diff --git a/webapp/mt/HashRateShop.php b/webapp/mt/HashRateShop.php
index f3e65405..e7cb3b7b 100644
--- a/webapp/mt/HashRateShop.php
+++ b/webapp/mt/HashRateShop.php
@@ -6,6 +6,11 @@ use phpcommon;
 
 class HashRateShop {
 
+    const TOTAL_BUY_LIMIT = 0;
+    const DAILY_BUY_LIMIT = 1;
+    const WEEKLY_BUY_LIMIT = 2;
+    const MONTH_BUY_LIMIT = 3;
+
     public static function find($id){
         return getXVal(self::getMetaList(), $id, null);
     }
diff --git a/webapp/services/HashRateShopService.php b/webapp/services/HashRateShopService.php
index 31fa7344..3b2e0210 100644
--- a/webapp/services/HashRateShopService.php
+++ b/webapp/services/HashRateShopService.php
@@ -28,17 +28,17 @@ class HashRateShopService {
             );
             array_push($goodsList, $goodsDto);
             switch ($goodsMeta['limit_type']) {
-                case mt\Shop::DAILY_BUY_LIMIT: {
+                case mt\HashRateShop::DAILY_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsMeta['goods_id']);
                     $goodsDto['bought_times'] = $buyRecord ? $buyRecord['this_day_buy_times'] : 0;
                 }
                     break;
-                case mt\Shop::WEEKLY_BUY_LIMIT: {
+                case mt\HashRateShop::WEEKLY_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsMeta['goods_id']);
                     $goodsDto['bought_times'] = $buyRecord ? $buyRecord['this_week_buy_times'] : 0;
                 }
                     break;
-                case mt\Shop::TOTAL_BUY_LIMIT: {
+                case mt\HashRateShop::TOTAL_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsMeta['goods_id']);
                     $goodsDto['bought_times'] = $buyRecord ? $buyRecord['total_buy_times'] : 0;
                 }
@@ -50,17 +50,6 @@ class HashRateShopService {
 
             $itemMeta = mt\Item::get($goodsMeta['item_id']);
             if ($itemMeta) {
-                /*
-                // 如果是皮肤，判断是否已经拥有，如果已经拥有，不能购买
-                if ($itemMeta['type'] == mt\Item::HERO_SKIN_TYPE) {
-                    $errCode = 0;
-                    $errMsg = '';
-                    if (!self::canBuy($itemMeta, $errCode, $errMsg)) {
-                        $goods['bought_times'] = 1;
-                    } else {
-                        $goods['bought_times'] = 0;
-                    }
-                }*/
             } else if ($goodsMeta['goods_id'] != 9999){
                 error_log('item not found:' . json_encode($goodsMeta));
             }
@@ -77,7 +66,7 @@ class HashRateShopService {
         $goodsId = $goodsMeta['goods_id'];
         {
             switch ($goodsMeta['limit_type']) {
-                case mt\Shop::DAILY_BUY_LIMIT: {
+                case mt\HashRateShop::DAILY_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsId);
                     $boughtTimes = $buyRecord ? $buyRecord['this_day_buy_times'] + 1 : 1;
                     if ($buyRecord && getXVal($buyRecord, 'this_day_buy_times', 0) >= $goodsMeta['limit_num']) {
@@ -87,7 +76,7 @@ class HashRateShopService {
                     }
                 }
                     break;
-                case mt\Shop::WEEKLY_BUY_LIMIT: {
+                case mt\HashRateShop::WEEKLY_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsId);
                     $boughtTimes = $buyRecord ? $buyRecord['this_week_buy_times'] + 1 : 1;
                     if ($buyRecord && getXVal($buyRecord, 'this_week_buy_times', 0) >= $goodsMeta['limit_num']) {
@@ -97,8 +86,7 @@ class HashRateShopService {
                     }
                 }
                     break;
-                case mt\Shop::TOTAL_BUY_LIMIT: {
-                    // error_log("total buy limit " . $address . " " . $goodsId . " " . $goodsMeta['limit_num']);
+                case mt\HashRateShop::TOTAL_BUY_LIMIT: {
                     $buyRecord = getXVal($buyRecordHash, $goodsId);
                     $boughtTimes = $buyRecord ? $buyRecord['total_buy_times'] + 1 : 1;
                     if ($buyRecord && getXVal($buyRecord, 'total_buy_times', 0) >= $goodsMeta['limit_num']) {