Gupax is a (Windows|macOS|Linux) GUI for mining Monero on P2Pool, using XMRig.

To see a 3-minute video on how to download and run Gupax: click here.

Contents

• What is Monero/P2Pool/XMRig/Gupax?
• How-To
• Simple
  • Gupax
  • P2Pool
  • XMRig
• Advanced
  • Verifying
  • Running a Local Monero Node
  • Command Line
  • Key Shortcuts
  • Resolution
  • Tor/Arti
  • Logs
  • Disk
  • Swapping P2Pool/XMRig
  • Gupax
  • P2Pool
  • XMRig
• Connections
• Community Monero Nodes
• Build
  • General Info
  • Linux
    • Building for a distribution
  • macOS
  • Windows
• License
• FAQ
  • Where are updates downloaded from?
  • Can I quit mid-update?
  • Bundled vs Standalone
  • How much memory does Gupax use?
  • How is sudo handled? (on macOS/Linux)
  • Why does Gupax need to be Admin? (on Windows)

What is Monero/P2Pool/XMRig/Gupax?

Monero is a secure, private, and untraceable cryptocurrency.

The Monero GUI software lets you run a Monero node (among other things). A Monero node connects you to other peers and lets you download Monero's blockchain.

More info here.

---

P2Pool is software that lets you create/join decentralized peer-to-peer Monero mining pools.

P2Pool as a concept was first developed for Bitcoin but was never fully realized due to many limitations. These limitations were fixed when SChernykh rewrote P2Pool from scratch for Monero. P2Pool combines the best of solo mining and traditional pool mining:

• It's decentralized: There's no central server that can be shutdown or pool admin that controls your hashrate
• It's permissionless: It's peer-to-peer so there's no one to decide who can and cannot mine on the pool
• It's trustless: Funds are never in custody, all pool blocks pay out to miners directly and immediately
• 0% transaction fee, 0 payout fee, immediate ~0.0003 XMR minimum payout

More info here.

---

XMRig is an optimized miner which mines Monero at higher speeds.

Both Monero and P2Pool have built in miners but XMRig is quite faster than both of them. Due to issues like anti-virus flagging, it is not feasible to integrate XMRig directly into Monero or P2Pool, however, XMRig is still freely available for anyone to download with the caveat being: you have to set it up yourself.

More info here.

---

Gupax is a GUI that helps with configuring, updating, and managing P2Pool & XMRig (both originally CLI-only).

Recap:

1. XMRig mines to P2Pool which fetchs blocks from a Monero node
2. Monero GUI runs the Monero node
3. Gupax runs P2Pool/XMRig

By default, though, Gupax will use a Community Monero Node so you don't even have to run your own full Monero node to start mining on P2Pool:

How-To

https://user-images.githubusercontent.com/101352116/207978455-6ffdc0cc-204c-4594-9a2f-e10c505745bc.mp4

1. Download the bundled version of Gupax for your OS here or from gupax.io
2. Extract somewhere (Desktop, Documents, etc)
3. Launch Gupax
4. Input your Monero address in the [P2Pool] tab
5. Select a Community Monero Node that you trust
6. Start P2Pool
7. Start XMRig

You are now mining to your own instance of P2Pool, welcome to the world of decentralized peer-to-peer mining!

Notes:

• What is bundled? What is standalone?
• If you'd like to get deeper into the settings, see Advanced.

Simple

The Gupax/P2Pool/XMRig tabs have two versions, Simple & Advanced.

Simple is for a minimal & working out-of-the-box configuration.

Gupax

In this tab, there is the updater and general Gupax settings.

If Check for updates is pressed, Gupax will update your Gupax/P2Pool/XMRig (if needed) using the GitHub API.

Below that, there are some general Gupax settings:

Setting	What does it do?
Update via Tor	Causes updates to be fetched via the Tor network. Tor is embedded within Gupax; a Tor system proxy is not required
Auto-Update	Gupax will automatically check for updates at startup
Auto-P2Pool	Gupax will automatically start P2Pool at startup
Auto-XMRig	Gupax will automatically start XMRig at startup
Ask before quit	Gupax will ask before quitting (and notify if there are any updates/processes still alive)
Save before quit	Gupax will automatically saved any un-saved setting on quit

---

P2Pool

P2Pool Simple allows you to ping & connect to a Community Monero Node and start your own local P2Pool instance on the Mini sidechain.

To start P2Pool, first input the Monero address you'd like to receive payouts from. You must use a primary Monero address to mine on P2Pool (starts with a 4). It is highly recommended to create a new wallet since addresses are public on P2Pool!

Warning: There are negative privacy/security implications when using a Monero node not in your control. Select a community node that you trust, or better yet, run your own node. If you'd like to manually specify a node to connect to, see Advanced.

---

XMRig

XMRig Simple has a log output box, a thread slider, and Pause-on-active setting.

If XMRig is started with Pause-on-active with a value greater than 0, XMRig will automatically pause for that many seconds if it detects any user activity (mouse movements, keyboard clicks). This setting is only available on Windows/macOS.

