import { Cypher } from '../Cypher';
import { IKeyPairBytes } from '../../types';
export declare class ED25519 extends Cypher {
    private sign;
    private encrypt?;
    constructor(sign: IKeyPairBytes, encrypt?: IKeyPairBytes | undefined);
    private static sealNonce;
    private static seal;
    private static sealOpen;
    encryptMessage(input: Uint8Array): Uint8Array;
    decryptMessage(input: Uint8Array): Uint8Array;
    createSignature(input: Uint8Array): Uint8Array;
    verifySignature(input: Uint8Array, signature: Uint8Array): boolean;
}