required
+      </RequiredConfirmations>
+    </div>
+  )
+}

alm/src/components/commons/BackButton.tsx

@@ -0,0 +1,35 @@
+import { Link } from 'react-router-dom'
+import { LeftArrow } from './LeftArrow'
+import React from 'react'
+import styled from 'styled-components'
+
+const StyledButton = styled.button`
+  color: var(--button-color);
+  border-color: var(--font-color);
+  margin-top: 10px;
+  &:focus {
+    outline: var(--button-color);
+  }
+`
+
+const BackLabel = styled.label`
+  margin-left: 5px;
+  cursor: pointer;
+`
+
+export interface BackButtonParam {
+  onBackToMain: () => void
+}
+
+export const BackButton = ({ onBackToMain }: BackButtonParam) => (
+  <div className="row is-center">
+    <div className="col-9">
+      <Link to="/" onClick={onBackToMain}>
+        <StyledButton className="button outline is-left">
+          <LeftArrow />
+          <BackLabel>Search another transaction</BackLabel>
+        </StyledButton>
+      </Link>
+    </div>
+  </div>
+)

alm/src/components/commons/Button.tsx

@@ -0,0 +1,10 @@
+import styled from 'styled-components'
+
+export const Button = styled.button`
+  height: 36px;
+  color: var(--button-color);
+  border-color: var(--button-color);
+  &:focus {
+    outline: var(--button-color);
+  }
+`

alm/src/components/commons/CloseIcon.tsx

@@ -0,0 +1,21 @@
+import React from 'react'
+
+export const CloseIcon = () => (
+  <svg
+    aria-hidden="true"
+    focusable="false"
+    data-prefix="fa"
+    data-icon="times"
+    className="svg-inline--fa fa-times fa-w-11 fa-lg "
+    role="img"
+    xmlns="http://www.w3.org/2000/svg"
+    viewBox="0 0 352 512"
+    fill="#1890ff"
+    height="1em"
+  >
+    <path
+      fill="#1890ff"
+      d="M242.72 256l100.07-100.07c12.28-12.28 12.28-32.19 0-44.48l-22.24-22.24c-12.28-12.28-32.19-12.28-44.48 0L176 189.28 75.93 89.21c-12.28-12.28-32.19-12.28-44.48 0L9.21 111.45c-12.28 12.28-12.28 32.19 0 44.48L109.28 256 9.21 356.07c-12.28 12.28-12.28 32.19 0 44.48l22.24 22.24c12.28 12.28 32.2 12.28 44.48 0L176 322.72l100.07 100.07c12.28 12.28 32.2 12.28 44.48 0l22.24-22.24c12.28-12.28 12.28-32.19 0-44.48L242.72 256z"
+    />
+  </svg>
+)

alm/src/components/commons/ExplorerTxLink.tsx

@@ -0,0 +1,7 @@
+import styled from 'styled-components'
+
+export const ExplorerTxLink = styled.a`
+  color: var(--link-color);
+  text-decoration: underline;
+  font-weight: bold;
+`

alm/src/components/commons/InfoAlert.tsx

@@ -0,0 +1,31 @@
+import React from 'react'
+import styled from 'styled-components'
+import { InfoIcon } from './InfoIcon'
+import { CloseIcon } from './CloseIcon'
+
+const StyledInfoAlert = styled.div`
+  border: 1px solid var(--button-color);
+  border-radius: 4px;
+  margin-bottom: 20px;
+  padding-top: 10px;
+`
+
+const CloseIconContainer = styled.div`
+  cursor: pointer;
+`
+
+const TextContainer = styled.div`
+  flex-direction: column;
+`
+
+export const InfoAlert = ({ onClick, children }: { onClick: () => void; children: React.ReactChild[] }) => (
+  <div className="row is-center">
+    <StyledInfoAlert className="col-10 is-vertical-align row">
+      <InfoIcon />
+      <TextContainer className="col-10">{children}</TextContainer>
+      <CloseIconContainer className="col-1 is-vertical-align is-center" onClick={onClick}>
+        <CloseIcon />
+      </CloseIconContainer>
+    </StyledInfoAlert>
+  </div>
+)

alm/src/components/commons/InfoIcon.tsx

@@ -0,0 +1,16 @@
+import React from 'react'
+
+export const InfoIcon = () => (
+  <svg
+    className="col-1 is-left"
+    viewBox="64 64 896 896"
+    focusable="false"
+    data-icon="info-circle"
+    width="1em"
+    height="1em"
+    fill="#1890ff"
+    aria-hidden="true"
+  >
+    <path d="M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm32 664c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V456c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272zm-32-344a48.01 48.01 0 010-96 48.01 48.01 0 010 96z" />
+  </svg>
+)

alm/src/components/commons/Labels.tsx

@@ -0,0 +1,22 @@
+import styled from 'styled-components'
+
+export const SuccessLabel = styled.label`
+  color: var(--success-color);
+  background-color: var(--success-bg-color);
+  padding: 0.4rem 0.7rem;
+  border-radius: 4px;
+`
+
+export const GreyLabel = styled.label`
+  color: var(--not-required-color);
+  background-color: var(--not-required-bg-color);
+  padding: 0.4rem 0.7rem;
+  border-radius: 4px;
+`
+
+export const RedLabel = styled.label`
+  color: var(--failed-color);
+  background-color: var(--failed-bg-color);
+  padding: 0.4rem 0.7rem;
+  border-radius: 4px;
+`

alm/src/components/commons/LeftArrow.tsx

@@ -0,0 +1,20 @@
+import React from 'react'
+import { useContext } from 'react'
+import { ThemeContext } from 'styled-components'
+
+export const LeftArrow = () => {
+  const themeContext = useContext(ThemeContext)
+  return (
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      version="1.1"
+      id="mdi-arrow-left"
+      width="24"
+      height="24"
+      viewBox="0 0 24 24"
+      fill={themeContext.buttonColor}
+    >
+      <path d="M20,11V13H8L13.5,18.5L12.08,19.92L4.16,12L12.08,4.08L13.5,5.5L8,11H20Z" />
+    </svg>
+  )
+}

alm/src/components/commons/Loading.tsx

@@ -0,0 +1,165 @@
+import React, { useContext } from 'react'
+import { ThemeContext } from 'styled-components'
+
+export interface LoadingParams {
+  width?: string
+  height?: string
+  displayMessage?: boolean
+}
+
+export const Loading = ({ width = '50px', height = '50px', displayMessage = true }: LoadingParams) => {
+  const themeContext = useContext(ThemeContext)
+  return (
+    <div className="row is-center">
+      <svg
+        xmlns="http://www.w3.org/2000/svg"
+        style={{ background: 'none', display: 'block', shapeRendering: 'auto' }}
+        width={width}
+        height={height}
+        viewBox="0 0 100 100"
+        preserveAspectRatio="xMidYMid"
+      >
+        <g transform="rotate(0 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.9166666666666666s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(30 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.8333333333333334s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(60 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.75s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(90 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.6666666666666666s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(120 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.5833333333333334s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(150 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.5s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(180 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.4166666666666667s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(210 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.3333333333333333s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(240 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.25s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(270 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.16666666666666666s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(300 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate
+              attributeName="opacity"
+              values="1;0"
+              keyTimes="0;1"
+              dur="1s"
+              begin="-0.08333333333333333s"
+              repeatCount="indefinite"
+            />
+          </rect>
+        </g>
+        <g transform="rotate(330 50 50)">
+          <rect x="47" y="24" rx="3" ry="6" width="6" height="12" fill={themeContext.buttonColor}>
+            <animate attributeName="opacity" values="1;0" keyTimes="0;1" dur="1s" begin="0s" repeatCount="indefinite" />
+          </rect>
+        </g>
+      </svg>
+      {displayMessage && <label style={{ color: themeContext.buttonColor }}>Loading...</label>}
+    </div>
+  )
+}
+
+export const SimpleLoading = () => <Loading width="30px" height="30px" displayMessage={false} />

alm/src/components/commons/MultiLine.tsx

@@ -0,0 +1,5 @@
+import styled from 'styled-components'
+
+export const MultiLine = styled.div`
+  white-space: pre-wrap;
+`

alm/src/components/commons/RadioButton.tsx

@@ -0,0 +1,9 @@
+import styled from 'styled-components'
+
+export const RadioButtonLabel = styled.label`
+  padding-left: 5px;
+`
+
+export const RadioButtonContainer = styled.div`
+  padding: 10px;
+`

alm/src/components/commons/Table.tsx

@@ -0,0 +1,13 @@
+import styled from 'styled-components'
+
+export const Thead = styled.thead`
+  border-bottom: 2px solid #9e9e9e;
+`
+
+export const StatusTd = styled.td`
+  width: 150px;
+`
+
+export const AgeTd = styled.td`
+  width: 180px;
+`

alm/src/config/constants.ts

@@ -0,0 +1,63 @@
+export const HOME_BRIDGE_ADDRESS: string = process.env.REACT_APP_COMMON_HOME_BRIDGE_ADDRESS || ''
+export const FOREIGN_BRIDGE_ADDRESS: string = process.env.REACT_APP_COMMON_FOREIGN_BRIDGE_ADDRESS || ''
+
+export const HOME_RPC_URL: string = process.env.REACT_APP_COMMON_HOME_RPC_URL || ''
+export const FOREIGN_RPC_URL: string = process.env.REACT_APP_COMMON_FOREIGN_RPC_URL || ''
+
+export const HOME_NETWORK_NAME: string = process.env.REACT_APP_ALM_HOME_NETWORK_NAME || ''
+export const FOREIGN_NETWORK_NAME: string = process.env.REACT_APP_ALM_FOREIGN_NETWORK_NAME || ''
+
+export const HOME_EXPLORER_TX_TEMPLATE: string = process.env.REACT_APP_ALM_HOME_EXPLORER_TX_TEMPLATE || ''
+export const FOREIGN_EXPLORER_TX_TEMPLATE: string = process.env.REACT_APP_ALM_FOREIGN_EXPLORER_TX_TEMPLATE || ''
+
+export const HOME_EXPLORER_API: string = process.env.REACT_APP_ALM_HOME_EXPLORER_API || ''
+export const FOREIGN_EXPLORER_API: string = process.env.REACT_APP_ALM_FOREIGN_EXPLORER_API || ''
+
+export const HOME_RPC_POLLING_INTERVAL: number = 5000
+export const FOREIGN_RPC_POLLING_INTERVAL: number = 5000
+export const BLOCK_RANGE: number = 50
+export const ONE_DAY_TIMESTAMP: number = 86400
+export const THREE_DAYS_TIMESTAMP: number = 259200
+
+export const EXECUTE_AFFIRMATION_HASH = 'e7a2c01f'
+export const SUBMIT_SIGNATURE_HASH = '630cea8e'
+export const EXECUTE_SIGNATURES_HASH = '3f7658fd'
+
+export const CACHE_KEY_SUCCESS = 'success-confirmation-validator-'
+export const CACHE_KEY_FAILED = 'failed-confirmation-validator-'
+export const CACHE_KEY_EXECUTION_FAILED = 'failed-execution-validator-'
+
+export const TRANSACTION_STATUS = {
+  SUCCESS_MULTIPLE_MESSAGES: 'SUCCESS_MULTIPLE_MESSAGES',
+  SUCCESS_ONE_MESSAGE: 'SUCCESS_ONE_MESSAGE',
+  SUCCESS_NO_MESSAGES: 'SUCCESS_NO_MESSAGES',
+  FAILED: 'FAILED',
+  FOUND: 'FOUND',
+  NOT_FOUND: 'NOT_FOUND',
+  UNDEFINED: 'UNDEFINED'
+}
+
+export const CONFIRMATIONS_STATUS = {
+  SUCCESS: 'SUCCESS',
+  SUCCESS_MESSAGE_FAILED: 'SUCCESS_MESSAGE_FAILED',
+  EXECUTION_FAILED: 'EXECUTION_FAILED',
+  EXECUTION_PENDING: 'EXECUTION_PENDING',
+  EXECUTION_WAITING: 'EXECUTION_WAITING',
+  FAILED: 'FAILED',
+  PENDING: 'PENDING',
+  SEARCHING: 'SEARCHING',
+  WAITING_VALIDATORS: 'WAITING_VALIDATORS',
+  WAITING_CHAIN: 'WAITING_CHAIN',
+  UNDEFINED: 'UNDEFINED'
+}
+
+export const VALIDATOR_CONFIRMATION_STATUS = {
+  SUCCESS: 'Success',
+  FAILED: 'Failed',
+  PENDING: 'Pending',
+  WAITING: 'Waiting',
+  NOT_REQUIRED: 'Not required',
+  UNDEFINED: 'UNDEFINED'
+}
+
+export const SEARCHING_TX = 'Searching Transaction...'

alm/src/config/descriptions.ts

@@ -0,0 +1,73 @@
+// %t will be replaced by the time -> x minutes/hours/days ago
+export const TRANSACTION_STATUS_DESCRIPTION: { [key: string]: string } = {
+  SUCCESS_MULTIPLE_MESSAGES: 'was initiated %t and contains several bridge messages. Specify one of them:',
+  SUCCESS_ONE_MESSAGE: 'was initiated %t',
+  SUCCESS_NO_MESSAGES:
+    'successfully mined %t but it does not seem to contain any request to the bridge, \nso nothing needs to be confirmed by the validators. \nIf you are sure that the transaction should contain a request to the bridge,\ncontact to the validators by \nmessaging on %linkhttps://forum.poa.network/c/support',
+  FAILED: 'failed %t',
+  NOT_FOUND:
+    'Transaction not found. \n1. Check that the transaction hash is correct. \n2. Wait several blocks for the transaction to be\nmined, gas price affects mining speed.'
+}
+
+export const CONFIRMATIONS_STATUS_LABEL: { [key: string]: string } = {
+  SUCCESS: 'Success',
+  SUCCESS_MESSAGE_FAILED: 'Success',
+  FAILED: 'Failed',
+  PENDING: 'Pending',
+  WAITING_VALIDATORS: 'Waiting',
+  SEARCHING: 'Waiting',
+  WAITING_CHAIN: 'Waiting'
+}
+
+export const CONFIRMATIONS_STATUS_LABEL_HOME: { [key: string]: string } = {
+  SUCCESS: 'Success',
+  SUCCESS_MESSAGE_FAILED: 'Success',
+  EXECUTION_FAILED: 'Execution failed',
+  EXECUTION_PENDING: 'Execution pending',
+  EXECUTION_WAITING: 'Execution waiting',
+  FAILED: 'Confirmation Failed',
+  PENDING: 'Confirmation Pending',
+  WAITING_VALIDATORS: 'Confirmation Waiting',
+  SEARCHING: 'Confirmation Waiting',
+  WAITING_CHAIN: 'Confirmation Waiting'
+}
+
+// use %link to identify a link
+export const CONFIRMATIONS_STATUS_DESCRIPTION: { [key: string]: string } = {
+  SUCCESS: '',
+  SUCCESS_MESSAGE_FAILED:
+    'The specified transaction was included in a block,\nthe validators collected signatures and the cross-chain relay was executed correctly,\nbut the contained message execution failed.\nContact the support of the application you used to produce the transaction for the clarifications.',
+  FAILED:
+    'The specified transaction was included in a block,\nbut confirmations sent by a majority of validators\nfailed. The cross-chain relay request will not be\nprocessed. Contact to the validators by\nmessaging on %linkhttps://forum.poa.network/c/support',
+  PENDING:
+    'The specified transaction was included in a block. A\nmajority of validators sent confirmations which have\nnot yet been added to a block.',
+  WAITING_VALIDATORS:
+    'The specified transaction was included in a block.\nSome validators have sent confirmations, others are\nwaiting for chain finalization.\nCheck status again after a few blocks. If the issue still persists contact to the validators by messaging on %linkhttps://forum.poa.network/c/support',
+  SEARCHING:
+    'The specified transaction was included in a block. The app is looking for confirmations. Either\n1. Validators are waiting for chain finalization before sending their signatures.\n2. Validators are not active.\n3. The bridge was stopped.\nCheck status again after a few blocks. If the issue still persists contact to the validators by messaging on %linkhttps://forum.poa.network/c/support',
+  WAITING_CHAIN:
+    'The specified transaction was included in a block.\nValidators are waiting for chain finalization before\nsending their confirmations.'
+}
+
+// use %link to identify a link
+export const CONFIRMATIONS_STATUS_DESCRIPTION_HOME: { [key: string]: string } = {
+  SUCCESS: '',
+  SUCCESS_MESSAGE_FAILED:
+    'The specified transaction was included in a block,\nthe validators collected signatures and the cross-chain relay was executed correctly,\nbut the contained message execution failed.\nContact the support of the application you used to produce the transaction for the clarifications.',
+  EXECUTION_FAILED:
+    'The specified transaction was included in a block\nand the validators collected signatures. The\nvalidator’s transaction with collected signatures was\nsent but did not succeed. Contact to the validators by messaging\non %linkhttps://forum.poa.network/c/support',
+  EXECUTION_PENDING:
+    'The specified transaction was included in a block\nand the validators collected signatures. The\nvalidator’s transaction with collected signatures was\nsent but is not yet added to a block.',
+  EXECUTION_WAITING:
+    'The specified transaction was included in a block\nand the validators collected signatures. Either\n1. One of the validators is waiting for chain finalization.\n2. A validator skipped its duty to relay signatures.\nCheck status again after a few blocks. If the issue still persists contact to the validators by messaging on %linkhttps://forum.poa.network/c/support',
+  FAILED:
+    'The specified transaction was included in a block,\nbut transactions with signatures sent by a majority of\nvalidators failed. The cross-chain relay request will\nnot be processed. Contact to the validators by\nmessaging on %linkhttps://forum.poa.network/c/support',
+  PENDING:
+    'The specified transaction was included in a block.\nA majority of validators sent signatures which have not\nyet been added to a block.',
+  WAITING_VALIDATORS:
+    'The specified transaction was included in a block.\nSome validators have sent signatures, others are\nwaiting for chain finalization.\nCheck status again after a few blocks. If the issue still persists contact to the validators by messaging on %linkhttps://forum.poa.network/c/support',
+  SEARCHING:
+    'The specified transaction was included in a block. The app is looking for confirmations. Either\n1. Validators are waiting for chain finalization before sending their signatures.\n2. Validators are not active.\n3. The bridge was stopped.\nCheck status again after a few blocks. If the issue still persists contact to the validators by messaging on %linkhttps://forum.poa.network/c/support',
+  WAITING_CHAIN:
+    'The specified transaction was included in a block.\nValidators are waiting for chain finalization\nbefore sending their signatures.'
+}

