Add MaxTxSize check to ValidateExpressLaneTx()

Author: KolbyML

cmd/el-proxy/config.go

@@ -13,6 +13,7 @@ import (
 
 	"github.com/offchainlabs/nitro/cmd/conf"
 	"github.com/offchainlabs/nitro/cmd/genericconf"
+	"github.com/offchainlabs/nitro/execution/gethexec"
 	"github.com/offchainlabs/nitro/util/colors"
 )
 
@@ -31,6 +32,7 @@ type ExpressLaneProxyConfig struct {
 	HTTP          genericconf.HTTPConfig          `koanf:"http"`
 	WS            genericconf.WSConfig            `koanf:"ws"`
 	IPC           genericconf.IPCConfig           `koanf:"ipc"`
+	MaxTxDataSize uint64                          `koanf:"max-tx-data-size" reload:"hot"`
 	Metrics       bool                            `koanf:"metrics"`
 	MetricsServer genericconf.MetricsServerConfig `koanf:"metrics-server"`
 	PProf         bool                            `koanf:"pprof"`
@@ -72,6 +74,7 @@ var ExpressLaneProxyConfigDefault = ExpressLaneProxyConfig{
 	HTTP:          HTTPConfigDefault,
 	WS:            WSConfigDefault,
 	IPC:           IPCConfigDefault,
+	MaxTxDataSize: uint64(gethexec.DefaultSequencerConfig.MaxTxDataSize),
 	Metrics:       false,
 	MetricsServer: genericconf.MetricsServerConfigDefault,
 	PProf:         false,
@@ -94,6 +97,7 @@ func ExpressLaneProxyConfigAddOptions(f *pflag.FlagSet) {
 	genericconf.HTTPConfigAddOptions("http", f)
 	genericconf.WSConfigAddOptions("ws", f)
 	genericconf.IPCConfigAddOptions("ipc", f)
+	f.Uint64("max-tx-data-size", ExpressLaneProxyConfigDefault.MaxTxDataSize, "maximum transaction size the sequencer will accept")
 	f.Bool("metrics", ExpressLaneProxyConfigDefault.Metrics, "enable metrics")
 	genericconf.MetricsServerAddOptions("metrics-server", f)
 	f.Bool("pprof", ExpressLaneProxyConfigDefault.PProf, "enable pprof")
@@ -143,6 +147,9 @@ func (c *ExpressLaneProxyConfig) GetReloadInterval() time.Duration {
 }
 
 func (c *ExpressLaneProxyConfig) Validate() error {
+	if err := gethexec.ValidateMaxTxDataSize(c.MaxTxDataSize); err != nil {
+		return err
+	}
 	return nil
 }
 

cmd/el-proxy/main.go

@@ -121,15 +121,19 @@ func NewExpressLaneProxy(
 		return nil, err
 	}
 
-	expressLaneTracker := gethexec.NewExpressLaneTracker(
+	expressLaneTracker, err := gethexec.NewExpressLaneTracker(
 		*roundTimingInfo,
 		time.Millisecond*250,
 		&HeaderProviderAdapter{arbClient},
 		auctionContract,
 		auctionContractAddr,
 		&params.ChainConfig{ChainID: big.NewInt(config.ChainId)},
+		config.MaxTxDataSize,
 		0,
 	)
+	if err != nil {
+		return nil, fmt.Errorf("error creating express lane tracker: %w", err)
+	}
 
 	_, dataSignerFunc, err := util.OpenWallet("el-proxy", &config.Wallet, big.NewInt(config.ChainId))
 	if err != nil {