diff --git a/unify/pay.go b/unify/pay.go
index 25abe72..77a0602 100644
--- a/unify/pay.go
+++ b/unify/pay.go
@@ -30,6 +30,13 @@ func NewPay(address string, token string) *Pay {
 	}
 }
 
+func (p *Pay) Clone(token string) *Pay {
+	return &Pay{
+		address: p.address,
+		token:   token,
+	}
+}
+
 func (p *Pay) CreateOrder(order *CreateOrderReq) (map[string]interface{}, error) {
 	if order.PayType == "" {
 		errors.New("payType is nil")