alm/src/global.d.ts

@@ -0,0 +1 @@
+declare type Maybe<T> = T | null

alm/src/hooks/useBlockConfirmations.ts

@@ -0,0 +1,41 @@
+import { useEffect, useState } from 'react'
+import { TransactionReceipt } from 'web3-eth'
+import { useStateProvider } from '../state/StateProvider'
+import { Contract } from 'web3-eth-contract'
+import { getRequiredBlockConfirmations } from '../utils/contract'
+import { foreignSnapshotProvider, homeSnapshotProvider, SnapshotProvider } from '../services/SnapshotProvider'
+
+export interface UseBlockConfirmationsParams {
+  fromHome: boolean
+  receipt: Maybe<TransactionReceipt>
+}
+
+export const useBlockConfirmations = ({ receipt, fromHome }: UseBlockConfirmationsParams) => {
+  const [blockConfirmations, setBlockConfirmations] = useState(0)
+
+  const { home, foreign } = useStateProvider()
+
+  const callRequireBlockConfirmations = async (
+    contract: Contract,
+    receipt: TransactionReceipt,
+    setResult: Function,
+    snapshotProvider: SnapshotProvider
+  ) => {
+    const result = await getRequiredBlockConfirmations(contract, receipt.blockNumber, snapshotProvider)
+    setResult(result)
+  }
+
+  useEffect(
+    () => {
+      const bridgeContract = fromHome ? home.bridgeContract : foreign.bridgeContract
+      const snapshotProvider = fromHome ? homeSnapshotProvider : foreignSnapshotProvider
+      if (!bridgeContract || !receipt) return
+      callRequireBlockConfirmations(bridgeContract, receipt, setBlockConfirmations, snapshotProvider)
+    },
+    [home.bridgeContract, foreign.bridgeContract, receipt, fromHome]
+  )
+
+  return {
+    blockConfirmations
+  }
+}

alm/src/hooks/useBridgeContracts.ts

@@ -0,0 +1,38 @@
+import { useEffect, useState } from 'react'
+import { HOME_AMB_ABI, FOREIGN_AMB_ABI } from '../abis'
+import { FOREIGN_BRIDGE_ADDRESS, HOME_BRIDGE_ADDRESS } from '../config/constants'
+import { Contract } from 'web3-eth-contract'
+import Web3 from 'web3'
+
+export interface useBridgeContractsParams {
+  homeWeb3: Web3
+  foreignWeb3: Web3
+}
+
+export const useBridgeContracts = ({ homeWeb3, foreignWeb3 }: useBridgeContractsParams) => {
+  const [homeBridge, setHomeBridge] = useState<Maybe<Contract>>(null)
+  const [foreignBridge, setForeignBridge] = useState<Maybe<Contract>>(null)
+
+  useEffect(
+    () => {
+      if (!homeWeb3) return
+      const homeContract = new homeWeb3.eth.Contract(HOME_AMB_ABI, HOME_BRIDGE_ADDRESS)
+      setHomeBridge(homeContract)
+    },
+    [homeWeb3]
+  )
+
+  useEffect(
+    () => {
+      if (!foreignWeb3) return
+      const foreignContract = new foreignWeb3.eth.Contract(FOREIGN_AMB_ABI, FOREIGN_BRIDGE_ADDRESS)
+      setForeignBridge(foreignContract)
+    },
+    [foreignWeb3]
+  )
+
+  return {
+    homeBridge,
+    foreignBridge
+  }
+}

alm/src/hooks/useMessageConfirmations.ts

@@ -0,0 +1,374 @@
+import { useStateProvider } from '../state/StateProvider'
+import { TransactionReceipt } from 'web3-eth'
+import { MessageObject } from '../utils/web3'
+import { useEffect, useState } from 'react'
+import { EventData } from 'web3-eth-contract'
+import { getAffirmationsSigned, getMessagesSigned } from '../utils/contract'
+import {
+  BLOCK_RANGE,
+  CONFIRMATIONS_STATUS,
+  FOREIGN_RPC_POLLING_INTERVAL,
+  HOME_RPC_POLLING_INTERVAL,
+  VALIDATOR_CONFIRMATION_STATUS
+} from '../config/constants'
+import { homeBlockNumberProvider, foreignBlockNumberProvider } from '../services/BlockNumberProvider'
+import { checkSignaturesWaitingForBLocks } from '../utils/signatureWaitingForBlocks'
+import { getCollectedSignaturesEvent } from '../utils/getCollectedSignaturesEvent'
+import { checkWaitingBlocksForExecution } from '../utils/executionWaitingForBlocks'
+import { getConfirmationsForTx } from '../utils/getConfirmationsForTx'
+import { getFinalizationEvent } from '../utils/getFinalizationEvent'
+import {
+  getValidatorFailedTransactionsForMessage,
+  getExecutionFailedTransactionForMessage,
+  getValidatorPendingTransactionsForMessage,
+  getExecutionPendingTransactionsForMessage,
+  getValidatorSuccessTransactionsForMessage
+} from '../utils/explorer'
+
+export interface useMessageConfirmationsParams {
+  message: MessageObject
+  receipt: Maybe<TransactionReceipt>
+  fromHome: boolean
+  timestamp: number
+  requiredSignatures: number
+  validatorList: string[]
+  blockConfirmations: number
+}
+
+export interface BasicConfirmationParam {
+  validator: string
+  status: string
+}
+
+export interface ConfirmationParam extends BasicConfirmationParam {
+  txHash: string
+  timestamp: number
+}
+
+export interface ExecutionData {
+  status: string
+  validator: string
+  txHash: string
+  timestamp: number
+  executionResult: boolean
+}
+
+export const useMessageConfirmations = ({
+  message,
+  receipt,
+  fromHome,
+  timestamp,
+  requiredSignatures,
+  validatorList,
+  blockConfirmations
+}: useMessageConfirmationsParams) => {
+  const { home, foreign } = useStateProvider()
+  const [confirmations, setConfirmations] = useState<Array<ConfirmationParam>>([])
+  const [status, setStatus] = useState(CONFIRMATIONS_STATUS.UNDEFINED)
+  const [waitingBlocks, setWaitingBlocks] = useState(false)
+  const [waitingBlocksResolved, setWaitingBlocksResolved] = useState(false)
+  const [signatureCollected, setSignatureCollected] = useState(false)
+  const [collectedSignaturesEvent, setCollectedSignaturesEvent] = useState<Maybe<EventData>>(null)
+  const [executionData, setExecutionData] = useState<ExecutionData>({
+    status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+    validator: '',
+    txHash: '',
+    timestamp: 0,
+    executionResult: false
+  })
+  const [waitingBlocksForExecution, setWaitingBlocksForExecution] = useState(false)
+  const [waitingBlocksForExecutionResolved, setWaitingBlocksForExecutionResolved] = useState(false)
+  const [failedConfirmations, setFailedConfirmations] = useState(false)
+  const [failedExecution, setFailedExecution] = useState(false)
+  const [pendingConfirmations, setPendingConfirmations] = useState(false)
+  const [pendingExecution, setPendingExecution] = useState(false)
+
+  const existsConfirmation = (confirmationArray: ConfirmationParam[]) => {
+    const filteredList = confirmationArray.filter(
+      c => c.status !== VALIDATOR_CONFIRMATION_STATUS.UNDEFINED && c.status !== VALIDATOR_CONFIRMATION_STATUS.WAITING
+    )
+    return filteredList.length > 0
+  }
+
+  // Check if the validators are waiting for block confirmations to verify the message
+  useEffect(
+    () => {
+      if (!receipt || !blockConfirmations) return
+
+      const subscriptions: Array<number> = []
+
+      const unsubscribe = () => {
+        subscriptions.forEach(s => {
+          clearTimeout(s)
+        })
+      }
+
+      const blockProvider = fromHome ? homeBlockNumberProvider : foreignBlockNumberProvider
+      const interval = fromHome ? HOME_RPC_POLLING_INTERVAL : FOREIGN_RPC_POLLING_INTERVAL
+      const web3 = fromHome ? home.web3 : foreign.web3
+      blockProvider.start(web3)
+
+      const targetBlock = receipt.blockNumber + blockConfirmations
+
+      checkSignaturesWaitingForBLocks(
+        targetBlock,
+        setWaitingBlocks,
+        setWaitingBlocksResolved,
+        validatorList,
+        setConfirmations,
+        blockProvider,
+        interval,
+        subscriptions
+      )
+
+      return () => {
+        unsubscribe()
+        blockProvider.stop()
+      }
+    },
+    [blockConfirmations, foreign.web3, fromHome, validatorList, home.web3, receipt]
+  )
+
+  // The collected signature event is only fetched once the signatures are collected on tx from home to foreign, to calculate if
+  // the execution tx on the foreign network is waiting for block confirmations
+  // This is executed if the message is in Home to Foreign direction only
+  useEffect(
+    () => {
+      if (!fromHome || !receipt || !home.web3 || !signatureCollected) return
+
+      const subscriptions: Array<number> = []
+
+      const unsubscribe = () => {
+        subscriptions.forEach(s => {
+          clearTimeout(s)
+        })
+      }
+
+      homeBlockNumberProvider.start(home.web3)
+
+      const fromBlock = receipt.blockNumber
+      const toBlock = fromBlock + BLOCK_RANGE
+      const messageHash = home.web3.utils.soliditySha3Raw(message.data)
+
+      getCollectedSignaturesEvent(
+        home.web3,
+        home.bridgeContract,
+        fromBlock,
+        toBlock,
+        messageHash,
+        setCollectedSignaturesEvent,
+        subscriptions
+      )
+
+      return () => {
+        unsubscribe()
+        homeBlockNumberProvider.stop()
+      }
+    },
+    [fromHome, home.bridgeContract, home.web3, message.data, receipt, signatureCollected]
+  )
+
+  // Check if the responsible validator is waiting for block confirmations to execute the message on foreign network
+  // This is executed if the message is in Home to Foreign direction only
+  useEffect(
+    () => {
+      if (!fromHome || !home.web3 || !receipt || !collectedSignaturesEvent || !blockConfirmations) return
+
+      const subscriptions: Array<number> = []
+
+      const unsubscribe = () => {
+        subscriptions.forEach(s => {
+          clearTimeout(s)
+        })
+      }
+
+      homeBlockNumberProvider.start(home.web3)
+      const targetBlock = collectedSignaturesEvent.blockNumber + blockConfirmations
+
+      checkWaitingBlocksForExecution(
+        homeBlockNumberProvider,
+        HOME_RPC_POLLING_INTERVAL,
+        targetBlock,
+        collectedSignaturesEvent,
+        setWaitingBlocksForExecution,
+        setWaitingBlocksForExecutionResolved,
+        setExecutionData,
+        subscriptions
+      )
+
+      return () => {
+        unsubscribe()
+        homeBlockNumberProvider.stop()
+      }
+    },
+    [collectedSignaturesEvent, fromHome, blockConfirmations, home.web3, receipt]
+  )
+
+  // Checks if validators verified the message
+  // To avoid making extra requests, this is only executed when validators finished waiting for blocks confirmations
+  useEffect(
+    () => {
+      if (!waitingBlocksResolved || !timestamp || !requiredSignatures) return
+
+      const subscriptions: Array<number> = []
+
+      const unsubscribe = () => {
+        subscriptions.forEach(s => {
+          clearTimeout(s)
+        })
+      }
+
+      const confirmationContractMethod = fromHome ? getMessagesSigned : getAffirmationsSigned
+
+      getConfirmationsForTx(
+        message.data,
+        home.web3,
+        validatorList,
+        home.bridgeContract,
+        confirmationContractMethod,
+        setConfirmations,
+        requiredSignatures,
+        setSignatureCollected,
+        waitingBlocksResolved,
+        subscriptions,
+        timestamp,
+        getValidatorFailedTransactionsForMessage,
+        setFailedConfirmations,
+        getValidatorPendingTransactionsForMessage,
+        setPendingConfirmations,
+        getValidatorSuccessTransactionsForMessage
+      )
+
+      return () => {
+        unsubscribe()
+      }
+    },
+    [
+      fromHome,
+      message.data,
+      home.web3,
+      validatorList,
+      home.bridgeContract,
+      requiredSignatures,
+      waitingBlocksResolved,
+      timestamp
+    ]
+  )
+
+  // Gets finalization event to display the information about the execution of the message
+  // In a message from Home to Foreign it will be executed after finishing waiting for block confirmations for the execution transaction on Foreign
+  // In a message from Foreign to Home it will be executed after finishing waiting for block confirmations of the message request
+  useEffect(
+    () => {
+      if ((fromHome && !waitingBlocksForExecutionResolved) || (!fromHome && !waitingBlocksResolved)) return
+
+      const subscriptions: Array<number> = []
+
+      const unsubscribe = () => {
+        subscriptions.forEach(s => {
+          clearTimeout(s)
+        })
+      }
+
+      const contractEvent = fromHome ? 'RelayedMessage' : 'AffirmationCompleted'
+      const bridgeContract = fromHome ? foreign.bridgeContract : home.bridgeContract
+      const providedWeb3 = fromHome ? foreign.web3 : home.web3
+      const interval = fromHome ? FOREIGN_RPC_POLLING_INTERVAL : HOME_RPC_POLLING_INTERVAL
+
+      getFinalizationEvent(
+        bridgeContract,
+        contractEvent,
+        providedWeb3,
+        setExecutionData,
+        waitingBlocksResolved,
+        message,
+        interval,
+        subscriptions,
+        timestamp,
+        collectedSignaturesEvent,
+        getExecutionFailedTransactionForMessage,
+        setFailedExecution,
+        getExecutionPendingTransactionsForMessage,
+        setPendingExecution
+      )
+
+      return () => {
+        unsubscribe()
+      }
+    },
+    [
+      fromHome,
+      foreign.bridgeContract,
+      home.bridgeContract,
+      message,
+      foreign.web3,
+      home.web3,
+      waitingBlocksResolved,
+      waitingBlocksForExecutionResolved,
+      timestamp,
+      collectedSignaturesEvent
+    ]
+  )
+
+  // Sets the message status based in the collected information
+  useEffect(
+    () => {
+      if (executionData.status === VALIDATOR_CONFIRMATION_STATUS.SUCCESS && existsConfirmation(confirmations)) {
+        const newStatus = executionData.executionResult
+          ? CONFIRMATIONS_STATUS.SUCCESS
+          : CONFIRMATIONS_STATUS.SUCCESS_MESSAGE_FAILED
+        setStatus(newStatus)
+      } else if (signatureCollected) {
+        if (fromHome) {
+          if (waitingBlocksForExecution) {
+            setStatus(CONFIRMATIONS_STATUS.EXECUTION_WAITING)
+          } else if (failedExecution) {
+            setStatus(CONFIRMATIONS_STATUS.EXECUTION_FAILED)
+          } else if (pendingExecution) {
+            setStatus(CONFIRMATIONS_STATUS.EXECUTION_PENDING)
+          } else if (waitingBlocksForExecutionResolved) {
+            setStatus(CONFIRMATIONS_STATUS.EXECUTION_WAITING)
+          } else {
+            setStatus(CONFIRMATIONS_STATUS.EXECUTION_WAITING)
+          }
+        } else {
+          setStatus(CONFIRMATIONS_STATUS.UNDEFINED)
+        }
+      } else if (waitingBlocks) {
+        setStatus(CONFIRMATIONS_STATUS.WAITING_CHAIN)
+      } else if (failedConfirmations) {
+        setStatus(CONFIRMATIONS_STATUS.FAILED)
+      } else if (pendingConfirmations) {
+        setStatus(CONFIRMATIONS_STATUS.PENDING)
+      } else if (waitingBlocksResolved && existsConfirmation(confirmations)) {
+        setStatus(CONFIRMATIONS_STATUS.WAITING_VALIDATORS)
+      } else if (waitingBlocksResolved) {
+        setStatus(CONFIRMATIONS_STATUS.SEARCHING)
+      } else {
+        setStatus(CONFIRMATIONS_STATUS.UNDEFINED)
+      }
+    },
+    [
+      executionData,
+      fromHome,
+      signatureCollected,
+      waitingBlocks,
+      waitingBlocksForExecution,
+      failedConfirmations,
+      failedExecution,
+      pendingConfirmations,
+      pendingExecution,
+      waitingBlocksResolved,
+      confirmations,
+      waitingBlocksForExecutionResolved
+    ]
+  )
+
+  return {
+    confirmations,
+    status,
+    signatureCollected,
+    executionData,
+    waitingBlocksResolved
+  }
+}

alm/src/hooks/useNetwork.ts

@@ -0,0 +1,28 @@
+import { useEffect, useState } from 'react'
+import { getChainId, getWeb3 } from '../utils/web3'
+import { SnapshotProvider } from '../services/SnapshotProvider'
+
+export const useNetwork = (url: string, snapshotProvider: SnapshotProvider) => {
+  const [loading, setLoading] = useState(true)
+  const [chainId, setChainId] = useState(0)
+  const web3 = getWeb3(url)
+
+  useEffect(
+    () => {
+      setLoading(true)
+      const getWeb3ChainId = async () => {
+        const id = await getChainId(web3, snapshotProvider)
+        setChainId(id)
+        setLoading(false)
+      }
+      getWeb3ChainId()
+    },
+    [web3, snapshotProvider]
+  )
+
+  return {
+    web3,
+    chainId,
+    loading
+  }
+}

alm/src/hooks/useTransactionFinder.ts

@@ -0,0 +1,56 @@
+import { useEffect, useState } from 'react'
+import { TransactionReceipt } from 'web3-eth'
+import { HOME_RPC_POLLING_INTERVAL, TRANSACTION_STATUS } from '../config/constants'
+import Web3 from 'web3'
+
+export const useTransactionFinder = ({ txHash, web3 }: { txHash: string; web3: Maybe<Web3> }) => {
+  const [status, setStatus] = useState(TRANSACTION_STATUS.UNDEFINED)
+  const [receipt, setReceipt] = useState<Maybe<TransactionReceipt>>(null)
+
+  useEffect(
+    () => {
+      if (!txHash || !web3) return
+
+      const subscriptions: number[] = []
+
+      const unsubscribe = () => {
+        subscriptions.forEach(s => {
+          clearTimeout(s)
+        })
+      }
+
+      const getReceipt = async (
+        web3: Web3,
+        txHash: string,
+        setReceipt: Function,
+        setStatus: Function,
+        subscriptions: number[]
+      ) => {
+        const txReceipt = await web3.eth.getTransactionReceipt(txHash)
+        setReceipt(txReceipt)
+
+        if (!txReceipt) {
+          setStatus(TRANSACTION_STATUS.NOT_FOUND)
+          const timeoutId = setTimeout(
+            () => getReceipt(web3, txHash, setReceipt, setStatus, subscriptions),
+            HOME_RPC_POLLING_INTERVAL
+          )
+          subscriptions.push(timeoutId)
+        } else {
+          setStatus(TRANSACTION_STATUS.FOUND)
+        }
+      }
+
+      getReceipt(web3, txHash, setReceipt, setStatus, subscriptions)
+      return () => {
+        unsubscribe()
+      }
+    },
+    [txHash, web3]
+  )
+
+  return {
+    status,
+    receipt
+  }
+}

