add log

@@ -146,6 +146,7 @@ class BuyerOrderCancelHandler {
         }
         // 更新订单状态成功
         if (updateBuyerOrderStatus()) {
+            log.info("cancel order {} from {} to {} success", orderCode, expectStatus, targetStatus);
             refundCoupon();
             transfer();
             refundPayGoodsMoney(buyerOrder);