import { ErrorUnion, OkUnion } from '../outputs';
/**
 * Informs TDLib that the message content has been opened (e.g., the user has opened
 * a photo, video, document, location or venue, or has listened to an audio file or
 * voice note message). An updateMessageContentOpened update will be generated if something
 * has changed
 * @param {Object} params
 * @param {number} [params.chatId] - Chat identifier of the message
 * @param {number} [params.messageId] - Identifier of the message with the opened
 * content
 * @param {Object} state
 * @returns {OkUnion | ErrorUnion}
 */
export declare type OpenMessageContentMethod = <ResponseT = OkUnion>(params: OpenMessageContentParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface OpenMessageContentParams {
    /** Chat identifier of the message */
    chatId?: number;
    /** Identifier of the message with the opened content */
    messageId?: number;
}