Update makefile.

Co-authored-by: colinlyguo <colinlyguo@scroll.io>
Co-authored-by: colin <102356659+colinlyguo@users.noreply.github.com>
Co-authored-by: HAOYUatHZ <37070449+HAOYUatHZ@users.noreply.github.com>

.github/workflows/bridge.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'bridge/**'
       - '.github/workflows/bridge.yml'
@@ -12,6 +14,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'bridge/**'
       - '.github/workflows/bridge.yml'
@@ -62,3 +66,11 @@ jobs:
         if [ -n "$(git status --porcelain)" ]; then
           exit 1
         fi
+  # docker-build:
+  #   runs-on: ubuntu-latest
+  #   steps:
+  #   - name: Checkout code
+  #     uses: actions/checkout@v2
+  #   - name: Set up Docker Buildx
+  #     uses: docker/setup-buildx-action@v2
+  #   - run: make docker

.github/workflows/common.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'common/**'
       - '.github/workflows/common.yml'
@@ -12,6 +14,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'common/**'
       - '.github/workflows/common.yml'

.github/workflows/contracts.yaml

@@ -2,22 +2,10 @@ name: Contracts
 
 on:
   push:
-    branches:
-      - master
-      - main
-      - prod
-      - release/*
-      - staging
     paths:
       - 'contracts/**'
       - '.github/workflows/contracts.yaml'
   pull_request:
-    branches:
-      - master
-      - main
-      - prod
-      - release/*
-      - staging
     paths:
       - 'contracts/**'
       - '.github/workflows/contracts.yaml'
@@ -40,6 +28,9 @@ jobs:
         uses: foundry-rs/foundry-toolchain@v1
         with:
           version: nightly
+      
+      - name: Setup LCOV
+        uses: hrishikesh-kadam/setup-lcov@v1
 
       - name: Install Node.js 14
         uses: actions/setup-node@v2
@@ -76,6 +67,22 @@ jobs:
       - name: Run foundry tests
         run: forge test -vvv
 
+      - name: Run foundry coverage
+        run : forge coverage --report lcov
+
+      - name : Prune coverage
+        run : lcov --remove ./lcov.info -o ./lcov.info.pruned 'src/mocks/*' 'src/test/*' 'scripts/*' 'node_modules/*' 'lib/*'
+
+      - name: Report code coverage
+        uses: zgosalvez/github-actions-report-lcov@v3
+        with:
+          coverage-files: contracts/lcov.info.pruned
+          minimum-coverage: 0
+          artifact-name: code-coverage-report
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          working-directory: contracts
+          update-comment: true
+
   hardhat:
     runs-on: ubuntu-latest
 

.github/workflows/coordinator.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'coordinator/**'
       - '.github/workflows/coordinator.yml'
@@ -12,6 +14,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'coordinator/**'
       - '.github/workflows/coordinator.yml'
@@ -58,3 +62,18 @@ jobs:
         if [ -n "$(git status --porcelain)" ]; then
           exit 1
         fi
+  # docker-build:
+  #   runs-on: ubuntu-latest
+  #   steps:
+  #   - name: Checkout code
+  #     uses: actions/checkout@v2
+  #   - name: Set up Docker Buildx
+  #     uses: docker/setup-buildx-action@v2
+  #   - name: Build and push
+  #     uses: docker/build-push-action@v2
+  #     with:
+  #       context: .
+  #       file: ./build/dockerfiles/coordinator.Dockerfile
+  #       push: false
+  #       # cache-from: type=gha,scope=${{ github.workflow }}
+  #       # cache-to: type=gha,scope=${{ github.workflow }}

.github/workflows/database.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'database/**'
       - '.github/workflows/database.yml'
@@ -12,6 +14,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'database/**'
       - '.github/workflows/database.yml'

.github/workflows/docker.yaml

@@ -0,0 +1,65 @@
+name: Docker
+
+on:
+  push:
+    tags:
+      - v**
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v2
+    - name: Login to Docker Hub
+      uses: docker/login-action@v2
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+    - name: Build and push coordinator docker
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        file: ./build/dockerfiles/coordinator.Dockerfile
+        push: true
+        tags: scrolltech/coordinator:${{github.ref_name}}
+        # cache-from: type=gha,scope=${{ github.workflow }}
+        # cache-to: type=gha,scope=${{ github.workflow }}
+    - name: Build and push event_watcher docker
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        file: ./build/dockerfiles/event_watcher.Dockerfile
+        push: true
+        tags: scrolltech/event-watcher:${{github.ref_name}}
+        # cache-from: type=gha,scope=${{ github.workflow }}
+        # cache-to: type=gha,scope=${{ github.workflow }}
+    - name: Build and push gas_oracle docker
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        file: ./build/dockerfiles/gas_oracle.Dockerfile
+        push: true
+        tags: scrolltech/gas-oracle:${{github.ref_name}}
+        # cache-from: type=gha,scope=${{ github.workflow }}
+        # cache-to: type=gha,scope=${{ github.workflow }}
+    - name: Build and push msg_relayer docker
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        file: ./build/dockerfiles/msg_relayer.Dockerfile
+        push: true
+        tags: scrolltech/msg-relayer:${{github.ref_name}}
+        # cache-from: type=gha,scope=${{ github.workflow }}
+        # cache-to: type=gha,scope=${{ github.workflow }}
+    - name: Build and push rollup_relayer docker
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        file: ./build/dockerfiles/rollup_relayer.Dockerfile
+        push: true
+        tags: scrolltech/rollup-relayer:${{github.ref_name}}
+        # cache-from: type=gha,scope=${{ github.workflow }}
+        # cache-to: type=gha,scope=${{ github.workflow }}

.github/workflows/roller.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'roller/**'
       - '.github/workflows/roller.yml'
@@ -12,6 +14,8 @@ on:
     branches:
       - main
       - staging
+      - develop
+      - alpha
     paths:
       - 'roller/**'
       - '.github/workflows/roller.yml'

Jenkinsfile

@@ -24,11 +24,12 @@ pipeline {
                     steps {
                         sh 'make dev_docker'
                         sh 'make -C bridge mock_abi'
+                        sh 'make -C common/bytecode all'
                     }
                 }
                 stage('Check Bridge Compilation') {
                     steps {
-                        sh 'make -C bridge bridge'
+                        sh 'make -C bridge bridge_bins'
                     }
                 }
                 stage('Check Coordinator Compilation') {
@@ -42,16 +43,6 @@ pipeline {
                         sh 'make -C database db_cli'
                     }
                 }
-                stage('Check Bridge Docker Build') {
-                    steps {
-                        sh 'make -C bridge docker'
-                    }
-                }
-                stage('Check Coordinator Docker Build') {
-                    steps {
-                        sh 'make -C coordinator docker'
-                    }
-                }
                 stage('Check Database Docker Build') {
                     steps {
                         sh 'make -C database docker'
@@ -61,44 +52,29 @@ pipeline {
         }
         stage('Parallel Test') {
             parallel{
-                stage('Test bridge package') {
+                stage('Race test common package') {
                     steps {
-                        sh 'go test -v -race -coverprofile=coverage.bridge.txt -covermode=atomic -p 1 scroll-tech/bridge/...'
-                    }
-                }
-                stage('Test common package') {
-                    steps {
-                        sh 'go test -v -race -coverprofile=coverage.common.txt -covermode=atomic -p 1 scroll-tech/common/...'
-                    }
-                }
-                stage('Test coordinator package') {
-                    steps {
-                        sh 'go test -v -race -coverprofile=coverage.coordinator.txt -covermode=atomic -p 1 scroll-tech/coordinator/...'
-                    }
-                }
-                stage('Test database package') {
-                    steps {
-                        sh 'go test -v -race -coverprofile=coverage.db.txt -covermode=atomic -p 1 scroll-tech/database/...'
-                    }
-                }
-                stage('Integration test') {
-                    steps {
-                        sh 'go test -v -race -tags="mock_prover mock_verifier" -coverprofile=coverage.integration.txt -covermode=atomic -p 1 scroll-tech/integration-test/...'
+                        sh 'go test -v -race -coverprofile=coverage.common.txt -covermode=atomic scroll-tech/common/...'
                     }
                 }
                 stage('Race test bridge package') {
                     steps {
-                        sh "cd bridge && go test -v -race -coverprofile=coverage.txt -covermode=atomic \$(go list ./... | grep -v 'database\\|common\\|l1\\|l2\\|coordinator')"
+                        sh "cd ./bridge && ../build/run_tests.sh bridge"
                     }
                 }
                 stage('Race test coordinator package') {
                     steps {
-                        sh "cd coordinator && go test -v -race -coverprofile=coverage.txt -covermode=atomic \$(go list ./... | grep -v 'database\\|common\\|l1\\|l2\\|coordinator')"
+                        sh "cd ./coordinator && ../build/run_tests.sh coordinator"
                     }
                 }
                 stage('Race test database package') {
                     steps {
-                        sh "cd database && go test -v -race -coverprofile=coverage.txt -covermode=atomic \$(go list ./... | grep -v 'database\\|common\\|l1\\|l2\\|coordinator')"
+                        sh 'go test -v -race -coverprofile=coverage.db.txt -covermode=atomic scroll-tech/database/...'
+                    }
+                }
+                stage('Integration test') {
+                    steps {
+                        sh 'go test -v -tags="mock_prover mock_verifier" -p 1 scroll-tech/integration-test/...'
                     }
                 }
             }

Makefile

@@ -16,11 +16,11 @@ lint: ## The code's format and security checks.
 
 update: ## update dependencies
 	go work sync
-	cd $(PWD)/bridge/ && go get -u github.com/scroll-tech/go-ethereum@staging && go mod tidy
-	cd $(PWD)/common/ && go get -u github.com/scroll-tech/go-ethereum@staging && go mod tidy
-	cd $(PWD)/coordinator/ && go get -u github.com/scroll-tech/go-ethereum@staging && go mod tidy
-	cd $(PWD)/database/ && go get -u github.com/scroll-tech/go-ethereum@staging && go mod tidy
-	cd $(PWD)/roller/ && go get -u github.com/scroll-tech/go-ethereum@staging && go mod tidy
+	cd $(PWD)/bridge/ && go get -u github.com/scroll-tech/go-ethereum@scroll && go mod tidy
+	cd $(PWD)/common/ && go get -u github.com/scroll-tech/go-ethereum@scroll && go mod tidy
+	cd $(PWD)/coordinator/ && go get -u github.com/scroll-tech/go-ethereum@scroll && go mod tidy
+	cd $(PWD)/database/ && go get -u github.com/scroll-tech/go-ethereum@scroll && go mod tidy
+	cd $(PWD)/roller/ && go get -u github.com/scroll-tech/go-ethereum@scroll && go mod tidy
 	goimports -local $(PWD)/bridge/ -w .
 	goimports -local $(PWD)/common/ -w .
 	goimports -local $(PWD)/coordinator/ -w .

README.md

@@ -1,3 +1,12 @@
 # Scroll Monorepo
 
 [![Contracts](https://github.com/scroll-tech/scroll/actions/workflows/contracts.yaml/badge.svg)](https://github.com/scroll-tech/scroll/actions/workflows/contracts.yaml) [![Bridge](https://github.com/scroll-tech/scroll/actions/workflows/bridge.yml/badge.svg)](https://github.com/scroll-tech/scroll/actions/workflows/bridge.yml) [![Coordinator](https://github.com/scroll-tech/scroll/actions/workflows/coordinator.yml/badge.svg)](https://github.com/scroll-tech/scroll/actions/workflows/coordinator.yml) [![Database](https://github.com/scroll-tech/scroll/actions/workflows/database.yml/badge.svg)](https://github.com/scroll-tech/scroll/actions/workflows/database.yml) [![Common](https://github.com/scroll-tech/scroll/actions/workflows/common.yml/badge.svg)](https://github.com/scroll-tech/scroll/actions/workflows/common.yml) [![Roller](https://github.com/scroll-tech/scroll/actions/workflows/roller.yml/badge.svg)](https://github.com/scroll-tech/scroll/actions/workflows/roller.yml)
+
+## Prerequisites
++ go1.18
++ rust (for version, see [rust-toolchain](./common/libzkp/impl/rust-toolchain))
++ hardhat / foundry
+
+---
+
+For a more comprehensive doc, see [`docs/`](./docs).

bridge/Makefile

@@ -8,8 +8,23 @@ mock_abi:
 	go run github.com/scroll-tech/go-ethereum/cmd/abigen --sol mock_bridge/MockBridgeL1.sol --pkg mock_bridge --out mock_bridge/MockBridgeL1.go
 	go run github.com/scroll-tech/go-ethereum/cmd/abigen --sol mock_bridge/MockBridgeL2.sol --pkg mock_bridge --out mock_bridge/MockBridgeL2.go
 
-bridge: ## Builds the Bridge instance.
-	go build -o $(PWD)/build/bin/bridge ./cmd
+bridge_bins: ## Builds the Bridge bins.
+	go build -o $(PWD)/build/bin/event_watcher ./cmd/event_watcher/
+	go build -o $(PWD)/build/bin/gas_oracle ./cmd/gas_oracle/
+	go build -o $(PWD)/build/bin/message_relayer ./cmd/msg_relayer/
+	go build -o $(PWD)/build/bin/rollup_relayer ./cmd/rollup_relayer/
+
+event_watcher: ## Builds the event_watcher bin
+	go build -o $(PWD)/build/bin/event_watcher ./cmd/event_watcher/
+
+gas_oracle: ## Builds the gas_oracle bin
+	go build -o $(PWD)/build/bin/gas_oracle ./cmd/gas_oracle/
+
+message_relayer: ## Builds the message_relayer bin
+	go build -o $(PWD)/build/bin/message_relayer ./cmd/msg_relayer/
+
+rollup_relayer: ## Builds the rollup_relayer bin
+	go build -o $(PWD)/build/bin/rollup_relayer ./cmd/rollup_relayer/
 
 test:
 	go test -v -race -coverprofile=coverage.txt -covermode=atomic -p 1 $(PWD)/...
@@ -20,8 +35,14 @@ lint: ## Lint the files - used for CI
 clean: ## Empty out the bin folder
 	@rm -rf build/bin
 
-docker:
-	DOCKER_BUILDKIT=1 docker build -t scrolltech/${IMAGE_NAME}:${IMAGE_VERSION} ${REPO_ROOT_DIR}/ -f ${REPO_ROOT_DIR}/build/dockerfiles/bridge.Dockerfile
-
 docker_push:
-	docker push scrolltech/${IMAGE_NAME}:${IMAGE_VERSION}
+	docker docker push scrolltech/gas-oracle:${IMAGE_VERSION}
+	docker docker push scrolltech/event-watcher:${IMAGE_VERSION}
+	docker docker push scrolltech/rollup-relayer:${IMAGE_VERSION}
+	docker docker push scrolltech/msg-relayer:${IMAGE_VERSION}
+
+docker:
+	DOCKER_BUILDKIT=1 docker build -t scrolltech/gas-oracle:${IMAGE_VERSION} ${REPO_ROOT_DIR}/ -f ${REPO_ROOT_DIR}/build/dockerfiles/gas_oracle.Dockerfile
+	DOCKER_BUILDKIT=1 docker build -t scrolltech/event-watcher:${IMAGE_VERSION} ${REPO_ROOT_DIR}/ -f ${REPO_ROOT_DIR}/build/dockerfiles/event_watcher.Dockerfile
+	DOCKER_BUILDKIT=1 docker build -t scrolltech/rollup-relayer:${IMAGE_VERSION} ${REPO_ROOT_DIR}/ -f ${REPO_ROOT_DIR}/build/dockerfiles/rollup_relayer.Dockerfile
+	DOCKER_BUILDKIT=1 docker build -t scrolltech/msg-relayer:${IMAGE_VERSION} ${REPO_ROOT_DIR}/ -f ${REPO_ROOT_DIR}/build/dockerfiles/msg_relayer.Dockerfile

bridge/abi/bridge_abi_test.go

@@ -10,69 +10,74 @@ import (
 	bridge_abi "scroll-tech/bridge/abi"
 )
 
-func TestPackRelayMessageWithProof(t *testing.T) {
+func TestEventSignature(t *testing.T) {
 	assert := assert.New(t)
 
-	l1MessengerABI, err := bridge_abi.L1MessengerMetaData.GetAbi()
+	assert.Equal(bridge_abi.L1SentMessageEventSignature, common.HexToHash("104371f3b442861a2a7b82a070afbbaab748bb13757bf47769e170e37809ec1e"))
+	assert.Equal(bridge_abi.L1RelayedMessageEventSignature, common.HexToHash("4641df4a962071e12719d8c8c8e5ac7fc4d97b927346a3d7a335b1f7517e133c"))
+	assert.Equal(bridge_abi.L1FailedRelayedMessageEventSignature, common.HexToHash("99d0e048484baa1b1540b1367cb128acd7ab2946d1ed91ec10e3c85e4bf51b8f"))
+
+	assert.Equal(bridge_abi.L1CommitBatchEventSignature, common.HexToHash("2cdc615c74452778c0fb6184735e014c13aad2b62774fe0b09bd1dcc2cc14a62"))
+	assert.Equal(bridge_abi.L1FinalizeBatchEventSignature, common.HexToHash("6be443154c959a7a1645b4392b6fa97d8e8ab6e8fd853d7085e8867083737d79"))
+
+	assert.Equal(bridge_abi.L1QueueTransactionEventSignature, common.HexToHash("bdcc7517f8fe3db6506dfd910942d0bbecaf3d6a506dadea65b0d988e75b9439"))
+
+	assert.Equal(bridge_abi.L2SentMessageEventSignature, common.HexToHash("104371f3b442861a2a7b82a070afbbaab748bb13757bf47769e170e37809ec1e"))
+	assert.Equal(bridge_abi.L2RelayedMessageEventSignature, common.HexToHash("4641df4a962071e12719d8c8c8e5ac7fc4d97b927346a3d7a335b1f7517e133c"))
+	assert.Equal(bridge_abi.L2FailedRelayedMessageEventSignature, common.HexToHash("99d0e048484baa1b1540b1367cb128acd7ab2946d1ed91ec10e3c85e4bf51b8f"))
+
+	assert.Equal(bridge_abi.L2ImportBlockEventSignature, common.HexToHash("a7823f45e1ee21f9530b77959b57507ad515a14fa9fa24d262ee80e79b2b5745"))
+
+	assert.Equal(bridge_abi.L2AppendMessageEventSignature, common.HexToHash("faa617c2d8ce12c62637dbce76efcc18dae60574aa95709bdcedce7e76071693"))
+}
+
+func TestPackRelayL2MessageWithProof(t *testing.T) {
+	assert := assert.New(t)
+	l1MessengerABI, err := bridge_abi.L1ScrollMessengerMetaData.GetAbi()
 	assert.NoError(err)
 
 	proof := bridge_abi.IL1ScrollMessengerL2MessageProof{
-		BlockHeight: big.NewInt(0),
-		BatchIndex:  big.NewInt(0),
+		BatchHash:   common.Hash{},
 		MerkleProof: make([]byte, 0),
 	}
-	_, err = l1MessengerABI.Pack("relayMessageWithProof", common.Address{}, common.Address{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), make([]byte, 0), proof)
+	_, err = l1MessengerABI.Pack("relayMessageWithProof", common.Address{}, common.Address{}, big.NewInt(0), big.NewInt(0), make([]byte, 0), proof)
 	assert.NoError(err)
 }
 
 func TestPackCommitBatch(t *testing.T) {
 	assert := assert.New(t)
 
-	l1RollupABI, err := bridge_abi.RollupMetaData.GetAbi()
+	scrollChainABI, err := bridge_abi.ScrollChainMetaData.GetAbi()
 	assert.NoError(err)
 
-	txns := make([]bridge_abi.IZKRollupLayer2Transaction, 5)
-	for i := 0; i < 5; i++ {
-		txns[i] = bridge_abi.IZKRollupLayer2Transaction{
-			Caller:   common.Address{},
-			Target:   common.Address{},
-			Nonce:    0,
-			Gas:      0,
-			GasPrice: big.NewInt(0),
-			Value:    big.NewInt(0),
-			Data:     make([]byte, 0),
-			R:        big.NewInt(0),
-			S:        big.NewInt(0),
-			V:        0,
-		}
+	header := bridge_abi.IScrollChainBlockContext{
+		BlockHash:       common.Hash{},
+		ParentHash:      common.Hash{},
+		BlockNumber:     0,
+		Timestamp:       0,
+		BaseFee:         big.NewInt(0),
+		GasLimit:        0,
+		NumTransactions: 0,
+		NumL1Messages:   0,
 	}
 
-	header := bridge_abi.IZKRollupLayer2BlockHeader{
-		BlockHash:   common.Hash{},
-		ParentHash:  common.Hash{},
-		BaseFee:     big.NewInt(0),
-		StateRoot:   common.Hash{},
-		BlockHeight: 0,
-		GasUsed:     0,
-		Timestamp:   0,
-		ExtraData:   make([]byte, 0),
-		Txs:         txns,
+	batch := bridge_abi.IScrollChainBatch{
+		Blocks:           []bridge_abi.IScrollChainBlockContext{header},
+		PrevStateRoot:    common.Hash{},
+		NewStateRoot:     common.Hash{},
+		WithdrawTrieRoot: common.Hash{},
+		BatchIndex:       0,
+		L2Transactions:   make([]byte, 0),
 	}
 
-	batch := bridge_abi.IZKRollupLayer2Batch{
-		BatchIndex: 0,
-		ParentHash: common.Hash{},
-		Blocks:     []bridge_abi.IZKRollupLayer2BlockHeader{header},
-	}
-
-	_, err = l1RollupABI.Pack("commitBatch", batch)
+	_, err = scrollChainABI.Pack("commitBatch", batch)
 	assert.NoError(err)
 }
 
 func TestPackFinalizeBatchWithProof(t *testing.T) {
 	assert := assert.New(t)
 
-	l1RollupABI, err := bridge_abi.RollupMetaData.GetAbi()
+	l1RollupABI, err := bridge_abi.ScrollChainMetaData.GetAbi()
 	assert.NoError(err)
 
 	proof := make([]*big.Int, 10)
@@ -86,12 +91,43 @@ func TestPackFinalizeBatchWithProof(t *testing.T) {
 	assert.NoError(err)
 }
 
-func TestPackRelayMessage(t *testing.T) {
+func TestPackRelayL1Message(t *testing.T) {
 	assert := assert.New(t)
 
-	l2MessengerABI, err := bridge_abi.L2MessengerMetaData.GetAbi()
+	l2MessengerABI, err := bridge_abi.L2ScrollMessengerMetaData.GetAbi()
 	assert.NoError(err)
 
-	_, err = l2MessengerABI.Pack("relayMessage", common.Address{}, common.Address{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), make([]byte, 0))
+	_, err = l2MessengerABI.Pack("relayMessage", common.Address{}, common.Address{}, big.NewInt(0), big.NewInt(0), make([]byte, 0))
+	assert.NoError(err)
+}
+
+func TestPackSetL1BaseFee(t *testing.T) {
+	assert := assert.New(t)
+
+	l1GasOracleABI, err := bridge_abi.L1GasPriceOracleMetaData.GetAbi()
+	assert.NoError(err)
+
+	baseFee := big.NewInt(2333)
+	_, err = l1GasOracleABI.Pack("setL1BaseFee", baseFee)
+	assert.NoError(err)
+}
+
+func TestPackSetL2BaseFee(t *testing.T) {
+	assert := assert.New(t)
+
+	l2GasOracleABI, err := bridge_abi.L2GasPriceOracleMetaData.GetAbi()
+	assert.NoError(err)
+
+	baseFee := big.NewInt(2333)
+	_, err = l2GasOracleABI.Pack("setL2BaseFee", baseFee)
+	assert.NoError(err)
+}
+
+func TestPackImportBlock(t *testing.T) {
+	assert := assert.New(t)
+
+	l1BlockContainerABI := bridge_abi.L1BlockContainerABI
+
+	_, err := l1BlockContainerABI.Pack("importBlockHeader", common.Hash{}, make([]byte, 0), false)
 	assert.NoError(err)
 }

bridge/cmd/app/app.go

@@ -1,130 +0,0 @@
-package app
-
-import (
-	"context"
-	"fmt"
-	"os"
-	"os/signal"
-
-	"github.com/scroll-tech/go-ethereum/log"
-	"github.com/urfave/cli/v2"
-
-	"scroll-tech/database"
-
-	"scroll-tech/common/metrics"
-	"scroll-tech/common/utils"
-	"scroll-tech/common/version"
-
-	"scroll-tech/bridge/config"
-	"scroll-tech/bridge/l1"
-	"scroll-tech/bridge/l2"
-)
-
-var (
-	app *cli.App
-)
-
-func init() {
-	// Set up Bridge app info.
-	app = cli.NewApp()
-
-	app.Action = action
-	app.Name = "bridge"
-	app.Usage = "The Scroll Bridge"
-	app.Version = version.Version
-	app.Flags = append(app.Flags, utils.CommonFlags...)
-	app.Flags = append(app.Flags, apiFlags...)
-
-	app.Before = func(ctx *cli.Context) error {
-		return utils.LogSetup(ctx)
-	}
-
-	// Register `bridge-test` app for integration-test.
-	utils.RegisterSimulation(app, "bridge-test")
-}
-
-func action(ctx *cli.Context) error {
-	// Load config file.
-	cfgFile := ctx.String(utils.ConfigFileFlag.Name)
-	cfg, err := config.NewConfig(cfgFile)
-	if err != nil {
-		log.Crit("failed to load config file", "config file", cfgFile, "error", err)
-	}
-
-	// Start metrics server.
-	metrics.Serve(context.Background(), ctx)
-
-	// Init db connection.
-	var ormFactory database.OrmFactory
-	if ormFactory, err = database.NewOrmFactory(cfg.DBConfig); err != nil {
-		log.Crit("failed to init db connection", "err", err)
-	}
-
-	var (
-		l1Backend *l1.Backend
-		l2Backend *l2.Backend
-	)
-	// @todo change nil to actual client after https://scroll-tech/bridge/pull/40 merged
-	l1Backend, err = l1.New(ctx.Context, cfg.L1Config, ormFactory)
-	if err != nil {
-		return err
-	}
-	l2Backend, err = l2.New(ctx.Context, cfg.L2Config, ormFactory)
-	if err != nil {
-		return err
-	}
-	defer func() {
-		l1Backend.Stop()
-		l2Backend.Stop()
-		err = ormFactory.Close()
-		if err != nil {
-			log.Error("can not close ormFactory", "error", err)
-		}
-	}()
-
-	// Start all modules.
-	if err = l1Backend.Start(); err != nil {
-		log.Crit("couldn't start l1 backend", "error", err)
-	}
-	if err = l2Backend.Start(); err != nil {
-		log.Crit("couldn't start l2 backend", "error", err)
-	}
-
-	// Register api and start rpc service.
-	if ctx.Bool(httpEnabledFlag.Name) {
-		handler, addr, err := utils.StartHTTPEndpoint(
-			fmt.Sprintf(
-				"%s:%d",
-				ctx.String(httpListenAddrFlag.Name),
-				ctx.Int(httpPortFlag.Name)),
-			l2Backend.APIs())
-		if err != nil {
-			log.Crit("Could not start RPC api", "error", err)
-		}
-		defer func() {
-			_ = handler.Shutdown(ctx.Context)
-			log.Info("HTTP endpoint closed", "url", fmt.Sprintf("http://%v/", addr))
-		}()
-		log.Info("HTTP endpoint opened", "url", fmt.Sprintf("http://%v/", addr))
-	}
-
-	log.Info("Start bridge successfully")
-
-	// Catch CTRL-C to ensure a graceful shutdown.
-	interrupt := make(chan os.Signal, 1)
-	signal.Notify(interrupt, os.Interrupt)
-
-	// Wait until the interrupt signal is received from an OS signal.
-	<-interrupt
-
-	return nil
-}
-
-// Run run bridge cmd instance.
-func Run() {
-	// Run the bridge.
-	if err := app.Run(os.Args); err != nil {
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		os.Exit(1)
-	}
-}

bridge/cmd/app/app_test.go

@@ -1,19 +0,0 @@
-package app
-
-import (
-	"fmt"
-	"testing"
-	"time"
-
-	"scroll-tech/common/cmd"
-	"scroll-tech/common/version"
-)
-
-func TestRunBridge(t *testing.T) {
-	bridge := cmd.NewCmd(t, "bridge-test", "--version")
-	defer bridge.WaitExit()
-
-	// wait result
-	bridge.ExpectWithTimeout(true, time.Second*3, fmt.Sprintf("bridge version %s", version.Version))
-	bridge.RunApp(nil)
-}

bridge/cmd/app/flags.go

@@ -1,31 +0,0 @@
-package app
-
-import (
-	"github.com/urfave/cli/v2"
-)
-
-var (
-	apiFlags = []cli.Flag{
-		&httpEnabledFlag,
-		&httpListenAddrFlag,
-		&httpPortFlag,
-	}
-	// httpEnabledFlag enable rpc server.
-	httpEnabledFlag = cli.BoolFlag{
-		Name:  "http",
-		Usage: "Enable the HTTP-RPC server",
-		Value: false,
-	}
-	// httpListenAddrFlag set the http address.
-	httpListenAddrFlag = cli.StringFlag{
-		Name:  "http.addr",
-		Usage: "HTTP-RPC server listening interface",
-		Value: "localhost",
-	}
-	// httpPortFlag set http.port.
-	httpPortFlag = cli.IntFlag{
-		Name:  "http.port",
-		Usage: "HTTP-RPC server listening port",
-		Value: 8290,
-	}
-)

bridge/cmd/event_watcher/app/app.go

@@ -0,0 +1,114 @@
+package app
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"time"
+
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/scroll-tech/go-ethereum/log"
+	"github.com/urfave/cli/v2"
+
+	"scroll-tech/database"
+
+	"scroll-tech/common/metrics"
+	"scroll-tech/common/version"
+
+	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/watcher"
+
+	cutils "scroll-tech/common/utils"
+)
+
+var (
+	app *cli.App
+)
+
+func init() {
+	// Set up event-watcher app info.
+	app = cli.NewApp()
+
+	app.Action = action
+	app.Name = "event-watcher"
+	app.Usage = "The Scroll Event Watcher"
+	app.Version = version.Version
+	app.Flags = append(app.Flags, cutils.CommonFlags...)
+	app.Commands = []*cli.Command{}
+
+	app.Before = func(ctx *cli.Context) error {
+		return cutils.LogSetup(ctx)
+	}
+
+	// Register `event-watcher-test` app for integration-test.
+	cutils.RegisterSimulation(app, cutils.EventWatcherApp)
+}
+
+func action(ctx *cli.Context) error {
+	// Load config file.
+	cfgFile := ctx.String(cutils.ConfigFileFlag.Name)
+	cfg, err := config.NewConfig(cfgFile)
+	if err != nil {
+		log.Crit("failed to load config file", "config file", cfgFile, "error", err)
+	}
+
+	subCtx, cancel := context.WithCancel(ctx.Context)
+	// Init db connection
+	var ormFactory database.OrmFactory
+	if ormFactory, err = database.NewOrmFactory(cfg.DBConfig); err != nil {
+		log.Crit("failed to init db connection", "err", err)
+	}
+
+	defer func() {
+		cancel()
+		err = ormFactory.Close()
+		if err != nil {
+			log.Error("can not close ormFactory", "error", err)
+		}
+	}()
+
+	// Start metrics server.
+	metrics.Serve(subCtx, ctx)
+	l1client, err := ethclient.Dial(cfg.L1Config.Endpoint)
+	if err != nil {
+		log.Error("failed to connect l1 geth", "config file", cfgFile, "error", err)
+		return err
+	}
+
+	l2client, err := ethclient.Dial(cfg.L2Config.Endpoint)
+	if err != nil {
+		log.Error("failed to connect l2 geth", "config file", cfgFile, "error", err)
+		return err
+	}
+	l1watcher := watcher.NewL1WatcherClient(ctx.Context, l1client, cfg.L1Config.StartHeight, cfg.L1Config.Confirmations, cfg.L1Config.L1MessengerAddress, cfg.L1Config.L1MessageQueueAddress, cfg.L1Config.ScrollChainContractAddress, ormFactory)
+	l2watcher := watcher.NewL2WatcherClient(ctx.Context, l2client, cfg.L2Config.Confirmations, cfg.L2Config.L2MessengerAddress, cfg.L2Config.L2MessageQueueAddress, cfg.L2Config.WithdrawTrieRootSlot, ormFactory)
+
+	go cutils.Loop(subCtx, 10*time.Second, func() {
+		if loopErr := l1watcher.FetchContractEvent(); loopErr != nil {
+			log.Error("Failed to fetch bridge contract", "err", loopErr)
+		}
+	})
+
+	// Start l2 watcher process
+	go cutils.Loop(subCtx, 2*time.Second, l2watcher.FetchContractEvent)
+	// Finish start all l2 functions
+	log.Info("Start event-watcher successfully")
+
+	// Catch CTRL-C to ensure a graceful shutdown.
+	interrupt := make(chan os.Signal, 1)
+	signal.Notify(interrupt, os.Interrupt)
+
+	// Wait until the interrupt signal is received from an OS signal.
+	<-interrupt
+
+	return nil
+}
+
+// Run event watcher cmd instance.
+func Run() {
+	if err := app.Run(os.Args); err != nil {
+		_, _ = fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}

bridge/cmd/event_watcher/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "scroll-tech/bridge/cmd/event_watcher/app"
+
+func main() {
+	app.Run()
+}

bridge/cmd/gas_oracle/app/app.go

@@ -0,0 +1,136 @@
+package app
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"time"
+
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/scroll-tech/go-ethereum/log"
+	"github.com/urfave/cli/v2"
+
+	"scroll-tech/database"
+
+	"scroll-tech/common/metrics"
+	"scroll-tech/common/version"
+
+	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/relayer"
+	"scroll-tech/bridge/utils"
+	"scroll-tech/bridge/watcher"
+
+	cutils "scroll-tech/common/utils"
+)
+
+var (
+	app *cli.App
+)
+
+func init() {
+	// Set up gas-oracle app info.
+	app = cli.NewApp()
+
+	app.Action = action
+	app.Name = "gas-oracle"
+	app.Usage = "The Scroll Gas Oracle"
+	app.Description = "Scroll Gas Oracle."
+	app.Version = version.Version
+	app.Flags = append(app.Flags, cutils.CommonFlags...)
+	app.Commands = []*cli.Command{}
+
+	app.Before = func(ctx *cli.Context) error {
+		return cutils.LogSetup(ctx)
+	}
+
+	// Register `gas-oracle-test` app for integration-test.
+	cutils.RegisterSimulation(app, cutils.GasOracleApp)
+}
+
+func action(ctx *cli.Context) error {
+	// Load config file.
+	cfgFile := ctx.String(cutils.ConfigFileFlag.Name)
+	cfg, err := config.NewConfig(cfgFile)
+	if err != nil {
+		log.Crit("failed to load config file", "config file", cfgFile, "error", err)
+	}
+	subCtx, cancel := context.WithCancel(ctx.Context)
+	// Init db connection
+	var ormFactory database.OrmFactory
+	if ormFactory, err = database.NewOrmFactory(cfg.DBConfig); err != nil {
+		log.Crit("failed to init db connection", "err", err)
+	}
+
+	defer func() {
+		cancel()
+		err = ormFactory.Close()
+		if err != nil {
+			log.Error("can not close ormFactory", "error", err)
+		}
+	}()
+	// Start metrics server.
+	metrics.Serve(subCtx, ctx)
+
+	l1client, err := ethclient.Dial(cfg.L1Config.Endpoint)
+	if err != nil {
+		log.Error("failed to connect l1 geth", "config file", cfgFile, "error", err)
+		return err
+	}
+
+	// Init l2geth connection
+	l2client, err := ethclient.Dial(cfg.L2Config.Endpoint)
+	if err != nil {
+		log.Error("failed to connect l2 geth", "config file", cfgFile, "error", err)
+		return err
+	}
+
+	l1watcher := watcher.NewL1WatcherClient(ctx.Context, l1client, cfg.L1Config.StartHeight, cfg.L1Config.Confirmations, cfg.L1Config.L1MessengerAddress, cfg.L1Config.L1MessageQueueAddress, cfg.L1Config.ScrollChainContractAddress, ormFactory)
+
+	l1relayer, err := relayer.NewLayer1Relayer(ctx.Context, ormFactory, cfg.L1Config.RelayerConfig)
+	if err != nil {
+		log.Error("failed to create new l1 relayer", "config file", cfgFile, "error", err)
+		return err
+	}
+	l2relayer, err := relayer.NewLayer2Relayer(ctx.Context, l2client, ormFactory, cfg.L2Config.RelayerConfig)
+	if err != nil {
+		log.Error("failed to create new l2 relayer", "config file", cfgFile, "error", err)
+		return err
+	}
+	// Start l1 watcher process
+	go cutils.LoopWithContext(subCtx, 10*time.Second, func(ctx context.Context) {
+		number, loopErr := utils.GetLatestConfirmedBlockNumber(ctx, l1client, cfg.L1Config.Confirmations)
+		if loopErr != nil {
+			log.Error("failed to get block number", "err", loopErr)
+			return
+		}
+
+		if loopErr = l1watcher.FetchBlockHeader(number); loopErr != nil {
+			log.Error("Failed to fetch L1 block header", "lastest", number, "err", loopErr)
+		}
+	})
+
+	// Start l1relayer process
+	go cutils.Loop(subCtx, 10*time.Second, l1relayer.ProcessGasPriceOracle)
+	go cutils.Loop(subCtx, 2*time.Second, l2relayer.ProcessGasPriceOracle)
+
+	// Finish start all message relayer functions
+	log.Info("Start gas-oracle successfully")
+
+	// Catch CTRL-C to ensure a graceful shutdown.
+	interrupt := make(chan os.Signal, 1)
+	signal.Notify(interrupt, os.Interrupt)
+
+	// Wait until the interrupt signal is received from an OS signal.
+	<-interrupt
+
+	return nil
+}
+
+// Run message_relayer cmd instance.
+func Run() {
+	if err := app.Run(os.Args); err != nil {
+		_, _ = fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}

bridge/cmd/gas_oracle/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "scroll-tech/bridge/cmd/gas_oracle/app"
+
+func main() {
+	app.Run()
+}

bridge/cmd/main.go

@@ -1,7 +0,0 @@
-package main
-
-import "scroll-tech/bridge/cmd/app"
-
-func main() {
-	app.Run()
-}

bridge/cmd/mock_app.go

@@ -0,0 +1,123 @@
+package app
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"testing"
+	"time"
+
+	"scroll-tech/common/cmd"
+	"scroll-tech/common/docker"
+	"scroll-tech/common/utils"
+
+	"scroll-tech/bridge/config"
+)
+
+// MockApp mockApp-test client manager.
+type MockApp struct {
+	Config *config.Config
+	base   *docker.App
+
+	mockApps map[utils.MockAppName]docker.AppAPI
+
+	originConfigFile string
+	BridgeConfigFile string
+
+	args []string
+}
+
+// NewBridgeApp return a new bridgeApp manager, name mush be one them.
+func NewBridgeApp(base *docker.App, file string) *MockApp {
+
+	bridgeFile := fmt.Sprintf("/tmp/%d_bridge-config.json", base.Timestamp)
+	bridgeApp := &MockApp{
+		base:             base,
+		mockApps:         make(map[utils.MockAppName]docker.AppAPI),
+		originConfigFile: file,
+		BridgeConfigFile: bridgeFile,
+		args:             []string{"--log.debug", "--config", bridgeFile},
+	}
+	if err := bridgeApp.MockConfig(true); err != nil {
+		panic(err)
+	}
+	return bridgeApp
+}
+
+// RunApp run bridge-test child process by multi parameters.
+func (b *MockApp) RunApp(t *testing.T, name utils.MockAppName, args ...string) {
+	if !(name == utils.EventWatcherApp ||
+		name == utils.GasOracleApp ||
+		name == utils.MessageRelayerApp ||
+		name == utils.RollupRelayerApp) {
+		t.Errorf(fmt.Sprintf("Don't support the mock app, name: %s", name))
+		return
+	}
+
+	if app, ok := b.mockApps[name]; ok {
+		t.Logf(fmt.Sprintf("%s already exist, free the current and recreate again", string(name)))
+		app.WaitExit()
+	}
+	appAPI := cmd.NewCmd(string(name), append(b.args, args...)...)
+	keyword := fmt.Sprintf("Start %s successfully", string(name)[:len(string(name))-len("-test")])
+	appAPI.RunApp(func() bool { return appAPI.WaitResult(t, time.Second*20, keyword) })
+	b.mockApps[name] = appAPI
+}
+
+// WaitExit wait util all processes exit.
+func (b *MockApp) WaitExit() {
+	for _, app := range b.mockApps {
+		app.WaitExit()
+	}
+	b.mockApps = make(map[utils.MockAppName]docker.AppAPI)
+}
+
+// Free stop and release bridge mocked apps.
+func (b *MockApp) Free() {
+	b.WaitExit()
+	_ = os.Remove(b.BridgeConfigFile)
+}
+
+// MockConfig creates a new bridge config.
+func (b *MockApp) MockConfig(store bool) error {
+	base := b.base
+	// Load origin bridge config file.
+	cfg, err := config.NewConfig(b.originConfigFile)
+	if err != nil {
+		return err
+	}
+
+	var (
+		l1Cfg, l2Cfg             = cfg.L1Config, cfg.L2Config
+		l1Contracts, l2Contracts = base.L1Contracts, base.L2Contracts
+	)
+	l1Cfg.Confirmations = 0
+
+	// set l1 and l2 chain endpoint.
+	l1Cfg.Endpoint = base.L1gethImg.Endpoint()
+	l2Cfg.RelayerConfig.SenderConfig.Endpoint = base.L1gethImg.Endpoint()
+	l2Cfg.Endpoint = base.L2gethImg.Endpoint()
+	l1Cfg.RelayerConfig.SenderConfig.Endpoint = base.L2gethImg.Endpoint()
+	cfg.DBConfig.DSN = base.DBImg.Endpoint()
+
+	// set l1 scroll contracts addresses.
+	l1Cfg.L1MessageQueueAddress = l1Contracts.L1MessageQueue
+	l1Cfg.ScrollChainContractAddress = l1Contracts.L1WETH
+	l1Cfg.L1MessengerAddress = l1Contracts.L1ScrollMessenger
+
+	// set l2 scroll contracts addresses.
+	l2Cfg.L2MessageQueueAddress = l2Contracts.L2MessageQueue
+	l2Cfg.L2MessengerAddress = l2Contracts.L2ScrollMessenger
+
+	b.Config = cfg
+
+	if !store {
+		return nil
+	}
+	// Store changed bridge config into a temp file.
+	data, err := json.Marshal(b.Config)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(b.BridgeConfigFile, data, 0600)
+}

bridge/cmd/msg_relayer/app/app.go

@@ -0,0 +1,118 @@
+package app
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"time"
+
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/scroll-tech/go-ethereum/log"
+	"github.com/urfave/cli/v2"
+
+	"scroll-tech/database"
+
+	"scroll-tech/common/metrics"
+	"scroll-tech/common/version"
+
+	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/relayer"
+
+	cutils "scroll-tech/common/utils"
+)
+
+var (
+	app *cli.App
+)
+
+func init() {
+	// Set up message-relayer app info.
+	app = cli.NewApp()
+
+	app.Action = action
+	app.Name = "message-relayer"
+	app.Usage = "The Scroll Message Relayer"
+	app.Description = "Message Relayer contains two main service: 1) relay l1 message to l2. 2) relay l2 message to l1."
+	app.Version = version.Version
+	app.Flags = append(app.Flags, cutils.CommonFlags...)
+	app.Commands = []*cli.Command{}
+
+	app.Before = func(ctx *cli.Context) error {
+		return cutils.LogSetup(ctx)
+	}
+
+	// Register `message-relayer-test` app for integration-test.
+	cutils.RegisterSimulation(app, cutils.MessageRelayerApp)
+}
+
+func action(ctx *cli.Context) error {
+	// Load config file.
+	cfgFile := ctx.String(cutils.ConfigFileFlag.Name)
+	cfg, err := config.NewConfig(cfgFile)
+	if err != nil {
+		log.Crit("failed to load config file", "config file", cfgFile, "error", err)
+	}
+	subCtx, cancel := context.WithCancel(ctx.Context)
+
+	// Init db connection
+	var ormFactory database.OrmFactory
+	if ormFactory, err = database.NewOrmFactory(cfg.DBConfig); err != nil {
+		log.Crit("failed to init db connection", "err", err)
+	}
+
+	defer func() {
+		cancel()
+		err = ormFactory.Close()
+		if err != nil {
+			log.Error("can not close ormFactory", "error", err)
+		}
+	}()
+
+	// Start metrics server.
+	metrics.Serve(subCtx, ctx)
+
+	// Init l2geth connection
+	l2client, err := ethclient.Dial(cfg.L2Config.Endpoint)
+	if err != nil {
+		log.Error("failed to connect l2 geth", "config file", cfgFile, "error", err)
+		return err
+	}
+
+	l1relayer, err := relayer.NewLayer1Relayer(ctx.Context, ormFactory, cfg.L1Config.RelayerConfig)
+	if err != nil {
+		log.Error("failed to create new l1 relayer", "config file", cfgFile, "error", err)
+		return err
+	}
+	l2relayer, err := relayer.NewLayer2Relayer(ctx.Context, l2client, ormFactory, cfg.L2Config.RelayerConfig)
+	if err != nil {
+		log.Error("failed to create new l2 relayer", "config file", cfgFile, "error", err)
+		return err
+	}
+
+	// Start l1relayer process
+	go cutils.Loop(subCtx, 10*time.Second, l1relayer.ProcessSavedEvents)
+
+	// Start l2relayer process
+	go cutils.Loop(subCtx, 2*time.Second, l2relayer.ProcessSavedEvents)
+
+	// Finish start all message relayer functions
+	log.Info("Start message-relayer successfully")
+
+	// Catch CTRL-C to ensure a graceful shutdown.
+	interrupt := make(chan os.Signal, 1)
+	signal.Notify(interrupt, os.Interrupt)
+
+	// Wait until the interrupt signal is received from an OS signal.
+	<-interrupt
+
+	return nil
+}
+
+// Run message_relayer cmd instance.
+func Run() {
+	if err := app.Run(os.Args); err != nil {
+		_, _ = fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}

bridge/cmd/msg_relayer/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "scroll-tech/bridge/cmd/msg_relayer/app"
+
+func main() {
+	app.Run()
+}

