export type Runtime = 'node' | 'edge';
/**
 * ⚠️ EXPERIMENTAL
 *
 * Generates direct download links for a song.
 *
 * This API behaves differently depending on runtime:
 * - `node`: uses local DES-ECB decryption via Node crypto
 * - `edge`: uses Saavn's undocumented internal API
 *
 * Runtime must be specified explicitly.
 *
 * @param encryptedUrl - Encrypted media URL
 * @param options - { runtime: 'node' | 'edge', acknowledge: boolean } to acknowledge experimental nature
 * @returns Stream URL
 */
export declare function fetchStreamUrls(encryptedUrl: string, runtime: Runtime, acknowledge: boolean): Promise<Array<{
    bitrate: string;
    url: string;
}>>;