diff --git a/src/main/java/org/bdware/sc/ContractProcess.java b/src/main/java/org/bdware/sc/ContractProcess.java
index d55a54f..ee160e5 100644
--- a/src/main/java/org/bdware/sc/ContractProcess.java
+++ b/src/main/java/org/bdware/sc/ContractProcess.java
@@ -456,7 +456,7 @@ public class ContractProcess {
             JavaScriptEntry.random.setSeed(Integer.parseInt(contract.getID()));
             JavaScriptEntry.numOfCopies = this.contract.getNumOfCopies();
             JavaScriptEntry.shardingID =
-                    this.contract.getShardingId(); // 设置javaScriptEntry中的shadingID
+                    this.contract.getShardingId(); // 设置javaScriptEntry中的shardingID
             // JavaScriptEntry
             String zipPath = contract.getScriptStr();
             if (isArchiveFile(new File(zipPath))) {
diff --git a/src/main/java/org/bdware/sc/boundry/JavaScriptEntry.java b/src/main/java/org/bdware/sc/boundry/JavaScriptEntry.java
index 37e67cf..b436616 100644
--- a/src/main/java/org/bdware/sc/boundry/JavaScriptEntry.java
+++ b/src/main/java/org/bdware/sc/boundry/JavaScriptEntry.java
@@ -59,7 +59,7 @@ public class JavaScriptEntry {
     public static int numOfCopies;
     public static boolean isDebug;
     public static List<REvent> msgList;
-    public static int shadingId;
+    public static int shardingID;
     // private static SM2KeyPair keyPair = new SM2().generateKeyPair(); // TODO ？？ 本地服务器的,39上运行39的
     // public static String privKey;
     // public static String pubKey;
@@ -594,6 +594,23 @@ public class JavaScriptEntry {
         topic_handlers.put(topic, fun);
     }
 
+    /**
+     * subscribe a local event
+     *
+     * @param contractID contractID
+     * @param event      local event topic
+     * @param fun        related handler function
+     * @author Kaidong Wu
+     */
+    public static void subscribe(String contractID, String event, ScriptFunction fun) {
+        String topic = HashUtil.sha3(contractID, event);
+        subscribe(topic, fun, false);
+        if (topic_handlers.containsKey(topic)) {
+            ContractProcess.instance.unSubscribe(topic_handlers.get(topic).getName());
+        }
+        topic_handlers.put(topic, fun);
+    }
+
     private static void subscribe(String topic, ScriptFunction fun, boolean fromPreSub) {
         String reqID =
                 String.format(