Google pay button design in react native without libraries

I’m implementing Google pay to my react native app. I have to create the google pay button with the native assets provided by google, since i’m using the react native payments but they don’t have the already built in button, i’m confused to how can i use their assets to create the button. they mentioned in their site that we have to put drawable, layout and values in android/app/main/res folder. But i don’t understand what to do after that. and i’m getting an error when building. Can anyone please give me an example or an article where can i read about that. I searched but i didn’t find any article or tutorial about that.