/**
 * Compress input data using zstd.
 * Level 0: raw blocks only (no compression, fast).
 */
export type CompressOptions = {
    level?: number;
    checksum?: boolean;
    dictionary?: Uint8Array | {
        bytes: Uint8Array;
        id?: number;
    };
    noDictId?: boolean;
};
export declare function compress(input: Uint8Array, options?: CompressOptions): Uint8Array;