对接微信支付

server/dukang-api/src/callbacks/callbacks.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { IntegrationsModule } from '../integrations/integrations.module';
+import { TradeModule } from '../modules/trade/trade.module';
+import { WechatPayCallbackController } from './wechat-pay.controller';
+
+@Module({
+  imports: [IntegrationsModule, TradeModule],
+  controllers: [WechatPayCallbackController],
+})
+export class CallbacksModule {}

server/dukang-api/src/callbacks/wechat-pay.controller.ts

@@ -0,0 +1,38 @@
+import { Controller, Headers, Inject, Post, Req, Res } from '@nestjs/common';
+import type { Request, Response } from 'express';
+import { TradeService } from '../modules/trade/trade.service';
+import { WECHAT_PROVIDER } from '../integrations/integrations.constants';
+import type { IWechatProvider } from '../integrations/wechat/wechat.interface';
+
+type RawBodyRequest = Request & { body: Buffer };
+
+@Controller('callbacks/wechat')
+export class WechatPayCallbackController {
+  constructor(
+    private readonly tradeService: TradeService,
+    @Inject(WECHAT_PROVIDER) private readonly wechat: IWechatProvider,
+  ) {}
+
+  @Post('pay')
+  async payNotify(
+    @Req() req: RawBodyRequest,
+    @Headers() headers: Record<string, string | string[] | undefined>,
+    @Res() res: Response,
+  ) {
+    try {
+      const rawBody =
+        (req as Request & { rawBody?: Buffer }).rawBody?.toString('utf8') ??
+        (typeof req.body === 'string' ? req.body : JSON.stringify(req.body ?? {}));
+      const notify = await this.wechat.parsePayNotification(headers, rawBody);
+      await this.tradeService.handlePaySuccess({
+        orderNo: notify.outTradeNo,
+        transactionId: notify.transactionId,
+        amountFen: notify.amountFen,
+      });
+      return res.status(200).json({ code: 'SUCCESS', message: '成功' });
+    } catch (err) {
+      const message = err instanceof Error ? err.message : '处理失败';
+      return res.status(500).json({ code: 'FAIL', message });
+    }
+  }
+}