/// <reference types="node" />
import { Deferred } from './promise';
import { EventEmitter } from 'events';
import { DataChannel } from '../data_channel';
/**
 * @module rtc.internal
 */
/**
 * Helper which handles DataChannel negotiation for RemotePeer
 * @class rtc.internal.ChannelCollection
 */
export declare class ChannelCollection extends EventEmitter {
    channels: Record<string, Promise<DataChannel>>;
    defers: Record<string, Deferred<DataChannel>>;
    pending: Record<string, DataChannel>;
    wait_d: Deferred<void>;
    wait_p: Promise<void>;
    local?: Record<string, RTCSessionDescriptionInit>;
    remote?: Record<string, RTCSessionDescriptionInit>;
    /**
     * A new data channel is available
     * @event data_channel_added
     * @param {String} name Name of the channel
     * @param {Promise -> rtc.Stream} stream Promise of the channel
     */
    constructor();
    /**
     * Set the local channel description.
     * @method setLocal
     * @param {Object} data Object describing each offered DataChannel
     */
    setLocal(data: Record<string, RTCSessionDescriptionInit>): void;
    /**
     * Set the remote channel description.
     * @method setRemote
     * @param {Object} data Object describing each offered DataChannel
     */
    setRemote(data: Record<string, RTCSessionDescriptionInit>): void;
    /**
     * Matches remote and local descriptions and creates promises common DataChannels
     * @method _update
     * @private
     */
    _update(): void;
    /**
     * Resolves promises waiting for the given DataChannel
     * @method resolve
     * @param {DataChannel} channel The new channel
     */
    resolve(channel: DataChannel): void;
    /**
     * Get a promise to a DataChannel. Will resolve if DataChannel was offered and gets initiated. Might reject after remote and local description are processed.
     * @method get
     * @param {String} name The label of the channel to get
     * @return {Promise -> DataChannel} Promise for the DataChannel
     */
    get(name: string): Promise<DataChannel>;
}