Zach Duda zachduda

Signed chat

This gist intends on clearing up some of the misinformation surrounding signed chat/the reporting feature Mojang has added to Minecraft 1.19.1. Here you can find both technical information as well as a general explanation of how these work.

Profile keys

After joining a server, clients now send a profile key used for verifying a message's authenticity. This key and thus the whole signing process is optional, but by default, servers enforce secure profiles for clients to send chat messages. Whenever the player sends a chat message and has a key associated, the message will be signed using their own private key, which the server then verifies using the public key sent after join. Assuming signature, timestamp, and message contents line up, the message goes through.

On the other end, clients can also require all broadcasted player messages to be signed, disregarding the ones without sender verified signatures.

Message signatures

Basic Snake HTML and JavaScript Game

Snake is a fun game to make as it doesn't require a lot of code (less than 100 lines with all comments removed). This is a basic implementation of the snake game, but it's missing a few things intentionally and they're left as further exploration for the reader.

Further Exploration

Score
When the snake eats an apple, the score should increase by one. Use context.fillText() to display the score to the screen

	// 1. Open the browser developper console on the network tab
	// 2. Start the video
	// 3. In the dev tab, locate the load of the "master.json" file, copy its full URL
	// 4. Run: node vimeo-downloader.js "<URL>"
	// (done automatically now) 5. Combine the m4v and m4a files with mkvmerge

	const fs = require('fs');
	const url = require('url');
	const https = require('https');
	const { exec } = require('child_process');

	// 1. Open the browser developper console on the network tab
	// 2. Start the video
	// 3. In the dev tab, locate the load of the "master.json" file, copy its full URL
	// 4. Run: node vimeo-downloader.js "<URL>"
	// 5. Combine the m4v and m4a files with mkvmerge

	const fs = require('fs');
	const url = require('url');
	const https = require('https');

	function postDataToWebhook(data){
	//get the values needed from the passed in json object
	var userName=data.name;
	var userPlatform=data.platform;
	var userEmail=data.email;
	//url to your webhook
	var webHookUrl="webhook_url";

	//https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest
	var oReq = new XMLHttpRequest();

	#!/usr/bin/env bash
	# Ubuntu Server or VM Cleaner. Safe by default; aggressive when asked.
	# Example safe: sudo ./clean.sh
	# Example aggressive: sudo JOURNAL_DAYS=3 AGGRESSIVE=1 ./clean.sh
	# Enable Docker image prune (images only): sudo ./clean.sh --docker-images
	# Tested on Ubuntu 20.04, 22.04, 24.04 (server/VM images).

	set -Eeuo pipefail
	trap 'rc=$?; echo "Error on line $LINENO: $BASH_COMMAND (exit $rc)"; exit $rc' ERR
	IFS=$'\n\t'