diff --git a/src/main/java/org/bdware/server/nodecenter/LogActions.java b/src/main/java/org/bdware/server/nodecenter/LogActions.java
index e7f28dc..15ce797 100644
--- a/src/main/java/org/bdware/server/nodecenter/LogActions.java
+++ b/src/main/java/org/bdware/server/nodecenter/LogActions.java
@@ -26,17 +26,21 @@ public class LogActions {
         this.managerAction = managerAction;
     }
 
+    private void simpleReply(ResultCallback resultCallback, String action, Object data) {
+        Map<String, Object> jsonResult = new HashMap<>();
+        jsonResult.put("action", action);
+        jsonResult.put("data", data);
+        resultCallback.onResult(jsonResult);
+    }
+
     private void queryInternal(
             String actResp,
             MultiIndexTimeDBUtilIntf db,
             JsonObject json,
             ResultCallback resultCallback) {
         long start = System.currentTimeMillis();
-        Map<String, Object> ret = new HashMap<>();
         if (!json.has("start")) {
-            ret.put("action", actResp);
-            ret.put("data", new ArrayList<>());
-            resultCallback.onResult(JsonUtil.toJson(ret));
+            simpleReply(resultCallback, actResp, new ArrayList<>());
             return;
         }
         long startTime = json.get("start").getAsLong();
@@ -54,12 +58,7 @@ public class LogActions {
             if (str == null) data.put("primary", array);
             else data.put(str, array);
         }
-        ret.put("action", actResp);
-        ret.put("data", data);
-        if (json.has("requestID")) {
-            ret.put("responseID", json.get("requestID"));
-        }
-        resultCallback.onResult(JsonUtil.toJson(ret));
+        simpleReply(resultCallback, actResp, data);
         long end = System.currentTimeMillis();
         LOGGER.debug("[queryInternal:time]" + (end - start));
     }
@@ -69,11 +68,8 @@ public class LogActions {
             MultiIndexTimeDBUtilIntf db,
             JsonObject json,
             ResultCallback resultCallback) {
-        Map<String, Object> ret = new HashMap<>();
         if (!json.has("start")) {
-            ret.put("action", actResp);
-            ret.put("data", new ArrayList<>());
-            resultCallback.onResult(JsonUtil.toJson(ret));
+            simpleReply(resultCallback, actResp, new ArrayList<>());
             return;
         }
         long startTime = json.get("start").getAsLong();
@@ -92,12 +88,7 @@ public class LogActions {
             if (str == null) data.add("primary", array);
             else data.add(str, array);
         }
-        ret.put("action", actResp);
-        ret.put("data", data);
-        if (json.has("requestID")) {
-            ret.put("responseID", json.get("requestID"));
-        }
-        resultCallback.onResult(JsonUtil.toJson(ret));
+        simpleReply(resultCallback, actResp, data);
     }
 
     @Action(userPermission = 1 << 8, async = true)
@@ -127,12 +118,11 @@ public class LogActions {
         long start = System.currentTimeMillis();
         long userList = KeyValueDBUtil.instance.getCount(NCTables.NodeUser.toString());
         long applylist = KeyValueDBUtil.instance.getCount(NCTables.ApplyRole.toString());
-        resultCallback.onResult(
-                "{\"action\":\"onQueryUserStat\",\"userListCount\":"
-                        + userList
-                        + ",\"applyListCount\":"
-                        + applylist
-                        + "}");
+        JsonObject jsonResult = new JsonObject();
+        jsonResult.addProperty("action", "onQueryUserStat");
+        jsonResult.addProperty("userListCount", userList);
+        jsonResult.addProperty("applyListCount", applylist);
+        resultCallback.onResult(jsonResult);
         long end = System.currentTimeMillis();
         LOGGER.debug("[queryUserStat:time]" + (end - start));
     }
@@ -164,7 +154,7 @@ public class LogActions {
             ret.put("action", "onListNodes");
             ret.put("online", onlineNodes);
             ret.put("offline", dbnodes);
-            resultCallback.onResult(JsonUtil.toJson(ret));
+            resultCallback.onResult(ret);
             return;
         }
         for (Map.Entry<String, CMNode> entry : nodeinfos.entrySet()) {
@@ -178,7 +168,7 @@ public class LogActions {
         ret.put("online", cinodeinfos);
         ret.put("offline", new ArrayList<String>());
         // 合约管理员看不到offline nodes
-        resultCallback.onResult(JsonUtil.toJson(ret));
+        resultCallback.onResult(ret);
         long end = System.currentTimeMillis();
         LOGGER.debug("[listNodes:time]" + (end - start));
     }
diff --git a/src/main/java/org/bdware/server/nodecenter/MetaIndexAction.java b/src/main/java/org/bdware/server/nodecenter/MetaIndexAction.java
index 5b8663b..68f7995 100644
--- a/src/main/java/org/bdware/server/nodecenter/MetaIndexAction.java
+++ b/src/main/java/org/bdware/server/nodecenter/MetaIndexAction.java
@@ -97,7 +97,7 @@ public class MetaIndexAction { // public static IndexWriter indexWriter;
                     if (null != thisDesp.contractName && (docs.scoreDocs == null || docs.scoreDocs.length == 0)) {
                         req.addProperty("action", "requestReadMe");
                         req.addProperty("contractID", thisDesp.contractID);
-                        rc.onResult(req.toString());
+                        rc.onResult(req);
                         LOGGER.info("contract " + thisDesp.contractName + " --> actually to index");
                         continue;
                     }
@@ -107,7 +107,7 @@ public class MetaIndexAction { // public static IndexWriter indexWriter;
             }
             req.addProperty("action", "requestReadMe");
             req.addProperty("contractID", thisDesp.contractID);
-            rc.onResult(req.toString());
+            rc.onResult(req);
             LOGGER.info("contract " + thisDesp.contractName + " --> actually to index");
         }
         if (null != indexReader) {
@@ -473,7 +473,7 @@ public class MetaIndexAction { // public static IndexWriter indexWriter;
         System.out.println("zzzResult" + result);
         object.add("result", JsonParser.parseString(result));
         object.addProperty("action", "getMetabyReadme");
-        rc.onResult(object.toString());
+        rc.onResult(object);
     }
 
