export declare function timeSafeCompare(a: string | Uint8Array<ArrayBuffer>, b: string | Uint8Array<ArrayBuffer>): Promise<boolean>;
export default timeSafeCompare;
/**
 * Serialize data into a cookie header.
 *
 * Serialize the a name value pair into a cookie string suitable for
 * http headers. An optional options object specified cookie parameters.
 *
 * serialize('foo', 'bar', { httpOnly: true })
 *   => "foo=bar; httpOnly"
 *
 * @param {string} name
 * @param {string} val
 * @param {object} [opts]
 * @return {string}
 */
export declare function serializeCookie(name: string, val: string, opts?: Partial<{
    encode: (string: any) => string;
    maxAge: any;
    domain: any;
    path: any;
    expires: any;
    httpOnly: boolean;
    secure: any;
    partitioned: any;
    priority: any;
    sameSite: any;
}>): string;
export type CookieEnv = Partial<{
    COOKIE_HTTPONLY: string;
    COOKIE_SECURE: string;
    COOKIE_SAMESITE: string;
    COOKIE_MAX_AGE_SPAN: string;
    COOKIE_DOMAIN: string;
    COOKIE_PATH: string;
}>;
/**
 * Builds an option object to be used by the cookie serializer.
 * All options have defaults which can be edited using environment variables.
 *
 * Environment variables available:
 * - `env.COOKIE_HTTPONLY`:
 *   Specifies if the cookie should have the `HttpOnly` attribute.
 *   Set to "0" to remove this attribute from the cookie definition.
 * - `env.COOKIE_SECURE`:
 *   Specifies if the cookie should have the `Secure` attribute.
 *   Set to "0" to remove this attribute from the cookie definition.
 * - `env.COOKIE_SAMESITE`:
 *   Will specify the value for the `SameSite` attribute for the cookie.
 *   Can be "Strict", "None" or "Lax" (default).
 * - `env.COOKIE_MAX_AGE_SPAN`:
 *   Specifies, in second, how long the cookie should be valid for.
 *   Defaults to 7 days.
 * - `env.COOKIE_DOMAIN`:
 *   If set, will specify a value for the `Domain` attribute for the cookie.
 * - `env.COOKIE_PATH`:
 *   If set, will specify a value for the `Path` attribute for the cookie.
 *   Defaults to `/`.
 *
 * @returns {object} - Options object for `cookie.serialize`
 * @private
 */
export declare function getCookieOptions(env?: CookieEnv): Partial<{
    httpOnly: any;
    secure: any;
    sameSite: any;
    maxAge: any;
    path: any;
    domain: any;
}>;
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