diff --git a/webapp/services/BlockChainService.php b/webapp/services/BlockChainService.php
index 5d69381a..4bff62ca 100644
--- a/webapp/services/BlockChainService.php
+++ b/webapp/services/BlockChainService.php
@@ -8,6 +8,8 @@ class BlockChainService {
       注意!!!：
       调用方调用前需要校验actionType和myself()->_getAddress,
       非法的参数，或者签名服挂了，该函数直接中断请求，不会运行到调用方后续逻辑
+
+      trans_id：订单id
      */
 
     public static function gameItemMallBuy($actionType, $price, $itemId, $itemNum)