diff --git a/src/main/java/org/bdware/sc/ContractManager.java b/src/main/java/org/bdware/sc/ContractManager.java
index 60fea1b..592e06f 100644
--- a/src/main/java/org/bdware/sc/ContractManager.java
+++ b/src/main/java/org/bdware/sc/ContractManager.java
@@ -1091,8 +1091,7 @@ public class ContractManager {
     }
 
     public synchronized ContractClient getClient(String idOrName) {
-        ContractClient client = statusRecorder.getContractClient(idOrName);
-        return client;
+        return statusRecorder.getContractClient(idOrName);
     }
 
     public void clearCache() {
@@ -1212,6 +1211,15 @@ public class ContractManager {
         executeInternalAsync(client, c, r, cb);
     }
 
+    public void recoverUnitFromCheckPoint(String contractId, String checkPoint) {
+        // TODO
+    }
+
+    public String getCheckPointFromUnit(String contractId) {
+        // TODO
+        return null;
+    }
+
     public String executeLocally(ContractRequest c, OnHashCallback cb) {
         long start = System.currentTimeMillis();
 
@@ -1222,7 +1230,7 @@ public class ContractManager {
         //                        + Thread.currentThread().getId());
         String requestID = c.getRequestID();
         if (c.getContractID() == null) {
-            LOGGER.info("合约Name转为ID error!");
+            LOGGER.error("合约Name转为ID error!");
             ContractResult cr =
                     new ContractResult(
                             Status.Error,
@@ -1379,7 +1387,7 @@ public class ContractManager {
      *
      * @author Kaidong Wu
      */
-    public JsonObject extractEventsFromContractResult(
+    public void extractEventsFromContractResult(
             OnHashCallback ocb,
             JsonObject result,
             ContractClient client,
@@ -1424,7 +1432,6 @@ public class ContractManager {
             }
         } catch (Exception ignored) {
         }
-        return result;
     }
 
     public int countEvents() {