import { ITelegramClient } from '../../client.types.js';
import { InputPeerLike, FullUser } from '../../types/index.js';
/**
 * Get full information about a user.
 *
 * @param userId  ID of the user or their username
 */
export declare function getFullUser(client: ITelegramClient, userId: InputPeerLike): Promise<FullUser>;