fix: signature validation cache for messages with Delegated signatures. (#9916)

chain/messagepool/messagepool.go

@@ -3,7 +3,6 @@ package messagepool
 import (
 	"bytes"
 	"context"
-	"encoding/hex"
 	"errors"
 	"fmt"
 	"math"
@@ -771,22 +770,10 @@ func sigCacheKey(m *types.SignedMessage) (string, error) {
 		if len(m.Signature.Data) != ffi.SignatureBytes {
 			return "", fmt.Errorf("bls signature incorrectly sized")
 		}
-
 		hashCache := blake2b.Sum256(append(m.Cid().Bytes(), m.Signature.Data...))
-
 		return string(hashCache[:]), nil
-	case crypto.SigTypeSecp256k1:
+	case crypto.SigTypeSecp256k1, crypto.SigTypeDelegated:
 		return string(m.Cid().Bytes()), nil
-	case crypto.SigTypeDelegated:
-		txArgs, err := ethtypes.NewEthTxArgsFromMessage(&m.Message)
-		if err != nil {
-			return "", err
-		}
-		msg, err := txArgs.HashedOriginalRlpMsg()
-		if err != nil {
-			return "", err
-		}
-		return hex.EncodeToString(msg), nil
 	default:
 		return "", xerrors.Errorf("unrecognized signature type: %d", m.Signature.Type)
 	}

chain/types/ethtypes/eth_transactions.go

@@ -183,18 +183,6 @@ func (tx *EthTxArgs) ToSignedMessage() (*types.SignedMessage, error) {
 
 }
 
-func (tx *EthTxArgs) HashedOriginalRlpMsg() ([]byte, error) {
-	msg, err := tx.OriginalRlpMsg()
-	if err != nil {
-		return nil, err
-	}
-
-	hasher := sha3.NewLegacyKeccak256()
-	hasher.Write(msg)
-	hash := hasher.Sum(nil)
-	return hash, nil
-}
-
 func (tx *EthTxArgs) OriginalRlpMsg() ([]byte, error) {
 	chainId, err := formatInt(tx.ChainID)
 	if err != nil {