import { ITelegramClient } from '../../client.types.js';
/**
 * Changes the current default value of the Time-To-Live setting,
 * applied to all new chats.
 *
 * @param period  New TTL period, in seconds (or 0 to disable)
 */
export declare function setGlobalTtl(client: ITelegramClient, period: number): Promise<void>;