diff --git a/webapp/controller/BlockChainController.class.php b/webapp/controller/BlockChainController.class.php
index fbceaabe..ba316ed6 100644
--- a/webapp/controller/BlockChainController.class.php
+++ b/webapp/controller/BlockChainController.class.php
@@ -298,14 +298,14 @@ class BlockChainController extends BaseAuthedController {
         $itemId = V_ITEM_DIAMOND;
         $itemCount = $num;
 
-        $response = services\BlockChainService::gameItemMallBuy(
+        $rspObj = services\BlockChainService::gameItemMallBuy(
             Transaction::BUY_GOODS_ACTION_TYPE,
             $price,
             $itemId,
             $itemCount
         );
 
-        BcOrder::upsert($response['trans_id'], array(
+        BcOrder::upsert($rspObj['trans_id'], array(
             'item_id' => $itemId,
             'item_num' => $itemCount,
             'order_type' => 1,
@@ -317,8 +317,8 @@ class BlockChainController extends BaseAuthedController {
 
         $this->_rspData(
             array(
-                'trans_id' => $response['trans_id'],
-                'params' => $response['params'],
+                'trans_id' => $rspObj['trans_id'],
+                'params' => $rspObj['params'],
                 'item_id' => $itemId,
                 'item_num' => $itemCount
             )