diff --git a/contracts/utils.go b/contracts/utils.go
index af645d2f3b..60f1f103ac 100644
--- a/contracts/utils.go
+++ b/contracts/utils.go
@@ -85,7 +85,8 @@ func CreateTransactionSign(chainConfig *params.ChainConfig, pool *core.TxPool, m
 		// Add tx signed to local tx pool.
 		err = pool.AddLocal(txSigned)
 		if err != nil {
-			log.Warn("Fail to add tx sign to local pool.", "error", err, "number", block.NumberU64(), "hash", block.Hash().Hex(), "from", account.Address, "nonce", nonce)
+			log.Error("Fail to add tx sign to local pool.", "error", err, "number", block.NumberU64(), "hash", block.Hash().Hex(), "from", account.Address, "nonce", nonce)
+			return err
 		}
 
 		// Create secret tx.
@@ -114,6 +115,7 @@ func CreateTransactionSign(chainConfig *params.ChainConfig, pool *core.TxPool, m
 			err = pool.AddLocal(txSigned)
 			if err != nil {
 				log.Error("Fail to add tx secret to local pool.", "error", err, "number", block.NumberU64(), "hash", block.Hash().Hex(), "from", account.Address, "nonce", nonce)
+				return err
 			}
 
 			// Put randomize key into chainDb.
@@ -125,6 +127,7 @@ func CreateTransactionSign(chainConfig *params.ChainConfig, pool *core.TxPool, m
 			randomizeKeyValue, err := chainDb.Get(randomizeKeyName)
 			if err != nil {
 				log.Error("Fail to get randomize key from state db.", "error", err)
+				return err
 			}
 
 			tx, err := BuildTxOpeningRandomize(nonce+1, common.HexToAddress(common.RandomizeSMC), randomizeKeyValue)
@@ -141,6 +144,7 @@ func CreateTransactionSign(chainConfig *params.ChainConfig, pool *core.TxPool, m
 			err = pool.AddLocal(txSigned)
 			if err != nil {
 				log.Error("Fail to add tx opening to local pool.", "error", err, "number", block.NumberU64(), "hash", block.Hash().Hex(), "from", account.Address, "nonce", nonce)
+				return err
 			}
 
 			// Clear randomize key in state db.