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Last active Jan 28, 2019
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Firebase Auth Using Facebook In Expo
// Say this is /utils/auth.js
import firebase from './firebase'
export async function signInWithFacebook() {
const appId = Expo.Constants.manifest.extra.facebook.appId;
const permissions = ['public_profile', 'email']; // Permissions required, consult Facebook docs
const {
} = await Expo.Facebook.logInWithReadPermissionsAsync(
switch (type) {
case 'success': {
await firebase.auth().setPersistence(firebase.auth.Auth.Persistence.LOCAL); // Set persistent auth state
const credential = firebase.auth.FacebookAuthProvider.credential(token);
const facebookProfileData = await firebase.auth().signInAndRetrieveDataWithCredential(credential); // Sign in with Facebook credential
// Do something with Facebook profile data
// OR you have subscribed to auth state change, authStateChange handler will process the profile data
return Promise.resolve({type: 'success'});
case 'cancel': {
return Promise.reject({type: 'cancel'});
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