/// <reference types="node" />
import type { KeyPair } from "../../typings/key-types";
export declare const extractNonce: (buffer: Buffer) => Readonly<{
    nonce: Buffer;
    encrypted: Buffer;
}>;
export declare const keyPairEncrypt: (buffer: Buffer, pair: KeyPair) => Buffer;
export declare const keyPairDecrypt: (cipher: Buffer, pair: KeyPair) => Buffer;