fix:sig

@@ -85,6 +85,6 @@ class Signature extends Config
      */
      */
     protected function md5(string $body): string
     protected function md5(string $body): string
     {
     {
-        return \md5($body . $this->config->getAppSecret());
+        return \md5($body);
     }
     }
 }
 }