微信退款，需要原订单总额

app/third/paymentService/payment_service.go

@@ -165,6 +165,7 @@ type OrderRefundRequest struct {
 	RefundOrderId int64  `json:"refund_order_id"` //	退款订单号
 	RefundReason  string `json:"refund_reason"`   //	退款原因
 	RefundAmount  int64  `json:"refund_amount"`   //	退款金额，单位分
+	TotalAmount   int64  `json:"total_amount"`    //	订单总额
 	PayChannel    int    `json:"pay_channel"`     //	支付渠道类型 1:wx,2:zfb
 	Wx            WxPay  `json:"wx"`
 	Ali           AliPay `json:"ali"`

app/third/paymentService/wechat_service.go

@@ -229,8 +229,8 @@ func WxOrderRefund(ctx context.Context, orderRefundRequest OrderRefundRequest) (
 		SetBodyMap("amount", func(bm gopay.BodyMap) {
 			// 退款金额:单位是分
 			bm.Set("refund", orderRefundRequest.RefundAmount). //实际退款金额
-				Set("total", orderRefundRequest.RefundAmount). // 折扣前总金额（不是实际退款数）
-				Set("currency", "CNY")
+										Set("total", orderRefundRequest.TotalAmount). // 折扣前总金额（不是实际退款数）
+										Set("currency", "CNY")
 		})
 	//    body：参数Body
 	refund, err := wxClient.V3Refund(ctx, bm)