/**
 * Upper bound on decompressed/buffered response bodies, shared by zlib's
 * `maxOutputLength` here and by the raw response-chunk buffering in
 * global-monitor.ts / RequestMonitoringService.ts. Caps decompression-bomb
 * amplification and unbounded in-memory buffering to a single sane number.
 */
declare const MAX_DECOMPRESSED_BYTES: number;
/**
 * Decompresses a response buffer according to its Content-Encoding.
 * Handles gzip, x-gzip, deflate (RFC 1950 with raw RFC 1951 fallback), and br.
 * Unknown or absent encodings are returned as-is (UTF-8 string).
 * Falls back to the raw UTF-8 string when zlib is unavailable (Edge runtime).
 *
 * @param onWarn  Optional callback for decompression failure warnings.
 */
declare function decompressBuffer(buffer: Buffer, encoding: string | undefined, onWarn?: (msg: string) => void): Promise<string>;

export { MAX_DECOMPRESSED_BYTES, decompressBuffer };