diff --git a/server/web3sign/controllers/benftmall_trans.js b/server/web3sign/controllers/benftmall_trans.js
index cb41669..eeec201 100644
--- a/server/web3sign/controllers/benftmall_trans.js
+++ b/server/web3sign/controllers/benftmall_trans.js
@@ -11,7 +11,7 @@ async function buyPlanet(session) {
     const netId = session.request('net_id');
     const price = session.request('price');
     const currencyName = session.request('currency_name');
-    const ids = session.request('ids', '');
+    const ids = utils.jsonDecode(session.request('ids', ''));
     const bc = serviceFactory.create('BlockChain');
     {
       const ret = await bc.init(netId);