oakwhiz

How to set up a bitcoin node on Debian using the official "hardened" systemd unit file, with external storage + testnet

Disclaimer of liability & warnings

It's your responsibility to handle Bitcoin correctly, failure to do so could cause cybersecurity breaches or financial losses, which you are solely responsible for. You should change all passwords, ensure you have a good firewall configuration, keep up-to-date, only use trusted sources for software and configuration, maintain your hardware, ensure working backups and redundancies, etc. You must also double check that these documents are not outdated, malicious or tampered with. The author(s) of these documents cannot be held responsible for losses or damages arising from use or misuse of the information within.

If you are using a bitcoin node in a commercial setting, you need to think about things like redundancy, uptime and recovery. What would happen if you were relying on a single bitcoin node and it went down? How long will it last if you "set it

	#!/usr/bin/env python3
	import sqlite3
	import struct
	from pathlib import Path
	import argparse
	from hashlib import sha256
	from time import time

	# Install these packages via pip if not already installed
	from ecdsa.numbertheory import square_root_mod_prime

	# START
	from mpmath import mp
	import numpy as np
	import matplotlib.pyplot as plt
	import cmath

	# Set the desired precision
	mp.dps = 50

	# Define the angles of the fundamental domain

	# jul/28/2022 00:34:21 by RouterOS 7.4rc2
	# incomplete config, do not use directly

	/ip firewall address-list
	add address=192.168.88.0/24 list=local
	add address=192.168.88.0/24 list=preferprimary
	add address=1.2.3.0/24 list=localnet-primary
	add address=4.5.6.0/24 list=localnet-backup
	add address=9.9.9.10 list=reserved-main
	add address=9.9.9.11 list=reserved-isp1

	#![feature(thread_sleep, std_misc)]

	extern crate winapi;
	extern crate "kernel32-sys" as kernel32;
	extern crate "user32-sys" as user32;

	fn main() {
	println!("About to hide the console.");
	sleep(1);
	unsafe {

	REM precache files into windows disk cache
	REM first argument should be the name of a folder
	REM all the files will be recursively copied to nul in order to put them in the disk cache

	FOR /R %1 %%F IN (*) DO copy /b "%%F" nul

	#!/bin/sh

	# Tunnel SSH over Layer 2 Ethernet (rough sketch)
	# requires FIFOs, netcat, linkcat

	testfun () {
	read line
	nc "${@}" < <(echo $line ; cat)
	}

	-- Simulation combinator.
	-- If (f x /= x) then try f f x, f f f x, etc.
	-- Keeps chaining f until nothing new happens, i.e. the simulation has "settled"
	-- Similar to the fixed point combinator but with a starting condition.
	simC :: Eq a => (a -> a) -> a -> a
	simC f x \| f x == x = x \| otherwise = simC f (f x)

	-- Same as above, but keeps a list of the intermediate states.
	-- let simCList :: Eq a => (a->a) -> [a] -> [a]; simCList f x \| f (last x) == (last x) = x \| otherwise = simCList f (x ++ [f (last x)])
	simCList :: Eq a => (a -> a) -> [a] -> [a]

	module Main where

	import Data.List (nub, (\\))
	import Data.Maybe (mapMaybe, catMaybes)
	import Control.Applicative

	import Debug.Hood.Observe