android Paytm payment gateway with Firebase

[harax...@gmail.com]

I am using Firebase database and i want to integrate paytm payment system in my android application. if you want to know more about paytm then you may vist here (https://business.paytm.com/developers-api#eCom). and in this blog(https://www.simplifiedcoding.net/paytm-integration-android-example/) they have shown how to implement paytm integration with PHP with Xampp Server. i want to implement same thing with firebase. so How can i implement this? also how to add Paytm Checksum Kit file in my Firebase server? any suggestion would be appreciated.