     @Action(async = true, userPermission = 1L)
@@ -501,7 +501,7 @@ public class MetaIndexAction { // public static IndexWriter indexWriter;
             // TODO Auto-generated catch block
             e.printStackTrace();
         } finally {
-            rc.onResult(object.toString());
+            rc.onResult(object);
             try {
                 stream.close();
             } catch (IOException e) {
@@ -518,7 +518,7 @@ public class MetaIndexAction { // public static IndexWriter indexWriter;
         if (json.has("requestID")) object.add("responseID", json.get("requestID"));
         object.add("result", JsonParser.parseString(result));
         object.addProperty("action", "getMetabyCID");
-        rc.onResult(object.toString());
+        rc.onResult(object);
     }
 
     @Action(async = true, userPermission = 1L)
@@ -528,7 +528,7 @@ public class MetaIndexAction { // public static IndexWriter indexWriter;
         if (json.has("requestID")) object.add("responseID", json.get("requestID"));
         object.add("result", JsonParser.parseString(result));
         object.addProperty("action", "getMetabyOwner");
-        rc.onResult(object.toString());
+        rc.onResult(object);
     }
 
     @Action(async = true, userPermission = 1L)
@@ -538,7 +538,7 @@ public class MetaIndexAction { // public static IndexWriter indexWriter;
         if (json.has("requestID")) object.add("responseID", json.get("requestID"));
         object.add("result", JsonParser.parseString(result));
         object.addProperty("action", "getMetabyPubkey");
-        rc.onResult(object.toString());
+        rc.onResult(object);
     }
 
     @Action(async = true, userPermission = 1L)
diff --git a/src/main/java/org/bdware/server/nodecenter/NCManagerAction.java b/src/main/java/org/bdware/server/nodecenter/NCManagerAction.java
index b6d5696..1d3c12f 100644
--- a/src/main/java/org/bdware/server/nodecenter/NCManagerAction.java
+++ b/src/main/java/org/bdware/server/nodecenter/NCManagerAction.java
@@ -49,7 +49,12 @@ public class NCManagerAction {
                 && !StringUtil.isNullOrEmpty(pubkey)
                 && pubkey.equals(ret);
     }
-
+    private void simpleReply(ResultCallback resultCallback, String action, String data){
+        JsonObject jsonResult = new JsonObject();
+        jsonResult.addProperty("action", action);
+        jsonResult.addProperty("data", data);
+        resultCallback.onResult(jsonResult);
+    }
     @Action(userPermission = 0)
     public void getNodeSessionID(JsonObject json, ResultCallback resultCallback) {
         getSessionID(json, resultCallback);
@@ -59,10 +64,10 @@ public class NCManagerAction {
     public void getSessionID(JsonObject json, ResultCallback resultCallback) {
         long start = System.currentTimeMillis();
         sessionID = random.nextLong() + "_session";
-        Map<String, String> result = new HashMap<>();
-        result.put("action", "onSessionID");
-        result.put("session", sessionID);
-        resultCallback.onResult(JsonUtil.toJson(result));
+        JsonObject result = new JsonObject();
+        result.addProperty("action", "onSessionID");
+        result.addProperty("session", sessionID);
+        resultCallback.onResult(result);
         long end = System.currentTimeMillis();
         LOGGER.debug("time:" + (end - start) + "data:" + JsonUtil.toJson(result));
     }
@@ -75,13 +80,12 @@ public class NCManagerAction {
     @Action(userPermission = 0)
     public void getManagerPubkey(JsonObject json, ResultCallback resultCallback) {
         String ret = KeyValueDBUtil.instance.getValue(NCTables.ConfigDB.toString(), centerManger);
-        resultCallback.onResult("{\"action\":\"onGetManagerPubkey\",\"data\":\"" + ret + "\"}");
+        simpleReply(resultCallback,"onGetManagerPubkey",ret);
     }
 
