improve code

miniprogram/virtualpayment/constant.go

@@ -117,6 +117,9 @@ const (
 
 	// queryPublishGoods 查询批量发布道具任务状态
 	queryPublishGoods = "/xpay/query_publish_goods"
+
+	// defaultUnifiedOrderURL default unified order url
+	defaultUnifiedOrderURL = "requestVirtualPayment"
 )
 
 const (

miniprogram/virtualpayment/virtualpayment.go

@@ -479,6 +479,7 @@ func (s *VirtualPayment) requestAddress(params URLParams) (url string, err error
 	case queryUserBalance:
 	case currencyPay:
 	case cancelCurrencyPay:
+	case defaultUnifiedOrderURL:
 		if params.PaySign, params.Signature, err = s.PaySignature(params.Path, params.Content); err != nil {
 			return
 		}