l2geth: forward tx to sequencer

l2geth/cmd/geth/main.go

@@ -163,6 +163,7 @@ var (
 		utils.RollupEnforceFeesFlag,
 		utils.RollupFeeThresholdDownFlag,
 		utils.RollupFeeThresholdUpFlag,
+		utils.SequencerClientHttpFlag,
 	}
 
 	rpcFlags = []cli.Flag{

l2geth/cmd/geth/usage.go

@@ -77,6 +77,7 @@ var AppHelpFlagGroups = []flagGroup{
 			utils.RollupEnforceFeesFlag,
 			utils.RollupFeeThresholdDownFlag,
 			utils.RollupFeeThresholdUpFlag,
+			utils.SequencerClientHttpFlag,
 		},
 	},
 	{

l2geth/cmd/utils/flags.go

@@ -861,6 +861,11 @@ var (
 		Usage:  "Allow txs with fees above the current fee up to this amount, must be > 1",
 		EnvVar: "ROLLUP_FEE_THRESHOLD_UP",
 	}
+	SequencerClientHttpFlag = cli.StringFlag{
+		Name:   "sequencer.clienthttp",
+		Usage:  "HTTP endpoint for the sequencer client",
+		EnvVar: "SEQUENCER_CLIENT_HTTP",
+	}
 )
 
 // MakeDataDir retrieves the currently requested data directory, terminating
@@ -1137,6 +1142,9 @@ func setRollup(ctx *cli.Context, cfg *rollup.Config) {
 		val := ctx.GlobalFloat64(RollupFeeThresholdUpFlag.Name)
 		cfg.FeeThresholdUp = new(big.Float).SetFloat64(val)
 	}
+	if ctx.GlobalIsSet(SequencerClientHttpFlag.Name) {
+		cfg.SequencerClientHttp = ctx.GlobalString(SequencerClientHttpFlag.Name)
+	}
 }
 
 // setLes configures the les server and ultra light client settings from the command line flags.

l2geth/eth/api_backend.go

@@ -136,6 +136,10 @@ func (b *EthAPIBackend) IngestTransactions(txs []*types.Transaction) error {
 	return nil
 }
 
+func (b *EthAPIBackend) SequencerClientHttp() string {
+	return b.eth.config.Rollup.SequencerClientHttp
+}
+
 func (b *EthAPIBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
 	// Pending block is only known by the miner
 	if number == rpc.PendingBlockNumber {

l2geth/internal/ethapi/api.go

@@ -40,6 +40,7 @@ import (
 	"github.com/ethereum-optimism/optimism/l2geth/core/types"
 	"github.com/ethereum-optimism/optimism/l2geth/core/vm"
 	"github.com/ethereum-optimism/optimism/l2geth/crypto"
+	"github.com/ethereum-optimism/optimism/l2geth/ethclient"
 	"github.com/ethereum-optimism/optimism/l2geth/log"
 	"github.com/ethereum-optimism/optimism/l2geth/p2p"
 	"github.com/ethereum-optimism/optimism/l2geth/params"
@@ -51,6 +52,12 @@ import (
 
 var errOVMUnsupported = errors.New("OVM: Unsupported RPC Method")
 
+const (
+	// defaultDialTimeout is default duration the service will wait on
+	// startup to make a connection to either the L1 or L2 backends.
+	defaultDialTimeout = 5 * time.Second
+)
+
 // PublicEthereumAPI provides an API to access Ethereum related information.
 // It offers only methods that operate on public data that is freely available to anyone.
 type PublicEthereumAPI struct {
@@ -1289,6 +1296,18 @@ func newRPCTransactionFromBlockHash(b *types.Block, hash common.Hash) *RPCTransa
 	return nil
 }
 
