flutter_paydemo/lib/service/pay_service.dart

// import 'package:fluwx/fluwx.dart' as fluwx;
// import 'package:flutter_alipay/flutter_alipay.dart';
// import 'package:stripe_payment/stripe_payment.dart';

class PayService {
  PayService._();

  /// 发起微信支付
  Future<WechatPaymentCreatedResponse> createWechatPayment({
    required String productId,
    String? source,
  }) async {
    return sendPostRequest(
      '/v1/payment/wechatpay/',
      (resp) {
        return WechatPaymentCreatedResponse.fromJson(resp.data);
      },
      formData: {
        'product_id': productId,
        'source': source,
      },
    );
  }

  void wechatPay() async {
    bool isInstalled = await fluwx.isWeChatAppInstalled();
    if (isInstalled) {
      fluwx
          .pay(fluwx.PayInfo(
        appId: 'your_app_id',
        partnerId: 'your_partner_id',
        prepayId: 'your_prepay_id',
        packageValue: 'Sign=WXPay',
        nonceStr: 'your_nonce_str',
        timeStamp: 'your_timestamp',
        sign: 'your_sign',
      ))
          .then((response) {
        // 处理支付结果
      });
    } else {
      // alert('未安装微信');
    }
  }

  void alipay() async {
    String orderString = 'your_order_string'; // 从服务器获取
    var result = await FlutterAlipay.pay(orderString);
  }

  void stripe() async {
    var token = await StripePayment.paymentRequestWithCardForm(
        CardFormPaymentRequest());
    // 发送 token 到服务器进行支付处理
  }
}