diff --git a/sdk-core/src/main/java/org/fisco/bcos/sdk/utils/Hex.java b/sdk-core/src/main/java/org/fisco/bcos/sdk/utils/Hex.java
index 794faa388..bb6c75f19 100644
--- a/sdk-core/src/main/java/org/fisco/bcos/sdk/utils/Hex.java
+++ b/sdk-core/src/main/java/org/fisco/bcos/sdk/utils/Hex.java
@@ -24,6 +24,18 @@
 public class Hex {
     private static final HexEncoder encoder = new HexEncoder();
 
+    public static String addPrefix(String data) {
+        if (Objects.isNull(data)) {
+            return data;
+        }
+
+        if (data.startsWith("0x")) {
+            return data;
+        }
+
+        return "0x" + data;
+    }
+
     public static String trimPrefix(String data) {
         if (Objects.nonNull(data) && data.startsWith("0x")) {
             return data.substring(2);
diff --git a/sdk-transaction/src/main/java/org/fisco/bcos/sdk/transaction/manager/TransactionProcessorFactory.java b/sdk-transaction/src/main/java/org/fisco/bcos/sdk/transaction/manager/TransactionProcessorFactory.java
index 6fb33692d..f32fc31dd 100644
--- a/sdk-transaction/src/main/java/org/fisco/bcos/sdk/transaction/manager/TransactionProcessorFactory.java
+++ b/sdk-transaction/src/main/java/org/fisco/bcos/sdk/transaction/manager/TransactionProcessorFactory.java
@@ -31,10 +31,7 @@ public static Pair<String, String> getChainIdAndGroupId(Client client) {
         String chainId = client.getChainId();
         // get group
         String group = client.getGroup();
-        logger.debug(
-                "createTransactionManager for >=rc2 node, chainId: {}, groupId: {}",
-                chainId,
-                group);
+        logger.debug("createTransactionManager, chainId: {}, groupId: {}", chainId, group);
         return Pair.of(chainId, group);
     }