import { TelegramClient } from '@mtcute/core/client.js';
import { UpdateContext } from './base.js';
import { PreCheckoutQuery } from '@mtcute/core';
/**
 * Context of a pre-checkout query update
 *
 * This is a subclass of {@link PreCheckoutQuery}, so all its fields are also available.
 */
export declare class PreCheckoutQueryContext extends PreCheckoutQuery implements UpdateContext<PreCheckoutQuery> {
    readonly client: TelegramClient;
    readonly _name: "pre_checkout_query";
    constructor(client: TelegramClient, query: PreCheckoutQuery);
    /** Approve the query */
    approve(): Promise<void>;
    /** Decline the query, optionally with an error */
    decline(error?: string): Promise<void>;
}