/// <reference types="node" />
import WebSocket from 'isomorphic-ws';
export declare enum WsConnectionStateEnum {
    INITIAL = 0,
    CONNECTING = 1,
    CONNECTED = 2,
    CLOSING = 3,
    RECONNECTING = 4
}
export interface WsStoredState<TWSTopicSubscribeEvent extends string | object> {
    /** The currently active websocket connection */
    ws?: WebSocket;
    /** The current lifecycle state of the connection (enum) */
    connectionState?: WsConnectionStateEnum;
    /** A timer that will send an upstream heartbeat (ping) when it expires */
    activePingTimer?: ReturnType<typeof setTimeout> | undefined;
    /** A timer tracking that an upstream heartbeat was sent, expecting a reply before it expires */
    activePongTimer?: ReturnType<typeof setTimeout> | undefined;
    /** If a reconnection is in progress, this will have the timer for the delayed reconnect */
    activeReconnectTimer?: ReturnType<typeof setTimeout> | undefined;
    /**
     * All the topics we are expected to be subscribed to on this connection (and we automatically resubscribe to if the connection drops)
     *
     * A "Set" and a deep-object-match are used to ensure we only subscribe to a topic once (tracking a list of unique topics we're expected to be connected to)
     */
    subscribedTopics: Set<TWSTopicSubscribeEvent>;
    /** Whether this connection has completed authentication (only applies to private connections) */
    isAuthenticated?: boolean;
}