diff --git a/build.gradle b/build.gradle
index c84ff70..77d271d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -50,7 +50,7 @@ dependencies {
     testImplementation 'junit:junit:4.13.2'
 }
 group = "org.bdware.sc"
-version = "1.6.1"
+version = "1.6.3"
 
 tasks.processResources.setDuplicatesStrategy(DuplicatesStrategy.INCLUDE)
 
diff --git a/src/main/base/org/bdware/sc/ContractResult.java b/src/main/base/org/bdware/sc/ContractResult.java
index a5fb9ca..97984d0 100644
--- a/src/main/base/org/bdware/sc/ContractResult.java
+++ b/src/main/base/org/bdware/sc/ContractResult.java
@@ -26,6 +26,10 @@ public class ContractResult {
     }
 
     public enum Status {
-        Success, Exception, Error, Executing
+        Success, Exception, Error;
+        public Status merge(Status status) {
+            if (status == null) status = Error;
+            return this.ordinal() < status.ordinal() ? status : this;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/main/base/org/bdware/sc/node/AnnotationHook.java b/src/main/base/org/bdware/sc/node/AnnotationHook.java
index 25e12f3..0cbacc5 100644
--- a/src/main/base/org/bdware/sc/node/AnnotationHook.java
+++ b/src/main/base/org/bdware/sc/node/AnnotationHook.java
@@ -1,8 +1,7 @@
 package org.bdware.sc.node;
 
 import org.bdware.sc.JSEngine;
-import org.bdware.sc.bean.ContractRequest;
 
 public interface AnnotationHook {
-    Object handle(ContractRequest input, JSEngine desktopEngine, Object ret);
+    ArgPacks handle(JSEngine desktopEngine, ArgPacks argPacks);
 }
diff --git a/src/main/base/org/bdware/sc/node/ArgPacks.java b/src/main/base/org/bdware/sc/node/ArgPacks.java
new file mode 100644
index 0000000..a72bf49
--- /dev/null
+++ b/src/main/base/org/bdware/sc/node/ArgPacks.java
@@ -0,0 +1,15 @@
+package org.bdware.sc.node;
+
+import org.bdware.sc.bean.ContractRequest;
+
+public class ArgPacks {
+    public Object ret;
+    public ContractRequest request;
+    public Object arg;
+
+    public ArgPacks(ContractRequest request, Object arg, Object ret) {
+        this.request = request;
+        this.arg = arg;
+        this.ret = ret;
+    }
+}