Google Pay Rewrite in Flutter

Google Pay is a digital wallet platform and online payment system developed by Google. Recently, Google Pay has been rewritten in Flutter, a framework for building high-performance, high-fidelity, apps for iOS and Android, from a single codebase. This rewrite has brought many benefits to the Google Pay platform.

Benefits of rewriting in Flutter

The rewrite of Google Pay in Flutter has brought several benefits such as:

Increased performance

Flutter provides a high-performance rendering engine that uses advanced GPU-accelerated compositing techniques. This enables Google Pay to run smoothly and with minimal lag on a wide range of devices.

Improved app stability

Flutter apps are less prone to crashes and other stability issues. This is because Flutter's reactive programming model ensures that the app's UI always stays in sync with its underlying data model.

Easier to maintain and update

Because Flutter allows for an app to be written with a single codebase, updates to Google Pay can be implemented more quickly, with fewer errors, and with less effort.

Technology used in rewriting Google Pay

Flutter: Flutter is a mobile development framework created by Google that allows developers to build high-performance, high-fidelity, apps for iOS and Android, all from a single codebase.

Dart: Dart is a client-optimized programming language that is used to write Flutter apps. It has a syntax that is familiar to developers from other programming languages such as Java and C++.

Firebase: Firebase is a cloud-based platform developed by Google that provides a variety of backend services including authentication, real-time database, and cloud messaging.

Code snippets

Here is an example of how to create a Flutter widget that displays a Google Pay button:

class GooglePayButton extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: () {},
      color: Colors.white,
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          Image(
            image: AssetImage("assets/google_pay.png"),
            height: 40.0,
          ),
          Padding(
            padding: EdgeInsets.only(left: 10.0),
            child: Text(
              "Google Pay",
              style: TextStyle(fontSize: 20.0),
            ),
          ),
        ],
      ),
    );
  }
}

Here is an example of how to use the Google Pay API to make a payment:

final paymentData = await GooglePay.checkout(
  price: 100,
  currencyCode: "USD",
  description: "Test Payment",
  merchantId: "01234567890123456789",
  environment: Environment.test,
);

final paymentResult = await makePayment(paymentData);

if(paymentResult == PaymentResult.success) {
  // Payment was successful
} 
else if(paymentResult == PaymentResult.failure) {
  // Payment failed
}

Conclusion

The rewrite of Google Pay in Flutter has brought numerous benefits. These include better performance, improved stability, and easier maintenance. Flutter's reactive programming model made it possible to synchronize the UI and underlying data model, while Dart provided a syntax that was familiar to developers already versed in programming languages such as Java and C++. The use of the Google Pay API helped to facilitate payments, simplifying the entire process.