In the first part of this series, we explored the fundamentals of the Payment Request API and how it simplifies the payment experience. Now, let's delve deeper into advanced features and best practices to further optimize the integration of this powerful API.We start by making a modification of supportedMethods by adding the data property contains additional data related to the Google Pay payment method.Then we set the environment for the Google Pay integration to "TEST": The "TEST" environment is used in our case, for testing purposes to simulate transactions without making real payments.apiVersion: 2 and apiVersionMinor: 0 specify the version…