declare namespace ws {
  type RequestState = 'doing' | 'done' | 'failed';
  type Reply = {
    channel: 'return';
    method: 'HistorySnapshot';
    err: string | null;
    data: any;
  };

  type Request = {
    id: string;
    method: string;
    channel: string | null;
    data?: Record<string, any>;
    state: RequestState;
    start: number;
    end: number;
  };

  type WebSocketOption = {
    channel: string;
    canSubscribe: boolean | string | undefined;
    onMessage?: (obj: any) => void;
    data?: any;
  };

  type WebSocket = {
    data: WebSocketOption;
  };
}