Powering Flutter with Razorpay integration

Integrating a payment gateway like razorpay into a Flutter application can seem like a daunting task, but with the right tools and knowledge it is actually quite straightforward. In this blog, we will walk through the steps necessary to integrate razorpay into a Flutter application, from setting up the plugin to handling payment success, error, and external wallet events.

Initiation

To create a key for Razorpay payments, follow these steps:

1. Go to the Razorpay website (https://razorpay.com/) and sign up for an account.
2. Once you have signed up and logged in, click on the “Settings” tab in the left-hand menu.
3. Under the “API Keys” section, click the “Generate Key” button.
4. A modal window will appear where you can enter the name and purpose of the key. Enter a descriptive name and purpose, and then click the “Generate” button.
5. The key will be generated and displayed in the modal window. Make sure to copy the key and store it securely, as it will not be shown again.
6. That’s it! You now have a key that you can use to authenticate your Razorpay integration. Keep in mind that you can generate multiple keys for different purposes, such as for testing and production environments.

Integration

Flutter is a popular cross-platform mobile development framework that allows developers to build beautiful and performant apps for Android and iOS. Integrating a payment gateway like razorpay into a Flutter application can add an important layer of functionality and make it easier for users to make purchases within the app.

Next, we will focus on the Flutter side of the integration process, including adding the Razorpay Flutter plugin as a dependency, initializing the plugin, and setting up event listeners. We will also cover how to open the payment window and pass in options such as the amount to be paid, the description, and prefill information for the customer.

Integrating razorpay into a Flutter application is a straightforward process that can greatly enhance the user experience and enable your app to handle financial transactions. By the end of this blog, you will have a solid understanding of how to integrate razorpay into a Flutter application and be well on your way to building a fully-featured app.

1. First, add the Razorpay Flutter plugin as a dependency in your pubspec.yaml file:

2. Import the plugin in your Flutter code:

3. Initialize the Razorpay instance with your Razorpay API key:

4. Create a function to open the payment window with the desired options:

5. Create event handlers for the payment success, error, and external wallet events:

6. Finally, call the openCheckout() function when you want to open the payment window, for example, when the user clicks a button:

In the above example, the steps for integrating Razorpay into a Flutter application are outlined, including adding the plugin as a dependency, initializing the razorpay instance, setting up event listeners, and creating a function to open the payment window.

However, there are a few important aspects that are not covered in the example:

Middleware: You will not connect the front-end with Razorpay panel directly, for any transactions, you will connect it with your backend and database, so that for every user/transaction, you can save data/status of the payments/subscription etc. It would require some sort of bridge in between these two, it is always a good practice to create a middleware between the two systems.

Security: It is important to consider security when integrating a payment gateway like razorpay. Make sure to follow best practices to keep your users’ financial information safe, such as using SSL/TLS to encrypt communication and storing sensitive data in a secure manner.

Testing: It is essential to test your integration thoroughly before deploying it to production. Razorpay provides a sandbox environment that you can use for testing purposes.

Error handling: Consider implementing error handling in your integration, including displaying user-friendly error messages and retrying failed payments if necessary.

Advanced features: You may want to consider implementing additional features, such as recurring payments or subscriptions, using the razorpay API.

Documentation: Consider adding documentation and usage examples to your integration to make it easier for users to understand how to use it and get started.