diff --git a/webapp/services/BlockChainService.php b/webapp/services/BlockChainService.php
index accf008e..f572d659 100644
--- a/webapp/services/BlockChainService.php
+++ b/webapp/services/BlockChainService.php
@@ -56,7 +56,7 @@ class BlockChainService {
                 die();
                 return;
             }
-            error_log("gameItemMallBuy:" . $response);
+            error_log("gameItemMallBuy:" . $response . "url:" . $url);
             $rspObj = json_decode($response, true);
             if ($rspObj['errcode'] == 0) {
                 $transId = $rspObj['trans_id'];