/**
 * Public types. The Algorithm enum is internal — users see string names
 * via CompressError.algorithm. Each subpath knows its own algorithm,
 * so users never need to pass one.
 */
/** @internal */
export declare const enum Algorithm {
    Zstd = 0,
    Brotli = 1,
    Zlib = 2,
    Bz2 = 3,
    Lz4 = 4,
    Xz = 5,
    Lzma = 6,
    Snappy = 7,
    Gzip = 8
}
/** @internal */
export declare const enum Status {
    Ok = 0,
    InvalidArg = 1,
    InvalidLevel = 2,
    BufTooSmall = 3,
    SizeUnknown = 4,
    UnsupportedAlgo = 5,
    Compression = 6,
    Decompression = 7,
    Truncated = 8,
    SizeLimit = 9,
    StreamFinished = 10,
    StreamState = 11,
    Oom = 12,
    Internal = 13
}
/** Canonical lower-case algorithm names. */
export type AlgorithmName = "zstd" | "brotli" | "zlib" | "bz2" | "lz4" | "xz" | "snappy" | "gzip";
/** Thrown for any non-Ok status. Carries the raw status code and algo name. */
export declare class CompressError extends Error {
    /** Underlying C status code. Stable across versions; see compress_utils.h. */
    readonly code: number;
    readonly algorithm: AlgorithmName;
    constructor(code: number, algorithm: AlgorithmName, message: string);
}
export interface CompressOptions {
    /** 1..10. 1 = fastest, 10 = smallest. Default 5. */
    level?: number;
}
export interface DecompressOptions {
    /**
     * Decompressed size in bytes if known by the caller. Skips the
     * size-hint probe and any internal streaming fallback — a small
     * win for hot paths where the size is tracked out-of-band.
     */
    expectedSize?: number;
}
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