alm/src/hooks/useTransactionStatus.ts

@@ -0,0 +1,131 @@
+import { useEffect, useState } from 'react'
+import { TransactionReceipt } from 'web3-eth'
+import { HOME_RPC_POLLING_INTERVAL, TRANSACTION_STATUS } from '../config/constants'
+import { getTransactionStatusDescription } from '../utils/networks'
+import { useStateProvider } from '../state/StateProvider'
+import { getHomeMessagesFromReceipt, getForeignMessagesFromReceipt, MessageObject, getBlock } from '../utils/web3'
+import useInterval from '@use-it/interval'
+
+export const useTransactionStatus = ({
+  txHash,
+  chainId,
+  receiptParam
+}: {
+  txHash: string
+  chainId: number
+  receiptParam: Maybe<TransactionReceipt>
+}) => {
+  const { home, foreign } = useStateProvider()
+  const [messages, setMessages] = useState<Array<MessageObject>>([])
+  const [status, setStatus] = useState('')
+  const [description, setDescription] = useState('')
+  const [receipt, setReceipt] = useState<Maybe<TransactionReceipt>>(null)
+  const [timestamp, setTimestamp] = useState(0)
+  const [loading, setLoading] = useState(true)
+
+  // Update description so the time displayed is accurate
+  useInterval(() => {
+    if (!status || !timestamp || !description) return
+    setDescription(getTransactionStatusDescription(status, timestamp))
+  }, 30000)
+
+  useEffect(
+    () => {
+      const subscriptions: Array<number> = []
+
+      const unsubscribe = () => {
+        subscriptions.forEach(s => {
+          clearTimeout(s)
+        })
+      }
+
+      const getReceipt = async () => {
+        if (!chainId || !txHash || !home.chainId || !foreign.chainId || !home.web3 || !foreign.web3) return
+        setLoading(true)
+        const isHome = chainId === home.chainId
+        const web3 = isHome ? home.web3 : foreign.web3
+
+        let txReceipt
+
+        if (receiptParam) {
+          txReceipt = receiptParam
+        } else {
+          txReceipt = await web3.eth.getTransactionReceipt(txHash)
+        }
+
+        setReceipt(txReceipt)
+
+        if (!txReceipt) {
+          setStatus(TRANSACTION_STATUS.NOT_FOUND)
+          setDescription(getTransactionStatusDescription(TRANSACTION_STATUS.NOT_FOUND))
+          setMessages([{ id: txHash, data: '' }])
+          const timeoutId = setTimeout(() => getReceipt(), HOME_RPC_POLLING_INTERVAL)
+          subscriptions.push(timeoutId)
+        } else {
+          const blockNumber = txReceipt.blockNumber
+          const block = await getBlock(web3, blockNumber)
+          const blockTimestamp = typeof block.timestamp === 'string' ? parseInt(block.timestamp) : block.timestamp
+          setTimestamp(blockTimestamp)
+
+          if (txReceipt.status) {
+            let bridgeMessages: Array<MessageObject>
+            if (isHome) {
+              bridgeMessages = getHomeMessagesFromReceipt(txReceipt, home.web3, home.bridgeAddress)
+            } else {
+              bridgeMessages = getForeignMessagesFromReceipt(txReceipt, foreign.web3, foreign.bridgeAddress)
+            }
+
+            if (bridgeMessages.length === 0) {
+              setMessages([{ id: txHash, data: '' }])
+              setStatus(TRANSACTION_STATUS.SUCCESS_NO_MESSAGES)
+              setDescription(getTransactionStatusDescription(TRANSACTION_STATUS.SUCCESS_NO_MESSAGES, blockTimestamp))
+            } else if (bridgeMessages.length === 1) {
+              setMessages(bridgeMessages)
+              setStatus(TRANSACTION_STATUS.SUCCESS_ONE_MESSAGE)
+              setDescription(getTransactionStatusDescription(TRANSACTION_STATUS.SUCCESS_ONE_MESSAGE, blockTimestamp))
+            } else {
+              setMessages(bridgeMessages)
+              setStatus(TRANSACTION_STATUS.SUCCESS_MULTIPLE_MESSAGES)
+              setDescription(
+                getTransactionStatusDescription(TRANSACTION_STATUS.SUCCESS_MULTIPLE_MESSAGES, blockTimestamp)
+              )
+            }
+          } else {
+            setStatus(TRANSACTION_STATUS.FAILED)
+            setDescription(getTransactionStatusDescription(TRANSACTION_STATUS.FAILED, blockTimestamp))
+          }
+        }
+        setLoading(false)
+      }
+
+      // unsubscribe from previous txHash
+      unsubscribe()
+
+      getReceipt()
+      return () => {
+        // unsubscribe when unmount component
+        unsubscribe()
+      }
+    },
+    [
+      txHash,
+      chainId,
+      home.chainId,
+      foreign.chainId,
+      home.web3,
+      foreign.web3,
+      home.bridgeAddress,
+      foreign.bridgeAddress,
+      receiptParam
+    ]
+  )
+
+  return {
+    messages,
+    status,
+    description,
+    receipt,
+    timestamp,
+    loading
+  }
+}

alm/src/hooks/useValidatorContract.ts

@@ -0,0 +1,76 @@
+import { useEffect, useState } from 'react'
+import { Contract } from 'web3-eth-contract'
+import Web3 from 'web3'
+import { getRequiredSignatures, getValidatorAddress, getValidatorList } from '../utils/contract'
+import { BRIDGE_VALIDATORS_ABI } from '../abis'
+import { useStateProvider } from '../state/StateProvider'
+import { TransactionReceipt } from 'web3-eth'
+import { foreignSnapshotProvider, homeSnapshotProvider, SnapshotProvider } from '../services/SnapshotProvider'
+
+export interface useValidatorContractParams {
+  fromHome: boolean
+  receipt: Maybe<TransactionReceipt>
+}
+
+export const useValidatorContract = ({ receipt, fromHome }: useValidatorContractParams) => {
+  const [validatorContract, setValidatorContract] = useState<Maybe<Contract>>(null)
+  const [requiredSignatures, setRequiredSignatures] = useState(0)
+  const [validatorList, setValidatorList] = useState([])
+
+  const { home, foreign } = useStateProvider()
+
+  const callValidatorContract = async (bridgeContract: Maybe<Contract>, web3: Web3, setValidatorContract: Function) => {
+    if (!web3 || !bridgeContract) return
+    const address = await getValidatorAddress(bridgeContract)
+    const contract = new web3.eth.Contract(BRIDGE_VALIDATORS_ABI, address)
+    setValidatorContract(contract)
+  }
+
+  const callRequiredSignatures = async (
+    contract: Maybe<Contract>,
+    receipt: TransactionReceipt,
+    setResult: Function,
+    snapshotProvider: SnapshotProvider
+  ) => {
+    if (!contract) return
+    const result = await getRequiredSignatures(contract, receipt.blockNumber, snapshotProvider)
+    setResult(result)
+  }
+
+  const callValidatorList = async (
+    contract: Maybe<Contract>,
+    receipt: TransactionReceipt,
+    setResult: Function,
+    snapshotProvider: SnapshotProvider
+  ) => {
+    if (!contract) return
+    const result = await getValidatorList(contract, receipt.blockNumber, snapshotProvider)
+    setResult(result)
+  }
+
+  useEffect(
+    () => {
+      const web3 = fromHome ? home.web3 : foreign.web3
+      const bridgeContract = fromHome ? home.bridgeContract : foreign.bridgeContract
+
+      if (!web3 || !bridgeContract) return
+      callValidatorContract(bridgeContract, web3, setValidatorContract)
+    },
+    [home.web3, foreign.web3, home.bridgeContract, foreign.bridgeContract, fromHome]
+  )
+
+  useEffect(
+    () => {
+      if (!receipt) return
+      const snapshotProvider = fromHome ? homeSnapshotProvider : foreignSnapshotProvider
+      callRequiredSignatures(validatorContract, receipt, setRequiredSignatures, snapshotProvider)
+      callValidatorList(validatorContract, receipt, setValidatorList, snapshotProvider)
+    },
+    [validatorContract, receipt, fromHome]
+  )
+
+  return {
+    requiredSignatures,
+    validatorList
+  }
+}

alm/src/index.tsx

@@ -0,0 +1,16 @@
+import React from 'react'
+import ReactDOM from 'react-dom'
+import { ThemeProvider } from 'styled-components'
+import { GlobalStyle } from './themes/GlobalStyle'
+import App from './App'
+import Light from './themes/Light'
+
+ReactDOM.render(
+  <React.StrictMode>
+    <ThemeProvider theme={Light}>
+      <GlobalStyle />
+      <App />
+    </ThemeProvider>
+  </React.StrictMode>,
+  document.getElementById('root')
+)

alm/src/react-app-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="react-scripts" />

alm/src/services/BlockNumberProvider.ts

@@ -0,0 +1,64 @@
+import Web3 from 'web3'
+import differenceInMilliseconds from 'date-fns/differenceInMilliseconds'
+import { HOME_RPC_POLLING_INTERVAL } from '../config/constants'
+
+export class BlockNumberProvider {
+  private running: number
+  private web3: Maybe<Web3>
+  private ref: number | undefined
+  private value: Maybe<number>
+  private lastValueTimestamp: Maybe<Date>
+  private readonly interval: number
+
+  constructor(interval = 5000) {
+    this.running = 0
+    this.web3 = null
+    this.ref = undefined
+    this.value = null
+    this.lastValueTimestamp = null
+    this.interval = interval
+
+    return this
+  }
+
+  start(web3: Maybe<Web3>) {
+    if (!this.running) {
+      clearTimeout(this.ref)
+      this.web3 = web3
+      this.running = this.running + 1
+      this.fetchLastBlock()
+    } else {
+      this.running = this.running + 1
+    }
+  }
+
+  stop() {
+    this.running = this.running > 0 ? this.running - 1 : 0
+
+    if (!this.running) {
+      clearTimeout(this.ref)
+      this.ref = undefined
+      this.web3 = null
+    }
+  }
+
+  get() {
+    return this.value
+  }
+
+  private async fetchLastBlock() {
+    if (!this.web3) return
+    const now = new Date()
+    const distance = differenceInMilliseconds(now, this.lastValueTimestamp || 0)
+
+    if (distance >= this.interval) {
+      this.value = await this.web3.eth.getBlockNumber()
+      this.lastValueTimestamp = now
+    }
+
+    this.ref = setTimeout(() => this.fetchLastBlock(), this.interval)
+  }
+}
+
+export const homeBlockNumberProvider = new BlockNumberProvider(HOME_RPC_POLLING_INTERVAL)
+export const foreignBlockNumberProvider = new BlockNumberProvider(HOME_RPC_POLLING_INTERVAL)

alm/src/services/SnapshotProvider.ts

@@ -0,0 +1,69 @@
+const initialValue = {
+  chainId: 0,
+  RequiredBlockConfirmationChanged: [],
+  RequiredSignaturesChanged: [],
+  ValidatorAdded: [],
+  ValidatorRemoved: [],
+  snapshotBlockNumber: 0
+}
+
+export interface SnapshotEvent {
+  blockNumber: number
+  returnValues: any
+}
+
+export interface SnapshotValidatorEvent {
+  blockNumber: number
+  returnValues: any
+  event: string
+}
+
+export interface Snapshot {
+  chainId: number
+  RequiredBlockConfirmationChanged: SnapshotEvent[]
+  RequiredSignaturesChanged: SnapshotEvent[]
+  ValidatorAdded: SnapshotValidatorEvent[]
+  ValidatorRemoved: SnapshotValidatorEvent[]
+  snapshotBlockNumber: number
+}
+
+export class SnapshotProvider {
+  private data: Snapshot
+
+  constructor(side: string) {
+    let data = initialValue
+    try {
+      data = require(`../snapshots/${side}.json`)
+    } catch (e) {
+      console.log('Snapshot not found')
+    }
+    this.data = data
+  }
+
+  chainId() {
+    return this.data.chainId
+  }
+
+  snapshotBlockNumber() {
+    return this.data.snapshotBlockNumber
+  }
+
+  requiredBlockConfirmationEvents(toBlock: number) {
+    return this.data.RequiredBlockConfirmationChanged.filter(e => e.blockNumber <= toBlock)
+  }
+
+  requiredSignaturesEvents(toBlock: number) {
+    return this.data.RequiredSignaturesChanged.filter(e => e.blockNumber <= toBlock)
+  }
+
+  validatorAddedEvents(fromBlock: number) {
+    return this.data.ValidatorAdded.filter(e => e.blockNumber >= fromBlock)
+  }
+
+  validatorRemovedEvents(fromBlock: number) {
+    return this.data.ValidatorRemoved.filter(e => e.blockNumber >= fromBlock)
+  }
+}
+
+export const homeSnapshotProvider = new SnapshotProvider('home')
+export const foreignSnapshotProvider = new SnapshotProvider('foreign')

alm/src/services/ValidatorsCache.ts

@@ -0,0 +1,29 @@
+import { ConfirmationParam } from '../hooks/useMessageConfirmations'
+
+class ValidatorsCache {
+  private readonly store: { [key: string]: boolean }
+  private readonly dataStore: { [key: string]: ConfirmationParam }
+
+  constructor() {
+    this.store = {}
+    this.dataStore = {}
+  }
+
+  get(key: string) {
+    return this.store[key]
+  }
+
+  set(key: string, value: boolean) {
+    this.store[key] = value
+  }
+
+  getData(key: string) {
+    return this.dataStore[key]
+  }
+
+  setData(key: string, value: ConfirmationParam) {
+    this.dataStore[key] = value
+  }
+}
+
+export default new ValidatorsCache()

alm/src/setupTests.ts

@@ -0,0 +1,5 @@
+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom/extend-expect'

alm/src/state/StateProvider.tsx

@@ -0,0 +1,79 @@
+import React, { createContext, ReactNode } from 'react'
+import { useNetwork } from '../hooks/useNetwork'
+import {
+  HOME_RPC_URL,
+  FOREIGN_RPC_URL,
+  HOME_BRIDGE_ADDRESS,
+  FOREIGN_BRIDGE_ADDRESS,
+  HOME_NETWORK_NAME,
+  FOREIGN_NETWORK_NAME
+} from '../config/constants'
+import Web3 from 'web3'
+import { useBridgeContracts } from '../hooks/useBridgeContracts'
+import { Contract } from 'web3-eth-contract'
+import { foreignSnapshotProvider, homeSnapshotProvider } from '../services/SnapshotProvider'
+
+export interface BaseNetworkParams {
+  chainId: number
+  name: string
+  web3: Maybe<Web3>
+  bridgeAddress: string
+  bridgeContract: Maybe<Contract>
+}
+
+export interface StateContext {
+  home: BaseNetworkParams
+  foreign: BaseNetworkParams
+  loading: boolean
+}
+
+const initialState = {
+  home: {
+    chainId: 0,
+    name: '',
+    web3: null,
+    bridgeAddress: HOME_BRIDGE_ADDRESS,
+    bridgeContract: null
+  },
+  foreign: {
+    chainId: 0,
+    name: '',
+    web3: null,
+    bridgeAddress: FOREIGN_BRIDGE_ADDRESS,
+    bridgeContract: null
+  },
+  loading: true
+}
+
+const StateContext = createContext<StateContext>(initialState)
+
+export const StateProvider = ({ children }: { children: ReactNode }) => {
+  const homeNetwork = useNetwork(HOME_RPC_URL, homeSnapshotProvider)
+  const foreignNetwork = useNetwork(FOREIGN_RPC_URL, foreignSnapshotProvider)
+  const { homeBridge, foreignBridge } = useBridgeContracts({
+    homeWeb3: homeNetwork.web3,
+    foreignWeb3: foreignNetwork.web3
+  })
+
+  const value = {
+    home: {
+      bridgeAddress: HOME_BRIDGE_ADDRESS,
+      name: HOME_NETWORK_NAME,
+      bridgeContract: homeBridge,
+      ...homeNetwork
+    },
+    foreign: {
+      bridgeAddress: FOREIGN_BRIDGE_ADDRESS,
+      name: FOREIGN_NETWORK_NAME,
+      bridgeContract: foreignBridge,
+      ...foreignNetwork
+    },
+    loading: homeNetwork.loading || foreignNetwork.loading
+  }
+
+  return <StateContext.Provider value={value}>{children}</StateContext.Provider>
+}
+
+export const useStateProvider = (): StateContext => {
+  return React.useContext(StateContext)
+}

alm/src/themes/Dark.tsx

@@ -0,0 +1,22 @@
+const theme = {
+  backgroundColor: '#121212',
+  fontColor: '#f5f5f5',
+  buttonColor: '#f5f5f5',
+  colorPrimary: '#272727',
+  colorGrey: '#272727',
+  colorLightGrey: '#272727',
+  linkColor: '#ffffff',
+  success: {
+    textColor: '#00c9a7',
+    backgroundColor: '#004d40'
+  },
+  notRequired: {
+    textColor: '#bdbdbd',
+    backgroundColor: '#424242'
+  },
+  failed: {
+    textColor: '#EF5350',
+    backgroundColor: '#4E342E'
+  }
+}
+export default theme

alm/src/themes/GlobalStyle.tsx

@@ -0,0 +1,32 @@
+import { createGlobalStyle } from 'styled-components'
+
+import theme from './Light'
+
+type ThemeType = typeof theme
+
+export const GlobalStyle = createGlobalStyle<{ theme: ThemeType }>`
+  body {
+    margin: 0;
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+      'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+      sans-serif;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+  }
+  
+  :root {
+    --bg-color: ${props => props.theme.backgroundColor};
+    --font-color: ${props => props.theme.fontColor};
+    --button-color: ${props => props.theme.buttonColor};
+    --color-primary: ${props => props.theme.colorPrimary};
+    --color-grey: ${props => props.theme.colorGrey};
+    --color-lightGrey: ${props => props.theme.colorLightGrey};
+    --link-color: ${props => props.theme.linkColor};
+    --success-color: ${props => props.theme.success.textColor};
+    --success-bg-color: ${props => props.theme.success.backgroundColor};
+    --not-required-color: ${props => props.theme.notRequired.textColor};
+    --not-required-bg-color: ${props => props.theme.notRequired.backgroundColor};
+    --failed-color: ${props => props.theme.failed.textColor};
+    --failed-bg-color: ${props => props.theme.failed.backgroundColor};
+  }
+`

alm/src/themes/Light.ts

@@ -0,0 +1,22 @@
+const theme = {
+  backgroundColor: '#FFFFFF',
+  fontColor: 'rgba(0, 0, 0, 0.65)',
+  buttonColor: '#1890ff',
+  colorPrimary: '#BDBDBD',
+  colorGrey: '#1890ff',
+  colorLightGrey: '#1890ff',
+  linkColor: '#1890ff',
+  success: {
+    textColor: '#388E3C',
+    backgroundColor: 'rgba(0,201,167,.1)'
+  },
+  notRequired: {
+    textColor: '#77838f',
+    backgroundColor: 'rgba(119,131,143,.1)'
+  },
+  failed: {
+    textColor: '#de4437',
+    backgroundColor: 'rgba(222,68,55,.1)'
+  }
+}
+export default theme

