import * as cookie from 'cookie';
import { Logger } from '../logger';
export declare const SECURE_CROSSSITE_OPTIONS: {
    sameSite: string;
    secure: boolean;
};
export declare function getCookieDomain(url: string, logger: Logger): string | null;
export declare const getCookieString: (name: string, val: string, options?: cookie.SerializeOptions | undefined) => string;
/**
 * Construct a cookie string to set the OptimizelyOptOut cookie in the opt out
 * response.
 * @param {String} cookieDomain
 * @param {Boolean} [secureCrossSiteCookies false]
 * @return {String} The opt out response will write to document.cookie.
 */
export declare function getOptOutCookieString(cookieDomain: string, secureCrossSiteCookies?: boolean): string;
/**
 * Construct a cookie string that instructs the browser to delete the
 * OptimizelyOptOut cookie (Max-Age=0). Used when the visitor opts back in
 * via `optimizely_opt_out=false` query parameter.
 * @param {String} cookieDomain
 * @return {String} The opt out delete cookie string for the response.
 */
export declare function getDeleteOptOutCookieString(cookieDomain: string): string;
export declare function getSessionCookieString(sessionId: string): string;
type CookieAction = 'new' | 'delete';
type CookieOperation = {
    action: CookieAction;
    name: string;
    value?: string;
};
export declare function newOrDeleteCookie(header: string): CookieOperation;
export declare function safeParseCookie(cookieStr: string, options?: {
    decode?: (value: string) => string;
}): Record<string, string | undefined>;
export {};