f

app/main/api/internal/queue/paySuccessNotify.go

@@ -322,12 +322,13 @@ func (l *PaySuccessNotifyUserHandler) handleError(ctx context.Context, err error
 			logx.Infof("已发起微信退款申请, orderID: %d, amount: %f", order.Id, order.Amount)
 			return asynq.SkipRetry
 		} else {
-			// 支付宝退款为同步结果，仅 [2026-01-25 16:38:17, 2026-02-02 18:26) 区间内订单走 bak 商户号
+			// 支付宝退款为同步结果，优先按订单记录的 payment_merchant 选择商户；
+			// 老订单若未写入商户号，则在 AliRefund 内按时间区间兜底。
 			orderPayTime := &order.CreateTime
 			if order.PayTime.Valid {
 				orderPayTime = &order.PayTime.Time
 			}
-			refund, refundErr := l.svcCtx.AlipayService.AliRefund(ctx, order.OrderNo, order.Amount, orderPayTime, "")
+			refund, refundErr := l.svcCtx.AlipayService.AliRefund(ctx, order.PaymentMerchant, order.OrderNo, order.Amount, orderPayTime, "")
 			if refundErr != nil {
 				logx.Error(refundErr)
 				return asynq.SkipRetry