Problem: repeated tx sender recovery is wastful

CHANGELOG.md

@@ -60,6 +60,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (evm) [#1582](https://github.com/evmos/ethermint/pull/1582) Cleanup `evm` files
 * (evm) [#1544](https://github.com/evmos/ethermint/pull/1544) Migrate deprecated event emitting to new `TypedEvent`
 * (deps) [#1532](https://github.com/evmos/ethermint/pull/1532) Upgrade Go-Ethereum version to [`v1.10.26`](https://github.com/ethereum/go-ethereum/releases/tag/v1.10.26).
+* (ante) [#1717](https://github.com/evmos/ethermint/pull/1717) Reuse sender recovery result.
 
 ### Bug Fixes
 

x/evm/keeper/msg_server.go

@@ -56,7 +56,7 @@ func (k *Keeper) EthereumTx(goCtx context.Context, msg *types.MsgEthereumTx) (*t
 		labels = append(labels, telemetry.NewLabel("execution", "call"))
 	}
 
-	response, err := k.ApplyTransaction(ctx, tx)
+	response, err := k.ApplyTransaction(ctx, msg)
 	if err != nil {
 		return nil, errorsmod.Wrap(err, "failed to apply transaction")
 	}

x/evm/keeper/state_transition.go

@@ -146,7 +146,7 @@ func (k Keeper) GetHashFn(ctx sdk.Context) vm.GetHashFunc {
 // returning.
 //
 // For relevant discussion see: https://github.com/cosmos/cosmos-sdk/discussions/9072
-func (k *Keeper) ApplyTransaction(ctx sdk.Context, tx *ethtypes.Transaction) (*types.MsgEthereumTxResponse, error) {
+func (k *Keeper) ApplyTransaction(ctx sdk.Context, msgEth *types.MsgEthereumTx) (*types.MsgEthereumTxResponse, error) {
 	var (
 		bloom        *big.Int
 		bloomReceipt ethtypes.Bloom
@@ -156,11 +156,12 @@ func (k *Keeper) ApplyTransaction(ctx sdk.Context, tx *ethtypes.Transaction) (*t
 	if err != nil {
 		return nil, errorsmod.Wrap(err, "failed to load evm config")
 	}
-	txConfig := k.TxConfig(ctx, tx.Hash())
+	ethTx := msgEth.AsTransaction()
+	txConfig := k.TxConfig(ctx, ethTx.Hash())
 
 	// get the signer according to the chain rules from the config and block height
 	signer := ethtypes.MakeSigner(cfg.ChainConfig, big.NewInt(ctx.BlockHeight()))
-	msg, err := tx.AsMessage(signer, cfg.BaseFee)
+	msg, err := msgEth.AsMessage(signer, cfg.BaseFee)
 	if err != nil {
 		return nil, errorsmod.Wrap(err, "failed to return ethereum transaction as core message")
 	}
@@ -206,7 +207,7 @@ func (k *Keeper) ApplyTransaction(ctx sdk.Context, tx *ethtypes.Transaction) (*t
 	}
 
 	receipt := &ethtypes.Receipt{
-		Type:              tx.Type(),
+		Type:              ethTx.Type(),
 		PostState:         nil, // TODO: intermediate state root
 		CumulativeGasUsed: cumulativeGasUsed,
 		Bloom:             bloomReceipt,

x/evm/keeper/state_transition_benchmark_test.go

@@ -46,7 +46,7 @@ func newSignedEthTx(
 	addr sdk.Address,
 	krSigner keyring.Signer,
 	ethSigner ethtypes.Signer,
-) (*ethtypes.Transaction, error) {
+) (*evmtypes.MsgEthereumTx, error) {
 	var ethTx *ethtypes.Transaction
 	switch txData := txData.(type) {
 	case *ethtypes.AccessListTx:
@@ -72,7 +72,11 @@ func newSignedEthTx(
 		return nil, err
 	}
 
-	return ethTx, nil
+	var msg evmtypes.MsgEthereumTx
+	if err := msg.FromEthereumTx(ethTx); err != nil {
+		return nil, err
+	}
+	return &msg, nil
 }
 
 func newEthMsgTx(

x/evm/types/msg.go

@@ -35,6 +35,7 @@ import (
 	"github.com/evmos/ethermint/types"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/math"
 	"github.com/ethereum/go-ethereum/core"
 	ethtypes "github.com/ethereum/go-ethereum/core/types"
 )
@@ -325,7 +326,42 @@ func (msg MsgEthereumTx) AsTransaction() *ethtypes.Transaction {
 
 // AsMessage creates an Ethereum core.Message from the msg fields
 func (msg MsgEthereumTx) AsMessage(signer ethtypes.Signer, baseFee *big.Int) (core.Message, error) {
-	return msg.AsTransaction().AsMessage(signer, baseFee)
+	txData, err := UnpackTxData(msg.Data)
+	if err != nil {
+		return nil, err
+	}
+
+	gasPrice, gasFeeCap, gasTipCap := txData.GetGasPrice(), txData.GetGasFeeCap(), txData.GetGasTipCap()
+	if baseFee != nil {
+		gasPrice = math.BigMin(gasPrice.Add(gasTipCap, baseFee), gasFeeCap)
+	}
+	var from common.Address
+	if len(msg.From) > 0 {
+		// user can't set arbitrary value in `From` field in transaction,
+		// the SigVerify ante handler will verify the signature and recover
+		// the sender address and populate the `From` field, so the other code can
+		// use it directly when available.
+		from = common.HexToAddress(msg.From)
+	} else {
+		// heavy path
+		from, err = signer.Sender(msg.AsTransaction())
+		if err != nil {
+			return nil, err
+		}
+	}
+	ethMsg := ethtypes.NewMessage(
+		from,
+		txData.GetTo(),
+		txData.GetNonce(),
+		txData.GetValue(),
+		txData.GetGas(),
+		gasPrice, gasFeeCap, gasTipCap,
+		txData.GetData(),
+		txData.GetAccessList(),
+		false,
+	)
+
+	return ethMsg, nil
 }
 
 // GetSender extracts the sender address from the signature values using the latest signer for the given chainID.