bridge/cmd/rollup_relayer/app/app.go

@@ -0,0 +1,133 @@
+package app
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"time"
+
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/scroll-tech/go-ethereum/log"
+	"github.com/urfave/cli/v2"
+
+	"scroll-tech/database"
+
+	"scroll-tech/common/metrics"
+	"scroll-tech/common/version"
+
+	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/relayer"
+	"scroll-tech/bridge/utils"
+	"scroll-tech/bridge/watcher"
+
+	cutils "scroll-tech/common/utils"
+)
+
+var (
+	app *cli.App
+)
+
+func init() {
+	// Set up rollup-relayer app info.
+	app = cli.NewApp()
+
+	app.Action = action
+	app.Name = "rollup-relayer"
+	app.Usage = "The Scroll Rollup Relayer"
+	app.Version = version.Version
+	app.Flags = append(app.Flags, cutils.CommonFlags...)
+	app.Commands = []*cli.Command{}
+
+	app.Before = func(ctx *cli.Context) error {
+		return cutils.LogSetup(ctx)
+	}
+	// Register `rollup-relayer-test` app for integration-test.
+	cutils.RegisterSimulation(app, cutils.RollupRelayerApp)
+}
+
+func action(ctx *cli.Context) error {
+	// Load config file.
+	cfgFile := ctx.String(cutils.ConfigFileFlag.Name)
+	cfg, err := config.NewConfig(cfgFile)
+	if err != nil {
+		log.Crit("failed to load config file", "config file", cfgFile, "error", err)
+	}
+
+	subCtx, cancel := context.WithCancel(ctx.Context)
+
+	// init db connection
+	var ormFactory database.OrmFactory
+	if ormFactory, err = database.NewOrmFactory(cfg.DBConfig); err != nil {
+		log.Crit("failed to init db connection", "err", err)
+	}
+	defer func() {
+		cancel()
+		err = ormFactory.Close()
+		if err != nil {
+			log.Error("can not close ormFactory", "error", err)
+		}
+	}()
+
+	// Start metrics server.
+	metrics.Serve(subCtx, ctx)
+
+	// Init l2geth connection
+	l2client, err := ethclient.Dial(cfg.L2Config.Endpoint)
+	if err != nil {
+		log.Error("failed to connect l2 geth", "config file", cfgFile, "error", err)
+		return err
+	}
+
+	l2relayer, err := relayer.NewLayer2Relayer(ctx.Context, l2client, ormFactory, cfg.L2Config.RelayerConfig)
+	if err != nil {
+		log.Error("failed to create l2 relayer", "config file", cfgFile, "error", err)
+		return err
+	}
+
+	batchProposer := watcher.NewBatchProposer(subCtx, cfg.L2Config.BatchProposerConfig, l2relayer, ormFactory)
+	if err != nil {
+		log.Error("failed to create batchProposer", "config file", cfgFile, "error", err)
+		return err
+	}
+
+	l2watcher := watcher.NewL2WatcherClient(subCtx, l2client, cfg.L2Config.Confirmations, cfg.L2Config.L2MessengerAddress, cfg.L2Config.L2MessageQueueAddress, cfg.L2Config.WithdrawTrieRootSlot, ormFactory)
+
+	// Watcher loop to fetch missing blocks
+	go cutils.LoopWithContext(subCtx, 2*time.Second, func(ctx context.Context) {
+		number, loopErr := utils.GetLatestConfirmedBlockNumber(ctx, l2client, cfg.L2Config.Confirmations)
+		if loopErr != nil {
+			log.Error("failed to get block number", "err", loopErr)
+			return
+		}
+		l2watcher.TryFetchRunningMissingBlocks(ctx, number)
+	})
+
+	// Batch proposer loop
+	go cutils.Loop(subCtx, 2*time.Second, func() {
+		batchProposer.TryProposeBatch()
+		batchProposer.TryCommitBatches()
+	})
+
+	go cutils.Loop(subCtx, 2*time.Second, l2relayer.ProcessCommittedBatches)
+
+	// Finish start all rollup relayer functions.
+	log.Info("Start rollup-relayer successfully")
+
+	// Catch CTRL-C to ensure a graceful shutdown.
+	interrupt := make(chan os.Signal, 1)
+	signal.Notify(interrupt, os.Interrupt)
+
+	// Wait until the interrupt signal is received from an OS signal.
+	<-interrupt
+
+	return nil
+}
+
+// Run rollup relayer cmd instance.
+func Run() {
+	if err := app.Run(os.Args); err != nil {
+		_, _ = fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}

bridge/cmd/rollup_relayer/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "scroll-tech/bridge/cmd/rollup_relayer/app"
+
+func main() {
+	app.Run()
+}

bridge/config.json

@@ -3,23 +3,35 @@
     "confirmations": "0x6",
     "endpoint": "https://goerli.infura.io/v3/9aa3d95b3bc440fa88ea12eaa4456161",
     "l1_messenger_address": "0x0000000000000000000000000000000000000000",
-    "rollup_contract_address": "0x0000000000000000000000000000000000000000",
+    "l1_message_queue_address": "0x0000000000000000000000000000000000000000",
+    "scroll_chain_address": "0x0000000000000000000000000000000000000000",
     "start_height": 0,
     "relayer_config": {
       "messenger_contract_address": "0x0000000000000000000000000000000000000000",
+      "gas_price_oracle_address": "0x0000000000000000000000000000000000000000",
       "sender_config": {
         "endpoint": "/var/lib/jenkins/workspace/SequencerPipeline/MyPrivateNetwork/geth.ipc",
-        "check_pending_time": 3,
+        "check_pending_time": 2,
+        "check_balance_time": 100,
         "escalate_blocks": 100,
         "confirmations": "0x1",
         "escalate_multiple_num": 11,
         "escalate_multiple_den": 10,
         "max_gas_price": 10000000000,
         "tx_type": "LegacyTx",
-        "min_balance": 100000000000000000000
+        "min_balance": 100000000000000000000,
+        "pending_limit": 10
       },
+      "gas_oracle_config": {
+        "min_gas_price": 0,
+        "gas_price_diff": 50000
+      },
+      "finalize_batch_interval_sec": 0,
       "message_sender_private_keys": [
         "1212121212121212121212121212121212121212121212121212121212121212"
+      ],
+      "gas_oracle_sender_private_keys": [
+        "1313131313131313131313131313131313131313131313131313131313131313"
       ]
     }
   },
@@ -27,41 +39,57 @@
     "confirmations": "0x1",
     "endpoint": "/var/lib/jenkins/workspace/SequencerPipeline/MyPrivateNetwork/geth.ipc",
     "l2_messenger_address": "0x0000000000000000000000000000000000000000",
+    "l2_message_queue_address": "0x0000000000000000000000000000000000000000",
     "relayer_config": {
       "rollup_contract_address": "0x0000000000000000000000000000000000000000",
       "messenger_contract_address": "0x0000000000000000000000000000000000000000",
+      "gas_price_oracle_address": "0x0000000000000000000000000000000000000000",
       "sender_config": {
         "endpoint": "https://goerli.infura.io/v3/9aa3d95b3bc440fa88ea12eaa4456161",
         "check_pending_time": 10,
+        "check_balance_time": 100,
         "escalate_blocks": 100,
         "confirmations": "0x6",
         "escalate_multiple_num": 11,
         "escalate_multiple_den": 10,
         "max_gas_price": 10000000000,
         "tx_type": "LegacyTx",
-        "min_balance": 100000000000000000000
+        "min_balance": 100000000000000000000,
+        "pending_limit": 10
       },
+      "gas_oracle_config": {
+        "min_gas_price": 0,
+        "gas_price_diff": 50000
+      },
+      "finalize_batch_interval_sec": 0,
       "message_sender_private_keys": [
         "1212121212121212121212121212121212121212121212121212121212121212"
       ],
+      "gas_oracle_sender_private_keys": [
+        "1313131313131313131313131313131313131313131313131313131313131313"
+      ],
       "rollup_sender_private_keys": [
-        "1212121212121212121212121212121212121212121212121212121212121212"
+        "1414141414141414141414141414141414141414141414141414141414141414"
       ]
     },
     "batch_proposer_config": {
       "proof_generation_freq": 1,
       "batch_gas_threshold": 3000000,
-      "batch_tx_num_threshold": 135,
+      "batch_tx_num_threshold": 44,
       "batch_time_sec": 300,
+      "batch_commit_time_sec": 1200,
       "batch_blocks_limit": 100,
-      "skipped_opcodes": [
-        "CREATE2",
-        "DELEGATECALL"
-      ]
+      "commit_tx_calldata_size_limit": 200000,
+      "public_input_config": {
+        "max_tx_num": 44,
+        "padding_tx_hash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+      }
     }
   },
   "db_config": {
     "driver_name": "postgres",
-    "dsn": "postgres://admin:123456@localhost/test?sslmode=disable"
+    "dsn": "postgres://admin:123456@localhost/test?sslmode=disable",
+    "maxOpenNum": 200,
+    "maxIdleNum": 20
   }
-}
+}

bridge/config/config_test.go

@@ -16,11 +16,9 @@ func TestConfig(t *testing.T) {
 	cfg, err := config.NewConfig("../config.json")
 	assert.True(t, assert.NoError(t, err), "failed to load config")
 
-	assert.True(t, len(cfg.L2Config.BatchProposerConfig.SkippedOpcodes) > 0)
-
-	assert.True(t, len(cfg.L1Config.RelayerConfig.MessageSenderPrivateKeys) > 0)
-	assert.True(t, len(cfg.L2Config.RelayerConfig.MessageSenderPrivateKeys) > 0)
-	assert.True(t, len(cfg.L2Config.RelayerConfig.RollupSenderPrivateKeys) > 0)
+	assert.Equal(t, 1, len(cfg.L1Config.RelayerConfig.MessageSenderPrivateKeys))
+	assert.Equal(t, 1, len(cfg.L2Config.RelayerConfig.MessageSenderPrivateKeys))
+	assert.Equal(t, 1, len(cfg.L2Config.RelayerConfig.RollupSenderPrivateKeys))
 
 	data, err := json.Marshal(cfg)
 	assert.NoError(t, err)

bridge/config/l1_config.go

@@ -13,10 +13,12 @@ type L1Config struct {
 	Endpoint string `json:"endpoint"`
 	// The start height to sync event from layer 1
 	StartHeight uint64 `json:"start_height"`
-	// The messenger contract address deployed on layer 1 chain.
+	// The L1ScrollMessenger contract address deployed on layer 1 chain.
 	L1MessengerAddress common.Address `json:"l1_messenger_address"`
-	// The rollup contract address deployed on layer 1 chain.
-	RollupContractAddress common.Address `json:"rollup_contract_address"`
+	// The L1MessageQueue contract address deployed on layer 1 chain.
+	L1MessageQueueAddress common.Address `json:"l1_message_queue_address"`
+	// The ScrollChain contract address deployed on layer 1 chain.
+	ScrollChainContractAddress common.Address `json:"scroll_chain_address"`
 	// The relayer config
 	RelayerConfig *RelayerConfig `json:"relayer_config"`
 }

bridge/config/l2_config.go

@@ -1,11 +1,11 @@
 package config
 
 import (
-	"encoding/json"
-
 	"github.com/scroll-tech/go-ethereum/rpc"
 
 	"github.com/scroll-tech/go-ethereum/common"
+
+	"scroll-tech/common/types"
 )
 
 // L2Config loads l2geth configuration items.
@@ -15,7 +15,11 @@ type L2Config struct {
 	// l2geth node url.
 	Endpoint string `json:"endpoint"`
 	// The messenger contract address deployed on layer 2 chain.
-	L2MessengerAddress common.Address `json:"l2_messenger_address,omitempty"`
+	L2MessengerAddress common.Address `json:"l2_messenger_address"`
+	// The L2MessageQueue contract address deployed on layer 2 chain.
+	L2MessageQueueAddress common.Address `json:"l2_message_queue_address"`
+	// The WithdrawTrieRootSlot in L2MessageQueue contract.
+	WithdrawTrieRootSlot common.Hash `json:"withdraw_trie_root_slot,omitempty"`
 	// The relayer config
 	RelayerConfig *RelayerConfig `json:"relayer_config"`
 	// The batch_proposer config
@@ -32,44 +36,14 @@ type BatchProposerConfig struct {
 	BatchGasThreshold uint64 `json:"batch_gas_threshold"`
 	// Time waited to generate a batch even if gas_threshold not met
 	BatchTimeSec uint64 `json:"batch_time_sec"`
+	// Time waited to commit batches before the calldata met CommitTxCalldataSizeLimit
+	BatchCommitTimeSec uint64 `json:"batch_commit_time_sec"`
 	// Max number of blocks in a batch
 	BatchBlocksLimit uint64 `json:"batch_blocks_limit"`
-	// Skip generating proof when that opcodes appeared
-	SkippedOpcodes map[string]struct{} `json:"-"`
-}
-
-// batchProposerConfigAlias RelayerConfig alias name
-type batchProposerConfigAlias BatchProposerConfig
-
-// UnmarshalJSON unmarshal BatchProposerConfig config struct.
-func (b *BatchProposerConfig) UnmarshalJSON(input []byte) error {
-	var jsonConfig struct {
-		batchProposerConfigAlias
-		SkippedOpcodes []string `json:"skipped_opcodes,omitempty"`
-	}
-	if err := json.Unmarshal(input, &jsonConfig); err != nil {
-		return err
-	}
-
-	*b = BatchProposerConfig(jsonConfig.batchProposerConfigAlias)
-	b.SkippedOpcodes = make(map[string]struct{}, len(jsonConfig.SkippedOpcodes))
-	for _, opcode := range jsonConfig.SkippedOpcodes {
-		b.SkippedOpcodes[opcode] = struct{}{}
-	}
-	return nil
-}
-
-// MarshalJSON marshal BatchProposerConfig in order to transfer skipOpcodes.
-func (b *BatchProposerConfig) MarshalJSON() ([]byte, error) {
-	jsonConfig := struct {
-		batchProposerConfigAlias
-		SkippedOpcodes []string `json:"skipped_opcodes,omitempty"`
-	}{batchProposerConfigAlias(*b), nil}
-
-	// Load skipOpcodes.
-	for op := range b.SkippedOpcodes {
-		jsonConfig.SkippedOpcodes = append(jsonConfig.SkippedOpcodes, op)
-	}
-
-	return json.Marshal(&jsonConfig)
+	// Commit tx calldata size limit in bytes, target to cap the gas use of commit tx at 2M gas
+	CommitTxCalldataSizeLimit uint64 `json:"commit_tx_calldata_size_limit"`
+	// Commit tx calldata min size limit in bytes
+	CommitTxCalldataMinSize uint64 `json:"commit_tx_calldata_min_size,omitempty"`
+	// The public input hash config
+	PublicInputConfig *types.PublicInputHashConfig `json:"public_input_config"`
 }

bridge/config/relayer_config.go

@@ -31,6 +31,10 @@ type SenderConfig struct {
 	TxType string `json:"tx_type"`
 	// The min balance set for check and set balance for sender's accounts.
 	MinBalance *big.Int `json:"min_balance,omitempty"`
+	// The interval (in seconds) to check balance and top up sender's accounts
+	CheckBalanceTime uint64 `json:"check_balance_time"`
+	// The sender's pending count limit.
+	PendingLimit int `json:"pending_limit,omitempty"`
 }
 
 // RelayerConfig loads relayer configuration items.
@@ -41,11 +45,28 @@ type RelayerConfig struct {
 	RollupContractAddress common.Address `json:"rollup_contract_address,omitempty"`
 	// MessengerContractAddress store the scroll messenger contract address.
 	MessengerContractAddress common.Address `json:"messenger_contract_address"`
+	// GasPriceOracleContractAddress store the scroll messenger contract address.
+	GasPriceOracleContractAddress common.Address `json:"gas_price_oracle_contract_address"`
 	// sender config
 	SenderConfig *SenderConfig `json:"sender_config"`
+	// gas oracle config
+	GasOracleConfig *GasOracleConfig `json:"gas_oracle_config"`
+	// The interval in which we send finalize batch transactions.
+	FinalizeBatchIntervalSec uint64 `json:"finalize_batch_interval_sec"`
+	// MessageRelayMinGasLimit to avoid OutOfGas error
+	MessageRelayMinGasLimit uint64 `json:"message_relay_min_gas_limit,omitempty"`
 	// The private key of the relayer
-	MessageSenderPrivateKeys []*ecdsa.PrivateKey `json:"-"`
-	RollupSenderPrivateKeys  []*ecdsa.PrivateKey `json:"-"`
+	MessageSenderPrivateKeys   []*ecdsa.PrivateKey `json:"-"`
+	GasOracleSenderPrivateKeys []*ecdsa.PrivateKey `json:"-"`
+	RollupSenderPrivateKeys    []*ecdsa.PrivateKey `json:"-"`
+}
+
+// GasOracleConfig The config for updating gas price oracle.
+type GasOracleConfig struct {
+	// MinGasPrice store the minimum gas price to set.
+	MinGasPrice uint64 `json:"min_gas_price"`
+	// GasPriceDiff store the percentage of gas price difference.
+	GasPriceDiff uint64 `json:"gas_price_diff"`
 }
 
 // relayerConfigAlias RelayerConfig alias name
@@ -56,15 +77,17 @@ func (r *RelayerConfig) UnmarshalJSON(input []byte) error {
 	var jsonConfig struct {
 		relayerConfigAlias
 		// The private key of the relayer
-		MessageSenderPrivateKeys []string `json:"message_sender_private_keys"`
-		RollupSenderPrivateKeys  []string `json:"rollup_sender_private_keys,omitempty"`
+		MessageSenderPrivateKeys   []string `json:"message_sender_private_keys"`
+		GasOracleSenderPrivateKeys []string `json:"gas_oracle_sender_private_keys"`
+		RollupSenderPrivateKeys    []string `json:"rollup_sender_private_keys,omitempty"`
 	}
 	if err := json.Unmarshal(input, &jsonConfig); err != nil {
 		return err
 	}
 
-	// Get messenger private key list.
 	*r = RelayerConfig(jsonConfig.relayerConfigAlias)
+
+	// Get messenger private key list.
 	for _, privStr := range jsonConfig.MessageSenderPrivateKeys {
 		priv, err := crypto.ToECDSA(common.FromHex(privStr))
 		if err != nil {
@@ -73,6 +96,15 @@ func (r *RelayerConfig) UnmarshalJSON(input []byte) error {
 		r.MessageSenderPrivateKeys = append(r.MessageSenderPrivateKeys, priv)
 	}
 
+	// Get gas oracle private key list.
+	for _, privStr := range jsonConfig.GasOracleSenderPrivateKeys {
+		priv, err := crypto.ToECDSA(common.FromHex(privStr))
+		if err != nil {
+			return fmt.Errorf("incorrect private_key_list format, err: %v", err)
+		}
+		r.GasOracleSenderPrivateKeys = append(r.GasOracleSenderPrivateKeys, priv)
+	}
+
 	// Get rollup private key
 	for _, privStr := range jsonConfig.RollupSenderPrivateKeys {
 		priv, err := crypto.ToECDSA(common.FromHex(privStr))
@@ -90,15 +122,21 @@ func (r *RelayerConfig) MarshalJSON() ([]byte, error) {
 	jsonConfig := struct {
 		relayerConfigAlias
 		// The private key of the relayer
-		MessageSenderPrivateKeys []string `json:"message_sender_private_keys"`
-		RollupSenderPrivateKeys  []string `json:"rollup_sender_private_keys,omitempty"`
-	}{relayerConfigAlias(*r), nil, nil}
+		MessageSenderPrivateKeys   []string `json:"message_sender_private_keys"`
+		GasOracleSenderPrivateKeys []string `json:"gas_oracle_sender_private_keys,omitempty"`
+		RollupSenderPrivateKeys    []string `json:"rollup_sender_private_keys,omitempty"`
+	}{relayerConfigAlias(*r), nil, nil, nil}
 
 	// Transfer message sender private keys to hex type.
 	for _, priv := range r.MessageSenderPrivateKeys {
 		jsonConfig.MessageSenderPrivateKeys = append(jsonConfig.MessageSenderPrivateKeys, common.Bytes2Hex(crypto.FromECDSA(priv)))
 	}
 
+	// Transfer rollup sender private keys to hex type.
+	for _, priv := range r.GasOracleSenderPrivateKeys {
+		jsonConfig.GasOracleSenderPrivateKeys = append(jsonConfig.GasOracleSenderPrivateKeys, common.Bytes2Hex(crypto.FromECDSA(priv)))
+	}
+
 	// Transfer rollup sender private keys to hex type.
 	for _, priv := range r.RollupSenderPrivateKeys {
 		jsonConfig.RollupSenderPrivateKeys = append(jsonConfig.RollupSenderPrivateKeys, common.Bytes2Hex(crypto.FromECDSA(priv)))

bridge/go.mod

@@ -3,43 +3,40 @@ module scroll-tech/bridge
 go 1.18
 
 require (
-	github.com/iden3/go-iden3-crypto v0.0.13
 	github.com/orcaman/concurrent-map v1.0.0
-	github.com/scroll-tech/go-ethereum v1.10.14-0.20230210093343-bb26fa3e391d
-	github.com/stretchr/testify v1.8.0
-	github.com/urfave/cli/v2 v2.10.2
+	github.com/orcaman/concurrent-map/v2 v2.0.1
+	github.com/scroll-tech/go-ethereum v1.10.14-0.20230321020420-127af384ed04
+	github.com/stretchr/testify v1.8.2
+	github.com/urfave/cli/v2 v2.17.2-0.20221006022127-8f469abc00aa
 	golang.org/x/sync v0.1.0
 	modernc.org/mathutil v1.4.1
 )
 
 require (
 	github.com/btcsuite/btcd v0.20.1-beta // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/deckarep/golang-set v1.8.0 // indirect
-	github.com/ethereum/go-ethereum v1.10.26 // indirect
+	github.com/ethereum/go-ethereum v1.11.4 // indirect
 	github.com/go-ole/go-ole v1.2.6 // indirect
-	github.com/go-stack/stack v1.8.0 // indirect
+	github.com/go-stack/stack v1.8.1 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/gorilla/websocket v1.5.0 // indirect
-	github.com/holiman/uint256 v1.2.0 // indirect
-	github.com/kr/pretty v0.3.0 // indirect
-	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/iden3/go-iden3-crypto v0.0.14 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
 	github.com/rjeczalik/notify v0.9.1 // indirect
-	github.com/rogpeppe/go-internal v1.8.1 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/scroll-tech/zktrie v0.4.3 // indirect
+	github.com/scroll-tech/zktrie v0.5.2 // indirect
 	github.com/shirou/gopsutil v3.21.11+incompatible // indirect
 	github.com/tklauser/go-sysconf v0.3.10 // indirect
 	github.com/tklauser/numcpus v0.4.0 // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	github.com/yusufpapurcu/wmi v1.2.2 // indirect
-	golang.org/x/crypto v0.6.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/crypto v0.7.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

bridge/go.sum

@@ -1,63 +1,5 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
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bridge/l1/backend.go

@@ -1,55 +0,0 @@
-package l1
-
-import (
-	"context"
-
-	"github.com/scroll-tech/go-ethereum/ethclient"
-
-	"scroll-tech/database"
-
-	"scroll-tech/bridge/config"
-)
-
-// Backend manage the resources and services of L1 backend.
-// The backend should monitor events in layer 1 and relay transactions to layer 2
-type Backend struct {
-	cfg     *config.L1Config
-	watcher *Watcher
-	relayer *Layer1Relayer
-	orm     database.OrmFactory
-}
-
-// New returns a new instance of Backend.
-func New(ctx context.Context, cfg *config.L1Config, orm database.OrmFactory) (*Backend, error) {
-	client, err := ethclient.Dial(cfg.Endpoint)
-	if err != nil {
-		return nil, err
-	}
-
-	relayer, err := NewLayer1Relayer(ctx, orm, cfg.RelayerConfig)
-	if err != nil {
-		return nil, err
-	}
-
-	watcher := NewWatcher(ctx, client, cfg.StartHeight, cfg.Confirmations, cfg.L1MessengerAddress, cfg.RollupContractAddress, orm)
-
-	return &Backend{
-		cfg:     cfg,
-		watcher: watcher,
-		relayer: relayer,
-		orm:     orm,
-	}, nil
-}
-
-// Start Backend module.
-func (l1 *Backend) Start() error {
-	l1.watcher.Start()
-	l1.relayer.Start()
-	return nil
-}
-
-// Stop Backend module.
-func (l1 *Backend) Stop() {
-	l1.watcher.Stop()
-	l1.relayer.Stop()
-}

bridge/l1/l1_test.go

@@ -1,65 +0,0 @@
-package l1
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-
-	"scroll-tech/common/docker"
-
-	"scroll-tech/bridge/config"
-)
-
-var (
-	// config
-	cfg *config.Config
-
-	// docker consider handler.
-	l1gethImg docker.ImgInstance
-	l2gethImg docker.ImgInstance
-	dbImg     docker.ImgInstance
-)
-
-func setupEnv(t *testing.T) {
-	// Load config.
-	var err error
-	cfg, err = config.NewConfig("../config.json")
-	assert.NoError(t, err)
-
-	// Create l1geth container.
-	l1gethImg = docker.NewTestL1Docker(t)
-	cfg.L2Config.RelayerConfig.SenderConfig.Endpoint = l1gethImg.Endpoint()
-	cfg.L1Config.Endpoint = l1gethImg.Endpoint()
-
-	// Create l2geth container.
-	l2gethImg = docker.NewTestL2Docker(t)
-	cfg.L1Config.RelayerConfig.SenderConfig.Endpoint = l2gethImg.Endpoint()
-	cfg.L2Config.Endpoint = l2gethImg.Endpoint()
-
-	// Create db container.
-	dbImg = docker.NewTestDBDocker(t, cfg.DBConfig.DriverName)
-	cfg.DBConfig.DSN = dbImg.Endpoint()
-}
-
-func free(t *testing.T) {
-	if dbImg != nil {
-		assert.NoError(t, dbImg.Stop())
-	}
-	if l1gethImg != nil {
-		assert.NoError(t, l1gethImg.Stop())
-	}
-	if l2gethImg != nil {
-		assert.NoError(t, l2gethImg.Stop())
-	}
-}
-
-func TestL1(t *testing.T) {
-	setupEnv(t)
-
-	t.Run("testCreateNewL1Relayer", testCreateNewL1Relayer)
-	t.Run("testStartWatcher", testStartWatcher)
-
-	t.Cleanup(func() {
-		free(t)
-	})
-}

bridge/l1/relayer.go

@@ -1,166 +0,0 @@
-package l1
-
-import (
-	"context"
-	"errors"
-	"math/big"
-	"time"
-
-	// not sure if this will make problems when relay with l1geth
-
-	"github.com/scroll-tech/go-ethereum/accounts/abi"
-	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/crypto"
-	"github.com/scroll-tech/go-ethereum/log"
-
-	"scroll-tech/database/orm"
-
-	bridge_abi "scroll-tech/bridge/abi"
-	"scroll-tech/bridge/config"
-	"scroll-tech/bridge/sender"
-)
-
-// Layer1Relayer is responsible for
-//  1. fetch pending L1Message from db
-//  2. relay pending message to layer 2 node
-//
-// Actions are triggered by new head from layer 1 geth node.
-// @todo It's better to be triggered by watcher.
-type Layer1Relayer struct {
-	ctx    context.Context
-	sender *sender.Sender
-
-	db  orm.L1MessageOrm
-	cfg *config.RelayerConfig
-
-	// channel used to communicate with transaction sender
-	confirmationCh <-chan *sender.Confirmation
-	l2MessengerABI *abi.ABI
-
-	stopCh chan struct{}
-}
-
-// NewLayer1Relayer will return a new instance of Layer1RelayerClient
-func NewLayer1Relayer(ctx context.Context, db orm.L1MessageOrm, cfg *config.RelayerConfig) (*Layer1Relayer, error) {
-	l2MessengerABI, err := bridge_abi.L2MessengerMetaData.GetAbi()
-	if err != nil {
-		log.Warn("new L2MessengerABI failed", "err", err)
-		return nil, err
-	}
-
-	sender, err := sender.NewSender(ctx, cfg.SenderConfig, cfg.MessageSenderPrivateKeys)
-	if err != nil {
-		addr := crypto.PubkeyToAddress(cfg.MessageSenderPrivateKeys[0].PublicKey)
-		log.Error("new sender failed", "main address", addr.String(), "err", err)
-		return nil, err
-	}
-
-	return &Layer1Relayer{
-		ctx:            ctx,
-		sender:         sender,
-		db:             db,
-		l2MessengerABI: l2MessengerABI,
-		cfg:            cfg,
-		stopCh:         make(chan struct{}),
-		confirmationCh: sender.ConfirmChan(),
-	}, nil
-}
-
-// ProcessSavedEvents relays saved un-processed cross-domain transactions to desired blockchain
-func (r *Layer1Relayer) ProcessSavedEvents() {
-	// msgs are sorted by nonce in increasing order
-	msgs, err := r.db.GetL1MessagesByStatus(orm.MsgPending, 100)
-	if err != nil {
-		log.Error("Failed to fetch unprocessed L1 messages", "err", err)
-		return
-	}
-
-	if len(msgs) > 0 {
-		log.Info("Processing L1 messages", "count", len(msgs))
-	}
-
-	for _, msg := range msgs {
-		if err = r.processSavedEvent(msg); err != nil {
-			if !errors.Is(err, sender.ErrNoAvailableAccount) {
-				log.Error("failed to process event", "msg.msgHash", msg.MsgHash, "err", err)
-			}
-			return
-		}
-	}
-}
-
-func (r *Layer1Relayer) processSavedEvent(msg *orm.L1Message) error {
-	// @todo add support to relay multiple messages
-	from := common.HexToAddress(msg.Sender)
-	target := common.HexToAddress(msg.Target)
-	value, ok := big.NewInt(0).SetString(msg.Value, 10)
-	if !ok {
-		// @todo maybe panic?
-		log.Error("Failed to parse message value", "msg.nonce", msg.Nonce, "msg.height", msg.Height)
-		// TODO: need to skip this message by changing its status to MsgError
-	}
-	fee, _ := big.NewInt(0).SetString(msg.Fee, 10)
-	deadline := big.NewInt(int64(msg.Deadline))
-	msgNonce := big.NewInt(int64(msg.Nonce))
-	calldata := common.Hex2Bytes(msg.Calldata)
-	data, err := r.l2MessengerABI.Pack("relayMessage", from, target, value, fee, deadline, msgNonce, calldata)
-	if err != nil {
-		log.Error("Failed to pack relayMessage", "msg.nonce", msg.Nonce, "msg.height", msg.Height, "err", err)
-		// TODO: need to skip this message by changing its status to MsgError
-		return err
-	}
-
-	hash, err := r.sender.SendTransaction(msg.MsgHash, &r.cfg.MessengerContractAddress, big.NewInt(0), data)
-	if err != nil && err.Error() == "execution reverted: Message expired" {
-		return r.db.UpdateLayer1Status(r.ctx, msg.MsgHash, orm.MsgExpired)
-	}
-	if err != nil && err.Error() == "execution reverted: Message successfully executed" {
-		return r.db.UpdateLayer1Status(r.ctx, msg.MsgHash, orm.MsgConfirmed)
-	}
-	if err != nil {
-		return err
-	}
-	log.Info("relayMessage to layer2", "msg hash", msg.MsgHash, "tx hash", hash)
-
-	err = r.db.UpdateLayer1StatusAndLayer2Hash(r.ctx, msg.MsgHash, orm.MsgSubmitted, hash.String())
-	if err != nil {
-		log.Error("UpdateLayer1StatusAndLayer2Hash failed", "msg.msgHash", msg.MsgHash, "msg.height", msg.Height, "err", err)
-	}
-	return err
-}
-
-// Start the relayer process
-func (r *Layer1Relayer) Start() {
-	go func() {
-		// trigger by timer
-		ticker := time.NewTicker(3 * time.Second)
-		defer ticker.Stop()
-
-		for {
-			select {
-			case <-ticker.C:
-				// number, err := r.client.BlockNumber(r.ctx)
-				// log.Info("receive header", "height", number)
-				r.ProcessSavedEvents()
-			case cfm := <-r.confirmationCh:
-				if !cfm.IsSuccessful {
-					log.Warn("transaction confirmed but failed in layer2", "confirmation", cfm)
-				} else {
-					// @todo handle db error
-					err := r.db.UpdateLayer1StatusAndLayer2Hash(r.ctx, cfm.ID, orm.MsgConfirmed, cfm.TxHash.String())
-					if err != nil {
-						log.Warn("UpdateLayer1StatusAndLayer2Hash failed", "err", err)
-					}
-					log.Info("transaction confirmed in layer2", "confirmation", cfm)
-				}
-			case <-r.stopCh:
-				return
-			}
-		}
-	}()
-}
-
-// Stop the relayer module, for a graceful shutdown.
-func (r *Layer1Relayer) Stop() {
-	close(r.stopCh)
-}

bridge/l1/watcher.go

@@ -1,341 +0,0 @@
-package l1
-
-import (
-	"context"
-	"math/big"
-	"time"
-
-	geth "github.com/scroll-tech/go-ethereum"
-	"github.com/scroll-tech/go-ethereum/accounts/abi"
-	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/core/types"
-	"github.com/scroll-tech/go-ethereum/ethclient"
-	"github.com/scroll-tech/go-ethereum/log"
-	"github.com/scroll-tech/go-ethereum/metrics"
-	"github.com/scroll-tech/go-ethereum/rpc"
-
-	"scroll-tech/database"
-	"scroll-tech/database/orm"
-
-	bridge_abi "scroll-tech/bridge/abi"
-	"scroll-tech/bridge/utils"
-)
-
-var (
-	bridgeL1MsgSyncHeightGauge = metrics.NewRegisteredGauge("bridge/l1/msg/sync/height", nil)
-)
-
-type relayedMessage struct {
-	msgHash      common.Hash
-	txHash       common.Hash
-	isSuccessful bool
-}
-
-type rollupEvent struct {
-	batchID common.Hash
-	txHash  common.Hash
-	status  orm.RollupStatus
-}
-
-// Watcher will listen for smart contract events from Eth L1.
-type Watcher struct {
-	ctx    context.Context
-	client *ethclient.Client
-	db     database.OrmFactory
-
-	// The number of new blocks to wait for a block to be confirmed
-	confirmations    rpc.BlockNumber
-	messengerAddress common.Address
-	messengerABI     *abi.ABI
-
-	rollupAddress common.Address
-	rollupABI     *abi.ABI
-
-	// The height of the block that the watcher has retrieved event logs
-	processedMsgHeight uint64
-
-	stop chan bool
-}
-
-// NewWatcher returns a new instance of Watcher. The instance will be not fully prepared,
-// and still needs to be finalized and ran by calling `watcher.Start`.
-func NewWatcher(ctx context.Context, client *ethclient.Client, startHeight uint64, confirmations rpc.BlockNumber, messengerAddress common.Address, rollupAddress common.Address, db database.OrmFactory) *Watcher {
-	savedHeight, err := db.GetLayer1LatestWatchedHeight()
-	if err != nil {
-		log.Warn("Failed to fetch height from db", "err", err)
-		savedHeight = 0
-	}
-	if savedHeight < int64(startHeight) {
-		savedHeight = int64(startHeight)
-	}
-
-	stop := make(chan bool)
-
-	return &Watcher{
-		ctx:                ctx,
-		client:             client,
-		db:                 db,
-		confirmations:      confirmations,
-		messengerAddress:   messengerAddress,
-		messengerABI:       bridge_abi.L1MessengerMetaABI,
-		rollupAddress:      rollupAddress,
-		rollupABI:          bridge_abi.RollupMetaABI,
-		processedMsgHeight: uint64(savedHeight),
-		stop:               stop,
-	}
-}
-
-// Start the Watcher module.
-func (w *Watcher) Start() {
-	go func() {
-		ticker := time.NewTicker(10 * time.Second)
-		defer ticker.Stop()
-
-		for ; true; <-ticker.C {
-			select {
-			case <-w.stop:
-				return
-
-			default:
-				number, err := utils.GetLatestConfirmedBlockNumber(w.ctx, w.client, w.confirmations)
-				if err != nil {
-					log.Error("failed to get block number", "err", err)
-					continue
-				}
-
-				if err := w.FetchContractEvent(number); err != nil {
-					log.Error("Failed to fetch bridge contract", "err", err)
-				}
-			}
-		}
-	}()
-}
-
-// Stop the Watcher module, for a graceful shutdown.
-func (w *Watcher) Stop() {
-	w.stop <- true
-}
-
-const contractEventsBlocksFetchLimit = int64(10)
-
-// FetchContractEvent pull latest event logs from given contract address and save in DB
-func (w *Watcher) FetchContractEvent(blockHeight uint64) error {
-	defer func() {
-		log.Info("l1 watcher fetchContractEvent", "w.processedMsgHeight", w.processedMsgHeight)
-	}()
-
-	fromBlock := int64(w.processedMsgHeight) + 1
-	toBlock := int64(blockHeight)
-
-	for from := fromBlock; from <= toBlock; from += contractEventsBlocksFetchLimit {
-		to := from + contractEventsBlocksFetchLimit - 1
-
-		if to > toBlock {
-			to = toBlock
-		}
-
-		// warning: uint int conversion...
-		query := geth.FilterQuery{
-			FromBlock: big.NewInt(from), // inclusive
-			ToBlock:   big.NewInt(to),   // inclusive
-			Addresses: []common.Address{
-				w.messengerAddress,
-				w.rollupAddress,
-			},
-			Topics: make([][]common.Hash, 1),
-		}
-		query.Topics[0] = make([]common.Hash, 5)
-		query.Topics[0][0] = common.HexToHash(bridge_abi.SentMessageEventSignature)
-		query.Topics[0][1] = common.HexToHash(bridge_abi.RelayedMessageEventSignature)
-		query.Topics[0][2] = common.HexToHash(bridge_abi.FailedRelayedMessageEventSignature)
-		query.Topics[0][3] = common.HexToHash(bridge_abi.CommitBatchEventSignature)
-		query.Topics[0][4] = common.HexToHash(bridge_abi.FinalizedBatchEventSignature)
-
-		logs, err := w.client.FilterLogs(w.ctx, query)
-		if err != nil {
-			log.Warn("Failed to get event logs", "err", err)
-			return err
-		}
-		if len(logs) == 0 {
-			w.processedMsgHeight = uint64(to)
-			bridgeL1MsgSyncHeightGauge.Update(to)
-			continue
-		}
-		log.Info("Received new L1 events", "fromBlock", from, "toBlock", to, "cnt", len(logs))
-
-		sentMessageEvents, relayedMessageEvents, rollupEvents, err := w.parseBridgeEventLogs(logs)
-		if err != nil {
-			log.Error("Failed to parse emitted events log", "err", err)
-			return err
-		}
-		log.Info("L1 events types", "SentMessageCount", len(sentMessageEvents), "RelayedMessageCount", len(relayedMessageEvents), "RollupEventCount", len(rollupEvents))
-
-		// use rollup event to update rollup results db status
-		var batchIDs []string
-		for _, event := range rollupEvents {
-			batchIDs = append(batchIDs, event.batchID.String())
-		}
-		statuses, err := w.db.GetRollupStatusByIDList(batchIDs)
-		if err != nil {
-			log.Error("Failed to GetRollupStatusByIDList", "err", err)
-			return err
-		}
-		if len(statuses) != len(batchIDs) {
-			log.Error("RollupStatus.Length mismatch with BatchIDs.Length", "RollupStatus.Length", len(statuses), "BatchIDs.Length", len(batchIDs))
-			return nil
-		}
-
-		for index, event := range rollupEvents {
-			batchID := event.batchID.String()
-			status := statuses[index]
-			// only update when db status is before event status
-			if event.status > status {
-				if event.status == orm.RollupFinalized {
-					err = w.db.UpdateFinalizeTxHashAndRollupStatus(w.ctx, batchID, event.txHash.String(), event.status)
-				} else if event.status == orm.RollupCommitted {
-					err = w.db.UpdateCommitTxHashAndRollupStatus(w.ctx, batchID, event.txHash.String(), event.status)
-				}
-				if err != nil {
-					log.Error("Failed to update Rollup/Finalize TxHash and Status", "err", err)
-					return err
-				}
-			}
-		}
-
-		// Update relayed message first to make sure we don't forget to update submitted message.
-		// Since, we always start sync from the latest unprocessed message.
-		for _, msg := range relayedMessageEvents {
-			if msg.isSuccessful {
-				// succeed
-				err = w.db.UpdateLayer2StatusAndLayer1Hash(w.ctx, msg.msgHash.String(), orm.MsgConfirmed, msg.txHash.String())
-			} else {
-				// failed
-				err = w.db.UpdateLayer2StatusAndLayer1Hash(w.ctx, msg.msgHash.String(), orm.MsgFailed, msg.txHash.String())
-			}
-			if err != nil {
-				log.Error("Failed to update layer1 status and layer2 hash", "err", err)
-				return err
-			}
-		}
-
-		if err = w.db.SaveL1Messages(w.ctx, sentMessageEvents); err != nil {
-			return err
-		}
-
-		w.processedMsgHeight = uint64(to)
-		bridgeL1MsgSyncHeightGauge.Update(to)
-	}
-
-	return nil
-}
-
-func (w *Watcher) parseBridgeEventLogs(logs []types.Log) ([]*orm.L1Message, []relayedMessage, []rollupEvent, error) {
-	// Need use contract abi to parse event Log
-	// Can only be tested after we have our contracts set up
-
-	var l1Messages []*orm.L1Message
-	var relayedMessages []relayedMessage
-	var rollupEvents []rollupEvent
-	for _, vLog := range logs {
-		switch vLog.Topics[0] {
-		case common.HexToHash(bridge_abi.SentMessageEventSignature):
-			event := struct {
-				Target       common.Address
-				Sender       common.Address
-				Value        *big.Int // uint256
-				Fee          *big.Int // uint256
-				Deadline     *big.Int // uint256
-				Message      []byte
-				MessageNonce *big.Int // uint256
-				GasLimit     *big.Int // uint256
-			}{}
-
-			err := w.messengerABI.UnpackIntoInterface(&event, "SentMessage", vLog.Data)
-			if err != nil {
-				log.Warn("Failed to unpack layer1 SentMessage event", "err", err)
-				return l1Messages, relayedMessages, rollupEvents, err
-			}
-			// target is in topics[1]
-			event.Target = common.HexToAddress(vLog.Topics[1].String())
-			l1Messages = append(l1Messages, &orm.L1Message{
-				Nonce:      event.MessageNonce.Uint64(),
-				MsgHash:    utils.ComputeMessageHash(event.Sender, event.Target, event.Value, event.Fee, event.Deadline, event.Message, event.MessageNonce).String(),
-				Height:     vLog.BlockNumber,
-				Sender:     event.Sender.String(),
-				Value:      event.Value.String(),
-				Fee:        event.Fee.String(),
-				GasLimit:   event.GasLimit.Uint64(),
-				Deadline:   event.Deadline.Uint64(),
-				Target:     event.Target.String(),
-				Calldata:   common.Bytes2Hex(event.Message),
-				Layer1Hash: vLog.TxHash.Hex(),
-			})
-		case common.HexToHash(bridge_abi.RelayedMessageEventSignature):
-			event := struct {
-				MsgHash common.Hash
-			}{}
-			// MsgHash is in topics[1]
-			event.MsgHash = common.HexToHash(vLog.Topics[1].String())
-			relayedMessages = append(relayedMessages, relayedMessage{
-				msgHash:      event.MsgHash,
-				txHash:       vLog.TxHash,
-				isSuccessful: true,
-			})
-		case common.HexToHash(bridge_abi.FailedRelayedMessageEventSignature):
-			event := struct {
-				MsgHash common.Hash
-			}{}
-			// MsgHash is in topics[1]
-			event.MsgHash = common.HexToHash(vLog.Topics[1].String())
-			relayedMessages = append(relayedMessages, relayedMessage{
-				msgHash:      event.MsgHash,
-				txHash:       vLog.TxHash,
-				isSuccessful: false,
-			})
-		case common.HexToHash(bridge_abi.CommitBatchEventSignature):
-			event := struct {
-				BatchID    common.Hash
-				BatchHash  common.Hash
-				BatchIndex *big.Int
-				ParentHash common.Hash
-			}{}
-			// BatchID is in topics[1]
-			event.BatchID = common.HexToHash(vLog.Topics[1].String())
-			err := w.rollupABI.UnpackIntoInterface(&event, "CommitBatch", vLog.Data)
-			if err != nil {
-				log.Warn("Failed to unpack layer1 CommitBatch event", "err", err)
-				return l1Messages, relayedMessages, rollupEvents, err
-			}
-
-			rollupEvents = append(rollupEvents, rollupEvent{
-				batchID: event.BatchID,
-				txHash:  vLog.TxHash,
-				status:  orm.RollupCommitted,
-			})
-		case common.HexToHash(bridge_abi.FinalizedBatchEventSignature):
-			event := struct {
-				BatchID    common.Hash
-				BatchHash  common.Hash
-				BatchIndex *big.Int
-				ParentHash common.Hash
-			}{}
-			// BatchID is in topics[1]
-			event.BatchID = common.HexToHash(vLog.Topics[1].String())
-			err := w.rollupABI.UnpackIntoInterface(&event, "FinalizeBatch", vLog.Data)
-			if err != nil {
-				log.Warn("Failed to unpack layer1 FinalizeBatch event", "err", err)
-				return l1Messages, relayedMessages, rollupEvents, err
-			}
-
-			rollupEvents = append(rollupEvents, rollupEvent{
-				batchID: event.BatchID,
-				txHash:  vLog.TxHash,
-				status:  orm.RollupFinalized,
-			})
-		default:
-			log.Error("Unknown event", "topic", vLog.Topics[0], "txHash", vLog.TxHash)
-		}
-	}
-
-	return l1Messages, relayedMessages, rollupEvents, nil
-}

bridge/l2/backend.go

@@ -1,70 +0,0 @@
-package l2
-
-import (
-	"context"
-
-	"github.com/scroll-tech/go-ethereum/ethclient"
-	"github.com/scroll-tech/go-ethereum/rpc"
-
-	"scroll-tech/database"
-
-	"scroll-tech/bridge/config"
-)
-
-// Backend manage the resources and services of L2 backend.
-// The backend should monitor events in layer 2 and relay transactions to layer 1
-type Backend struct {
-	cfg       *config.L2Config
-	l2Watcher *WatcherClient
-	relayer   *Layer2Relayer
-	orm       database.OrmFactory
-}
-
-// New returns a new instance of Backend.
-func New(ctx context.Context, cfg *config.L2Config, orm database.OrmFactory) (*Backend, error) {
-	client, err := ethclient.Dial(cfg.Endpoint)
-	if err != nil {
-		return nil, err
-	}
-
-	// Note: initialize watcher before relayer to keep DB consistent.
-	// Otherwise, there will be a race condition between watcher.initializeGenesis and relayer.ProcessPendingBatches.
-	l2Watcher := NewL2WatcherClient(ctx, client, cfg.Confirmations, cfg.BatchProposerConfig, cfg.L2MessengerAddress, orm)
-
-	relayer, err := NewLayer2Relayer(ctx, orm, cfg.RelayerConfig)
-	if err != nil {
-		return nil, err
-	}
-
-	return &Backend{
-		cfg:       cfg,
-		l2Watcher: l2Watcher,
-		relayer:   relayer,
-		orm:       orm,
-	}, nil
-}
-
-// Start Backend module.
-func (l2 *Backend) Start() error {
-	l2.l2Watcher.Start()
-	l2.relayer.Start()
-	return nil
-}
-
-// Stop Backend module.
-func (l2 *Backend) Stop() {
-	l2.l2Watcher.Stop()
-	l2.relayer.Stop()
-}
-
-// APIs collect API modules.
-func (l2 *Backend) APIs() []rpc.API {
-	return []rpc.API{
-		{
-			Namespace: "l2",
-			Version:   "1.0",
-			Service:   WatcherAPI(l2.l2Watcher),
-			Public:    true,
-		},
-	}
-}

