function main(arg) {
    const server = http.createServer();
    const wss = new WebSocket.Server({ server });
    server.listen(4444);

    wss.on("connection", function connection(wss) {
      const ws = new WebSocket(
        "wss://server.example.com",
        {
          agent: arg ? new SocksProxyAgent("socks://" + arg) : false, // socket5 proxy
          headers: {
            "User-Agent":
              "Firefox/102.0",
          },
          origin: "https://example.com", // origin
        }
      );

      ws.on("message", function incoming(data) {
        wss.send(data.toString());
      });

      wss.on("message", function incoming(data) {
        ws.send(data.toString());
      });

    });
  }