react.native.api.jsx

import * as firebase from 'firebase';

const config = {
  apiKey: 'api_secret',
  authDomain: 'your-project.firebaseapp.com',
  databaseURL: 'https://your-project.firebaseio.com',
  projectId: 'your-project',
  storageBucket: 'your-project.appspot.com',
  messagingSenderId: '***'
};

const firebaseApp = firebase.initializeApp(config);
// https://github.com/facebook/react-native/issues/12981
console.ignoredYellowBox = ['Setting a timer'];

const api = {
  firebase: firebaseApp,
  getUser: () => firebaseApp.auth().currentUser,
  getActiveItems: () => {
    //...
  }
};

export default api;