/**
 * Converts a stun url to a turn url
 *
 * @param {string} stunUrl url of a stun server
 * @param {'tcp'|'udp'} protocol what protocol to use for the turn server
 * @returns {string} url of a turn server
 */
export declare function convertStunUrlToTurn(stunUrl: string, protocol: 'udp' | 'tcp'): string;
/**
 * Converts a stun url to a turns url
 *
 * @param {string} stunUrl url of a stun server
 * @returns {string} url of a turns server
 */
export declare function convertStunUrlToTurnTls(stunUrl: string): string;