declare function node_openConnection(wsUrl: string, protocol?: string | string[]): Promise<WebSocket>;
export declare const openConnection: typeof node_openConnection;
declare function node_onClosed(socket: WebSocket, listener: () => void): void;
export declare const onClosed: typeof node_onClosed;
declare function node_onMessage(socket: WebSocket, listener: ((msg: string | Buffer) => void)): void;
export declare const onMessage: typeof node_onMessage;
export {};