react-native Google refresh token handler using react-native-google-signin npm package

GoogleOAuth.js

import { GoogleSignin } from 'react-native-google-signin';

export default class GoogleOAuth {
  refreshGoogleToken = () => {
    return this._refreshGoogleTokenImpl();
  }

  _refreshGoogleTokenImpl = () => {
    return new Promise(async (res, rej) => {
      const isSignedIn = await GoogleSignin.isSignedIn();
      if (isSignedIn) {
        console.debug('refreshing the google access token');
        GoogleSignin.signInSilently()
          .then(async (authResponse) => {
            const { idToken, accessTokenExpirationDate } = authResponse;
            res({
              token: idToken,
              expires_at: accessTokenExpirationDate
            });
          }).catch(error => {
            console.debug('Failed to sign in with Google', error);
            rej('Failed to sign in with Google');
        });
      } else {
        console.debug('User is not signed in with Google');
        rej('Failed to refresh google token');
      }
    });
  }
}

HOW TO USE

In App.js
import Amplify, { Auth } from 'aws-amplify';
import GoogleOAuthClass from '<path to file>/GoogleOAuth.js';
import aws_config from './src/aws-exports';

const GoogleOAuth = new GoogleOAuthClass();

Amplify.configure(aws_config);

Auth.configure({
refreshHandlers: {
'google': GoogleOAuth.refreshGoogleToken
}
});