     public void getRole(JsonObject json, ResultCallback resultCallback) {
         if (pubKey == null) {
-            resultCallback.onResult(
-                    "{\"action\":\"onLogin\",\"data\":\"" + Role.Anonymous.name() + "\"}");
+            simpleReply(resultCallback,"onLogin",Role.Anonymous.name());
             return;
         }
         try {
@@ -103,26 +107,25 @@ public class NCManagerAction {
                     role = Role.Anonymous.name();
                 }
                 handler.setPermission(Role.compoundValue(role.split(",")));
-                resultCallback.onResult("{\"action\":\"onLogin\",\"data\":\"" + role + "\"}");
+                simpleReply(resultCallback,"onLogin",role);
             } else {
                 KeyValueDBUtil.instance.setValue(
                         NCTables.ConfigDB.toString(), centerManger, pubKey);
                 handler.setPermission(0x30000ffL);
-                resultCallback.onResult("{\"action\":\"onLogin\",\"data\":\"CenterManager\"}");
+                simpleReply(resultCallback,"onLogin","CenterManager");
             }
         } catch (Exception e) {
             e.printStackTrace();
-            resultCallback.onResult(
-                    "{\"action\":\"onLogin\",\"data\":\"" + Role.Anonymous.name() + "\"}");
+            simpleReply(resultCallback,"onLogin",Role.Anonymous.name());
         }
     }
 
     @Action(userPermission = 0)
     public void login(JsonObject json, ResultCallback resultCallback) {
         long start = System.currentTimeMillis();
+        JsonObject jsonResult = new JsonObject();
         if (sessionID == null) {
-            resultCallback.onResult(
-                    "{\"action\":\"onLogin\",\"data\":\"" + Role.Anonymous.name() + "\"}");
+            simpleReply(resultCallback,"onLogin",Role.Anonymous.name());
             return;
         }
         String signature = json.get("signature").getAsString();
@@ -135,8 +138,7 @@ public class NCManagerAction {
             LOGGER.debug("设置公钥" + pubKey);
             getRole(json, resultCallback);
         } else {
-            resultCallback.onResult(
-                    "{\"action\":\"onLogin\",\"data\":\"" + Role.Anonymous.name() + "\"}");
+            simpleReply(resultCallback,"onLogin",Role.Anonymous.name());
         }
         long end = System.currentTimeMillis();
         LOGGER.debug("time:" + (end - start));
@@ -146,7 +148,7 @@ public class NCManagerAction {
     public void applyRole(JsonObject json, ResultCallback resultCallback) {
         long start = System.currentTimeMillis();
         if (pubKey == null) {
-            resultCallback.onResult("{\"action\":\"onApplyRole\",\"data\":\"missing pubKey\"}");
+            simpleReply(resultCallback,"onApplyRole","missing pubKey");
             return;
         }
         if (json.has("role")) {
@@ -156,7 +158,7 @@ public class NCManagerAction {
                 return;
             }
         }
-        resultCallback.onResult("{\"action\":\"onApplyRole\",\"data\":\"failed\"}");
+        simpleReply(resultCallback,"onApplyRole","failed");
     }
 
     @Action(userPermission = 1 << 6)
@@ -170,10 +172,10 @@ public class NCManagerAction {
                     NCTables.NodeTime.toString(),
                     json.get("nodePubKey").getAsString(),
                     Long.toString(new Date().getTime()));
-            resultCallback.onResult("{\"action\":\"onAddNodes\",\"data\":\"success\"}");
+            simpleReply(resultCallback,"onAddNodes","success");
         } catch (Exception e) {
             e.printStackTrace();
-            resultCallback.onResult("{\"action\":\"onAddNodes\",\"data\":\"failed\"}");
+            simpleReply(resultCallback,"onAddNodes","failed");
         }
     }
 
