I'm trying to create a Discord bot using raw api, but after some time, the bot doesn't works anymore.
I think is because I don't maintain websocket connection, so, how I can mantain it?
My current code:

const ws = new WebSocket("wss://gateway.discord.gg/?v=6&encoding=json");

    let interval = 0;
    let payload = {
      op: 2,
      d: {
        token: botToken,
        intents: 32767,
        properties: {
          $os: "linux",
          $browser: "chrome",
          $device: "chrome",
        },
      },
    };

    ws.on("open", function open() {
      ws.send(JSON.stringify(payload));
    });

    ws.on("message", function incoming(data) {
      let response = JSON.parse(data);
      const { t, event, op, d } = response;

      switch (op) {
        case 10:
          const { heartbeat_interval } = d;
          interval = heartbeat(heartbeat_interval);
        break;
      }
    });

    const heartbeat = (ms) => {
      return setInterval(() => {
        ws.send(JSON.stringify({ op: 1, d: null }));
      }, ms);
    };