/**
 * @license
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { ActionCodeSettings, Auth, User } from '../../model/public_types';
/**
 * Gets the list of possible sign in methods for the given email address. This method returns an
 * empty list when
 * {@link https://cloud.google.com/identity-platform/docs/admin/email-enumeration-protection | Email Enumeration Protection}
 * is enabled, irrespective of the number of authentication methods available for the given email.
 *
 * @remarks
 * This is useful to differentiate methods of sign-in for the same provider, eg.
 * {@link EmailAuthProvider} which has 2 methods of sign-in,
 * {@link SignInMethod}.EMAIL_PASSWORD and
 * {@link SignInMethod}.EMAIL_LINK.
 *
 * @param auth - The {@link Auth} instance.
 * @param email - The user's email address.
 *
 * Deprecated. Migrating off of this method is recommended as a security best-practice.
 * Learn more in the Identity Platform documentation for
 * {@link https://cloud.google.com/identity-platform/docs/admin/email-enumeration-protection | Email Enumeration Protection}.
 * @public
 */
export declare function fetchSignInMethodsForEmail(auth: Auth, email: string): Promise<string[]>;
/**
 * Sends a verification email to a user.
 *
 * @remarks
 * The verification process is completed by calling {@link applyActionCode}.
 *
 * @example
 * ```javascript
 * const actionCodeSettings = {
 *   url: 'https://www.example.com/?email=user@example.com',
 *   iOS: {
 *      bundleId: 'com.example.ios'
 *   },
 *   android: {
 *     packageName: 'com.example.android',
 *     installApp: true,
 *     minimumVersion: '12'
 *   },
 *   handleCodeInApp: true
 * };
 * await sendEmailVerification(user, actionCodeSettings);
 * // Obtain code from the user.
 * await applyActionCode(auth, code);
 * ```
 *
 * @param user - The user.
 * @param actionCodeSettings - The {@link ActionCodeSettings}.
 *
 * @public
 */
export declare function sendEmailVerification(user: User, actionCodeSettings?: ActionCodeSettings | null): Promise<void>;
/**
 * Sends a verification email to a new email address.
 *
 * @remarks
 * The user's email will be updated to the new one after being verified.
 *
 * If you have a custom email action handler, you can complete the verification process by calling
 * {@link applyActionCode}.
 *
 * @example
 * ```javascript
 * const actionCodeSettings = {
 *   url: 'https://www.example.com/?email=user@example.com',
 *   iOS: {
 *      bundleId: 'com.example.ios'
 *   },
 *   android: {
 *     packageName: 'com.example.android',
 *     installApp: true,
 *     minimumVersion: '12'
 *   },
 *   handleCodeInApp: true
 * };
 * await verifyBeforeUpdateEmail(user, 'newemail@example.com', actionCodeSettings);
 * // Obtain code from the user.
 * await applyActionCode(auth, code);
 * ```
 *
 * @param user - The user.
 * @param newEmail - The new email address to be verified before update.
 * @param actionCodeSettings - The {@link ActionCodeSettings}.
 *
 * @public
 */
export declare function verifyBeforeUpdateEmail(user: User, newEmail: string, actionCodeSettings?: ActionCodeSettings | null): Promise<void>;