Qrexec & internal network specialist needed

Zaro · August 30, 2021, 11:36am

Hello,

I am interested in setting up an internal inter cube communication system for use with a daemon, and need help from someone who’s experienced with qrexec and internal networking.

unman · August 30, 2021, 2:30pm

PM me.
If it’s of general interest ,(and you are happy to do so), we can produce
write up, once done.

Zaro · August 30, 2021, 4:53pm

Hello,

I have recently made a new user support topic, which addresses the need to set up a single online Bitcoin, ETH, XMR, Zcash, etc daemons, and offline/online VMs securely connect with these daemon via qrexec for generating, and validating transactions.

I am using the following applications: Wasabi, Electrum, XMR core, Coinomi, JoinMarket, ETH electrum, and some more. They are in separate VMs.

I would really really appreciate your help

Zaro · August 30, 2021, 4:55pm

I intend to use separate applications which all need a full running bitcoin core.

I am running each application in its own VM. However, I don’t have enough storage for running 5 separate VMs with their own Bitcoin cores.

I want some help with running a single bitcoin core, which is online, and communicates with other bitcoin core applications that are being run in offline VMs.

Zaro · August 30, 2021, 4:57pm

I am looking for the extension of the following guide, for running a full core of ETH, XRP, XMR, BTC, LTC, ZCASH, etc.

github.com

qubenix/qubes-whonix-bitcoin/blob/master/1_joinmarket.md

# Qubes 4 & Whonix 15: JoinMarket
Create a VM without networking to host a [JoinMarket](https://github.com/JoinMarket-Org/joinmarket-clientserver) wallet. The `joinmarketd` daemon will run on the `bitcoind` VM, communicate only over Tor onion services, and use stream isolation.

The offline `joinmarket` VM will communicate with your `bitcoind` VM using Qubes' [`qrexec`](https://www.qubes-os.org/doc/qrexec3/).
## What is JoinMarket?
Joinmarket is an open source, decentralized, and trustless market for [coinjoins](https://en.bitcoin.it/wiki/CoinJoin). Anyone holding Bitcoin can offer coinjoins for a fee, and anyone can pay a fee to have their transactions obfuscated.

See the [Bitcoin wiki](https://en.bitcoin.it/wiki/JoinMarket) for a more detailed explanation of JoinMarket.
## Why Do This?
This increases the privacy and security of your JoinMarket wallet while still maintaining full functionality. Enhanced privacy is achieved by using only Tor onion endpoints, and security is improved by removing the need for a network connection on the wallet VM.
## Prerequisites
- To complete this guide you must have first completed:
  - [`0_bitcoind.md`](https://github.com/qubenix/qubes-whonix-bitcoin/blob/master/0_bitcoind.md)

## I. Set Up Dom0
### A. In a `dom0` terminal, create an AppVM.
1. Create the AppVM for JoinMarket's wallet with no networking, using the `whonix-ws-15-bitcoin` TemplateVM.

**Notes:**
- You must choose a label color, but it does not have to match this example.

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