import { MessageProcessor, ProcessingPayload } from '@hawk.so/core';
/**
 * Addon key used to attach Yandex Metrika counters ClientIDs.
 */
export declare const YANDEX_METRIKA_ADDON_KEY = "yandexMetrika";
/**
 * Reads up to ten Yandex Metrika counter IDs, requests their ClientIDs once
 * during initialization, and attaches available counters ClientIDs to subsequent events.
 *
 * Important: `window.ym.a[index][0]` relies on the Metrika initialization queue
 * and is not a public API contract. This is acceptable for the MVP, but the SDK
 * should accept counter IDs explicitly in the future.
 *
 * @see https://yandex.ru/support/metrica/ru/objects/get-client-id
 */
export declare class YandexMetrikaAddonMessageProcessor implements MessageProcessor<'errors/javascript'> {
    /**
     * Cached Yandex Metrika counters ClientIDs keyed by their one-based queue position.
     */
    private countersClientIds;
    /**
     * Reads up to ten initialized counters and requests their ClientIDs.
     */
    constructor();
    /**
     * Attaches cached Yandex Metrika counters ClientIDs when they are available.
     *
     * @param payload - event message payload to enrich
     * @returns {ProcessingPayload<'errors/javascript'>} enriched or original payload
     */
    apply(payload: ProcessingPayload<'errors/javascript'>): ProcessingPayload<'errors/javascript'>;
    /**
     * Returns Yandex Metrika global function when it is installed on the page.
     */
    private getYandexMetrika;
    /**
     * Reads initialized Yandex Metrika counters from the queue and requests ClientIDs.
     *
     * @param ym - Yandex Metrika global function.
     */
    private collectCountersClientIds;
    /**
     * Requests ClientID for one valid Yandex Metrika counter queue entry.
     *
     * @param ym - Yandex Metrika global function.
     * @param queueIndex - Zero-based Metrika initialization queue entry index.
     */
    private collectCounterClientId;
    /**
     * Returns valid counter ID from the Yandex Metrika initialization queue.
     *
     * @param ym - Yandex Metrika global function.
     * @param queueIndex - Zero-based Metrika initialization queue entry index.
     */
    private getCounterIdFromQueue;
    /**
     * Converts raw counter ID from the Metrika queue to a positive integer.
     *
     * @param rawCounterId - Counter ID read from the Metrika queue.
     */
    private parseCounterId;
    /**
     * Requests ClientID from Yandex Metrika and caches it when it is available.
     *
     * @param ym - Yandex Metrika global function.
     * @param queueIndex - Zero-based Metrika initialization queue entry index.
     * @param counterId - Yandex Metrika counter ID.
     */
    private requestClientId;
    /**
     * Saves Yandex Metrika counter ID and ClientID under one-based queue position.
     *
     * @param queueIndex - Zero-based Metrika initialization queue entry index.
     * @param counterId - Yandex Metrika counter ID.
     * @param clientId - ClientID returned by Yandex Metrika.
     */
    private saveCounterClientId;
}