firebaseConfig.js

import { initializeApp } from "firebase/app";
import { getDatabase } from "firebase/database";
import { getAnalytics } from "firebase/analytics";
import { getFirestore } from "firebase/firestore";

import {
  REACT_APP_API_KEY,
  REACT_APP_AUTH_DOMAIN,
  REACT_APP_DATABASE_URL,
  REACT_APP_PROJECT_ID,
  REACT_APP_STORAGE_BUCKET,
  REACT_APP_MESSAGING_SENDER_ID,
  REACT_APP_APP_ID,
  REACT_APP_MEASUREMENT_ID,
} from "@env";

// Optionally import the services that you want to use
// import {...} from "firebase/auth";
// import {...} from "firebase/firestore";
// import {...} from "firebase/functions";
// import {...} from "firebase/storage";

// Initialize Firebase
const firebaseConfig = {
  apiKey: REACT_APP_API_KEY,
  authDomain: REACT_APP_AUTH_DOMAIN,
  databaseURL: REACT_APP_DATABASE_URL,
  projectId: REACT_APP_PROJECT_ID,
  storageBucket: REACT_APP_STORAGE_BUCKET,
  messagingSenderId: REACT_APP_MESSAGING_SENDER_ID,
  appId: REACT_APP_APP_ID,
  measurementId: REACT_APP_MEASUREMENT_ID,
};

const app = initializeApp(firebaseConfig);
const analytics = getAnalytics(app);
export const database = getDatabase(app);
export const firestore = getFirestore(app);

// export { database };