@@ -181,7 +183,7 @@ public class NCManagerAction {
         String str = KeyValueDBUtil.instance.getValue(NCTables.ApplyRole.toString(), pubKey);
         String already = KeyValueDBUtil.instance.getValue(NCTables.NodeUser.toString(), pubKey);
         if (already != null && already.contains(role.toString())) {
-            resultCallback.onResult("{\"action\":\"onApplyRole\",\"data\":\"already has!\"}");
+            simpleReply(resultCallback,"onApplyRole","already has!");
             return;
         }
         if (str == null || str.length() == 0) {
@@ -196,7 +198,7 @@ public class NCManagerAction {
                         NCTables.ApplyTime.toString(), pubKey, Long.toString(new Date().getTime()));
             }
         }
-        resultCallback.onResult("{\"action\":\"onApplyRole\",\"data\":\"success\"}");
+        simpleReply(resultCallback,"onApplyRole","success!");
     }
 
     @Action(userPermission = 1 << 3)
@@ -204,12 +206,12 @@ public class NCManagerAction {
         List<KV> kv = KeyValueDBUtil.instance.getKeyValues(NCTables.NodeUser.toString());
         List<KV> time = KeyValueDBUtil.instance.getKeyValues(NCTables.NodeTime.toString());
         Map<String, Object> ret = new HashMap<>();
-        ResultBack result = new ResultBack();
         ret.put("kv", kv);
         ret.put("time", time);
-        result.action = "onListAllUsers";
-        result.data = ret;
-        resultCallback.onResult(JsonUtil.toJson(result));
+        Map<String, Object> result = new HashMap<>();
+        result.put("action", "onListAllUsers");
+        result.put("data", ret);
+        resultCallback.onResult(result);
     }
 
     @Action(userPermission = 1 << 2)
@@ -219,20 +221,21 @@ public class NCManagerAction {
         boolean isAccept = json.get("isAccept").getAsBoolean();
         LOGGER.debug("[NCManagerAction] " + json.toString());
         if (pubKey == null || pubKey.length() == 0) {
-            resultCallback.onResult(
-                    "{\"action\":\"onAuthNodeManager\",\"data\":\"missing pubKey\"}");
+            simpleReply(resultCallback,"onAuthNodeManager","missing pubKey");
             return;
         }
         if (!isAccept) {
             KeyValueDBUtil.instance.delete(NCTables.ApplyRole.toString(), pubKey);
             KeyValueDBUtil.instance.delete(NCTables.ApplyTime.toString(), pubKey);
-            resultCallback.onResult("{\"action\":\"onAuthNodeManager\",\"data\":\"success\"}");
+            simpleReply(resultCallback,"onAuthNodeManager","success");
             return;
         }
         String already = KeyValueDBUtil.instance.getValue(NCTables.NodeUser.toString(), pubKey);
         String roles = KeyValueDBUtil.instance.getValue(NCTables.ApplyRole.toString(), pubKey);
         if (roles == null || roles.length() == 0) {
-            resultCallback.onResult("{\"action\":\"onAuthNodeManager\",\"data\":\"empty apply\"}");
+            KeyValueDBUtil.instance.delete(NCTables.ApplyRole.toString(), pubKey);
+            KeyValueDBUtil.instance.delete(NCTables.ApplyTime.toString(), pubKey);
+            simpleReply(resultCallback,"onAuthNodeManager","empty apply!");
             return;
         }
         if (already != null && already.length() > 0) {
@@ -240,13 +243,12 @@ public class NCManagerAction {
         } else {
             already = roles;
         }
-
         KeyValueDBUtil.instance.setValue(NCTables.NodeUser.toString(), pubKey, already);
         KeyValueDBUtil.instance.setValue(
                 NCTables.NodeTime.toString(), pubKey, Long.toString(new Date().getTime()));
         KeyValueDBUtil.instance.delete(NCTables.ApplyRole.toString(), pubKey);
         KeyValueDBUtil.instance.delete(NCTables.ApplyTime.toString(), pubKey);
-        resultCallback.onResult("{\"action\":\"onAuthNodeManager\",\"data\":\"success\"}");
+        simpleReply(resultCallback,"onAuthNodeManager","success");
         long end = System.currentTimeMillis();
         LOGGER.debug("[authNodeManager:time]" + (end - start));
     }
@@ -259,10 +261,10 @@ public class NCManagerAction {
         Map<String, Object> ret = new HashMap<>();
         ret.put("kv", kv);
         ret.put("time", time);
-        ResultBack result = new ResultBack();
-        result.action = "onListApplyList";
-        result.data = ret;
-        resultCallback.onResult(JsonUtil.toJson(result));
+        Map<String, Object> result = new HashMap<>();
+        result.put("action", "onListApplyList");
+        result.put("data", ret);
+        resultCallback.onResult(result);
         long end = System.currentTimeMillis();
         LOGGER.debug("[listApplyList:time]" + (end - start));
     }
@@ -272,7 +274,7 @@ public class NCManagerAction {
         String pubKey = json.get("pubKey").getAsString();
         KeyValueDBUtil.instance.delete(NCTables.NodeUser.toString(), pubKey);
         KeyValueDBUtil.instance.delete(NCTables.NodeTime.toString(), pubKey);
-        resultCallback.onResult("{\"action\":\"onDelete\",\"data\":\"success\"}");
+        simpleReply(resultCallback,"onDelete","success");
     }
 
