diff --git a/Data/js/main.js b/Data/js/main.js
index 13b4b80..24e114f 100644
--- a/Data/js/main.js
+++ b/Data/js/main.js
@@ -283,9 +283,6 @@ function beginPay(
   );
 }
 // ======= end of pay =======
-// ======= begin of market =======
-// TODO::
-// ======= end of market =======
 // ======= begin of transaction history =======
 function ethHistory(funId, start, limit) {
   promiseCb(funId, jc.wallet.historySvr.ethRecords(start, limit));
@@ -452,7 +449,33 @@ function marketBuy(funId, orderId, estimate) {
     (v) => JSON.stringify(v)
   );
 }
-
+// buy item of game from market
+function gameMarketBuy(
+  funId,
+  orderId,
+  seller,
+  currency,
+  price,
+  startTime,
+  saltNonce,
+  signature,
+  estimate
+) {
+  promiseCb(
+    funId,
+    jc.wallet.jcStandard.gameMarketBuy({
+      orderId,
+      seller,
+      currency,
+      price,
+      startTime,
+      saltNonce,
+      signature,
+      estimate,
+    }),
+    (v) => JSON.stringify(v)
+  );
+}
 // end of market
 
 // begin of mall