import { ErrorUnion, OkUnion } from '../outputs';
/**
 * Informs TDLib that the chat is opened by the user. Many useful activities depend
 * on the chat being opened or closed (e.g., in supergroups and channels all updates
 * are received only for opened chats)
 * @param {Object} params
 * @param {number} [params.chatId] - Chat identifier
 * @param {Object} state
 * @returns {OkUnion | ErrorUnion}
 */
export declare type OpenChatMethod = <ResponseT = OkUnion>(params: OpenChatParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface OpenChatParams {
    /** Chat identifier */
    chatId?: number;
}