bridge/l2/batch_proposer.go

@@ -1,140 +0,0 @@
-package l2
-
-import (
-	"fmt"
-	"sync"
-	"time"
-
-	"github.com/scroll-tech/go-ethereum/log"
-
-	"scroll-tech/database"
-	"scroll-tech/database/orm"
-
-	"scroll-tech/bridge/config"
-)
-
-type batchProposer struct {
-	mutex sync.Mutex
-
-	orm database.OrmFactory
-
-	batchTimeSec        uint64
-	batchGasThreshold   uint64
-	batchTxNumThreshold uint64
-	batchBlocksLimit    uint64
-
-	proofGenerationFreq uint64
-	skippedOpcodes      map[string]struct{}
-}
-
-func newBatchProposer(cfg *config.BatchProposerConfig, orm database.OrmFactory) *batchProposer {
-	return &batchProposer{
-		mutex:               sync.Mutex{},
-		orm:                 orm,
-		batchTimeSec:        cfg.BatchTimeSec,
-		batchGasThreshold:   cfg.BatchGasThreshold,
-		batchTxNumThreshold: cfg.BatchTxNumThreshold,
-		batchBlocksLimit:    cfg.BatchBlocksLimit,
-		proofGenerationFreq: cfg.ProofGenerationFreq,
-		skippedOpcodes:      cfg.SkippedOpcodes,
-	}
-}
-
-func (w *batchProposer) tryProposeBatch() {
-	w.mutex.Lock()
-	defer w.mutex.Unlock()
-
-	blocks, err := w.orm.GetUnbatchedBlocks(
-		map[string]interface{}{},
-		fmt.Sprintf("order by number ASC LIMIT %d", w.batchBlocksLimit),
-	)
-	if err != nil {
-		log.Error("failed to get unbatched blocks", "err", err)
-		return
-	}
-	if len(blocks) == 0 {
-		return
-	}
-
-	if blocks[0].GasUsed > w.batchGasThreshold {
-		log.Warn("gas overflow even for only 1 block", "height", blocks[0].Number, "gas", blocks[0].GasUsed)
-		if _, err = w.createBatchForBlocks(blocks[:1]); err != nil {
-			log.Error("failed to create batch", "number", blocks[0].Number, "err", err)
-		}
-		return
-	}
-
-	if blocks[0].TxNum > w.batchTxNumThreshold {
-		log.Warn("too many txs even for only 1 block", "height", blocks[0].Number, "tx_num", blocks[0].TxNum)
-		if _, err = w.createBatchForBlocks(blocks[:1]); err != nil {
-			log.Error("failed to create batch", "number", blocks[0].Number, "err", err)
-		}
-		return
-	}
-
-	var (
-		length         = len(blocks)
-		gasUsed, txNum uint64
-	)
-	// add blocks into batch until reach batchGasThreshold
-	for i, block := range blocks {
-		if (gasUsed+block.GasUsed > w.batchGasThreshold) || (txNum+block.TxNum > w.batchTxNumThreshold) {
-			blocks = blocks[:i]
-			break
-		}
-		gasUsed += block.GasUsed
-		txNum += block.TxNum
-	}
-
-	// if too few gas gathered, but we don't want to halt, we then check the first block in the batch:
-	// if it's not old enough we will skip proposing the batch,
-	// otherwise we will still propose a batch
-	if length == len(blocks) && blocks[0].BlockTimestamp+w.batchTimeSec > uint64(time.Now().Unix()) {
-		return
-	}
-
-	if _, err = w.createBatchForBlocks(blocks); err != nil {
-		log.Error("failed to create batch", "from", blocks[0].Number, "to", blocks[len(blocks)-1].Number, "err", err)
-	}
-}
-
-func (w *batchProposer) createBatchForBlocks(blocks []*orm.BlockInfo) (string, error) {
-	dbTx, err := w.orm.Beginx()
-	if err != nil {
-		return "", err
-	}
-
-	var dbTxErr error
-	defer func() {
-		if dbTxErr != nil {
-			if err := dbTx.Rollback(); err != nil {
-				log.Error("dbTx.Rollback()", "err", err)
-			}
-		}
-	}()
-
-	var (
-		batchID        string
-		startBlock     = blocks[0]
-		endBlock       = blocks[len(blocks)-1]
-		txNum, gasUsed uint64
-		blockIDs       = make([]uint64, len(blocks))
-	)
-	for i, block := range blocks {
-		txNum += block.TxNum
-		gasUsed += block.GasUsed
-		blockIDs[i] = block.Number
-	}
-
-	batchID, dbTxErr = w.orm.NewBatchInDBTx(dbTx, startBlock, endBlock, startBlock.ParentHash, txNum, gasUsed)
-	if dbTxErr != nil {
-		return "", dbTxErr
-	}
-
-	if dbTxErr = w.orm.SetBatchIDForBlocksInDBTx(dbTx, blockIDs, batchID); dbTxErr != nil {
-		return "", dbTxErr
-	}
-
-	dbTxErr = dbTx.Commit()
-	return batchID, dbTxErr
-}

bridge/l2/batch_proposer_test.go

@@ -1,62 +0,0 @@
-package l2
-
-import (
-	"encoding/json"
-	"fmt"
-	"math/big"
-	"os"
-	"testing"
-
-	"github.com/scroll-tech/go-ethereum/core/types"
-	"github.com/stretchr/testify/assert"
-
-	"scroll-tech/database"
-	"scroll-tech/database/migrate"
-
-	"scroll-tech/bridge/config"
-
-	"scroll-tech/common/utils"
-)
-
-func testBatchProposer(t *testing.T) {
-	// Create db handler and reset db.
-	db, err := database.NewOrmFactory(cfg.DBConfig)
-	assert.NoError(t, err)
-	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
-	defer db.Close()
-
-	trace2 := &types.BlockTrace{}
-	trace3 := &types.BlockTrace{}
-
-	data, err := os.ReadFile("../../common/testdata/blockTrace_02.json")
-	assert.NoError(t, err)
-	err = json.Unmarshal(data, trace2)
-	assert.NoError(t, err)
-
-	data, err = os.ReadFile("../../common/testdata/blockTrace_03.json")
-	assert.NoError(t, err)
-	err = json.Unmarshal(data, trace3)
-	assert.NoError(t, err)
-	// Insert traces into db.
-	assert.NoError(t, db.InsertBlockTraces([]*types.BlockTrace{trace2, trace3}))
-
-	id := utils.ComputeBatchID(trace3.Header.Hash(), trace2.Header.ParentHash, big.NewInt(0))
-
-	proposer := newBatchProposer(&config.BatchProposerConfig{
-		ProofGenerationFreq: 1,
-		BatchGasThreshold:   3000000,
-		BatchTxNumThreshold: 135,
-		BatchTimeSec:        1,
-		BatchBlocksLimit:    100,
-	}, db)
-	proposer.tryProposeBatch()
-
-	infos, err := db.GetUnbatchedBlocks(map[string]interface{}{},
-		fmt.Sprintf("order by number ASC LIMIT %d", 100))
-	assert.NoError(t, err)
-	assert.Equal(t, true, len(infos) == 0)
-
-	exist, err := db.BatchRecordExist(id)
-	assert.NoError(t, err)
-	assert.Equal(t, true, exist)
-}

bridge/l2/check_trace.go

@@ -1,99 +0,0 @@
-package l2
-
-import (
-	"fmt"
-
-	"golang.org/x/sync/errgroup"
-
-	"github.com/scroll-tech/go-ethereum/core/types"
-	"github.com/scroll-tech/go-ethereum/core/vm"
-	"github.com/scroll-tech/go-ethereum/log"
-)
-
-//nolint:unused
-func blockTraceIsValid(trace *types.BlockTrace) bool {
-	if trace == nil {
-		log.Warn("block trace is empty")
-		return false
-	}
-	flag := true
-	for _, tx := range trace.ExecutionResults {
-		flag = structLogResIsValid(tx.StructLogs) && flag
-	}
-	return flag
-}
-
-//nolint:unused
-func structLogResIsValid(txLogs []*types.StructLogRes) bool {
-	res := true
-	for i := 0; i < len(txLogs); i++ {
-		txLog := txLogs[i]
-		flag := true
-		switch vm.StringToOp(txLog.Op) {
-		case vm.CALL, vm.CALLCODE:
-			flag = codeIsValid(txLog, 2) && flag
-			flag = stateIsValid(txLog, 2) && flag
-		case vm.DELEGATECALL, vm.STATICCALL:
-			flag = codeIsValid(txLog, 2) && flag
-		case vm.CREATE, vm.CREATE2:
-			flag = stateIsValid(txLog, 1) && flag
-		case vm.SLOAD, vm.SSTORE, vm.SELFBALANCE:
-			flag = stateIsValid(txLog, 1) && flag
-		case vm.SELFDESTRUCT:
-			flag = stateIsValid(txLog, 2) && flag
-		case vm.EXTCODEHASH, vm.BALANCE:
-			flag = stateIsValid(txLog, 1) && flag
-		}
-		res = res && flag
-	}
-
-	return res
-}
-
-//nolint:unused
-func codeIsValid(txLog *types.StructLogRes, n int) bool {
-	extraData := txLog.ExtraData
-	if extraData == nil {
-		log.Warn("extraData is empty", "pc", txLog.Pc, "opcode", txLog.Op)
-		return false
-	} else if len(extraData.CodeList) < n {
-		log.Warn("code list is too short", "opcode", txLog.Op, "expect length", n, "actual length", len(extraData.CodeList))
-		return false
-	}
-	return true
-}
-
-//nolint:unused
-func stateIsValid(txLog *types.StructLogRes, n int) bool {
-	extraData := txLog.ExtraData
-	if extraData == nil {
-		log.Warn("extraData is empty", "pc", txLog.Pc, "opcode", txLog.Op)
-		return false
-	} else if len(extraData.StateList) < n {
-		log.Warn("stateList list is too short", "opcode", txLog.Op, "expect length", n, "actual length", len(extraData.StateList))
-		return false
-	}
-	return true
-}
-
-// TraceHasUnsupportedOpcodes check if exist unsupported opcodes
-func TraceHasUnsupportedOpcodes(opcodes map[string]struct{}, trace *types.BlockTrace) bool {
-	if trace == nil {
-		return false
-	}
-	eg := errgroup.Group{}
-	for _, res := range trace.ExecutionResults {
-		res := res
-		eg.Go(func() error {
-			for _, lg := range res.StructLogs {
-				if _, ok := opcodes[lg.Op]; ok {
-					return fmt.Errorf("unsupported opcde: %s", lg.Op)
-				}
-			}
-			return nil
-		})
-	}
-
-	err := eg.Wait()
-	return err != nil
-}

bridge/l2/l2_test.go

@@ -1,87 +0,0 @@
-package l2
-
-import (
-	"testing"
-
-	"github.com/scroll-tech/go-ethereum/ethclient"
-	"github.com/stretchr/testify/assert"
-
-	"scroll-tech/common/docker"
-
-	"scroll-tech/bridge/config"
-)
-
-var (
-	// config
-	cfg *config.Config
-
-	// docker consider handler.
-	l1gethImg docker.ImgInstance
-	l2gethImg docker.ImgInstance
-	dbImg     docker.ImgInstance
-
-	// l2geth client
-	l2Cli *ethclient.Client
-)
-
-func setupEnv(t *testing.T) (err error) {
-	// Load config.
-	cfg, err = config.NewConfig("../config.json")
-	assert.NoError(t, err)
-
-	// Create l1geth container.
-	l1gethImg = docker.NewTestL1Docker(t)
-	cfg.L2Config.RelayerConfig.SenderConfig.Endpoint = l1gethImg.Endpoint()
-	cfg.L1Config.Endpoint = l1gethImg.Endpoint()
-
-	// Create l2geth container.
-	l2gethImg = docker.NewTestL2Docker(t)
-	cfg.L1Config.RelayerConfig.SenderConfig.Endpoint = l2gethImg.Endpoint()
-	cfg.L2Config.Endpoint = l2gethImg.Endpoint()
-
-	// Create db container.
-	dbImg = docker.NewTestDBDocker(t, cfg.DBConfig.DriverName)
-	cfg.DBConfig.DSN = dbImg.Endpoint()
-
-	// Create l2geth client.
-	l2Cli, err = ethclient.Dial(cfg.L2Config.Endpoint)
-	assert.NoError(t, err)
-
-	return err
-}
-
-func free(t *testing.T) {
-	if dbImg != nil {
-		assert.NoError(t, dbImg.Stop())
-	}
-	if l1gethImg != nil {
-		assert.NoError(t, l1gethImg.Stop())
-	}
-	if l2gethImg != nil {
-		assert.NoError(t, l2gethImg.Stop())
-	}
-}
-
-func TestFunction(t *testing.T) {
-	if err := setupEnv(t); err != nil {
-		t.Fatal(err)
-	}
-
-	// Run l2 watcher test cases.
-	t.Run("TestCreateNewWatcherAndStop", testCreateNewWatcherAndStop)
-	t.Run("TestMonitorBridgeContract", testMonitorBridgeContract)
-	t.Run("TestFetchMultipleSentMessageInOneBlock", testFetchMultipleSentMessageInOneBlock)
-
-	// Run l2 relayer test cases.
-	t.Run("TestCreateNewRelayer", testCreateNewRelayer)
-	t.Run("TestL2RelayerProcessSaveEvents", testL2RelayerProcessSaveEvents)
-	t.Run("testL2RelayerProcessPendingBatches", testL2RelayerProcessPendingBatches)
-	t.Run("testL2RelayerProcessCommittedBatches", testL2RelayerProcessCommittedBatches)
-	t.Run("testL2RelayerSkipBatches", testL2RelayerSkipBatches)
-
-	t.Run("testBatchProposer", testBatchProposer)
-
-	t.Cleanup(func() {
-		free(t)
-	})
-}

bridge/l2/relayer.go

@@ -1,485 +0,0 @@
-package l2
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"math/big"
-	"runtime"
-	"sync"
-	"time"
-
-	// not sure if this will make problems when relay with l1geth
-
-	"github.com/scroll-tech/go-ethereum/accounts/abi"
-	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/log"
-	"golang.org/x/sync/errgroup"
-	"modernc.org/mathutil"
-
-	"scroll-tech/database"
-	"scroll-tech/database/orm"
-
-	bridge_abi "scroll-tech/bridge/abi"
-	"scroll-tech/bridge/config"
-	"scroll-tech/bridge/sender"
-	"scroll-tech/bridge/utils"
-)
-
-// Layer2Relayer is responsible for
-//  1. Committing and finalizing L2 blocks on L1
-//  2. Relaying messages from L2 to L1
-//
-// Actions are triggered by new head from layer 1 geth node.
-// @todo It's better to be triggered by watcher.
-type Layer2Relayer struct {
-	ctx context.Context
-
-	db  database.OrmFactory
-	cfg *config.RelayerConfig
-
-	messageSender  *sender.Sender
-	messageCh      <-chan *sender.Confirmation
-	l1MessengerABI *abi.ABI
-
-	rollupSender *sender.Sender
-	rollupCh     <-chan *sender.Confirmation
-	l1RollupABI  *abi.ABI
-
-	// A list of processing message.
-	// key(string): confirmation ID, value(string): layer2 hash.
-	processingMessage sync.Map
-
-	// A list of processing batch commitment.
-	// key(string): confirmation ID, value(string): batch id.
-	processingCommitment sync.Map
-
-	// A list of processing batch finalization.
-	// key(string): confirmation ID, value(string): batch id.
-	processingFinalization sync.Map
-
-	stopCh chan struct{}
-}
-
-// NewLayer2Relayer will return a new instance of Layer2RelayerClient
-func NewLayer2Relayer(ctx context.Context, db database.OrmFactory, cfg *config.RelayerConfig) (*Layer2Relayer, error) {
-	// @todo use different sender for relayer, block commit and proof finalize
-	messageSender, err := sender.NewSender(ctx, cfg.SenderConfig, cfg.MessageSenderPrivateKeys)
-	if err != nil {
-		log.Error("Failed to create messenger sender", "err", err)
-		return nil, err
-	}
-
-	rollupSender, err := sender.NewSender(ctx, cfg.SenderConfig, cfg.RollupSenderPrivateKeys)
-	if err != nil {
-		log.Error("Failed to create rollup sender", "err", err)
-		return nil, err
-	}
-
-	return &Layer2Relayer{
-		ctx:                    ctx,
-		db:                     db,
-		messageSender:          messageSender,
-		messageCh:              messageSender.ConfirmChan(),
-		l1MessengerABI:         bridge_abi.L1MessengerMetaABI,
-		rollupSender:           rollupSender,
-		rollupCh:               rollupSender.ConfirmChan(),
-		l1RollupABI:            bridge_abi.RollupMetaABI,
-		cfg:                    cfg,
-		processingMessage:      sync.Map{},
-		processingCommitment:   sync.Map{},
-		processingFinalization: sync.Map{},
-		stopCh:                 make(chan struct{}),
-	}, nil
-}
-
-const processMsgLimit = 100
-
-// ProcessSavedEvents relays saved un-processed cross-domain transactions to desired blockchain
-func (r *Layer2Relayer) ProcessSavedEvents() {
-	batch, err := r.db.GetLatestFinalizedBatch()
-	if err != nil {
-		log.Error("GetLatestFinalizedBatch failed", "err", err)
-		return
-	}
-
-	// msgs are sorted by nonce in increasing order
-	msgs, err := r.db.GetL2Messages(
-		map[string]interface{}{"status": orm.MsgPending},
-		fmt.Sprintf("AND height<=%d", batch.EndBlockNumber),
-		fmt.Sprintf("ORDER BY nonce ASC LIMIT %d", processMsgLimit),
-	)
-
-	if err != nil {
-		log.Error("Failed to fetch unprocessed L2 messages", "err", err)
-		return
-	}
-
-	// process messages in batches
-	batchSize := mathutil.Min((runtime.GOMAXPROCS(0)+1)/2, r.messageSender.NumberOfAccounts())
-	for size := 0; len(msgs) > 0; msgs = msgs[size:] {
-		if size = len(msgs); size > batchSize {
-			size = batchSize
-		}
-		var g errgroup.Group
-		for _, msg := range msgs[:size] {
-			msg := msg
-			g.Go(func() error {
-				return r.processSavedEvent(msg, batch.Index)
-			})
-		}
-		if err := g.Wait(); err != nil {
-			if !errors.Is(err, sender.ErrNoAvailableAccount) {
-				log.Error("failed to process l2 saved event", "err", err)
-			}
-			return
-		}
-	}
-}
-
-func (r *Layer2Relayer) processSavedEvent(msg *orm.L2Message, index uint64) error {
-	// @todo fetch merkle proof from l2geth
-	log.Info("Processing L2 Message", "msg.nonce", msg.Nonce, "msg.height", msg.Height)
-
-	proof := bridge_abi.IL1ScrollMessengerL2MessageProof{
-		BlockHeight: big.NewInt(int64(msg.Height)),
-		BatchIndex:  big.NewInt(0).SetUint64(index),
-		MerkleProof: make([]byte, 0),
-	}
-	from := common.HexToAddress(msg.Sender)
-	target := common.HexToAddress(msg.Target)
-	value, ok := big.NewInt(0).SetString(msg.Value, 10)
-	if !ok {
-		// @todo maybe panic?
-		log.Error("Failed to parse message value", "msg.nonce", msg.Nonce, "msg.height", msg.Height)
-		// TODO: need to skip this message by changing its status to MsgError
-	}
-	fee, _ := big.NewInt(0).SetString(msg.Fee, 10)
-	deadline := big.NewInt(int64(msg.Deadline))
-	msgNonce := big.NewInt(int64(msg.Nonce))
-	calldata := common.Hex2Bytes(msg.Calldata)
-	data, err := r.l1MessengerABI.Pack("relayMessageWithProof", from, target, value, fee, deadline, msgNonce, calldata, proof)
-	if err != nil {
-		log.Error("Failed to pack relayMessageWithProof", "msg.nonce", msg.Nonce, "err", err)
-		// TODO: need to skip this message by changing its status to MsgError
-		return err
-	}
-
-	hash, err := r.messageSender.SendTransaction(msg.MsgHash, &r.cfg.MessengerContractAddress, big.NewInt(0), data)
-	if err != nil && err.Error() == "execution reverted: Message expired" {
-		return r.db.UpdateLayer2Status(r.ctx, msg.MsgHash, orm.MsgExpired)
-	}
-	if err != nil && err.Error() == "execution reverted: Message successfully executed" {
-		return r.db.UpdateLayer2Status(r.ctx, msg.MsgHash, orm.MsgConfirmed)
-	}
-	if err != nil {
-		if !errors.Is(err, sender.ErrNoAvailableAccount) {
-			log.Error("Failed to send relayMessageWithProof tx to layer1 ", "msg.height", msg.Height, "msg.MsgHash", msg.MsgHash, "err", err)
-		}
-		return err
-	}
-	log.Info("relayMessageWithProof to layer1", "msgHash", msg.MsgHash, "txhash", hash.String())
-
-	// save status in db
-	// @todo handle db error
-	err = r.db.UpdateLayer2StatusAndLayer1Hash(r.ctx, msg.MsgHash, orm.MsgSubmitted, hash.String())
-	if err != nil {
-		log.Error("UpdateLayer2StatusAndLayer1Hash failed", "msgHash", msg.MsgHash, "err", err)
-		return err
-	}
-	r.processingMessage.Store(msg.MsgHash, msg.MsgHash)
-	return nil
-}
-
-// ProcessPendingBatches submit batch data to layer 1 rollup contract
-func (r *Layer2Relayer) ProcessPendingBatches() {
-	// batches are sorted by batch index in increasing order
-	batchesInDB, err := r.db.GetPendingBatches(1)
-	if err != nil {
-		log.Error("Failed to fetch pending L2 batches", "err", err)
-		return
-	}
-	if len(batchesInDB) == 0 {
-		return
-	}
-	id := batchesInDB[0]
-	// @todo add support to relay multiple batches
-
-	batches, err := r.db.GetBlockBatches(map[string]interface{}{"id": id})
-	if err != nil || len(batches) == 0 {
-		log.Error("Failed to GetBlockBatches", "batch_id", id, "err", err)
-		return
-	}
-	batch := batches[0]
-
-	traces, err := r.db.GetBlockTraces(map[string]interface{}{"batch_id": id}, "ORDER BY number ASC")
-	if err != nil || len(traces) == 0 {
-		log.Error("Failed to GetBlockTraces", "batch_id", id, "err", err)
-		return
-	}
-
-	layer2Batch := &bridge_abi.IZKRollupLayer2Batch{
-		BatchIndex: batch.Index,
-		ParentHash: common.HexToHash(batch.ParentHash),
-		Blocks:     make([]bridge_abi.IZKRollupLayer2BlockHeader, len(traces)),
-	}
-
-	parentHash := common.HexToHash(batch.ParentHash)
-	for i, trace := range traces {
-		layer2Batch.Blocks[i] = bridge_abi.IZKRollupLayer2BlockHeader{
-			BlockHash:   trace.Header.Hash(),
-			ParentHash:  parentHash,
-			BaseFee:     trace.Header.BaseFee,
-			StateRoot:   trace.StorageTrace.RootAfter,
-			BlockHeight: trace.Header.Number.Uint64(),
-			GasUsed:     0,
-			Timestamp:   trace.Header.Time,
-			ExtraData:   make([]byte, 0),
-			Txs:         make([]bridge_abi.IZKRollupLayer2Transaction, len(trace.Transactions)),
-		}
-		for j, tx := range trace.Transactions {
-			layer2Batch.Blocks[i].Txs[j] = bridge_abi.IZKRollupLayer2Transaction{
-				Caller:   tx.From,
-				Nonce:    tx.Nonce,
-				Gas:      tx.Gas,
-				GasPrice: tx.GasPrice.ToInt(),
-				Value:    tx.Value.ToInt(),
-				Data:     common.Hex2Bytes(tx.Data),
-				R:        tx.R.ToInt(),
-				S:        tx.S.ToInt(),
-				V:        tx.V.ToInt().Uint64(),
-			}
-			if tx.To != nil {
-				layer2Batch.Blocks[i].Txs[j].Target = *tx.To
-			}
-			layer2Batch.Blocks[i].GasUsed += trace.ExecutionResults[j].Gas
-		}
-
-		// for next iteration
-		parentHash = layer2Batch.Blocks[i].BlockHash
-	}
-
-	data, err := r.l1RollupABI.Pack("commitBatch", layer2Batch)
-	if err != nil {
-		log.Error("Failed to pack commitBatch", "id", id, "index", batch.Index, "err", err)
-		return
-	}
-
-	txID := id + "-commit"
-	// add suffix `-commit` to avoid duplication with finalize tx in unit tests
-	hash, err := r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), data)
-	if err != nil {
-		if !errors.Is(err, sender.ErrNoAvailableAccount) {
-			log.Error("Failed to send commitBatch tx to layer1 ", "id", id, "index", batch.Index, "err", err)
-		}
-		return
-	}
-	log.Info("commitBatch in layer1", "batch_id", id, "index", batch.Index, "hash", hash)
-
-	// record and sync with db, @todo handle db error
-	err = r.db.UpdateCommitTxHashAndRollupStatus(r.ctx, id, hash.String(), orm.RollupCommitting)
-	if err != nil {
-		log.Error("UpdateCommitTxHashAndRollupStatus failed", "id", id, "index", batch.Index, "err", err)
-	}
-	r.processingCommitment.Store(txID, id)
-}
-
-// ProcessCommittedBatches submit proof to layer 1 rollup contract
-func (r *Layer2Relayer) ProcessCommittedBatches() {
-	// set skipped batches in a single db operation
-	if count, err := r.db.UpdateSkippedBatches(); err != nil {
-		log.Error("UpdateSkippedBatches failed", "err", err)
-		// continue anyway
-	} else if count > 0 {
-		log.Info("Skipping batches", "count", count)
-	}
-
-	// batches are sorted by batch index in increasing order
-	batches, err := r.db.GetCommittedBatches(1)
-	if err != nil {
-		log.Error("Failed to fetch committed L2 batches", "err", err)
-		return
-	}
-	if len(batches) == 0 {
-		return
-	}
-	id := batches[0]
-	// @todo add support to relay multiple batches
-
-	status, err := r.db.GetProvingStatusByID(id)
-	if err != nil {
-		log.Error("GetProvingStatusByID failed", "id", id, "err", err)
-		return
-	}
-
-	switch status {
-	case orm.ProvingTaskUnassigned, orm.ProvingTaskAssigned:
-		// The proof for this block is not ready yet.
-		return
-
-	case orm.ProvingTaskProved:
-		// It's an intermediate state. The roller manager received the proof but has not verified
-		// the proof yet. We don't roll up the proof until it's verified.
-		return
-
-	case orm.ProvingTaskFailed, orm.ProvingTaskSkipped:
-		// note: this is covered by UpdateSkippedBatches, but we keep it for completeness's sake
-
-		if err = r.db.UpdateRollupStatus(r.ctx, id, orm.RollupFinalizationSkipped); err != nil {
-			log.Warn("UpdateRollupStatus failed", "id", id, "err", err)
-		}
-
-	case orm.ProvingTaskVerified:
-		log.Info("Start to roll up zk proof", "id", id)
-		success := false
-
-		defer func() {
-			// TODO: need to revisit this and have a more fine-grained error handling
-			if !success {
-				log.Info("Failed to upload the proof, change rollup status to FinalizationSkipped", "id", id)
-				if err = r.db.UpdateRollupStatus(r.ctx, id, orm.RollupFinalizationSkipped); err != nil {
-					log.Warn("UpdateRollupStatus failed", "id", id, "err", err)
-				}
-			}
-		}()
-
-		proofBuffer, instanceBuffer, err := r.db.GetVerifiedProofAndInstanceByID(id)
-		if err != nil {
-			log.Warn("fetch get proof by id failed", "id", id, "err", err)
-			return
-		}
-		if proofBuffer == nil || instanceBuffer == nil {
-			log.Warn("proof or instance not ready", "id", id)
-			return
-		}
-		if len(proofBuffer)%32 != 0 {
-			log.Error("proof buffer has wrong length", "id", id, "length", len(proofBuffer))
-			return
-		}
-		if len(instanceBuffer)%32 != 0 {
-			log.Warn("instance buffer has wrong length", "id", id, "length", len(instanceBuffer))
-			return
-		}
-
-		proof := utils.BufferToUint256Le(proofBuffer)
-		instance := utils.BufferToUint256Le(instanceBuffer)
-		data, err := r.l1RollupABI.Pack("finalizeBatchWithProof", common.HexToHash(id), proof, instance)
-		if err != nil {
-			log.Error("Pack finalizeBatchWithProof failed", "err", err)
-			return
-		}
-
-		txID := id + "-finalize"
-		// add suffix `-finalize` to avoid duplication with commit tx in unit tests
-		txHash, err := r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), data)
-		hash := &txHash
-		if err != nil {
-			if !errors.Is(err, sender.ErrNoAvailableAccount) {
-				log.Error("finalizeBatchWithProof in layer1 failed", "id", id, "err", err)
-			}
-			return
-		}
-		log.Info("finalizeBatchWithProof in layer1", "batch_id", id, "hash", hash)
-
-		// record and sync with db, @todo handle db error
-		err = r.db.UpdateFinalizeTxHashAndRollupStatus(r.ctx, id, hash.String(), orm.RollupFinalizing)
-		if err != nil {
-			log.Warn("UpdateFinalizeTxHashAndRollupStatus failed", "batch_id", id, "err", err)
-		}
-		success = true
-		r.processingFinalization.Store(txID, id)
-
-	default:
-		log.Error("encounter unreachable case in ProcessCommittedBatches",
-			"block_status", status,
-		)
-	}
-}
-
-// Start the relayer process
-func (r *Layer2Relayer) Start() {
-	loop := func(ctx context.Context, f func()) {
-		ticker := time.NewTicker(time.Second)
-		defer ticker.Stop()
-
-		for {
-			select {
-			case <-ctx.Done():
-				return
-			case <-ticker.C:
-				f()
-			}
-		}
-	}
-
-	go func() {
-		ctx, cancel := context.WithCancel(r.ctx)
-
-		go loop(ctx, r.ProcessSavedEvents)
-		go loop(ctx, r.ProcessPendingBatches)
-		go loop(ctx, r.ProcessCommittedBatches)
-
-		go func(ctx context.Context) {
-			for {
-				select {
-				case <-ctx.Done():
-					return
-				case confirmation := <-r.messageCh:
-					r.handleConfirmation(confirmation)
-				case confirmation := <-r.rollupCh:
-					r.handleConfirmation(confirmation)
-				}
-			}
-		}(ctx)
-
-		<-r.stopCh
-		cancel()
-	}()
-}
-
-// Stop the relayer module, for a graceful shutdown.
-func (r *Layer2Relayer) Stop() {
-	close(r.stopCh)
-}
-
-func (r *Layer2Relayer) handleConfirmation(confirmation *sender.Confirmation) {
-	if !confirmation.IsSuccessful {
-		log.Warn("transaction confirmed but failed in layer1", "confirmation", confirmation)
-		return
-	}
-
-	transactionType := "Unknown"
-	// check whether it is message relay transaction
-	if msgHash, ok := r.processingMessage.Load(confirmation.ID); ok {
-		transactionType = "MessageRelay"
-		// @todo handle db error
-		err := r.db.UpdateLayer2StatusAndLayer1Hash(r.ctx, msgHash.(string), orm.MsgConfirmed, confirmation.TxHash.String())
-		if err != nil {
-			log.Warn("UpdateLayer2StatusAndLayer1Hash failed", "msgHash", msgHash.(string), "err", err)
-		}
-		r.processingMessage.Delete(confirmation.ID)
-	}
-
-	// check whether it is block commitment transaction
-	if batchID, ok := r.processingCommitment.Load(confirmation.ID); ok {
-		transactionType = "BatchCommitment"
-		// @todo handle db error
-		err := r.db.UpdateCommitTxHashAndRollupStatus(r.ctx, batchID.(string), confirmation.TxHash.String(), orm.RollupCommitted)
-		if err != nil {
-			log.Warn("UpdateCommitTxHashAndRollupStatus failed", "batch_id", batchID.(string), "err", err)
-		}
-		r.processingCommitment.Delete(confirmation.ID)
-	}
-
-	// check whether it is proof finalization transaction
-	if batchID, ok := r.processingFinalization.Load(confirmation.ID); ok {
-		transactionType = "ProofFinalization"
-		// @todo handle db error
-		err := r.db.UpdateFinalizeTxHashAndRollupStatus(r.ctx, batchID.(string), confirmation.TxHash.String(), orm.RollupFinalized)
-		if err != nil {
-			log.Warn("UpdateFinalizeTxHashAndRollupStatus failed", "batch_id", batchID.(string), "err", err)
-		}
-		r.processingFinalization.Delete(confirmation.ID)
-	}
-	log.Info("transaction confirmed in layer1", "type", transactionType, "confirmation", confirmation)
-}

bridge/l2/relayer_test.go

@@ -1,260 +0,0 @@
-package l2
-
-import (
-	"context"
-	"encoding/json"
-	"math/big"
-	"os"
-	"testing"
-	"time"
-
-	"github.com/scroll-tech/go-ethereum/core/types"
-	"github.com/stretchr/testify/assert"
-
-	"scroll-tech/database"
-	"scroll-tech/database/migrate"
-	"scroll-tech/database/orm"
-)
-
-var (
-	templateL2Message = []*orm.L2Message{
-		{
-			Nonce:      1,
-			Height:     1,
-			Sender:     "0x596a746661dbed76a84556111c2872249b070e15",
-			Value:      "100",
-			Fee:        "100",
-			GasLimit:   11529940,
-			Deadline:   uint64(time.Now().Unix()),
-			Target:     "0x2c73620b223808297ea734d946813f0dd78eb8f7",
-			Calldata:   "testdata",
-			Layer2Hash: "hash0",
-		},
-	}
-)
-
-func testCreateNewRelayer(t *testing.T) {
-	// Create db handler and reset db.
-	db, err := database.NewOrmFactory(cfg.DBConfig)
-	assert.NoError(t, err)
-	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
-	defer db.Close()
-
-	relayer, err := NewLayer2Relayer(context.Background(), db, cfg.L2Config.RelayerConfig)
-	assert.NoError(t, err)
-	defer relayer.Stop()
-
-	relayer.Start()
-}
-
-func testL2RelayerProcessSaveEvents(t *testing.T) {
-	// Create db handler and reset db.
-	db, err := database.NewOrmFactory(cfg.DBConfig)
-	assert.NoError(t, err)
-	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
-	defer db.Close()
-
-	l2Cfg := cfg.L2Config
-	relayer, err := NewLayer2Relayer(context.Background(), db, l2Cfg.RelayerConfig)
-	assert.NoError(t, err)
-	defer relayer.Stop()
-
-	err = db.SaveL2Messages(context.Background(), templateL2Message)
-	assert.NoError(t, err)
-
-	traces := []*types.BlockTrace{
-		{
-			Header: &types.Header{
-				Number: big.NewInt(int64(templateL2Message[0].Height)),
-			},
-		},
-		{
-			Header: &types.Header{
-				Number: big.NewInt(int64(templateL2Message[0].Height + 1)),
-			},
-		},
-	}
-	err = db.InsertBlockTraces(traces)
-	assert.NoError(t, err)
-
-	dbTx, err := db.Beginx()
-	assert.NoError(t, err)
-	batchID, err := db.NewBatchInDBTx(dbTx,
-		&orm.BlockInfo{Number: templateL2Message[0].Height},
-		&orm.BlockInfo{Number: templateL2Message[0].Height + 1},
-		"0f", 1, 194676) // parentHash & totalTxNum & totalL2Gas don't really matter here
-	assert.NoError(t, err)
-	err = db.SetBatchIDForBlocksInDBTx(dbTx, []uint64{
-		templateL2Message[0].Height,
-		templateL2Message[0].Height + 1}, batchID)
-	assert.NoError(t, err)
-	err = dbTx.Commit()
-	assert.NoError(t, err)
-
-	err = db.UpdateRollupStatus(context.Background(), batchID, orm.RollupFinalized)
-	assert.NoError(t, err)
-
-	relayer.ProcessSavedEvents()
-
-	msg, err := db.GetL2MessageByNonce(templateL2Message[0].Nonce)
-	assert.NoError(t, err)
-	assert.Equal(t, orm.MsgSubmitted, msg.Status)
-}
-
-func testL2RelayerProcessPendingBatches(t *testing.T) {
-	// Create db handler and reset db.
-	db, err := database.NewOrmFactory(cfg.DBConfig)
-	assert.NoError(t, err)
-	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
-	defer db.Close()
-
-	l2Cfg := cfg.L2Config
-	relayer, err := NewLayer2Relayer(context.Background(), db, l2Cfg.RelayerConfig)
-	assert.NoError(t, err)
-	defer relayer.Stop()
-
-	// this blockresult has number of 0x4, need to change it to match the testcase
-	// In this testcase scenario, db will store two blocks with height 0x4 and 0x3
-	var traces []*types.BlockTrace
-
-	templateBlockTrace, err := os.ReadFile("../../common/testdata/blockTrace_02.json")
-	assert.NoError(t, err)
-	blockTrace := &types.BlockTrace{}
-	err = json.Unmarshal(templateBlockTrace, blockTrace)
-	assert.NoError(t, err)
-	traces = append(traces, blockTrace)
-	templateBlockTrace, err = os.ReadFile("../../common/testdata/blockTrace_03.json")
-	assert.NoError(t, err)
-	blockTrace = &types.BlockTrace{}
-	err = json.Unmarshal(templateBlockTrace, blockTrace)
-	assert.NoError(t, err)
-	traces = append(traces, blockTrace)
-
-	err = db.InsertBlockTraces(traces)
-	assert.NoError(t, err)
-
-	dbTx, err := db.Beginx()
-	assert.NoError(t, err)
-	batchID, err := db.NewBatchInDBTx(dbTx,
-		&orm.BlockInfo{Number: traces[0].Header.Number.Uint64()},
-		&orm.BlockInfo{Number: traces[1].Header.Number.Uint64()},
-		"ff", 1, 194676) // parentHash & totalTxNum & totalL2Gas don't really matter here
-	assert.NoError(t, err)
-	err = db.SetBatchIDForBlocksInDBTx(dbTx, []uint64{
-		traces[0].Header.Number.Uint64(),
-		traces[1].Header.Number.Uint64()}, batchID)
-	assert.NoError(t, err)
-	err = dbTx.Commit()
-	assert.NoError(t, err)
-
-	// err = db.UpdateRollupStatus(context.Background(), batchID, orm.RollupPending)
-	// assert.NoError(t, err)
-
-	relayer.ProcessPendingBatches()
-
-	// Check if Rollup Result is changed successfully
-	status, err := db.GetRollupStatus(batchID)
-	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupCommitting, status)
-}
-
-func testL2RelayerProcessCommittedBatches(t *testing.T) {
-	// Create db handler and reset db.
-	db, err := database.NewOrmFactory(cfg.DBConfig)
-	assert.NoError(t, err)
-	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
-	defer db.Close()
-
-	l2Cfg := cfg.L2Config
-	relayer, err := NewLayer2Relayer(context.Background(), db, l2Cfg.RelayerConfig)
-	assert.NoError(t, err)
-	defer relayer.Stop()
-
-	dbTx, err := db.Beginx()
-	assert.NoError(t, err)
-	batchID, err := db.NewBatchInDBTx(dbTx, &orm.BlockInfo{}, &orm.BlockInfo{}, "0", 1, 194676) // startBlock & endBlock & parentHash & totalTxNum & totalL2Gas don't really matter here
-	assert.NoError(t, err)
-	err = dbTx.Commit()
-	assert.NoError(t, err)
-
-	err = db.UpdateRollupStatus(context.Background(), batchID, orm.RollupCommitted)
-	assert.NoError(t, err)
-
-	tProof := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
-	tInstanceCommitments := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
-	err = db.UpdateProofByID(context.Background(), batchID, tProof, tInstanceCommitments, 100)
-	assert.NoError(t, err)
-	err = db.UpdateProvingStatus(batchID, orm.ProvingTaskVerified)
-	assert.NoError(t, err)
-
-	relayer.ProcessCommittedBatches()
-
-	status, err := db.GetRollupStatus(batchID)
-	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupFinalizing, status)
-}
-
-func testL2RelayerSkipBatches(t *testing.T) {
-	// Create db handler and reset db.
-	db, err := database.NewOrmFactory(cfg.DBConfig)
-	assert.NoError(t, err)
-	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
-	defer db.Close()
-
-	l2Cfg := cfg.L2Config
-	relayer, err := NewLayer2Relayer(context.Background(), db, l2Cfg.RelayerConfig)
-	assert.NoError(t, err)
-	defer relayer.Stop()
-
-	createBatch := func(rollupStatus orm.RollupStatus, provingStatus orm.ProvingStatus) string {
-		dbTx, err := db.Beginx()
-		assert.NoError(t, err)
-		batchID, err := db.NewBatchInDBTx(dbTx, &orm.BlockInfo{}, &orm.BlockInfo{}, "0", 1, 194676) // startBlock & endBlock & parentHash & totalTxNum & totalL2Gas don't really matter here
-		assert.NoError(t, err)
-		err = dbTx.Commit()
-		assert.NoError(t, err)
-
-		err = db.UpdateRollupStatus(context.Background(), batchID, rollupStatus)
-		assert.NoError(t, err)
-
-		tProof := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
-		tInstanceCommitments := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
-		err = db.UpdateProofByID(context.Background(), batchID, tProof, tInstanceCommitments, 100)
-		assert.NoError(t, err)
-		err = db.UpdateProvingStatus(batchID, provingStatus)
-		assert.NoError(t, err)
-
-		return batchID
-	}
-
-	skipped := []string{
-		createBatch(orm.RollupCommitted, orm.ProvingTaskSkipped),
-		createBatch(orm.RollupCommitted, orm.ProvingTaskFailed),
-	}
-
-	notSkipped := []string{
-		createBatch(orm.RollupPending, orm.ProvingTaskSkipped),
-		createBatch(orm.RollupCommitting, orm.ProvingTaskSkipped),
-		createBatch(orm.RollupFinalizing, orm.ProvingTaskSkipped),
-		createBatch(orm.RollupFinalized, orm.ProvingTaskSkipped),
-		createBatch(orm.RollupPending, orm.ProvingTaskFailed),
-		createBatch(orm.RollupCommitting, orm.ProvingTaskFailed),
-		createBatch(orm.RollupFinalizing, orm.ProvingTaskFailed),
-		createBatch(orm.RollupFinalized, orm.ProvingTaskFailed),
-		createBatch(orm.RollupCommitted, orm.ProvingTaskVerified),
-	}
-
-	relayer.ProcessCommittedBatches()
-
-	for _, id := range skipped {
-		status, err := db.GetRollupStatus(id)
-		assert.NoError(t, err)
-		assert.Equal(t, orm.RollupFinalizationSkipped, status)
-	}
-
-	for _, id := range notSkipped {
-		status, err := db.GetRollupStatus(id)
-		assert.NoError(t, err)
-		assert.NotEqual(t, orm.RollupFinalizationSkipped, status)
-	}
-}

