退款接口可指定金额

src/modules/dj/service/payRefund.ts

@@ -13,6 +13,7 @@ import { MchChannelService } from './mchChannel';
 import { RefundService } from './refund';
 import { PayService } from './pay';
 import { OrderService } from './order';
+import { isNumber } from '@midwayjs/core/dist/util/types';
 
 @Provide()
 export class PayRefundService extends BaseService {
@@ -90,7 +91,11 @@ export class PayRefundService extends BaseService {
       if (!order || +order.status !== 1) {
         throw new Error('订单不存在或订单状态非支付成功');
       }
-      return await this.refundService.toRefund(order, order.amount, payload.reason || '');
+      let amount = order.amount;
+      if(isNumber(payload.amount) && +payload.amount < +order.amount) {
+        amount = payload.amount;
+      }
+      return await this.refundService.toRefund(order, amount, payload.reason || '');
     } catch (err) {
       this.logger.error('退款下单', JSON.stringify(payload), err.message);
       throw new CoolCommException(err.message);