I want to integrate phonePe payment gateway in our already existing android app built using kotlin. We have paytm integration. We want phonepe now

More details:

What is the purpose of integrating the PhonePe payment gateway in your existing Android app? To replace the existing Paytm integration
Should the PhonePe payment integration support specific transaction types? One-time payments,Recurring subscriptions
Do you have the necessary documentation and credentials for integrating the PhonePe payment gateway? Yes, we have all the documentation and credentials