type-test.ts

import firebase from '@react-native-firebase/app';
import * as auth from '@react-native-firebase/auth';

console.log(auth.default().currentUser);

// checks module exists at root
console.log(firebase.auth().app.name);
console.log(firebase.auth().currentUser);

// checks module exists at app level
console.log(firebase.app().auth().app.name);
console.log(firebase.app().auth().currentUser);

// checks statics exist
console.log(firebase.auth.SDK_VERSION);

// checks statics exist on defaultExport
console.log(auth.firebase.SDK_VERSION);

// checks root exists
console.log(firebase.SDK_VERSION);

// checks firebase named export exists on module
console.log(auth.firebase.SDK_VERSION);

// checks multi-app support exists
console.log(firebase.auth(firebase.app()).app.name);

// checks default export supports app arg
console.log(firebase.auth(firebase.app('foo')).app.name);

// Statics
console.log(firebase.auth.EmailAuthProvider.PROVIDER_ID);
console.log(firebase.auth.PhoneAuthProvider.PROVIDER_ID);
console.log(firebase.auth.GoogleAuthProvider.PROVIDER_ID);
console.log(firebase.auth.GithubAuthProvider.PROVIDER_ID);
console.log(firebase.auth.TwitterAuthProvider.PROVIDER_ID);
console.log(firebase.auth.FacebookAuthProvider.PROVIDER_ID);
console.log(firebase.auth.OAuthProvider.PROVIDER_ID);
console.log(firebase.auth.PhoneAuthState.CODE_SENT);

firebase.auth().onAuthStateChanged(user => {
  if (user) {
    console.log(user.email);
    console.log(user.displayName);
  }
});

const u = firebase.auth().currentUser;
console.log(u ? u.displayName : '');
console.log(u ? u.email : '');
console.log(u ? u.toJSON() : '');

firebase
  .auth()
  .signInAnonymously()
  .then();

firebase
  .auth()
  .signInWithEmailAndPassword('', '')
  .then();