openoms openoms

Design for a CoinSwap Implementation for Massively Improving Bitcoin Privacy and Fungibility

25/5/2020

Abstract

Imagine a future where a user Alice has bitcoins and wants to send them with maximal privacy, so she creates a special kind of transaction. For anyone looking at the blockchain her transaction appears completely normal with her coins seemingly going from address A to address B. But in reality her coins end up in address Z which is entirely unconnected to either A or B.

Now imagine another user, Carol, who isn't too bothered by privacy and sends her bitcoin using a regular wallet which exists today. But because Carol's transaction looks exactly the same as Alice's, anybody analyzing the blockchain must now deal with the possibility that Carol's transaction actually sent her coins to a totally unconnected address. So Carol's privacy is improved even though she didn't change her behaviour, and perhaps had never even heard of this software.

Chris Belcher's Work Diary

I keep a diary of all the work I do on bitcoin privacy.

It may also be interesting to my collaborators and donors, and anyone who wants to follow how my projects are going (these days I'm almost exclusively working on developing CoinSwap, see https://gist.github.com/chris-belcher/9144bd57a91c194e332fb5ca371d0964).

Support this work with a donation: https://bitcoinprivacy.me/coinswap-donations

Balance-Oriented Autopilot

Preamble

I want to bring to your attention the autopilot algorithm, built on simple principles, but which is effective (from my point of view). There is no need to qualify network nodes by types such as for example: Merchant, Router, Useless (i used Vampire term) and so on. The algorithm is very simple and here is its description.

Description

With some nodes we already have channels. We need to decide when we need to open new channels and with what capacity. We get a list of already open channels and create counters (accumulators) (newCapacity) with zero initialization for each node with which we have a channel.

	#/bin/bash

	DATE=$(date)

	runAutossh() {
	/usr/bin/autossh -M 20000 -Nf -R PORT:127.0.0.1:PORT USER@REMOTE_IP
	if [[ $? -eq 0 ]]; then
	echo Tunnel to REMOTE_IP created successfully
	else
	echo An error occurred creating a tunnel

	#!/bin/bash

	# bash <(curl -s https://gist.githubusercontent.com/CandleHater/c36f8c205b31f70081d9e821bde36ebb/raw/initial-setup.sh)

	# TODO
	# - rename initial.sh + move gist to repo
	# - bootloader configs https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md
	# - split up parts to several bash scripts and create repository

	# apt packages

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	#!/bin/sh
	# by dennisreimann
	# most of this is taken from Stadicus:
	# https://stadicus.github.io/RaspiBolt/raspibolt_61_system-overview.html

	# set colors
	color_red='\033[0;31m'
	color_green='\033[0;32m'
	color_yellow='\033[0;33m'
	color_blue='\033[0;34m'

	These instructions are outdated.
	Please visit https://btcpi.com for detailed instructions on installing BTCPayServer on the Raspberry Pi 4B.


	#Install Dot-Net for ARM
	cd /home/admin
	sudo apt-get -y install libunwind8 gettext libssl1.0
	wget https://download.visualstudio.microsoft.com/download/pr/9650e3a6-0399-4330-a363-1add761127f9/14d80726c16d0e3d36db2ee5c11928e4/dotnet-sdk-2.2.102-linux-arm.tar.gz
	wget https://download.visualstudio.microsoft.com/download/pr/9d049226-1f28-4d3d-a4ff-314e56b223c5/f67ab05a3d70b2bff46ff25e2b3acd2a/aspnetcore-runtime-2.2.1-linux-arm.tar.gz
	sudo mkdir /opt/dotnet

	## Getting LND working with Dojo

	## Written for use with Ubuntu Desktop 18.04 LTS & Dojo v1.0.0 ##

	## Start Dojo
	$ cd /path/to/docker/my-dojo/ && sudo ./dojo.sh start

	## Login to the bitcoind docker container as root
	$ sudo docker exec -u root -it bitcoind /bin/bash

	#### Copy over block data to your Dojo ####

	## If you wanted to MOVE over the data instead of copying it, see --> https://gist.github.com/05nelsonm/5c3607a3ad7d138d908e8a3d985a0df0

	## Written for use with Ubuntu Desktop 18.04 LTS & Dojo v1.0.0 ##

	## On your machine running Dojo, open 2 terminals, we'll call them [terminal A] & [terminal Doc]

	## In [terminal A] Check the size of your .bitcoin directory
	$ df -hf ~/.bitcoin