alm/src/utils/__tests__/contracts.test.ts

@@ -0,0 +1,469 @@
+import 'jest'
+import { getRequiredBlockConfirmations, getRequiredSignatures, getValidatorList } from '../contract'
+import { Contract } from 'web3-eth-contract'
+import { SnapshotProvider } from '../../services/SnapshotProvider'
+
+describe('getRequiredBlockConfirmations', () => {
+  const methodsBuilder = (value: string) => ({
+    requiredBlockConfirmations: () => {
+      return {
+        call: () => {
+          return value
+        }
+      }
+    }
+  })
+
+  test('Should call requiredBlockConfirmations method if no events present', async () => {
+    const contract = ({
+      getPastEvents: () => {
+        return []
+      },
+      methods: methodsBuilder('1')
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      requiredBlockConfirmationEvents: () => {
+        return []
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const result = await getRequiredBlockConfirmations(contract, 10, snapshotProvider)
+
+    expect(result).toEqual(1)
+  })
+  test('Should not call to get events if block number was included in the snapshot', async () => {
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => []),
+      methods: methodsBuilder('3')
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      requiredBlockConfirmationEvents: () => {
+        return [
+          {
+            blockNumber: 8,
+            returnValues: {
+              requiredBlockConfirmations: '1'
+            }
+          }
+        ]
+      },
+      snapshotBlockNumber: () => {
+        return 15
+      }
+    } as unknown) as SnapshotProvider
+
+    const result = await getRequiredBlockConfirmations(contract, 10, snapshotProvider)
+
+    expect(result).toEqual(1)
+    expect(contract.getPastEvents).toBeCalledTimes(0)
+  })
+  test('Should call to get events if block number was not included in the snapshot', async () => {
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => [
+        {
+          blockNumber: 9,
+          returnValues: {
+            requiredBlockConfirmations: '2'
+          }
+        }
+      ]),
+      methods: methodsBuilder('3')
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      requiredBlockConfirmationEvents: () => {
+        return [
+          {
+            blockNumber: 8,
+            returnValues: {
+              requiredBlockConfirmations: '1'
+            }
+          }
+        ]
+      },
+      snapshotBlockNumber: () => {
+        return 8
+      }
+    } as unknown) as SnapshotProvider
+
+    const result = await getRequiredBlockConfirmations(contract, 10, snapshotProvider)
+
+    expect(result).toEqual(2)
+    expect(contract.getPastEvents).toBeCalledTimes(1)
+    expect(contract.getPastEvents).toHaveBeenCalledWith('RequiredBlockConfirmationChanged', {
+      fromBlock: 9,
+      toBlock: 10
+    })
+  })
+  test('Should use the most updated event', async () => {
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => [
+        {
+          blockNumber: 9,
+          returnValues: {
+            requiredBlockConfirmations: '2'
+          }
+        },
+        {
+          blockNumber: 11,
+          returnValues: {
+            requiredBlockConfirmations: '3'
+          }
+        }
+      ]),
+      methods: methodsBuilder('3')
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      requiredBlockConfirmationEvents: () => {
+        return []
+      },
+      snapshotBlockNumber: () => {
+        return 11
+      }
+    } as unknown) as SnapshotProvider
+
+    const result = await getRequiredBlockConfirmations(contract, 15, snapshotProvider)
+
+    expect(result).toEqual(3)
+    expect(contract.getPastEvents).toBeCalledTimes(1)
+    expect(contract.getPastEvents).toHaveBeenCalledWith('RequiredBlockConfirmationChanged', {
+      fromBlock: 12,
+      toBlock: 15
+    })
+  })
+})
+describe('getRequiredSignatures', () => {
+  test('Should not call to get events if block number was included in the snapshot', async () => {
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => [])
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      requiredSignaturesEvents: () => {
+        return [
+          {
+            blockNumber: 7,
+            returnValues: {
+              requiredSignatures: '1'
+            }
+          },
+          {
+            blockNumber: 8,
+            returnValues: {
+              requiredSignatures: '2'
+            }
+          }
+        ]
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const result = await getRequiredSignatures(contract, 10, snapshotProvider)
+
+    expect(result).toEqual(2)
+    expect(contract.getPastEvents).toBeCalledTimes(0)
+  })
+  test('Should call to get events if block number is higher than the snapshot block number', async () => {
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => [
+        {
+          blockNumber: 15,
+          returnValues: {
+            requiredSignatures: '3'
+          }
+        }
+      ])
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      requiredSignaturesEvents: () => {
+        return [
+          {
+            blockNumber: 7,
+            returnValues: {
+              requiredSignatures: '1'
+            }
+          },
+          {
+            blockNumber: 8,
+            returnValues: {
+              requiredSignatures: '2'
+            }
+          }
+        ]
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const result = await getRequiredSignatures(contract, 20, snapshotProvider)
+
+    expect(result).toEqual(3)
+    expect(contract.getPastEvents).toBeCalledTimes(1)
+    expect(contract.getPastEvents).toHaveBeenCalledWith('RequiredSignaturesChanged', {
+      fromBlock: 11,
+      toBlock: 20
+    })
+  })
+  test('Should use the most updated event before the block number', async () => {
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => [
+        {
+          blockNumber: 15,
+          returnValues: {
+            requiredSignatures: '4'
+          }
+        }
+      ])
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      requiredSignaturesEvents: () => {
+        return [
+          {
+            blockNumber: 5,
+            returnValues: {
+              requiredSignatures: '1'
+            }
+          },
+          {
+            blockNumber: 6,
+            returnValues: {
+              requiredSignatures: '2'
+            }
+          }
+        ]
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const result = await getRequiredSignatures(contract, 7, snapshotProvider)
+
+    expect(result).toEqual(2)
+    expect(contract.getPastEvents).toBeCalledTimes(0)
+  })
+})
+describe('getValidatorList', () => {
+  const validator1 = '0x45b96809336A8b714BFbdAB3E4B5e0fe5d839908'
+  const validator2 = '0xAe8bFfc8BBc6AAa9E21ED1E4e4957fe798BEA25f'
+  const validator3 = '0x285A6eB779be4db94dA65e2F3518B1c5F0f71244'
+  const methodsBuilder = (value: string[]) => ({
+    validatorList: () => {
+      return {
+        call: () => {
+          return value
+        }
+      }
+    }
+  })
+  test('Should return the current validator list if no events found', async () => {
+    const currentValidators = [validator1, validator2, validator3]
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => []),
+      methods: methodsBuilder(currentValidators)
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      validatorAddedEvents: () => {
+        return []
+      },
+      validatorRemovedEvents: () => {
+        return []
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const list = await getValidatorList(contract, 20, snapshotProvider)
+
+    expect(list.length).toEqual(3)
+    expect(list).toEqual(expect.arrayContaining(currentValidators))
+    expect(contract.getPastEvents).toBeCalledTimes(2)
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorAdded', {
+      fromBlock: 20
+    })
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorRemoved', {
+      fromBlock: 20
+    })
+  })
+  test('If validator was added later from snapshot it should not include it', async () => {
+    const currentValidators = [validator1, validator2, validator3]
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => []),
+      methods: methodsBuilder(currentValidators)
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      validatorAddedEvents: () => {
+        return [
+          {
+            blockNumber: 9,
+            returnValues: {
+              validator: validator3
+            },
+            event: 'ValidatorAdded'
+          }
+        ]
+      },
+      validatorRemovedEvents: () => {
+        return []
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const list = await getValidatorList(contract, 5, snapshotProvider)
+
+    expect(list.length).toEqual(2)
+    expect(list).toEqual(expect.arrayContaining([validator1, validator2]))
+    expect(contract.getPastEvents).toBeCalledTimes(2)
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorAdded', {
+      fromBlock: 11
+    })
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorRemoved', {
+      fromBlock: 11
+    })
+  })
+  test('If validator was added later from chain it should not include it', async () => {
+    const currentValidators = [validator1, validator2, validator3]
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(event => {
+        if (event === 'ValidatorAdded') {
+          return [
+            {
+              blockNumber: 9,
+              returnValues: {
+                validator: validator3
+              },
+              event: 'ValidatorAdded'
+            }
+          ]
+        } else {
+          return []
+        }
+      }),
+      methods: methodsBuilder(currentValidators)
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      validatorAddedEvents: () => {
+        return []
+      },
+      validatorRemovedEvents: () => {
+        return []
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const list = await getValidatorList(contract, 15, snapshotProvider)
+
+    expect(list.length).toEqual(2)
+    expect(list).toEqual(expect.arrayContaining([validator1, validator2]))
+    expect(contract.getPastEvents).toBeCalledTimes(2)
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorAdded', {
+      fromBlock: 15
+    })
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorRemoved', {
+      fromBlock: 15
+    })
+  })
+  test('If validator was removed later from snapshot it should include it', async () => {
+    const currentValidators = [validator1, validator2]
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(() => []),
+      methods: methodsBuilder(currentValidators)
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      validatorAddedEvents: () => {
+        return []
+      },
+      validatorRemovedEvents: () => {
+        return [
+          {
+            blockNumber: 9,
+            returnValues: {
+              validator: validator3
+            },
+            event: 'ValidatorRemoved'
+          }
+        ]
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const list = await getValidatorList(contract, 5, snapshotProvider)
+
+    expect(list.length).toEqual(3)
+    expect(list).toEqual(expect.arrayContaining([validator1, validator2, validator3]))
+    expect(contract.getPastEvents).toBeCalledTimes(2)
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorAdded', {
+      fromBlock: 11
+    })
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorRemoved', {
+      fromBlock: 11
+    })
+  })
+  test('If validator was removed later from chain it should include it', async () => {
+    const currentValidators = [validator1, validator2]
+    const contract = ({
+      getPastEvents: jest.fn().mockImplementation(event => {
+        if (event === 'ValidatorRemoved') {
+          return [
+            {
+              blockNumber: 9,
+              returnValues: {
+                validator: validator3
+              },
+              event: 'ValidatorRemoved'
+            }
+          ]
+        } else {
+          return []
+        }
+      }),
+      methods: methodsBuilder(currentValidators)
+    } as unknown) as Contract
+
+    const snapshotProvider = ({
+      validatorAddedEvents: () => {
+        return []
+      },
+      validatorRemovedEvents: () => {
+        return []
+      },
+      snapshotBlockNumber: () => {
+        return 10
+      }
+    } as unknown) as SnapshotProvider
+
+    const list = await getValidatorList(contract, 15, snapshotProvider)
+
+    expect(list.length).toEqual(3)
+    expect(list).toEqual(expect.arrayContaining([validator1, validator2, validator3]))
+    expect(contract.getPastEvents).toBeCalledTimes(2)
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorAdded', {
+      fromBlock: 15
+    })
+    expect(contract.getPastEvents).toHaveBeenCalledWith('ValidatorRemoved', {
+      fromBlock: 15
+    })
+  })
+})

alm/src/utils/__tests__/explorer.test.ts

@@ -0,0 +1,155 @@
+import 'jest'
+import {
+  getFailedTransactions,
+  getSuccessTransactions,
+  filterValidatorSignatureTransaction,
+  getExecutionFailedTransactionForMessage,
+  APITransaction,
+  getValidatorPendingTransactionsForMessage,
+  getExecutionPendingTransactionsForMessage
+} from '../explorer'
+import { EXECUTE_AFFIRMATION_HASH, EXECUTE_SIGNATURES_HASH, SUBMIT_SIGNATURE_HASH } from '../../config/constants'
+
+const messageData = '0x123456'
+const OTHER_HASH = 'aabbccdd'
+const bridgeAddress = '0xFe446bEF1DbF7AFE24E81e05BC8B271C1BA9a560'
+const otherAddress = '0xD4075FB57fCf038bFc702c915Ef9592534bED5c1'
+
+describe('getFailedTransactions', () => {
+  test('should only return failed transactions', async () => {
+    const transactions = [{ isError: '0' }, { isError: '1' }, { isError: '0' }, { isError: '1' }, { isError: '1' }]
+
+    const fetchAccountTransactions = jest.fn().mockImplementation(() => transactions)
+    const result = await getFailedTransactions('', '', 0, 1, '', fetchAccountTransactions)
+    expect(result.length).toEqual(3)
+  })
+})
+describe('getSuccessTransactions', () => {
+  test('should only return success transactions', async () => {
+    const transactions = [{ isError: '0' }, { isError: '1' }, { isError: '0' }, { isError: '1' }, { isError: '1' }]
+
+    const fetchAccountTransactions = jest.fn().mockImplementation(() => transactions)
+    const result = await getSuccessTransactions('', '', 0, 1, '', fetchAccountTransactions)
+    expect(result.length).toEqual(2)
+  })
+})
+describe('filterValidatorSignatureTransaction', () => {
+  test('should return submit signatures related transaction', () => {
+    const transactions = [
+      { input: `0x${SUBMIT_SIGNATURE_HASH}112233` },
+      { input: `0x${SUBMIT_SIGNATURE_HASH}123456` },
+      { input: `0x${OTHER_HASH}123456` },
+      { input: `0x${OTHER_HASH}112233` }
+    ] as APITransaction[]
+
+    const result = filterValidatorSignatureTransaction(transactions, messageData)
+    expect(result.length).toEqual(1)
+    expect(result[0]).toEqual({ input: `0x${SUBMIT_SIGNATURE_HASH}123456` })
+  })
+  test('should return execute affirmation related transaction', () => {
+    const transactions = [
+      { input: `0x${EXECUTE_AFFIRMATION_HASH}112233` },
+      { input: `0x${EXECUTE_AFFIRMATION_HASH}123456` },
+      { input: `0x${OTHER_HASH}123456` },
+      { input: `0x${OTHER_HASH}112233` }
+    ] as APITransaction[]
+
+    const result = filterValidatorSignatureTransaction(transactions, messageData)
+    expect(result.length).toEqual(1)
+    expect(result[0]).toEqual({ input: `0x${EXECUTE_AFFIRMATION_HASH}123456` })
+  })
+})
+describe('getExecutionFailedTransactionForMessage', () => {
+  test('should return failed transaction related to signatures execution', async () => {
+    const transactions = [
+      { input: `0x${EXECUTE_SIGNATURES_HASH}112233` },
+      { input: `0x${EXECUTE_SIGNATURES_HASH}123456` },
+      { input: `0x${OTHER_HASH}123456` },
+      { input: `0x${OTHER_HASH}112233` }
+    ] as APITransaction[]
+    const fetchAccountTransactions = jest.fn().mockImplementation(() => transactions)
+
+    const result = await getExecutionFailedTransactionForMessage(
+      {
+        account: '',
+        to: '',
+        messageData,
+        startTimestamp: 0,
+        endTimestamp: 1
+      },
+      fetchAccountTransactions
+    )
+    expect(result.length).toEqual(1)
+    expect(result[0]).toEqual({ input: `0x${EXECUTE_SIGNATURES_HASH}123456` })
+  })
+})
+describe('getValidatorPendingTransactionsForMessage', () => {
+  test('should return pending transaction for submit signature transaction', async () => {
+    const transactions = [
+      { input: `0x${SUBMIT_SIGNATURE_HASH}112233`, to: bridgeAddress },
+      { input: `0x${SUBMIT_SIGNATURE_HASH}123456`, to: bridgeAddress },
+      { input: `0x${SUBMIT_SIGNATURE_HASH}123456`, to: otherAddress },
+      { input: `0x${OTHER_HASH}123456`, to: bridgeAddress },
+      { input: `0x${OTHER_HASH}112233`, to: bridgeAddress }
+    ] as APITransaction[]
+    const fetchAccountTransactions = jest.fn().mockImplementation(() => transactions)
+
+    const result = await getValidatorPendingTransactionsForMessage(
+      {
+        account: '',
+        to: bridgeAddress,
+        messageData
+      },
+      fetchAccountTransactions
+    )
+
+    expect(result.length).toEqual(1)
+    expect(result[0]).toEqual({ input: `0x${SUBMIT_SIGNATURE_HASH}123456`, to: bridgeAddress })
+  })
+  test('should return pending transaction for execute affirmation transaction', async () => {
+    const transactions = [
+      { input: `0x${EXECUTE_AFFIRMATION_HASH}112233`, to: bridgeAddress },
+      { input: `0x${EXECUTE_AFFIRMATION_HASH}123456`, to: bridgeAddress },
+      { input: `0x${EXECUTE_AFFIRMATION_HASH}123456`, to: otherAddress },
+      { input: `0x${OTHER_HASH}123456`, to: bridgeAddress },
+      { input: `0x${OTHER_HASH}112233`, to: bridgeAddress }
+    ] as APITransaction[]
+    const fetchAccountTransactions = jest.fn().mockImplementation(() => transactions)
+
+    const result = await getValidatorPendingTransactionsForMessage(
+      {
+        account: '',
+        to: bridgeAddress,
+        messageData
+      },
+      fetchAccountTransactions
+    )
+
+    expect(result.length).toEqual(1)
+    expect(result[0]).toEqual({ input: `0x${EXECUTE_AFFIRMATION_HASH}123456`, to: bridgeAddress })
+  })
+})
+describe('getExecutionPendingTransactionsForMessage', () => {
+  test('should return pending transaction for signatures execution transaction', async () => {
+    const transactions = [
+      { input: `0x${EXECUTE_SIGNATURES_HASH}112233`, to: bridgeAddress },
+      { input: `0x${EXECUTE_SIGNATURES_HASH}123456`, to: bridgeAddress },
+      { input: `0x${EXECUTE_SIGNATURES_HASH}123456`, to: otherAddress },
+      { input: `0x${OTHER_HASH}123456`, to: bridgeAddress },
+      { input: `0x${OTHER_HASH}112233`, to: bridgeAddress }
+    ] as APITransaction[]
+    const fetchAccountTransactions = jest.fn().mockImplementation(() => transactions)
+
+    const result = await getExecutionPendingTransactionsForMessage(
+      {
+        account: '',
+        to: bridgeAddress,
+        messageData
+      },
+      fetchAccountTransactions
+    )
+
+    expect(result.length).toEqual(1)
+    expect(result[0]).toEqual({ input: `0x${EXECUTE_SIGNATURES_HASH}123456`, to: bridgeAddress })
+  })
+})

