diff --git a/pkg/order/mempool/mempool_impl.go b/pkg/order/mempool/mempool_impl.go
index 4290d48..45a471f 100644
--- a/pkg/order/mempool/mempool_impl.go
+++ b/pkg/order/mempool/mempool_impl.go
@@ -155,11 +155,7 @@ func (mpi *mempoolImpl) processTransactions(txs []*pb.Transaction) error {
 	validTxs := make(map[string][]*pb.Transaction)
 	for _, tx := range txs {
 		// check the sequence number of tx
-		txAccount, err := getAccount(tx)
-		if err != nil {
-			mpi.logger.Warningf("get tx account failed, err: %s", err.Error())
-			continue
-		}
+		txAccount := tx.Account()
 		currentSeqNo := mpi.txStore.nonceCache.getPendingNonce(txAccount)
 		if tx.Nonce < currentSeqNo {
 			mpi.logger.Warningf("Account %s, current sequence number is %d, required %d", txAccount, tx.Nonce, currentSeqNo+1)
diff --git a/pkg/order/mempool/util_test.go b/pkg/order/mempool/util_test.go
index 6f1d938..8c0c8ea 100644
--- a/pkg/order/mempool/util_test.go
+++ b/pkg/order/mempool/util_test.go
@@ -1,32 +1,11 @@
 package mempool
 
 import (
-	"fmt"
 	"testing"
 
-	"github.com/meshplus/bitxhub-model/pb"
-
 	"github.com/stretchr/testify/assert"
 )
 
-func TestGetAccount(t *testing.T) {
-	ast := assert.New(t)
-	privKey := genPrivKey()
-	address, _ := privKey.PublicKey().Address()
-	tx := constructIBTPTx(uint64(1), &privKey)
-	addr, err := getAccount(tx)
-	ast.Nil(err)
-	expectedAddr := fmt.Sprintf("%s-%s-%d", address, address, pb.IBTP_INTERCHAIN)
-	ast.Equal(expectedAddr, addr)
-	tx = &pb.Transaction{
-		From: InterchainContractAddr,
-		To:   InterchainContractAddr,
-	}
-	addr, err = getAccount(tx)
-	ast.Nil(err)
-	ast.Equal(addr,InterchainContractAddr.String())
-}
-
 func TestPoolIsFull(t *testing.T) {
 	ast := assert.New(t)
 	mpi, _ := mockMempoolImpl()
diff --git a/pkg/order/mempool/utils.go b/pkg/order/mempool/utils.go
index 820ffeb..4422e28 100644
--- a/pkg/order/mempool/utils.go
+++ b/pkg/order/mempool/utils.go
@@ -1,7 +1,6 @@
 package mempool
 
 import (
-	"fmt"
 	"strconv"
 	"sync/atomic"
 	"time"
@@ -103,11 +102,3 @@ func newTimer(d time.Duration) *timerManager {
 		timeoutEventC: make(chan bool),
 	}
 }
-
-func getAccount(tx *pb.Transaction) (string, error) {
-	if tx.IBTP != nil {
-		account := fmt.Sprintf("%s-%s-%d", tx.IBTP.From, tx.IBTP.To, tx.IBTP.Category())
-		return account, nil
-	}
-	return tx.From.String(), nil
-}