import ISubscribeConnectionObserver from './ISubscribeConnectionObserver';
import { InitFlags } from '../../signal/init/models';
import { ISignal } from '../../signal/ISignal';
import { PreferAudioLayerParams, PreferLayerResponse, PreferVideoLayerParams } from '../channel-messages';
import HMSConnection from '../HMSConnection';
export default class HMSSubscribeConnection extends HMSConnection {
    private isFlagEnabled;
    private readonly TAG;
    private readonly remoteStreams;
    private readonly observer;
    private readonly MAX_RETRIES;
    readonly nativeConnection: RTCPeerConnection;
    private pendingMessageQueue;
    private apiChannel?;
    private eventEmitter;
    private initNativeConnectionCallbacks;
    constructor(signal: ISignal, config: RTCConfiguration, isFlagEnabled: (flag: InitFlags) => boolean, observer: ISubscribeConnectionObserver);
    sendOverApiDataChannel(message: string): void;
    sendOverApiDataChannelWithResponse<T extends PreferAudioLayerParams | PreferVideoLayerParams>(message: T, requestId?: string): Promise<PreferLayerResponse>;
    close(): Promise<void>;
    private handlePendingApiMessages;
    private sendMessage;
    private waitForResponse;
}