/// <reference types="node" />
import { ZlibOptions } from 'zlib';
/**
 * zipBuffer uses `deflate`.
 * It's 9 bytes shorter than gzip.
 */
export declare function zipBuffer(buf: Buffer, options?: ZlibOptions): Promise<Buffer>;
/**
 * gzipBuffer uses `gzip`
 * It's 9 bytes longer than deflate.
 */
export declare function gzipBuffer(buf: Buffer, options?: ZlibOptions): Promise<Buffer>;
export declare function unzipBuffer(buf: Buffer, options?: ZlibOptions): Promise<Buffer>;
export declare function gunzipBuffer(buf: Buffer, options?: ZlibOptions): Promise<Buffer>;
export declare function zipString(s: string, options?: ZlibOptions): Promise<Buffer>;
export declare function gzipString(s: string, options?: ZlibOptions): Promise<Buffer>;
export declare function unzipToString(buf: Buffer, options?: ZlibOptions): Promise<string>;
export declare function gunzipToString(buf: Buffer, options?: ZlibOptions): Promise<string>;