declare function nowSeconds(nowMs: unknown): number;
export declare function applyCookiePrefix(cookiePrefix: unknown, cookieName: unknown): string;
export declare function buildD8aClientCookieName(cookiePrefix?: unknown): string;
export declare function buildD8aCookieName(propertyId: unknown, cookiePrefix?: unknown): string;
export declare function parseD8aClientCookie(value: unknown): {
    cid: string;
} | null;
/**
 * Generates the core cid parts (random + timestamp).
 * Shared by both cookie-based and anonymous cid flows.
 */
export declare function generateCidParts({ nowMs }?: {
    nowMs?: unknown;
}): {
    random: number;
    timestampSec: number;
};
/**
 * Formats cid parts into the canonical cid string.
 */
export declare function formatCid({ random, timestampSec }: {
    random: unknown;
    timestampSec: unknown;
}): string;
export declare function buildD8aClientCookieValue({ nowMs }?: {
    nowMs?: unknown;
}): string;
export declare function buildD8aClientCookieValueFromCid(cid: unknown): string | null;
export type SessionToken = {
    key: string;
    val: string;
    raw?: string;
    known: boolean;
};
declare function tokenizeSessionCookie(raw: unknown): SessionToken[] | null;
declare function detokenizeSessionCookie(tokens: SessionToken[]): string;
declare function getToken(tokens: SessionToken[], key: string): string | null;
declare function setToken(tokens: SessionToken[], key: string, val: unknown): void;
export declare function parseD8aSessionCookie(value: unknown): {
    tokens: SessionToken[];
    sid: number | null;
    sct: number | null;
    lastEventTs: number | null;
    seg: number | null;
} | null;
/**
 * Updates an existing session cookie tokens array or creates a new one.
 *
 * This is intentionally minimal in the current implementation:
 * - inactivity timeout creates a new session (new `s`, increment `o`)
 * - every event updates `t` and increments `j`
 * - preserves unknown tokens and token order where possible
 */
export declare function updateD8aSessionCookieTokens(existingTokens: SessionToken[] | null, { nowMs, sessionTimeoutMs }?: {
    nowMs?: unknown;
    sessionTimeoutMs?: unknown;
}): {
    tokens: SessionToken[];
    isNewSession: boolean;
};
export declare function serializeD8aSessionCookieTokens(tokens: SessionToken[]): string;
export declare const __internal: {
    SESSION_PREFIX: string;
    tokenizeSessionCookie: typeof tokenizeSessionCookie;
    detokenizeSessionCookie: typeof detokenizeSessionCookie;
    getToken: typeof getToken;
    setToken: typeof setToken;
    nowSeconds: typeof nowSeconds;
    applyCookiePrefix: typeof applyCookiePrefix;
};
export {};