sign cost

app/Modules/User/Services/UserGiftService.php

@@ -67,6 +67,7 @@ where a.status = 1 ORDER  by cost desc';
                 'cost_reward'=>0
             ];
         if($user_gift && $user_gift->num >0){
+            $send_info['cost'] = 0;
             $user_gift->num -=1;
             $user_gift->save();
             return  BookGiftsSend::addGift($send_info);