update weit

helper/refill/weit/RefillCallBack.php

@@ -22,7 +22,7 @@ class RefillCallBack implements refill\IRefillCallBack
 
     private function sign($params)
     {
-        $content = $params['mchid'] . $params['pt_order_id'] . $params['mch_order_id'] . $params['op_order_id'] . $params['tel'] . $params['price'] . $params['pay_type'] . $params['status'] . config::KEY;
+        $content = config::MCH_ID . $params['pt_order_id'] . $params['mch_order_id'] . $params['op_order_id'] . $params['tel'] . $params['price'] . $params['pay_type'] . $params['status'] . config::KEY;
         return md5($content);
     }