alm/src/utils/__tests__/getConfirmationsForTx.test.ts

@@ -0,0 +1,705 @@
+import 'jest'
+import { getConfirmationsForTx } from '../getConfirmationsForTx'
+import * as helpers from '../validatorConfirmationHelpers'
+import Web3 from 'web3'
+import { Contract } from 'web3-eth-contract'
+import { APIPendingTransaction, APITransaction } from '../explorer'
+import { VALIDATOR_CONFIRMATION_STATUS } from '../../config/constants'
+import { BasicConfirmationParam } from '../../hooks/useMessageConfirmations'
+
+jest.mock('../validatorConfirmationHelpers')
+
+const getValidatorSuccessTransaction = helpers.getValidatorSuccessTransaction as jest.Mock<any>
+const getValidatorConfirmation = helpers.getValidatorConfirmation as jest.Mock<any>
+const getValidatorFailedTransaction = helpers.getValidatorFailedTransaction as jest.Mock<any>
+const getValidatorPendingTransaction = helpers.getValidatorPendingTransaction as jest.Mock<any>
+
+const messageData = '0x111111111'
+const web3 = {
+  utils: {
+    soliditySha3Raw: (data: string) => `0xaaaa${data.replace('0x', '')}`
+  }
+} as Web3
+const validator1 = '0x45b96809336A8b714BFbdAB3E4B5e0fe5d839908'
+const validator2 = '0xAe8bFfc8BBc6AAa9E21ED1E4e4957fe798BEA25f'
+const validator3 = '0x285A6eB779be4db94dA65e2F3518B1c5F0f71244'
+const validatorList = [validator1, validator2, validator3]
+const bridgeContract = {} as Contract
+const confirmationContractMethod = () => {}
+const requiredSignatures = 2
+const waitingBlocksResolved = true
+let subscriptions: Array<number> = []
+const timestamp = 1594045859
+const getFailedTransactions = (): Promise<APITransaction[]> => Promise.resolve([])
+const getPendingTransactions = (): Promise<APIPendingTransaction[]> => Promise.resolve([])
+const getSuccessTransactions = (): Promise<APITransaction[]> => Promise.resolve([])
+
+const unsubscribe = () => {
+  subscriptions.forEach(s => {
+    clearTimeout(s)
+  })
+}
+
+beforeEach(() => {
+  // Clear all instances and calls to constructor and all methods:
+  getValidatorSuccessTransaction.mockClear()
+  getValidatorConfirmation.mockClear()
+  getValidatorFailedTransaction.mockClear()
+  getValidatorPendingTransaction.mockClear()
+  subscriptions = []
+})
+describe('getConfirmationsForTx', () => {
+  test('should set validator confirmations status when signatures collected even if validator transactions not found yet and set remaining validator as not required', async () => {
+    getValidatorConfirmation.mockImplementation(() => async (validator: string) => ({
+      validator,
+      status: validator !== validator3 ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+    }))
+    getValidatorSuccessTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+      txHash: '',
+      timestamp: 0
+    }))
+    getValidatorFailedTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: '',
+      timestamp: 0
+    }))
+    getValidatorPendingTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: '',
+      timestamp: 0
+    }))
+
+    const setResult = jest.fn()
+    const setSignatureCollected = jest.fn()
+    const setFailedConfirmations = jest.fn()
+    const setPendingConfirmations = jest.fn()
+
+    await getConfirmationsForTx(
+      messageData,
+      web3,
+      validatorList,
+      bridgeContract,
+      confirmationContractMethod,
+      setResult,
+      requiredSignatures,
+      setSignatureCollected,
+      waitingBlocksResolved,
+      subscriptions,
+      timestamp,
+      getFailedTransactions,
+      setFailedConfirmations,
+      getPendingTransactions,
+      setPendingConfirmations,
+      getSuccessTransactions
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(1)
+    expect(setResult).toBeCalledTimes(2)
+    expect(getValidatorConfirmation).toBeCalledTimes(1)
+    expect(getValidatorSuccessTransaction).toBeCalledTimes(1)
+    expect(setSignatureCollected).toBeCalledTimes(1)
+    expect(setSignatureCollected.mock.calls[0][0]).toEqual(true)
+
+    expect(getValidatorFailedTransaction).toBeCalledTimes(1)
+    expect(setFailedConfirmations).toBeCalledTimes(1)
+    expect(setFailedConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorPendingTransaction).toBeCalledTimes(0)
+    expect(setPendingConfirmations).toBeCalledTimes(1)
+    expect(setPendingConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(setResult.mock.calls[0][0]()).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED }
+      ])
+    )
+    expect(setResult.mock.calls[1][0]).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED }
+      ])
+    )
+  })
+  test('should set validator confirmations status when signatures not collected even if validator transactions not found yet', async () => {
+    getValidatorConfirmation.mockImplementation(() => async (validator: string) => ({
+      validator,
+      status: validator === validator3 ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+    }))
+    getValidatorSuccessTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+      txHash: '',
+      timestamp: 0
+    }))
+    getValidatorFailedTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: '',
+      timestamp: 0
+    }))
+    getValidatorPendingTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: '',
+      timestamp: 0
+    }))
+
+    const setResult = jest.fn()
+    const setSignatureCollected = jest.fn()
+    const setFailedConfirmations = jest.fn()
+    const setPendingConfirmations = jest.fn()
+
+    await getConfirmationsForTx(
+      messageData,
+      web3,
+      validatorList,
+      bridgeContract,
+      confirmationContractMethod,
+      setResult,
+      requiredSignatures,
+      setSignatureCollected,
+      waitingBlocksResolved,
+      subscriptions,
+      timestamp,
+      getFailedTransactions,
+      setFailedConfirmations,
+      getPendingTransactions,
+      setPendingConfirmations,
+      getSuccessTransactions
+    )
+
+    unsubscribe()
+
+    expect(setResult).toBeCalledTimes(2)
+    expect(getValidatorConfirmation).toBeCalledTimes(1)
+    expect(getValidatorSuccessTransaction).toBeCalledTimes(1)
+    expect(setSignatureCollected).toBeCalledTimes(1)
+    expect(setSignatureCollected.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorFailedTransaction).toBeCalledTimes(1)
+    expect(setFailedConfirmations).toBeCalledTimes(1)
+    expect(setFailedConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorPendingTransaction).toBeCalledTimes(1)
+    expect(setPendingConfirmations).toBeCalledTimes(1)
+    expect(setPendingConfirmations.mock.calls[0][0]).toEqual(false)
+  })
+  test('should set validator confirmations status, validator transactions and not retry', async () => {
+    getValidatorConfirmation.mockImplementation(() => async (validator: string) => ({
+      validator,
+      status: validator !== validator3 ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+    }))
+    getValidatorSuccessTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+      txHash: validatorData.validator !== validator3 ? '0x123' : '',
+      timestamp: validatorData.validator !== validator3 ? 123 : 0
+    }))
+    getValidatorFailedTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: '',
+      timestamp: 0
+    }))
+    getValidatorPendingTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: '',
+      timestamp: 0
+    }))
+
+    const setResult = jest.fn()
+    const setSignatureCollected = jest.fn()
+    const setFailedConfirmations = jest.fn()
+    const setPendingConfirmations = jest.fn()
+
+    await getConfirmationsForTx(
+      messageData,
+      web3,
+      validatorList,
+      bridgeContract,
+      confirmationContractMethod,
+      setResult,
+      requiredSignatures,
+      setSignatureCollected,
+      waitingBlocksResolved,
+      subscriptions,
+      timestamp,
+      getFailedTransactions,
+      setFailedConfirmations,
+      getPendingTransactions,
+      setPendingConfirmations,
+      getSuccessTransactions
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(0)
+    expect(setResult).toBeCalledTimes(2)
+    expect(getValidatorConfirmation).toBeCalledTimes(1)
+    expect(getValidatorSuccessTransaction).toBeCalledTimes(1)
+    expect(setSignatureCollected).toBeCalledTimes(1)
+    expect(setSignatureCollected.mock.calls[0][0]).toEqual(true)
+
+    expect(getValidatorFailedTransaction).toBeCalledTimes(1)
+    expect(setFailedConfirmations).toBeCalledTimes(1)
+    expect(setFailedConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorPendingTransaction).toBeCalledTimes(0)
+    expect(setPendingConfirmations).toBeCalledTimes(1)
+    expect(setPendingConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(setResult.mock.calls[0][0]()).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED }
+      ])
+    )
+    expect(setResult.mock.calls[1][0]).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED }
+      ])
+    )
+  })
+  test('should set validator confirmations status, validator transactions, keep failed found transaction and not retry', async () => {
+    const validator4 = '0x9d2dC11C342F4eF3C5491A048D0f0eBCd2D8f7C3'
+    const validatorList = [validator1, validator2, validator3, validator4]
+    getValidatorConfirmation.mockImplementation(() => async (validator: string) => ({
+      validator,
+      status:
+        validator !== validator3 && validator !== validator4
+          ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS
+          : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+    }))
+    getValidatorSuccessTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+      txHash: validatorData.validator !== validator3 && validatorData.validator !== validator4 ? '0x123' : '',
+      timestamp: validatorData.validator !== validator3 && validatorData.validator !== validator4 ? 123 : 0
+    }))
+    getValidatorFailedTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status:
+        validatorData.validator === validator3
+          ? VALIDATOR_CONFIRMATION_STATUS.FAILED
+          : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: validatorData.validator === validator3 ? '0x123' : '',
+      timestamp: validatorData.validator === validator3 ? 123 : 0
+    }))
+    getValidatorPendingTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: '',
+      timestamp: 0
+    }))
+
+    const setResult = jest.fn()
+    const setSignatureCollected = jest.fn()
+    const setFailedConfirmations = jest.fn()
+    const setPendingConfirmations = jest.fn()
+
+    await getConfirmationsForTx(
+      messageData,
+      web3,
+      validatorList,
+      bridgeContract,
+      confirmationContractMethod,
+      setResult,
+      requiredSignatures,
+      setSignatureCollected,
+      waitingBlocksResolved,
+      subscriptions,
+      timestamp,
+      getFailedTransactions,
+      setFailedConfirmations,
+      getPendingTransactions,
+      setPendingConfirmations,
+      getSuccessTransactions
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(0)
+    expect(setResult).toBeCalledTimes(2)
+    expect(getValidatorConfirmation).toBeCalledTimes(1)
+    expect(getValidatorSuccessTransaction).toBeCalledTimes(1)
+    expect(setSignatureCollected).toBeCalledTimes(1)
+    expect(setSignatureCollected.mock.calls[0][0]).toEqual(true)
+
+    expect(getValidatorFailedTransaction).toBeCalledTimes(1)
+    expect(setFailedConfirmations).toBeCalledTimes(1)
+    expect(setFailedConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorPendingTransaction).toBeCalledTimes(0)
+    expect(setPendingConfirmations).toBeCalledTimes(1)
+    expect(setPendingConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(setResult.mock.calls[0][0]()).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator4, status: VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED }
+      ])
+    )
+    expect(setResult.mock.calls[1][0]).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator4, status: VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED }
+      ])
+    )
+  })
+  test('should look for failed and pending transactions for not confirmed validators', async () => {
+    // Validator1 success
+    // Validator2 failed
+    // Validator3 Pending
+
+    getValidatorConfirmation.mockImplementation(() => async (validator: string) => ({
+      validator,
+      status: validator === validator1 ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+    }))
+    getValidatorSuccessTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+      txHash: validatorData.validator === validator1 ? '0x123' : '',
+      timestamp: validatorData.validator === validator1 ? 123 : 0
+    }))
+    getValidatorFailedTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status:
+        validatorData.validator === validator2
+          ? VALIDATOR_CONFIRMATION_STATUS.FAILED
+          : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: validatorData.validator === validator2 ? '0x123' : '',
+      timestamp: validatorData.validator === validator2 ? 123 : 0
+    }))
+    getValidatorPendingTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status:
+        validatorData.validator === validator3
+          ? VALIDATOR_CONFIRMATION_STATUS.PENDING
+          : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: validatorData.validator === validator3 ? '0x123' : '',
+      timestamp: validatorData.validator === validator3 ? 123 : 0
+    }))
+
+    const setResult = jest.fn()
+    const setSignatureCollected = jest.fn()
+    const setFailedConfirmations = jest.fn()
+    const setPendingConfirmations = jest.fn()
+
+    await getConfirmationsForTx(
+      messageData,
+      web3,
+      validatorList,
+      bridgeContract,
+      confirmationContractMethod,
+      setResult,
+      requiredSignatures,
+      setSignatureCollected,
+      waitingBlocksResolved,
+      subscriptions,
+      timestamp,
+      getFailedTransactions,
+      setFailedConfirmations,
+      getPendingTransactions,
+      setPendingConfirmations,
+      getSuccessTransactions
+    )
+
+    unsubscribe()
+
+    expect(setResult).toBeCalledTimes(2)
+    expect(getValidatorConfirmation).toBeCalledTimes(1)
+    expect(getValidatorSuccessTransaction).toBeCalledTimes(1)
+    expect(setSignatureCollected).toBeCalledTimes(1)
+    expect(setSignatureCollected.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorFailedTransaction).toBeCalledTimes(1)
+    expect(setFailedConfirmations).toBeCalledTimes(1)
+    expect(setFailedConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorPendingTransaction).toBeCalledTimes(1)
+    expect(setPendingConfirmations).toBeCalledTimes(1)
+    expect(setPendingConfirmations.mock.calls[0][0]).toEqual(true)
+
+    expect(setResult.mock.calls[0][0]()).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.PENDING, txHash: '0x123', timestamp: 123 }
+      ])
+    )
+    expect(setResult.mock.calls[1][0]).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.PENDING, txHash: '0x123', timestamp: 123 }
+      ])
+    )
+  })
+  test('should set as failed if enough signatures failed', async () => {
+    // Validator1 success
+    // Validator2 failed
+    // Validator3 failed
+
+    getValidatorConfirmation.mockImplementation(() => async (validator: string) => ({
+      validator,
+      status: validator === validator1 ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+    }))
+    getValidatorSuccessTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+      txHash: validatorData.validator === validator1 ? '0x123' : '',
+      timestamp: validatorData.validator === validator1 ? 123 : 0
+    }))
+    getValidatorFailedTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status:
+        validatorData.validator !== validator1
+          ? VALIDATOR_CONFIRMATION_STATUS.FAILED
+          : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: validatorData.validator !== validator1 ? '0x123' : '',
+      timestamp: validatorData.validator !== validator1 ? 123 : 0
+    }))
+    getValidatorPendingTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: '',
+      timestamp: 0
+    }))
+
+    const setResult = jest.fn()
+    const setSignatureCollected = jest.fn()
+    const setFailedConfirmations = jest.fn()
+    const setPendingConfirmations = jest.fn()
+
+    await getConfirmationsForTx(
+      messageData,
+      web3,
+      validatorList,
+      bridgeContract,
+      confirmationContractMethod,
+      setResult,
+      requiredSignatures,
+      setSignatureCollected,
+      waitingBlocksResolved,
+      subscriptions,
+      timestamp,
+      getFailedTransactions,
+      setFailedConfirmations,
+      getPendingTransactions,
+      setPendingConfirmations,
+      getSuccessTransactions
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(0)
+    expect(setResult).toBeCalledTimes(2)
+    expect(getValidatorConfirmation).toBeCalledTimes(1)
+    expect(getValidatorSuccessTransaction).toBeCalledTimes(1)
+    expect(setSignatureCollected).toBeCalledTimes(1)
+    expect(setSignatureCollected.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorFailedTransaction).toBeCalledTimes(1)
+    expect(setFailedConfirmations).toBeCalledTimes(1)
+    expect(setFailedConfirmations.mock.calls[0][0]).toEqual(true)
+
+    expect(getValidatorPendingTransaction).toBeCalledTimes(1)
+    expect(setPendingConfirmations).toBeCalledTimes(1)
+    expect(setPendingConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(setResult.mock.calls[0][0]()).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 }
+      ])
+    )
+    expect(setResult.mock.calls[1][0]).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 }
+      ])
+    )
+  })
+  test('should remove pending state after transaction mined', async () => {
+    // Validator1 success
+    // Validator2 failed
+    // Validator3 Pending
+
+    getValidatorConfirmation
+      .mockImplementationOnce(() => async (validator: string) => ({
+        validator,
+        status:
+          validator === validator1 ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+      }))
+      .mockImplementation(() => async (validator: string) => ({
+        validator,
+        status:
+          validator !== validator2 ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+      }))
+    getValidatorSuccessTransaction
+      .mockImplementationOnce(() => async (validatorData: BasicConfirmationParam) => ({
+        validator: validatorData.validator,
+        status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+        txHash: validatorData.validator === validator1 ? '0x123' : '',
+        timestamp: validatorData.validator === validator1 ? 123 : 0
+      }))
+      .mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+        validator: validatorData.validator,
+        status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+        txHash: validatorData.validator !== validator2 ? '0x123' : '',
+        timestamp: validatorData.validator !== validator2 ? 123 : 0
+      }))
+    getValidatorFailedTransaction.mockImplementation(() => async (validatorData: BasicConfirmationParam) => ({
+      validator: validatorData.validator,
+      status:
+        validatorData.validator === validator2
+          ? VALIDATOR_CONFIRMATION_STATUS.FAILED
+          : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      txHash: validatorData.validator === validator2 ? '0x123' : '',
+      timestamp: validatorData.validator === validator2 ? 123 : 0
+    }))
+    getValidatorPendingTransaction
+      .mockImplementationOnce(() => async (validatorData: BasicConfirmationParam) => ({
+        validator: validatorData.validator,
+        status:
+          validatorData.validator === validator3
+            ? VALIDATOR_CONFIRMATION_STATUS.PENDING
+            : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+        txHash: validatorData.validator === validator3 ? '0x123' : '',
+        timestamp: validatorData.validator === validator3 ? 123 : 0
+      }))
+      .mockImplementationOnce(() => async (validatorData: BasicConfirmationParam) => ({
+        validator: validatorData.validator,
+        status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+        txHash: '',
+        timestamp: 0
+      }))
+
+    const setResult = jest.fn()
+    const setSignatureCollected = jest.fn()
+    const setFailedConfirmations = jest.fn()
+    const setPendingConfirmations = jest.fn()
+
+    await getConfirmationsForTx(
+      messageData,
+      web3,
+      validatorList,
+      bridgeContract,
+      confirmationContractMethod,
+      setResult,
+      requiredSignatures,
+      setSignatureCollected,
+      waitingBlocksResolved,
+      subscriptions,
+      timestamp,
+      getFailedTransactions,
+      setFailedConfirmations,
+      getPendingTransactions,
+      setPendingConfirmations,
+      getSuccessTransactions
+    )
+
+    unsubscribe()
+
+    expect(setResult).toBeCalledTimes(2)
+    expect(getValidatorConfirmation).toBeCalledTimes(1)
+    expect(getValidatorSuccessTransaction).toBeCalledTimes(1)
+    expect(setSignatureCollected).toBeCalledTimes(1)
+    expect(setSignatureCollected.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorFailedTransaction).toBeCalledTimes(1)
+    expect(setFailedConfirmations).toBeCalledTimes(1)
+    expect(setFailedConfirmations.mock.calls[0][0]).toEqual(false)
+
+    expect(getValidatorPendingTransaction).toBeCalledTimes(1)
+    expect(setPendingConfirmations).toBeCalledTimes(1)
+    expect(setPendingConfirmations.mock.calls[0][0]).toEqual(true)
+
+    expect(setResult.mock.calls[0][0]()).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.PENDING, txHash: '0x123', timestamp: 123 }
+      ])
+    )
+    expect(setResult.mock.calls[1][0]).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.PENDING, txHash: '0x123', timestamp: 123 }
+      ])
+    )
+
+    await getConfirmationsForTx(
+      messageData,
+      web3,
+      validatorList,
+      bridgeContract,
+      confirmationContractMethod,
+      setResult,
+      requiredSignatures,
+      setSignatureCollected,
+      waitingBlocksResolved,
+      subscriptions,
+      timestamp,
+      getFailedTransactions,
+      setFailedConfirmations,
+      getPendingTransactions,
+      setPendingConfirmations,
+      getSuccessTransactions
+    )
+
+    unsubscribe()
+
+    expect(setResult).toBeCalledTimes(4)
+    expect(getValidatorConfirmation).toBeCalledTimes(2)
+    expect(getValidatorSuccessTransaction).toBeCalledTimes(2)
+    expect(setSignatureCollected).toBeCalledTimes(2)
+    expect(setSignatureCollected.mock.calls[0][0]).toEqual(false)
+    expect(setSignatureCollected.mock.calls[1][0]).toEqual(true)
+
+    expect(getValidatorFailedTransaction).toBeCalledTimes(2)
+    expect(setFailedConfirmations).toBeCalledTimes(2)
+    expect(setFailedConfirmations.mock.calls[0][0]).toEqual(false)
+    expect(setFailedConfirmations.mock.calls[1][0]).toEqual(false)
+
+    expect(getValidatorPendingTransaction).toBeCalledTimes(1)
+    expect(setPendingConfirmations).toBeCalledTimes(2)
+    expect(setPendingConfirmations.mock.calls[0][0]).toEqual(true)
+    expect(setPendingConfirmations.mock.calls[1][0]).toEqual(false)
+
+    expect(setResult.mock.calls[2][0]()).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS }
+      ])
+    )
+    expect(setResult.mock.calls[3][0]).toEqual(
+      expect.arrayContaining([
+        { validator: validator1, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 },
+        { validator: validator2, status: VALIDATOR_CONFIRMATION_STATUS.FAILED, txHash: '0x123', timestamp: 123 },
+        { validator: validator3, status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS, txHash: '0x123', timestamp: 123 }
+      ])
+    )
+  })
+})

