vanish/index.js

import config from './config.json' assert {type: "json"};
import { MatrixClient, SimpleFsStorageProvider, AutojoinRoomsMixin } from "matrix-bot-sdk";

const storage = new SimpleFsStorageProvider("storage.json");
const client = new MatrixClient(config.homeserver, config.token, storage);

AutojoinRoomsMixin.setupOnClient(client);
client.start().then(() => console.log(`Vanishing messages...`));

let timeInMS = config.time * 3_600_000 //? converts hours to milliseconds 

client.on("room.message", (roomId, event) => {
    if (event["sender"] === config.user) {
        if (event["content"]["body"].startsWith(config.key)) return; //? if message starts with the key do NOT delete that message
        console.table([roomId, event["content"]["body"]])
        function redactMessage(){client.redactEvent(roomId, event["event_id"], "Vanish")} //? define callback function 
        setTimeout(redactMessage, timeInMS)
    }
})