     @Action(userPermission = 1 << 4)
@@ -280,16 +282,22 @@ public class NCManagerAction {
         long start = System.currentTimeMillis();
         String licence = KeyValueDBUtil.instance.getValue(NCTables.ConfigDB.toString(), Licence);
         if (licence == null || licence.length() == 0) {
-            resultCallback.onResult(
-                    "{\"action\":\"onListLicence\",\"nodeCount\":" + 0 + ",\"dueDate\":\"已过期\"}");
+            JsonObject jsonResult = new JsonObject();
+            jsonResult.addProperty("action", "onListLicence");
+            jsonResult.addProperty("nodeCount", 0);
+            jsonResult.addProperty("dueDate", "已过期");
+            resultCallback.onResult(jsonResult);
             return;
         }
         json = JsonParser.parseString(licence).getAsJsonObject();
         String sign = json.get("sign").getAsString();
         String content = json.get("content").getAsString();
         if (StringUtil.isNullOrEmpty(sign) || StringUtil.isNullOrEmpty(content)) {
-            resultCallback.onResult(
-                    "{\"action\":\"onListLicence\",\"nodeCount\":0,\"dueDate\":\"已过期\"}");
+            JsonObject jsonResult = new JsonObject();
+            jsonResult.addProperty("action", "onListLicence");
+            jsonResult.addProperty("nodeCount", 0);
+            jsonResult.addProperty("dueDate", "已过期");
+            resultCallback.onResult(jsonResult);
             return;
         }
         long expiredDate;
@@ -299,30 +307,38 @@ public class NCManagerAction {
             nodeCount = jo.get("nodeCount").getAsLong();
             expiredDate = jo.get("expiredDate").getAsLong();
         } catch (Exception e) {
-            resultCallback.onResult(
-                    "{\"action\":\"onListLicence\",\"nodeCount\":0,\"dueDate\":\"已过期\"}");
+            JsonObject jsonResult = new JsonObject();
+            jsonResult.addProperty("action", "onListLicence");
+            jsonResult.addProperty("nodeCount", 0);
+            jsonResult.addProperty("dueDate", "已过期");
+            resultCallback.onResult(jsonResult);
             return;
         }
         if (expiredDate == 0 || nodeCount == 0) {
-            resultCallback.onResult(
-                    "{\"action\":\"onListLicence\",\"nodeCount\":0,\"dueDate\":\"已过期\"}");
+            JsonObject jsonResult = new JsonObject();
+            jsonResult.addProperty("action", "onListLicence");
+            jsonResult.addProperty("nodeCount", 0);
+            jsonResult.addProperty("dueDate", "已过期");
+            resultCallback.onResult(jsonResult);
             return;
         }
         SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
         boolean verify =
                 SM2Util.verify(licencePub, content.getBytes(), ByteUtils.fromHexString(sign));
         if (verify) {
-            resultCallback.onResult(
-                    "{\"action\":\"onListLicence\",\"nodeCount\":"
-                            + nodeCount
-                            + ",\"dueDate\":\""
-                            + format.format(new Date(expiredDate))
-                            + "\"}");
+            JsonObject jsonResult = new JsonObject();
+            jsonResult.addProperty("action", "onListLicence");
+            jsonResult.addProperty("nodeCount", nodeCount);
+            jsonResult.addProperty("dueDate", format.format(new Date(expiredDate)));
+            resultCallback.onResult(jsonResult);
             long end = System.currentTimeMillis();
             LOGGER.debug("[listLicence:time]" + (end - start));
         } else {
-            resultCallback.onResult(
-                    "{\"action\":\"onListLicence\",\"nodeCount\":0,\"dueDate\":\"已过期\"}");
+            JsonObject jsonResult = new JsonObject();
+            jsonResult.addProperty("action", "onListLicence");
+            jsonResult.addProperty("nodeCount", 0);
+            jsonResult.addProperty("dueDate", "已过期");
+            resultCallback.onResult(jsonResult);
             long end = System.currentTimeMillis();
             LOGGER.debug("[listLicence:time]" + (end - start));
         }
@@ -334,8 +350,7 @@ public class NCManagerAction {
         String sign = json.get("sign").getAsString();
         String content = json.get("content").getAsString();
         if (StringUtil.isNullOrEmpty(sign) || StringUtil.isNullOrEmpty(content)) {
-            resultCallback.onResult(
-                    "{\"action\":\"onUpdateLicence\",\"data\":\"missing signature or content\"}");
+            simpleReply(resultCallback,"onUpdateLicence","missing signature or content");
             return;
         }
         long expiredDate;
@@ -348,18 +363,16 @@ public class NCManagerAction {
             uuid = jo.get("uuid").getAsString();
 
