ottosch / self-transfer.js

Last active June 12, 2025 14:54

Script to spend an UTXO to a single address, with custom fee rate

	#! /usr/bin/env node

	// Instructions: place the file inside a directory, run `npm init -y` and install dependencies with
	// `npm i bitcoinjs-lib@^6.1.1 ecpair@^2.1.0 tiny-secp256k1@^2.2.1`

	const bitcoin = require("bitcoinjs-lib");
	const ecc = require("tiny-secp256k1");
	const { ECPairFactory } = require("ecpair");
	const ECPair = ECPairFactory(ecc);
	bitcoin.initEccLib(ecc);

ottosch / tx-ascii-art.js

Created June 8, 2025 17:05

Code used to create transaction 749fdc72f1c99398899425253875deb1d7e5e040db14014ea57db71c610dad26 - #FreeSamourai

	#! /usr/bin/env node

	const fs = require("fs");
	const bitcoin = require("bitcoinjs-lib");
	const ecc = require("tiny-secp256k1");
	const { ECPairFactory } = require("ecpair");
	const ECPair = ECPairFactory(ecc);
	bitcoin.initEccLib(ecc);

	const network = bitcoin.networks.bitcoin;

ottosch / draw-tx.sh

Created May 3, 2025 22:28

Draws ASCII art from tx 5c4f060e6166a530d891cafd0e9df42441d29b1ed9cff71a1652201b8d50bd72

bitcoin-cli getrawtransaction 5c4f060e6166a530d891cafd0e9df42441d29b1ed9cff71a1652201b8d50bd72 2 | jq -r '.vout[].scriptPubKey.hex | sub("^.{6}"; "")' | while read -r output; do echo "$output" | xxd -p -r; echo; done

ottosch / dinner-inscription.js

Created May 3, 2025 21:50

Extract image inscription of tx 4be3a833ee83b4ca7d157d60fbf7411f7528314ce90df8a844f855118bc6ca11

	#! /usr/bin/env node

	// Invoke with: bitcoin-cli getrawtransaction 4be3a833ee83b4ca7d157d60fbf7411f7528314ce90df8a844f855118bc6ca11 \| ./dinner-inscription.js

	const { Transaction } = require('bitcoinjs-lib');

	if (process.stdin.isTTY) {
	console.error('raw tx needed, quitting...');
	process.exit(1);
	}

ottosch / restore-grub.md

Created February 25, 2025 02:02

How to restore GRUB using Arch Linux ISO

Partitions

/dev/sda1: ESP (EFI System Partition)
/dev/sda2: system + home
/dev/sda3: swap

Script

ottosch / verify-grapheneos-signature.md

Created February 10, 2025 23:16

How to verify GrapheneOS releases

Verifying GrapheneOS releases

Instructions taken from Obtaining Factory Images.

Get the signers' public keys

curl -O https://releases.grapheneos.org/allowed_signers

ottosch / twitter-revanced.md

Last active May 17, 2025 00:40

How to patch Twitter (X) with ReVanced

Benefits:

Hide ads;
Remove tracking when sharing links;
Enable video download;
Other benefits;

Download X apk

ottosch / laptop-lid.md

Last active January 13, 2025 21:57

Settings to avoid laptop sleeping after lid is closed

Laptop lid configuration

Ignore the lid being closed

sudo nano /etc/systemd/logind.conf, change these values to ignore:

HandleLidSwitch=ignore
HandleLidSwitchExternalPower=ignore
HandleLidSwitchDocked=ignore

ottosch / dimm.sh

Created January 9, 2025 13:52

Change screen brightness for the terminal

	#! /usr/bin/env bash

	# Sets brightness to parameter level [0, max_brightness]
	# Default: 10_000

	default=10000
	brightness=${1:-$default}
	max="$(cat /sys/class/backlight/*/max_brightness)"

	if test "$brightness" -eq "$brightness" 2>/dev/null; then # numeric value

ottosch / seed_picker.sh

Last active December 24, 2023 01:59

Find all possibilities for the last seed word

	#! /usr/bin/env bash

	function run() {
	read_wordlist

	local input
	printf "Enter seed words: "
	read -r input

	local seed_words=()