import type { JwtPayload } from './jsonwebtoken-type';
/**
 * @internal
 */
export declare function getIssuerSubdomain(decodedJwt: JwtPayload | undefined, isIasToken?: boolean): string | undefined;
/**
 * @internal
 * Replaces the first part of the hostname (subdomain) in a URL.
 * @param baseUrl - The URL whose subdomain should be replaced.
 * @param newSubdomain - The new subdomain to use or a falsy value to remove the subdomain.
 * @returns The URL with replaced subdomain, with trailing slash removed if present.
 */
export declare function replaceSubdomain(baseUrl: string, newSubdomain: string | undefined): string;