feat: add refund

backend/providers/wepay/pay.go

@@ -78,10 +78,22 @@ type PrepayData struct {
 }
 
 // PaySignOfJSAPI
-func (pay *PrepayData) PaySignOfJSAPI() (*wechat.JSAPIPayParams, error) {
+func (pay *PrepayData) PaySignOfJSAPI() (*, error) {
 	return pay.client.payClient.PaySignOfJSAPI(pay.AppID, pay.PrepayID)
 }
 
+func (c *Client) Refund(ctx context.Context, f func(*BodyMap)) (*wechat.RefundOrderResponse,error ){
+	bm := NewBodyMap(c.config)
+	f(bm)
+
+	resp, err := c.payClient.V3Refund(ctx, bm.bm)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp.Response, nil
+}
+
 func (c *Client) V3TransactionJsapi(ctx context.Context, f func(*BodyMap)) (*PrepayData, error) {
 	bm := NewBodyMap(c.config)
 	f(bm)
@@ -149,11 +161,12 @@ func NewBodyMap(c *w.Config) *BodyMap {
 	bm := make(gopay.BodyMap)
 	bm.Set("appid", c.AppID).
 		Set("mchid", c.Pay.MchID).
-		Set("notify_url", c.Pay.NotifyURL).
-		SetBodyMap("amount", func(bm gopay.BodyMap) {
-			bm.Set("total", 1).
-				Set("currency", "CNY")
-		})
+		Set("notify_url", c.Pay.NotifyURL)
+		// .
+		// SetBodyMap("amount", func(bm gopay.BodyMap) {
+		// 	bm.Set("total", 1).
+		// 		Set("currency", "CNY")
+		// })
 	return &BodyMap{
 		bm: bm,
 	}
@@ -184,6 +197,44 @@ func (b *BodyMap) OutTradeNo(outTradeNo string) *BodyMap {
 	return b.Set("out_trade_no", outTradeNo)
 }
 
+// TransactionID
+func (b *BodyMap) TransactionID(transactionID string) *BodyMap {
+	return b.Set("transaction_id", transactionID)
+}
+
+// OutRefundNo
+func (b *BodyMap) OutRefundNo(outRefundNo string) *BodyMap {
+	return b.Set("out_refund_no", outRefundNo)
+}
+
+// RefundReason
+func (b *BodyMap) RefundReason(refundReason string) *BodyMap {
+	return b.Set("reason", refundReason)
+}
+
+// RefundAmount
+func (b *BodyMap) RefundAmount(total, refund int64, currency CURRENCY) *BodyMap {
+	return b.SetBodyMap("amount", func(bm gopay.BodyMap) {
+		bm.
+			Set("total", total).
+			Set("refund", refund).
+			Set("currency", currency.String())
+	})
+}
+
+func (b *BodyMap) CNYRefundAmount(total, refund int64) *BodyMap {
+	return b.RefundAmount(total, refund, CNY)
+}
+
+// RefundGoodsInfo
+func (b *BodyMap) RefundGoodsInfo(name string) *BodyMap {
+	return b.Set("goods_detail", []map[string]any{
+		{
+			"goods_name": name,
+		},
+	})
+}
+
 // Amount
 func (b *BodyMap) Amount(total int64, currency CURRENCY) *BodyMap {
 	return b.SetBodyMap("amount", func(bm gopay.BodyMap) {