修改退款 bug 及增加付款到零钱的支付 (#373)

* fix refund bug and add transfer to wallet support

* fmt code

* fix golangci-lint

* fix golangci-lint

pay/refund/refund.go

@@ -24,6 +24,7 @@ func NewRefund(cfg *config.Config) *Refund {
 //Params 调用参数
 type Params struct {
 	TransactionID string
+	OutTradeNo    string
 	OutRefundNo   string
 	TotalFee      string
 	RefundFee     string
@@ -39,7 +40,8 @@ type request struct {
 	NonceStr      string `xml:"nonce_str"`
 	Sign          string `xml:"sign"`
 	SignType      string `xml:"sign_type,omitempty"`
-	TransactionID string `xml:"transaction_id"`
+	TransactionID string `xml:"transaction_id,omitempty"`
+	OutTradeNo    string `xml:"out_trade_no,omitempty"`
 	OutRefundNo   string `xml:"out_refund_no"`
 	TotalFee      string `xml:"total_fee"`
 	RefundFee     string `xml:"refund_fee"`
@@ -83,7 +85,12 @@ func (refund *Refund) Refund(p *Params) (rsp Response, err error) {
 	param["refund_fee"] = p.RefundFee
 	param["total_fee"] = p.TotalFee
 	param["sign_type"] = util.SignTypeMD5
-	param["transaction_id"] = p.TransactionID
+	if p.TransactionID != "" {
+		param["transaction_id"] = p.TransactionID
+	}
+	if p.OutTradeNo != "" {
+		param["out_trade_no"] = p.OutTradeNo
+	}
 	if p.NotifyURL != "" {
 		param["notify_url"] = p.NotifyURL
 	}
@@ -101,9 +108,11 @@ func (refund *Refund) Refund(p *Params) (rsp Response, err error) {
 		SignType:      util.SignTypeMD5,
 		TransactionID: p.TransactionID,
 		OutRefundNo:   p.OutRefundNo,
+		OutTradeNo:    p.OutTradeNo,
 		TotalFee:      p.TotalFee,
 		RefundFee:     p.RefundFee,
 		RefundDesc:    p.RefundDesc,
+		NotifyURL:     p.NotifyURL,
 	}
 	rawRet, err := util.PostXMLWithTLS(refundGateway, req, p.RootCa, refund.MchID)
 	if err != nil {