import * as anchor from "@project-serum/anchor";
export declare function getNonce(): Uint8Array;
export declare function encrypt(message: string, nonce: Uint8Array, publicKey_receiver: anchor.web3.PublicKey, privateKey_sender: Uint8Array): string;
export declare function decrypt(encrypted: string, nonce: string, publicKey_sender: anchor.web3.PublicKey, privateKey_receiver: Uint8Array): string;