uchks / tf-observer

An open-source discord bot that tracks whenever an update is released to Discord's TestFlight and sends an embed. Made purely out of spite.

tf-observer by uchks
A discord bot that tracks whenever an update is released to Discord's TestFlight and sends an embed.

_{Made for Enmity, a Discord client mod for iOS (and soon Android) devices.
You can view it in action in the "testflight-updates" channel, or here.}

Build & Deployment:

Prerequisites:

• Node.js (https://nodejs.org/)

Setup:

• Clone the Repository:
  git clone https://github.com/uchks/tf-observer.git

• Navigate to the Repository:
  cd tf-observer

• Install dependencies:
  npm install

• Create a .env file:
  In the root of the repository, create a file named .env and add the following:
  

BOT_TOKEN = // your bots token.
CHANNEL_ID = // channel id, must be a text or announcements channel.
GUILD_ID = // server id
CLIENT_ID = // discord developer portal, application's client id.
FETCH_URL = // this is where the CloudFlare worker comes into place, see How It Happened.
APP_NAME = Discord - Chat, Talk & Hangout // Discord's app name.
EMBED_COLOR = '' // the color for the embed
EMBED_THUMBNAIL_URL = 'https://is3-ssl.mzstatic.com/image/thumb/Purple116/v4/fa/bf/43/fabf4352-a22e-4f88-796a-5e4bae0c4688/AppIcon-0-0-1x_U007epad-0-0-0-85-220.png/1920x1080bb-80.png' // Discord's app icon.
DEV_MODE = false // true will reload commands on bot start every restart, false does not.
postgresconn = // i used postgres for the database, adjust to your liking

• Build & Run:
  npm run build npm run start

How It Happened:

Due to some unfavorable... things, I decided to look into Testflight's API. I did this by using my iPhone and my computer. Introducing: mitmproxy, a glorious utility that allows you to proxy requests from your phone. it was quite simple really.

• launch mitmproxy
• find your local ipv4 address
• change your phone wifi settings to the address with port 8080
• go to https://mitm.it
• install the root cert
• enable the root cert
• and open testflight

Something that stood out to me was the /v3/accounts/ request. I clicked on it. In front of me were request headers, alongside the full link. I took note of this, figuring it'd be of use later on.

To the right of it, the response from the link.

Below it, is the JSON response body. At the top of it being Life360, an app I have in my Testflight. From there, I opened the response body in notepad, and searched for Discord.

This is where I knew I found exactly what I wanted. So what did I do? Make things way more complicated than necessary, I created a Cloudflare Worker to make the request from the headers I got earlier for me, and filtered out the json data to only show me the Discord portion. and from there, the rest is history.

So here's the source code. I don't expect anyone to read a book, but in the case you were interested, here it is.