         } catch (Exception e) {
-            resultCallback.onResult("{\"action\":\"onUpdateLicence\",\"data\":\"content error\"}");
+            simpleReply(resultCallback,"onUpdateLicence","content error");
             return;
         }
         if (expiredDate == 0 || nodeCount == 0) {
-            resultCallback.onResult(
-                    "{\"action\":\"onUpdateLicence\",\"data\":\"parse expiredDate/nodeCount error\"}");
+            simpleReply(resultCallback,"onUpdateLicence","parse expiredDate/nodeCount error");
             return;
         }
         if (!uuid.equals(
                 ByteUtil.encodeBASE64(HardwareInfo.getCPUID().getBytes()).replaceAll("\n", ""))) {
-            resultCallback.onResult(
-                    "{\"action\":\"onUpdateLicence\",\"data\":\"invalid licence\"}");
+            simpleReply(resultCallback,"onUpdateLicence","invalid licence");
             return;
         }
         boolean verify =
@@ -368,11 +381,11 @@ public class NCManagerAction {
         if (verify) {
             KeyValueDBUtil.instance.setValue(
                     NCTables.ConfigDB.toString(), Licence, json.toString());
-            resultCallback.onResult("{\"action\":\"onUpdateLicence\",\"data\":\"success\"}");
+            simpleReply(resultCallback,"onUpdateLicence","success");
             long end = System.currentTimeMillis();
             LOGGER.debug("[listLicence:time]" + (end - start));
             return;
-        } else resultCallback.onResult("{\"action\":\"onUpdateLicence\",\"data\":\"failed\"}");
+        } else simpleReply(resultCallback,"onUpdateLicence","failed");
         long end = System.currentTimeMillis();
         LOGGER.debug("[updateLicence:time]" + (end - start));
     }
@@ -383,7 +396,7 @@ public class NCManagerAction {
         result.put("action", "onGetOtherNC");
         String s = OtherNCProxy.instance.getOtherNCs().replace(";", " ");
         result.put("address", s);
-        resultCallback.onResult(JsonUtil.toJson(result));
+        resultCallback.onResult(result);
     }
 
     // 改为NodeManager权限
@@ -391,11 +404,10 @@ public class NCManagerAction {
     public void changeOtherNC(JsonObject json, ResultCallback resultCallback) {
         String add = json.get("data").getAsString().replace(" ", ";");
         String s = OtherNCProxy.instance.setOtherNCs(add).replace(";", " ");
-
-        Map<String, String> result = new HashMap<>();
-        result.put("action", "onGetOtherNC");
-        result.put("address", s);
-        resultCallback.onResult(JsonUtil.toJson(result));
+        JsonObject result = new JsonObject();
+        result.addProperty("action", "onGetOtherNC");
+        result.addProperty("address", s);
+        resultCallback.onResult(result);
     }
 
     // NodeManager权限
@@ -403,21 +415,19 @@ public class NCManagerAction {
     public void changeNCFile(JsonObject json, ResultCallback resultCallback) {
         String add = json.get("data").getAsString();
         String s = OtherNCProxy.instance.setNCFile(add);
-
-        Map<String, String> result = new HashMap<>();
-        result.put("action", "onGetNCFile");
-        result.put("fileName", s);
-        resultCallback.onResult(JsonUtil.toJson(result));
+        JsonObject result = new JsonObject();
+        result.addProperty("action", "onGetNCFile");
+        result.addProperty("fileName", s);
+        resultCallback.onResult(result);
     }
 
     @Action(userPermission = 1 << 9)
     public void getNCFile(JsonObject json, ResultCallback resultCallback) {
         String s = OtherNCProxy.instance.getNCFile();
-
         Map<String, String> result = new HashMap<>();
         result.put("action", "onGetNCFile");
         result.put("fileName", s);
-        resultCallback.onResult(JsonUtil.toJson(result));
+        resultCallback.onResult(result);
     }
 
