Flutter支付集成插件comet_payone的使用

comet_payone

Comet Payone 是为 Flutter 开发的插件，用于连接到 BCEL（老挝中央银行电子支付系统）。

该插件可以生成付款二维码，并跟踪交易状态。

安装

在 pubspec.yaml 文件中添加以下依赖：

dependencies:
  comet_payone: ^2.0.0

然后运行 flutter pub get 来安装该包。

使用

首先，导入所需的库：

import 'package:flutter_payone/flutter_payone.dart';
import 'package:flutter_payone/constants.dart';

初始化商店

你需要注册你的商店并获取 mcid 和 subscribeKey。这些信息由 BCEL 提供。

Future<String> initStore() async {
  String mcid = "mch6066c3a96b789";
  String applicationId = "ONEPAY";
  String bankName = "BCEL";
  Country country = Country.lao;
  Province province = Province.vientiane;
  String subscribeKey = "sub-c-91489692-fa26-11e9-be22-ea7c5aada356";
  String terminalid = "12345678";

  return await FlutterPayone.initStore(mcid, province, subscribeKey, terminalid, country, bankName, applicationId);
}

生成二维码

你可以生成一个包含金额和货币类型的二维码。你还可以添加描述，这将接受字符串值。

Future<String> buildQrcode() async {
  int amount = 1;
  Currency currency = Currency.laoKip;
  String description = "";
  return  await FlutterPayone.buildQrcode(amount, currency, description);
}

跟踪交易

现在你可以开始跟踪交易，预期的交易响应包括客户姓名、支付金额等。

Future<String> startObserve() async {
  return await FlutterPayone.startObserve();
}

示例代码

以下是一个完整的示例代码，展示了如何使用 comet_payone 插件：

import 'package:comet_payone/flutter_payone.dart';
import 'package:comet_payone/constants.dart';
import 'package:flutter/material.dart';
import 'package:qr_flutter/qr_flutter.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String _initStoreResponse = '';
  String _qrcodeValue = '';
  String _transactionValue = '';

  Future<void> initStore() async {
    String initStoreResponse;

    String mcid = "mch6066c3a96b789";
    String applicationId = "ONEPAY";
    String bankName = "BCEL";
    Country country = Country.lao;
    Province province = Province.vientiane;
    String subscribeKey = "sub-c-91489692-fa26-11e9-be22-ea7c5aada356";
    String terminalid = "12345678";
    try {
      initStoreResponse = await FlutterPayone.initStore(mcid, province, subscribeKey, terminalid, country, bankName, applicationId);
    } on Exception catch (_) {
      initStoreResponse = "error";
    }
    setState(() {
      _initStoreResponse = initStoreResponse;
    });
  }

  Future<void> buildQrcode() async {
    String qrcodeResponse;
    int amount = 1;
    Currency currency = Currency.laoKip;
    String description = "";
    try {
      qrcodeResponse = await FlutterPayone.buildQrcode(amount, currency, description);
    } on Exception catch (_) {
      qrcodeResponse = _.toString();
    }
    setState(() {
      _qrcodeValue = qrcodeResponse;
    });
  }

  Future<void> startObserve() async {
    String transactionValue;
    try {
      transactionValue = await FlutterPayone.startObserve();
    } on Exception catch (_) {
      transactionValue = "error";
    }
    setState(() {
      _transactionValue = transactionValue;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('You have pushed the button this many times:'),
            Text(
              '',
              style: Theme.of(context).textTheme.headline4,
            ),
            Column(
              children: [
                ElevatedButton(
                    onPressed: () {
                      initStore();
                    },
                    child: Text("初始化商店")),
                ElevatedButton(
                    onPressed: () {
                      buildQrcode();
                    },
                    child: Text("生成二维码")),
                ElevatedButton(
                    onPressed: () {
                      startObserve();
                    },
                    child: Text("开始观察")),
                Text(_initStoreResponse),
                QrImage(
                  data: _qrcodeValue,
                  version: QrVersions.auto,
                  size: 200.0,
                ),
                Text(_transactionValue)
              ],
            )
          ],
        ),
      ),
    );
  }
}