import { NextFunction, Request, Response } from "express";
import { FinallyFunc } from "finally-provider";
import { LogProv } from "@jawis/jab";
import { NodeWS, SocketData, WebsocketRequestHandler, WsMessageListener } from "./internal";
export type MakeUpgradeHandlerDeps = {
    onError: (error: unknown) => void;
    logProv: LogProv;
    finally: FinallyFunc;
};
/**
 * Wrap the WebSocket object in NodeWs, to get:
 *
 * - Typed send funtion.
 * - Strict management of ws state.
 */
export declare const makeUpgradeHandler: <MS extends SocketData, MR extends SocketData>(deps: MakeUpgradeHandlerDeps, onMessage: WsMessageListener<MS, MR>, onOpen?: (_nws: NodeWS<MS, MR>) => void, onClose?: () => void) => WebsocketRequestHandler;
/**
 * hacky
 *  - when and where to call end()
 *  - can't send error object in end() in node 14.
 */
export declare const expressErrorsThrow: (err: any, req: Request, res: Response, _next: NextFunction) => void;