import { Context } from 'grammy';
import { ChatTypesEnum } from '../types';
declare type MaybeArray<T> = T | Array<T>;
declare type MaybePromise<T> = T | Promise<T>;
export interface ComposerMetadataChatType {
    method: 'chatType';
    arg: MaybeArray<ChatTypesEnum>;
}
export interface ComposerMetadataPredicate {
    method: 'filter' | 'drop';
    arg: (ctx: Context) => MaybePromise<boolean>;
}
export declare type ComposerMetadata = ComposerMetadataChatType | ComposerMetadataPredicate;
export {};