/// <reference types="node" />
import { TransportContext } from "../../context/transport";
import { DtlsContext } from "../../context/dtls";
import { CipherContext } from "../../context/cipher";
import { Handshake } from "../../typings/domain";
import { SrtpContext } from "../../context/srtp";
export declare class Flight4 {
    private udp;
    private dtls;
    private cipher;
    private srtp;
    constructor(udp: TransportContext, dtls: DtlsContext, cipher: CipherContext, srtp: SrtpContext);
    exec(certificateRequest?: boolean): void;
    createPacket(handshakes: Handshake[]): Buffer;
    sendServerHello(): Buffer;
    sendCertificate(): Buffer;
    sendServerKeyExchange(): Buffer;
    sendCertificateRequest(): Buffer;
    sendServerHelloDone(): Buffer;
}