+// dialSequencerClientWithTimeout attempts to dial the Sequencer using the
+// provided URL. If the dial doesn't complete within defaultDialTimeout
+// seconds, this method will return an error.
+func dialSequencerClientWithTimeout(ctx context.Context, url string) (
+	*ethclient.Client, error) {
+
+	ctxt, cancel := context.WithTimeout(ctx, defaultDialTimeout)
+	defer cancel()
+
+	return ethclient.DialContext(ctxt, url)
+}
+
 // PublicTransactionPoolAPI exposes methods for the RPC interface
 type PublicTransactionPoolAPI struct {
 	b         Backend
@@ -1649,18 +1668,27 @@ func (s *PublicTransactionPoolAPI) FillTransaction(ctx context.Context, args Sen
 // SendRawTransaction will add the signed transaction to the transaction pool.
 // The sender is responsible for signing the transaction and using the correct nonce.
 func (s *PublicTransactionPoolAPI) SendRawTransaction(ctx context.Context, encodedTx hexutil.Bytes) (common.Hash, error) {
-	if s.b.IsVerifier() {
-		return common.Hash{}, errors.New("Cannot send raw transaction in verifier mode")
+	tx := new(types.Transaction)
+	if err := rlp.DecodeBytes(encodedTx, tx); err != nil {
+		return common.Hash{}, err
 	}
 
 	if s.b.IsSyncing() {
 		return common.Hash{}, errors.New("Cannot send raw transaction while syncing")
 	}
 
-	tx := new(types.Transaction)
-	if err := rlp.DecodeBytes(encodedTx, tx); err != nil {
-		return common.Hash{}, err
+	if s.b.IsVerifier() {
+		client, err := dialSequencerClientWithTimeout(ctx, s.b.SequencerClientHttp())
+		if err != nil {
+			return common.Hash{}, err
+		}
+		err = client.SendTransaction(context.Background(), tx)
+		if err != nil {
+			return common.Hash{}, err
+		}
+		return tx.Hash(), nil
 	}
+
 	// L1Timestamp and L1BlockNumber will be set right before execution
 	txMeta := types.NewTransactionMeta(nil, 0, nil, types.QueueOriginSequencer, nil, nil, encodedTx)
 	tx.SetTransactionMeta(txMeta)

l2geth/internal/ethapi/backend.go

@@ -96,6 +96,7 @@ type Backend interface {
 	SuggestL2GasPrice(context.Context) (*big.Int, error)
 	SetL2GasPrice(context.Context, *big.Int) error
 	IngestTransactions([]*types.Transaction) error
+	SequencerClientHttp() string
 }
 
 func GetAPIs(apiBackend Backend) []rpc.API {

l2geth/les/api_backend.go

@@ -86,6 +86,10 @@ func (b *LesApiBackend) IngestTransactions([]*types.Transaction) error {
 	panic("not implemented")
 }
 
+func (b *LesApiBackend) SequencerClientHttp() string {
+	return b.eth.config.Rollup.SequencerClientHttp
+}
+
 func (b *LesApiBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
 	if number == rpc.LatestBlockNumber || number == rpc.PendingBlockNumber {
 		return b.eth.blockchain.CurrentHeader(), nil

l2geth/rollup/config.go

@@ -37,4 +37,6 @@ type Config struct {
 	// quoted and the transaction being executed
 	FeeThresholdDown *big.Float
 	FeeThresholdUp   *big.Float
+	// HTTP endpoint of the sequencer
+	SequencerClientHttp string
 }

ops/docker-compose.yml

@@ -155,6 +155,7 @@ services:
   replica:
     depends_on:
       - dtl
+      - l2geth
     deploy:
       replicas: 1
     build:
@@ -165,6 +166,7 @@ services:
       - ./envs/geth.env
     environment:
         ETH1_HTTP: http://l1_chain:8545
+        SEQUENCER_CLIENT_HTTP: http://l2geth:8545
         ROLLUP_STATE_DUMP_PATH: http://deployer:8081/state-dump.latest.json
         ROLLUP_CLIENT_HTTP: http://dtl:7878
         ROLLUP_BACKEND: 'l2'