diff --git a/server/adminserver/api/v1/system/metaMask.go b/server/adminserver/api/v1/system/metaMask.go
index 393ed29b..338d6aa6 100644
--- a/server/adminserver/api/v1/system/metaMask.go
+++ b/server/adminserver/api/v1/system/metaMask.go
@@ -1,12 +1,9 @@
 package system
 
 import (
-	"crypto/md5"
-	"encoding/hex"
 	"github.com/gin-gonic/gin"
 	"net/http"
-	"q5"
-	"time"
+	. "main/global"
 )
 
 type MetaMaskApi struct {
@@ -21,9 +18,7 @@ func (this *MetaMaskApi) GetNonce(c *gin.Context) {
 		})
 		return
 	}
-	timeUnixNano := time.Now().UnixNano()
-	sum := md5.Sum([]byte(account + "_" + q5.ToString(timeUnixNano)))
-	nonce := hex.EncodeToString(sum[:])
+	nonce := GetSessionMgr().GenNonce()
 	c.JSON(http.StatusOK, gin.H{
 		"code":    0,
 		"message": "success",