/// <reference types="node" />
export declare function hash(preimage: Buffer): Promise<Buffer>;
export declare function encrypt(pskEncryptionKey: Buffer, ...buffers: Buffer[]): Promise<Buffer>;
export declare function decrypt(pskEncryptionKey: Buffer, data: Buffer): Promise<Buffer>;
export declare function hmac(key: Buffer, message: Buffer): Promise<Buffer>;
export declare function randomBytes(size: number): Buffer;
export declare function generateSharedSecretFromToken(_seed: Buffer, _token: Buffer): Buffer;
export declare function generateReceiptHMAC(_secret: Buffer, _message: Buffer): Buffer;
export declare function encryptConnectionAddressToken(_seed: Buffer, _token: Buffer): Buffer;
export declare function decryptConnectionAddressToken(_seed: Buffer, _token: Buffer): Buffer;