alm/src/utils/__tests__/getFinalizationEvent.test.ts

@@ -0,0 +1,303 @@
+import 'jest'
+import { Contract, EventData } from 'web3-eth-contract'
+import Web3 from 'web3'
+import { getFinalizationEvent } from '../getFinalizationEvent'
+import { VALIDATOR_CONFIRMATION_STATUS } from '../../config/constants'
+
+const eventName = 'RelayedMessage'
+const timestamp = 1594045859
+const validator1 = '0x45b96809336A8b714BFbdAB3E4B5e0fe5d839908'
+const txHash = '0xdab36c9210e7e45fb82af10ffe4960461e41661dce0c9cd36b2843adaa1df156'
+
+const web3 = ({
+  eth: {
+    getTransactionReceipt: () => ({
+      from: validator1
+    }),
+    getBlock: () => ({ timestamp })
+  },
+  utils: {
+    toChecksumAddress: (a: string) => a
+  }
+} as unknown) as Web3
+const waitingBlocksResolved = true
+const message = {
+  id: '0x123',
+  data: '0x123456789'
+}
+const interval = 10000
+let subscriptions: Array<number> = []
+
+const event = {
+  transactionHash: txHash,
+  blockNumber: 5523145,
+  returnValues: {
+    status: true
+  }
+}
+
+const bridgeAddress = '0xFe446bEF1DbF7AFE24E81e05BC8B271C1BA9a560'
+
+const unsubscribe = () => {
+  subscriptions.forEach(s => {
+    clearTimeout(s)
+  })
+}
+
+beforeEach(() => {
+  subscriptions = []
+})
+describe('getFinalizationEvent', () => {
+  test('should get finalization event and not try to get failed or pending transactions', async () => {
+    const contract = ({
+      getPastEvents: () => {
+        return [event]
+      }
+    } as unknown) as Contract
+
+    const collectedSignaturesEvent = null
+    const setResult = jest.fn()
+    const getFailedExecution = jest.fn()
+    const setFailedExecution = jest.fn()
+    const getPendingExecution = jest.fn()
+    const setPendingExecution = jest.fn()
+
+    await getFinalizationEvent(
+      contract,
+      eventName,
+      web3,
+      setResult,
+      waitingBlocksResolved,
+      message,
+      interval,
+      subscriptions,
+      timestamp,
+      collectedSignaturesEvent,
+      getFailedExecution,
+      setFailedExecution,
+      getPendingExecution,
+      setPendingExecution
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(0)
+    expect(setResult).toBeCalledTimes(1)
+    expect(setResult.mock.calls[0][0]).toEqual({
+      validator: validator1,
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+      txHash,
+      timestamp,
+      executionResult: true
+    })
+
+    expect(getFailedExecution).toBeCalledTimes(0)
+    expect(setFailedExecution).toBeCalledTimes(0)
+
+    expect(getPendingExecution).toBeCalledTimes(0)
+    expect(setPendingExecution).toBeCalledTimes(0)
+  })
+  test('should retry to get finalization event and not try to get failed or pending transactions if foreign to home transaction', async () => {
+    const contract = ({
+      getPastEvents: () => {
+        return []
+      }
+    } as unknown) as Contract
+
+    const collectedSignaturesEvent = null
+    const setResult = jest.fn()
+    const getFailedExecution = jest.fn()
+    const setFailedExecution = jest.fn()
+    const getPendingExecution = jest.fn()
+    const setPendingExecution = jest.fn()
+
+    await getFinalizationEvent(
+      contract,
+      eventName,
+      web3,
+      setResult,
+      waitingBlocksResolved,
+      message,
+      interval,
+      subscriptions,
+      timestamp,
+      collectedSignaturesEvent,
+      getFailedExecution,
+      setFailedExecution,
+      getPendingExecution,
+      setPendingExecution
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(1)
+    expect(setResult).toBeCalledTimes(0)
+
+    expect(getFailedExecution).toBeCalledTimes(0)
+    expect(setFailedExecution).toBeCalledTimes(0)
+
+    expect(getPendingExecution).toBeCalledTimes(0)
+    expect(setPendingExecution).toBeCalledTimes(0)
+  })
+  test('should retry to get finalization event and try to get failed and pending transactions if home to foreign transaction', async () => {
+    const contract = ({
+      getPastEvents: () => {
+        return []
+      },
+      options: {
+        address: bridgeAddress
+      }
+    } as unknown) as Contract
+
+    const collectedSignaturesEvent = ({
+      returnValues: {
+        authorityResponsibleForRelay: validator1
+      }
+    } as unknown) as EventData
+    const setResult = jest.fn()
+    const getFailedExecution = jest.fn().mockResolvedValue([])
+    const setFailedExecution = jest.fn()
+    const getPendingExecution = jest.fn().mockResolvedValue([])
+    const setPendingExecution = jest.fn()
+
+    await getFinalizationEvent(
+      contract,
+      eventName,
+      web3,
+      setResult,
+      waitingBlocksResolved,
+      message,
+      interval,
+      subscriptions,
+      timestamp,
+      collectedSignaturesEvent,
+      getFailedExecution,
+      setFailedExecution,
+      getPendingExecution,
+      setPendingExecution
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(1)
+    expect(setResult).toBeCalledTimes(0)
+
+    expect(getFailedExecution).toBeCalledTimes(1)
+    expect(setFailedExecution).toBeCalledTimes(0)
+
+    expect(getPendingExecution).toBeCalledTimes(1)
+    expect(setPendingExecution).toBeCalledTimes(0)
+  })
+  test('should retry to get finalization event and not to try to get failed transaction if pending transactions found if home to foreign transaction', async () => {
+    const contract = ({
+      getPastEvents: () => {
+        return []
+      },
+      options: {
+        address: bridgeAddress
+      }
+    } as unknown) as Contract
+
+    const collectedSignaturesEvent = ({
+      returnValues: {
+        authorityResponsibleForRelay: validator1
+      }
+    } as unknown) as EventData
+    const setResult = jest.fn()
+    const getFailedExecution = jest.fn().mockResolvedValue([])
+    const setFailedExecution = jest.fn()
+    const getPendingExecution = jest.fn().mockResolvedValue([{ hash: txHash }])
+    const setPendingExecution = jest.fn()
+
+    await getFinalizationEvent(
+      contract,
+      eventName,
+      web3,
+      setResult,
+      waitingBlocksResolved,
+      message,
+      interval,
+      subscriptions,
+      timestamp,
+      collectedSignaturesEvent,
+      getFailedExecution,
+      setFailedExecution,
+      getPendingExecution,
+      setPendingExecution
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(1)
+    expect(setResult).toBeCalledTimes(1)
+    expect(setResult.mock.calls[0][0]).toEqual({
+      validator: validator1,
+      status: VALIDATOR_CONFIRMATION_STATUS.PENDING,
+      txHash,
+      timestamp: expect.any(Number),
+      executionResult: false
+    })
+
+    expect(getFailedExecution).toBeCalledTimes(0)
+    expect(setFailedExecution).toBeCalledTimes(0)
+
+    expect(getPendingExecution).toBeCalledTimes(1)
+    expect(setPendingExecution).toBeCalledTimes(1)
+  })
+  test('should retry to get finalization event even if failed transaction found if home to foreign transaction', async () => {
+    const contract = ({
+      getPastEvents: () => {
+        return []
+      },
+      options: {
+        address: bridgeAddress
+      }
+    } as unknown) as Contract
+
+    const collectedSignaturesEvent = ({
+      returnValues: {
+        authorityResponsibleForRelay: validator1
+      }
+    } as unknown) as EventData
+    const setResult = jest.fn()
+    const getFailedExecution = jest.fn().mockResolvedValue([{ timeStamp: timestamp, hash: txHash }])
+    const setFailedExecution = jest.fn()
+    const getPendingExecution = jest.fn().mockResolvedValue([])
+    const setPendingExecution = jest.fn()
+
+    await getFinalizationEvent(
+      contract,
+      eventName,
+      web3,
+      setResult,
+      waitingBlocksResolved,
+      message,
+      interval,
+      subscriptions,
+      timestamp,
+      collectedSignaturesEvent,
+      getFailedExecution,
+      setFailedExecution,
+      getPendingExecution,
+      setPendingExecution
+    )
+
+    unsubscribe()
+
+    expect(subscriptions.length).toEqual(1)
+    expect(setResult).toBeCalledTimes(1)
+    expect(setResult.mock.calls[0][0]).toEqual({
+      validator: validator1,
+      status: VALIDATOR_CONFIRMATION_STATUS.FAILED,
+      txHash,
+      timestamp: expect.any(Number),
+      executionResult: false
+    })
+
+    expect(getFailedExecution).toBeCalledTimes(1)
+    expect(setFailedExecution).toBeCalledTimes(1)
+
+    expect(getPendingExecution).toBeCalledTimes(1)
+    expect(setPendingExecution).toBeCalledTimes(0)
+  })
+})

alm/src/utils/contract.ts

@@ -0,0 +1,101 @@
+import { Contract } from 'web3-eth-contract'
+import { EventData } from 'web3-eth-contract'
+import { SnapshotProvider } from '../services/SnapshotProvider'
+
+export const getRequiredBlockConfirmations = async (
+  contract: Contract,
+  blockNumber: number,
+  snapshotProvider: SnapshotProvider
+) => {
+  const eventsFromSnapshot = snapshotProvider.requiredBlockConfirmationEvents(blockNumber)
+  const snapshotBlockNumber = snapshotProvider.snapshotBlockNumber()
+
+  let contractEvents: EventData[] = []
+  if (blockNumber > snapshotBlockNumber) {
+    contractEvents = await contract.getPastEvents('RequiredBlockConfirmationChanged', {
+      fromBlock: snapshotBlockNumber + 1,
+      toBlock: blockNumber
+    })
+  }
+
+  const events = [...eventsFromSnapshot, ...contractEvents]
+
+  let blockConfirmations
+  if (events.length > 0) {
+    // Use the value from last event before the transaction
+    const event = events[events.length - 1]
+    blockConfirmations = event.returnValues.requiredBlockConfirmations
+  } else {
+    // This is a special case where RequiredBlockConfirmationChanged was not emitted during initialization in early versions of AMB
+    // of Sokol - Kovan. In this case the current value is used.
+    blockConfirmations = await contract.methods.requiredBlockConfirmations().call()
+  }
+  return parseInt(blockConfirmations)
+}
+
+export const getValidatorAddress = (contract: Contract) => contract.methods.validatorContract().call()
+
+export const getRequiredSignatures = async (
+  contract: Contract,
+  blockNumber: number,
+  snapshotProvider: SnapshotProvider
+) => {
+  const eventsFromSnapshot = snapshotProvider.requiredSignaturesEvents(blockNumber)
+  const snapshotBlockNumber = snapshotProvider.snapshotBlockNumber()
+
+  let contractEvents: EventData[] = []
+  if (blockNumber > snapshotBlockNumber) {
+    contractEvents = await contract.getPastEvents('RequiredSignaturesChanged', {
+      fromBlock: snapshotBlockNumber + 1,
+      toBlock: blockNumber
+    })
+  }
+
+  const events = [...eventsFromSnapshot, ...contractEvents]
+
+  // Use the value form last event before the transaction
+  const event = events[events.length - 1]
+  const { requiredSignatures } = event.returnValues
+  return parseInt(requiredSignatures)
+}
+
+export const getValidatorList = async (contract: Contract, blockNumber: number, snapshotProvider: SnapshotProvider) => {
+  const addedEventsFromSnapshot = snapshotProvider.validatorAddedEvents(blockNumber)
+  const removedEventsFromSnapshot = snapshotProvider.validatorRemovedEvents(blockNumber)
+  const snapshotBlockNumber = snapshotProvider.snapshotBlockNumber()
+
+  const fromBlock = snapshotBlockNumber > blockNumber ? snapshotBlockNumber + 1 : blockNumber
+  const [currentList, added, removed] = await Promise.all([
+    contract.methods.validatorList().call(),
+    contract.getPastEvents('ValidatorAdded', {
+      fromBlock
+    }),
+    contract.getPastEvents('ValidatorRemoved', {
+      fromBlock
+    })
+  ])
+
+  // Ordered desc
+  const orderedEvents = [...addedEventsFromSnapshot, ...added, ...removedEventsFromSnapshot, ...removed].sort(
+    ({ blockNumber: prev }, { blockNumber: next }) => next - prev
+  )
+
+  // Stored as a Set to avoid duplicates
+  const validatorList = new Set(currentList)
+
+  orderedEvents.forEach(e => {
+    const { validator } = e.returnValues
+    if (e.event === 'ValidatorRemoved') {
+      validatorList.add(validator)
+    } else if (e.event === 'ValidatorAdded') {
+      validatorList.delete(validator)
+    }
+  })
+
+  return Array.from(validatorList)
+}
+
+export const getMessagesSigned = (contract: Contract, hash: string) => contract.methods.messagesSigned(hash).call()
+
+export const getAffirmationsSigned = (contract: Contract, hash: string) =>
+  contract.methods.affirmationsSigned(hash).call()

alm/src/utils/executionWaitingForBlocks.ts

@@ -0,0 +1,58 @@
+import { BlockNumberProvider } from '../services/BlockNumberProvider'
+import { VALIDATOR_CONFIRMATION_STATUS } from '../config/constants'
+import { EventData } from 'web3-eth-contract'
+
+export const checkWaitingBlocksForExecution = async (
+  blockProvider: BlockNumberProvider,
+  interval: number,
+  targetBlock: number,
+  collectedSignaturesEvent: EventData,
+  setWaitingBlocksForExecution: Function,
+  setWaitingBlocksForExecutionResolved: Function,
+  setExecutionData: Function,
+  subscriptions: number[]
+) => {
+  const currentBlock = blockProvider.get()
+
+  if (currentBlock && currentBlock >= targetBlock) {
+    setExecutionData({
+      status: VALIDATOR_CONFIRMATION_STATUS.UNDEFINED,
+      validator: collectedSignaturesEvent.returnValues.authorityResponsibleForRelay,
+      txHash: '',
+      timestamp: 0,
+      executionResult: false
+    })
+    setWaitingBlocksForExecutionResolved(true)
+    setWaitingBlocksForExecution(false)
+    blockProvider.stop()
+  } else {
+    let nextInterval = interval
+    if (!currentBlock) {
+      nextInterval = 500
+    } else {
+      setWaitingBlocksForExecution(true)
+      setExecutionData({
+        status: VALIDATOR_CONFIRMATION_STATUS.WAITING,
+        validator: collectedSignaturesEvent.returnValues.authorityResponsibleForRelay,
+        txHash: '',
+        timestamp: 0,
+        executionResult: false
+      })
+    }
+    const timeoutId = setTimeout(
+      () =>
+        checkWaitingBlocksForExecution(
+          blockProvider,
+          interval,
+          targetBlock,
+          collectedSignaturesEvent,
+          setWaitingBlocksForExecution,
+          setWaitingBlocksForExecutionResolved,
+          setExecutionData,
+          subscriptions
+        ),
+      nextInterval
+    )
+    subscriptions.push(timeoutId)
+  }
+}

alm/src/utils/explorer.ts

@@ -0,0 +1,275 @@
+import {
+  EXECUTE_AFFIRMATION_HASH,
+  EXECUTE_SIGNATURES_HASH,
+  FOREIGN_EXPLORER_API,
+  HOME_EXPLORER_API,
+  SUBMIT_SIGNATURE_HASH
+} from '../config/constants'
+
+export interface APITransaction {
+  timeStamp: string
+  isError: string
+  input: string
+  to: string
+  hash: string
+}
+
+export interface APIPendingTransaction {
+  input: string
+  to: string
+  hash: string
+}
+
+export interface PendingTransactionsParams {
+  account: string
+  api: string
+}
+
+export interface AccountTransactionsParams {
+  account: string
+  to: string
+  startTimestamp: number
+  endTimestamp: number
+  api: string
+}
+
+export interface GetFailedTransactionParams {
+  account: string
+  to: string
+  messageData: string
+  startTimestamp: number
+  endTimestamp: number
+}
+
+export interface GetPendingTransactionParams {
+  account: string
+  to: string
+  messageData: string
+}
+
+export const fetchAccountTransactionsFromBlockscout = async ({
+  account,
+  to,
+  startTimestamp,
+  endTimestamp,
+  api
+}: AccountTransactionsParams): Promise<APITransaction[]> => {
+  const url = `${api}?module=account&action=txlist&address=${account}&filterby=from=${account}&to=${to}&starttimestamp=${startTimestamp}&endtimestamp=${endTimestamp}`
+
+  try {
+    const result = await fetch(url).then(res => res.json())
+    if (result.status === '0') {
+      return []
+    }
+
+    return result.result
+  } catch (e) {
+    console.log(e)
+    return []
+  }
+}
+
+export const getBlockByTimestampUrl = (api: string, timestamp: number) =>
+  `${api}&module=block&action=getblocknobytime&timestamp=${timestamp}&closest=before`
+
+export const fetchAccountTransactionsFromEtherscan = async ({
+  account,
+  to,
+  startTimestamp,
+  endTimestamp,
+  api
+}: AccountTransactionsParams): Promise<APITransaction[]> => {
+  const startBlockUrl = getBlockByTimestampUrl(api, startTimestamp)
+  const endBlockUrl = getBlockByTimestampUrl(api, endTimestamp)
+  let fromBlock = 0
+  let toBlock = 9999999999999
+  try {
+    const [fromBlockResult, toBlockResult] = await Promise.all([
+      fetch(startBlockUrl).then(res => res.json()),
+      fetch(endBlockUrl).then(res => res.json())
+    ])
+
+    if (fromBlockResult.status !== '0') {
+      fromBlock = parseInt(fromBlockResult.result)
+    }
+
+    if (toBlockResult.status !== '0') {
+      toBlock = parseInt(toBlockResult.result)
+    }
+  } catch (e) {
+    console.log(e)
+    return []
+  }
+
+  const url = `${api}&module=account&action=txlist&address=${account}&startblock=${fromBlock}&endblock=${toBlock}`
+
+  try {
+    const result = await fetch(url).then(res => res.json())
+
+    if (result.status === '0') {
+      return []
+    }
+
+    const toAddressLowerCase = to.toLowerCase()
+    const transactions: APITransaction[] = result.result
+    return transactions.filter(t => t.to.toLowerCase() === toAddressLowerCase)
+  } catch (e) {
+    console.log(e)
+    return []
+  }
+}
+
+export const fetchAccountTransactions = (api: string) => {
+  return api.includes('blockscout') ? fetchAccountTransactionsFromBlockscout : fetchAccountTransactionsFromEtherscan
+}
+
+export const fetchPendingTransactions = async ({
+  account,
+  api
+}: PendingTransactionsParams): Promise<APIPendingTransaction[]> => {
+  const url = `${api}?module=account&action=pendingtxlist&address=${account}`
+
+  try {
+    const result = await fetch(url).then(res => res.json())
+    if (result.status === '0') {
+      return []
+    }
+
+    return result.result
+  } catch (e) {
+    return []
+  }
+}
+
+export const getFailedTransactions = async (
+  account: string,
+  to: string,
+  startTimestamp: number,
+  endTimestamp: number,
+  api: string,
+  fetchAccountTransactions: (args: AccountTransactionsParams) => Promise<APITransaction[]>
+): Promise<APITransaction[]> => {
+  const transactions = await fetchAccountTransactions({ account, to, startTimestamp, endTimestamp, api })
+
+  return transactions.filter(t => t.isError !== '0')
+}
+
+export const getSuccessTransactions = async (
+  account: string,
+  to: string,
+  startTimestamp: number,
+  endTimestamp: number,
+  api: string,
+  fetchAccountTransactions: (args: AccountTransactionsParams) => Promise<APITransaction[]>
+): Promise<APITransaction[]> => {
+  const transactions = await fetchAccountTransactions({ account, to, startTimestamp, endTimestamp, api })
+
+  return transactions.filter(t => t.isError === '0')
+}
+
+export const filterValidatorSignatureTransaction = (
+  transactions: APITransaction[],
+  messageData: string
+): APITransaction[] => {
+  const messageDataValue = messageData.replace('0x', '')
+  return transactions.filter(
+    t =>
+      (t.input.includes(SUBMIT_SIGNATURE_HASH) || t.input.includes(EXECUTE_AFFIRMATION_HASH)) &&
+      t.input.includes(messageDataValue)
+  )
+}
+
+export const getValidatorFailedTransactionsForMessage = async ({
+  account,
+  to,
+  messageData,
+  startTimestamp,
+  endTimestamp
+}: GetFailedTransactionParams): Promise<APITransaction[]> => {
+  const failedTransactions = await getFailedTransactions(
+    account,
+    to,
+    startTimestamp,
+    endTimestamp,
+    HOME_EXPLORER_API,
+    fetchAccountTransactionsFromBlockscout
+  )
+
+  return filterValidatorSignatureTransaction(failedTransactions, messageData)
+}
+
+export const getValidatorSuccessTransactionsForMessage = async ({
+  account,
+  to,
+  messageData,
+  startTimestamp,
+  endTimestamp
+}: GetFailedTransactionParams): Promise<APITransaction[]> => {
+  const transactions = await getSuccessTransactions(
+    account,
+    to,
+    startTimestamp,
+    endTimestamp,
+    HOME_EXPLORER_API,
+    fetchAccountTransactionsFromBlockscout
+  )
+
+  return filterValidatorSignatureTransaction(transactions, messageData)
+}
+
+export const getExecutionFailedTransactionForMessage = async (
+  { account, to, messageData, startTimestamp, endTimestamp }: GetFailedTransactionParams,
+  getFailedTransactionsMethod = getFailedTransactions
+): Promise<APITransaction[]> => {
+  const failedTransactions = await getFailedTransactionsMethod(
+    account,
+    to,
+    startTimestamp,
+    endTimestamp,
+    FOREIGN_EXPLORER_API,
+    fetchAccountTransactions(FOREIGN_EXPLORER_API)
+  )
+
+  const messageDataValue = messageData.replace('0x', '')
+  return failedTransactions.filter(t => t.input.includes(EXECUTE_SIGNATURES_HASH) && t.input.includes(messageDataValue))
+}
+
+export const getValidatorPendingTransactionsForMessage = async (
+  { account, to, messageData }: GetPendingTransactionParams,
+  fetchPendingTransactionsMethod = fetchPendingTransactions
+): Promise<APIPendingTransaction[]> => {
+  const pendingTransactions = await fetchPendingTransactionsMethod({
+    account,
+    api: HOME_EXPLORER_API
+  })
+
+  const toAddressLowerCase = to.toLowerCase()
+  const messageDataValue = messageData.replace('0x', '')
+
+  return pendingTransactions.filter(
+    t =>
+      t.to.toLowerCase() === toAddressLowerCase &&
+      (t.input.includes(SUBMIT_SIGNATURE_HASH) || t.input.includes(EXECUTE_AFFIRMATION_HASH)) &&
+      t.input.includes(messageDataValue)
+  )
+}
+
+export const getExecutionPendingTransactionsForMessage = async (
+  { account, to, messageData }: GetPendingTransactionParams,
+  fetchPendingTransactionsMethod = fetchPendingTransactions
+): Promise<APIPendingTransaction[]> => {
+  const pendingTransactions = await fetchPendingTransactionsMethod({
+    account,
+    api: FOREIGN_EXPLORER_API
+  })
+
+  const toAddressLowerCase = to.toLowerCase()
+  const messageDataValue = messageData.replace('0x', '')
+
+  return pendingTransactions.filter(
+    t =>
+      t.to.toLowerCase() === toAddressLowerCase &&
+      t.input.includes(EXECUTE_SIGNATURES_HASH) &&
+      t.input.includes(messageDataValue)
+  )
+}