bridge/l2/watcher.go

@@ -1,433 +0,0 @@
-package l2
-
-import (
-	"context"
-	"fmt"
-	"math/big"
-	"reflect"
-	"time"
-
-	geth "github.com/scroll-tech/go-ethereum"
-	"github.com/scroll-tech/go-ethereum/accounts/abi"
-	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/core/types"
-	"github.com/scroll-tech/go-ethereum/ethclient"
-	"github.com/scroll-tech/go-ethereum/event"
-	"github.com/scroll-tech/go-ethereum/log"
-	"github.com/scroll-tech/go-ethereum/metrics"
-	"github.com/scroll-tech/go-ethereum/rpc"
-
-	bridge_abi "scroll-tech/bridge/abi"
-	"scroll-tech/bridge/utils"
-
-	"scroll-tech/database"
-	"scroll-tech/database/orm"
-
-	"scroll-tech/bridge/config"
-)
-
-// Metrics
-var (
-	bridgeL2MsgSyncHeightGauge = metrics.NewRegisteredGauge("bridge/l2/msg/sync/height", nil)
-)
-
-type relayedMessage struct {
-	msgHash      common.Hash
-	txHash       common.Hash
-	isSuccessful bool
-}
-
-// WatcherClient provide APIs which support others to subscribe to various event from l2geth
-type WatcherClient struct {
-	ctx context.Context
-	event.Feed
-
-	*ethclient.Client
-
-	orm database.OrmFactory
-
-	confirmations    rpc.BlockNumber
-	messengerAddress common.Address
-	messengerABI     *abi.ABI
-
-	// The height of the block that the watcher has retrieved event logs
-	processedMsgHeight uint64
-
-	stopped uint64
-	stopCh  chan struct{}
-
-	batchProposer *batchProposer
-}
-
-// NewL2WatcherClient take a l2geth instance to generate a l2watcherclient instance
-func NewL2WatcherClient(ctx context.Context, client *ethclient.Client, confirmations rpc.BlockNumber, bpCfg *config.BatchProposerConfig, messengerAddress common.Address, orm database.OrmFactory) *WatcherClient {
-	savedHeight, err := orm.GetLayer2LatestWatchedHeight()
-	if err != nil {
-		log.Warn("fetch height from db failed", "err", err)
-		savedHeight = 0
-	}
-
-	w := WatcherClient{
-		ctx:                ctx,
-		Client:             client,
-		orm:                orm,
-		processedMsgHeight: uint64(savedHeight),
-		confirmations:      confirmations,
-		messengerAddress:   messengerAddress,
-		messengerABI:       bridge_abi.L2MessengerMetaABI,
-		stopCh:             make(chan struct{}),
-		stopped:            0,
-		batchProposer:      newBatchProposer(bpCfg, orm),
-	}
-
-	// Initialize genesis before we do anything else
-	if err := w.initializeGenesis(); err != nil {
-		panic(fmt.Sprintf("failed to initialize L2 genesis batch, err: %v", err))
-	}
-
-	return &w
-}
-
-func (w *WatcherClient) initializeGenesis() error {
-	if count, err := w.orm.GetBatchCount(); err != nil {
-		return fmt.Errorf("failed to get batch count: %v", err)
-	} else if count > 0 {
-		log.Info("genesis already imported")
-		return nil
-	}
-
-	genesis, err := w.HeaderByNumber(w.ctx, big.NewInt(0))
-	if err != nil {
-		return fmt.Errorf("failed to retrieve L2 genesis header: %v", err)
-	}
-
-	// EIP1559 is disabled so the RPC won't return baseFeePerGas. However, l2geth
-	// still uses BaseFee when calculating the block hash. If we keep it as <nil>
-	// here the genesis hash will not match.
-	genesis.BaseFee = big.NewInt(0)
-
-	log.Info("retrieved L2 genesis header", "hash", genesis.Hash().String())
-
-	trace := &types.BlockTrace{
-		Coinbase:         nil,
-		Header:           genesis,
-		Transactions:     []*types.TransactionData{},
-		StorageTrace:     nil,
-		ExecutionResults: []*types.ExecutionResult{},
-		MPTWitness:       nil,
-	}
-
-	if err := w.orm.InsertBlockTraces([]*types.BlockTrace{trace}); err != nil {
-		return fmt.Errorf("failed to insert block traces: %v", err)
-	}
-
-	blocks, err := w.orm.GetUnbatchedBlocks(map[string]interface{}{})
-	if err != nil {
-		return err
-	}
-
-	if len(blocks) != 1 {
-		return fmt.Errorf("unexpected number of unbatched blocks in db, expected: 1, actual: %v", len(blocks))
-	}
-
-	batchID, err := w.batchProposer.createBatchForBlocks(blocks)
-	if err != nil {
-		return fmt.Errorf("failed to create batch: %v", err)
-	}
-
-	err = w.orm.UpdateProvingStatus(batchID, orm.ProvingTaskProved)
-	if err != nil {
-		return fmt.Errorf("failed to update genesis batch proving status: %v", err)
-	}
-
-	err = w.orm.UpdateRollupStatus(w.ctx, batchID, orm.RollupFinalized)
-	if err != nil {
-		return fmt.Errorf("failed to update genesis batch rollup status: %v", err)
-	}
-
-	log.Info("successfully imported genesis batch")
-
-	return nil
-}
-
-// Start the Listening process
-func (w *WatcherClient) Start() {
-	go func() {
-		if reflect.ValueOf(w.orm).IsNil() {
-			panic("must run L2 watcher with DB")
-		}
-
-		ctx, cancel := context.WithCancel(w.ctx)
-
-		// trace fetcher loop
-		go func(ctx context.Context) {
-			ticker := time.NewTicker(3 * time.Second)
-			defer ticker.Stop()
-
-			for {
-				select {
-				case <-ctx.Done():
-					return
-
-				case <-ticker.C:
-					number, err := utils.GetLatestConfirmedBlockNumber(ctx, w.Client, w.confirmations)
-					if err != nil {
-						log.Error("failed to get block number", "err", err)
-						continue
-					}
-
-					w.tryFetchRunningMissingBlocks(ctx, number)
-				}
-			}
-		}(ctx)
-
-		// event fetcher loop
-		go func(ctx context.Context) {
-			ticker := time.NewTicker(3 * time.Second)
-			defer ticker.Stop()
-
-			for {
-				select {
-				case <-ctx.Done():
-					return
-
-				case <-ticker.C:
-					number, err := utils.GetLatestConfirmedBlockNumber(ctx, w.Client, w.confirmations)
-					if err != nil {
-						log.Error("failed to get block number", "err", err)
-						continue
-					}
-
-					w.FetchContractEvent(number)
-				}
-			}
-		}(ctx)
-
-		// batch proposer loop
-		go func(ctx context.Context) {
-			ticker := time.NewTicker(3 * time.Second)
-			defer ticker.Stop()
-
-			for {
-				select {
-				case <-ctx.Done():
-					return
-
-				case <-ticker.C:
-					w.batchProposer.tryProposeBatch()
-				}
-			}
-		}(ctx)
-
-		<-w.stopCh
-		cancel()
-	}()
-}
-
-// Stop the Watcher module, for a graceful shutdown.
-func (w *WatcherClient) Stop() {
-	w.stopCh <- struct{}{}
-}
-
-const blockTracesFetchLimit = uint64(10)
-
-// try fetch missing blocks if inconsistent
-func (w *WatcherClient) tryFetchRunningMissingBlocks(ctx context.Context, blockHeight uint64) {
-	// Get newest block in DB. must have blocks at that time.
-	// Don't use "block_trace" table "trace" column's BlockTrace.Number,
-	// because it might be empty if the corresponding rollup_result is finalized/finalization_skipped
-	heightInDB, err := w.orm.GetBlockTracesLatestHeight()
-	if err != nil {
-		log.Error("failed to GetBlockTracesLatestHeight", "err", err)
-		return
-	}
-
-	// Can't get trace from genesis block, so the default start number is 1.
-	var from = uint64(1)
-	if heightInDB > 0 {
-		from = uint64(heightInDB) + 1
-	}
-
-	for ; from <= blockHeight; from += blockTracesFetchLimit {
-		to := from + blockTracesFetchLimit - 1
-
-		if to > blockHeight {
-			to = blockHeight
-		}
-
-		// Get block traces and insert into db.
-		if err = w.getAndStoreBlockTraces(ctx, from, to); err != nil {
-			log.Error("fail to getAndStoreBlockTraces", "from", from, "to", to, "err", err)
-			return
-		}
-	}
-}
-
-func (w *WatcherClient) getAndStoreBlockTraces(ctx context.Context, from, to uint64) error {
-	var traces []*types.BlockTrace
-
-	for number := from; number <= to; number++ {
-		log.Debug("retrieving block trace", "height", number)
-		trace, err2 := w.GetBlockTraceByNumber(ctx, big.NewInt(int64(number)))
-		if err2 != nil {
-			return fmt.Errorf("failed to GetBlockResultByHash: %v. number: %v", err2, number)
-		}
-		log.Info("retrieved block trace", "height", trace.Header.Number, "hash", trace.Header.Hash().String())
-
-		traces = append(traces, trace)
-
-	}
-	if len(traces) > 0 {
-		if err := w.orm.InsertBlockTraces(traces); err != nil {
-			return fmt.Errorf("failed to batch insert BlockTraces: %v", err)
-		}
-	}
-
-	return nil
-}
-
-const contractEventsBlocksFetchLimit = int64(10)
-
-// FetchContractEvent pull latest event logs from given contract address and save in DB
-func (w *WatcherClient) FetchContractEvent(blockHeight uint64) {
-	defer func() {
-		log.Info("l2 watcher fetchContractEvent", "w.processedMsgHeight", w.processedMsgHeight)
-	}()
-
-	fromBlock := int64(w.processedMsgHeight) + 1
-	toBlock := int64(blockHeight)
-
-	for from := fromBlock; from <= toBlock; from += contractEventsBlocksFetchLimit {
-		to := from + contractEventsBlocksFetchLimit - 1
-
-		if to > toBlock {
-			to = toBlock
-		}
-
-		// warning: uint int conversion...
-		query := geth.FilterQuery{
-			FromBlock: big.NewInt(from), // inclusive
-			ToBlock:   big.NewInt(to),   // inclusive
-			Addresses: []common.Address{
-				w.messengerAddress,
-			},
-			Topics: make([][]common.Hash, 1),
-		}
-		query.Topics[0] = make([]common.Hash, 3)
-		query.Topics[0][0] = common.HexToHash(bridge_abi.SentMessageEventSignature)
-		query.Topics[0][1] = common.HexToHash(bridge_abi.RelayedMessageEventSignature)
-		query.Topics[0][2] = common.HexToHash(bridge_abi.FailedRelayedMessageEventSignature)
-
-		logs, err := w.FilterLogs(w.ctx, query)
-		if err != nil {
-			log.Error("failed to get event logs", "err", err)
-			return
-		}
-		if len(logs) == 0 {
-			w.processedMsgHeight = uint64(to)
-			bridgeL2MsgSyncHeightGauge.Update(to)
-			continue
-		}
-		log.Info("received new L2 messages", "fromBlock", from, "toBlock", to, "cnt", len(logs))
-
-		sentMessageEvents, relayedMessageEvents, err := w.parseBridgeEventLogs(logs)
-		if err != nil {
-			log.Error("failed to parse emitted event log", "err", err)
-			return
-		}
-
-		// Update relayed message first to make sure we don't forget to update submited message.
-		// Since, we always start sync from the latest unprocessed message.
-		for _, msg := range relayedMessageEvents {
-			if msg.isSuccessful {
-				// succeed
-				err = w.orm.UpdateLayer1StatusAndLayer2Hash(w.ctx, msg.msgHash.String(), orm.MsgConfirmed, msg.txHash.String())
-			} else {
-				// failed
-				err = w.orm.UpdateLayer1StatusAndLayer2Hash(w.ctx, msg.msgHash.String(), orm.MsgFailed, msg.txHash.String())
-			}
-			if err != nil {
-				log.Error("Failed to update layer1 status and layer2 hash", "err", err)
-				return
-			}
-		}
-
-		if err = w.orm.SaveL2Messages(w.ctx, sentMessageEvents); err != nil {
-			log.Error("failed to save l2 messages", "err", err)
-			return
-		}
-
-		w.processedMsgHeight = uint64(to)
-		bridgeL2MsgSyncHeightGauge.Update(to)
-	}
-}
-
-func (w *WatcherClient) parseBridgeEventLogs(logs []types.Log) ([]*orm.L2Message, []relayedMessage, error) {
-	// Need use contract abi to parse event Log
-	// Can only be tested after we have our contracts set up
-
-	var l2Messages []*orm.L2Message
-	var relayedMessages []relayedMessage
-	for _, vLog := range logs {
-		switch vLog.Topics[0] {
-		case common.HexToHash(bridge_abi.SentMessageEventSignature):
-			event := struct {
-				Target       common.Address
-				Sender       common.Address
-				Value        *big.Int // uint256
-				Fee          *big.Int // uint256
-				Deadline     *big.Int // uint256
-				Message      []byte
-				MessageNonce *big.Int // uint256
-				GasLimit     *big.Int // uint256
-			}{}
-
-			err := w.messengerABI.UnpackIntoInterface(&event, "SentMessage", vLog.Data)
-			if err != nil {
-				log.Error("failed to unpack layer2 SentMessage event", "err", err)
-				return l2Messages, relayedMessages, err
-			}
-			// target is in topics[1]
-			event.Target = common.HexToAddress(vLog.Topics[1].String())
-			l2Messages = append(l2Messages, &orm.L2Message{
-				Nonce:      event.MessageNonce.Uint64(),
-				MsgHash:    utils.ComputeMessageHash(event.Sender, event.Target, event.Value, event.Fee, event.Deadline, event.Message, event.MessageNonce).String(),
-				Height:     vLog.BlockNumber,
-				Sender:     event.Sender.String(),
-				Value:      event.Value.String(),
-				Fee:        event.Fee.String(),
-				GasLimit:   event.GasLimit.Uint64(),
-				Deadline:   event.Deadline.Uint64(),
-				Target:     event.Target.String(),
-				Calldata:   common.Bytes2Hex(event.Message),
-				Layer2Hash: vLog.TxHash.Hex(),
-			})
-		case common.HexToHash(bridge_abi.RelayedMessageEventSignature):
-			event := struct {
-				MsgHash common.Hash
-			}{}
-			// MsgHash is in topics[1]
-			event.MsgHash = common.HexToHash(vLog.Topics[1].String())
-			relayedMessages = append(relayedMessages, relayedMessage{
-				msgHash:      event.MsgHash,
-				txHash:       vLog.TxHash,
-				isSuccessful: true,
-			})
-		case common.HexToHash(bridge_abi.FailedRelayedMessageEventSignature):
-			event := struct {
-				MsgHash common.Hash
-			}{}
-			// MsgHash is in topics[1]
-			event.MsgHash = common.HexToHash(vLog.Topics[1].String())
-			relayedMessages = append(relayedMessages, relayedMessage{
-				msgHash:      event.MsgHash,
-				txHash:       vLog.TxHash,
-				isSuccessful: false,
-			})
-		default:
-			log.Error("Unknown event", "topic", vLog.Topics[0], "txHash", vLog.TxHash)
-		}
-	}
-
-	return l2Messages, relayedMessages, nil
-}

bridge/l2/watcher_api.go

@@ -1,5 +0,0 @@
-package l2
-
-// WatcherAPI watcher api service
-type WatcherAPI interface {
-}

bridge/mock_bridge/MockBridgeL1.sol

@@ -2,98 +2,120 @@
 pragma solidity ^0.8.0;
 
 contract MockBridgeL1 {
+  /******************************
+   * Events from L1MessageQueue *
+   ******************************/
+
+  /// @notice Emitted when a new L1 => L2 transaction is appended to the queue.
+  /// @param sender The address of account who initiates the transaction.
+  /// @param target The address of account who will recieve the transaction.
+  /// @param value The value passed with the transaction.
+  /// @param queueIndex The index of this transaction in the queue.
+  /// @param gasLimit Gas limit required to complete the message relay on L2.
+  /// @param data The calldata of the transaction.
+  event QueueTransaction(
+    address indexed sender,
+    address indexed target,
+    uint256 value,
+    uint256 queueIndex,
+    uint256 gasLimit,
+    bytes data
+  );
+
   /*********************************
    * Events from L1ScrollMessenger *
    *********************************/
 
+  /// @notice Emitted when a cross domain message is sent.
+  /// @param sender The address of the sender who initiates the message.
+  /// @param target The address of target contract to call.
+  /// @param value The amount of value passed to the target contract.
+  /// @param messageNonce The nonce of the message.
+  /// @param gasLimit The optional gas limit passed to L1 or L2.
+  /// @param message The calldata passed to the target contract.
   event SentMessage(
+    address indexed sender,
     address indexed target,
-    address sender,
     uint256 value,
-    uint256 fee,
-    uint256 deadline,
-    bytes message,
     uint256 messageNonce,
-    uint256 gasLimit
+    uint256 gasLimit,
+    bytes message
   );
 
-  event MessageDropped(bytes32 indexed msgHash);
+  /// @notice Emitted when a cross domain message is relayed successfully.
+  /// @param messageHash The hash of the message.
+  event RelayedMessage(bytes32 indexed messageHash);
 
-  event RelayedMessage(bytes32 indexed msgHash);
+  /// @dev The maximum number of transaction in on batch.
+  uint256 public immutable maxNumTxInBatch;
 
-  event FailedRelayedMessage(bytes32 indexed msgHash);
+  /// @dev The hash used for padding public inputs.
+  bytes32 public immutable paddingTxHash;
 
-  /************************
-   * Events from ZKRollup *
-   ************************/
+  /***************************
+   * Events from ScrollChain *
+   ***************************/
 
   /// @notice Emitted when a new batch is commited.
-  /// @param _batchHash The hash of the batch
-  /// @param _batchIndex The index of the batch
-  /// @param _parentHash The hash of parent batch
-  event CommitBatch(bytes32 indexed _batchId, bytes32 _batchHash, uint256 _batchIndex, bytes32 _parentHash);
+  /// @param batchHash The hash of the batch
+  event CommitBatch(bytes32 indexed batchHash);
 
   /// @notice Emitted when a batch is reverted.
-  /// @param _batchId The identification of the batch.
-  event RevertBatch(bytes32 indexed _batchId);
+  /// @param batchHash The identification of the batch.
+  event RevertBatch(bytes32 indexed batchHash);
 
   /// @notice Emitted when a batch is finalized.
-  /// @param _batchHash The hash of the batch
-  /// @param _batchIndex The index of the batch
-  /// @param _parentHash The hash of parent batch
-  event FinalizeBatch(bytes32 indexed _batchId, bytes32 _batchHash, uint256 _batchIndex, bytes32 _parentHash);
+  /// @param batchHash The hash of the batch
+  event FinalizeBatch(bytes32 indexed batchHash);
 
   /***********
    * Structs *
    ***********/
 
-  struct L2MessageProof {
-    uint256 batchIndex;
-    uint256 blockHeight;
-    bytes merkleProof;
-  }
-
-  /// @dev The transanction struct
-  struct Layer2Transaction {
-    address caller;
-    uint64 nonce;
-    address target;
-    uint64 gas;
-    uint256 gasPrice;
-    uint256 value;
-    bytes data;
-    // signature
-    uint256 r;
-    uint256 s;
-    uint64 v;
-  }
-
-  /// @dev The block header struct
-  struct Layer2BlockHeader {
+  struct BlockContext {
+    // The hash of this block.
     bytes32 blockHash;
+    // The parent hash of this block.
     bytes32 parentHash;
-    uint256 baseFee;
-    bytes32 stateRoot;
-    uint64 blockHeight;
-    uint64 gasUsed;
+    // The height of this block.
+    uint64 blockNumber;
+    // The timestamp of this block.
     uint64 timestamp;
-    bytes extraData;
-    Layer2Transaction[] txs;
+    // The base fee of this block.
+    // Currently, it is not used, because we disable EIP-1559.
+    // We keep it for future proof.
+    uint256 baseFee;
+    // The gas limit of this block.
+    uint64 gasLimit;
+    // The number of transactions in this block, both L1 & L2 txs.
+    uint16 numTransactions;
+    // The number of l1 messages in this block.
+    uint16 numL1Messages;
   }
 
-  /// @dev The batch struct, the batch hash is always the last block hash of `blocks`.
-  struct Layer2Batch {
+  struct Batch {
+    // The list of blocks in this batch
+    BlockContext[] blocks; // MAX_NUM_BLOCKS = 100, about 5 min
+    // The state root of previous batch.
+    // The first batch will use 0x0 for prevStateRoot
+    bytes32 prevStateRoot;
+    // The state root of the last block in this batch.
+    bytes32 newStateRoot;
+    // The withdraw trie root of the last block in this batch.
+    bytes32 withdrawTrieRoot;
+    // The index of the batch.
     uint64 batchIndex;
-    // The hash of the last block in the parent batch
-    bytes32 parentHash;
-    Layer2BlockHeader[] blocks;
+    // The parent batch hash.
+    bytes32 parentBatchHash;
+    // Concatenated raw data of RLP encoded L2 txs
+    bytes l2Transactions;
   }
 
-  struct Layer2BatchStored {
+  struct L2MessageProof {
+    // The hash of the batch where the message belongs to.
     bytes32 batchHash;
-    bytes32 parentHash;
-    uint64 batchIndex;
-    bool verified;
+    // Concatenation of merkle proof for withdraw merkle trie.
+    bytes merkleProof;
   }
 
   /*************
@@ -103,27 +125,39 @@ contract MockBridgeL1 {
   /// @notice Message nonce, used to avoid relay attack.
   uint256 public messageNonce;
 
-  /// @notice Mapping from batch id to batch struct.
-  mapping(bytes32 => Layer2BatchStored) public batches;
+  /***************
+   * Constructor *
+   ***************/
+
+  constructor() {
+    maxNumTxInBatch = 44;
+    paddingTxHash = 0x0000000000000000000000000000000000000000000000000000000000000000;
+  }
+
+  /***********************************
+   * Functions from L2GasPriceOracle *
+   ***********************************/
+
+  function setL2BaseFee(uint256) external {
+  }
 
   /************************************
    * Functions from L1ScrollMessenger *
    ************************************/
 
   function sendMessage(
-    address _to,
-    uint256 _fee,
-    bytes memory _message,
-    uint256 _gasLimit
+    address target,
+    uint256 value,
+    bytes calldata message,
+    uint256 gasLimit
   ) external payable {
-    // solhint-disable-next-line not-rely-on-time
-    uint256 _deadline = block.timestamp + 1 days;
-    uint256 _value;
-    unchecked {
-      _value = msg.value - _fee;
+    bytes memory _xDomainCalldata = _encodeXDomainCalldata(msg.sender, target, value, messageNonce, message);
+    {
+      address _sender = applyL1ToL2Alias(address(this));
+      emit QueueTransaction(_sender, target, 0, messageNonce, gasLimit, _xDomainCalldata);
     }
-    uint256 _nonce = messageNonce;
-    emit SentMessage(_to, msg.sender, _value, _fee, _deadline, _message, _nonce, _gasLimit);
+
+    emit SentMessage(msg.sender, target, value, messageNonce, gasLimit, message);
     messageNonce += 1;
   }
 
@@ -131,57 +165,216 @@ contract MockBridgeL1 {
     address _from,
     address _to,
     uint256 _value,
-    uint256 _fee,
-    uint256 _deadline,
     uint256 _nonce,
     bytes memory _message,
     L2MessageProof memory
   ) external {
-    bytes32 _msghash = keccak256(abi.encodePacked(_from, _to, _value, _fee, _deadline, _nonce, _message));
-    emit RelayedMessage(_msghash);
+    bytes memory _xDomainCalldata = _encodeXDomainCalldata(_from, _to, _value, _nonce, _message);
+    bytes32 _xDomainCalldataHash = keccak256(_xDomainCalldata);
+    emit RelayedMessage(_xDomainCalldataHash);
   }
 
-  /***************************
-   * Functions from ZKRollup *
-   ***************************/
+  /******************************
+   * Functions from ScrollChain *
+   ******************************/
 
-  function commitBatch(Layer2Batch memory _batch) external {
-    bytes32 _batchHash = _batch.blocks[_batch.blocks.length - 1].blockHash;
-    bytes32 _batchId = _computeBatchId(_batchHash, _batch.parentHash, _batch.batchIndex);
-
-    Layer2BatchStored storage _batchStored = batches[_batchId];
-    _batchStored.batchHash = _batchHash;
-    _batchStored.parentHash = _batch.parentHash;
-    _batchStored.batchIndex = _batch.batchIndex;
-
-    emit CommitBatch(_batchId, _batchHash, _batch.batchIndex, _batch.parentHash);
+  function commitBatch(Batch memory _batch) external {
+    _commitBatch(_batch);
   }
-  
-  function revertBatch(bytes32 _batchId) external {
-    emit RevertBatch(_batchId);
+
+  function commitBatches(Batch[] memory _batches) external {
+    for (uint256 i = 0; i < _batches.length; i++) {
+      _commitBatch(_batches[i]);
+    }
+  }
+
+  function revertBatch(bytes32 _batchHash) external {
+    emit RevertBatch(_batchHash);
   }
 
   function finalizeBatchWithProof(
-    bytes32 _batchId,
+    bytes32 _batchHash,
     uint256[] memory,
     uint256[] memory
   ) external {
-    Layer2BatchStored storage _batch = batches[_batchId];
-    uint256 _batchIndex = _batch.batchIndex;
-
-    emit FinalizeBatch(_batchId, _batch.batchHash, _batchIndex, _batch.parentHash);
+    emit FinalizeBatch(_batchHash);
   }
 
-  /// @dev Internal function to compute a unique batch id for mapping.
-  /// @param _batchHash The hash of the batch.
-  /// @param _parentHash The hash of the batch.
-  /// @param _batchIndex The index of the batch.
-  /// @return Return the computed batch id.
-  function _computeBatchId(
-    bytes32 _batchHash,
-    bytes32 _parentHash,
-    uint256 _batchIndex
-  ) internal pure returns (bytes32) {
-    return keccak256(abi.encode(_batchHash, _parentHash, _batchIndex));
+  /**********************
+   * Internal Functions *
+   **********************/
+
+  function _commitBatch(Batch memory _batch) internal {
+    bytes32 _batchHash = _computePublicInputHash(_batch);
+    emit CommitBatch(_batchHash);
   }
-}
+
+  /// @dev Internal function to generate the correct cross domain calldata for a message.
+  /// @param _sender Message sender address.
+  /// @param _target Target contract address.
+  /// @param _value The amount of ETH pass to the target.
+  /// @param _messageNonce Nonce for the provided message.
+  /// @param _message Message to send to the target.
+  /// @return ABI encoded cross domain calldata.
+  function _encodeXDomainCalldata(
+    address _sender,
+    address _target,
+    uint256 _value,
+    uint256 _messageNonce,
+    bytes memory _message
+  ) internal pure returns (bytes memory) {
+    return
+      abi.encodeWithSignature(
+        "relayMessage(address,address,uint256,uint256,bytes)",
+        _sender,
+        _target,
+        _value,
+        _messageNonce,
+        _message
+      );
+  }
+
+  function applyL1ToL2Alias(address l1Address) internal pure returns (address l2Address) {
+    uint160 offset = uint160(0x1111000000000000000000000000000000001111);
+    unchecked {
+      l2Address = address(uint160(l1Address) + offset);
+    }
+  }
+
+  /// @dev Internal function to compute the public input hash.
+  /// @param batch The batch to compute.
+  function _computePublicInputHash(Batch memory batch)
+    internal
+    view
+    returns (
+      bytes32
+    )
+  {
+    uint256 publicInputsPtr;
+    // 1. append prevStateRoot, newStateRoot and withdrawTrieRoot to public inputs
+    {
+      bytes32 prevStateRoot = batch.prevStateRoot;
+      bytes32 newStateRoot = batch.newStateRoot;
+      bytes32 withdrawTrieRoot = batch.withdrawTrieRoot;
+      // number of bytes in public inputs: 32 * 3 + 124 * blocks + 32 * MAX_NUM_TXS
+      uint256 publicInputsSize = 32 * 3 + batch.blocks.length * 124 + 32 * maxNumTxInBatch;
+      assembly {
+        publicInputsPtr := mload(0x40)
+        mstore(0x40, add(publicInputsPtr, publicInputsSize))
+        mstore(publicInputsPtr, prevStateRoot)
+        publicInputsPtr := add(publicInputsPtr, 0x20)
+        mstore(publicInputsPtr, newStateRoot)
+        publicInputsPtr := add(publicInputsPtr, 0x20)
+        mstore(publicInputsPtr, withdrawTrieRoot)
+        publicInputsPtr := add(publicInputsPtr, 0x20)
+      }
+    }
+
+    uint64 numTransactionsInBatch;
+    BlockContext memory _block;
+    // 2. append block information to public inputs.
+    for (uint256 i = 0; i < batch.blocks.length; i++) {
+      // validate blocks, we won't check first block against previous batch.
+      {
+        BlockContext memory _currentBlock = batch.blocks[i];
+        if (i > 0) {
+          require(_block.blockHash == _currentBlock.parentHash, "Parent hash mismatch");
+          require(_block.blockNumber + 1 == _currentBlock.blockNumber, "Block number mismatch");
+        }
+        _block = _currentBlock;
+      }
+
+      // append blockHash and parentHash to public inputs
+      {
+        bytes32 blockHash = _block.blockHash;
+        bytes32 parentHash = _block.parentHash;
+        assembly {
+          mstore(publicInputsPtr, blockHash)
+          publicInputsPtr := add(publicInputsPtr, 0x20)
+          mstore(publicInputsPtr, parentHash)
+          publicInputsPtr := add(publicInputsPtr, 0x20)
+        }
+      }
+      // append blockNumber and blockTimestamp to public inputs
+      {
+        uint256 blockNumber = _block.blockNumber;
+        uint256 blockTimestamp = _block.timestamp;
+        assembly {
+          mstore(publicInputsPtr, shl(192, blockNumber))
+          publicInputsPtr := add(publicInputsPtr, 0x8)
+          mstore(publicInputsPtr, shl(192, blockTimestamp))
+          publicInputsPtr := add(publicInputsPtr, 0x8)
+        }
+      }
+      // append baseFee to public inputs
+      {
+        uint256 baseFee = _block.baseFee;
+        assembly {
+          mstore(publicInputsPtr, baseFee)
+          publicInputsPtr := add(publicInputsPtr, 0x20)
+        }
+      }
+      uint64 numTransactionsInBlock = _block.numTransactions;
+      // gasLimit, numTransactions and numL1Messages to public inputs
+      {
+        uint256 gasLimit = _block.gasLimit;
+        uint256 numL1MessagesInBlock = _block.numL1Messages;
+        assembly {
+          mstore(publicInputsPtr, shl(192, gasLimit))
+          publicInputsPtr := add(publicInputsPtr, 0x8)
+          mstore(publicInputsPtr, shl(240, numTransactionsInBlock))
+          publicInputsPtr := add(publicInputsPtr, 0x2)
+          mstore(publicInputsPtr, shl(240, numL1MessagesInBlock))
+          publicInputsPtr := add(publicInputsPtr, 0x2)
+        }
+      }
+      numTransactionsInBatch += numTransactionsInBlock;
+    }
+    require(numTransactionsInBatch <= maxNumTxInBatch, "Too many transactions in batch");
+
+    // 3. append transaction hash to public inputs.
+    uint256 _l2TxnPtr;
+    {
+      bytes memory l2Transactions = batch.l2Transactions;
+      assembly {
+        _l2TxnPtr := add(l2Transactions, 0x20)
+      }
+    }
+    for (uint256 i = 0; i < batch.blocks.length; i++) {
+      uint256 numL1MessagesInBlock = batch.blocks[i].numL1Messages;
+      require(numL1MessagesInBlock == 0);
+      uint256 numTransactionsInBlock = batch.blocks[i].numTransactions;
+      for (uint256 j = numL1MessagesInBlock; j < numTransactionsInBlock; ++j) {
+        bytes32 hash;
+        assembly {
+          let txPayloadLength := shr(224, mload(_l2TxnPtr))
+          _l2TxnPtr := add(_l2TxnPtr, 4)
+          _l2TxnPtr := add(_l2TxnPtr, txPayloadLength)
+          hash := keccak256(sub(_l2TxnPtr, txPayloadLength), txPayloadLength)
+          mstore(publicInputsPtr, hash)
+          publicInputsPtr := add(publicInputsPtr, 0x20)
+        }
+      }
+    }
+
+    // 4. append padding transaction to public inputs.
+    bytes32 txHashPadding = paddingTxHash;
+    for (uint256 i = numTransactionsInBatch; i < maxNumTxInBatch; i++) {
+      assembly {
+        mstore(publicInputsPtr, txHashPadding)
+        publicInputsPtr := add(publicInputsPtr, 0x20)
+      }
+    }
+
+    // 5. compute public input hash
+    bytes32 publicInputHash;
+    {
+      uint256 publicInputsSize = 32 * 3 + batch.blocks.length * 124 + 32 * maxNumTxInBatch;
+      assembly {
+        publicInputHash := keccak256(sub(publicInputsPtr, publicInputsSize), publicInputsSize)
+      }
+    }
+
+    return publicInputHash;
+  }
+}

bridge/mock_bridge/MockBridgeL2.sol

@@ -2,26 +2,56 @@
 pragma solidity ^0.8.0;
 
 contract MockBridgeL2 {
+  /******************************
+   * Events from L2MessageQueue *
+   ******************************/
+
+  /// @notice Emitted when a new message is added to the merkle tree.
+  /// @param index The index of the corresponding message.
+  /// @param messageHash The hash of the corresponding message.
+  event AppendMessage(uint256 index, bytes32 messageHash);
+
+  /********************************
+   * Events from L1BlockContainer *
+   ********************************/
+
+  /// @notice Emitted when a block is imported.
+  /// @param blockHash The hash of the imported block.
+  /// @param blockHeight The height of the imported block.
+  /// @param blockTimestamp The timestamp of the imported block.
+  /// @param baseFee The base fee of the imported block.
+  /// @param stateRoot The state root of the imported block.
+  event ImportBlock(
+    bytes32 indexed blockHash,
+    uint256 blockHeight,
+    uint256 blockTimestamp,
+    uint256 baseFee,
+    bytes32 stateRoot
+  );
+
   /*********************************
    * Events from L2ScrollMessenger *
    *********************************/
 
+  /// @notice Emitted when a cross domain message is sent.
+  /// @param sender The address of the sender who initiates the message.
+  /// @param target The address of target contract to call.
+  /// @param value The amount of value passed to the target contract.
+  /// @param messageNonce The nonce of the message.
+  /// @param gasLimit The optional gas limit passed to L1 or L2.
+  /// @param message The calldata passed to the target contract.
   event SentMessage(
+    address indexed sender,
     address indexed target,
-    address sender,
     uint256 value,
-    uint256 fee,
-    uint256 deadline,
-    bytes message,
     uint256 messageNonce,
-    uint256 gasLimit
+    uint256 gasLimit,
+    bytes message
   );
 
-  event MessageDropped(bytes32 indexed msgHash);
-  
-  event RelayedMessage(bytes32 indexed msgHash);
-  
-  event FailedRelayedMessage(bytes32 indexed msgHash);
+  /// @notice Emitted when a cross domain message is relayed successfully.
+  /// @param messageHash The hash of the message.
+  event RelayedMessage(bytes32 indexed messageHash);
 
   /*************
    * Variables *
@@ -30,38 +60,70 @@ contract MockBridgeL2 {
   /// @notice Message nonce, used to avoid relay attack.
   uint256 public messageNonce;
 
+  /***********************************
+   * Functions from L1GasPriceOracle *
+   ***********************************/
+
+  function setL1BaseFee(uint256) external {
+  }
+
   /************************************
    * Functions from L2ScrollMessenger *
    ************************************/
 
   function sendMessage(
     address _to,
-    uint256 _fee,
+    uint256 _value,
     bytes memory _message,
     uint256 _gasLimit
   ) external payable {
-    // solhint-disable-next-line not-rely-on-time
-    uint256 _deadline = block.timestamp + 1 days;
-    uint256 _nonce = messageNonce;
-    uint256 _value;
-    unchecked {
-      _value = msg.value - _fee;
-    }
-    bytes32 _msghash = keccak256(abi.encodePacked(msg.sender, _to, _value, _fee, _deadline, _nonce, _message));
-    emit SentMessage(_to, msg.sender, _value, _fee, _deadline, _message, _nonce, _gasLimit);
-    messageNonce = _nonce + 1;
+    bytes memory _xDomainCalldata = _encodeXDomainCalldata(msg.sender, _to, _value, messageNonce, _message);
+    bytes32 _xDomainCalldataHash = keccak256(_xDomainCalldata);
+
+    emit AppendMessage(messageNonce, _xDomainCalldataHash);
+    emit SentMessage(msg.sender, _to, _value, messageNonce, _gasLimit, _message);
+
+    messageNonce += 1;
   }
 
-  function relayMessageWithProof(
+  function relayMessage(
     address _from,
     address _to,
     uint256 _value,
-    uint256 _fee,
-    uint256 _deadline,
     uint256 _nonce,
-    bytes memory _message
+    bytes calldata _message
   ) external {
-    bytes32 _msghash = keccak256(abi.encodePacked(_from, _to, _value, _fee, _deadline, _nonce, _message));
-    emit RelayedMessage(_msghash);
+    bytes memory _xDomainCalldata = _encodeXDomainCalldata(_from, _to, _value, _nonce, _message);
+    bytes32 _xDomainCalldataHash = keccak256(_xDomainCalldata);
+    emit RelayedMessage(_xDomainCalldataHash);
+  }
+
+  /**********************
+   * Internal Functions *
+   **********************/
+
+  /// @dev Internal function to generate the correct cross domain calldata for a message.
+  /// @param _sender Message sender address.
+  /// @param _target Target contract address.
+  /// @param _value The amount of ETH pass to the target.
+  /// @param _messageNonce Nonce for the provided message.
+  /// @param _message Message to send to the target.
+  /// @return ABI encoded cross domain calldata.
+  function _encodeXDomainCalldata(
+    address _sender,
+    address _target,
+    uint256 _value,
+    uint256 _messageNonce,
+    bytes memory _message
+  ) internal pure returns (bytes memory) {
+    return
+      abi.encodeWithSignature(
+        "relayMessage(address,address,uint256,uint256,bytes)",
+        _sender,
+        _target,
+        _value,
+        _messageNonce,
+        _message
+      );
   }
 }

bridge/relayer/l1_relayer.go

@@ -0,0 +1,248 @@
+package relayer
+
+import (
+	"context"
+	"errors"
+	"math/big"
+
+	// not sure if this will make problems when relay with l1geth
+
+	"github.com/scroll-tech/go-ethereum/accounts/abi"
+	"github.com/scroll-tech/go-ethereum/common"
+	"github.com/scroll-tech/go-ethereum/crypto"
+	"github.com/scroll-tech/go-ethereum/log"
+	geth_metrics "github.com/scroll-tech/go-ethereum/metrics"
+
+	"scroll-tech/common/types"
+
+	"scroll-tech/database"
+
+	"scroll-tech/common/metrics"
+
+	bridge_abi "scroll-tech/bridge/abi"
+	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/sender"
+)
+
+var (
+	bridgeL1MsgsRelayedTotalCounter          = geth_metrics.NewRegisteredCounter("bridge/l1/msgs/relayed/total", metrics.ScrollRegistry)
+	bridgeL1MsgsRelayedConfirmedTotalCounter = geth_metrics.NewRegisteredCounter("bridge/l1/msgs/relayed/confirmed/total", metrics.ScrollRegistry)
+)
+
+// Layer1Relayer is responsible for
+//  1. fetch pending L1Message from db
+//  2. relay pending message to layer 2 node
+//
+// Actions are triggered by new head from layer 1 geth node.
+// @todo It's better to be triggered by watcher.
+type Layer1Relayer struct {
+	ctx context.Context
+
+	db  database.OrmFactory
+	cfg *config.RelayerConfig
+
+	// channel used to communicate with transaction sender
+	messageSender  *sender.Sender
+	l2MessengerABI *abi.ABI
+
+	gasOracleSender *sender.Sender
+	l1GasOracleABI  *abi.ABI
+
+	minGasLimitForMessageRelay uint64
+
+	lastGasPrice uint64
+	minGasPrice  uint64
+	gasPriceDiff uint64
+}
+
+// NewLayer1Relayer will return a new instance of Layer1RelayerClient
+func NewLayer1Relayer(ctx context.Context, db database.OrmFactory, cfg *config.RelayerConfig) (*Layer1Relayer, error) {
+	messageSender, err := sender.NewSender(ctx, cfg.SenderConfig, cfg.MessageSenderPrivateKeys)
+	if err != nil {
+		addr := crypto.PubkeyToAddress(cfg.MessageSenderPrivateKeys[0].PublicKey)
+		log.Error("new MessageSender failed", "main address", addr.String(), "err", err)
+		return nil, err
+	}
+
+	// @todo make sure only one sender is available
+	gasOracleSender, err := sender.NewSender(ctx, cfg.SenderConfig, cfg.GasOracleSenderPrivateKeys)
+	if err != nil {
+		addr := crypto.PubkeyToAddress(cfg.GasOracleSenderPrivateKeys[0].PublicKey)
+		log.Error("new GasOracleSender failed", "main address", addr.String(), "err", err)
+		return nil, err
+	}
+
+	var minGasPrice uint64
+	var gasPriceDiff uint64
+	if cfg.GasOracleConfig != nil {
+		minGasPrice = cfg.GasOracleConfig.MinGasPrice
+		gasPriceDiff = cfg.GasOracleConfig.GasPriceDiff
+	} else {
+		minGasPrice = 0
+		gasPriceDiff = defaultGasPriceDiff
+	}
+
+	minGasLimitForMessageRelay := uint64(defaultL1MessageRelayMinGasLimit)
+	if cfg.MessageRelayMinGasLimit != 0 {
+		minGasLimitForMessageRelay = cfg.MessageRelayMinGasLimit
+	}
+
+	l1Relayer := &Layer1Relayer{
+		ctx: ctx,
+		db:  db,
+
+		messageSender:  messageSender,
+		l2MessengerABI: bridge_abi.L2ScrollMessengerABI,
+
+		gasOracleSender: gasOracleSender,
+		l1GasOracleABI:  bridge_abi.L1GasPriceOracleABI,
+
+		minGasLimitForMessageRelay: minGasLimitForMessageRelay,
+
+		minGasPrice:  minGasPrice,
+		gasPriceDiff: gasPriceDiff,
+
+		cfg: cfg,
+	}
+
+	go l1Relayer.handleConfirmLoop(ctx)
+	return l1Relayer, nil
+}
+
+// ProcessSavedEvents relays saved un-processed cross-domain transactions to desired blockchain
+func (r *Layer1Relayer) ProcessSavedEvents() {
+	// msgs are sorted by nonce in increasing order
+	msgs, err := r.db.GetL1MessagesByStatus(types.MsgPending, 100)
+	if err != nil {
+		log.Error("Failed to fetch unprocessed L1 messages", "err", err)
+		return
+	}
+
+	if len(msgs) > 0 {
+		log.Info("Processing L1 messages", "count", len(msgs))
+	}
+
+	for _, msg := range msgs {
+		if err = r.processSavedEvent(msg); err != nil {
+			if !errors.Is(err, sender.ErrNoAvailableAccount) && !errors.Is(err, sender.ErrFullPending) {
+				log.Error("failed to process event", "msg.msgHash", msg.MsgHash, "err", err)
+			}
+			return
+		}
+	}
+}
+
+func (r *Layer1Relayer) processSavedEvent(msg *types.L1Message) error {
+	calldata := common.Hex2Bytes(msg.Calldata)
+
+	hash, err := r.messageSender.SendTransaction(msg.MsgHash, &r.cfg.MessengerContractAddress, big.NewInt(0), calldata, r.minGasLimitForMessageRelay)
+	if err != nil && err.Error() == "execution reverted: Message expired" {
+		return r.db.UpdateLayer1Status(r.ctx, msg.MsgHash, types.MsgExpired)
+	}
+	if err != nil && err.Error() == "execution reverted: Message was already successfully executed" {
+		return r.db.UpdateLayer1Status(r.ctx, msg.MsgHash, types.MsgConfirmed)
+	}
+	if err != nil {
+		return err
+	}
+	bridgeL1MsgsRelayedTotalCounter.Inc(1)
+	log.Info("relayMessage to layer2", "msg hash", msg.MsgHash, "tx hash", hash)
+
+	err = r.db.UpdateLayer1StatusAndLayer2Hash(r.ctx, msg.MsgHash, types.MsgSubmitted, hash.String())
+	if err != nil {
+		log.Error("UpdateLayer1StatusAndLayer2Hash failed", "msg.msgHash", msg.MsgHash, "msg.height", msg.Height, "err", err)
+	}
+	return err
+}
+
+// ProcessGasPriceOracle imports gas price to layer2
+func (r *Layer1Relayer) ProcessGasPriceOracle() {
+	latestBlockHeight, err := r.db.GetLatestL1BlockHeight()
+	if err != nil {
+		log.Warn("Failed to fetch latest L1 block height from db", "err", err)
+		return
+	}
+
+	blocks, err := r.db.GetL1BlockInfos(map[string]interface{}{
+		"number": latestBlockHeight,
+	})
+	if err != nil {
+		log.Error("Failed to GetL1BlockInfos from db", "height", latestBlockHeight, "err", err)
+		return
+	}
+	if len(blocks) != 1 {
+		log.Error("Block not exist", "height", latestBlockHeight)
+		return
+	}
+	block := blocks[0]
+
+	if block.GasOracleStatus == types.GasOraclePending {
+		expectedDelta := r.lastGasPrice * r.gasPriceDiff / gasPriceDiffPrecision
+		// last is undefine or (block.BaseFee >= minGasPrice && exceed diff)
+		if r.lastGasPrice == 0 || (block.BaseFee >= r.minGasPrice && (block.BaseFee >= r.lastGasPrice+expectedDelta || block.BaseFee <= r.lastGasPrice-expectedDelta)) {
+			baseFee := big.NewInt(int64(block.BaseFee))
+			data, err := r.l1GasOracleABI.Pack("setL1BaseFee", baseFee)
+			if err != nil {
+				log.Error("Failed to pack setL1BaseFee", "block.Hash", block.Hash, "block.Height", block.Number, "block.BaseFee", block.BaseFee, "err", err)
+				return
+			}
+
+			hash, err := r.gasOracleSender.SendTransaction(block.Hash, &r.cfg.GasPriceOracleContractAddress, big.NewInt(0), data, 0)
+			if err != nil {
+				if !errors.Is(err, sender.ErrNoAvailableAccount) && !errors.Is(err, sender.ErrFullPending) {
+					log.Error("Failed to send setL1BaseFee tx to layer2 ", "block.Hash", block.Hash, "block.Height", block.Number, "err", err)
+				}
+				return
+			}
+
+			err = r.db.UpdateL1GasOracleStatusAndOracleTxHash(r.ctx, block.Hash, types.GasOracleImporting, hash.String())
+			if err != nil {
+				log.Error("UpdateGasOracleStatusAndOracleTxHash failed", "block.Hash", block.Hash, "block.Height", block.Number, "err", err)
+				return
+			}
+			r.lastGasPrice = block.BaseFee
+			log.Info("Update l1 base fee", "txHash", hash.String(), "baseFee", baseFee)
+		}
+	}
+}
+
+func (r *Layer1Relayer) handleConfirmLoop(ctx context.Context) {
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case cfm := <-r.messageSender.ConfirmChan():
+			bridgeL1MsgsRelayedConfirmedTotalCounter.Inc(1)
+			if !cfm.IsSuccessful {
+				err := r.db.UpdateLayer1StatusAndLayer2Hash(r.ctx, cfm.ID, types.MsgRelayFailed, cfm.TxHash.String())
+				if err != nil {
+					log.Warn("UpdateLayer1StatusAndLayer2Hash failed", "err", err)
+				}
+				log.Warn("transaction confirmed but failed in layer2", "confirmation", cfm)
+			} else {
+				// @todo handle db error
+				err := r.db.UpdateLayer1StatusAndLayer2Hash(r.ctx, cfm.ID, types.MsgConfirmed, cfm.TxHash.String())
+				if err != nil {
+					log.Warn("UpdateLayer1StatusAndLayer2Hash failed", "err", err)
+				}
+				log.Info("transaction confirmed in layer2", "confirmation", cfm)
+			}
+		case cfm := <-r.gasOracleSender.ConfirmChan():
+			if !cfm.IsSuccessful {
+				// @discuss: maybe make it pending again?
+				err := r.db.UpdateL1GasOracleStatusAndOracleTxHash(r.ctx, cfm.ID, types.GasOracleFailed, cfm.TxHash.String())
+				if err != nil {
+					log.Warn("UpdateL1GasOracleStatusAndOracleTxHash failed", "err", err)
+				}
+				log.Warn("transaction confirmed but failed in layer2", "confirmation", cfm)
+			} else {
+				// @todo handle db error
+				err := r.db.UpdateL1GasOracleStatusAndOracleTxHash(r.ctx, cfm.ID, types.GasOracleImported, cfm.TxHash.String())
+				if err != nil {
+					log.Warn("UpdateGasOracleStatusAndOracleTxHash failed", "err", err)
+				}
+				log.Info("transaction confirmed in layer2", "confirmation", cfm)
+			}
+		}
+	}
+}

bridge/relayer/l1_relayer_test.go

@@ -1,4 +1,4 @@
-package l1
+package relayer_test
 
 import (
 	"context"
@@ -8,6 +8,8 @@ import (
 
 	"scroll-tech/database/migrate"
 
+	"scroll-tech/bridge/relayer"
+
 	"scroll-tech/database"
 )
 
@@ -19,9 +21,7 @@ func testCreateNewL1Relayer(t *testing.T) {
 	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
 	defer db.Close()
 
