/**
 * @file RTCPeerConnection.ts
 * @description WebRTC peer connection driving a real ICE/DTLS/SCTP/DCEP stack.
 * @module peerconnection/RTCPeerConnection
 *
 * This orchestrates signaling (offer/answer + ICE candidate trickle) on top of
 * src/transport-stack.ts, which implements the actual on-the-wire protocols.
 * It interoperates with browser RTCPeerConnection for data channels.
 */
import { EventEmitter } from 'events';
import RTCCertificate from '../dtls/RTCCertificate';
import { RTCSessionDescription, RTCSessionDescriptionInit } from '../sdp/RTCSessionDescription';
import { RTCDataChannel, RTCDataChannelInit } from '../datachannel/RTCDataChannel';
import { TransportStack } from '../transport-stack';
/** Configuration accepted by {@link RTCPeerConnection}. */
export interface RTCConfiguration {
    iceServers?: unknown[];
    iceTransportPolicy?: 'all' | 'relay';
    certificates?: RTCCertificate[];
}
export declare const RTCSignalingState: Readonly<{
    STABLE: "stable";
    HAVE_LOCAL_OFFER: "have-local-offer";
    HAVE_REMOTE_OFFER: "have-remote-offer";
    HAVE_LOCAL_PRANSWER: "have-local-pranswer";
    HAVE_REMOTE_PRANSWER: "have-remote-pranswer";
    CLOSED: "closed";
}>;
export declare const RTCIceGatheringState: Readonly<{
    NEW: "new";
    GATHERING: "gathering";
    COMPLETE: "complete";
}>;
export declare const RTCPeerConnectionState: Readonly<{
    NEW: "new";
    CONNECTING: "connecting";
    CONNECTED: "connected";
    DISCONNECTED: "disconnected";
    FAILED: "failed";
    CLOSED: "closed";
}>;
export declare class RTCPeerConnection extends EventEmitter {
    #private;
    constructor(configuration?: RTCConfiguration);
    createDataChannel(label: string, options?: RTCDataChannelInit): RTCDataChannel;
    createOffer(): Promise<RTCSessionDescription>;
    createAnswer(): Promise<RTCSessionDescription>;
    setLocalDescription(description?: RTCSessionDescriptionInit | RTCSessionDescription): Promise<void>;
    setRemoteDescription(description: RTCSessionDescriptionInit): Promise<void>;
    addIceCandidate(candidate: RTCIceCandidateInit | string): Promise<void>;
    getConfiguration(): RTCConfiguration;
    setConfiguration(configuration: RTCConfiguration): void;
    close(): void;
    get signalingState(): string;
    get iceGatheringState(): string;
    get iceConnectionState(): string;
    get connectionState(): string;
    get localDescription(): RTCSessionDescription | null;
    get remoteDescription(): RTCSessionDescription | null;
    get currentLocalDescription(): RTCSessionDescription | null;
    get currentRemoteDescription(): RTCSessionDescription | null;
    get pendingLocalDescription(): RTCSessionDescription | null;
    get pendingRemoteDescription(): RTCSessionDescription | null;
    get canTrickleIceCandidates(): boolean;
    get sctp(): TransportStack['sctp'];
}
/** ICE candidate init shape (subset of the W3C dictionary). */
interface RTCIceCandidateInit {
    candidate: string;
    sdpMid?: string;
    sdpMLineIndex?: number;
    usernameFragment?: string;
}
export {};