import type { ConsentState } from "../types.ts";
/**
 * Build `gcs` in the shape expected by the Google tag / GA4 collect wire format:
 * `G1` + encode(ad_storage_state) + encode(analytics_storage_state)
 */
export declare function buildGcs({ consent }: {
    consent: ConsentState;
}): string;
/**
 * Build `gcd` based on Consent Mode v2 state transitions.
 *
 * Uses the letter meanings described in Simo Ahava’s Consent Mode v2 guide:
 * - `l`: not set
 * - `p`: denied by default (no update)
 * - `q`: denied by default and after update
 * - `t`: granted by default (no update)
 * - `r`: denied by default, granted after update
 * - `m`: denied after update (no default)
 * - `n`: granted after update (no default)
 * - `u`: granted by default, denied after update
 * - `v`: granted by default and after update
 *
 * Reference: https://www.simoahava.com/analytics/consent-mode-v2-google-tags/
 *
 * Note: The official `gcd` encoding contains more metadata than just the
 * consent transitions. For our purposes we encode the transition letters for
 * the 4 main consent signals and preserve the observed framing:
 * - prefix: `13`
 * - suffix: `l1`
 *
 * This ensures the known baselines match:
 * - all denied (default denied, no update): `13p3p3p2p5l1`
 * - all granted (default denied, update granted): `13r3r3r2r5l1`
 */
export declare function buildGcd({ consentDefault, consentUpdate, }: {
    consentDefault: ConsentState;
    consentUpdate: ConsentState;
}): string;