ok

app/Libs/Pay/Merchants/UnionPay.php

@@ -97,6 +97,8 @@ class UnionPay implements PayMerchantInterface
     public static function notify(Request $request, callable $callback)
     {
         $data = $request->all();
+        \Log::info('union_pay.notify: ');
+        \Log::info($data);
         if ($data['status'] === 'TRADE_SUCCESS') {
             $trade_no = $data['merOrderId'];
             if ($trade_no) {