微信JSSDK对接，代下单支付

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

@@ -553,6 +553,55 @@ export class WechatApiProvider implements IWechatProvider {
     };
   }
 
+  async createNativePrepay(params: {
+    orderNo: string;
+    description: string;
+    amountFen: number;
+    notifyUrl: string;
+  }) {
+    if (!this.isPayEnabled()) {
+      throw new InternalServerErrorException(
+        '微信支付未配置：请关闭 MOCK_PAY 并配置 WX_MCH_ID、WX_MCH_SERIAL_NO、WX_MCH_PRIVATE_KEY、WX_API_V3_KEY',
+      );
+    }
+    const notifyUrl = params.notifyUrl || this.notifyUrl;
+    if (!notifyUrl) {
+      throw new InternalServerErrorException('请配置 WX_PAY_NOTIFY_URL');
+    }
+    const payAppId = this.appId || this.miniAppId;
+    if (!payAppId) {
+      throw new InternalServerErrorException('微信支付未配置：请设置 WX_APP_ID');
+    }
+    const body = {
+      appid: payAppId,
+      mchid: this.mchId,
+      description: params.description,
+      out_trade_no: params.orderNo,
+      notify_url: notifyUrl,
+      amount: { total: params.amountFen, currency: 'CNY' },
+    };
+    const path = '/v3/pay/transactions/native';
+    const payload = JSON.stringify(body);
+    const auth = this.signPayRequest('POST', path, payload);
+    const res = await this.fetchPayJson<{ code_url?: string }>(
+      `https://api.mch.weixin.qq.com${path}`,
+      {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          Accept: 'application/json',
+          Authorization: auth,
+        },
+        body: payload,
+      },
+    );
+    if (!res.code_url) {
+      throw new InternalServerErrorException('微信 Native 下单失败');
+    }
+    this.logger.log(`NATIVE prepay ok mchid=${this.mchId} orderNo=${params.orderNo}`);
+    return { codeUrl: res.code_url };
+  }
+
   async parsePayNotification(
     headers: Record<string, string | string[] | undefined>,
     rawBody: string,

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

@@ -51,6 +51,10 @@ export class WechatDisabledProvider implements IWechatProvider {
     return this.disabled();
   }
 
+  createNativePrepay() {
+    return this.disabled();
+  }
+
   parsePayNotification() {
     return this.disabled();
   }

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

@@ -132,6 +132,14 @@ export interface IWechatProvider {
     platform?: 'h5' | 'mini';
   }): Promise<WechatJsapiPrepayParams>;
 
+  /** 创建 Native 扫码支付 code_url */
+  createNativePrepay(params: {
+    orderNo: string;
+    description: string;
+    amountFen: number;
+    notifyUrl: string;
+  }): Promise<{ codeUrl: string }>;
+
   /** 解析并验签支付回调通知 */
   parsePayNotification(
     headers: Record<string, string | string[] | undefined>,

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

@@ -80,6 +80,10 @@ export class WechatMockProvider implements IWechatProvider {
     throw new NotImplementedException('FEATURE_DISABLED');
   }
 
+  createNativePrepay(): never {
+    throw new NotImplementedException('FEATURE_DISABLED');
+  }
+
   parsePayNotification(): never {
     throw new NotImplementedException('FEATURE_DISABLED');
   }

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

@@ -80,6 +80,15 @@ export class WechatRouterProvider implements IWechatProvider {
     return this.resolve().createJsapiPrepay(params);
   }
 
+  createNativePrepay(params: {
+    orderNo: string;
+    description: string;
+    amountFen: number;
+    notifyUrl: string;
+  }) {
+    return this.resolve().createNativePrepay(params);
+  }
+
   parsePayNotification(
     headers: Record<string, string | string[] | undefined>,
     rawBody: string,