diff --git a/modules/client/back/methods/tpv-transaction/confirm.js b/modules/client/back/methods/tpv-transaction/confirm.js
index 8c7d10558..8099475d7 100644
--- a/modules/client/back/methods/tpv-transaction/confirm.js
+++ b/modules/client/back/methods/tpv-transaction/confirm.js
@@ -68,7 +68,7 @@ module.exports = Self => {
 
         const cipher = crypto.createDecipheriv('des-ede3-cbc', secretKey, iv);
         cipher.setAutoPadding(false);
-        const orderKey = cipher.update(zeroPad(str, 8), 'utf8', 'base64')
+        const orderKey = cipher.update(zeroPad(orderId, 8), 'utf8', 'base64')
             + cipher.final('utf8');
 
         const res = crypto.createHmac('sha256', Buffer.from(orderKey, 'base64'))
@@ -102,8 +102,4 @@ module.exports = Self => {
         const pad = Buffer.alloc((blocksize - (buffer.length % blocksize)) % blocksize, 0);
         return Buffer.concat([buffer, pad]);
     }
-
-    function base64UrlDecode() {
-
-    }
 };