import { SearchMessagesFilterInputUnion } from '../inputs';
import { CountUnion, ErrorUnion } from '../outputs';
/**
 * Returns approximate number of messages of the specified type in the chat
 * @param {Object} params
 * @param {number} [params.chatId] - Identifier of the chat in which to count messages
 * @param {SearchMessagesFilterInputUnion} [params.filter] - Filter for message content;
 * searchMessagesFilterEmpty is unsupported in this function
 * @param {boolean} [params.returnLocal] - If true, returns count that is available
 * locally without sending network requests, returning -1 if the number of messages
 * is unknown
 * @param {Object} state
 * @returns {CountUnion | ErrorUnion}
 */
export declare type GetChatMessageCountMethod = <ResponseT = CountUnion>(params: GetChatMessageCountParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface GetChatMessageCountParams {
    /** Identifier of the chat in which to count messages */
    chatId?: number;
    /** Filter for message content; searchMessagesFilterEmpty is unsupported in this function */
    filter?: SearchMessagesFilterInputUnion;
    /**
     * If true, returns count that is available locally without sending network requests,
     * returning -1 if the number of messages is unknown
     */
    returnLocal?: boolean;
}