import type { IEnvironment } from '../shared/types.js';
import { type IFirebaseOptions } from './types.js';
/**
 * Reads the Firebase options from the environment variables.
 * @param environment The current environment.
 * @param firebaseConfigProcessEnvKey The key of the environment variable containing the Firebase configuration.
 * @returns The Firebase options.
 * @throws
 * - INVALID_FIREBASE_CONFIG: if the provided env var key is invalid or not set.
 * - INVALID_ENVIRONMENT: if the provided environment is not recognized.
 * - FAILED_TO_READ_FIREBASE_CONFIG: if the Firebase configuration could not be read from the environment variable.
 */
export declare const readFirebaseOptions: (environment: IEnvironment | undefined, firebaseConfigProcessEnvKey: string | undefined) => IFirebaseOptions;