-	relayer, err := NewLayer1Relayer(context.Background(), db, cfg.L2Config.RelayerConfig)
+	relayer, err := relayer.NewLayer1Relayer(context.Background(), db, cfg.L2Config.RelayerConfig)
 	assert.NoError(t, err)
-	defer relayer.Stop()
-
-	relayer.Start()
+	assert.NotNil(t, relayer)
 }

bridge/relayer/l2_relayer.go

@@ -0,0 +1,593 @@
+package relayer
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"math/big"
+	"runtime"
+	"sync"
+
+	"github.com/scroll-tech/go-ethereum/accounts/abi"
+	"github.com/scroll-tech/go-ethereum/common"
+	"github.com/scroll-tech/go-ethereum/crypto"
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/scroll-tech/go-ethereum/log"
+	geth_metrics "github.com/scroll-tech/go-ethereum/metrics"
+	"golang.org/x/sync/errgroup"
+	"modernc.org/mathutil"
+
+	"scroll-tech/common/metrics"
+	"scroll-tech/common/types"
+
+	"scroll-tech/database"
+
+	bridge_abi "scroll-tech/bridge/abi"
+	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/sender"
+	"scroll-tech/bridge/utils"
+)
+
+var (
+	bridgeL2MsgsRelayedTotalCounter               = geth_metrics.NewRegisteredCounter("bridge/l2/msgs/relayed/total", metrics.ScrollRegistry)
+	bridgeL2BatchesFinalizedTotalCounter          = geth_metrics.NewRegisteredCounter("bridge/l2/batches/finalized/total", metrics.ScrollRegistry)
+	bridgeL2BatchesCommittedTotalCounter          = geth_metrics.NewRegisteredCounter("bridge/l2/batches/committed/total", metrics.ScrollRegistry)
+	bridgeL2MsgsRelayedConfirmedTotalCounter      = geth_metrics.NewRegisteredCounter("bridge/l2/msgs/relayed/confirmed/total", metrics.ScrollRegistry)
+	bridgeL2BatchesFinalizedConfirmedTotalCounter = geth_metrics.NewRegisteredCounter("bridge/l2/batches/finalized/confirmed/total", metrics.ScrollRegistry)
+	bridgeL2BatchesCommittedConfirmedTotalCounter = geth_metrics.NewRegisteredCounter("bridge/l2/batches/committed/confirmed/total", metrics.ScrollRegistry)
+	bridgeL2BatchesSkippedTotalCounter            = geth_metrics.NewRegisteredCounter("bridge/l2/batches/skipped/total", metrics.ScrollRegistry)
+)
+
+// Layer2Relayer is responsible for
+//  1. Committing and finalizing L2 blocks on L1
+//  2. Relaying messages from L2 to L1
+//
+// Actions are triggered by new head from layer 1 geth node.
+// @todo It's better to be triggered by watcher.
+type Layer2Relayer struct {
+	ctx context.Context
+
+	l2Client *ethclient.Client
+
+	db  database.OrmFactory
+	cfg *config.RelayerConfig
+
+	messageSender  *sender.Sender
+	l1MessengerABI *abi.ABI
+
+	rollupSender *sender.Sender
+	l1RollupABI  *abi.ABI
+
+	gasOracleSender *sender.Sender
+	l2GasOracleABI  *abi.ABI
+
+	minGasLimitForMessageRelay uint64
+
+	lastGasPrice uint64
+	minGasPrice  uint64
+	gasPriceDiff uint64
+
+	// A list of processing message.
+	// key(string): confirmation ID, value(string): layer2 hash.
+	processingMessage sync.Map
+
+	// A list of processing batches commitment.
+	// key(string): confirmation ID, value([]string): batch hashes.
+	processingBatchesCommitment sync.Map
+
+	// A list of processing batch finalization.
+	// key(string): confirmation ID, value(string): batch hash.
+	processingFinalization sync.Map
+}
+
+// NewLayer2Relayer will return a new instance of Layer2RelayerClient
+func NewLayer2Relayer(ctx context.Context, l2Client *ethclient.Client, db database.OrmFactory, cfg *config.RelayerConfig) (*Layer2Relayer, error) {
+	// @todo use different sender for relayer, block commit and proof finalize
+	messageSender, err := sender.NewSender(ctx, cfg.SenderConfig, cfg.MessageSenderPrivateKeys)
+	if err != nil {
+		log.Error("Failed to create messenger sender", "err", err)
+		return nil, err
+	}
+
+	rollupSender, err := sender.NewSender(ctx, cfg.SenderConfig, cfg.RollupSenderPrivateKeys)
+	if err != nil {
+		log.Error("Failed to create rollup sender", "err", err)
+		return nil, err
+	}
+
+	gasOracleSender, err := sender.NewSender(ctx, cfg.SenderConfig, cfg.GasOracleSenderPrivateKeys)
+	if err != nil {
+		log.Error("Failed to create gas oracle sender", "err", err)
+		return nil, err
+	}
+
+	var minGasPrice uint64
+	var gasPriceDiff uint64
+	if cfg.GasOracleConfig != nil {
+		minGasPrice = cfg.GasOracleConfig.MinGasPrice
+		gasPriceDiff = cfg.GasOracleConfig.GasPriceDiff
+	} else {
+		minGasPrice = 0
+		gasPriceDiff = defaultGasPriceDiff
+	}
+
+	minGasLimitForMessageRelay := uint64(defaultL2MessageRelayMinGasLimit)
+	if cfg.MessageRelayMinGasLimit != 0 {
+		minGasLimitForMessageRelay = cfg.MessageRelayMinGasLimit
+	}
+
+	layer2Relayer := &Layer2Relayer{
+		ctx: ctx,
+		db:  db,
+
+		l2Client: l2Client,
+
+		messageSender:  messageSender,
+		l1MessengerABI: bridge_abi.L1ScrollMessengerABI,
+
+		rollupSender: rollupSender,
+		l1RollupABI:  bridge_abi.ScrollChainABI,
+
+		gasOracleSender: gasOracleSender,
+		l2GasOracleABI:  bridge_abi.L2GasPriceOracleABI,
+
+		minGasLimitForMessageRelay: minGasLimitForMessageRelay,
+
+		minGasPrice:  minGasPrice,
+		gasPriceDiff: gasPriceDiff,
+
+		cfg:                         cfg,
+		processingMessage:           sync.Map{},
+		processingBatchesCommitment: sync.Map{},
+		processingFinalization:      sync.Map{},
+	}
+	go layer2Relayer.handleConfirmLoop(ctx)
+	return layer2Relayer, nil
+}
+
+const processMsgLimit = 100
+
+// ProcessSavedEvents relays saved un-processed cross-domain transactions to desired blockchain
+func (r *Layer2Relayer) ProcessSavedEvents() {
+	batch, err := r.db.GetLatestFinalizedBatch()
+	if err != nil {
+		log.Error("GetLatestFinalizedBatch failed", "err", err)
+		return
+	}
+
+	// msgs are sorted by nonce in increasing order
+	msgs, err := r.db.GetL2Messages(
+		map[string]interface{}{"status": types.MsgPending},
+		fmt.Sprintf("AND height<=%d", batch.EndBlockNumber),
+		fmt.Sprintf("ORDER BY nonce ASC LIMIT %d", processMsgLimit),
+	)
+
+	if err != nil {
+		log.Error("Failed to fetch unprocessed L2 messages", "err", err)
+		return
+	}
+
+	// process messages in batches
+	batchSize := mathutil.Min((runtime.GOMAXPROCS(0)+1)/2, r.messageSender.NumberOfAccounts())
+	for size := 0; len(msgs) > 0; msgs = msgs[size:] {
+		if size = len(msgs); size > batchSize {
+			size = batchSize
+		}
+		var g errgroup.Group
+		for _, msg := range msgs[:size] {
+			msg := msg
+			g.Go(func() error {
+				return r.processSavedEvent(msg)
+			})
+		}
+		if err := g.Wait(); err != nil {
+			if !errors.Is(err, sender.ErrNoAvailableAccount) && !errors.Is(err, sender.ErrFullPending) {
+				log.Error("failed to process l2 saved event", "err", err)
+			}
+			return
+		}
+	}
+}
+
+func (r *Layer2Relayer) processSavedEvent(msg *types.L2Message) error {
+	// @todo fetch merkle proof from l2geth
+	log.Info("Processing L2 Message", "msg.nonce", msg.Nonce, "msg.height", msg.Height)
+
+	// Get the block info that contains the message
+	blockInfos, err := r.db.GetL2BlockInfos(map[string]interface{}{"number": msg.Height})
+	if err != nil {
+		log.Error("Failed to GetL2BlockInfos from DB", "number", msg.Height)
+	}
+	blockInfo := blockInfos[0]
+	if !blockInfo.BatchHash.Valid {
+		log.Error("Block has not been batched yet", "number", blockInfo.Number, "msg.nonce", msg.Nonce)
+		return nil
+	}
+
+	// TODO: rebuild the withdraw trie to generate the merkle proof
+	proof := bridge_abi.IL1ScrollMessengerL2MessageProof{
+		BatchHash:   common.HexToHash(blockInfo.BatchHash.String),
+		MerkleProof: make([]byte, 0),
+	}
+	from := common.HexToAddress(msg.Sender)
+	target := common.HexToAddress(msg.Target)
+	value, ok := big.NewInt(0).SetString(msg.Value, 10)
+	if !ok {
+		// @todo maybe panic?
+		log.Error("Failed to parse message value", "msg.nonce", msg.Nonce, "msg.height", msg.Height)
+		// TODO: need to skip this message by changing its status to MsgError
+	}
+	msgNonce := big.NewInt(int64(msg.Nonce))
+	calldata := common.Hex2Bytes(msg.Calldata)
+	data, err := r.l1MessengerABI.Pack("relayMessageWithProof", from, target, value, msgNonce, calldata, proof)
+	if err != nil {
+		log.Error("Failed to pack relayMessageWithProof", "msg.nonce", msg.Nonce, "err", err)
+		// TODO: need to skip this message by changing its status to MsgError
+		return err
+	}
+
+	hash, err := r.messageSender.SendTransaction(msg.MsgHash, &r.cfg.MessengerContractAddress, big.NewInt(0), data, r.minGasLimitForMessageRelay)
+	if err != nil && err.Error() == "execution reverted: Message expired" {
+		return r.db.UpdateLayer2Status(r.ctx, msg.MsgHash, types.MsgExpired)
+	}
+	if err != nil && err.Error() == "execution reverted: Message was already successfully executed" {
+		return r.db.UpdateLayer2Status(r.ctx, msg.MsgHash, types.MsgConfirmed)
+	}
+	if err != nil {
+		if !errors.Is(err, sender.ErrNoAvailableAccount) && !errors.Is(err, sender.ErrFullPending) {
+			log.Error("Failed to send relayMessageWithProof tx to layer1 ", "msg.height", msg.Height, "msg.MsgHash", msg.MsgHash, "err", err)
+		}
+		return err
+	}
+	bridgeL2MsgsRelayedTotalCounter.Inc(1)
+	log.Info("relayMessageWithProof to layer1", "msgHash", msg.MsgHash, "txhash", hash.String())
+
+	// save status in db
+	// @todo handle db error
+	err = r.db.UpdateLayer2StatusAndLayer1Hash(r.ctx, msg.MsgHash, types.MsgSubmitted, hash.String())
+	if err != nil {
+		log.Error("UpdateLayer2StatusAndLayer1Hash failed", "msgHash", msg.MsgHash, "err", err)
+		return err
+	}
+	r.processingMessage.Store(msg.MsgHash, msg.MsgHash)
+	return nil
+}
+
+// ProcessGasPriceOracle imports gas price to layer1
+func (r *Layer2Relayer) ProcessGasPriceOracle() {
+	batch, err := r.db.GetLatestBatch()
+	if err != nil {
+		log.Error("Failed to GetLatestBatch", "err", err)
+		return
+	}
+
+	if batch.OracleStatus == types.GasOraclePending {
+		suggestGasPrice, err := r.l2Client.SuggestGasPrice(r.ctx)
+		if err != nil {
+			log.Error("Failed to fetch SuggestGasPrice from l2geth", "err", err)
+			return
+		}
+		suggestGasPriceUint64 := uint64(suggestGasPrice.Int64())
+		expectedDelta := r.lastGasPrice * r.gasPriceDiff / gasPriceDiffPrecision
+
+		// last is undefine or (suggestGasPriceUint64 >= minGasPrice && exceed diff)
+		if r.lastGasPrice == 0 || (suggestGasPriceUint64 >= r.minGasPrice && (suggestGasPriceUint64 >= r.lastGasPrice+expectedDelta || suggestGasPriceUint64 <= r.lastGasPrice-expectedDelta)) {
+			data, err := r.l2GasOracleABI.Pack("setL2BaseFee", suggestGasPrice)
+			if err != nil {
+				log.Error("Failed to pack setL2BaseFee", "batch.Hash", batch.Hash, "GasPrice", suggestGasPrice.Uint64(), "err", err)
+				return
+			}
+
+			hash, err := r.gasOracleSender.SendTransaction(batch.Hash, &r.cfg.GasPriceOracleContractAddress, big.NewInt(0), data, 0)
+			if err != nil {
+				if !errors.Is(err, sender.ErrNoAvailableAccount) && !errors.Is(err, sender.ErrFullPending) {
+					log.Error("Failed to send setL2BaseFee tx to layer2 ", "batch.Hash", batch.Hash, "err", err)
+				}
+				return
+			}
+
+			err = r.db.UpdateL2GasOracleStatusAndOracleTxHash(r.ctx, batch.Hash, types.GasOracleImporting, hash.String())
+			if err != nil {
+				log.Error("UpdateGasOracleStatusAndOracleTxHash failed", "batch.Hash", batch.Hash, "err", err)
+				return
+			}
+			r.lastGasPrice = suggestGasPriceUint64
+			log.Info("Update l2 gas price", "txHash", hash.String(), "GasPrice", suggestGasPrice)
+		}
+	}
+}
+
+// SendCommitTx sends commitBatches tx to L1.
+func (r *Layer2Relayer) SendCommitTx(batchData []*types.BatchData) error {
+	if len(batchData) == 0 {
+		log.Error("SendCommitTx receives empty batch")
+		return nil
+	}
+
+	// pack calldata
+	commitBatches := make([]bridge_abi.IScrollChainBatch, len(batchData))
+	for i, batch := range batchData {
+		commitBatches[i] = batch.Batch
+	}
+	calldata, err := r.l1RollupABI.Pack("commitBatches", commitBatches)
+	if err != nil {
+		log.Error("Failed to pack commitBatches",
+			"error", err,
+			"start_batch_index", commitBatches[0].BatchIndex,
+			"end_batch_index", commitBatches[len(commitBatches)-1].BatchIndex)
+		return err
+	}
+
+	// generate a unique txID and send transaction
+	var bytes []byte
+	for _, batch := range batchData {
+		bytes = append(bytes, batch.Hash().Bytes()...)
+	}
+	txID := crypto.Keccak256Hash(bytes).String()
+	txHash, err := r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), calldata, 0)
+	if err != nil {
+		if !errors.Is(err, sender.ErrNoAvailableAccount) && !errors.Is(err, sender.ErrFullPending) {
+			log.Error("Failed to send commitBatches tx to layer1 ", "err", err)
+		}
+		return err
+	}
+	bridgeL2BatchesCommittedTotalCounter.Inc(int64(len(commitBatches)))
+	log.Info("Sent the commitBatches tx to layer1",
+		"tx_hash", txHash.Hex(),
+		"start_batch_index", commitBatches[0].BatchIndex,
+		"end_batch_index", commitBatches[len(commitBatches)-1].BatchIndex)
+
+	// record and sync with db, @todo handle db error
+	batchHashes := make([]string, len(batchData))
+	for i, batch := range batchData {
+		batchHashes[i] = batch.Hash().Hex()
+		err = r.db.UpdateCommitTxHashAndRollupStatus(r.ctx, batchHashes[i], txHash.String(), types.RollupCommitting)
+		if err != nil {
+			log.Error("UpdateCommitTxHashAndRollupStatus failed", "hash", batchHashes[i], "index", batch.Batch.BatchIndex, "err", err)
+		}
+	}
+	r.processingBatchesCommitment.Store(txID, batchHashes)
+	return nil
+}
+
+// ProcessCommittedBatches submit proof to layer 1 rollup contract
+func (r *Layer2Relayer) ProcessCommittedBatches() {
+	// set skipped batches in a single db operation
+	if count, err := r.db.UpdateSkippedBatches(); err != nil {
+		log.Error("UpdateSkippedBatches failed", "err", err)
+		// continue anyway
+	} else if count > 0 {
+		bridgeL2BatchesSkippedTotalCounter.Inc(count)
+		log.Info("Skipping batches", "count", count)
+	}
+
+	// batches are sorted by batch index in increasing order
+	batchHashes, err := r.db.GetCommittedBatches(1)
+	if err != nil {
+		log.Error("Failed to fetch committed L2 batches", "err", err)
+		return
+	}
+	if len(batchHashes) == 0 {
+		return
+	}
+	hash := batchHashes[0]
+	// @todo add support to relay multiple batches
+
+	batches, err := r.db.GetBlockBatches(map[string]interface{}{"hash": hash}, "LIMIT 1")
+	if err != nil {
+		log.Error("Failed to fetch committed L2 batch", "hash", hash, "err", err)
+		return
+	}
+	if len(batches) == 0 {
+		log.Error("Unexpected result for GetBlockBatches", "hash", hash, "len", 0)
+		return
+	}
+
+	batch := batches[0]
+	status := batch.ProvingStatus
+
+	switch status {
+	case types.ProvingTaskUnassigned, types.ProvingTaskAssigned:
+		// The proof for this block is not ready yet.
+		return
+
+	case types.ProvingTaskProved:
+		// It's an intermediate state. The roller manager received the proof but has not verified
+		// the proof yet. We don't roll up the proof until it's verified.
+		return
+
+	case types.ProvingTaskFailed, types.ProvingTaskSkipped:
+		// note: this is covered by UpdateSkippedBatches, but we keep it for completeness's sake
+
+		if err = r.db.UpdateRollupStatus(r.ctx, hash, types.RollupFinalizationSkipped); err != nil {
+			log.Warn("UpdateRollupStatus failed", "hash", hash, "err", err)
+		}
+
+	case types.ProvingTaskVerified:
+		log.Info("Start to roll up zk proof", "hash", hash)
+		success := false
+
+		previousBatch, err := r.db.GetLatestFinalizingOrFinalizedBatch()
+
+		// skip submitting proof
+		if err == nil && uint64(batch.CreatedAt.Sub(*previousBatch.CreatedAt).Seconds()) < r.cfg.FinalizeBatchIntervalSec {
+			log.Info(
+				"Not enough time passed, skipping",
+				"hash", hash,
+				"createdAt", batch.CreatedAt,
+				"lastFinalizingHash", previousBatch.Hash,
+				"lastFinalizingStatus", previousBatch.RollupStatus,
+				"lastFinalizingCreatedAt", previousBatch.CreatedAt,
+			)
+
+			if err = r.db.UpdateRollupStatus(r.ctx, hash, types.RollupFinalizationSkipped); err != nil {
+				log.Warn("UpdateRollupStatus failed", "hash", hash, "err", err)
+			} else {
+				success = true
+			}
+
+			return
+		}
+
+		// handle unexpected db error
+		if err != nil && err.Error() != "sql: no rows in result set" {
+			log.Error("Failed to get latest finalized batch", "err", err)
+			return
+		}
+
+		defer func() {
+			// TODO: need to revisit this and have a more fine-grained error handling
+			if !success {
+				log.Info("Failed to upload the proof, change rollup status to FinalizationSkipped", "hash", hash)
+				if err = r.db.UpdateRollupStatus(r.ctx, hash, types.RollupFinalizationSkipped); err != nil {
+					log.Warn("UpdateRollupStatus failed", "hash", hash, "err", err)
+				}
+			}
+		}()
+
+		proofBuffer, instanceBuffer, err := r.db.GetVerifiedProofAndInstanceByHash(hash)
+		if err != nil {
+			log.Warn("fetch get proof by hash failed", "hash", hash, "err", err)
+			return
+		}
+		if proofBuffer == nil || instanceBuffer == nil {
+			log.Warn("proof or instance not ready", "hash", hash)
+			return
+		}
+		if len(proofBuffer)%32 != 0 {
+			log.Error("proof buffer has wrong length", "hash", hash, "length", len(proofBuffer))
+			return
+		}
+		if len(instanceBuffer)%32 != 0 {
+			log.Warn("instance buffer has wrong length", "hash", hash, "length", len(instanceBuffer))
+			return
+		}
+
+		proof := utils.BufferToUint256Le(proofBuffer)
+		instance := utils.BufferToUint256Le(instanceBuffer)
+		data, err := r.l1RollupABI.Pack("finalizeBatchWithProof", common.HexToHash(hash), proof, instance)
+		if err != nil {
+			log.Error("Pack finalizeBatchWithProof failed", "err", err)
+			return
+		}
+
+		txID := hash + "-finalize"
+		// add suffix `-finalize` to avoid duplication with commit tx in unit tests
+		txHash, err := r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), data, 0)
+		finalizeTxHash := &txHash
+		if err != nil {
+			if !errors.Is(err, sender.ErrNoAvailableAccount) && !errors.Is(err, sender.ErrFullPending) {
+				log.Error("finalizeBatchWithProof in layer1 failed", "hash", hash, "err", err)
+			}
+			return
+		}
+		bridgeL2BatchesFinalizedTotalCounter.Inc(1)
+		log.Info("finalizeBatchWithProof in layer1", "batch_hash", hash, "tx_hash", hash)
+
+		// record and sync with db, @todo handle db error
+		err = r.db.UpdateFinalizeTxHashAndRollupStatus(r.ctx, hash, finalizeTxHash.String(), types.RollupFinalizing)
+		if err != nil {
+			log.Warn("UpdateFinalizeTxHashAndRollupStatus failed", "batch_hash", hash, "err", err)
+		}
+		success = true
+		r.processingFinalization.Store(txID, hash)
+
+	default:
+		log.Error("encounter unreachable case in ProcessCommittedBatches",
+			"block_status", status,
+		)
+	}
+}
+
+func (r *Layer2Relayer) handleConfirmation(confirmation *sender.Confirmation) {
+	transactionType := "Unknown"
+	// check whether it is message relay transaction
+	if msgHash, ok := r.processingMessage.Load(confirmation.ID); ok {
+		transactionType = "MessageRelay"
+		var status types.MsgStatus
+		if confirmation.IsSuccessful {
+			status = types.MsgConfirmed
+		} else {
+			status = types.MsgRelayFailed
+			log.Warn("transaction confirmed but failed in layer1", "confirmation", confirmation)
+		}
+		// @todo handle db error
+		err := r.db.UpdateLayer2StatusAndLayer1Hash(r.ctx, msgHash.(string), status, confirmation.TxHash.String())
+		if err != nil {
+			log.Warn("UpdateLayer2StatusAndLayer1Hash failed", "msgHash", msgHash.(string), "err", err)
+		}
+		bridgeL2MsgsRelayedConfirmedTotalCounter.Inc(1)
+		r.processingMessage.Delete(confirmation.ID)
+	}
+
+	// check whether it is CommitBatches transaction
+	if batchBatches, ok := r.processingBatchesCommitment.Load(confirmation.ID); ok {
+		transactionType = "BatchesCommitment"
+		batchHashes := batchBatches.([]string)
+		var status types.RollupStatus
+		if confirmation.IsSuccessful {
+			status = types.RollupCommitted
+		} else {
+			status = types.RollupCommitFailed
+			log.Warn("transaction confirmed but failed in layer1", "confirmation", confirmation)
+		}
+		for _, batchHash := range batchHashes {
+			// @todo handle db error
+			err := r.db.UpdateCommitTxHashAndRollupStatus(r.ctx, batchHash, confirmation.TxHash.String(), status)
+			if err != nil {
+				log.Warn("UpdateCommitTxHashAndRollupStatus failed", "batch_hash", batchHash, "err", err)
+			}
+		}
+		bridgeL2BatchesCommittedConfirmedTotalCounter.Inc(int64(len(batchHashes)))
+		r.processingBatchesCommitment.Delete(confirmation.ID)
+	}
+
+	// check whether it is proof finalization transaction
+	if batchHash, ok := r.processingFinalization.Load(confirmation.ID); ok {
+		transactionType = "ProofFinalization"
+		var status types.RollupStatus
+		if confirmation.IsSuccessful {
+			status = types.RollupFinalized
+		} else {
+			status = types.RollupFinalizeFailed
+			log.Warn("transaction confirmed but failed in layer1", "confirmation", confirmation)
+		}
+		// @todo handle db error
+		err := r.db.UpdateFinalizeTxHashAndRollupStatus(r.ctx, batchHash.(string), confirmation.TxHash.String(), status)
+		if err != nil {
+			log.Warn("UpdateFinalizeTxHashAndRollupStatus failed", "batch_hash", batchHash.(string), "err", err)
+		}
+		bridgeL2BatchesFinalizedConfirmedTotalCounter.Inc(1)
+		r.processingFinalization.Delete(confirmation.ID)
+	}
+	log.Info("transaction confirmed in layer1", "type", transactionType, "confirmation", confirmation)
+}
+
+func (r *Layer2Relayer) handleConfirmLoop(ctx context.Context) {
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case confirmation := <-r.messageSender.ConfirmChan():
+			r.handleConfirmation(confirmation)
+		case confirmation := <-r.rollupSender.ConfirmChan():
+			r.handleConfirmation(confirmation)
+		case cfm := <-r.gasOracleSender.ConfirmChan():
+			if !cfm.IsSuccessful {
+				// @discuss: maybe make it pending again?
+				err := r.db.UpdateL2GasOracleStatusAndOracleTxHash(r.ctx, cfm.ID, types.GasOracleFailed, cfm.TxHash.String())
+				if err != nil {
+					log.Warn("UpdateL2GasOracleStatusAndOracleTxHash failed", "err", err)
+				}
+				log.Warn("transaction confirmed but failed in layer1", "confirmation", cfm)
+			} else {
+				// @todo handle db error
+				err := r.db.UpdateL2GasOracleStatusAndOracleTxHash(r.ctx, cfm.ID, types.GasOracleImported, cfm.TxHash.String())
+				if err != nil {
+					log.Warn("UpdateL2GasOracleStatusAndOracleTxHash failed", "err", err)
+				}
+				log.Info("transaction confirmed in layer1", "confirmation", cfm)
+			}
+		}
+	}
+}

bridge/relayer/l2_relayer_test.go

@@ -0,0 +1,223 @@
+package relayer_test
+
+import (
+	"context"
+	"encoding/json"
+	"math/big"
+	"os"
+	"strconv"
+	"testing"
+
+	"github.com/scroll-tech/go-ethereum/common"
+	geth_types "github.com/scroll-tech/go-ethereum/core/types"
+	"github.com/stretchr/testify/assert"
+
+	"scroll-tech/common/types"
+
+	"scroll-tech/bridge/relayer"
+
+	"scroll-tech/database"
+	"scroll-tech/database/migrate"
+)
+
+var (
+	templateL2Message = []*types.L2Message{
+		{
+			Nonce:      1,
+			Height:     1,
+			Sender:     "0x596a746661dbed76a84556111c2872249b070e15",
+			Value:      "100",
+			Target:     "0x2c73620b223808297ea734d946813f0dd78eb8f7",
+			Calldata:   "testdata",
+			Layer2Hash: "hash0",
+		},
+	}
+)
+
+func testCreateNewRelayer(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	defer db.Close()
+
+	relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Cli, db, cfg.L2Config.RelayerConfig)
+	assert.NoError(t, err)
+	assert.NotNil(t, relayer)
+}
+
+func testL2RelayerProcessSaveEvents(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	defer db.Close()
+
+	l2Cfg := cfg.L2Config
+	relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Cli, db, l2Cfg.RelayerConfig)
+	assert.NoError(t, err)
+
+	err = db.SaveL2Messages(context.Background(), templateL2Message)
+	assert.NoError(t, err)
+
+	traces := []*types.WrappedBlock{
+		{
+			Header: &geth_types.Header{
+				Number: big.NewInt(int64(templateL2Message[0].Height)),
+			},
+			Transactions:     nil,
+			WithdrawTrieRoot: common.Hash{},
+		},
+		{
+			Header: &geth_types.Header{
+				Number: big.NewInt(int64(templateL2Message[0].Height + 1)),
+			},
+			Transactions:     nil,
+			WithdrawTrieRoot: common.Hash{},
+		},
+	}
+	assert.NoError(t, db.InsertWrappedBlocks(traces))
+
+	parentBatch1 := &types.BlockBatch{
+		Index:     0,
+		Hash:      common.Hash{}.String(),
+		StateRoot: common.Hash{}.String(),
+	}
+	batchData1 := types.NewBatchData(parentBatch1, []*types.WrappedBlock{wrappedBlock1}, nil)
+	dbTx, err := db.Beginx()
+	assert.NoError(t, err)
+	assert.NoError(t, db.NewBatchInDBTx(dbTx, batchData1))
+	batchHash := batchData1.Hash().Hex()
+	assert.NoError(t, db.SetBatchHashForL2BlocksInDBTx(dbTx, []uint64{1}, batchHash))
+	assert.NoError(t, dbTx.Commit())
+
+	err = db.UpdateRollupStatus(context.Background(), batchHash, types.RollupFinalized)
+	assert.NoError(t, err)
+
+	relayer.ProcessSavedEvents()
+
+	msg, err := db.GetL2MessageByNonce(templateL2Message[0].Nonce)
+	assert.NoError(t, err)
+	assert.Equal(t, types.MsgSubmitted, msg.Status)
+}
+
+func testL2RelayerProcessCommittedBatches(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	defer db.Close()
+
+	l2Cfg := cfg.L2Config
+	relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Cli, db, l2Cfg.RelayerConfig)
+	assert.NoError(t, err)
+
+	parentBatch1 := &types.BlockBatch{
+		Index:     0,
+		Hash:      common.Hash{}.String(),
+		StateRoot: common.Hash{}.String(),
+	}
+	batchData1 := types.NewBatchData(parentBatch1, []*types.WrappedBlock{wrappedBlock1}, nil)
+	dbTx, err := db.Beginx()
+	assert.NoError(t, err)
+	assert.NoError(t, db.NewBatchInDBTx(dbTx, batchData1))
+	batchHash := batchData1.Hash().Hex()
+	err = dbTx.Commit()
+	assert.NoError(t, err)
+
+	err = db.UpdateRollupStatus(context.Background(), batchHash, types.RollupCommitted)
+	assert.NoError(t, err)
+
+	tProof := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
+	tInstanceCommitments := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
+	err = db.UpdateProofByHash(context.Background(), batchHash, tProof, tInstanceCommitments, 100)
+	assert.NoError(t, err)
+	err = db.UpdateProvingStatus(batchHash, types.ProvingTaskVerified)
+	assert.NoError(t, err)
+
+	relayer.ProcessCommittedBatches()
+
+	status, err := db.GetRollupStatus(batchHash)
+	assert.NoError(t, err)
+	assert.Equal(t, types.RollupFinalizing, status)
+}
+
+func testL2RelayerSkipBatches(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	defer db.Close()
+
+	l2Cfg := cfg.L2Config
+	relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Cli, db, l2Cfg.RelayerConfig)
+	assert.NoError(t, err)
+
+	createBatch := func(rollupStatus types.RollupStatus, provingStatus types.ProvingStatus, index uint64) string {
+		dbTx, err := db.Beginx()
+		assert.NoError(t, err)
+		batchData := genBatchData(t, index)
+		assert.NoError(t, db.NewBatchInDBTx(dbTx, batchData))
+		batchHash := batchData.Hash().Hex()
+		err = dbTx.Commit()
+		assert.NoError(t, err)
+
+		err = db.UpdateRollupStatus(context.Background(), batchHash, rollupStatus)
+		assert.NoError(t, err)
+
+		tProof := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
+		tInstanceCommitments := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
+		err = db.UpdateProofByHash(context.Background(), batchHash, tProof, tInstanceCommitments, 100)
+		assert.NoError(t, err)
+		err = db.UpdateProvingStatus(batchHash, provingStatus)
+		assert.NoError(t, err)
+
+		return batchHash
+	}
+
+	skipped := []string{
+		createBatch(types.RollupCommitted, types.ProvingTaskSkipped, 1),
+		createBatch(types.RollupCommitted, types.ProvingTaskFailed, 2),
+	}
+
+	notSkipped := []string{
+		createBatch(types.RollupPending, types.ProvingTaskSkipped, 3),
+		createBatch(types.RollupCommitting, types.ProvingTaskSkipped, 4),
+		createBatch(types.RollupFinalizing, types.ProvingTaskSkipped, 5),
+		createBatch(types.RollupFinalized, types.ProvingTaskSkipped, 6),
+		createBatch(types.RollupPending, types.ProvingTaskFailed, 7),
+		createBatch(types.RollupCommitting, types.ProvingTaskFailed, 8),
+		createBatch(types.RollupFinalizing, types.ProvingTaskFailed, 9),
+		createBatch(types.RollupFinalized, types.ProvingTaskFailed, 10),
+		createBatch(types.RollupCommitted, types.ProvingTaskVerified, 11),
+	}
+
+	relayer.ProcessCommittedBatches()
+
+	for _, id := range skipped {
+		status, err := db.GetRollupStatus(id)
+		assert.NoError(t, err)
+		assert.Equal(t, types.RollupFinalizationSkipped, status)
+	}
+
+	for _, id := range notSkipped {
+		status, err := db.GetRollupStatus(id)
+		assert.NoError(t, err)
+		assert.NotEqual(t, types.RollupFinalizationSkipped, status)
+	}
+}
+
+func genBatchData(t *testing.T, index uint64) *types.BatchData {
+	templateBlockTrace, err := os.ReadFile("../../common/testdata/blockTrace_02.json")
+	assert.NoError(t, err)
+	// unmarshal blockTrace
+	wrappedBlock := &types.WrappedBlock{}
+	err = json.Unmarshal(templateBlockTrace, wrappedBlock)
+	assert.NoError(t, err)
+	wrappedBlock.Header.ParentHash = common.HexToHash("0x" + strconv.FormatUint(index+1, 16))
+	parentBatch := &types.BlockBatch{
+		Index: index,
+		Hash:  "0x0000000000000000000000000000000000000000",
+	}
+	return types.NewBatchData(parentBatch, []*types.WrappedBlock{wrappedBlock}, nil)
+}

bridge/relayer/params.go

@@ -0,0 +1,11 @@
+package relayer
+
+const (
+	gasPriceDiffPrecision = 1000000
+
+	defaultGasPriceDiff = 50000 // 5%
+
+	defaultL1MessageRelayMinGasLimit = 130000 // should be enough for both ERC20 and ETH relay
+
+	defaultL2MessageRelayMinGasLimit = 200000
+)

bridge/relayer/relayer_test.go

@@ -0,0 +1,108 @@
+package relayer_test
+
+import (
+	"encoding/json"
+	"os"
+	"testing"
+
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/scroll-tech/go-ethereum/log"
+	"github.com/stretchr/testify/assert"
+
+	"scroll-tech/common/docker"
+	"scroll-tech/common/types"
+
+	"scroll-tech/bridge/config"
+)
+
+var (
+	// config
+	cfg *config.Config
+
+	base *docker.App
+
+	// l2geth client
+	l2Cli *ethclient.Client
+
+	// block trace
+	wrappedBlock1 *types.WrappedBlock
+	wrappedBlock2 *types.WrappedBlock
+
+	// batch data
+	batchData1 *types.BatchData
+	batchData2 *types.BatchData
+)
+
+func setupEnv(t *testing.T) (err error) {
+	// Load config.
+	cfg, err = config.NewConfig("../config.json")
+	assert.NoError(t, err)
+
+	base.RunImages(t)
+
+	cfg.L2Config.RelayerConfig.SenderConfig.Endpoint = base.L1gethImg.Endpoint()
+	cfg.L1Config.RelayerConfig.SenderConfig.Endpoint = base.L2gethImg.Endpoint()
+	cfg.DBConfig = base.DBConfig
+
+	// Create l2geth client.
+	l2Cli, err = base.L2Client()
+	assert.NoError(t, err)
+
+	templateBlockTrace1, err := os.ReadFile("../../common/testdata/blockTrace_02.json")
+	if err != nil {
+		return err
+	}
+	// unmarshal blockTrace
+	wrappedBlock1 = &types.WrappedBlock{}
+	if err = json.Unmarshal(templateBlockTrace1, wrappedBlock1); err != nil {
+		return err
+	}
+	parentBatch1 := &types.BlockBatch{
+		Index:     0,
+		Hash:      "0x0cc6b102c2924402c14b2e3a19baccc316252bfdc44d9ec62e942d34e39ec729",
+		StateRoot: "0x2579122e8f9ec1e862e7d415cef2fb495d7698a8e5f0dddc5651ba4236336e7d",
+	}
+	batchData1 = types.NewBatchData(parentBatch1, []*types.WrappedBlock{wrappedBlock1}, nil)
+
+	templateBlockTrace2, err := os.ReadFile("../../common/testdata/blockTrace_03.json")
+	if err != nil {
+		return err
+	}
+	// unmarshal blockTrace
+	wrappedBlock2 = &types.WrappedBlock{}
+	if err = json.Unmarshal(templateBlockTrace2, wrappedBlock2); err != nil {
+		return err
+	}
+	parentBatch2 := &types.BlockBatch{
+		Index:     batchData1.Batch.BatchIndex,
+		Hash:      batchData1.Hash().Hex(),
+		StateRoot: batchData1.Batch.NewStateRoot.String(),
+	}
+	batchData2 = types.NewBatchData(parentBatch2, []*types.WrappedBlock{wrappedBlock2}, nil)
+
+	log.Info("batchHash", "batchhash1", batchData1.Hash().Hex(), "batchhash2", batchData2.Hash().Hex())
+
+	return err
+}
+
+func TestMain(m *testing.M) {
+	base = docker.NewDockerApp()
+
+	m.Run()
+
+	base.Free()
+}
+
+func TestFunctions(t *testing.T) {
+	if err := setupEnv(t); err != nil {
+		t.Fatal(err)
+	}
+	// Run l1 relayer test cases.
+	t.Run("TestCreateNewL1Relayer", testCreateNewL1Relayer)
+	// Run l2 relayer test cases.
+	t.Run("TestCreateNewRelayer", testCreateNewRelayer)
+	t.Run("TestL2RelayerProcessSaveEvents", testL2RelayerProcessSaveEvents)
+	t.Run("TestL2RelayerProcessCommittedBatches", testL2RelayerProcessCommittedBatches)
+	t.Run("TestL2RelayerSkipBatches", testL2RelayerSkipBatches)
+
+}

bridge/scripts/build_abi.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# generates go bindings from contracts, to paste into abi/bridge_abi.go
+# compile artifacts in /contracts folder with `forge build`` first 
+
 # Only run if it is ran from repository root.
 if [[ ! -d "cmd" ]]
 then
@@ -14,16 +17,20 @@ else
   mkdir -p contracts
 fi
 
-abi_name=("IL1GatewayRouter" "IL2GatewayRouter" "IL1ScrollMessenger" "IL2ScrollMessenger" "ZKRollup")
-pkg_name=("l1_gateway" "l2_gateway" "l1_messenger" "l2_messenger" "rollup")
-gen_name=("L1GatewayRouter" "L2GatewayRouter" "L1ScrollMessenger" "L2ScrollMessenger" "ZKRollup")
+abi_name=("IL1GatewayRouter" "IL2GatewayRouter" "IL1ScrollMessenger" "IL2ScrollMessenger" "IScrollChain" "L1MessageQueue")
+pkg_name=("l1_gateway" "l2_gateway" "l1_messenger" "l2_messenger" "scrollchain" "l1_message_queue")
+gen_name=("L1GatewayRouter" "L2GatewayRouter" "L1ScrollMessenger" "L2ScrollMessenger" "IScrollChain" "L1MessageQueue")
 
 for i in "${!abi_name[@]}"; do
-  abi="bridge/abi/${abi_name[$i]}.json"
-  pkg="${pkg_name[$i]}"
+  mkdir -p tmp
+  abi="tmp/${abi_name[$i]}.json"
+  cat ../contracts/artifacts/src/${abi_name[$i]}.sol/${abi_name[$i]}.json | jq '.abi' > $abi
+  pkg="${pkg_name[$i]}_abi"
   out="contracts/${pkg}/${gen_name[$i]}.go"
   echo "generating ${out} from ${abi}"
   mkdir -p contracts/$pkg
   abigen --abi=$abi --pkg=$pkg --out=$out
   awk '{sub("github.com/ethereum","github.com/scroll-tech")}1' $out > temp && mv temp $out
-done
+done
+
+rm -rf tmp

bridge/sender/estimategas.go

@@ -0,0 +1,73 @@
+package sender
+
+import (
+	"math/big"
+	"sync/atomic"
+
+	"github.com/scroll-tech/go-ethereum"
+	"github.com/scroll-tech/go-ethereum/accounts/abi/bind"
+	"github.com/scroll-tech/go-ethereum/common"
+)
+
+func (s *Sender) estimateLegacyGas(auth *bind.TransactOpts, contract *common.Address, value *big.Int, input []byte, minGasLimit uint64) (*FeeData, error) {
+	gasPrice, err := s.client.SuggestGasPrice(s.ctx)
+	if err != nil {
+		return nil, err
+	}
+	gasLimit, err := s.estimateGasLimit(auth, contract, input, gasPrice, nil, nil, value, minGasLimit)
+	if err != nil {
+		return nil, err
+	}
+	return &FeeData{
+		gasPrice: gasPrice,
+		gasLimit: gasLimit,
+	}, nil
+}
+
+func (s *Sender) estimateDynamicGas(auth *bind.TransactOpts, contract *common.Address, value *big.Int, input []byte, minGasLimit uint64) (*FeeData, error) {
+	gasTipCap, err := s.client.SuggestGasTipCap(s.ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	baseFee := big.NewInt(0)
+	if feeGas := atomic.LoadUint64(&s.baseFeePerGas); feeGas != 0 {
+		baseFee.SetUint64(feeGas)
+	}
+	gasFeeCap := new(big.Int).Add(
+		gasTipCap,
+		new(big.Int).Mul(baseFee, big.NewInt(2)),
+	)
+	gasLimit, err := s.estimateGasLimit(auth, contract, input, nil, gasTipCap, gasFeeCap, value, minGasLimit)
+	if err != nil {
+		return nil, err
+	}
+	return &FeeData{
+		gasLimit:  gasLimit,
+		gasTipCap: gasTipCap,
+		gasFeeCap: gasFeeCap,
+	}, nil
+}
+
+func (s *Sender) estimateGasLimit(opts *bind.TransactOpts, contract *common.Address, input []byte, gasPrice, gasTipCap, gasFeeCap, value *big.Int, minGasLimit uint64) (uint64, error) {
+	msg := ethereum.CallMsg{
+		From:      opts.From,
+		To:        contract,
+		GasPrice:  gasPrice,
+		GasTipCap: gasTipCap,
+		GasFeeCap: gasFeeCap,
+		Value:     value,
+		Data:      input,
+	}
+	gasLimit, err := s.client.EstimateGas(s.ctx, msg)
+	if err != nil {
+		return 0, err
+	}
+	if minGasLimit > gasLimit {
+		gasLimit = minGasLimit
+	}
+
+	gasLimit = gasLimit * 15 / 10 // 50% extra gas to void out of gas error
+
+	return gasLimit, nil
+}

bridge/sender/sender.go

@@ -6,23 +6,19 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
-	"reflect"
 	"strings"
-	"sync"
 	"sync/atomic"
 	"time"
 
-	geth "github.com/scroll-tech/go-ethereum"
+	cmapV2 "github.com/orcaman/concurrent-map/v2"
 	"github.com/scroll-tech/go-ethereum/accounts/abi/bind"
 	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/common/math"
 	"github.com/scroll-tech/go-ethereum/core/types"
 	"github.com/scroll-tech/go-ethereum/ethclient"
 	"github.com/scroll-tech/go-ethereum/log"
 
-	"scroll-tech/bridge/utils"
-
 	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/utils"
 )
 
 const (
@@ -39,17 +35,13 @@ const (
 var (
 	// ErrNoAvailableAccount indicates no available account error in the account pool.
 	ErrNoAvailableAccount = errors.New("sender has no available account to send transaction")
+	// ErrFullPending sender's pending pool is full.
+	ErrFullPending = errors.New("sender's pending pool is full")
 )
 
-// DefaultSenderConfig The default config
-var DefaultSenderConfig = config.SenderConfig{
-	Endpoint:            "",
-	EscalateBlocks:      3,
-	EscalateMultipleNum: 11,
-	EscalateMultipleDen: 10,
-	MaxGasPrice:         1000_000_000_000, // this is 1000 gwei
-	TxType:              AccessListTxType,
-}
+var (
+	defaultPendingLimit = 10
+)
 
 // Confirmation struct used to indicate transaction confirmation details
 type Confirmation struct {
@@ -86,9 +78,9 @@ type Sender struct {
 	// account fields.
 	auths *accountPool
 
-	blockNumber   uint64   // Current block number on chain.
-	baseFeePerGas uint64   // Current base fee per gas on chain
-	pendingTxs    sync.Map // Mapping from nonce to pending transaction
+	blockNumber   uint64                                            // Current block number on chain.
+	baseFeePerGas uint64                                            // Current base fee per gas on chain
+	pendingTxs    cmapV2.ConcurrentMap[string, *PendingTransaction] // Mapping from nonce to pending transaction
 	confirmCh     chan *Confirmation
 
 	stopCh chan struct{}
@@ -97,9 +89,6 @@ type Sender struct {
 // NewSender returns a new instance of transaction sender
 // txConfirmationCh is used to notify confirmed transaction
 func NewSender(ctx context.Context, config *config.SenderConfig, privs []*ecdsa.PrivateKey) (*Sender, error) {
-	if config == nil {
-		config = &DefaultSenderConfig
-	}
 	client, err := ethclient.Dial(config.Endpoint)
 	if err != nil {
 		return nil, err
@@ -131,6 +120,11 @@ func NewSender(ctx context.Context, config *config.SenderConfig, privs []*ecdsa.
 		}
 	}
 
+	// initialize pending limit with a default value
+	if config.PendingLimit == 0 {
+		config.PendingLimit = defaultPendingLimit
+	}
+
 	sender := &Sender{
 		ctx:           ctx,
 		config:        config,
@@ -140,7 +134,7 @@ func NewSender(ctx context.Context, config *config.SenderConfig, privs []*ecdsa.
 		confirmCh:     make(chan *Confirmation, 128),
 		blockNumber:   header.Number.Uint64(),
 		baseFeePerGas: baseFeePerGas,
-		pendingTxs:    sync.Map{},
+		pendingTxs:    cmapV2.New[*PendingTransaction](),
 		stopCh:        make(chan struct{}),
 	}
 
@@ -149,6 +143,21 @@ func NewSender(ctx context.Context, config *config.SenderConfig, privs []*ecdsa.
 	return sender, nil
 }
 
+// PendingCount returns the current number of pending txs.
+func (s *Sender) PendingCount() int {
+	return s.pendingTxs.Count()
+}
+
+// PendingLimit returns the maximum number of pending txs the sender can handle.
+func (s *Sender) PendingLimit() int {
+	return s.config.PendingLimit
+}
+
+// IsFull returns true if the sender's pending tx pool is full.
+func (s *Sender) IsFull() bool {
+	return s.pendingTxs.Count() >= s.config.PendingLimit
+}
+
 // Stop stop the sender module.
 func (s *Sender) Stop() {
 	close(s.stopCh)
@@ -165,57 +174,33 @@ func (s *Sender) NumberOfAccounts() int {
 	return len(s.auths.accounts)
 }
 
-func (s *Sender) getFeeData(auth *bind.TransactOpts, target *common.Address, value *big.Int, data []byte) (*FeeData, error) {
-	// estimate gas limit
-	gasLimit, err := s.client.EstimateGas(s.ctx, geth.CallMsg{From: auth.From, To: target, Value: value, Data: data})
-	if err != nil {
-		return nil, err
+func (s *Sender) getFeeData(auth *bind.TransactOpts, target *common.Address, value *big.Int, data []byte, minGasLimit uint64) (*FeeData, error) {
+	if s.config.TxType == DynamicFeeTxType {
+		return s.estimateDynamicGas(auth, target, value, data, minGasLimit)
 	}
-	gasLimit = gasLimit * 15 / 10 // 50% extra gas to void out of gas error
-	// @todo change it when Scroll enable EIP1559
-	if s.config.TxType != DynamicFeeTxType {
-		// estimate gas price
-		var gasPrice *big.Int
-		gasPrice, err = s.client.SuggestGasPrice(s.ctx)
-		if err != nil {
-			return nil, err
-		}
-		return &FeeData{
-			gasPrice: gasPrice,
-			gasLimit: gasLimit,
-		}, nil
-	}
-	gasTipCap, err := s.client.SuggestGasTipCap(s.ctx)
-	if err != nil {
-		return nil, err
-	}
-	// Make sure feeCap is bigger than txpool's gas price. 1000000000 is l2geth's default pool.gas value.
-	baseFee := atomic.LoadUint64(&s.baseFeePerGas)
-	maxFeePerGas := math.BigMax(big.NewInt(int64(baseFee)), big.NewInt(1000000000))
-	return &FeeData{
-		gasFeeCap: math.BigMax(maxFeePerGas, gasTipCap),
-		gasTipCap: math.BigMin(maxFeePerGas, gasTipCap),
-		gasLimit:  gasLimit,
-	}, nil
+	return s.estimateLegacyGas(auth, target, value, data, minGasLimit)
 }
 
