Lewin Kelly Heliodex

TL;DR

Guide from https://glitchwitch.io/blog/2018-09/windows-10-on-digitalocean/
Download Windows ISO from https://www.microsoft.com/en-us/software-download/windows10ISO

Steps

Create a build droplet with 4GB RAM
Install QEMU and run the Windows 10 installation ISO

$ apt-get update && apt-get install qemu -y
$ qemu-img create -f raw windows10.img 16G

Although Microsoft no longer supports Windows XP updates, I'm sure many users still use it due to personal habits or job demands. Therefore, XP's product keys may still be necessary. Here lies the most comprehensive list of Windows XP product keys.

The following CD keys are official and original from Microsoft, primarily used for Windows XP Professional Service Pack 2/3 VOL/VLK system images, which are among the easiest to find on the Internet.

Windows XP Professional 32-bit Edition

INSTALL

Click the portal to navigate to it.

Blind Merged Mining with covenants ( sighash_anyprevout / op_ctv )

Update: the content of this gist is also explained in this Spacechains video.

This write-up was also published on bitcoin-dev.

Blind Merged Mining (BMM) is the idea of committing the hash of another blockchain into a unique location on the Bitcoin blockchain, and paying a Bitcoin fee to miners for the privilege of deciding this hash and capturing the fees inside the other blockchain. Since miners don’t have to know what the hash represents and are simply incentivized to choose the highest bidder, it requires no extra validation on their part (“blind”). This idea was originally conceived of by Paul Sztorc, but required a specific soft fork. [0]

In essence, BMM is a mechanism that allows external blockchains (altcoins, tokens) to outsource their mining to the Bitcoin blockchain. Instead of burning electricity with ASICs, th

How to configure Git and setup GitHub on new machine

By Qin Yu, last updated in March 2026. I hope this helped both human and AI.

First-Time Git Setup
- Three config files of different levels
- Use terminal to set identity and editor
Connect to GitHub with SSH
How to really commit in the past with Git for GitHub
How to reflect the actual authorship

Introduction

I'm Ruben "Bitcoin Sorcerer" Somsen. I do protocol design in order to enhance Bitcoin - SwiftSync, Silent Payments, Spacechains, Statechains, and more.

I'm co-founder/director of the 2140 Foundation together with Josie. We're a stable and independent European hub for Bitcoin development with a physical office in Amsterdam, focused on increasing developer satisfaction, growth, and productivity.

I moderate the bitcoindev mailing list and am involved with the BIP editor process, Delving Bitcoin, and BitDevs Amsterdam. In the past I've run the Seoul Bitcoin Meetup (2014-2020) and co-hosted the Unhashed Podcast (2018-2022).

I

Open terminal and go to your project's lib folder. After that run the command below.
find . -name '*.dart' ! -name '*.g.dart' ! -name '*.freezed.dart' ! -name '*.gr.dart' ! -name '*.gen.dart' | xargs wc -l

Thanks @AcetylsalicylicAcid for excluding generated files.

	<?php

	error_reporting(E_ALL);
	$opts = getopt('f:d:rb:', ['ext:', 'php:', 'diff::']);

	if ((int)isset($opts['d']) + (int)isset($opts['f']) !== 1) {
	$self = basename(__FILE__);
	echo <<<EOF
	Usage:
	php $self -f<php_script> [-b] [--php <path_to_php>] [ --diff [<file>]]

	#!/bin/bash

	# Just a simple wrapper to start bitcoind.
	#
	# If using systemd, simply create a file (e.g. /etc/systemd/system/bitcoind.service)
	# from example file below and add this script in ExecStart.
	# https://raw.521000.best-/bitcoin/bitcoin/76deb30550b2492f9c8d9f0302da32025166e0c5/contrib/init/bitcoind.service
	#
	# Then run following to always start:
	# systemctl enable bitcoind