import type { CallOptions, Client } from '@connectrpc/connect';
import { SignalingService } from '../gen/proto/rpc/webrtc/v1/signaling_connect';
import { ClientChannel } from './client-channel';
import type { DialWebRTCOptions } from './dial';
export declare class SignalingExchange {
    private readonly signalingClient;
    private readonly callOpts;
    private readonly pc;
    private readonly dc;
    private readonly dialOpts?;
    private readonly clientChannel;
    private callUuid?;
    private sentDoneOrErrorOnce;
    private exchangeDone;
    private iceComplete;
    private haveInitResponse;
    private awaitingRemoteDescription?;
    private remoteDescriptionSet?;
    private numCallUpdates;
    private maxCallUpdateDuration;
    private totalCallUpdateDuration;
    constructor(signalingClient: Client<typeof SignalingService>, callOpts: CallOptions, pc: RTCPeerConnection, dc: RTCDataChannel, dialOpts?: DialWebRTCOptions | undefined);
    doExchange(): Promise<ClientChannel>;
    private setup;
    terminate(err: Error): void;
    private processCallResponses;
    private handleInitError;
    private handleInitResponse;
    private handleUpdateResponse;
    private onLocalICECandidate;
    private sendError;
    private sendDone;
}