masterpass 1.0.1 masterpass: ^1.0.1 copied to clipboard
A Flutter plugin for working with the masterpass in-app API.
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:masterpass/masterpass.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: HomePage(),
);
}
}
class HomePage extends StatelessWidget {
///The form key to use for the amount form.
final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
/// The controller for the amount to pay.
final TextEditingController _amountController = TextEditingController();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Masterpass Example App'),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Center(
child: Form(
key: _formKey,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
_amountField(),
_payButton(context),
],
),
),
),
),
);
}
/// Returns the pay button.
Widget _payButton(context) {
return RaisedButton(
child: Text("PAY"),
onPressed: () async {
if (_formKey.currentState.validate()) {
//show loading dialog
showDialog(
context: context,
barrierDismissible: false,
builder: (context) => SimpleDialog(
title: Center(child: CircularProgressIndicator()),
backgroundColor: Colors.transparent,
),
);
String txnCode =
await _getTransactionId(double.parse(_amountController.text));
// Your masterpass API key.
String apiKey = "enter-your-api-key-here";
// The masterpass system you want to use (TEST or LIVE)
String system = MasterpassSystem.TEST;
Masterpass masterpass = Masterpass(apiKey, system);
CheckoutResult paymentResult = await masterpass.checkout(txnCode);
if (paymentResult is PaymentSucceeded) {
bool paymentVerified =
await _verifyTransaction(txnCode, paymentResult.reference);
Navigator.of(context).pop(); //pop the loading dialog
if (paymentVerified) {
Scaffold.of(context).showSnackBar(SnackBar(
content: Text("Payment succeeded."),
));
} else {
Scaffold.of(context).showSnackBar(SnackBar(
content: Text("Could not verify payment."),
));
}
} else {
Navigator.of(context).pop(); //pop the loading dialog
Scaffold.of(context).showSnackBar(SnackBar(
content: Text("Payment failed."),
));
}
}
},
);
}
/// Returns the amount field
TextFormField _amountField() {
return TextFormField(
controller: _amountController,
decoration: InputDecoration(
labelText: "Amount",
),
validator: (text) {
try {
double.parse(text);
} catch (e) {
return "Please enter a valid amount";
}
return null;
},
);
}
/// Make a call to your backend to get a code for the transaction.
Future<String> _getTransactionId(double amount) async {
//You should replace this code with the call to your backend which requests a new transaction from masterpass.
return Future.value("sample-transaction-code-from-your-backend");
}
/// Make a call to your backend to verify the payment
Future<bool> _verifyTransaction(String txnCode, String paymentRef) async {
//You should replace this code with the call to your backend which verifies that the transaction was successful.
return Future.value(true);
}
}