diff --git a/webapp/controller/BlockChainController.class.php b/webapp/controller/BlockChainController.class.php
index d5e99fce..0443f73d 100644
--- a/webapp/controller/BlockChainController.class.php
+++ b/webapp/controller/BlockChainController.class.php
@@ -302,9 +302,9 @@ class BlockChainController extends BaseAuthedController {
         if (!in_array(
             $tokenType,
             array(
-                'CEG',
-                'USDC',
-                'USDT'
+                BlockChainService::CURRENCY_CEG,
+                BlockChainService::CURRENCY_USDC,
+                BlockChainService::CURRENCY_USDT,
             )
         )) {
             myself()->_rspErr(1, "token_type error");
@@ -314,8 +314,8 @@ class BlockChainController extends BaseAuthedController {
         if (in_array(
             $tokenType,
             array(
-                'USDC',
-                'USDT'
+                BlockChainService::CURRENCY_USDC,
+                BlockChainService::CURRENCY_USDT,
             )
         )) {
             $rate = 10;
diff --git a/webapp/controller/MallController.class.php b/webapp/controller/MallController.class.php
index 774e38a8..f62b91e4 100644
--- a/webapp/controller/MallController.class.php
+++ b/webapp/controller/MallController.class.php
@@ -137,9 +137,9 @@ class MallController extends BaseAuthedController {
         if (!in_array(
             $currency,
             array(
-                'CEG',
-                'USDC',
-                'USDT'
+                BlockChainService::CURRENCY_CEG,
+                BlockChainService::CURRENCY_USDC,
+                BlockChainService::CURRENCY_USDT,
             )
         )) {
             $this->_rspErr(1, 'paramater error currency');