Deno bot

👋 Intro

This is just a proof of concept, of a Discord bot, which can execute any .ts code, submitted by users via discord messages. Bot itself is written for the node enviroment, but the enviroment, where user-submitted code is running, is Deno.

📕 Backstory

The idea of this bot isn't new at all. There are bots which are doing essentially the same thing, but this one is built different (I hope so). I wanted to make a bot like this for a long time, but I couldn't figure out one thing - how to make it secure. Security for this kind of a program is crucial, since it is running user-submitted code on a server. Node enviroment isn't well suited for this task, since you have access to the network and filesystem out of the box, whatsoever.

A little while ago, I watched this video on YouTube about Deno, and there where multiple cool things, right out of the box, which surprised me:

• Native TypeScript support out of the box
• The whole enviroment is packed into a single binary
• Security out of the box, meaning that you can't use file system or network, without explicitly telling deno to do so.

First point is kinda nice-to-have, but the last two points are quite important for me. Having the whole enviroment in one single binary would make this project a bit more compact, and the security out of the box is just simply perfect.

👀 Examples

To run any message as a script, just type in

deno ```ts
const sum = (a: number, b: number): number => {
  return a + b
}

console.log(sum(5, 4))
```

By default, only two "paralell" executions are allowed, but this number can be change with deno set limit <max limit> command. Also, code which takes more than 5 seconds to run will be killed automatically. Feel free to test it yourself. 🤠

One thing to mention, your code is evaluated as JS by default, but you can use TypeScript if you want, just by writing ts at the beginning of your code.

deno ```ts
console.log("hehe, loop goes brr")
while(true) {}
```

Screenshot of the actual output

🚩 Important info

You need to have the Node enviroment installed on your machine. In order to run this on your discord server, you will need to register a new discord application and a bot at https://discord.com/developers. To run the actual code you have to install dependencies using npm install command, and then just use command npm run dev or npm run start.

🤖 TODO

• Comments
• Dockerfile
• Refactoring maybe ?

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Feel free to open any issue :)