     // TODO 迁移合约实例（从节点A将合约M的实例迁移到节点B）的权限?
@@ -427,7 +437,6 @@ public class NCManagerAction {
     @Action(userPermission = 0)
     public void transferContractInstance(JsonObject json, ResultCallback resultCallback) {
         LOGGER.info("transferContractInstance");
-
         String node1ID = json.get("node1ID").getAsString();
         String node2ID = json.get("node2ID").getAsString();
         String contractID = json.get("contractID").getAsString();
@@ -468,6 +477,6 @@ public class NCManagerAction {
                         + node1ID
                         + " to node:"
                         + node2ID);
-        resultCallback.onResult(JsonUtil.toJson(result));
+        resultCallback.onResult(result);
     }
 }
diff --git a/src/main/java/org/bdware/server/nodecenter/NodeCenterWSFrameHandler.java b/src/main/java/org/bdware/server/nodecenter/NodeCenterWSFrameHandler.java
index 827c656..c79d560 100644
--- a/src/main/java/org/bdware/server/nodecenter/NodeCenterWSFrameHandler.java
+++ b/src/main/java/org/bdware/server/nodecenter/NodeCenterWSFrameHandler.java
@@ -16,6 +16,7 @@ import org.bdware.server.action.ActionExecutor;
 
 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
+import java.util.Map;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
@@ -33,8 +34,6 @@ public class NodeCenterWSFrameHandler extends SimpleChannelInboundHandler<WebSoc
         managerAction = new NCManagerAction(this);
         logActions = new LogActions(managerAction);
         unitActions = new UnitActions(managerAction);
-
-
         ae =
                 new ActionExecutor<ResultCallback, JsonObject>(
                         executorService, managerAction, logActions, unitActions, new MetaIndexAction(), new TracingAction()) {
@@ -111,10 +110,27 @@ public class NodeCenterWSFrameHandler extends SimpleChannelInboundHandler<WebSoc
                     }
                 }
                 String action = map.get("action").getAsString();
+                final JsonObject jmap = map;
                 ae.handle(
                         action,
                         map,
                         new ResultCallback() {
+                            @Override
+                            public void onResult(Map jo) {
+                                if (jmap.has("requestID")) {
+                                    jo.put("responseID", jmap.get("requestID"));
+                                }
+                                onResult(JsonUtil.toJson(jo));
+                            }
+
+                            @Override
+                            public void onResult(JsonObject jo) {
+                                if (jmap.has("requestID")) {
+                                    jo.add("responseID", jmap.get("requestID"));
+                                }
+                                onResult(jo.toString());
+                            }
+
                             @Override
                             public void onResult(String ret) {
                                 if (ret != null)
diff --git a/src/main/java/org/bdware/server/nodecenter/TracingAction.java b/src/main/java/org/bdware/server/nodecenter/TracingAction.java
index f926228..e3f4720 100644
--- a/src/main/java/org/bdware/server/nodecenter/TracingAction.java
+++ b/src/main/java/org/bdware/server/nodecenter/TracingAction.java
@@ -52,10 +52,8 @@ public class TracingAction {
     public void getDependentContract(JsonObject json, ResultCallback rc) {
         JsonObject result = getDependentContract(json);
         JsonObject jo = new JsonObject();
-        if (json.has("requestID"))
-            jo.add("responseID", json.get("requestID"));
         jo.add("result", result);
         jo.addProperty("action", "onGetDependentContract");
-        rc.onResult(jo.toString());
+        rc.onResult(jo);
     }
 }
diff --git a/src/main/java/org/bdware/server/nodecenter/UnitActions.java b/src/main/java/org/bdware/server/nodecenter/UnitActions.java
index 3c5c6d9..5982360 100644
--- a/src/main/java/org/bdware/server/nodecenter/UnitActions.java
+++ b/src/main/java/org/bdware/server/nodecenter/UnitActions.java
@@ -19,7 +19,12 @@ public class UnitActions {
     public UnitActions(NCManagerAction managerAction) {
         this.managerAction = managerAction;
     }
-
+    private void simpleReply(ResultCallback resultCallback, String action, Object data){
+        Map<String,Object> jsonResult = new HashMap<>();
+        jsonResult.put("action", action);
+        jsonResult.put("data", data);
+        resultCallback.onResult(jsonResult);
+    }
     private static String convertContractName(String contractID) {
         ContractDesp desp = NodeCenterActions.getContractByName(contractID);
         if (desp != null) return desp.contractID;
@@ -36,18 +41,13 @@ public class UnitActions {
     public void listTrustUnits(JsonObject json, ResultCallback resultCallback) {
         long start = System.currentTimeMillis();
         final String pubKey = managerAction.pubKey;
-        Map<String, Object> ret = new HashMap<>();
         List<KV> allunits = KeyValueDBUtil.instance.getKeyValues(NCTables.TrustUnitsDB.toString());
-
         if (pubKey != null
                 && KeyValueDBUtil.instance
                 .getValue(NCTables.ConfigDB.toString(), "__CenterManager__")
                 .contains(pubKey)) {
+            simpleReply(resultCallback,"onListTrustUnits",allunits);
             LOGGER.debug("is center manager");
-            ret.put("action", "onListTrustUnits");
-            ret.put("data", allunits);
-            LOGGER.debug("[listTrustUnits] " + JsonUtil.toJson(ret));
-            resultCallback.onResult(JsonUtil.toJson(ret));
             long end = System.currentTimeMillis();
             LOGGER.debug("[listTrustUnits:time]" + (end - start));
             return;
@@ -61,10 +61,7 @@ public class UnitActions {
                 ciunits.add(kv);
             }
         }
-        ret.put("action", "onListTrustUnits");
-        ret.put("data", ciunits);
-        LOGGER.debug("[listTrustUnits] " + JsonUtil.toJson(ret));
-        resultCallback.onResult(JsonUtil.toJson(ret));
+        simpleReply(resultCallback,"onListTrustUnits",ciunits);
         long end = System.currentTimeMillis();
         LOGGER.debug("[listTrustUnits:time]" + (end - start));
     }
@@ -80,7 +77,7 @@ public class UnitActions {
         Map<String, Object> ret = new HashMap<>();
         ret.put("action", "onCreateTrustUnit");
         ret.put("status", "Success");
-        resultCallback.onResult(JsonUtil.toJson(ret));
+        resultCallback.onResult(ret);
     }
 
