'123'

@@ -72,7 +72,7 @@ class Client extends JssdkClient
     public function appConfig(string $prepayId): array
     public function appConfig(string $prepayId): array
     {
     {
         $params = [
         $params = [
-            'appid' => $this->app['config']->app_id,
+            'appId' => $this->app['config']->app_id,
             'partnerid' => $this->app['config']->mch_id,
             'partnerid' => $this->app['config']->mch_id,
             'prepayid' => $prepayId,
             'prepayid' => $prepayId,
             'noncestr' => uniqid(),
             'noncestr' => uniqid(),