 // SendTransaction send a signed L2tL1 transaction.
-func (s *Sender) SendTransaction(ID string, target *common.Address, value *big.Int, data []byte) (hash common.Hash, err error) {
+func (s *Sender) SendTransaction(ID string, target *common.Address, value *big.Int, data []byte, minGasLimit uint64) (hash common.Hash, err error) {
+	if s.IsFull() {
+		return common.Hash{}, ErrFullPending
+	}
 	// We occupy the ID, in case some other threads call with the same ID in the same time
-	if _, loaded := s.pendingTxs.LoadOrStore(ID, nil); loaded {
+	if ok := s.pendingTxs.SetIfAbsent(ID, nil); !ok {
 		return common.Hash{}, fmt.Errorf("has the repeat tx ID, ID: %s", ID)
 	}
 	// get
 	auth := s.auths.getAccount()
 	if auth == nil {
-		s.pendingTxs.Delete(ID) // release the ID on failure
+		s.pendingTxs.Remove(ID) // release the ID on failure
 		return common.Hash{}, ErrNoAvailableAccount
 	}
 
 	defer s.auths.releaseAccount(auth)
 	defer func() {
 		if err != nil {
-			s.pendingTxs.Delete(ID) // release the ID on failure
+			s.pendingTxs.Remove(ID) // release the ID on failure
 		}
 	}()
 
@@ -224,7 +209,7 @@ func (s *Sender) SendTransaction(ID string, target *common.Address, value *big.I
 		tx      *types.Transaction
 	)
 	// estimate gas fee
-	if feeData, err = s.getFeeData(auth, target, value, data); err != nil {
+	if feeData, err = s.getFeeData(auth, target, value, data, minGasLimit); err != nil {
 		return
 	}
 	if tx, err = s.createAndSendTx(auth, feeData, target, value, data, nil); err == nil {
@@ -236,7 +221,7 @@ func (s *Sender) SendTransaction(ID string, target *common.Address, value *big.I
 			submitAt: atomic.LoadUint64(&s.blockNumber),
 			feeData:  feeData,
 		}
-		s.pendingTxs.Store(ID, pending)
+		s.pendingTxs.Set(ID, pending)
 		return tx.Hash(), nil
 	}
 
@@ -377,17 +362,17 @@ func (s *Sender) checkPendingTransaction(header *types.Header, confirmed uint64)
 		}
 	}
 
-	s.pendingTxs.Range(func(key, value interface{}) bool {
+	for item := range s.pendingTxs.IterBuffered() {
+		key, pending := item.Key, item.Val
 		// ignore empty id, since we use empty id to occupy pending task
-		if value == nil || reflect.ValueOf(value).IsNil() {
-			return true
+		if pending == nil {
+			continue
 		}
 
-		pending := value.(*PendingTransaction)
 		receipt, err := s.client.TransactionReceipt(s.ctx, pending.tx.Hash())
 		if (err == nil) && (receipt != nil) {
 			if receipt.BlockNumber.Uint64() <= confirmed {
-				s.pendingTxs.Delete(key)
+				s.pendingTxs.Remove(key)
 				// send confirm message
 				s.confirmCh <- &Confirmation{
 					ID:           pending.id,
@@ -418,7 +403,7 @@ func (s *Sender) checkPendingTransaction(header *types.Header, confirmed uint64)
 				// We need to stop the program and manually handle the situation.
 				if strings.Contains(err.Error(), "nonce") {
 					// This key can be deleted
-					s.pendingTxs.Delete(key)
+					s.pendingTxs.Remove(key)
 					// Try get receipt by the latest replaced tx hash
 					receipt, err := s.client.TransactionReceipt(s.ctx, pending.tx.Hash())
 					if (err == nil) && (receipt != nil) {
@@ -440,8 +425,7 @@ func (s *Sender) checkPendingTransaction(header *types.Header, confirmed uint64)
 				pending.submitAt = number
 			}
 		}
-		return true
-	})
+	}
 }
 
 // Loop is the main event loop
@@ -449,7 +433,7 @@ func (s *Sender) loop(ctx context.Context) {
 	checkTick := time.NewTicker(time.Duration(s.config.CheckPendingTime) * time.Second)
 	defer checkTick.Stop()
 
-	checkBalanceTicker := time.NewTicker(time.Minute * 10)
+	checkBalanceTicker := time.NewTicker(time.Duration(s.config.CheckBalanceTime) * time.Second)
 	defer checkBalanceTicker.Stop()
 
 	for {

bridge/sender/sender_test.go

@@ -14,6 +14,7 @@ import (
 	cmap "github.com/orcaman/concurrent-map"
 	"github.com/scroll-tech/go-ethereum/common"
 	"github.com/scroll-tech/go-ethereum/crypto"
+	"github.com/scroll-tech/go-ethereum/ethclient"
 	"github.com/scroll-tech/go-ethereum/rpc"
 	"github.com/stretchr/testify/assert"
 
@@ -28,35 +29,81 @@ const TXBatch = 50
 var (
 	privateKeys []*ecdsa.PrivateKey
 	cfg         *config.Config
-	l2gethImg   docker.ImgInstance
+	base        *docker.App
 )
 
+func TestMain(m *testing.M) {
+	base = docker.NewDockerApp()
+
+	m.Run()
+
+	base.Free()
+}
+
 func setupEnv(t *testing.T) {
 	var err error
 	cfg, err = config.NewConfig("../config.json")
 	assert.NoError(t, err)
-
+	base.RunImages(t)
 	priv, err := crypto.HexToECDSA("1212121212121212121212121212121212121212121212121212121212121212")
 	assert.NoError(t, err)
 	// Load default private key.
 	privateKeys = []*ecdsa.PrivateKey{priv}
 
-	l2gethImg = docker.NewTestL2Docker(t)
-	cfg.L1Config.RelayerConfig.SenderConfig.Endpoint = l2gethImg.Endpoint()
+	cfg.L1Config.RelayerConfig.SenderConfig.Endpoint = base.L2gethImg.Endpoint()
 }
 
 func TestSender(t *testing.T) {
 	// Setup
 	setupEnv(t)
 
+	t.Run("test pending limit", func(t *testing.T) { testPendLimit(t) })
+
+	t.Run("test min gas limit", func(t *testing.T) { testMinGasLimit(t) })
+
 	t.Run("test 1 account sender", func(t *testing.T) { testBatchSender(t, 1) })
 	t.Run("test 3 account sender", func(t *testing.T) { testBatchSender(t, 3) })
 	t.Run("test 8 account sender", func(t *testing.T) { testBatchSender(t, 8) })
+}
 
-	// Teardown
-	t.Cleanup(func() {
-		assert.NoError(t, l2gethImg.Stop())
-	})
+func testPendLimit(t *testing.T) {
+	senderCfg := cfg.L1Config.RelayerConfig.SenderConfig
+	senderCfg.Confirmations = rpc.LatestBlockNumber
+	senderCfg.PendingLimit = 2
+	newSender, err := sender.NewSender(context.Background(), senderCfg, privateKeys)
+	assert.NoError(t, err)
+	defer newSender.Stop()
+
+	for i := 0; i < newSender.PendingLimit(); i++ {
+		_, err = newSender.SendTransaction(strconv.Itoa(i), &common.Address{}, big.NewInt(1), nil, 0)
+		assert.NoError(t, err)
+	}
+	assert.True(t, newSender.PendingCount() <= newSender.PendingLimit())
+}
+
+func testMinGasLimit(t *testing.T) {
+	senderCfg := cfg.L1Config.RelayerConfig.SenderConfig
+	senderCfg.Confirmations = rpc.LatestBlockNumber
+	newSender, err := sender.NewSender(context.Background(), senderCfg, privateKeys)
+	assert.NoError(t, err)
+	defer newSender.Stop()
+
+	client, err := ethclient.Dial(senderCfg.Endpoint)
+	assert.NoError(t, err)
+
+	// MinGasLimit = 0
+	txHash0, err := newSender.SendTransaction("0", &common.Address{}, big.NewInt(1), nil, 0)
+	assert.NoError(t, err)
+	tx0, _, err := client.TransactionByHash(context.Background(), txHash0)
+	assert.NoError(t, err)
+	assert.Greater(t, tx0.Gas(), uint64(0))
+
+	// MinGasLimit = 100000
+	txHash1, err := newSender.SendTransaction("1", &common.Address{}, big.NewInt(1), nil, 100000)
+	assert.NoError(t, err)
+	tx1, _, err := client.TransactionByHash(context.Background(), txHash1)
+	assert.NoError(t, err)
+	assert.Equal(t, tx1.Gas(), uint64(150000))
 }
 
 func testBatchSender(t *testing.T, batchSize int) {
@@ -70,6 +117,7 @@ func testBatchSender(t *testing.T, batchSize int) {
 
 	senderCfg := cfg.L1Config.RelayerConfig.SenderConfig
 	senderCfg.Confirmations = rpc.LatestBlockNumber
+	senderCfg.PendingLimit = batchSize * TXBatch
 	newSender, err := sender.NewSender(context.Background(), senderCfg, privateKeys)
 	if err != nil {
 		t.Fatal(err)
@@ -88,8 +136,8 @@ func testBatchSender(t *testing.T, batchSize int) {
 			for i := 0; i < TXBatch; i++ {
 				toAddr := common.HexToAddress("0x4592d8f8d7b001e72cb26a73e4fa1806a51ac79d")
 				id := strconv.Itoa(i + index*1000)
-				_, err := newSender.SendTransaction(id, &toAddr, big.NewInt(1), nil)
-				if errors.Is(err, sender.ErrNoAvailableAccount) {
+				_, err := newSender.SendTransaction(id, &toAddr, big.NewInt(1), nil, 0)
+				if errors.Is(err, sender.ErrNoAvailableAccount) || errors.Is(err, sender.ErrFullPending) {
 					<-time.After(time.Second)
 					continue
 				}

bridge/tests/bridge_test.go

@@ -26,11 +26,7 @@ var (
 
 	// private key
 	privateKey *ecdsa.PrivateKey
-
-	// docker consider handler.
-	l1gethImg docker.ImgInstance
-	l2gethImg docker.ImgInstance
-	dbImg     docker.ImgInstance
+	base       *docker.App
 
 	// clients
 	l1Client *ethclient.Client
@@ -45,14 +41,22 @@ var (
 	l1MessengerAddress  common.Address
 
 	// l1 rollup contract
-	l1RollupInstance *mock_bridge.MockBridgeL1
-	l1RollupAddress  common.Address
+	scrollChainInstance *mock_bridge.MockBridgeL1
+	scrollChainAddress  common.Address
 
 	// l2 messenger contract
 	l2MessengerInstance *mock_bridge.MockBridgeL2
 	l2MessengerAddress  common.Address
 )
 
+func TestMain(m *testing.M) {
+	base = docker.NewDockerApp()
+
+	m.Run()
+
+	base.Free()
+}
+
 func setupEnv(t *testing.T) {
 	var err error
 	privateKey, err = crypto.ToECDSA(common.FromHex("1212121212121212121212121212121212121212121212121212121212121212"))
@@ -61,6 +65,8 @@ func setupEnv(t *testing.T) {
 	assert.NoError(t, err)
 	rollupPrivateKey, err := crypto.ToECDSA(common.FromHex("1212121212121212121212121212121212121212121212121212121212121214"))
 	assert.NoError(t, err)
+	gasOraclePrivateKey, err := crypto.ToECDSA(common.FromHex("1212121212121212121212121212121212121212121212121212121212121215"))
+	assert.NoError(t, err)
 
 	// Load config.
 	cfg, err = config.NewConfig("../config.json")
@@ -68,23 +74,23 @@ func setupEnv(t *testing.T) {
 	cfg.L1Config.Confirmations = rpc.LatestBlockNumber
 	cfg.L1Config.RelayerConfig.MessageSenderPrivateKeys = []*ecdsa.PrivateKey{messagePrivateKey}
 	cfg.L1Config.RelayerConfig.RollupSenderPrivateKeys = []*ecdsa.PrivateKey{rollupPrivateKey}
+	cfg.L1Config.RelayerConfig.GasOracleSenderPrivateKeys = []*ecdsa.PrivateKey{gasOraclePrivateKey}
 	cfg.L2Config.Confirmations = rpc.LatestBlockNumber
 	cfg.L2Config.RelayerConfig.MessageSenderPrivateKeys = []*ecdsa.PrivateKey{messagePrivateKey}
 	cfg.L2Config.RelayerConfig.RollupSenderPrivateKeys = []*ecdsa.PrivateKey{rollupPrivateKey}
+	cfg.L2Config.RelayerConfig.GasOracleSenderPrivateKeys = []*ecdsa.PrivateKey{gasOraclePrivateKey}
+	base.RunImages(t)
 
 	// Create l1geth container.
-	l1gethImg = docker.NewTestL1Docker(t)
-	cfg.L2Config.RelayerConfig.SenderConfig.Endpoint = l1gethImg.Endpoint()
-	cfg.L1Config.Endpoint = l1gethImg.Endpoint()
+	cfg.L2Config.RelayerConfig.SenderConfig.Endpoint = base.L1gethImg.Endpoint()
+	cfg.L1Config.Endpoint = base.L1gethImg.Endpoint()
 
 	// Create l2geth container.
-	l2gethImg = docker.NewTestL2Docker(t)
-	cfg.L1Config.RelayerConfig.SenderConfig.Endpoint = l2gethImg.Endpoint()
-	cfg.L2Config.Endpoint = l2gethImg.Endpoint()
+	cfg.L1Config.RelayerConfig.SenderConfig.Endpoint = base.L2gethImg.Endpoint()
+	cfg.L2Config.Endpoint = base.L2gethImg.Endpoint()
 
 	// Create db container.
-	dbImg = docker.NewTestDBDocker(t, cfg.DBConfig.DriverName)
-	cfg.DBConfig.DSN = dbImg.Endpoint()
+	cfg.DBConfig = base.DBConfig
 
 	// Create l1geth and l2geth client.
 	l1Client, err = ethclient.Dial(cfg.L1Config.Endpoint)
@@ -99,8 +105,10 @@ func setupEnv(t *testing.T) {
 	// send some balance to message and rollup sender
 	transferEther(t, l1Auth, l1Client, messagePrivateKey)
 	transferEther(t, l1Auth, l1Client, rollupPrivateKey)
+	transferEther(t, l1Auth, l1Client, gasOraclePrivateKey)
 	transferEther(t, l2Auth, l2Client, messagePrivateKey)
 	transferEther(t, l2Auth, l2Client, rollupPrivateKey)
+	transferEther(t, l2Auth, l2Client, gasOraclePrivateKey)
 }
 
 func transferEther(t *testing.T, auth *bind.TransactOpts, client *ethclient.Client, privateKey *ecdsa.PrivateKey) {
@@ -138,18 +146,6 @@ func transferEther(t *testing.T, auth *bind.TransactOpts, client *ethclient.Clie
 	}
 }
 
-func free(t *testing.T) {
-	if dbImg != nil {
-		assert.NoError(t, dbImg.Stop())
-	}
-	if l1gethImg != nil {
-		assert.NoError(t, l1gethImg.Stop())
-	}
-	if l2gethImg != nil {
-		assert.NoError(t, l2gethImg.Stop())
-	}
-}
-
 func prepareContracts(t *testing.T) {
 	var err error
 	var tx *types.Transaction
@@ -160,10 +156,10 @@ func prepareContracts(t *testing.T) {
 	l1MessengerAddress, err = bind.WaitDeployed(context.Background(), l1Client, tx)
 	assert.NoError(t, err)
 
-	// L1 rollup contract
-	_, tx, l1RollupInstance, err = mock_bridge.DeployMockBridgeL1(l1Auth, l1Client)
+	// L1 ScrolChain contract
+	_, tx, scrollChainInstance, err = mock_bridge.DeployMockBridgeL1(l1Auth, l1Client)
 	assert.NoError(t, err)
-	l1RollupAddress, err = bind.WaitDeployed(context.Background(), l1Client, tx)
+	scrollChainAddress, err = bind.WaitDeployed(context.Background(), l1Client, tx)
 	assert.NoError(t, err)
 
 	// L2 messenger contract
@@ -173,12 +169,16 @@ func prepareContracts(t *testing.T) {
 	assert.NoError(t, err)
 
 	cfg.L1Config.L1MessengerAddress = l1MessengerAddress
-	cfg.L1Config.RollupContractAddress = l1RollupAddress
+	cfg.L1Config.L1MessageQueueAddress = l1MessengerAddress
+	cfg.L1Config.ScrollChainContractAddress = scrollChainAddress
 	cfg.L1Config.RelayerConfig.MessengerContractAddress = l2MessengerAddress
+	cfg.L1Config.RelayerConfig.GasPriceOracleContractAddress = l1MessengerAddress
 
 	cfg.L2Config.L2MessengerAddress = l2MessengerAddress
+	cfg.L2Config.L2MessageQueueAddress = l2MessengerAddress
 	cfg.L2Config.RelayerConfig.MessengerContractAddress = l1MessengerAddress
-	cfg.L2Config.RelayerConfig.RollupContractAddress = l1RollupAddress
+	cfg.L2Config.RelayerConfig.RollupContractAddress = scrollChainAddress
+	cfg.L2Config.RelayerConfig.GasPriceOracleContractAddress = l2MessengerAddress
 }
 
 func prepareAuth(t *testing.T, client *ethclient.Client, privateKey *ecdsa.PrivateKey) *bind.TransactOpts {
@@ -197,10 +197,14 @@ func TestFunction(t *testing.T) {
 	// l1 rollup and watch rollup events
 	t.Run("TestCommitBatchAndFinalizeBatch", testCommitBatchAndFinalizeBatch)
 
-	// l2 message
-	t.Run("testRelayL2MessageSucceed", testRelayL2MessageSucceed)
+	// l1 message
+	t.Run("TestRelayL1MessageSucceed", testRelayL1MessageSucceed)
+
+	// l2 message
+	t.Run("TestRelayL2MessageSucceed", testRelayL2MessageSucceed)
+
+	// l1/l2 gas oracle
+	t.Run("TestImportL1GasPrice", testImportL1GasPrice)
+	t.Run("TestImportL2GasPrice", testImportL2GasPrice)
 
-	t.Cleanup(func() {
-		free(t)
-	})
 }

bridge/tests/gas_oracle_test.go

@@ -0,0 +1,127 @@
+package tests
+
+import (
+	"context"
+	"math/big"
+	"testing"
+
+	"github.com/scroll-tech/go-ethereum/common"
+	geth_types "github.com/scroll-tech/go-ethereum/core/types"
+	"github.com/stretchr/testify/assert"
+
+	"scroll-tech/common/types"
+
+	"scroll-tech/bridge/relayer"
+	"scroll-tech/bridge/watcher"
+
+	"scroll-tech/database"
+	"scroll-tech/database/migrate"
+)
+
+func testImportL1GasPrice(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	defer db.Close()
+
+	prepareContracts(t)
+
+	l1Cfg := cfg.L1Config
+
+	// Create L1Relayer
+	l1Relayer, err := relayer.NewLayer1Relayer(context.Background(), db, l1Cfg.RelayerConfig)
+	assert.NoError(t, err)
+
+	// Create L1Watcher
+	startHeight, err := l1Client.BlockNumber(context.Background())
+	assert.NoError(t, err)
+	l1Watcher := watcher.NewL1WatcherClient(context.Background(), l1Client, startHeight-1, 0, l1Cfg.L1MessengerAddress, l1Cfg.L1MessageQueueAddress, l1Cfg.ScrollChainContractAddress, db)
+
+	// fetch new blocks
+	number, err := l1Client.BlockNumber(context.Background())
+	assert.Greater(t, number, startHeight-1)
+	assert.NoError(t, err)
+	err = l1Watcher.FetchBlockHeader(number)
+	assert.NoError(t, err)
+
+	// check db status
+	latestBlockHeight, err := db.GetLatestL1BlockHeight()
+	assert.NoError(t, err)
+	assert.Equal(t, number, latestBlockHeight)
+	blocks, err := db.GetL1BlockInfos(map[string]interface{}{
+		"number": latestBlockHeight,
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, len(blocks), 1)
+	assert.Equal(t, blocks[0].GasOracleStatus, types.GasOraclePending)
+	assert.Equal(t, blocks[0].OracleTxHash.Valid, false)
+
+	// relay gas price
+	l1Relayer.ProcessGasPriceOracle()
+	blocks, err = db.GetL1BlockInfos(map[string]interface{}{
+		"number": latestBlockHeight,
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, len(blocks), 1)
+	assert.Equal(t, blocks[0].GasOracleStatus, types.GasOracleImporting)
+	assert.Equal(t, blocks[0].OracleTxHash.Valid, true)
+}
+
+func testImportL2GasPrice(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	defer db.Close()
+
+	prepareContracts(t)
+
+	l2Cfg := cfg.L2Config
+
+	// Create L2Relayer
+	l2Relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Client, db, l2Cfg.RelayerConfig)
+	assert.NoError(t, err)
+
+	// add fake blocks
+	traces := []*types.WrappedBlock{
+		{
+			Header: &geth_types.Header{
+				Number:     big.NewInt(1),
+				ParentHash: common.Hash{},
+				Difficulty: big.NewInt(0),
+				BaseFee:    big.NewInt(0),
+			},
+			Transactions:     nil,
+			WithdrawTrieRoot: common.Hash{},
+		},
+	}
+	assert.NoError(t, db.InsertWrappedBlocks(traces))
+
+	parentBatch := &types.BlockBatch{
+		Index: 0,
+		Hash:  "0x0000000000000000000000000000000000000000",
+	}
+	batchData := types.NewBatchData(parentBatch, []*types.WrappedBlock{
+		traces[0],
+	}, cfg.L2Config.BatchProposerConfig.PublicInputConfig)
+
+	// add fake batch
+	dbTx, err := db.Beginx()
+	assert.NoError(t, err)
+	assert.NoError(t, db.NewBatchInDBTx(dbTx, batchData))
+	assert.NoError(t, dbTx.Commit())
+
+	// check db status
+	batch, err := db.GetLatestBatch()
+	assert.NoError(t, err)
+	assert.Equal(t, batch.OracleStatus, types.GasOraclePending)
+	assert.Equal(t, batch.OracleTxHash.Valid, false)
+
+	// relay gas price
+	l2Relayer.ProcessGasPriceOracle()
+	batch, err = db.GetLatestBatch()
+	assert.NoError(t, err)
+	assert.Equal(t, batch.OracleStatus, types.GasOracleImporting)
+	assert.Equal(t, batch.OracleTxHash.Valid, true)
+}

bridge/tests/l1_message_relay_test.go

@@ -0,0 +1,84 @@
+package tests
+
+import (
+	"context"
+	"math/big"
+	"testing"
+
+	"github.com/scroll-tech/go-ethereum/accounts/abi/bind"
+	"github.com/scroll-tech/go-ethereum/common"
+	geth_types "github.com/scroll-tech/go-ethereum/core/types"
+	"github.com/scroll-tech/go-ethereum/rpc"
+	"github.com/stretchr/testify/assert"
+
+	"scroll-tech/common/types"
+
+	"scroll-tech/bridge/relayer"
+	"scroll-tech/bridge/watcher"
+
+	"scroll-tech/database"
+	"scroll-tech/database/migrate"
+)
+
+func testRelayL1MessageSucceed(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	defer db.Close()
+
+	prepareContracts(t)
+
+	l1Cfg := cfg.L1Config
+	l2Cfg := cfg.L2Config
+
+	// Create L1Relayer
+	l1Relayer, err := relayer.NewLayer1Relayer(context.Background(), db, l1Cfg.RelayerConfig)
+	assert.NoError(t, err)
+	// Create L1Watcher
+	confirmations := rpc.LatestBlockNumber
+	l1Watcher := watcher.NewL1WatcherClient(context.Background(), l1Client, 0, confirmations, l1Cfg.L1MessengerAddress, l1Cfg.L1MessageQueueAddress, l1Cfg.ScrollChainContractAddress, db)
+
+	// Create L2Watcher
+	l2Watcher := watcher.NewL2WatcherClient(context.Background(), l2Client, confirmations, l2Cfg.L2MessengerAddress, l2Cfg.L2MessageQueueAddress, l2Cfg.WithdrawTrieRootSlot, db)
+
+	// send message through l1 messenger contract
+	nonce, err := l1MessengerInstance.MessageNonce(&bind.CallOpts{})
+	assert.NoError(t, err)
+	sendTx, err := l1MessengerInstance.SendMessage(l1Auth, l2Auth.From, big.NewInt(0), common.Hex2Bytes("00112233"), big.NewInt(0))
+	assert.NoError(t, err)
+	sendReceipt, err := bind.WaitMined(context.Background(), l1Client, sendTx)
+	assert.NoError(t, err)
+	if sendReceipt.Status != geth_types.ReceiptStatusSuccessful || err != nil {
+		t.Fatalf("Call failed")
+	}
+
+	// l1 watch process events
+	l1Watcher.FetchContractEvent()
+
+	// check db status
+	msg, err := db.GetL1MessageByQueueIndex(nonce.Uint64())
+	assert.NoError(t, err)
+	assert.Equal(t, msg.Status, types.MsgPending)
+	assert.Equal(t, msg.Target, l2Auth.From.String())
+
+	// process l1 messages
+	l1Relayer.ProcessSavedEvents()
+	msg, err = db.GetL1MessageByQueueIndex(nonce.Uint64())
+	assert.NoError(t, err)
+	assert.Equal(t, msg.Status, types.MsgSubmitted)
+	relayTxHash, err := db.GetRelayL1MessageTxHash(nonce.Uint64())
+	assert.NoError(t, err)
+	assert.Equal(t, true, relayTxHash.Valid)
+	relayTx, _, err := l2Client.TransactionByHash(context.Background(), common.HexToHash(relayTxHash.String))
+	assert.NoError(t, err)
+	relayTxReceipt, err := bind.WaitMined(context.Background(), l2Client, relayTx)
+	assert.NoError(t, err)
+	assert.Equal(t, len(relayTxReceipt.Logs), 1)
+
+	// fetch message relayed events
+	l2Watcher.FetchContractEvent()
+	msg, err = db.GetL1MessageByQueueIndex(nonce.Uint64())
+	assert.NoError(t, err)
+	assert.Equal(t, msg.Status, types.MsgConfirmed)
+}

bridge/tests/l2_message_relay_test.go

@@ -7,16 +7,17 @@ import (
 
 	"github.com/scroll-tech/go-ethereum/accounts/abi/bind"
 	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/core/types"
+	geth_types "github.com/scroll-tech/go-ethereum/core/types"
 	"github.com/scroll-tech/go-ethereum/rpc"
 	"github.com/stretchr/testify/assert"
 
+	"scroll-tech/common/types"
+
+	"scroll-tech/bridge/relayer"
+	"scroll-tech/bridge/watcher"
+
 	"scroll-tech/database"
 	"scroll-tech/database/migrate"
-	"scroll-tech/database/orm"
-
-	"scroll-tech/bridge/l1"
-	"scroll-tech/bridge/l2"
 )
 
 func testRelayL2MessageSucceed(t *testing.T) {
@@ -28,19 +29,19 @@ func testRelayL2MessageSucceed(t *testing.T) {
 
 	prepareContracts(t)
 
-	// Create L2Relayer
 	l2Cfg := cfg.L2Config
-	l2Relayer, err := l2.NewLayer2Relayer(context.Background(), db, l2Cfg.RelayerConfig)
-	assert.NoError(t, err)
-	defer l2Relayer.Stop()
 
 	// Create L2Watcher
 	confirmations := rpc.LatestBlockNumber
-	l2Watcher := l2.NewL2WatcherClient(context.Background(), l2Client, confirmations, l2Cfg.BatchProposerConfig, l2Cfg.L2MessengerAddress, db)
+	l2Watcher := watcher.NewL2WatcherClient(context.Background(), l2Client, confirmations, l2Cfg.L2MessengerAddress, l2Cfg.L2MessageQueueAddress, l2Cfg.WithdrawTrieRootSlot, db)
+
+	// Create L2Relayer
+	l2Relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Client, db, l2Cfg.RelayerConfig)
+	assert.NoError(t, err)
 
 	// Create L1Watcher
 	l1Cfg := cfg.L1Config
-	l1Watcher := l1.NewWatcher(context.Background(), l1Client, 0, confirmations, l1Cfg.L1MessengerAddress, l1Cfg.RollupContractAddress, db)
+	l1Watcher := watcher.NewL1WatcherClient(context.Background(), l1Client, 0, confirmations, l1Cfg.L1MessengerAddress, l1Cfg.L1MessageQueueAddress, l1Cfg.ScrollChainContractAddress, db)
 
 	// send message through l2 messenger contract
 	nonce, err := l2MessengerInstance.MessageNonce(&bind.CallOpts{})
@@ -49,72 +50,70 @@ func testRelayL2MessageSucceed(t *testing.T) {
 	assert.NoError(t, err)
 	sendReceipt, err := bind.WaitMined(context.Background(), l2Client, sendTx)
 	assert.NoError(t, err)
-	if sendReceipt.Status != types.ReceiptStatusSuccessful || err != nil {
+	if sendReceipt.Status != geth_types.ReceiptStatusSuccessful || err != nil {
 		t.Fatalf("Call failed")
 	}
 
 	// l2 watch process events
-	l2Watcher.FetchContractEvent(sendReceipt.BlockNumber.Uint64())
+	l2Watcher.FetchContractEvent()
 
 	// check db status
 	msg, err := db.GetL2MessageByNonce(nonce.Uint64())
 	assert.NoError(t, err)
-	assert.Equal(t, msg.Status, orm.MsgPending)
+	assert.Equal(t, msg.Status, types.MsgPending)
 	assert.Equal(t, msg.Sender, l2Auth.From.String())
 	assert.Equal(t, msg.Target, l1Auth.From.String())
 
 	// add fake blocks
-	traces := []*types.BlockTrace{
+	traces := []*types.WrappedBlock{
 		{
-			Header: &types.Header{
+			Header: &geth_types.Header{
 				Number:     sendReceipt.BlockNumber,
 				ParentHash: common.Hash{},
 				Difficulty: big.NewInt(0),
 				BaseFee:    big.NewInt(0),
 			},
-			StorageTrace: &types.StorageTrace{},
+			Transactions:     nil,
+			WithdrawTrieRoot: common.Hash{},
 		},
 	}
-	err = db.InsertBlockTraces(traces)
-	assert.NoError(t, err)
+	assert.NoError(t, db.InsertWrappedBlocks(traces))
+
+	parentBatch := &types.BlockBatch{
+		Index: 0,
+		Hash:  "0x0000000000000000000000000000000000000000",
+	}
+	batchData := types.NewBatchData(parentBatch, []*types.WrappedBlock{
+		traces[0],
+	}, cfg.L2Config.BatchProposerConfig.PublicInputConfig)
+	batchHash := batchData.Hash().String()
 
 	// add fake batch
 	dbTx, err := db.Beginx()
 	assert.NoError(t, err)
-	batchID, err := db.NewBatchInDBTx(dbTx,
-		&orm.BlockInfo{
-			Number:     traces[0].Header.Number.Uint64(),
-			Hash:       traces[0].Header.Hash().String(),
-			ParentHash: traces[0].Header.ParentHash.String(),
-		},
-		&orm.BlockInfo{
-			Number:     traces[0].Header.Number.Uint64(),
-			Hash:       traces[0].Header.Hash().String(),
-			ParentHash: traces[0].Header.ParentHash.String(),
-		},
-		traces[0].Header.ParentHash.String(), 1, 194676)
-	assert.NoError(t, err)
-	err = db.SetBatchIDForBlocksInDBTx(dbTx, []uint64{
-		traces[0].Header.Number.Uint64(),
-		traces[0].Header.Number.Uint64()}, batchID)
-	assert.NoError(t, err)
-	err = dbTx.Commit()
+	assert.NoError(t, db.NewBatchInDBTx(dbTx, batchData))
+	var blockIDs = make([]uint64, len(batchData.Batch.Blocks))
+	for i, block := range batchData.Batch.Blocks {
+		blockIDs[i] = block.BlockNumber
+	}
+	err = db.SetBatchHashForL2BlocksInDBTx(dbTx, blockIDs, batchHash)
 	assert.NoError(t, err)
+	assert.NoError(t, dbTx.Commit())
 
 	// add dummy proof
 	tProof := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
 	tInstanceCommitments := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
-	err = db.UpdateProofByID(context.Background(), batchID, tProof, tInstanceCommitments, 100)
+	err = db.UpdateProofByHash(context.Background(), batchHash, tProof, tInstanceCommitments, 100)
 	assert.NoError(t, err)
-	err = db.UpdateProvingStatus(batchID, orm.ProvingTaskVerified)
+	err = db.UpdateProvingStatus(batchHash, types.ProvingTaskVerified)
 	assert.NoError(t, err)
 
 	// process pending batch and check status
-	l2Relayer.ProcessPendingBatches()
-	status, err := db.GetRollupStatus(batchID)
+	l2Relayer.SendCommitTx([]*types.BatchData{batchData})
+	status, err := db.GetRollupStatus(batchHash)
 	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupCommitting, status)
-	commitTxHash, err := db.GetCommitTxHash(batchID)
+	assert.Equal(t, types.RollupCommitting, status)
+	commitTxHash, err := db.GetCommitTxHash(batchHash)
 	assert.NoError(t, err)
 	assert.Equal(t, true, commitTxHash.Valid)
 	commitTx, _, err := l1Client.TransactionByHash(context.Background(), common.HexToHash(commitTxHash.String))
@@ -124,18 +123,18 @@ func testRelayL2MessageSucceed(t *testing.T) {
 	assert.Equal(t, len(commitTxReceipt.Logs), 1)
 
 	// fetch CommitBatch rollup events
-	err = l1Watcher.FetchContractEvent(commitTxReceipt.BlockNumber.Uint64())
+	err = l1Watcher.FetchContractEvent()
 	assert.NoError(t, err)
-	status, err = db.GetRollupStatus(batchID)
+	status, err = db.GetRollupStatus(batchHash)
 	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupCommitted, status)
+	assert.Equal(t, types.RollupCommitted, status)
 
 	// process committed batch and check status
 	l2Relayer.ProcessCommittedBatches()
-	status, err = db.GetRollupStatus(batchID)
+	status, err = db.GetRollupStatus(batchHash)
 	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupFinalizing, status)
-	finalizeTxHash, err := db.GetFinalizeTxHash(batchID)
+	assert.Equal(t, types.RollupFinalizing, status)
+	finalizeTxHash, err := db.GetFinalizeTxHash(batchHash)
 	assert.NoError(t, err)
 	assert.Equal(t, true, finalizeTxHash.Valid)
 	finalizeTx, _, err := l1Client.TransactionByHash(context.Background(), common.HexToHash(finalizeTxHash.String))
@@ -145,17 +144,17 @@ func testRelayL2MessageSucceed(t *testing.T) {
 	assert.Equal(t, len(finalizeTxReceipt.Logs), 1)
 
 	// fetch FinalizeBatch events
-	err = l1Watcher.FetchContractEvent(finalizeTxReceipt.BlockNumber.Uint64())
+	err = l1Watcher.FetchContractEvent()
 	assert.NoError(t, err)
-	status, err = db.GetRollupStatus(batchID)
+	status, err = db.GetRollupStatus(batchHash)
 	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupFinalized, status)
+	assert.Equal(t, types.RollupFinalized, status)
 
 	// process l2 messages
 	l2Relayer.ProcessSavedEvents()
 	msg, err = db.GetL2MessageByNonce(nonce.Uint64())
 	assert.NoError(t, err)
-	assert.Equal(t, msg.Status, orm.MsgSubmitted)
+	assert.Equal(t, msg.Status, types.MsgSubmitted)
 	relayTxHash, err := db.GetRelayL2MessageTxHash(nonce.Uint64())
 	assert.NoError(t, err)
 	assert.Equal(t, true, relayTxHash.Valid)
@@ -166,9 +165,9 @@ func testRelayL2MessageSucceed(t *testing.T) {
 	assert.Equal(t, len(relayTxReceipt.Logs), 1)
 
 	// fetch message relayed events
-	err = l1Watcher.FetchContractEvent(relayTxReceipt.BlockNumber.Uint64())
+	err = l1Watcher.FetchContractEvent()
 	assert.NoError(t, err)
 	msg, err = db.GetL2MessageByNonce(nonce.Uint64())
 	assert.NoError(t, err)
-	assert.Equal(t, msg.Status, orm.MsgConfirmed)
+	assert.Equal(t, msg.Status, types.MsgConfirmed)
 }

bridge/tests/rollup_test.go

@@ -3,18 +3,20 @@ package tests
 import (
 	"context"
 	"math/big"
-	"scroll-tech/database"
-	"scroll-tech/database/migrate"
-	"scroll-tech/database/orm"
 	"testing"
 
-	"scroll-tech/bridge/l1"
-	"scroll-tech/bridge/l2"
-
 	"github.com/scroll-tech/go-ethereum/accounts/abi/bind"
 	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/core/types"
+	geth_types "github.com/scroll-tech/go-ethereum/core/types"
 	"github.com/stretchr/testify/assert"
+
+	"scroll-tech/common/types"
+
+	"scroll-tech/bridge/relayer"
+	"scroll-tech/bridge/watcher"
+
+	"scroll-tech/database"
+	"scroll-tech/database/migrate"
 )
 
 func testCommitBatchAndFinalizeBatch(t *testing.T) {
@@ -28,63 +30,62 @@ func testCommitBatchAndFinalizeBatch(t *testing.T) {
 
 	// Create L2Relayer
 	l2Cfg := cfg.L2Config
-	l2Relayer, err := l2.NewLayer2Relayer(context.Background(), db, l2Cfg.RelayerConfig)
+	l2Relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Client, db, l2Cfg.RelayerConfig)
 	assert.NoError(t, err)
-	defer l2Relayer.Stop()
 
 	// Create L1Watcher
 	l1Cfg := cfg.L1Config
-	l1Watcher := l1.NewWatcher(context.Background(), l1Client, 0, l1Cfg.Confirmations, l1Cfg.L1MessengerAddress, l1Cfg.RollupContractAddress, db)
+	l1Watcher := watcher.NewL1WatcherClient(context.Background(), l1Client, 0, l1Cfg.Confirmations, l1Cfg.L1MessengerAddress, l1Cfg.L1MessageQueueAddress, l1Cfg.ScrollChainContractAddress, db)
 
 	// add some blocks to db
-	var traces []*types.BlockTrace
+	var wrappedBlocks []*types.WrappedBlock
 	var parentHash common.Hash
 	for i := 1; i <= 10; i++ {
-		header := types.Header{
+		header := geth_types.Header{
 			Number:     big.NewInt(int64(i)),
 			ParentHash: parentHash,
 			Difficulty: big.NewInt(0),
 			BaseFee:    big.NewInt(0),
 		}
-		traces = append(traces, &types.BlockTrace{
-			Header:       &header,
-			StorageTrace: &types.StorageTrace{},
+		wrappedBlocks = append(wrappedBlocks, &types.WrappedBlock{
+			Header:           &header,
+			Transactions:     nil,
+			WithdrawTrieRoot: common.Hash{},
 		})
 		parentHash = header.Hash()
 	}
-	err = db.InsertBlockTraces(traces)
-	assert.NoError(t, err)
+	assert.NoError(t, db.InsertWrappedBlocks(wrappedBlocks))
+
+	parentBatch := &types.BlockBatch{
+		Index: 0,
+		Hash:  "0x0000000000000000000000000000000000000000",
+	}
+	batchData := types.NewBatchData(parentBatch, []*types.WrappedBlock{
+		wrappedBlocks[0],
+		wrappedBlocks[1],
+	}, cfg.L2Config.BatchProposerConfig.PublicInputConfig)
+
+	batchHash := batchData.Hash().String()
 
 	// add one batch to db
 	dbTx, err := db.Beginx()
 	assert.NoError(t, err)
-	batchID, err := db.NewBatchInDBTx(dbTx,
-		&orm.BlockInfo{
-			Number:     traces[0].Header.Number.Uint64(),
-			Hash:       traces[0].Header.Hash().String(),
-			ParentHash: traces[0].Header.ParentHash.String(),
-		},
-		&orm.BlockInfo{
-			Number:     traces[1].Header.Number.Uint64(),
-			Hash:       traces[1].Header.Hash().String(),
-			ParentHash: traces[1].Header.ParentHash.String(),
-		},
-		traces[0].Header.ParentHash.String(), 1, 194676) // parentHash & totalTxNum & totalL2Gas don't really matter here
-	assert.NoError(t, err)
-	err = db.SetBatchIDForBlocksInDBTx(dbTx, []uint64{
-		traces[0].Header.Number.Uint64(),
-		traces[1].Header.Number.Uint64()}, batchID)
-	assert.NoError(t, err)
-	err = dbTx.Commit()
+	assert.NoError(t, db.NewBatchInDBTx(dbTx, batchData))
+	var blockIDs = make([]uint64, len(batchData.Batch.Blocks))
+	for i, block := range batchData.Batch.Blocks {
+		blockIDs[i] = block.BlockNumber
+	}
+	err = db.SetBatchHashForL2BlocksInDBTx(dbTx, blockIDs, batchHash)
 	assert.NoError(t, err)
+	assert.NoError(t, dbTx.Commit())
 
 	// process pending batch and check status
-	l2Relayer.ProcessPendingBatches()
+	l2Relayer.SendCommitTx([]*types.BatchData{batchData})
 
-	status, err := db.GetRollupStatus(batchID)
+	status, err := db.GetRollupStatus(batchHash)
 	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupCommitting, status)
-	commitTxHash, err := db.GetCommitTxHash(batchID)
+	assert.Equal(t, types.RollupCommitting, status)
+	commitTxHash, err := db.GetCommitTxHash(batchHash)
 	assert.NoError(t, err)
 	assert.Equal(t, true, commitTxHash.Valid)
 	commitTx, _, err := l1Client.TransactionByHash(context.Background(), common.HexToHash(commitTxHash.String))
@@ -94,27 +95,27 @@ func testCommitBatchAndFinalizeBatch(t *testing.T) {
 	assert.Equal(t, len(commitTxReceipt.Logs), 1)
 
 	// fetch rollup events
-	err = l1Watcher.FetchContractEvent(commitTxReceipt.BlockNumber.Uint64())
+	err = l1Watcher.FetchContractEvent()
 	assert.NoError(t, err)
-	status, err = db.GetRollupStatus(batchID)
+	status, err = db.GetRollupStatus(batchHash)
 	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupCommitted, status)
+	assert.Equal(t, types.RollupCommitted, status)
 
 	// add dummy proof
 	tProof := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
 	tInstanceCommitments := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
-	err = db.UpdateProofByID(context.Background(), batchID, tProof, tInstanceCommitments, 100)
+	err = db.UpdateProofByHash(context.Background(), batchHash, tProof, tInstanceCommitments, 100)
 	assert.NoError(t, err)
-	err = db.UpdateProvingStatus(batchID, orm.ProvingTaskVerified)
+	err = db.UpdateProvingStatus(batchHash, types.ProvingTaskVerified)
 	assert.NoError(t, err)
 
 	// process committed batch and check status
 	l2Relayer.ProcessCommittedBatches()
 
-	status, err = db.GetRollupStatus(batchID)
+	status, err = db.GetRollupStatus(batchHash)
 	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupFinalizing, status)
-	finalizeTxHash, err := db.GetFinalizeTxHash(batchID)
+	assert.Equal(t, types.RollupFinalizing, status)
+	finalizeTxHash, err := db.GetFinalizeTxHash(batchHash)
 	assert.NoError(t, err)
 	assert.Equal(t, true, finalizeTxHash.Valid)
 	finalizeTx, _, err := l1Client.TransactionByHash(context.Background(), common.HexToHash(finalizeTxHash.String))
@@ -124,9 +125,9 @@ func testCommitBatchAndFinalizeBatch(t *testing.T) {
 	assert.Equal(t, len(finalizeTxReceipt.Logs), 1)
 
 	// fetch rollup events
-	err = l1Watcher.FetchContractEvent(finalizeTxReceipt.BlockNumber.Uint64())
+	err = l1Watcher.FetchContractEvent()
 	assert.NoError(t, err)
-	status, err = db.GetRollupStatus(batchID)
+	status, err = db.GetRollupStatus(batchHash)
 	assert.NoError(t, err)
-	assert.Equal(t, orm.RollupFinalized, status)
+	assert.Equal(t, types.RollupFinalized, status)
 }

bridge/utils/utils.go

@@ -1,21 +1,20 @@
 package utils
 
 import (
-	"bytes"
+	"fmt"
 	"math/big"
 
-	"github.com/iden3/go-iden3-crypto/keccak256"
+	"github.com/scroll-tech/go-ethereum/accounts/abi"
 	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/common/math"
+	"github.com/scroll-tech/go-ethereum/core/types"
+	"github.com/scroll-tech/go-ethereum/crypto"
+
+	bridgeabi "scroll-tech/bridge/abi"
 )
 
 // Keccak2 compute the keccack256 of two concatenations of bytes32
 func Keccak2(a common.Hash, b common.Hash) common.Hash {
-	return common.BytesToHash(keccak256.Hash(append(a.Bytes()[:], b.Bytes()[:]...)))
-}
-
-func encodePacked(input ...[]byte) []byte {
-	return bytes.Join(input, nil)
+	return common.BytesToHash(crypto.Keccak256(append(a.Bytes()[:], b.Bytes()[:]...)))
 }
 
 // ComputeMessageHash compute the message hash
@@ -23,34 +22,11 @@ func ComputeMessageHash(
 	sender common.Address,
 	target common.Address,
 	value *big.Int,
-	fee *big.Int,
-	deadline *big.Int,
-	message []byte,
 	messageNonce *big.Int,
+	message []byte,
 ) common.Hash {
-	packed := encodePacked(
-		sender.Bytes(),
-		target.Bytes(),
-		math.U256Bytes(value),
-		math.U256Bytes(fee),
-		math.U256Bytes(deadline),
-		math.U256Bytes(messageNonce),
-		message,
-	)
-	return common.BytesToHash(keccak256.Hash(packed))
-}
-
-// BufferToUint256Be convert bytes array to uint256 array assuming big-endian
-func BufferToUint256Be(buffer []byte) []*big.Int {
-	buffer256 := make([]*big.Int, len(buffer)/32)
-	for i := 0; i < len(buffer)/32; i++ {
-		buffer256[i] = big.NewInt(0)
-		for j := 0; j < 32; j++ {
-			buffer256[i] = buffer256[i].Lsh(buffer256[i], 8)
-			buffer256[i] = buffer256[i].Add(buffer256[i], big.NewInt(int64(buffer[i*32+j])))
-		}
-	}
-	return buffer256
+	data, _ := bridgeabi.L2ScrollMessengerABI.Pack("relayMessage", sender, target, value, messageNonce, message)
+	return common.BytesToHash(crypto.Keccak256(data))
 }
 
