/**
 *
 * 2key-ratchet
 * Copyright (c) 2016 Peculiar Ventures, Inc
 * Based on https://whispersystems.org/docs/specifications/doubleratchet/ and
 * https://whispersystems.org/docs/specifications/x3dh/ by Open Whisper Systems
 *
 */
import { ECPublicKey } from "../crypto";
import { BaseProtocol } from "./base";
import { MessageProtocol } from "./message";
export declare class MessageSignedProtocol extends BaseProtocol {
    receiverKey: ECPublicKey;
    senderKey: ECPublicKey;
    message: MessageProtocol;
    protected signature: ArrayBuffer;
    sign(hmacKey: CryptoKey): Promise<void>;
    verify(hmacKey: CryptoKey): Promise<boolean>;
    protected getSignedRaw(): Promise<ArrayBuffer | SharedArrayBuffer>;
    protected signHMAC(macKey: CryptoKey): Promise<ArrayBuffer>;
}