Posted by Stephen McDonald, Developer Relations Engineer, Google Pay
Connect Multiple Payment Gateways with Google Pay and Firebase
We recently launched a series of open source samples demonstrating the server-side integration between Google Pay and a variety of Payment Service Providers (PSPs). These samples also show how to create a unified interface for integrating multiple PSPs, making integrations as easy as possible by reducing the time investment in integrating multiple APIs and client libraries.
A recent study by 451 Research showed that for merchants with over 50% of sales occurring online, 69% of them used multiple PSPs. We first demonstrated with the aforementioned samples how you can implement a consistent interface to multiple PSPs, streamlining your codebase while also providing more flexibility for the future. We've now taken this one step further and brought this unified PSP interface to the Firebase platform, by way of a Firebase Extension for Google Pay, making it easier than ever to integrate Google Pay with one or more PSPs.
Google Pay Firebase Extension
Firebase Extensions are open source pre-packaged bundles of code that developers can easily pull into their apps, and are designed to increase productivity, and provide extended functionality to your apps without the need to research, write, or debug code on your own. Following this line, the Google Pay Firebase Extension brings the unified PSP interface to developers' Firebase apps.
With the Google Pay Firebase Extension installed, you can pass a payment token from the Google Pay API to your Cloud Firestore database. The extension will listen for a request written to the path defined during installation, and then send the request to the PSP's API. It will then write the response back to the same Firestore node.
Like all Firebase Extensions, the Google Pay Firebase Extension is entirely open source, so you can modify the code yourself to change the functionality as you see fit, or even contribute your changes back via pull requests - the sky's the limit.
Furthermore, as the extension is backed by the aforementioned PSP samples project, the same set of PSPs are supported. Want to see your favorite PSP supported? Head on over to the PSP samples project which contains instructions for adding it.
Summing it up
Whether you're new to Google Pay or Firebase, or an existing user of either, the new Google Pay extension is designed to save you even more time and effort when integrating Google Pay and any number of Payment Service Providers with your application.
Get started with the extension today in the Firebase console.
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Do you have any questions? Let us know in the comments below or tweet using #AskGooglePayDevs.