init

server/dukang-api/src/integrations/pay/pay.interface.ts

@@ -0,0 +1,3 @@
+export interface IPayProvider {
+  payOrder(orderId: bigint): Promise<{ externalNo: string }>;
+}

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

@@ -0,0 +1,15 @@
+import { Injectable } from '@nestjs/common';
+import { loadAppConfig } from '@dukang/shared-types';
+import { IPayProvider } from './pay.interface';
+
+@Injectable()
+export class PayMockProvider implements IPayProvider {
+  private readonly config = loadAppConfig();
+
+  async payOrder(_orderId: bigint): Promise<{ externalNo: string }> {
+    if (!this.config.mockPay) {
+      throw new Error('Real WeChat pay not implemented in preV1');
+    }
+    return { externalNo: `MOCK-${Date.now()}` };
+  }
+}