diff --git a/Tun/PacketTunnelProvider.swift b/Tun/PacketTunnelProvider.swift
index 0cf719a..62a43fd 100644
--- a/Tun/PacketTunnelProvider.swift
+++ b/Tun/PacketTunnelProvider.swift
@@ -17,8 +17,9 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
     private var rootTask: Task<Void, Error>?
     
     override func startTunnel(options: [String: NSObject]?, completionHandler: @escaping (Error?) -> Void) {
+        // 重置通知中心
         SDLTunnelAppNotifier.shared.clear()
-        
+
         // 如果当前在运行状态，不允许重复请求
         guard self.contextActor == nil else {
             completionHandler(TunnelError.invalidContext)
@@ -57,28 +58,18 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
     
     override func handleAppMessage(_ messageData: Data, completionHandler: ((Data?) -> Void)?) {
         // Add code here to handle the message.
-        
         Task {
-            if let message = try? NEMessage(serializedBytes: messageData) {
-                switch message.message {
-                case .exitNodeIpChanged(let exitNodeIpChanged):
-                    let exitNodeIp = exitNodeIpChanged.ip
-                    do {
-                        try await self.contextActor?.updateExitNode(exitNodeIp: exitNodeIp)
-                        var reply = NEReply()
-                        reply.code = 0
-                        reply.message = "操作成功"
-                        completionHandler?(try reply.serializedData())
-                        
-                    } catch let err {
-                        var reply = NEReply()
-                        reply.code = 1
-                        reply.message = err.localizedDescription
-                        completionHandler?(try reply.serializedData())
-                    }
-                case .none:
-                    ()
-                }
+            do {
+                let message = try NEMessage(serializedBytes: messageData)
+                let replyData = try await self.handleAppEvent(message: message)
+                completionHandler?(replyData)
+            } catch let err {
+                var reply = NEReply()
+                reply.code = 1
+                reply.message = err.localizedDescription
+                
+                let errorReplyData = try? reply.serializedData()
+                completionHandler?(errorReplyData)
             }
         }
     }
@@ -92,6 +83,29 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
         // Add code here to wake up.
     }
     
+    private func handleAppEvent(message: NEMessage) async throws -> Data? {
+        switch message.message {
+        case .exitNodeIpChanged(let exitNodeIpChanged):
+            let exitNodeIp = exitNodeIpChanged.ip
+            do {
+                try await self.contextActor?.updateExitNode(exitNodeIp: exitNodeIp)
+                var reply = NEReply()
+                reply.code = 0
+                reply.message = "操作成功"
+                return try reply.serializedData()
+                
+            } catch let err {
+                var reply = NEReply()
+                reply.code = 1
+                reply.message = err.localizedDescription
+                
+                return try reply.serializedData()
+            }
+        case .none:
+            return nil
+        }
+    }
+    
 }
 
 // 获取物理网卡ip地址
diff --git a/punchnet/punchnetApp.swift b/punchnet/punchnetApp.swift
index 5addf40..6b130a7 100644
--- a/punchnet/punchnetApp.swift
+++ b/punchnet/punchnetApp.swift
@@ -86,13 +86,7 @@ struct punchnetApp: App {
 class AppDelegate: NSObject, NSApplicationDelegate {
     
     func applicationWillFinishLaunching(_ notification: Notification) {
-        let shared = UserDefaults(suiteName: SDLNotificationCenter.Configuration.appGroupSuiteName)
-        shared?.set("App says hello", forKey: "test_msg")
-        shared?.synchronize()
         
-        SDLNotificationCenter.shared.addObserver(for: .vpnStatusChanged) { name in
-            NSLog("DarwinNotificationCenter get message: \(name)")
-        }
     }
     
     func applicationShouldTerminate(_ sender: NSApplication) -> NSApplication.TerminateReply {