alm/src/utils/getCollectedSignaturesEvent.ts

@@ -0,0 +1,53 @@
+import Web3 from 'web3'
+import { Contract, EventData } from 'web3-eth-contract'
+import { homeBlockNumberProvider } from '../services/BlockNumberProvider'
+import { BLOCK_RANGE } from '../config/constants'
+
+export const getCollectedSignaturesEvent = async (
+  web3: Maybe<Web3>,
+  contract: Maybe<Contract>,
+  fromBlock: number,
+  toBlock: number,
+  messageHash: string,
+  setCollectedSignaturesEvent: Function,
+  subscriptions: number[]
+) => {
+  if (!web3 || !contract) return
+  const currentBlock = homeBlockNumberProvider.get()
+
+  let events: EventData[] = []
+  let securedToBlock = toBlock
+  if (currentBlock) {
+    // prevent errors if the toBlock parameter is bigger than the latest
+    securedToBlock = toBlock >= currentBlock ? currentBlock : toBlock
+    events = await contract.getPastEvents('CollectedSignatures', {
+      fromBlock,
+      toBlock: securedToBlock
+    })
+  }
+
+  const filteredEvents = events.filter(e => e.returnValues.messageHash === messageHash)
+
+  if (filteredEvents.length) {
+    const event = filteredEvents[0]
+    setCollectedSignaturesEvent(event)
+    homeBlockNumberProvider.stop()
+  } else {
+    const newFromBlock = currentBlock ? securedToBlock : fromBlock
+    const newToBlock = currentBlock ? toBlock + BLOCK_RANGE : toBlock
+    const timeoutId = setTimeout(
+      () =>
+        getCollectedSignaturesEvent(
+          web3,
+          contract,
+          newFromBlock,
+          newToBlock,
+          messageHash,
+          setCollectedSignaturesEvent,
+          subscriptions
+        ),
+      500
+    )
+    subscriptions.push(timeoutId)
+  }
+}

alm/src/utils/getConfirmationsForTx.ts

@@ -0,0 +1,182 @@
+import Web3 from 'web3'
+import { Contract } from 'web3-eth-contract'
+import { HOME_RPC_POLLING_INTERVAL, VALIDATOR_CONFIRMATION_STATUS } from '../config/constants'
+import {
+  GetFailedTransactionParams,
+  APITransaction,
+  APIPendingTransaction,
+  GetPendingTransactionParams
+} from './explorer'
+import {
+  getValidatorConfirmation,
+  getValidatorFailedTransaction,
+  getValidatorPendingTransaction,
+  getValidatorSuccessTransaction
+} from './validatorConfirmationHelpers'
+import { ConfirmationParam } from '../hooks/useMessageConfirmations'
+
+export const getConfirmationsForTx = async (
+  messageData: string,
+  web3: Maybe<Web3>,
+  validatorList: string[],
+  bridgeContract: Maybe<Contract>,
+  confirmationContractMethod: Function,
+  setResult: Function,
+  requiredSignatures: number,
+  setSignatureCollected: Function,
+  waitingBlocksResolved: boolean,
+  subscriptions: number[],
+  timestamp: number,
+  getFailedTransactions: (args: GetFailedTransactionParams) => Promise<APITransaction[]>,
+  setFailedConfirmations: Function,
+  getPendingTransactions: (args: GetPendingTransactionParams) => Promise<APIPendingTransaction[]>,
+  setPendingConfirmations: Function,
+  getSuccessTransactions: (args: GetFailedTransactionParams) => Promise<APITransaction[]>
+) => {
+  if (!web3 || !validatorList || !validatorList.length || !bridgeContract || !waitingBlocksResolved) return
+
+  // If all the information was not collected, then it should retry
+  let shouldRetry = false
+  const hashMsg = web3.utils.soliditySha3Raw(messageData)
+  let validatorConfirmations = await Promise.all(
+    validatorList.map(getValidatorConfirmation(web3, hashMsg, bridgeContract, confirmationContractMethod))
+  )
+
+  const successConfirmations = validatorConfirmations.filter(c => c.status === VALIDATOR_CONFIRMATION_STATUS.SUCCESS)
+
+  setResult((prevConfirmations: ConfirmationParam[]) => {
+    if (prevConfirmations && prevConfirmations.length) {
+      successConfirmations.forEach(validatorData => {
+        const index = prevConfirmations.findIndex(e => e.validator === validatorData.validator)
+        validatorConfirmations[index] = validatorData
+      })
+      return prevConfirmations
+    } else {
+      return validatorConfirmations
+    }
+  })
+
+  const notSuccessConfirmations = validatorConfirmations.filter(c => c.status !== VALIDATOR_CONFIRMATION_STATUS.SUCCESS)
+
+  // If signatures not collected, look for pending transactions
+  let pendingConfirmationsResult = false
+  if (successConfirmations.length !== requiredSignatures) {
+    // Check if confirmation is pending
+    const validatorPendingConfirmationsChecks = await Promise.all(
+      notSuccessConfirmations.map(getValidatorPendingTransaction(bridgeContract, messageData, getPendingTransactions))
+    )
+    const validatorPendingConfirmations = validatorPendingConfirmationsChecks.filter(
+      c => c.status === VALIDATOR_CONFIRMATION_STATUS.PENDING
+    )
+
+    validatorPendingConfirmations.forEach(validatorData => {
+      const index = validatorConfirmations.findIndex(e => e.validator === validatorData.validator)
+      validatorConfirmations[index] = validatorData
+    })
+
+    if (validatorPendingConfirmations.length > 0) {
+      pendingConfirmationsResult = true
+    }
+  }
+
+  const undefinedConfirmations = validatorConfirmations.filter(
+    c => c.status === VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+  )
+
+  // Check if confirmation failed
+  let failedConfirmationsResult = false
+  const validatorFailedConfirmationsChecks = await Promise.all(
+    undefinedConfirmations.map(
+      getValidatorFailedTransaction(bridgeContract, messageData, timestamp, getFailedTransactions)
+    )
+  )
+  const validatorFailedConfirmations = validatorFailedConfirmationsChecks.filter(
+    c => c.status === VALIDATOR_CONFIRMATION_STATUS.FAILED
+  )
+  validatorFailedConfirmations.forEach(validatorData => {
+    const index = validatorConfirmations.findIndex(e => e.validator === validatorData.validator)
+    validatorConfirmations[index] = validatorData
+  })
+  const messageConfirmationsFailed = validatorFailedConfirmations.length > validatorList.length - requiredSignatures
+  if (messageConfirmationsFailed) {
+    failedConfirmationsResult = true
+  }
+
+  const missingConfirmations = validatorConfirmations.filter(
+    c => c.status === VALIDATOR_CONFIRMATION_STATUS.UNDEFINED || c.status === VALIDATOR_CONFIRMATION_STATUS.PENDING
+  )
+
+  if (successConfirmations.length !== requiredSignatures && missingConfirmations.length > 0) {
+    shouldRetry = true
+  }
+
+  let signatureCollectedResult = false
+  if (successConfirmations.length === requiredSignatures) {
+    // If signatures collected, it should set other signatures not found as not required
+    const notRequiredConfirmations = missingConfirmations.map(c => ({
+      validator: c.validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.NOT_REQUIRED
+    }))
+
+    notRequiredConfirmations.forEach(validatorData => {
+      const index = validatorConfirmations.findIndex(e => e.validator === validatorData.validator)
+      validatorConfirmations[index] = validatorData
+    })
+    signatureCollectedResult = true
+  }
+
+  // get transactions from success signatures
+  const successConfirmationWithData = await Promise.all(
+    validatorConfirmations
+      .filter(c => c.status === VALIDATOR_CONFIRMATION_STATUS.SUCCESS)
+      .map(getValidatorSuccessTransaction(bridgeContract, messageData, timestamp, getSuccessTransactions))
+  )
+
+  const successConfirmationWithTxFound = successConfirmationWithData.filter(v => v.txHash !== '')
+
+  const updatedValidatorConfirmations = [...validatorConfirmations]
+
+  if (successConfirmationWithTxFound.length > 0) {
+    successConfirmationWithTxFound.forEach(validatorData => {
+      const index = updatedValidatorConfirmations.findIndex(e => e.validator === validatorData.validator)
+      updatedValidatorConfirmations[index] = validatorData
+    })
+  }
+
+  // Set results
+  setResult(updatedValidatorConfirmations)
+  setFailedConfirmations(failedConfirmationsResult)
+  setPendingConfirmations(pendingConfirmationsResult)
+  setSignatureCollected(signatureCollectedResult)
+
+  // Retry if not all transaction were found for validator confirmations
+  if (successConfirmationWithTxFound.length < successConfirmationWithData.length) {
+    shouldRetry = true
+  }
+
+  if (shouldRetry) {
+    const timeoutId = setTimeout(
+      () =>
+        getConfirmationsForTx(
+          messageData,
+          web3,
+          validatorList,
+          bridgeContract,
+          confirmationContractMethod,
+          setResult,
+          requiredSignatures,
+          setSignatureCollected,
+          waitingBlocksResolved,
+          subscriptions,
+          timestamp,
+          getFailedTransactions,
+          setFailedConfirmations,
+          getPendingTransactions,
+          setPendingConfirmations,
+          getSuccessTransactions
+        ),
+      HOME_RPC_POLLING_INTERVAL
+    )
+    subscriptions.push(timeoutId)
+  }
+}

alm/src/utils/getFinalizationEvent.ts

@@ -0,0 +1,137 @@
+import { Contract, EventData } from 'web3-eth-contract'
+import Web3 from 'web3'
+import { CACHE_KEY_EXECUTION_FAILED, THREE_DAYS_TIMESTAMP, VALIDATOR_CONFIRMATION_STATUS } from '../config/constants'
+import { ExecutionData } from '../hooks/useMessageConfirmations'
+import {
+  APIPendingTransaction,
+  APITransaction,
+  GetFailedTransactionParams,
+  GetPendingTransactionParams
+} from './explorer'
+import { getBlock, MessageObject } from './web3'
+import validatorsCache from '../services/ValidatorsCache'
+
+export const getFinalizationEvent = async (
+  contract: Maybe<Contract>,
+  eventName: string,
+  web3: Maybe<Web3>,
+  setResult: React.Dispatch<React.SetStateAction<ExecutionData>>,
+  waitingBlocksResolved: boolean,
+  message: MessageObject,
+  interval: number,
+  subscriptions: number[],
+  timestamp: number,
+  collectedSignaturesEvent: Maybe<EventData>,
+  getFailedExecution: (args: GetFailedTransactionParams) => Promise<APITransaction[]>,
+  setFailedExecution: Function,
+  getPendingExecution: (args: GetPendingTransactionParams) => Promise<APIPendingTransaction[]>,
+  setPendingExecution: Function
+) => {
+  if (!contract || !web3 || !waitingBlocksResolved) return
+  // Since it filters by the message id, only one event will be fetched
+  // so there is no need to limit the range of the block to reduce the network traffic
+  const events: EventData[] = await contract.getPastEvents(eventName, {
+    fromBlock: 0,
+    toBlock: 'latest',
+    filter: {
+      messageId: message.id
+    }
+  })
+  if (events.length > 0) {
+    const event = events[0]
+    const [txReceipt, block] = await Promise.all([
+      web3.eth.getTransactionReceipt(event.transactionHash),
+      getBlock(web3, event.blockNumber)
+    ])
+
+    const blockTimestamp = typeof block.timestamp === 'string' ? parseInt(block.timestamp) : block.timestamp
+    const validatorAddress = web3.utils.toChecksumAddress(txReceipt.from)
+
+    setResult({
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS,
+      validator: validatorAddress,
+      txHash: event.transactionHash,
+      timestamp: blockTimestamp,
+      executionResult: event.returnValues.status
+    })
+  } else {
+    // If event is defined, it means it is a message from Home to Foreign
+    if (collectedSignaturesEvent) {
+      const validator = collectedSignaturesEvent.returnValues.authorityResponsibleForRelay
+
+      const pendingTransactions = await getPendingExecution({
+        account: validator,
+        messageData: message.data,
+        to: contract.options.address
+      })
+
+      // If the transaction is pending it sets the status and avoid making the request for failed transactions
+      if (pendingTransactions.length > 0) {
+        const pendingTx = pendingTransactions[0]
+
+        const nowTimestamp = Math.floor(new Date().getTime() / 1000.0)
+
+        setResult({
+          status: VALIDATOR_CONFIRMATION_STATUS.PENDING,
+          validator: validator,
+          txHash: pendingTx.hash,
+          timestamp: nowTimestamp,
+          executionResult: false
+        })
+        setPendingExecution(true)
+      } else {
+        const validatorExecutionCacheKey = `${CACHE_KEY_EXECUTION_FAILED}${validator}-${message.id}`
+        const failedFromCache = validatorsCache.get(validatorExecutionCacheKey)
+
+        if (!failedFromCache) {
+          const failedTransactions = await getFailedExecution({
+            account: validator,
+            to: contract.options.address,
+            messageData: message.data,
+            startTimestamp: timestamp,
+            endTimestamp: timestamp + THREE_DAYS_TIMESTAMP
+          })
+
+          if (failedTransactions.length > 0) {
+            const failedTx = failedTransactions[0]
+
+            // If validator execution failed, we cache the result to avoid doing future requests for a result that won't change
+            validatorsCache.set(validatorExecutionCacheKey, true)
+
+            const timestamp = parseInt(failedTx.timeStamp)
+            setResult({
+              status: VALIDATOR_CONFIRMATION_STATUS.FAILED,
+              validator: validator,
+              txHash: failedTx.hash,
+              timestamp,
+              executionResult: false
+            })
+            setFailedExecution(true)
+          }
+        }
+      }
+    }
+
+    const timeoutId = setTimeout(
+      () =>
+        getFinalizationEvent(
+          contract,
+          eventName,
+          web3,
+          setResult,
+          waitingBlocksResolved,
+          message,
+          interval,
+          subscriptions,
+          timestamp,
+          collectedSignaturesEvent,
+          getFailedExecution,
+          setFailedExecution,
+          getPendingExecution,
+          setPendingExecution
+        ),
+      interval
+    )
+    subscriptions.push(timeoutId)
+  }
+}

alm/src/utils/networks.ts

@@ -0,0 +1,42 @@
+import { formatDistance } from 'date-fns'
+import {
+  CONFIRMATIONS_STATUS_DESCRIPTION,
+  CONFIRMATIONS_STATUS_DESCRIPTION_HOME,
+  TRANSACTION_STATUS_DESCRIPTION
+} from '../config/descriptions'
+import { FOREIGN_EXPLORER_TX_TEMPLATE, HOME_EXPLORER_TX_TEMPLATE } from '../config/constants'
+
+export const validTxHash = (txHash: string) => /^0x[a-fA-F0-9]{64}$/.test(txHash)
+
+export const formatTxHash = (txHash: string) => `${txHash.substring(0, 6)}...${txHash.substring(txHash.length - 4)}`
+
+export const getExplorerTxUrl = (txHash: string, isHome: boolean) => {
+  const template = isHome ? HOME_EXPLORER_TX_TEMPLATE : FOREIGN_EXPLORER_TX_TEMPLATE
+  return template.replace('%s', txHash)
+}
+
+export const formatTxHashExtended = (txHash: string) =>
+  `${txHash.substring(0, 10)}...${txHash.substring(txHash.length - 8)}`
+
+export const formatTimestamp = (timestamp: number): string => {
+  const txDate = new Date(0).setUTCSeconds(timestamp)
+  return formatDistance(txDate, new Date(), {
+    addSuffix: true
+  })
+}
+
+export const getTransactionStatusDescription = (status: string, timestamp: Maybe<number> = null) => {
+  let description = TRANSACTION_STATUS_DESCRIPTION[status]
+
+  if (timestamp) {
+    description = description.replace('%t', formatTimestamp(timestamp))
+  }
+
+  return description
+}
+
+export const getConfirmationsStatusDescription = (status: string, home: string, foreign: string, fromHome: boolean) => {
+  const statusDescription = fromHome ? CONFIRMATIONS_STATUS_DESCRIPTION_HOME : CONFIRMATIONS_STATUS_DESCRIPTION
+
+  return statusDescription[status]
+}

