diff --git a/server/web3bcspider/services/pull_bcevent.js b/server/web3bcspider/services/pull_bcevent.js
index efd3533..b1a2328 100644
--- a/server/web3bcspider/services/pull_bcevent.js
+++ b/server/web3bcspider/services/pull_bcevent.js
@@ -8,10 +8,10 @@ const BaseService = require('./baseservice');
 let g_bcevent_conn = null;
 let lock_times = 0;
 async function getGBcEventConn() {
+  while (lock_times > 0) {
+    await utils.sleep(1);
+  }
   if (!g_bcevent_conn) {
-    while (lock_times > 0) {
-      await utils.sleep(1);
-    }
     ++lock_times;
     try {
       const {err, conn} = await app.getDbConn(constant.BCEVENTDB_NAME);
diff --git a/server/web3sign/controllers/game_item_market.js b/server/web3sign/controllers/game_item_market.js
index 4cb1993..d87188b 100644
--- a/server/web3sign/controllers/game_item_market.js
+++ b/server/web3sign/controllers/game_item_market.js
@@ -8,6 +8,7 @@ const serviceFactory = require('../services/factory');
 async function buy(session) {
   try {
     const account = bcutils.toNormalAddress(session.request('account', ''));
+    const seller = bcutils.toNormalAddress(session.request('seller', ''));
     const netId = session.request('net_id');
     const price = session.request('price');
     const bc = serviceFactory.create('BlockChain');
@@ -24,6 +25,12 @@ async function buy(session) {
         return;
       }
     }
+    {
+      if (!bc.isValidAddress(seller)) {
+        session.rspErr(500, 'seller error');
+        return;
+      }
+    }
 
     const currency = bc.getContractAddressByName(contract.CEG_INSTANCE_NAME);
     const userAddress = bc.getUserAddress();
@@ -61,8 +68,9 @@ async function buy(session) {
     const nonce = transId;
     const orderId = transId;
     const signature = await bc.soliditySha3Sign(
-      orderId,
       account,
+      seller,
+      orderId,
       currency,
       price,
       nowTime,
@@ -70,6 +78,10 @@ async function buy(session) {
     );
 
     const rspParams = [
+      orderId,
+      seller,
+      currency,
+      price,
       nowTime,
       nonce,
       signature