     @Action(userPermission = 1 << 6, async = true)
@@ -99,7 +96,7 @@ public class UnitActions {
         Map<String, Object> ret = new HashMap<>();
         ret.put("action", "onDeleteTrustUnit");
         ret.put("status", "Success");
-        resultCallback.onResult(JsonUtil.toJson(ret));
+        resultCallback.onResult(ret);
     }
 
 //    @Action(async = true)
@@ -119,10 +116,7 @@ public class UnitActions {
                 nodeunits.add(kv);
             }
         }
-        Map<String, Object> ret = new HashMap<>();
-        ret.put("action", "onGetNodeTrustUnits");
-        ret.put("data", nodeunits);
-        resultCallback.onResult(JsonUtil.toJson(ret));
+        simpleReply(resultCallback,"onGetNodeTrustUnits",nodeunits);
     }
 
 //    @Action(async = true, userPermission = 0)
@@ -198,8 +192,6 @@ public class UnitActions {
 
     @Action(async = true, userPermission = 1L << 6)
     public void listContractProcess(JsonObject args, final ResultCallback rc) {
-        Map<String, Object> ret = new HashMap<>();
-        ret.put("action", "onListContractProcess");
         List<ContractDesp> info = new ArrayList<>();
         LOGGER.debug(
                 "[contracts] "
@@ -211,14 +203,11 @@ public class UnitActions {
             ContractDesp desp = NodeCenterActions.getContractByID(key);
             if (desp != null) info.add(desp);
         }
-        ret.put("data", JsonUtil.toJson(info));
-        rc.onResult(JsonUtil.toJson(ret));
+        simpleReply(rc,"onListContractProcess",JsonUtil.toJson(info));
     }
 
     @Action(userPermission = 1 << 6, async = true)
     public void listMultiPointContractProcess(JsonObject json, ResultCallback resultCallback) {
-        Map<String, Object> ret = new HashMap<>();
-        ret.put("action", "onListMultiPointContractProcess");
         List<ContractDesp> info = new ArrayList<>();
         LOGGER.debug(
                 "[contracts] "
@@ -230,8 +219,7 @@ public class UnitActions {
             ContractDesp desp = NodeCenterActions.getContractByID(key);
             if (desp != null) info.add(desp);
         }
-        ret.put("data", JsonUtil.toJson(info));
-        resultCallback.onResult(JsonUtil.toJson(ret));
+        simpleReply(resultCallback,"onListMultiPointContractProcess",JsonUtil.toJson(info));
     }
 
     @Action(userPermission = 1 << 6, async = true)
@@ -398,10 +386,4 @@ public class UnitActions {
 //                        + contract.getID()
 //                        + "\",\"action\":\"onStartTrustfulContract\"}");
 //    }
-
-    private void example() {
-        for (CMNode node : NodeCenterActions.nodeInfos.values()) {
-            // node.connection.executeContractTrustfully(args, rc);
-        }
-    }
 }