alm/src/utils/signatureWaitingForBlocks.ts

@@ -0,0 +1,50 @@
+import { VALIDATOR_CONFIRMATION_STATUS } from '../config/constants'
+import { BlockNumberProvider } from '../services/BlockNumberProvider'
+
+export const checkSignaturesWaitingForBLocks = async (
+  targetBlock: number,
+  setWaitingStatus: Function,
+  setWaitingBlocksResolved: Function,
+  validatorList: string[],
+  setConfirmations: Function,
+  blockProvider: BlockNumberProvider,
+  interval: number,
+  subscriptions: number[]
+) => {
+  const currentBlock = blockProvider.get()
+
+  if (currentBlock && currentBlock >= targetBlock) {
+    setWaitingBlocksResolved(true)
+    setWaitingStatus(false)
+    blockProvider.stop()
+  } else {
+    let nextInterval = interval
+    if (!currentBlock) {
+      nextInterval = 500
+    } else {
+      const validatorsWaiting = validatorList.map(validator => {
+        return {
+          validator,
+          status: VALIDATOR_CONFIRMATION_STATUS.WAITING
+        }
+      })
+      setWaitingStatus(true)
+      setConfirmations(validatorsWaiting)
+    }
+    const timeoutId = setTimeout(
+      () =>
+        checkSignaturesWaitingForBLocks(
+          targetBlock,
+          setWaitingStatus,
+          setWaitingBlocksResolved,
+          validatorList,
+          setConfirmations,
+          blockProvider,
+          interval,
+          subscriptions
+        ),
+      nextInterval
+    )
+    subscriptions.push(timeoutId)
+  }
+}

alm/src/utils/validatorConfirmationHelpers.ts

@@ -0,0 +1,172 @@
+import Web3 from 'web3'
+import { Contract } from 'web3-eth-contract'
+import { BasicConfirmationParam, ConfirmationParam } from '../hooks/useMessageConfirmations'
+import validatorsCache from '../services/ValidatorsCache'
+import {
+  CACHE_KEY_FAILED,
+  CACHE_KEY_SUCCESS,
+  ONE_DAY_TIMESTAMP,
+  VALIDATOR_CONFIRMATION_STATUS
+} from '../config/constants'
+import {
+  APIPendingTransaction,
+  APITransaction,
+  GetFailedTransactionParams,
+  GetPendingTransactionParams
+} from './explorer'
+
+export const getValidatorConfirmation = (
+  web3: Web3,
+  hashMsg: string,
+  bridgeContract: Contract,
+  confirmationContractMethod: Function
+) => async (validator: string): Promise<BasicConfirmationParam> => {
+  const hashSenderMsg = web3.utils.soliditySha3Raw(validator, hashMsg)
+
+  const signatureFromCache = validatorsCache.get(hashSenderMsg)
+  if (signatureFromCache) {
+    return {
+      validator,
+      status: VALIDATOR_CONFIRMATION_STATUS.SUCCESS
+    }
+  }
+
+  const confirmed = await confirmationContractMethod(bridgeContract, hashSenderMsg)
+  const status = confirmed ? VALIDATOR_CONFIRMATION_STATUS.SUCCESS : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+
+  // If validator confirmed signature, we cache the result to avoid doing future requests for a result that won't change
+  if (confirmed) {
+    validatorsCache.set(hashSenderMsg, confirmed)
+  }
+
+  return {
+    validator,
+    status
+  }
+}
+
+export const getValidatorSuccessTransaction = (
+  bridgeContract: Contract,
+  messageData: string,
+  timestamp: number,
+  getSuccessTransactions: (args: GetFailedTransactionParams) => Promise<APITransaction[]>
+) => async (validatorData: BasicConfirmationParam): Promise<ConfirmationParam> => {
+  const { validator } = validatorData
+  const validatorCacheKey = `${CACHE_KEY_SUCCESS}${validatorData.validator}-${messageData}`
+  const fromCache = validatorsCache.getData(validatorCacheKey)
+
+  if (fromCache && fromCache.txHash) {
+    return fromCache
+  }
+
+  const transactions = await getSuccessTransactions({
+    account: validatorData.validator,
+    to: bridgeContract.options.address,
+    messageData,
+    startTimestamp: timestamp,
+    endTimestamp: timestamp + ONE_DAY_TIMESTAMP
+  })
+
+  let txHashTimestamp = 0
+  let txHash = ''
+  const status = VALIDATOR_CONFIRMATION_STATUS.SUCCESS
+
+  if (transactions.length > 0) {
+    const tx = transactions[0]
+    txHashTimestamp = parseInt(tx.timeStamp)
+    txHash = tx.hash
+
+    // cache the result
+    validatorsCache.setData(validatorCacheKey, {
+      validator,
+      status,
+      txHash,
+      timestamp: txHashTimestamp
+    })
+  }
+
+  return {
+    validator,
+    status,
+    txHash,
+    timestamp: txHashTimestamp
+  }
+}
+
+export const getValidatorFailedTransaction = (
+  bridgeContract: Contract,
+  messageData: string,
+  timestamp: number,
+  getFailedTransactions: (args: GetFailedTransactionParams) => Promise<APITransaction[]>
+) => async (validatorData: BasicConfirmationParam): Promise<ConfirmationParam> => {
+  const validatorCacheKey = `${CACHE_KEY_FAILED}${validatorData.validator}-${messageData}`
+  const failedFromCache = validatorsCache.getData(validatorCacheKey)
+
+  if (failedFromCache && failedFromCache.txHash) {
+    return failedFromCache
+  }
+
+  const failedTransactions = await getFailedTransactions({
+    account: validatorData.validator,
+    to: bridgeContract.options.address,
+    messageData,
+    startTimestamp: timestamp,
+    endTimestamp: timestamp + ONE_DAY_TIMESTAMP
+  })
+  const newStatus =
+    failedTransactions.length > 0 ? VALIDATOR_CONFIRMATION_STATUS.FAILED : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+
+  let txHashTimestamp = 0
+  let txHash = ''
+  // If validator signature failed, we cache the result to avoid doing future requests for a result that won't change
+  if (failedTransactions.length > 0) {
+    const failedTx = failedTransactions[0]
+    txHashTimestamp = parseInt(failedTx.timeStamp)
+    txHash = failedTx.hash
+
+    validatorsCache.setData(validatorCacheKey, {
+      validator: validatorData.validator,
+      status: newStatus,
+      txHash,
+      timestamp: txHashTimestamp
+    })
+  }
+
+  return {
+    validator: validatorData.validator,
+    status: newStatus,
+    txHash,
+    timestamp: txHashTimestamp
+  }
+}
+
+export const getValidatorPendingTransaction = (
+  bridgeContract: Contract,
+  messageData: string,
+  getPendingTransactions: (args: GetPendingTransactionParams) => Promise<APIPendingTransaction[]>
+) => async (validatorData: BasicConfirmationParam): Promise<ConfirmationParam> => {
+  const failedTransactions = await getPendingTransactions({
+    account: validatorData.validator,
+    to: bridgeContract.options.address,
+    messageData
+  })
+
+  const newStatus =
+    failedTransactions.length > 0 ? VALIDATOR_CONFIRMATION_STATUS.PENDING : VALIDATOR_CONFIRMATION_STATUS.UNDEFINED
+
+  let timestamp = 0
+  let txHash = ''
+
+  if (failedTransactions.length > 0) {
+    const failedTx = failedTransactions[0]
+    timestamp = Math.floor(new Date().getTime() / 1000.0)
+    txHash = failedTx.hash
+  }
+
+  return {
+    validator: validatorData.validator,
+    status: newStatus,
+    txHash,
+    timestamp
+  }
+}

alm/src/utils/web3.ts

@@ -0,0 +1,72 @@
+import Web3 from 'web3'
+import { BlockTransactionString } from 'web3-eth'
+import { TransactionReceipt } from 'web3-eth'
+import { AbiItem } from 'web3-utils'
+import memoize from 'fast-memoize'
+import promiseRetry from 'promise-retry'
+import { HOME_AMB_ABI, FOREIGN_AMB_ABI } from '../abis'
+import { SnapshotProvider } from '../services/SnapshotProvider'
+
+export interface MessageObject {
+  id: string
+  data: string
+}
+
+const rawGetWeb3 = (url: string) => new Web3(new Web3.providers.HttpProvider(url))
+const memoized = memoize(rawGetWeb3)
+
+export const getWeb3 = (url: string) => memoized(url)
+
+export const filterEventsByAbi = (
+  txReceipt: TransactionReceipt,
+  web3: Web3,
+  bridgeAddress: string,
+  eventAbi: AbiItem
+): MessageObject[] => {
+  const eventHash = web3.eth.abi.encodeEventSignature(eventAbi)
+  const events = txReceipt.logs.filter(e => e.address === bridgeAddress && e.topics[0] === eventHash)
+
+  return events.map(e => {
+    let decodedLogs: { [p: string]: string } = {
+      messageId: '',
+      encodedData: ''
+    }
+    if (eventAbi && eventAbi.inputs && eventAbi.inputs.length) {
+      decodedLogs = web3.eth.abi.decodeLog(eventAbi.inputs, e.data, [e.topics[1]])
+    }
+    return { id: decodedLogs.messageId, data: decodedLogs.encodedData }
+  })
+}
+
+export const getHomeMessagesFromReceipt = (txReceipt: TransactionReceipt, web3: Web3, bridgeAddress: string) => {
+  const UserRequestForSignatureAbi: AbiItem = HOME_AMB_ABI.filter(
+    (e: AbiItem) => e.type === 'event' && e.name === 'UserRequestForSignature'
+  )[0]
+  return filterEventsByAbi(txReceipt, web3, bridgeAddress, UserRequestForSignatureAbi)
+}
+
+export const getForeignMessagesFromReceipt = (txReceipt: TransactionReceipt, web3: Web3, bridgeAddress: string) => {
+  const userRequestForAffirmationAbi: AbiItem = FOREIGN_AMB_ABI.filter(
+    (e: AbiItem) => e.type === 'event' && e.name === 'UserRequestForAffirmation'
+  )[0]
+  return filterEventsByAbi(txReceipt, web3, bridgeAddress, userRequestForAffirmationAbi)
+}
+
+// In some rare cases the block data is not available yet for the block of a new event detected
+// so this logic retry to get the block in case it fails
+export const getBlock = async (web3: Web3, blockNumber: number): Promise<BlockTransactionString> =>
+  promiseRetry(async retry => {
+    const result = await web3.eth.getBlock(blockNumber)
+    if (!result) {
+      return retry('Error getting block data')
+    }
+    return result
+  })
+
+export const getChainId = async (web3: Web3, snapshotProvider: SnapshotProvider) => {
+  let id = snapshotProvider.chainId()
+  if (id === 0) {
+    id = await web3.eth.getChainId()
+  }
+  return id
+}

alm/tsconfig.json

@@ -0,0 +1,25 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "module": "esnext",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "preserve"
+  },
+  "include": [
+    "src"
+  ]
+}

burner-wallet-plugin/.eslintrc.js

@@ -0,0 +1,31 @@
+module.exports = {
+  parser: "@typescript-eslint/parser", // Specifies the ESLint parser
+  extends: [
+    "plugin:react/recommended",
+    "plugin:@typescript-eslint/recommended", // Uses the recommended rules from @typescript-eslint/eslint-plugin
+    "../.eslintrc"
+  ],
+  parserOptions: {
+    ecmaVersion: 2018, // Allows for the parsing of modern ECMAScript features
+    sourceType: "module", // Allows for the use of imports
+    ecmaFeatures: {
+      jsx: true // Allows for the parsing of JSX
+    }
+  },
+  rules: {
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/no-explicit-any": "off", // Reduce the use of 'any'
+    "@typescript-eslint/no-non-null-assertion": "off",
+    "@typescript-eslint/no-var-requires": "off",
+    "react/prop-types": "off",
+    "@typescript-eslint/ban-ts-ignore": "off",
+    "@typescript-eslint/member-delimiter-style": "off",
+    "@typescript-eslint/indent": "off",
+    "@typescript-eslint/explicit-member-accessibility": "off"
+  },
+  settings: {
+    react: {
+      version: "detect",
+    }
+  }
+};

burner-wallet-plugin/Dockerfile

@@ -0,0 +1,30 @@
+FROM node:12 as plugin-base
+
+WORKDIR /mono
+COPY package.json .
+RUN mkdir -p contracts/node_modules
+
+COPY burner-wallet-plugin/package.json ./burner-wallet-plugin/
+COPY burner-wallet-plugin/lerna.json ./burner-wallet-plugin/
+COPY burner-wallet-plugin/yarn.lock ./burner-wallet-plugin/
+COPY burner-wallet-plugin/tsconfig.json ./burner-wallet-plugin/
+COPY burner-wallet-plugin/tokenbridge-bw-exchange/package.json ./burner-wallet-plugin/tokenbridge-bw-exchange/
+COPY burner-wallet-plugin/staging/package.json ./burner-wallet-plugin/staging/
+COPY burner-wallet-plugin/testing/package.json ./burner-wallet-plugin/testing/
+COPY yarn.lock .
+RUN yarn install --production --frozen-lockfile
+
+COPY ./burner-wallet-plugin/tokenbridge-bw-exchange ./burner-wallet-plugin/tokenbridge-bw-exchange
+RUN yarn build:plugin
+
+
+FROM plugin-base as testing
+COPY ./burner-wallet-plugin/testing ./burner-wallet-plugin/testing
+WORKDIR /mono/burner-wallet-plugin
+CMD ["yarn", "start-testing"]
+
+
+FROM plugin-base as staging
+COPY ./burner-wallet-plugin/staging ./burner-wallet-plugin/staging
+WORKDIR /mono/burner-wallet-plugin
+CMD ["yarn", "start-staging"]

burner-wallet-plugin/README.md

@@ -0,0 +1,41 @@
+# TokenBridge Burner Wallet 2 Plugin
+
+Please refer to the [Plugin README](./tokenrbdige-bw-exchange/README.md) for resources provided, instructions to install and use the plugin.
+
+### Setup
+1. [Initialize](../README.md#initializing-the-monorepository) the monorepository.
+2. Run `yarn build` or from the monorepository root `yarn build:plugin`
+
+### Run Burner Wallet with the plugin in Mainnet & Classic
+1. Create `.env` file in `staging` folder and set `REACT_APP_INFURA_KEY=<your key from infura.com>`
+2. Run `yarn start-staging` to start the wallet connected to Mainnet & Classic and interact with the ETH - WETC Bridge.
+
+### Run Burner Wallet with the plugin in Sokol & Kovan
+1. Create `.env` file in `testing` folder and set `REACT_APP_INFURA_KEY=<your key from infura.com>`. 
+Also, a private key can be set to start the wallet with the specified account `REACT_APP_PK=0x...`
+2. Run `yarn start-testing` to start the wallet connected to Sokol & Kovan and interact with a test bridge
+that works on top of the AMB bridge.
+
+### Docker Setup
+Docker can be used to build the services and run the testing and staging wallets.
+
+First you may want to create the `.env` files for testing and staging as mentioned before. This is optional before building the containers, variables can be passes later using `--env-file` or `--env` parameters in `docker run`.
+
+Build the services with docker-compose:
+```bash
+docker-compose build
+```
+
+### Run Burner Wallet with the plugin in Mainnet & Classic using Docker 
+```bash
+docker run -ti -p 8080:8080 -e PORT=8080 --rm burner-wallet-plugin_staging
+```
+
+### Run Burner Wallet with the plugin in Sokol & Kovan using Docker
+```bash
+docker run -ti -p 8080:8080 -e PORT=8080 --rm burner-wallet-plugin_testing
+```
+### Publish to npm
+In order to make this plugin accessible, it should be available as a npm package. Follow the [instructions](publish.md) to publish 
+the package to npm registry. 
+

burner-wallet-plugin/docker-compose.yml

@@ -0,0 +1,17 @@
+---
+version: '2.4'
+services:
+  staging:
+    build:
+      context: ..
+      dockerfile: burner-wallet-plugin/Dockerfile
+      target: staging
+    environment:
+      - NODE_ENV=production
+  testing:
+    build:
+      context: ..
+      dockerfile: burner-wallet-plugin/Dockerfile
+      target: testing
+    environment:
+      - NODE_ENV=production

burner-wallet-plugin/lerna.json

@@ -0,0 +1,10 @@
+{
+  "packages": [
+    "basic-wallet",
+    "local-wallet",
+    "tokenbridge-bw-exchange"
+  ],
+  "npmClient": "yarn",
+  "useWorkspaces": true,
+  "version": "independent"
+}

burner-wallet-plugin/package.json

@@ -0,0 +1,28 @@
+{
+  "name": "burner-wallet-plugin",
+  "description": "Burner Wallet 2 plugin",
+  "version": "1.0.0",
+  "license": "GPL-3.0-only",
+  "private": true,
+  "scripts": {
+    "install": "lerna bootstrap",
+    "build": "lerna run --ignore testing --ignore staging build --stream",
+    "lint": "eslint '*/**/*.{js,ts,tsx}' --ignore-path ../.eslintignore",
+    "start-staging": "lerna run --scope staging start --stream",
+    "start-testing": "lerna run --scope testing start --stream",
+    "test": "lerna run --ignore testing --ignore staging test --stream"
+  },
+  "workspaces": [
+    "staging",
+    "testing",
+    "tokenbridge-bw-exchange"
+  ],
+  "dependencies": {
+    "@types/color": "3.0.0",
+    "@typescript-eslint/eslint-plugin": "1.13.0",
+    "@typescript-eslint/parser": "1.13.0",
+    "eslint-plugin-react": "7.19.0",
+    "lerna": "3.16.4",
+    "typescript": "3.5.3"
+  }
+}

burner-wallet-plugin/publish.md

@@ -0,0 +1,36 @@
+## Plugin Package Information
+
+The package to be published gets its configuration from `tokenbridge/burner-wallet-plugin/tokenbridge-bw-exchange/package.json`
+
+```json
+{
+  "name": "tokenbridge-bw-exchange",
+  "version": "1.0.0",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "files": [
+    "/dist"
+  ]
+}
+```
+
+- `name` is the name of how package will be available in npm.
+- `main` is entry point for the package
+- `types` is the entry point for typescript types
+- `files` is the list of files included when publishing the package. So we have to run `yarn build` first to 
+generate the `dist` folder.
+
+## Steps to publish to npm
+
+1. Create account in https://www.npmjs.com/
+
+2. Go to `tokenbridge/burner-wallet-plugin/tokenbridge-bw-exchange/`
+
+3. Run `yarn build`. Make sure it generates the `dist` folder
+
+4. Update `version` in `tokenbridge/burner-wallet-plugin/tokenbridge-bw-exchange/package.json`
+5. Run `yarn login` and fill login information if required.
+6. Run `yarn publish --access public`.
+The prompt will ask for the new version, complete it with the version from `package.json`
+
+More information in https://classic.yarnpkg.com/en/docs/publishing-a-package/

burner-wallet-plugin/staging/.env.example

@@ -0,0 +1 @@
+REACT_APP_INFURA_KEY=