/**
 * 压缩
 */
export declare function compressWithZStd(code: Buffer): Promise<Buffer>;
/**
 * 用 Brotli 压缩字符串或 Buffer，返回 Promise<Buffer>
 * @param {Buffer|string} code
 * @returns {Promise<Buffer>}
 */
export declare function compressWithBrotli(code: Buffer): Promise<Buffer>;