 // BufferToUint256Le convert bytes array to uint256 array assuming little-endian
@@ -67,3 +43,23 @@ func BufferToUint256Le(buffer []byte) []*big.Int {
 	}
 	return buffer256
 }
+
+// UnpackLog unpacks a retrieved log into the provided output structure.
+// @todo: add unit test.
+func UnpackLog(c *abi.ABI, out interface{}, event string, log types.Log) error {
+	if log.Topics[0] != c.Events[event].ID {
+		return fmt.Errorf("event signature mismatch")
+	}
+	if len(log.Data) > 0 {
+		if err := c.UnpackIntoInterface(out, event, log.Data); err != nil {
+			return err
+		}
+	}
+	var indexed abi.Arguments
+	for _, arg := range c.Events[event].Inputs {
+		if arg.Indexed {
+			indexed = append(indexed, arg)
+		}
+	}
+	return abi.ParseTopics(out, indexed, log.Topics[1:])
+}

bridge/utils/utils_test.go

@@ -29,13 +29,11 @@ func TestKeccak2(t *testing.T) {
 
 func TestComputeMessageHash(t *testing.T) {
 	hash := utils.ComputeMessageHash(
-		common.HexToAddress("0xd7227113b92e537aeda220d5a2f201b836e5879d"),
-		common.HexToAddress("0x47c02b023b6787ef4e503df42bbb1a94f451a1c0"),
-		big.NewInt(5000000000000000),
+		common.HexToAddress("0x1C5A77d9FA7eF466951B2F01F724BCa3A5820b63"),
+		common.HexToAddress("0x4592D8f8D7B001e72Cb26A73e4Fa1806a51aC79d"),
 		big.NewInt(0),
-		big.NewInt(1674204924),
-		common.Hex2Bytes("8eaac8a30000000000000000000000007138b17fc82d7e954b3bd2f98d8166d03e5e569b0000000000000000000000007138b17fc82d7e954b3bd2f98d8166d03e5e569b0000000000000000000000000000000000000000000000000011c37937e0800000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000000"),
-		big.NewInt(30706),
+		big.NewInt(1),
+		[]byte("testbridgecontract"),
 	)
-	assert.Equal(t, hash.String(), "0x920e59f62ca89a0f481d44961c55d299dd20c575693692d61fdf3ca579d8edf3")
+	assert.Equal(t, "0xda253c04595a49017bb54b1b46088c69752b5ad2f0c47971ac76b8b25abec202", hash.String())
 }

bridge/watcher/batch_proposer.go

@@ -0,0 +1,408 @@
+package watcher
+
+import (
+	"context"
+	"fmt"
+	"math"
+	"sync"
+	"time"
+
+	"github.com/scroll-tech/go-ethereum/log"
+	geth_metrics "github.com/scroll-tech/go-ethereum/metrics"
+
+	"scroll-tech/common/metrics"
+	"scroll-tech/common/types"
+
+	"scroll-tech/database"
+
+	bridgeabi "scroll-tech/bridge/abi"
+	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/relayer"
+)
+
+var (
+	bridgeL2BatchesGasOverThresholdTotalCounter = geth_metrics.NewRegisteredCounter("bridge/l2/batches/gas/over/threshold/total", metrics.ScrollRegistry)
+	bridgeL2BatchesTxsOverThresholdTotalCounter = geth_metrics.NewRegisteredCounter("bridge/l2/batches/txs/over/threshold/total", metrics.ScrollRegistry)
+	bridgeL2BatchesBlocksCreatedTotalCounter    = geth_metrics.NewRegisteredCounter("bridge/l2/batches/blocks/created/total", metrics.ScrollRegistry)
+	bridgeL2BatchesCommitsSentTotalCounter      = geth_metrics.NewRegisteredCounter("bridge/l2/batches/commits/sent/total", metrics.ScrollRegistry)
+
+	bridgeL2BatchesTxsCreatedPerBatchGauge = geth_metrics.NewRegisteredGauge("bridge/l2/batches/txs/created/per/batch", metrics.ScrollRegistry)
+	bridgeL2BatchesGasCreatedPerBatchGauge = geth_metrics.NewRegisteredGauge("bridge/l2/batches/gas/created/per/batch", metrics.ScrollRegistry)
+)
+
+// AddBatchInfoToDB inserts the batch information to the BlockBatch table and updates the batch_hash
+// in all blocks included in the batch.
+func AddBatchInfoToDB(db database.OrmFactory, batchData *types.BatchData) error {
+	dbTx, err := db.Beginx()
+	if err != nil {
+		return err
+	}
+
+	var dbTxErr error
+	defer func() {
+		if dbTxErr != nil {
+			if err := dbTx.Rollback(); err != nil {
+				log.Error("dbTx.Rollback()", "err", err)
+			}
+		}
+	}()
+
+	if dbTxErr = db.NewBatchInDBTx(dbTx, batchData); dbTxErr != nil {
+		return dbTxErr
+	}
+
+	var blockIDs = make([]uint64, len(batchData.Batch.Blocks))
+	for i, block := range batchData.Batch.Blocks {
+		blockIDs[i] = block.BlockNumber
+	}
+
+	if dbTxErr = db.SetBatchHashForL2BlocksInDBTx(dbTx, blockIDs, batchData.Hash().Hex()); dbTxErr != nil {
+		return dbTxErr
+	}
+
+	dbTxErr = dbTx.Commit()
+	return dbTxErr
+}
+
+// BatchProposer sends batches commit transactions to relayer.
+type BatchProposer struct {
+	mutex sync.Mutex
+
+	ctx context.Context
+	orm database.OrmFactory
+
+	batchTimeSec             uint64
+	batchGasThreshold        uint64
+	batchTxNumThreshold      uint64
+	batchBlocksLimit         uint64
+	batchCommitTimeSec       uint64
+	commitCalldataSizeLimit  uint64
+	batchDataBufferSizeLimit uint64
+	commitCalldataMinSize    uint64
+
+	proofGenerationFreq uint64
+	batchDataBuffer     []*types.BatchData
+	relayer             *relayer.Layer2Relayer
+
+	piCfg *types.PublicInputHashConfig
+}
+
+// NewBatchProposer will return a new instance of BatchProposer.
+func NewBatchProposer(ctx context.Context, cfg *config.BatchProposerConfig, relayer *relayer.Layer2Relayer, orm database.OrmFactory) *BatchProposer {
+	p := &BatchProposer{
+		mutex:                    sync.Mutex{},
+		ctx:                      ctx,
+		orm:                      orm,
+		batchTimeSec:             cfg.BatchTimeSec,
+		batchGasThreshold:        cfg.BatchGasThreshold,
+		batchTxNumThreshold:      cfg.BatchTxNumThreshold,
+		batchBlocksLimit:         cfg.BatchBlocksLimit,
+		batchCommitTimeSec:       cfg.BatchCommitTimeSec,
+		commitCalldataSizeLimit:  cfg.CommitTxCalldataSizeLimit,
+		commitCalldataMinSize:    cfg.CommitTxCalldataMinSize,
+		batchDataBufferSizeLimit: 100*cfg.CommitTxCalldataSizeLimit + 1*1024*1024, // @todo: determine the value.
+		proofGenerationFreq:      cfg.ProofGenerationFreq,
+		piCfg:                    cfg.PublicInputConfig,
+		relayer:                  relayer,
+	}
+
+	// for graceful restart.
+	p.recoverBatchDataBuffer()
+
+	// try to commit the leftover pending batches
+	p.TryCommitBatches()
+
+	return p
+}
+
+func (p *BatchProposer) recoverBatchDataBuffer() {
+	// batches are sorted by batch index in increasing order
+	batchHashes, err := p.orm.GetPendingBatches(math.MaxInt32)
+	if err != nil {
+		log.Crit("Failed to fetch pending L2 batches", "err", err)
+	}
+	if len(batchHashes) == 0 {
+		return
+	}
+	log.Info("Load pending batches into batchDataBuffer")
+
+	// helper function to cache and get BlockBatch from DB
+	blockBatchCache := make(map[string]*types.BlockBatch)
+	getBlockBatch := func(batchHash string) (*types.BlockBatch, error) {
+		if blockBatch, ok := blockBatchCache[batchHash]; ok {
+			return blockBatch, nil
+		}
+		blockBatches, err := p.orm.GetBlockBatches(map[string]interface{}{"hash": batchHash})
+		if err != nil || len(blockBatches) == 0 {
+			return nil, err
+		}
+		blockBatchCache[batchHash] = blockBatches[0]
+		return blockBatches[0], nil
+	}
+
+	// recover the in-memory batchData from DB
+	for _, batchHash := range batchHashes {
+		log.Info("recover batch data from pending batch", "batch_hash", batchHash)
+		blockBatch, err := getBlockBatch(batchHash)
+		if err != nil {
+			log.Error("could not get BlockBatch", "batch_hash", batchHash, "error", err)
+			continue
+		}
+
+		parentBatch, err := getBlockBatch(blockBatch.ParentHash)
+		if err != nil {
+			log.Error("could not get parent BlockBatch", "batch_hash", batchHash, "error", err)
+			continue
+		}
+
+		blockInfos, err := p.orm.GetL2BlockInfos(
+			map[string]interface{}{"batch_hash": batchHash},
+			"order by number ASC",
+		)
+
+		if err != nil {
+			log.Error("could not GetL2BlockInfos", "batch_hash", batchHash, "error", err)
+			continue
+		}
+		if len(blockInfos) != int(blockBatch.EndBlockNumber-blockBatch.StartBlockNumber+1) {
+			log.Error("the number of block info retrieved from DB mistmatches the batch info in the DB",
+				"len(blockInfos)", len(blockInfos),
+				"expected", blockBatch.EndBlockNumber-blockBatch.StartBlockNumber+1)
+			continue
+		}
+
+		batchData, err := p.generateBatchData(parentBatch, blockInfos)
+		if err != nil {
+			continue
+		}
+		if batchData.Hash().Hex() != batchHash {
+			log.Error("the hash from recovered batch data mismatches the DB entry",
+				"recovered_batch_hash", batchData.Hash().Hex(),
+				"expected", batchHash)
+			continue
+		}
+
+		p.batchDataBuffer = append(p.batchDataBuffer, batchData)
+	}
+}
+
+// TryProposeBatch will try to propose a batch.
+func (p *BatchProposer) TryProposeBatch() {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+
+	for p.getBatchDataBufferSize() < p.batchDataBufferSizeLimit {
+		blocks, err := p.orm.GetUnbatchedL2Blocks(
+			map[string]interface{}{},
+			fmt.Sprintf("order by number ASC LIMIT %d", p.batchBlocksLimit),
+		)
+		if err != nil {
+			log.Error("failed to get unbatched blocks", "err", err)
+			return
+		}
+
+		batchCreated := p.proposeBatch(blocks)
+
+		// while size of batchDataBuffer < commitCalldataMinSize,
+		// proposer keeps fetching and porposing batches.
+		if p.getBatchDataBufferSize() >= p.commitCalldataMinSize {
+			return
+		}
+
+		if !batchCreated {
+			// wait for watcher to insert l2 traces.
+			time.Sleep(time.Second)
+		}
+	}
+}
+
+// TryCommitBatches will try to commit the pending batches.
+func (p *BatchProposer) TryCommitBatches() {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+
+	if len(p.batchDataBuffer) == 0 {
+		return
+	}
+
+	// estimate the calldata length to determine whether to commit the pending batches
+	index := 0
+	commit := false
+	calldataByteLen := uint64(0)
+	for ; index < len(p.batchDataBuffer); index++ {
+		calldataByteLen += bridgeabi.GetBatchCalldataLength(&p.batchDataBuffer[index].Batch)
+		if calldataByteLen > p.commitCalldataSizeLimit {
+			commit = true
+			if index == 0 {
+				log.Warn(
+					"The calldata size of one batch is larger than the threshold",
+					"batch_hash", p.batchDataBuffer[0].Hash().Hex(),
+					"calldata_size", calldataByteLen,
+				)
+				index = 1
+			}
+			break
+		}
+	}
+	if !commit && p.batchDataBuffer[0].Timestamp()+p.batchCommitTimeSec > uint64(time.Now().Unix()) {
+		return
+	}
+
+	// Send commit tx for batchDataBuffer[0:index]
+	log.Info("Commit batches", "start_index", p.batchDataBuffer[0].Batch.BatchIndex,
+		"end_index", p.batchDataBuffer[index-1].Batch.BatchIndex)
+	err := p.relayer.SendCommitTx(p.batchDataBuffer[:index])
+	if err != nil {
+		// leave the retry to the next ticker
+		log.Error("SendCommitTx failed", "error", err)
+	} else {
+		// pop the processed batches from the buffer
+		bridgeL2BatchesCommitsSentTotalCounter.Inc(1)
+		p.batchDataBuffer = p.batchDataBuffer[index:]
+	}
+}
+
+func (p *BatchProposer) proposeBatch(blocks []*types.BlockInfo) bool {
+	if len(blocks) == 0 {
+		return false
+	}
+
+	approximatePayloadSize := func(hash string) (uint64, error) {
+		traces, err := p.orm.GetL2WrappedBlocks(map[string]interface{}{"hash": hash})
+		if err != nil {
+			return 0, err
+		}
+		if len(traces) != 1 {
+			return 0, fmt.Errorf("unexpected traces length, expected = 1, actual = %d", len(traces))
+		}
+		size := 0
+		for _, tx := range traces[0].Transactions {
+			size += len(tx.Data)
+		}
+		return uint64(size), nil
+	}
+
+	firstSize, err := approximatePayloadSize(blocks[0].Hash)
+	if err != nil {
+		log.Error("failed to create batch", "number", blocks[0].Number, "err", err)
+		return false
+	}
+
+	if firstSize > p.commitCalldataSizeLimit {
+		log.Warn("oversized payload even for only 1 block", "height", blocks[0].Number, "size", firstSize)
+		// note: we should probably fail here once we can ensure this will not happen
+		if err := p.createBatchForBlocks(blocks[:1]); err != nil {
+			log.Error("failed to create batch", "number", blocks[0].Number, "err", err)
+			return false
+		}
+		bridgeL2BatchesTxsCreatedPerBatchGauge.Update(int64(blocks[0].TxNum))
+		bridgeL2BatchesGasCreatedPerBatchGauge.Update(int64(blocks[0].GasUsed))
+		bridgeL2BatchesBlocksCreatedTotalCounter.Inc(1)
+		return true
+	}
+
+	if blocks[0].GasUsed > p.batchGasThreshold {
+		bridgeL2BatchesGasOverThresholdTotalCounter.Inc(1)
+		log.Warn("gas overflow even for only 1 block", "height", blocks[0].Number, "gas", blocks[0].GasUsed)
+		if err := p.createBatchForBlocks(blocks[:1]); err != nil {
+			log.Error("failed to create batch", "number", blocks[0].Number, "err", err)
+		} else {
+			bridgeL2BatchesTxsCreatedPerBatchGauge.Update(int64(blocks[0].TxNum))
+			bridgeL2BatchesGasCreatedPerBatchGauge.Update(int64(blocks[0].GasUsed))
+			bridgeL2BatchesBlocksCreatedTotalCounter.Inc(1)
+		}
+		return true
+	}
+
+	if blocks[0].TxNum > p.batchTxNumThreshold {
+		bridgeL2BatchesTxsOverThresholdTotalCounter.Inc(1)
+		log.Warn("too many txs even for only 1 block", "height", blocks[0].Number, "tx_num", blocks[0].TxNum)
+		if err := p.createBatchForBlocks(blocks[:1]); err != nil {
+			log.Error("failed to create batch", "number", blocks[0].Number, "err", err)
+		} else {
+			bridgeL2BatchesTxsCreatedPerBatchGauge.Update(int64(blocks[0].TxNum))
+			bridgeL2BatchesGasCreatedPerBatchGauge.Update(int64(blocks[0].GasUsed))
+			bridgeL2BatchesBlocksCreatedTotalCounter.Inc(1)
+		}
+		return true
+	}
+
+	var gasUsed, txNum, payloadSize uint64
+	reachThreshold := false
+	// add blocks into batch until reach batchGasThreshold
+	for i, block := range blocks {
+		size, err := approximatePayloadSize(block.Hash)
+		if err != nil {
+			log.Error("failed to create batch", "number", block.Number, "err", err)
+			return false
+		}
+
+		if (gasUsed+block.GasUsed > p.batchGasThreshold) || (txNum+block.TxNum > p.batchTxNumThreshold) || (payloadSize+size > p.commitCalldataSizeLimit) {
+			blocks = blocks[:i]
+			reachThreshold = true
+			break
+		}
+		gasUsed += block.GasUsed
+		txNum += block.TxNum
+		payloadSize += size
+	}
+
+	// if too few gas gathered, but we don't want to halt, we then check the first block in the batch:
+	// if it's not old enough we will skip proposing the batch,
+	// otherwise we will still propose a batch
+	if !reachThreshold && blocks[0].BlockTimestamp+p.batchTimeSec > uint64(time.Now().Unix()) {
+		return false
+	}
+
+	if err := p.createBatchForBlocks(blocks); err != nil {
+		log.Error("failed to create batch", "from", blocks[0].Number, "to", blocks[len(blocks)-1].Number, "err", err)
+	} else {
+		bridgeL2BatchesTxsCreatedPerBatchGauge.Update(int64(txNum))
+		bridgeL2BatchesGasCreatedPerBatchGauge.Update(int64(gasUsed))
+		bridgeL2BatchesBlocksCreatedTotalCounter.Inc(int64(len(blocks)))
+	}
+
+	return true
+}
+
+func (p *BatchProposer) createBatchForBlocks(blocks []*types.BlockInfo) error {
+	lastBatch, err := p.orm.GetLatestBatch()
+	if err != nil {
+		// We should not receive sql.ErrNoRows error. The DB should have the batch entry that contains the genesis block.
+		return err
+	}
+
+	batchData, err := p.generateBatchData(lastBatch, blocks)
+	if err != nil {
+		log.Error("createBatchData failed", "error", err)
+		return err
+	}
+
+	if err := AddBatchInfoToDB(p.orm, batchData); err != nil {
+		log.Error("addBatchInfoToDB failed", "BatchHash", batchData.Hash(), "error", err)
+		return err
+	}
+
+	p.batchDataBuffer = append(p.batchDataBuffer, batchData)
+	return nil
+}
+
+func (p *BatchProposer) generateBatchData(parentBatch *types.BlockBatch, blocks []*types.BlockInfo) (*types.BatchData, error) {
+	var wrappedBlocks []*types.WrappedBlock
+	for _, block := range blocks {
+		trs, err := p.orm.GetL2WrappedBlocks(map[string]interface{}{"hash": block.Hash})
+		if err != nil || len(trs) != 1 {
+			log.Error("Failed to GetBlockTraces", "hash", block.Hash, "err", err)
+			return nil, err
+		}
+		wrappedBlocks = append(wrappedBlocks, trs[0])
+	}
+	return types.NewBatchData(parentBatch, wrappedBlocks, p.piCfg), nil
+}
+
+func (p *BatchProposer) getBatchDataBufferSize() (size uint64) {
+	for _, batchData := range p.batchDataBuffer {
+		size += bridgeabi.GetBatchCalldataLength(&batchData.Batch)
+	}
+	return
+}

bridge/watcher/batch_proposer_test.go

@@ -0,0 +1,133 @@
+package watcher_test
+
+import (
+	"context"
+	"fmt"
+	"math"
+	"testing"
+
+	"github.com/scroll-tech/go-ethereum/common"
+	"github.com/stretchr/testify/assert"
+
+	"scroll-tech/database"
+	"scroll-tech/database/migrate"
+
+	"scroll-tech/bridge/config"
+	"scroll-tech/bridge/relayer"
+	"scroll-tech/bridge/watcher"
+
+	"scroll-tech/common/types"
+)
+
+func testBatchProposerProposeBatch(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	ctx := context.Background()
+	subCtx, cancel := context.WithCancel(ctx)
+
+	defer func() {
+		cancel()
+		db.Close()
+	}()
+
+	// Insert traces into db.
+	assert.NoError(t, db.InsertWrappedBlocks([]*types.WrappedBlock{wrappedBlock1}))
+
+	l2cfg := cfg.L2Config
+	wc := watcher.NewL2WatcherClient(context.Background(), l2Cli, l2cfg.Confirmations, l2cfg.L2MessengerAddress, l2cfg.L2MessageQueueAddress, l2cfg.WithdrawTrieRootSlot, db)
+	loopToFetchEvent(subCtx, wc)
+
+	batch, err := db.GetLatestBatch()
+	assert.NoError(t, err)
+
+	// Create a new batch.
+	batchData := types.NewBatchData(&types.BlockBatch{
+		Index:     0,
+		Hash:      batch.Hash,
+		StateRoot: batch.StateRoot,
+	}, []*types.WrappedBlock{wrappedBlock1}, nil)
+
+	relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Cli, db, cfg.L2Config.RelayerConfig)
+	assert.NoError(t, err)
+
+	proposer := watcher.NewBatchProposer(context.Background(), &config.BatchProposerConfig{
+		ProofGenerationFreq: 1,
+		BatchGasThreshold:   3000000,
+		BatchTxNumThreshold: 135,
+		BatchTimeSec:        1,
+		BatchBlocksLimit:    100,
+	}, relayer, db)
+	proposer.TryProposeBatch()
+
+	infos, err := db.GetUnbatchedL2Blocks(map[string]interface{}{},
+		fmt.Sprintf("order by number ASC LIMIT %d", 100))
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(infos))
+
+	exist, err := db.BatchRecordExist(batchData.Hash().Hex())
+	assert.NoError(t, err)
+	assert.Equal(t, true, exist)
+}
+
+func testBatchProposerGracefulRestart(t *testing.T) {
+	// Create db handler and reset db.
+	db, err := database.NewOrmFactory(cfg.DBConfig)
+	assert.NoError(t, err)
+	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
+	defer db.Close()
+
+	relayer, err := relayer.NewLayer2Relayer(context.Background(), l2Cli, db, cfg.L2Config.RelayerConfig)
+	assert.NoError(t, err)
+
+	// Insert traces into db.
+	assert.NoError(t, db.InsertWrappedBlocks([]*types.WrappedBlock{wrappedBlock2}))
+
+	// Insert block batch into db.
+	batchData1 := types.NewBatchData(&types.BlockBatch{
+		Index:     0,
+		Hash:      common.Hash{}.String(),
+		StateRoot: common.Hash{}.String(),
+	}, []*types.WrappedBlock{wrappedBlock1}, nil)
+
+	parentBatch2 := &types.BlockBatch{
+		Index:     batchData1.Batch.BatchIndex,
+		Hash:      batchData1.Hash().Hex(),
+		StateRoot: batchData1.Batch.NewStateRoot.String(),
+	}
+	batchData2 := types.NewBatchData(parentBatch2, []*types.WrappedBlock{wrappedBlock2}, nil)
+
+	dbTx, err := db.Beginx()
+	assert.NoError(t, err)
+	assert.NoError(t, db.NewBatchInDBTx(dbTx, batchData1))
+	assert.NoError(t, db.NewBatchInDBTx(dbTx, batchData2))
+	assert.NoError(t, db.SetBatchHashForL2BlocksInDBTx(dbTx, []uint64{
+		batchData1.Batch.Blocks[0].BlockNumber}, batchData1.Hash().Hex()))
+	assert.NoError(t, db.SetBatchHashForL2BlocksInDBTx(dbTx, []uint64{
+		batchData2.Batch.Blocks[0].BlockNumber}, batchData2.Hash().Hex()))
+	assert.NoError(t, dbTx.Commit())
+
+	assert.NoError(t, db.UpdateRollupStatus(context.Background(), batchData1.Hash().Hex(), types.RollupFinalized))
+
+	batchHashes, err := db.GetPendingBatches(math.MaxInt32)
+	assert.NoError(t, err)
+	assert.Equal(t, 1, len(batchHashes))
+	assert.Equal(t, batchData2.Hash().Hex(), batchHashes[0])
+	// test p.recoverBatchDataBuffer().
+	_ = watcher.NewBatchProposer(context.Background(), &config.BatchProposerConfig{
+		ProofGenerationFreq: 1,
+		BatchGasThreshold:   3000000,
+		BatchTxNumThreshold: 135,
+		BatchTimeSec:        1,
+		BatchBlocksLimit:    100,
+	}, relayer, db)
+
+	batchHashes, err = db.GetPendingBatches(math.MaxInt32)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(batchHashes))
+
+	exist, err := db.BatchRecordExist(batchData2.Hash().Hex())
+	assert.NoError(t, err)
+	assert.Equal(t, true, exist)
+}

bridge/watcher/common.go

@@ -0,0 +1,11 @@
+package watcher
+
+import "github.com/scroll-tech/go-ethereum/common"
+
+const contractEventsBlocksFetchLimit = int64(10)
+
+type relayedMessage struct {
+	msgHash      common.Hash
+	txHash       common.Hash
+	isSuccessful bool
+}

bridge/watcher/l1_watcher.go

@@ -0,0 +1,360 @@
+package watcher
+
+import (
+	"context"
+	"math/big"
+
+	geth "github.com/scroll-tech/go-ethereum"
+	"github.com/scroll-tech/go-ethereum/accounts/abi"
+	"github.com/scroll-tech/go-ethereum/common"
+	geth_types "github.com/scroll-tech/go-ethereum/core/types"
+	"github.com/scroll-tech/go-ethereum/crypto"
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/scroll-tech/go-ethereum/log"
+	geth_metrics "github.com/scroll-tech/go-ethereum/metrics"
+	"github.com/scroll-tech/go-ethereum/rpc"
+
+	"scroll-tech/common/metrics"
+	"scroll-tech/common/types"
+
+	"scroll-tech/database"
+
+	bridge_abi "scroll-tech/bridge/abi"
+	"scroll-tech/bridge/utils"
+)
+
+var (
+	bridgeL1MsgsSyncHeightGauge = geth_metrics.NewRegisteredGauge("bridge/l1/msgs/sync/height", metrics.ScrollRegistry)
+
+	bridgeL1MsgsSentEventsTotalCounter    = geth_metrics.NewRegisteredCounter("bridge/l1/msgs/sent/events/total", metrics.ScrollRegistry)
+	bridgeL1MsgsRelayedEventsTotalCounter = geth_metrics.NewRegisteredCounter("bridge/l1/msgs/relayed/events/total", metrics.ScrollRegistry)
+	bridgeL1MsgsRollupEventsTotalCounter  = geth_metrics.NewRegisteredCounter("bridge/l1/msgs/rollup/events/total", metrics.ScrollRegistry)
+)
+
+type rollupEvent struct {
+	batchHash common.Hash
+	txHash    common.Hash
+	status    types.RollupStatus
+}
+
+// L1WatcherClient will listen for smart contract events from Eth L1.
+type L1WatcherClient struct {
+	ctx    context.Context
+	client *ethclient.Client
+	db     database.OrmFactory
+
+	// The number of new blocks to wait for a block to be confirmed
+	confirmations rpc.BlockNumber
+
+	messengerAddress common.Address
+	messengerABI     *abi.ABI
+
+	messageQueueAddress common.Address
+	messageQueueABI     *abi.ABI
+
+	scrollChainAddress common.Address
+	scrollChainABI     *abi.ABI
+
+	// The height of the block that the watcher has retrieved event logs
+	processedMsgHeight uint64
+	// The height of the block that the watcher has retrieved header rlp
+	processedBlockHeight uint64
+}
+
+// NewL1WatcherClient returns a new instance of L1WatcherClient.
+func NewL1WatcherClient(ctx context.Context, client *ethclient.Client, startHeight uint64, confirmations rpc.BlockNumber, messengerAddress, messageQueueAddress, scrollChainAddress common.Address, db database.OrmFactory) *L1WatcherClient {
+	savedHeight, err := db.GetLayer1LatestWatchedHeight()
+	if err != nil {
+		log.Warn("Failed to fetch height from db", "err", err)
+		savedHeight = 0
+	}
+	if savedHeight < int64(startHeight) {
+		savedHeight = int64(startHeight)
+	}
+
+	savedL1BlockHeight, err := db.GetLatestL1BlockHeight()
+	if err != nil {
+		log.Warn("Failed to fetch latest L1 block height from db", "err", err)
+		savedL1BlockHeight = 0
+	}
+	if savedL1BlockHeight < startHeight {
+		savedL1BlockHeight = startHeight
+	}
+
+	return &L1WatcherClient{
+		ctx:           ctx,
+		client:        client,
+		db:            db,
+		confirmations: confirmations,
+
+		messengerAddress: messengerAddress,
+		messengerABI:     bridge_abi.L1ScrollMessengerABI,
+
+		messageQueueAddress: messageQueueAddress,
+		messageQueueABI:     bridge_abi.L1MessageQueueABI,
+
+		scrollChainAddress: scrollChainAddress,
+		scrollChainABI:     bridge_abi.ScrollChainABI,
+
+		processedMsgHeight:   uint64(savedHeight),
+		processedBlockHeight: savedL1BlockHeight,
+	}
+}
+
+// FetchBlockHeader pull latest L1 blocks and save in DB
+func (w *L1WatcherClient) FetchBlockHeader(blockHeight uint64) error {
+	fromBlock := int64(w.processedBlockHeight) + 1
+	toBlock := int64(blockHeight)
+	if toBlock < fromBlock {
+		return nil
+	}
+	if toBlock > fromBlock+contractEventsBlocksFetchLimit {
+		toBlock = fromBlock + contractEventsBlocksFetchLimit - 1
+	}
+
+	var blocks []*types.L1BlockInfo
+	var err error
+	height := fromBlock
+	for ; height <= toBlock; height++ {
+		var block *geth_types.Header
+		block, err = w.client.HeaderByNumber(w.ctx, big.NewInt(height))
+		if err != nil {
+			log.Warn("Failed to get block", "height", height, "err", err)
+			break
+		}
+		blocks = append(blocks, &types.L1BlockInfo{
+			Number:  uint64(height),
+			Hash:    block.Hash().String(),
+			BaseFee: block.BaseFee.Uint64(),
+		})
+	}
+
+	// failed at first block, return with the error
+	if height == fromBlock {
+		return err
+	}
+	toBlock = height - 1
+
+	// insert succeed blocks
+	err = w.db.InsertL1Blocks(w.ctx, blocks)
+	if err != nil {
+		log.Warn("Failed to insert L1 block to db", "fromBlock", fromBlock, "toBlock", toBlock, "err", err)
+		return err
+	}
+
+	// update processed height
+	w.processedBlockHeight = uint64(toBlock)
+	return nil
+}
+
+// FetchContractEvent pull latest event logs from given contract address and save in DB
+func (w *L1WatcherClient) FetchContractEvent() error {
+	defer func() {
+		log.Info("l1 watcher fetchContractEvent", "w.processedMsgHeight", w.processedMsgHeight)
+	}()
+	blockHeight, err := utils.GetLatestConfirmedBlockNumber(w.ctx, w.client, w.confirmations)
+	if err != nil {
+		log.Error("failed to get block number", "err", err)
+		return err
+	}
+
+	fromBlock := int64(w.processedMsgHeight) + 1
+	toBlock := int64(blockHeight)
+
+	for from := fromBlock; from <= toBlock; from += contractEventsBlocksFetchLimit {
+		to := from + contractEventsBlocksFetchLimit - 1
+
+		if to > toBlock {
+			to = toBlock
+		}
+
+		// warning: uint int conversion...
+		query := geth.FilterQuery{
+			FromBlock: big.NewInt(from), // inclusive
+			ToBlock:   big.NewInt(to),   // inclusive
+			Addresses: []common.Address{
+				w.messengerAddress,
+				w.scrollChainAddress,
+				w.messageQueueAddress,
+			},
+			Topics: make([][]common.Hash, 1),
+		}
+		query.Topics[0] = make([]common.Hash, 5)
+		query.Topics[0][0] = bridge_abi.L1QueueTransactionEventSignature
+		query.Topics[0][1] = bridge_abi.L1RelayedMessageEventSignature
+		query.Topics[0][2] = bridge_abi.L1FailedRelayedMessageEventSignature
+		query.Topics[0][3] = bridge_abi.L1CommitBatchEventSignature
+		query.Topics[0][4] = bridge_abi.L1FinalizeBatchEventSignature
+
+		logs, err := w.client.FilterLogs(w.ctx, query)
+		if err != nil {
+			log.Warn("Failed to get event logs", "err", err)
+			return err
+		}
+		if len(logs) == 0 {
+			w.processedMsgHeight = uint64(to)
+			bridgeL1MsgsSyncHeightGauge.Update(to)
+			continue
+		}
+		log.Info("Received new L1 events", "fromBlock", from, "toBlock", to, "cnt", len(logs))
+
+		sentMessageEvents, relayedMessageEvents, rollupEvents, err := w.parseBridgeEventLogs(logs)
+		if err != nil {
+			log.Error("Failed to parse emitted events log", "err", err)
+			return err
+		}
+		sentMessageCount := int64(len(sentMessageEvents))
+		relayedMessageCount := int64(len(relayedMessageEvents))
+		rollupEventCount := int64(len(rollupEvents))
+		bridgeL1MsgsSentEventsTotalCounter.Inc(sentMessageCount)
+		bridgeL1MsgsRelayedEventsTotalCounter.Inc(relayedMessageCount)
+		bridgeL1MsgsRollupEventsTotalCounter.Inc(rollupEventCount)
+		log.Info("L1 events types", "SentMessageCount", sentMessageCount, "RelayedMessageCount", relayedMessageCount, "RollupEventCount", rollupEventCount)
+
+		// use rollup event to update rollup results db status
+		var batchHashes []string
+		for _, event := range rollupEvents {
+			batchHashes = append(batchHashes, event.batchHash.String())
+		}
+		statuses, err := w.db.GetRollupStatusByHashList(batchHashes)
+		if err != nil {
+			log.Error("Failed to GetRollupStatusByHashList", "err", err)
+			return err
+		}
+		if len(statuses) != len(batchHashes) {
+			log.Error("RollupStatus.Length mismatch with batchHashes.Length", "RollupStatus.Length", len(statuses), "batchHashes.Length", len(batchHashes))
+			return nil
+		}
+
+		for index, event := range rollupEvents {
+			batchHash := event.batchHash.String()
+			status := statuses[index]
+			// only update when db status is before event status
+			if event.status > status {
+				if event.status == types.RollupFinalized {
+					err = w.db.UpdateFinalizeTxHashAndRollupStatus(w.ctx, batchHash, event.txHash.String(), event.status)
+				} else if event.status == types.RollupCommitted {
+					err = w.db.UpdateCommitTxHashAndRollupStatus(w.ctx, batchHash, event.txHash.String(), event.status)
+				}
+				if err != nil {
+					log.Error("Failed to update Rollup/Finalize TxHash and Status", "err", err)
+					return err
+				}
+			}
+		}
+
+		// Update relayed message first to make sure we don't forget to update submitted message.
+		// Since, we always start sync from the latest unprocessed message.
+		for _, msg := range relayedMessageEvents {
+			var msgStatus types.MsgStatus
+			if msg.isSuccessful {
+				msgStatus = types.MsgConfirmed
+			} else {
+				msgStatus = types.MsgFailed
+			}
+			if err = w.db.UpdateLayer2StatusAndLayer1Hash(w.ctx, msg.msgHash.String(), msgStatus, msg.txHash.String()); err != nil {
+				log.Error("Failed to update layer1 status and layer2 hash", "err", err)
+				return err
+			}
+		}
+
+		if err = w.db.SaveL1Messages(w.ctx, sentMessageEvents); err != nil {
+			return err
+		}
+
+		w.processedMsgHeight = uint64(to)
+		bridgeL1MsgsSyncHeightGauge.Update(to)
+	}
+
+	return nil
+}
+
+func (w *L1WatcherClient) parseBridgeEventLogs(logs []geth_types.Log) ([]*types.L1Message, []relayedMessage, []rollupEvent, error) {
+	// Need use contract abi to parse event Log
+	// Can only be tested after we have our contracts set up
+
+	var l1Messages []*types.L1Message
+	var relayedMessages []relayedMessage
+	var rollupEvents []rollupEvent
+	for _, vLog := range logs {
+		switch vLog.Topics[0] {
+		case bridge_abi.L1QueueTransactionEventSignature:
+			event := bridge_abi.L1QueueTransactionEvent{}
+			err := utils.UnpackLog(w.messageQueueABI, &event, "QueueTransaction", vLog)
+			if err != nil {
+				log.Warn("Failed to unpack layer1 QueueTransaction event", "err", err)
+				return l1Messages, relayedMessages, rollupEvents, err
+			}
+
+			msgHash := common.BytesToHash(crypto.Keccak256(event.Data))
+
+			l1Messages = append(l1Messages, &types.L1Message{
+				QueueIndex: event.QueueIndex.Uint64(),
+				MsgHash:    msgHash.String(),
+				Height:     vLog.BlockNumber,
+				Sender:     event.Sender.String(),
+				Value:      event.Value.String(),
+				Target:     event.Target.String(),
+				Calldata:   common.Bytes2Hex(event.Data),
+				GasLimit:   event.GasLimit.Uint64(),
+				Layer1Hash: vLog.TxHash.Hex(),
+			})
+		case bridge_abi.L1RelayedMessageEventSignature:
+			event := bridge_abi.L1RelayedMessageEvent{}
+			err := utils.UnpackLog(w.messengerABI, &event, "RelayedMessage", vLog)
+			if err != nil {
+				log.Warn("Failed to unpack layer1 RelayedMessage event", "err", err)
+				return l1Messages, relayedMessages, rollupEvents, err
+			}
+
+			relayedMessages = append(relayedMessages, relayedMessage{
+				msgHash:      event.MessageHash,
+				txHash:       vLog.TxHash,
+				isSuccessful: true,
+			})
+		case bridge_abi.L1FailedRelayedMessageEventSignature:
+			event := bridge_abi.L1FailedRelayedMessageEvent{}
+			err := utils.UnpackLog(w.messengerABI, &event, "FailedRelayedMessage", vLog)
+			if err != nil {
+				log.Warn("Failed to unpack layer1 FailedRelayedMessage event", "err", err)
+				return l1Messages, relayedMessages, rollupEvents, err
+			}
+
+			relayedMessages = append(relayedMessages, relayedMessage{
+				msgHash:      event.MessageHash,
+				txHash:       vLog.TxHash,
+				isSuccessful: false,
+			})
+		case bridge_abi.L1CommitBatchEventSignature:
+			event := bridge_abi.L1CommitBatchEvent{}
+			err := utils.UnpackLog(w.scrollChainABI, &event, "CommitBatch", vLog)
+			if err != nil {
+				log.Warn("Failed to unpack layer1 CommitBatch event", "err", err)
+				return l1Messages, relayedMessages, rollupEvents, err
+			}
+
+			rollupEvents = append(rollupEvents, rollupEvent{
+				batchHash: event.BatchHash,
+				txHash:    vLog.TxHash,
+				status:    types.RollupCommitted,
+			})
+		case bridge_abi.L1FinalizeBatchEventSignature:
+			event := bridge_abi.L1FinalizeBatchEvent{}
+			err := utils.UnpackLog(w.scrollChainABI, &event, "FinalizeBatch", vLog)
+			if err != nil {
+				log.Warn("Failed to unpack layer1 FinalizeBatch event", "err", err)
+				return l1Messages, relayedMessages, rollupEvents, err
+			}
+
+			rollupEvents = append(rollupEvents, rollupEvent{
+				batchHash: event.BatchHash,
+				txHash:    vLog.TxHash,
+				status:    types.RollupFinalized,
+			})
+		default:
+			log.Error("Unknown event", "topic", vLog.Topics[0], "txHash", vLog.TxHash)
+		}
+	}
+
+	return l1Messages, relayedMessages, rollupEvents, nil
+}

bridge/watcher/l1_watcher_test.go

@@ -1,4 +1,4 @@
-package l1
+package watcher_test
 
 import (
 	"context"
@@ -9,6 +9,8 @@ import (
 
 	"scroll-tech/database"
 	"scroll-tech/database/migrate"
+
+	"scroll-tech/bridge/watcher"
 )
 
 func testStartWatcher(t *testing.T) {
@@ -18,12 +20,11 @@ func testStartWatcher(t *testing.T) {
 	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
 	defer db.Close()
 
-	client, err := ethclient.Dial(l1gethImg.Endpoint())
+	client, err := ethclient.Dial(base.L1gethImg.Endpoint())
 	assert.NoError(t, err)
 
 	l1Cfg := cfg.L1Config
 
-	watcher := NewWatcher(context.Background(), client, l1Cfg.StartHeight, l1Cfg.Confirmations, l1Cfg.L1MessengerAddress, l1Cfg.RelayerConfig.RollupContractAddress, db)
-	watcher.Start()
-	defer watcher.Stop()
+	watcher := watcher.NewL1WatcherClient(context.Background(), client, l1Cfg.StartHeight, l1Cfg.Confirmations, l1Cfg.L1MessengerAddress, l1Cfg.L1MessageQueueAddress, l1Cfg.RelayerConfig.RollupContractAddress, db)
+	assert.NoError(t, watcher.FetchContractEvent())
 }

