微信JSSDK对接，代下单支付

server/dukang-api/src/integrations/pay/pay.wechat.provider.ts

@@ -3,7 +3,7 @@ import { loadAppConfig } from '@dukang/shared-types';
 import { PrismaService } from '../../common/prisma/prisma.module';
 import { WECHAT_PROVIDER } from '../integrations.constants';
 import type { IWechatProvider } from '../wechat/wechat.interface';
-import type { IPayProvider, PayOrderResult } from './pay.interface';
+import type { IPayProvider, PayMethod, PayOrderResult } from './pay.interface';
 
 @Injectable()
 export class PayWechatProvider implements IPayProvider {
@@ -14,28 +14,60 @@ export class PayWechatProvider implements IPayProvider {
     @Inject(WECHAT_PROVIDER) private readonly wechat: IWechatProvider,
   ) {}
 
-  async payOrder(orderId: bigint, openId?: string, platform: 'h5' | 'mini' = 'h5'): Promise<PayOrderResult> {
+  async payOrder(
+    orderId: bigint,
+    openId?: string,
+    platform: 'h5' | 'mini' = 'h5',
+    payMethod: PayMethod = 'JSAPI',
+  ): Promise<PayOrderResult> {
     if (loadAppConfig().mockPay) {
+      if (payMethod === 'NATIVE') {
+        const order = await this.prisma.order.findUnique({ where: { id: orderId } });
+        const orderNo = order?.orderNo ?? orderId.toString();
+        return {
+          mode: 'native',
+          codeUrl: `mock://wechat-pay/native?orderNo=${encodeURIComponent(orderNo)}`,
+          externalNo: `MOCK-NATIVE-${Date.now()}`,
+        };
+      }
       return { mode: 'mock', externalNo: `MOCK-${Date.now()}` };
     }
     if (!this.wechat.isPayEnabled()) {
       throw new Error('微信支付未配置：请关闭 MOCK_PAY 并配置 WX_MCH_ID 等商户参数');
     }
-    if (!openId) {
-      throw new Error('微信支付需要用户 openId，请先完成微信授权登录');
-    }
 
     const order = await this.prisma.order.findUnique({ where: { id: orderId } });
     if (!order) throw new Error('订单不存在');
 
     const amountFen = Math.round(Number(order.payAmount) * 100);
+    const notifyUrl = process.env.WX_PAY_NOTIFY_URL ?? '';
+
+    if (payMethod === 'NATIVE') {
+      this.logger.log(`create NATIVE prepay order=${order.orderNo} mchid=${this.wechat.getMchId()}`);
+      const { codeUrl } = await this.wechat.createNativePrepay({
+        orderNo: order.orderNo,
+        description: `杜康好客订单 ${order.orderNo}`,
+        amountFen,
+        notifyUrl,
+      });
+      return {
+        mode: 'native',
+        codeUrl,
+        externalNo: `NATIVE-${order.orderNo}`,
+      };
+    }
+
+    if (!openId) {
+      throw new Error('微信支付需要用户 openId，请先完成微信授权登录');
+    }
+
     this.logger.log(`create JSAPI prepay order=${order.orderNo} mchid=${this.wechat.getMchId()} platform=${platform}`);
     const prepay = await this.wechat.createJsapiPrepay({
       orderNo: order.orderNo,
       description: `杜康好客订单 ${order.orderNo}`,
       amountFen,
       openId,
-      notifyUrl: process.env.WX_PAY_NOTIFY_URL ?? '',
+      notifyUrl,
       platform,
     });
     return { mode: 'jsapi', prepay };