diff --git a/lib/index.js b/lib/index.js
index b191b0b..24e3eee 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -3,6 +3,7 @@
  */
 
 const HotUpdate = require('react-native').NativeModules.HotUpdate;
+import {NativeAppEventEmitter} from 'react-native';
 
 let host = 'http://update.reactnative.cn/api';
 
@@ -91,3 +92,12 @@ export async function switchVersionLater(hash) {
 export function markSuccess() {
   HotUpdate.markSuccess();
 }
+
+
+//NativeAppEventEmitter.addListener('RCTHotUpdateDownloadProgress',(params)=>{
+//
+//})
+//
+//NativeAppEventEmitter.addListener('RCTHotUpdateUnzipProgress',(params)=>{
+//
+//})
\ No newline at end of file