/**
 * **Google Linker Bridge Implementation**
 *
 * - Replicates the Google Linker Bridge functionality found in `analytics.js`.
 * - Address the gap where `gtag.js` does not expose this bridge function (as of the current version).
 * - Inspired and guided by the article:
 *   [Cross Domain Tracking on Google Analytics 4 (GA4)](https://www.thyngster.com/cross-domain-tracking-on-google-analytics-4-ga4/)
 *
 * @version 1.0.0
 * @last_updated 2023-11-03
 */
/**
 * The purpose of this function is to generate a '_gl' parameter value based on existing
 * Google Analytics cookies to aid in cross-domain tracking.
 *
 * @param a Any input string to be used for generating a browser fingerprint.
 * @returns A string representation of the '_gl' parameter value.
 */
export declare function generateLinkerParam(a: any): string;
/**
 * @summary Decrypts a `_gl` parameter and merges its values into the `google_tag_data.data` object.
 *
 * This function processes the encrypted `_gl` parameter typically generated by the Google Analytics linker
 * feature. After decryption, it will merge the result into the `google_tag_data.data` object, either
 * into the query or fragment based on the `useFragment` argument.
 *
 * @param glParam - The `_gl` parameter to be decrypted.
 * @param useFragment - Optional flag indicating if data should be merged into the fragment.
 *
 * @returns The updated googleTagData.data object.
 *
 * @throws {Error} When Google Tag Manager (GTM) is not available.
 */
export declare function decryptCookiesIds(glParam: string, useFragment?: boolean): {
  [key: string]: any;
};