export type SyncedStateStatus = "connected" | "disconnected" | "reconnecting";
export type StatusChangeCallback = (status: SyncedStateStatus) => void;
export type SyncedStateClient = {
    getState(key: string): Promise<unknown>;
    setState(value: unknown, key: string): Promise<void>;
    subscribe(key: string, handler: (value: unknown) => void): Promise<void>;
    unsubscribe(key: string, handler: (value: unknown) => void): Promise<void>;
};
export type WebSocketFactory = (url: string) => WebSocket;
export type PendingRequest = {
    resolve: (value: unknown) => void;
    reject: (reason: unknown) => void;
};
export type Connection = {
    ws: WebSocket;
    nextId: number;
    pending: Map<string, PendingRequest>;
    isOpen: boolean;
    messageHandlers: Map<string, Set<(value: unknown) => void>>;
    pendingRequestTimer: ReturnType<typeof setTimeout> | null;
    webSocketFactory: WebSocketFactory;
};