diff --git a/webapp/controller/CallbackController.class.php b/webapp/controller/CallbackController.class.php
index ee96ac24..04268a96 100644
--- a/webapp/controller/CallbackController.class.php
+++ b/webapp/controller/CallbackController.class.php
@@ -1,5 +1,10 @@
 <?php
 
+/*
+  services/callback/common/SignatureService.php
+  需要对web3service回调的做签名校验!!!
+ */
+
 class CallbackController extends BaseController {
 
     private $handlers = array(