diff --git a/server/web3sign/controllers/game_item_market.js b/server/web3sign/controllers/game_item_market.js
index 75e19bd..4ab32d7 100644
--- a/server/web3sign/controllers/game_item_market.js
+++ b/server/web3sign/controllers/game_item_market.js
@@ -11,6 +11,8 @@ async function buy(session) {
     const seller = bcutils.toNormalAddress(session.request('seller', ''));
     const netId = session.request('net_id');
     const price = session.request('price');
+    const currencyName = session.request('currency_name');
+    const orderId = session.request('order_id');
     const bc = serviceFactory.create('BlockChain');
     {
       const ret = await bc.init(netId);
@@ -32,11 +34,11 @@ async function buy(session) {
       }
     }
 
-    const currency = bc.getContractAddressByName(contract.CEG_INSTANCE_NAME);
+    const currency = bc.getCurrencyAddressByName(currencyName);
     const userAddress = bc.getUserAddress();
     {
       if (!bc.isValidAddress(currency)) {
-        session.rspErr(500, 'ceg error');
+        session.rspErr(500, 'currency error');
         return;
       }
     }
@@ -66,7 +68,6 @@ async function buy(session) {
         ['trans_id', transId]
       ]);
     const nonce = transId;
-    const orderId = transId;
     const signature = await bc.soliditySha3Sign(
       account,
       seller,