bridge/watcher/l2_watcher.go

@@ -0,0 +1,406 @@
+package watcher
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"math/big"
+
+	geth "github.com/scroll-tech/go-ethereum"
+	"github.com/scroll-tech/go-ethereum/accounts/abi"
+	"github.com/scroll-tech/go-ethereum/common"
+	"github.com/scroll-tech/go-ethereum/common/hexutil"
+	geth_types "github.com/scroll-tech/go-ethereum/core/types"
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/scroll-tech/go-ethereum/event"
+	"github.com/scroll-tech/go-ethereum/log"
+	geth_metrics "github.com/scroll-tech/go-ethereum/metrics"
+	"github.com/scroll-tech/go-ethereum/rpc"
+
+	"scroll-tech/common/metrics"
+	"scroll-tech/common/types"
+
+	"scroll-tech/database"
+
+	bridge_abi "scroll-tech/bridge/abi"
+	"scroll-tech/bridge/utils"
+)
+
+// Metrics
+var (
+	bridgeL2MsgsSyncHeightGauge      = geth_metrics.NewRegisteredGauge("bridge/l2/msgs/sync/height", metrics.ScrollRegistry)
+	bridgeL2BlocksFetchedHeightGauge = geth_metrics.NewRegisteredGauge("bridge/l2/blocks/fetched/height", metrics.ScrollRegistry)
+	bridgeL2BlocksFetchedGapGauge    = geth_metrics.NewRegisteredGauge("bridge/l2/blocks/fetched/gap", metrics.ScrollRegistry)
+
+	bridgeL2MsgsSentEventsTotalCounter    = geth_metrics.NewRegisteredCounter("bridge/l2/msgs/sent/events/total", metrics.ScrollRegistry)
+	bridgeL2MsgsAppendEventsTotalCounter  = geth_metrics.NewRegisteredCounter("bridge/l2/msgs/append/events/total", metrics.ScrollRegistry)
+	bridgeL2MsgsRelayedEventsTotalCounter = geth_metrics.NewRegisteredCounter("bridge/l2/msgs/relayed/events/total", metrics.ScrollRegistry)
+)
+
+// L2WatcherClient provide APIs which support others to subscribe to various event from l2geth
+type L2WatcherClient struct {
+	ctx context.Context
+	event.Feed
+
+	*ethclient.Client
+
+	orm database.OrmFactory
+
+	confirmations rpc.BlockNumber
+
+	messengerAddress common.Address
+	messengerABI     *abi.ABI
+
+	messageQueueAddress  common.Address
+	messageQueueABI      *abi.ABI
+	withdrawTrieRootSlot common.Hash
+
+	// The height of the block that the watcher has retrieved event logs
+	processedMsgHeight uint64
+
+	stopped uint64
+}
+
+// NewL2WatcherClient take a l2geth instance to generate a l2watcherclient instance
+func NewL2WatcherClient(ctx context.Context, client *ethclient.Client, confirmations rpc.BlockNumber, messengerAddress, messageQueueAddress common.Address, withdrawTrieRootSlot common.Hash, orm database.OrmFactory) *L2WatcherClient {
+	savedHeight, err := orm.GetLayer2LatestWatchedHeight()
+	if err != nil {
+		log.Warn("fetch height from db failed", "err", err)
+		savedHeight = 0
+	}
+
+	w := L2WatcherClient{
+		ctx:                ctx,
+		Client:             client,
+		orm:                orm,
+		processedMsgHeight: uint64(savedHeight),
+		confirmations:      confirmations,
+
+		messengerAddress: messengerAddress,
+		messengerABI:     bridge_abi.L2ScrollMessengerABI,
+
+		messageQueueAddress:  messageQueueAddress,
+		messageQueueABI:      bridge_abi.L2MessageQueueABI,
+		withdrawTrieRootSlot: withdrawTrieRootSlot,
+
+		stopped: 0,
+	}
+
+	// Initialize genesis before we do anything else
+	if err := w.initializeGenesis(); err != nil {
+		panic(fmt.Sprintf("failed to initialize L2 genesis batch, err: %v", err))
+	}
+
+	return &w
+}
+
+func (w *L2WatcherClient) initializeGenesis() error {
+	if count, err := w.orm.GetBatchCount(); err != nil {
+		return fmt.Errorf("failed to get batch count: %v", err)
+	} else if count > 0 {
+		log.Info("genesis already imported")
+		return nil
+	}
+
+	genesis, err := w.HeaderByNumber(w.ctx, big.NewInt(0))
+	if err != nil {
+		return fmt.Errorf("failed to retrieve L2 genesis header: %v", err)
+	}
+
+	log.Info("retrieved L2 genesis header", "hash", genesis.Hash().String())
+
+	blockTrace := &types.WrappedBlock{Header: genesis, Transactions: nil, WithdrawTrieRoot: common.Hash{}}
+	batchData := types.NewGenesisBatchData(blockTrace)
+
+	if err = AddBatchInfoToDB(w.orm, batchData); err != nil {
+		log.Error("failed to add batch info to DB", "BatchHash", batchData.Hash(), "error", err)
+		return err
+	}
+
+	batchHash := batchData.Hash().Hex()
+
+	if err = w.orm.UpdateProvingStatus(batchHash, types.ProvingTaskProved); err != nil {
+		return fmt.Errorf("failed to update genesis batch proving status: %v", err)
+	}
+
+	if err = w.orm.UpdateRollupStatus(w.ctx, batchHash, types.RollupFinalized); err != nil {
+		return fmt.Errorf("failed to update genesis batch rollup status: %v", err)
+	}
+
+	log.Info("successfully imported genesis batch")
+
+	return nil
+}
+
+const blockTracesFetchLimit = uint64(10)
+
+// TryFetchRunningMissingBlocks try fetch missing blocks if inconsistent
+func (w *L2WatcherClient) TryFetchRunningMissingBlocks(ctx context.Context, blockHeight uint64) {
+	// Get newest block in DB. must have blocks at that time.
+	// Don't use "block_trace" table "trace" column's BlockTrace.Number,
+	// because it might be empty if the corresponding rollup_result is finalized/finalization_skipped
+	heightInDB, err := w.orm.GetL2BlocksLatestHeight()
+	if err != nil {
+		log.Error("failed to GetL2BlocksLatestHeight", "err", err)
+		return
+	}
+
+	// Can't get trace from genesis block, so the default start number is 1.
+	var from = uint64(1)
+	if heightInDB > 0 {
+		from = uint64(heightInDB) + 1
+	}
+
+	for ; from <= blockHeight; from += blockTracesFetchLimit {
+		to := from + blockTracesFetchLimit - 1
+
+		if to > blockHeight {
+			to = blockHeight
+		}
+
+		// Get block traces and insert into db.
+		if err = w.getAndStoreBlockTraces(ctx, from, to); err != nil {
+			log.Error("fail to getAndStoreBlockTraces", "from", from, "to", to, "err", err)
+			return
+		}
+		bridgeL2BlocksFetchedHeightGauge.Update(int64(to))
+		bridgeL2BlocksFetchedGapGauge.Update(int64(blockHeight - to))
+	}
+}
+
+func txsToTxsData(txs geth_types.Transactions) []*geth_types.TransactionData {
+	txsData := make([]*geth_types.TransactionData, len(txs))
+	for i, tx := range txs {
+		v, r, s := tx.RawSignatureValues()
+		txsData[i] = &geth_types.TransactionData{
+			Type:     tx.Type(),
+			TxHash:   tx.Hash().String(),
+			Nonce:    tx.Nonce(),
+			ChainId:  (*hexutil.Big)(tx.ChainId()),
+			Gas:      tx.Gas(),
+			GasPrice: (*hexutil.Big)(tx.GasPrice()),
+			To:       tx.To(),
+			Value:    (*hexutil.Big)(tx.Value()),
+			Data:     hexutil.Encode(tx.Data()),
+			IsCreate: tx.To() == nil,
+			V:        (*hexutil.Big)(v),
+			R:        (*hexutil.Big)(r),
+			S:        (*hexutil.Big)(s),
+		}
+	}
+	return txsData
+}
+
+func (w *L2WatcherClient) getAndStoreBlockTraces(ctx context.Context, from, to uint64) error {
+	var blocks []*types.WrappedBlock
+
+	for number := from; number <= to; number++ {
+		log.Debug("retrieving block", "height", number)
+		block, err2 := w.BlockByNumber(ctx, big.NewInt(int64(number)))
+		if err2 != nil {
+			return fmt.Errorf("failed to GetBlockByNumber: %v. number: %v", err2, number)
+		}
+
+		log.Info("retrieved block", "height", block.Header().Number, "hash", block.Header().Hash().String())
+
+		withdrawTrieRoot, err3 := w.StorageAt(ctx, w.messageQueueAddress, w.withdrawTrieRootSlot, big.NewInt(int64(number)))
+		if err3 != nil {
+			return fmt.Errorf("failed to get withdrawTrieRoot: %v. number: %v", err3, number)
+		}
+
+		blocks = append(blocks, &types.WrappedBlock{
+			Header:           block.Header(),
+			Transactions:     txsToTxsData(block.Transactions()),
+			WithdrawTrieRoot: common.BytesToHash(withdrawTrieRoot),
+		})
+	}
+
+	if len(blocks) > 0 {
+		if err := w.orm.InsertWrappedBlocks(blocks); err != nil {
+			return fmt.Errorf("failed to batch insert BlockTraces: %v", err)
+		}
+	}
+
+	return nil
+}
+
+// FetchContractEvent pull latest event logs from given contract address and save in DB
+func (w *L2WatcherClient) FetchContractEvent() {
+	defer func() {
+		log.Info("l2 watcher fetchContractEvent", "w.processedMsgHeight", w.processedMsgHeight)
+	}()
+
+	blockHeight, err := utils.GetLatestConfirmedBlockNumber(w.ctx, w.Client, w.confirmations)
+	if err != nil {
+		log.Error("failed to get block number", "err", err)
+		return
+	}
+
+	fromBlock := int64(w.processedMsgHeight) + 1
+	toBlock := int64(blockHeight)
+
+	for from := fromBlock; from <= toBlock; from += contractEventsBlocksFetchLimit {
+		to := from + contractEventsBlocksFetchLimit - 1
+
+		if to > toBlock {
+			to = toBlock
+		}
+
+		// warning: uint int conversion...
+		query := geth.FilterQuery{
+			FromBlock: big.NewInt(from), // inclusive
+			ToBlock:   big.NewInt(to),   // inclusive
+			Addresses: []common.Address{
+				w.messengerAddress,
+				w.messageQueueAddress,
+			},
+			Topics: make([][]common.Hash, 1),
+		}
+		query.Topics[0] = make([]common.Hash, 4)
+		query.Topics[0][0] = bridge_abi.L2SentMessageEventSignature
+		query.Topics[0][1] = bridge_abi.L2RelayedMessageEventSignature
+		query.Topics[0][2] = bridge_abi.L2FailedRelayedMessageEventSignature
+		query.Topics[0][3] = bridge_abi.L2AppendMessageEventSignature
+
+		logs, err := w.FilterLogs(w.ctx, query)
+		if err != nil {
+			log.Error("failed to get event logs", "err", err)
+			return
+		}
+		if len(logs) == 0 {
+			w.processedMsgHeight = uint64(to)
+			bridgeL2MsgsSyncHeightGauge.Update(to)
+			continue
+		}
+		log.Info("received new L2 messages", "fromBlock", from, "toBlock", to, "cnt", len(logs))
+
+		sentMessageEvents, relayedMessageEvents, err := w.parseBridgeEventLogs(logs)
+		if err != nil {
+			log.Error("failed to parse emitted event log", "err", err)
+			return
+		}
+
+		sentMessageCount := int64(len(sentMessageEvents))
+		relayedMessageCount := int64(len(relayedMessageEvents))
+		bridgeL2MsgsSentEventsTotalCounter.Inc(sentMessageCount)
+		bridgeL2MsgsRelayedEventsTotalCounter.Inc(relayedMessageCount)
+		log.Info("L2 events types", "SentMessageCount", sentMessageCount, "RelayedMessageCount", relayedMessageCount)
+
+		// Update relayed message first to make sure we don't forget to update submited message.
+		// Since, we always start sync from the latest unprocessed message.
+		for _, msg := range relayedMessageEvents {
+			var msgStatus types.MsgStatus
+			if msg.isSuccessful {
+				msgStatus = types.MsgConfirmed
+			} else {
+				msgStatus = types.MsgFailed
+			}
+			if err = w.orm.UpdateLayer1StatusAndLayer2Hash(w.ctx, msg.msgHash.String(), msgStatus, msg.txHash.String()); err != nil {
+				log.Error("Failed to update layer1 status and layer2 hash", "err", err)
+				return
+			}
+		}
+
+		if err = w.orm.SaveL2Messages(w.ctx, sentMessageEvents); err != nil {
+			log.Error("failed to save l2 messages", "err", err)
+			return
+		}
+
+		w.processedMsgHeight = uint64(to)
+		bridgeL2MsgsSyncHeightGauge.Update(to)
+	}
+}
+
+func (w *L2WatcherClient) parseBridgeEventLogs(logs []geth_types.Log) ([]*types.L2Message, []relayedMessage, error) {
+	// Need use contract abi to parse event Log
+	// Can only be tested after we have our contracts set up
+
+	var l2Messages []*types.L2Message
+	var relayedMessages []relayedMessage
+	var lastAppendMsgHash common.Hash
+	var lastAppendMsgNonce uint64
+	for _, vLog := range logs {
+		switch vLog.Topics[0] {
+		case bridge_abi.L2SentMessageEventSignature:
+			event := bridge_abi.L2SentMessageEvent{}
+			err := utils.UnpackLog(w.messengerABI, &event, "SentMessage", vLog)
+			if err != nil {
+				log.Error("failed to unpack layer2 SentMessage event", "err", err)
+				return l2Messages, relayedMessages, err
+			}
+
+			computedMsgHash := utils.ComputeMessageHash(
+				event.Sender,
+				event.Target,
+				event.Value,
+				event.MessageNonce,
+				event.Message,
+			)
+
+			// `AppendMessage` event is always emitted before `SentMessage` event
+			// So they should always match, just double check
+			if event.MessageNonce.Uint64() != lastAppendMsgNonce {
+				errMsg := fmt.Sprintf("l2 message nonces mismatch: AppendMessage.nonce=%v, SentMessage.nonce=%v, tx_hash=%v",
+					lastAppendMsgNonce, event.MessageNonce.Uint64(), vLog.TxHash.Hex())
+				return l2Messages, relayedMessages, errors.New(errMsg)
+			}
+			if computedMsgHash != lastAppendMsgHash {
+				errMsg := fmt.Sprintf("l2 message hashes mismatch: AppendMessage.msg_hash=%v, SentMessage.msg_hash=%v, tx_hash=%v",
+					lastAppendMsgHash.Hex(), computedMsgHash.Hex(), vLog.TxHash.Hex())
+				return l2Messages, relayedMessages, errors.New(errMsg)
+			}
+
+			l2Messages = append(l2Messages, &types.L2Message{
+				Nonce:      event.MessageNonce.Uint64(),
+				MsgHash:    computedMsgHash.String(),
+				Height:     vLog.BlockNumber,
+				Sender:     event.Sender.String(),
+				Value:      event.Value.String(),
+				Target:     event.Target.String(),
+				Calldata:   common.Bytes2Hex(event.Message),
+				Layer2Hash: vLog.TxHash.Hex(),
+			})
+		case bridge_abi.L2RelayedMessageEventSignature:
+			event := bridge_abi.L2RelayedMessageEvent{}
+			err := utils.UnpackLog(w.messengerABI, &event, "RelayedMessage", vLog)
+			if err != nil {
+				log.Warn("Failed to unpack layer2 RelayedMessage event", "err", err)
+				return l2Messages, relayedMessages, err
+			}
+
+			relayedMessages = append(relayedMessages, relayedMessage{
+				msgHash:      event.MessageHash,
+				txHash:       vLog.TxHash,
+				isSuccessful: true,
+			})
+		case bridge_abi.L2FailedRelayedMessageEventSignature:
+			event := bridge_abi.L2FailedRelayedMessageEvent{}
+			err := utils.UnpackLog(w.messengerABI, &event, "FailedRelayedMessage", vLog)
+			if err != nil {
+				log.Warn("Failed to unpack layer2 FailedRelayedMessage event", "err", err)
+				return l2Messages, relayedMessages, err
+			}
+
+			relayedMessages = append(relayedMessages, relayedMessage{
+				msgHash:      event.MessageHash,
+				txHash:       vLog.TxHash,
+				isSuccessful: false,
+			})
+		case bridge_abi.L2AppendMessageEventSignature:
+			event := bridge_abi.L2AppendMessageEvent{}
+			err := utils.UnpackLog(w.messageQueueABI, &event, "AppendMessage", vLog)
+			if err != nil {
+				log.Warn("Failed to unpack layer2 AppendMessage event", "err", err)
+				return l2Messages, relayedMessages, err
+			}
+
+			lastAppendMsgHash = event.MessageHash
+			lastAppendMsgNonce = event.Index.Uint64()
+			bridgeL2MsgsAppendEventsTotalCounter.Inc(1)
+		default:
+			log.Error("Unknown event", "topic", vLog.Topics[0], "txHash", vLog.TxHash)
+		}
+	}
+
+	return l2Messages, relayedMessages, nil
+}

bridge/watcher/l2_watcher_test.go

@@ -1,4 +1,4 @@
-package l2
+package watcher_test
 
 import (
 	"context"
@@ -10,18 +10,21 @@ import (
 
 	"github.com/scroll-tech/go-ethereum/accounts/abi/bind"
 	"github.com/scroll-tech/go-ethereum/common"
-	"github.com/scroll-tech/go-ethereum/core/types"
+	geth_types "github.com/scroll-tech/go-ethereum/core/types"
 	"github.com/scroll-tech/go-ethereum/ethclient"
 	"github.com/scroll-tech/go-ethereum/rpc"
 	"github.com/stretchr/testify/assert"
 
-	"scroll-tech/bridge/config"
+	"scroll-tech/common/types"
+
 	"scroll-tech/bridge/mock_bridge"
 	"scroll-tech/bridge/sender"
+	"scroll-tech/bridge/watcher"
+
+	cutils "scroll-tech/common/utils"
 
 	"scroll-tech/database"
 	"scroll-tech/database/migrate"
-	"scroll-tech/database/orm"
 )
 
 func testCreateNewWatcherAndStop(t *testing.T) {
@@ -29,12 +32,16 @@ func testCreateNewWatcherAndStop(t *testing.T) {
 	l2db, err := database.NewOrmFactory(cfg.DBConfig)
 	assert.NoError(t, err)
 	assert.NoError(t, migrate.ResetDB(l2db.GetDB().DB))
-	defer l2db.Close()
+	ctx := context.Background()
+	subCtx, cancel := context.WithCancel(ctx)
+	defer func() {
+		cancel()
+		l2db.Close()
+	}()
 
 	l2cfg := cfg.L2Config
-	rc := NewL2WatcherClient(context.Background(), l2Cli, l2cfg.Confirmations, l2cfg.BatchProposerConfig, l2cfg.L2MessengerAddress, l2db)
-	rc.Start()
-	defer rc.Stop()
+	rc := watcher.NewL2WatcherClient(context.Background(), l2Cli, l2cfg.Confirmations, l2cfg.L2MessengerAddress, l2cfg.L2MessageQueueAddress, l2cfg.WithdrawTrieRootSlot, l2db)
+	loopToFetchEvent(subCtx, rc)
 
 	l1cfg := cfg.L1Config
 	l1cfg.RelayerConfig.SenderConfig.Confirmations = rpc.LatestBlockNumber
@@ -45,7 +52,7 @@ func testCreateNewWatcherAndStop(t *testing.T) {
 	numTransactions := 3
 	toAddress := common.HexToAddress("0x4592d8f8d7b001e72cb26a73e4fa1806a51ac79d")
 	for i := 0; i < numTransactions; i++ {
-		_, err = newSender.SendTransaction(strconv.Itoa(1000+i), &toAddress, big.NewInt(1000000000), nil)
+		_, err = newSender.SendTransaction(strconv.Itoa(1000+i), &toAddress, big.NewInt(1000000000), nil, 0)
 		assert.NoError(t, err)
 		<-newSender.ConfirmChan()
 	}
@@ -60,7 +67,17 @@ func testMonitorBridgeContract(t *testing.T) {
 	db, err := database.NewOrmFactory(cfg.DBConfig)
 	assert.NoError(t, err)
 	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
-	defer db.Close()
+	ctx := context.Background()
+	subCtx, cancel := context.WithCancel(ctx)
+
+	defer func() {
+		cancel()
+		db.Close()
+	}()
+
+	l2cfg := cfg.L2Config
+	wc := watcher.NewL2WatcherClient(context.Background(), l2Cli, l2cfg.Confirmations, l2cfg.L2MessengerAddress, l2cfg.L2MessageQueueAddress, l2cfg.WithdrawTrieRootSlot, db)
+	loopToFetchEvent(subCtx, wc)
 
 	previousHeight, err := l2Cli.BlockNumber(context.Background())
 	assert.NoError(t, err)
@@ -73,10 +90,8 @@ func testMonitorBridgeContract(t *testing.T) {
 	address, err := bind.WaitDeployed(context.Background(), l2Cli, tx)
 	assert.NoError(t, err)
 
-	rc := prepareRelayerClient(l2Cli, cfg.L2Config.BatchProposerConfig, db, address)
-	rc.Start()
-	defer rc.Stop()
-
+	rc := prepareWatcherClient(l2Cli, db, address)
+	loopToFetchEvent(subCtx, rc)
 	// Call mock_bridge instance sendMessage to trigger emit events
 	toAddress := common.HexToAddress("0x4592d8f8d7b001e72cb26a73e4fa1806a51ac79d")
 	message := []byte("testbridgecontract")
@@ -86,7 +101,7 @@ func testMonitorBridgeContract(t *testing.T) {
 	tx, err = instance.SendMessage(auth, toAddress, fee, message, gasLimit)
 	assert.NoError(t, err)
 	receipt, err := bind.WaitMined(context.Background(), l2Cli, tx)
-	if receipt.Status != types.ReceiptStatusSuccessful || err != nil {
+	if receipt.Status != geth_types.ReceiptStatusSuccessful || err != nil {
 		t.Fatalf("Call failed")
 	}
 
@@ -96,7 +111,7 @@ func testMonitorBridgeContract(t *testing.T) {
 	tx, err = instance.SendMessage(auth, toAddress, fee, message, gasLimit)
 	assert.NoError(t, err)
 	receipt, err = bind.WaitMined(context.Background(), l2Cli, tx)
-	if receipt.Status != types.ReceiptStatusSuccessful || err != nil {
+	if receipt.Status != geth_types.ReceiptStatusSuccessful || err != nil {
 		t.Fatalf("Call failed")
 	}
 
@@ -113,7 +128,7 @@ func testMonitorBridgeContract(t *testing.T) {
 	assert.NoError(t, err)
 	t.Log("Height in DB is", height)
 	assert.Greater(t, height, int64(previousHeight))
-	msgs, err := db.GetL2Messages(map[string]interface{}{"status": orm.MsgPending})
+	msgs, err := db.GetL2Messages(map[string]interface{}{"status": types.MsgPending})
 	assert.NoError(t, err)
 	assert.Equal(t, 2, len(msgs))
 }
@@ -123,7 +138,13 @@ func testFetchMultipleSentMessageInOneBlock(t *testing.T) {
 	db, err := database.NewOrmFactory(cfg.DBConfig)
 	assert.NoError(t, err)
 	assert.NoError(t, migrate.ResetDB(db.GetDB().DB))
-	defer db.Close()
+	ctx := context.Background()
+	subCtx, cancel := context.WithCancel(ctx)
+
+	defer func() {
+		cancel()
+		db.Close()
+	}()
 
 	previousHeight, err := l2Cli.BlockNumber(context.Background()) // shallow the global previousHeight
 	assert.NoError(t, err)
@@ -135,13 +156,12 @@ func testFetchMultipleSentMessageInOneBlock(t *testing.T) {
 	address, err := bind.WaitDeployed(context.Background(), l2Cli, trx)
 	assert.NoError(t, err)
 
-	rc := prepareRelayerClient(l2Cli, cfg.L2Config.BatchProposerConfig, db, address)
-	rc.Start()
-	defer rc.Stop()
+	rc := prepareWatcherClient(l2Cli, db, address)
+	loopToFetchEvent(subCtx, rc)
 
 	// Call mock_bridge instance sendMessage to trigger emit events multiple times
 	numTransactions := 4
-	var tx *types.Transaction
+	var tx *geth_types.Transaction
 
 	for i := 0; i < numTransactions; i++ {
 		addr := common.HexToAddress("0x1c5a77d9fa7ef466951b2f01f724bca3a5820b63")
@@ -157,7 +177,7 @@ func testFetchMultipleSentMessageInOneBlock(t *testing.T) {
 	}
 
 	receipt, err := bind.WaitMined(context.Background(), l2Cli, tx)
-	if receipt.Status != types.ReceiptStatusSuccessful || err != nil {
+	if receipt.Status != geth_types.ReceiptStatusSuccessful || err != nil {
 		t.Fatalf("Call failed")
 	}
 
@@ -173,7 +193,7 @@ func testFetchMultipleSentMessageInOneBlock(t *testing.T) {
 	tx, err = instance.SendMessage(auth, toAddress, fee, message, gasLimit)
 	assert.NoError(t, err)
 	receipt, err = bind.WaitMined(context.Background(), l2Cli, tx)
-	if receipt.Status != types.ReceiptStatusSuccessful || err != nil {
+	if receipt.Status != geth_types.ReceiptStatusSuccessful || err != nil {
 		t.Fatalf("Call failed")
 	}
 
@@ -185,14 +205,14 @@ func testFetchMultipleSentMessageInOneBlock(t *testing.T) {
 	assert.NoError(t, err)
 	t.Log("LatestHeight is", height)
 	assert.Greater(t, height, int64(previousHeight)) // height must be greater than previousHeight because confirmations is 0
-	msgs, err := db.GetL2Messages(map[string]interface{}{"status": orm.MsgPending})
+	msgs, err := db.GetL2Messages(map[string]interface{}{"status": types.MsgPending})
 	assert.NoError(t, err)
 	assert.Equal(t, 5, len(msgs))
 }
 
-func prepareRelayerClient(l2Cli *ethclient.Client, bpCfg *config.BatchProposerConfig, db database.OrmFactory, contractAddr common.Address) *WatcherClient {
+func prepareWatcherClient(l2Cli *ethclient.Client, db database.OrmFactory, contractAddr common.Address) *watcher.L2WatcherClient {
 	confirmations := rpc.LatestBlockNumber
-	return NewL2WatcherClient(context.Background(), l2Cli, confirmations, bpCfg, contractAddr, db)
+	return watcher.NewL2WatcherClient(context.Background(), l2Cli, confirmations, contractAddr, contractAddr, common.Hash{}, db)
 }
 
 func prepareAuth(t *testing.T, l2Cli *ethclient.Client, privateKey *ecdsa.PrivateKey) *bind.TransactOpts {
@@ -204,3 +224,7 @@ func prepareAuth(t *testing.T, l2Cli *ethclient.Client, privateKey *ecdsa.Privat
 	assert.NoError(t, err)
 	return auth
 }
+
+func loopToFetchEvent(subCtx context.Context, watcher *watcher.L2WatcherClient) {
+	go cutils.Loop(subCtx, 2*time.Second, watcher.FetchContractEvent)
+}

bridge/watcher/watcher_test.go

@@ -0,0 +1,91 @@
+package watcher_test
+
+import (
+	"encoding/json"
+	"os"
+	"testing"
+
+	"github.com/scroll-tech/go-ethereum/ethclient"
+	"github.com/stretchr/testify/assert"
+
+	"scroll-tech/common/docker"
+	"scroll-tech/common/types"
+
+	"scroll-tech/bridge/config"
+)
+
+var (
+	// config
+	cfg *config.Config
+
+	base *docker.App
+
+	// l2geth client
+	l2Cli *ethclient.Client
+
+	// block trace
+	wrappedBlock1 *types.WrappedBlock
+	wrappedBlock2 *types.WrappedBlock
+)
+
+func setupEnv(t *testing.T) (err error) {
+	// Load config.
+	cfg, err = config.NewConfig("../config.json")
+	assert.NoError(t, err)
+
+	base.RunImages(t)
+
+	cfg.L2Config.RelayerConfig.SenderConfig.Endpoint = base.L1gethImg.Endpoint()
+	cfg.L1Config.RelayerConfig.SenderConfig.Endpoint = base.L2gethImg.Endpoint()
+	cfg.DBConfig = base.DBConfig
+
+	// Create l2geth client.
+	l2Cli, err = base.L2Client()
+	assert.NoError(t, err)
+
+	templateBlockTrace1, err := os.ReadFile("../../common/testdata/blockTrace_02.json")
+	if err != nil {
+		return err
+	}
+	// unmarshal blockTrace
+	wrappedBlock1 = &types.WrappedBlock{}
+	if err = json.Unmarshal(templateBlockTrace1, wrappedBlock1); err != nil {
+		return err
+	}
+
+	templateBlockTrace2, err := os.ReadFile("../../common/testdata/blockTrace_03.json")
+	if err != nil {
+		return err
+	}
+	// unmarshal blockTrace
+	wrappedBlock2 = &types.WrappedBlock{}
+	if err = json.Unmarshal(templateBlockTrace2, wrappedBlock2); err != nil {
+		return err
+	}
+	return err
+}
+
+func TestMain(m *testing.M) {
+	base = docker.NewDockerApp()
+
+	m.Run()
+
+	base.Free()
+}
+
+func TestFunction(t *testing.T) {
+	if err := setupEnv(t); err != nil {
+		t.Fatal(err)
+	}
+	// Run l1 watcher test cases.
+	t.Run("TestStartWatcher", testStartWatcher)
+	// Run l2 watcher test cases.
+	t.Run("TestCreateNewWatcherAndStop", testCreateNewWatcherAndStop)
+	t.Run("TestMonitorBridgeContract", testMonitorBridgeContract)
+	t.Run("TestFetchMultipleSentMessageInOneBlock", testFetchMultipleSentMessageInOneBlock)
+
+	// Run batch proposer test cases.
+	t.Run("TestBatchProposerProposeBatch", testBatchProposerProposeBatch)
+	t.Run("TestBatchProposerGracefulRestart", testBatchProposerGracefulRestart)
+
+}

build/dockerfiles/coordinator.Dockerfile

@@ -13,7 +13,7 @@ RUN cargo chef cook --release --recipe-path recipe.json
 
 COPY ./common/libzkp/impl .
 RUN cargo build --release
-RUN find ./ | grep libzktrie.so | xargs -i cp {} /app/target/release/
+RUN find ./ | grep libzktrie.so | xargs -I{} cp {} /app/target/release/
 
 
 # Download Go dependencies

build/dockerfiles/event_watcher.Dockerfile

@@ -0,0 +1,26 @@
+# Download Go dependencies
+FROM scrolltech/go-alpine-builder:1.18 as base
+
+WORKDIR /src
+COPY go.work* ./
+COPY ./bridge/go.* ./bridge/
+COPY ./common/go.* ./common/
+COPY ./coordinator/go.* ./coordinator/
+COPY ./database/go.* ./database/
+COPY ./roller/go.* ./roller/
+COPY ./tests/integration-test/go.* ./tests/integration-test/
+RUN go mod download -x
+
+# Build event_watcher
+FROM base as builder
+
+RUN --mount=target=. \
+    --mount=type=cache,target=/root/.cache/go-build \
+    cd /src/bridge/cmd/event_watcher/ && go build -v -p 4 -o /bin/event_watcher
+
+# Pull event_watcher into a second stage deploy alpine container
+FROM alpine:latest
+
+COPY --from=builder /bin/event_watcher /bin/
+
+ENTRYPOINT ["event_watcher"]

build/dockerfiles/event_watcher.Dockerfile.dockerignore

@@ -2,4 +2,4 @@ assets/
 docs/
 l2geth/
 rpc-gateway/
-*target/*
+*target/*

build/dockerfiles/gas_oracle.Dockerfile

@@ -11,16 +11,16 @@ COPY ./roller/go.* ./roller/
 COPY ./tests/integration-test/go.* ./tests/integration-test/
 RUN go mod download -x
 
-# Build bridge
+# Build gas_oracle
 FROM base as builder
 
 RUN --mount=target=. \
     --mount=type=cache,target=/root/.cache/go-build \
-    cd /src/bridge/cmd && go build -v -p 4 -o /bin/bridge
+    cd /src/bridge/cmd/gas_oracle/ && go build -v -p 4 -o /bin/gas_oracle
 
-# Pull bridge into a second stage deploy alpine container
+# Pull gas_oracle into a second stage deploy alpine container
 FROM alpine:latest
 
-COPY --from=builder /bin/bridge /bin/
+COPY --from=builder /bin/gas_oracle /bin/
 
-ENTRYPOINT ["bridge"]
+ENTRYPOINT ["gas_oracle"]

build/dockerfiles/gas_oracle.Dockerfile.dockerignore

@@ -0,0 +1,5 @@
+assets/
+docs/
+l2geth/
+rpc-gateway/
+*target/*

build/dockerfiles/msg_relayer.Dockerfile

@@ -0,0 +1,26 @@
+# Download Go dependencies
+FROM scrolltech/go-alpine-builder:1.18 as base
+
+WORKDIR /src
+COPY go.work* ./
+COPY ./bridge/go.* ./bridge/
+COPY ./common/go.* ./common/
+COPY ./coordinator/go.* ./coordinator/
+COPY ./database/go.* ./database/
+COPY ./roller/go.* ./roller/
+COPY ./tests/integration-test/go.* ./tests/integration-test/
+RUN go mod download -x
+
+# Build msg_relayer
+FROM base as builder
+
+RUN --mount=target=. \
+    --mount=type=cache,target=/root/.cache/go-build \
+    cd /src/bridge/cmd/msg_relayer/ && go build -v -p 4 -o /bin/msg_relayer
+
+# Pull msg_relayer into a second stage deploy alpine container
+FROM alpine:latest
+
+COPY --from=builder /bin/msg_relayer /bin/
+
+ENTRYPOINT ["msg_relayer"]

build/dockerfiles/msg_relayer.Dockerfile.dockerignore

@@ -0,0 +1,5 @@
+assets/
+docs/
+l2geth/
+rpc-gateway/
+*target/*

build/dockerfiles/rollup_relayer.Dockerfile

@@ -0,0 +1,26 @@
+# Download Go dependencies
+FROM scrolltech/go-alpine-builder:1.18 as base
+
+WORKDIR /src
+COPY go.work* ./
+COPY ./bridge/go.* ./bridge/
+COPY ./common/go.* ./common/
+COPY ./coordinator/go.* ./coordinator/
+COPY ./database/go.* ./database/
+COPY ./roller/go.* ./roller/
+COPY ./tests/integration-test/go.* ./tests/integration-test/
+RUN go mod download -x
+
+# Build rollup_relayer
+FROM base as builder
+
+RUN --mount=target=. \
+    --mount=type=cache,target=/root/.cache/go-build \
+    cd /src/bridge/cmd/rollup_relayer/ && go build -v -p 4 -o /bin/rollup_relayer
+
+# Pull rollup_relayer into a second stage deploy alpine container
+FROM alpine:latest
+
+COPY --from=builder /bin/rollup_relayer /bin/
+
+ENTRYPOINT ["rollup_relayer"]

build/dockerfiles/rollup_relayer.Dockerfile.dockerignore

@@ -0,0 +1,5 @@
+assets/
+docs/
+l2geth/
+rpc-gateway/
+*target/*

build/post-test-report-coverage.sh

@@ -4,11 +4,11 @@ ${GOROOT}/bin/bin/gocover-cobertura < coverage.bridge.txt > coverage.bridge.xml
 ${GOROOT}/bin/bin/gocover-cobertura < coverage.db.txt > coverage.db.xml
 ${GOROOT}/bin/bin/gocover-cobertura < coverage.common.txt > coverage.common.xml
 ${GOROOT}/bin/bin/gocover-cobertura < coverage.coordinator.txt > coverage.coordinator.xml
-${GOROOT}/bin/bin/gocover-cobertura < coverage.integration.txt > coverage.integration.xml
+#${GOROOT}/bin/bin/gocover-cobertura < coverage.integration.txt > coverage.integration.xml
 
 npx cobertura-merge -o cobertura.xml \
     package1=coverage.bridge.xml \
     package2=coverage.db.xml \
     package3=coverage.common.xml \
-    package4=coverage.coordinator.xml \
-    package5=coverage.integration.xml
+    package4=coverage.coordinator.xml
+    # package5=coverage.integration.xml

build/push-docker-tag.Jenkinsfile

@@ -1,6 +1,6 @@
 imagePrefix = 'scrolltech'
 credentialDocker = 'dockerhub'
-
+TAGNAME = ''
 pipeline {
     agent any
     options {
@@ -41,16 +41,38 @@ pipeline {
                                 if (TAGNAME == ""){
                                     return;
                                 }
-                                sh "docker login --username=${dockerUser} --password=${dockerPassword}"
-                                sh "make -C bridge docker"
-                                sh "make -C coordinator docker"
-                                sh "docker tag scrolltech/bridge:latest scrolltech/bridge:${TAGNAME}"
-                                sh "docker tag scrolltech/coordinator:latest scrolltech/coordinator:${TAGNAME}"
-                                sh "docker push scrolltech/bridge:${TAGNAME}"
-                                sh "docker push scrolltech/coordinator:${TAGNAME}"
+                                sh "docker login --username=$dockerUser --password=$dockerPassword"
+                                catchError(buildResult: 'SUCCESS', stageResult: 'SUCCESS') {
+                                    script {
+                                        try {
+                                            sh "docker manifest inspect scrolltech/bridge:$TAGNAME > /dev/null"
+                                        } catch (e) {
+                                            // only build if the tag non existed
+                                            //sh "docker login --username=${dockerUser} --password=${dockerPassword}"
+                                            sh "make -C bridge docker"
+                                            sh "docker tag scrolltech/bridge:latest scrolltech/bridge:${TAGNAME}"
+                                            sh "docker push scrolltech/bridge:${TAGNAME}"
+                                            throw e
+                                        }
+                                    }
+                                }
+                                catchError(buildResult: 'SUCCESS', stageResult: 'SUCCESS') {
+                                    script {
+                                        try {
+                                            sh "docker manifest inspect scrolltech/coordinator:$TAGNAME > /dev/null"
+                                        } catch (e) {
+                                            // only build if the tag non existed
+                                            //sh "docker login --username=${dockerUser} --password=${dockerPassword}"
+                                            sh "make -C coordinator docker"
+                                            sh "docker tag scrolltech/coordinator:latest scrolltech/coordinator:${TAGNAME}"
+                                            sh "docker push scrolltech/coordinator:${TAGNAME}"
+                                            throw e
+                                        }
+                                    }
+                                }
                             }                              
                     }
-               }
+                }
             }
         }
     }

build/run_tests.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+set -uex
+
+profile_name=$1
+
+exclude_dirs=("scroll-tech/bridge/cmd" "scroll-tech/bridge/tests" "scroll-tech/bridge/mock_bridge" "scroll-tech/coordinator/cmd" "scroll-tech/coordinator/config")
+
+all_packages=$(go list ./... | grep -v "^scroll-tech/${profile_name}$")
+coverpkg="scroll-tech/${profile_name}"
+
+for pkg in $all_packages; do
+    exclude_pkg=false
+    for exclude_dir in "${exclude_dirs[@]}"; do
+        if [[ $pkg == $exclude_dir* ]]; then
+            exclude_pkg=true
+            break
+        fi
+    done
+
+    if [ "$exclude_pkg" = false ]; then
+        coverpkg="$coverpkg,$pkg/..."
+    fi
+done
+
+echo "coverage.${profile_name}.txt"
+go test -v -race -gcflags="-l" -ldflags="-s=false" -coverpkg="$coverpkg" -coverprofile=../coverage.${profile_name}.txt -covermode=atomic ./...

common/bytecode/.gitignore

@@ -0,0 +1,2 @@
+*.go
+*.sol

common/bytecode/Makefile

@@ -0,0 +1,49 @@
+.PHONY: all erc20 greeter scroll
+
+all: erc20 greeter scroll
+
+erc20:
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./erc20/ERC20Mock.json --pkg erc20 --out ./erc20/ERC20Mock.go
+
+greeter:
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./greeter/Greeter.json --pkg greeter --out ./greeter/Greeter.go
+
+scroll:
+	#L1/gateways
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/gateways/L1ERC20Gateway.json         --pkg gateways --out ./scroll/L1/gateways/L1ERC20Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/gateways/L1ERC721Gateway.json        --pkg gateways --out ./scroll/L1/gateways/L1ERC721Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/gateways/L1ERC1155Gateway.json       --pkg gateways --out ./scroll/L1/gateways/L1ERC1155Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/gateways/L1GatewayRouter.json        --pkg gateways --out ./scroll/L1/gateways/L1GatewayRouter.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/gateways/L1StandardERC20Gateway.json --pkg gateways --out ./scroll/L1/gateways/L1StandardERC20Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/gateways/L1CustomERC20Gateway.json   --pkg gateways --out ./scroll/L1/gateways/L1CustomERC20Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/gateways/L1WETHGateway.json          --pkg gateways --out ./scroll/L1/gateways/L1WETHGateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/gateways/L1ETHGateway.json			--pkg gateways --out ./scroll/L1/gateways/L1ETHGateway.go
+	#L1/rollup
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/rollup/L1MessageQueue.json 			--pkg rollup --out ./scroll/L1/rollup/L1MessageQueue.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/rollup/L2GasPriceOracle.json 		--pkg rollup --out ./scroll/L1/rollup/L2GasPriceOracle.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/rollup/ScrollChain.json 				--pkg rollup --out ./scroll/L1/rollup/ScrollChain.go
+	#L1
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L1/L1ScrollMessenger.json 				--pkg l1 --out ./scroll/L1/L1ScrollMessenger.go
+	#L2/gateways
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/gateways/L2CustomERC20Gateway.json    	--pkg gateways --out ./scroll/L2/gateways/L2CustomERC20Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/gateways/L2ERC20Gateway.json          	--pkg gateways --out ./scroll/L2/gateways/L2ERC20Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/gateways/L2ERC721Gateway.json         	--pkg gateways --out ./scroll/L2/gateways/L2ERC721Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/gateways/L2ERC1155Gateway.json        	--pkg gateways --out ./scroll/L2/gateways/L2ERC1155Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/gateways/L2GatewayRouter.json         	--pkg gateways --out ./scroll/L2/gateways/L2GatewayRouter.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/gateways/L2StandardERC20Gateway.json  	--pkg gateways --out ./scroll/L2/gateways/L2StandardERC20Gateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/gateways/L2WETHGateway.json           	--pkg gateways --out ./scroll/L2/gateways/L2WETHGateway.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/gateways/L2ETHGateway.json           	--pkg gateways --out ./scroll/L2/gateways/L2ETHGateway.go
+	#L2/predeploys
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/predeploys/L1BlockContainer.json   	--pkg predeploys --out ./scroll/L2/predeploys/L1BlockContainer.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/predeploys/L1GasPriceOracle.json   	--pkg predeploys --out ./scroll/L2/predeploys/L1GasPriceOracle.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/predeploys/L2MessageQueue.json   	--pkg predeploys --out ./scroll/L2/predeploys/L2MessageQueue.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/predeploys/L2TxFeeVault.json   		--pkg predeploys --out ./scroll/L2/predeploys/L2TxFeeVault.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/predeploys/WETH9.json                --pkg predeploys --out ./scroll/L2/predeploys/WETH9.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/predeploys/Whitelist.json            --pkg predeploys --out ./scroll/L2/predeploys/Whitelist.go
+	#L2
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/L2/L2ScrollMessenger.json --pkg l2 --out ./scroll/L2/L2ScrollMessenger.go
+	#External
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/external/External.json --pkg external --out ./scroll/external/External.go
+	#Libraries
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/libraries/ScrollStandardERC20.json 			--pkg libraries --out ./scroll/libraries/ScrollStandardERC20.go
+	go run github.com/scroll-tech/go-ethereum/cmd/abigen --combined-json ./scroll/libraries/ScrollStandardERC20Factory.json 	--pkg libraries --out ./scroll/libraries/ScrollStandardERC20Factory.go

common/bytecode/README.md

@@ -0,0 +1,40 @@
+## How to pre deploy contracts?
+* Please reference to https://github.com/scroll-tech/genesis-creator.
+1. Setup env
+```bash
+   git clone git@github.com:scroll-tech/genesis-creator.git
+   cd genesis-creator
+   go get -v github.com/scroll-tech/go-ethereum@develop && go mod tidy
+   make abi && make genesis-creator
+   make l2geth-docker
+```
+
+2. Start docker and write pre deployed contracts into genesis file.
+```bash
+   make start-docker
+   ./bin/genesis-creator -genesis ${SCROLLPATH}/common/docker/l2geth/genesis.json -contract [erc20|greeter]
+```
+
+3. Rebuild l2geth docker.
+```bash
+   cd ${SCROLLPATH}
+   make dev_docker
+```
+
+## How to get contract abi?
+* Other contracts' step same to eth20, e.g:
+1. Install solc.
+   
+    *Reference to https://docs.soliditylang.org/en/latest/installing-solidity.html*
+
+2. Get abi file.
+```bash
+   cd genesis-creator
+   solc --combined-json "abi" --optimize ${SCROLLPATH}/common/bytecode/erc20/ERC20Mock.sol | jq > ${SCROLLPATH}/common/bytecode/erc20/ERC20Mock.json
+```
+
+3. Translate abi to go.
+```bash
+   cd ${SCROLLPATH}
+   make -C common/bytecode all
+```

common/bytecode/erc20/ERC20Mock.json

@@ -0,0 +1,387 @@
+{
+  "contracts": {
+    "tests/contracts/erc20/erc20.sol:ERC20Mock": {
+      "abi": [
+        {
+          "inputs": [
+            {
+              "internalType": "string",
+              "name": "name",
+              "type": "string"
+            },
+            {
+              "internalType": "string",
+              "name": "symbol",
+              "type": "string"
+            },
+            {
+              "internalType": "address",
+              "name": "initialAccount",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "initialBalance",
+              "type": "uint256"
+            }
+          ],
+          "stateMutability": "payable",
+          "type": "constructor"
+        },
+        {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "owner",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "spender",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "internalType": "uint256",
+              "name": "value",
+              "type": "uint256"
+            }
+          ],
+          "name": "Approval",
+          "type": "event"
+        },
+        {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "from",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "to",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "internalType": "uint256",
+              "name": "value",
+              "type": "uint256"
+            }
+          ],
+          "name": "Transfer",
+          "type": "event"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "owner",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "spender",
+              "type": "address"
+            }
+          ],
+          "name": "allowance",
+          "outputs": [
+            {
+              "internalType": "uint256",
+              "name": "",
+              "type": "uint256"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "spender",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "amount",
+              "type": "uint256"
+            }
+          ],
+          "name": "approve",
+          "outputs": [
+            {
+              "internalType": "bool",
+              "name": "",
+              "type": "bool"
+            }
+          ],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "owner",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "spender",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "value",
+              "type": "uint256"
+            }
+          ],
+          "name": "approveInternal",
+          "outputs": [],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "account",
+              "type": "address"
+            }
+          ],
+          "name": "balanceOf",
+          "outputs": [
+            {
+              "internalType": "uint256",
+              "name": "",
+              "type": "uint256"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "account",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "amount",
+              "type": "uint256"
+            }
+          ],
+          "name": "burn",
+          "outputs": [],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [],
+          "name": "decimals",
+          "outputs": [
+            {
+              "internalType": "uint8",
+              "name": "",
+              "type": "uint8"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "spender",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "subtractedValue",
+              "type": "uint256"
+            }
+          ],
+          "name": "decreaseAllowance",
+          "outputs": [
+            {
+              "internalType": "bool",
+              "name": "",
+              "type": "bool"
+            }
+          ],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "spender",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "addedValue",
+              "type": "uint256"
+            }
+          ],
+          "name": "increaseAllowance",
+          "outputs": [
+            {
+              "internalType": "bool",
+              "name": "",
+              "type": "bool"
+            }
+          ],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "account",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "amount",
+              "type": "uint256"
+            }
+          ],
+          "name": "mint",
+          "outputs": [],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [],
+          "name": "name",
+          "outputs": [
+            {
+              "internalType": "string",
+              "name": "",
+              "type": "string"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [],
+          "name": "symbol",
+          "outputs": [
+            {
+              "internalType": "string",
+              "name": "",
+              "type": "string"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [],
+          "name": "totalSupply",
+          "outputs": [
+            {
+              "internalType": "uint256",
+              "name": "",
+              "type": "uint256"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "to",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "amount",
+              "type": "uint256"
+            }
+          ],
+          "name": "transfer",
+          "outputs": [
+            {
+              "internalType": "bool",
+              "name": "",
+              "type": "bool"
+            }
+          ],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "from",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "to",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "amount",
+              "type": "uint256"
+            }
+          ],
+          "name": "transferFrom",
+          "outputs": [
+            {
+              "internalType": "bool",
+              "name": "",
+              "type": "bool"
+            }
+          ],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "from",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "to",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "value",
+              "type": "uint256"
+            }
+          ],
+          "name": "transferInternal",
+          "outputs": [],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        }
+      ]
+    }
+  },
+  "version": "0.8.16+commit.07a7930e.Darwin.appleclang"
+}

common/bytecode/greeter/Greeter.json

@@ -0,0 +1,72 @@
+{
+  "contracts": {
+    "greeter/Greeter.sol:Greeter": {
+      "abi": [
+        {
+          "inputs": [
+            {
+              "internalType": "uint256",
+              "name": "num",
+              "type": "uint256"
+            }
+          ],
+          "stateMutability": "nonpayable",
+          "type": "constructor"
+        },
+        {
+          "inputs": [],
+          "name": "retrieve",
+          "outputs": [
+            {
+              "internalType": "uint256",
+              "name": "",
+              "type": "uint256"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [],
+          "name": "retrieve_failing",
+          "outputs": [
+            {
+              "internalType": "uint256",
+              "name": "",
+              "type": "uint256"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "uint256",
+              "name": "num",
+              "type": "uint256"
+            }
+          ],
+          "name": "set_value",
+          "outputs": [],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "uint256",
+              "name": "num",
+              "type": "uint256"
+            }
+          ],
+          "name": "set_value_failing",
+          "outputs": [],
+          "stateMutability": "nonpayable",
+          "type": "function"
+        }
+      ]
+    }
+  },
+  "version": "0.8.16+commit.07a7930e.Darwin.appleclang"
+}

common/bytecode/scroll/L1/.gitignore

@@ -0,0 +1 @@
+*.go

common/bytecode/scroll/L1/gateways/L1ERC20Gateway.json

@@ -0,0 +1,237 @@
+{
+  "contracts": {
+    "scroll/L1/gateways/L1ERC20Gateway.sol:L1ERC20Gateway": {
+      "abi": [
+        {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "l1Token",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "l2Token",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "from",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "internalType": "address",
+              "name": "to",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "internalType": "uint256",
+              "name": "amount",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "internalType": "bytes",
+              "name": "data",
+              "type": "bytes"
+            }
+          ],
+          "name": "DepositERC20",
+          "type": "event"
+        },
+        {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "l1Token",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "l2Token",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "internalType": "address",
+              "name": "from",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "internalType": "address",
+              "name": "to",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "internalType": "uint256",
+              "name": "amount",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "internalType": "bytes",
+              "name": "data",
+              "type": "bytes"
+            }
+          ],
+          "name": "FinalizeWithdrawERC20",
+          "type": "event"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "_token",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "_amount",
+              "type": "uint256"
+            },
+            {
+              "internalType": "uint256",
+              "name": "_gasLimit",
+              "type": "uint256"
+            }
+          ],
+          "name": "depositERC20",
+          "outputs": [],
+          "stateMutability": "payable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "_token",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "_to",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "_amount",
+              "type": "uint256"
+            },
+            {
+              "internalType": "uint256",
+              "name": "_gasLimit",
+              "type": "uint256"
+            }
+          ],
+          "name": "depositERC20",
+          "outputs": [],
+          "stateMutability": "payable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "_token",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "_to",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "_amount",
+              "type": "uint256"
+            },
+            {
+              "internalType": "bytes",
+              "name": "_data",
+              "type": "bytes"
+            },
+            {
+              "internalType": "uint256",
+              "name": "_gasLimit",
+              "type": "uint256"
+            }
+          ],
+          "name": "depositERC20AndCall",
+          "outputs": [],
+          "stateMutability": "payable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "_l1Token",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "_l2Token",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "_from",
+              "type": "address"
+            },
+            {
+              "internalType": "address",
+              "name": "_to",
+              "type": "address"
+            },
+            {
+              "internalType": "uint256",
+              "name": "_amount",
+              "type": "uint256"
+            },
+            {
+              "internalType": "bytes",
+              "name": "_data",
+              "type": "bytes"
+            }
+          ],
+          "name": "finalizeWithdrawERC20",
+          "outputs": [],
+          "stateMutability": "payable",
+          "type": "function"
+        },
+        {
+          "inputs": [
+            {
+              "internalType": "address",
+              "name": "_l1Token",
+              "type": "address"
+            }
+          ],
+          "name": "getL2ERC20Address",
+          "outputs": [
+            {
+              "internalType": "address",
+              "name": "",
+              "type": "address"
+            }
+          ],
+          "stateMutability": "view",
+          "type": "function"
+        }
+      ],
+      "bin": ""
+    }
+  },
+  "version": "0.8.17+commit.8df45f5f.Darwin.appleclang"
+}