@firebase/app-check

Initialize App Check with reCAPTCHA

This code initializes Firebase App Check using a reCAPTCHA V3 provider. It helps in defending the Firebase backend by ensuring that interactions are coming from your app's legitimate instances.

import { initializeApp } from 'firebase/app';
import { initializeAppCheck, ReCaptchaV3Provider } from 'firebase/app-check';

const app = initializeApp({ /* your firebase config */ });
const appCheck = initializeAppCheck(app, {
  provider: new ReCaptchaV3Provider('your-recaptcha-site-key'),
  isTokenAutoRefreshEnabled: true
});

Initialize App Check with Custom Provider

This code snippet demonstrates how to initialize Firebase App Check using a custom token provider. This is useful when you have specific security measures or existing infrastructure that generates tokens for client apps.

import { initializeApp } from 'firebase/app';
import { initializeAppCheck, CustomProvider } from 'firebase/app-check';

const app = initializeApp({ /* your firebase config */ });
const appCheck = initializeAppCheck(app, {
  provider: new CustomProvider({
    getToken: () => {
      // logic to fetch a token from your server
      return fetch('/my-server/get-token').then(response => response.json());
    }
  }),
  isTokenAutoRefreshEnabled: true
});