Windows:
Gupax will automatically launch XMRig with administrator privileges to activate mining optimizations. XMRig also needs a signed WinRing0 driver (© 2007-2009 OpenLibSys.org) to access MSR registers. This is the file next to XMRig called WinRing0x64.sys. This comes in the bundled version of Gupax. If missing/deleted, a copy is packaged with all Windows XMRig releases. A direct standalone version is also provided, here.

macOS/Linux:
Gupax will prompt for your sudo password to start XMRig with and do all the things above.

XMRig Simple will always mine to your own local P2Pool (127.0.0.1:3333), if you'd like to manually specify a pool to mine to, see Advanced.

Advanced

Verifying

It is recommended to verify the hash and PGP signature of the download before using Gupax.

Download the SHA256SUMS file, download and import my PGP key, and verify:

sha256sum -c SHA256SUMS
gpg --import hinto-janaiyo.asc
gpg --verify SHA256SUMS

Q: How can I be sure the P2Pool/XMRig bundled with Gupax hasn't been tampered with?
A: Verify the hash.

You can always compare the hash of the P2Pool/XMRig binaries bundled with Gupax with the hashes of the binaries found here:

• https://github.com/SChernykh/p2pool/releases
• https://github.com/xmrig/xmrig/releases

Make sure the version you are comparing against is correct, and make sure you are comparing the binary to the binary, not the tar/zip. If they match, you can be sure they are the exact same. Verifying the PGP signature is also recommended:

• P2Pool - SChernykh.asc
• XMRig - xmrig.asc

---

Running a Local Monero Node

Running and using your own local Monero node improves privacy and security. It also means you won't be depending on one of the Community Monero Nodes provided by Gupax. This comes at the cost of downloading and syncing Monero's blockchain yourself (currently 155GB).

If you'd like to run and use your own local Monero node for P2Pool, follow these steps:

1. In the Monero GUI, go to Settings
2. Go to the Node tab
3. Enable Local node
4. Enter --zmq-pub=tcp://127.0.0.1:18083 into Daemon startup flags

After syncing the blockchain, you will now have your own Monero node. The 4th step enables ZMQ, which is extra Monero node functionality that is needed for P2Pool to work correctly.

For much more detailed information on configuring a Monero node, click here.

---

Command Line

Gupax comes with some command line options:

USAGE: ./gupax [--flag]

    --help         Print this help message
    --version      Print version and build info
    --state        Print Gupax state
    --nodes        Print the manual node list
    --no-startup   Disable all auto-startup settings for this instance
    --reset-state  Reset all Gupax state (your settings)
    --reset-nodes  Reset the manual node list in the [P2Pool] tab
    --reset-pools  Reset the manual pool list in the [XMRig] tab
    --reset-all    Reset the state, the manual node list, and the manual pool list
    --ferris       Print an extremely cute crab

By default, Gupax has auto-update & auto-ping enabled. This can only be turned off in the GUI which causes a chicken-and-egg problem. To get around this, start Gupax with --no-startup. This will disable all auto features for that instance.

---

Key Shortcuts

The letter keys (Z/X/S/R) will only work if nothing is in focus, i.e, you are not editing a text box.

An ALT+F4 will also trigger the exit confirm screen (if enabled).

*---------------------------------------*
|             Key shortcuts             |
|---------------------------------------|
|             F11 | Fullscreen          |
|          Escape | Quit screen         |
|              Up | Start/Restart       |
|            Down | Stop                |
|               Z | Switch to Left Tab  |
|               X | Switch to Right Tab |
|               S | Save                |
|               R | Reset               |
*---------------------------------------*

---

Resolution

The default resolution of Gupax is 1280x960 which is a 4:3 aspect ratio.

This can be changed by dragging the corner of the window itself or by using the resolution sliders in the Gupax Advanced tab. After a resolution change, Gupax will fade-in/out of black and will take a second to resize all the UI elements to scale correctly to the new resolution.

If you have changed your OS's pixel scaling, you may need to resize Gupax to see all UI correctly.

The minimum window size is: 640x480
The maximum window size is: 2560x1920
Fullscreen mode can also be entered by pressing F11.

---

Tor/Arti

By default, Gupax updates via Tor. In particular, it uses Arti, the official Rust implementation of Tor.

Instead of bootstrapping onto the Tor network every time, Arti saves state/cache about the Tor network (circuits, guards, etc) for later reuse onto the disk:

State:

OS	Data Folder
Windows	C:\Users\USER\AppData\Local\torproject\Arti\data
macOS	/Users/USER/Library/Application Support/org.torproject.Arti
Linux	/home/USER/.local/share/arti

Cache:

OS	Data Folder
Windows	C:\Users\USER\AppData\Local\torproject\Arti\cache
macOS	/Users/USER/Library/Caches/org.torproject.Arti
Linux	/home/USER/.cache/arti

---

Disk

Long-term state is saved onto the disk in the "OS data folder", using the TOML format. If not found, default files will be created.

Given a slightly corrupted state.toml file, Gupax will attempt to merge it with a new default one. This will most likely happen if the internal data structure of state.toml is changed in the future (e.g removing an outdated setting). The node/pool database cannot be merged.

If Gupax can't read/write to disk at all, or if there are any other big issues, it will show an un-recoverable error screen.

OS	Data Folder	Example
Windows	{FOLDERID_RoamingAppData}	C:\Users\USER\AppData\Roaming\Gupax
macOS	$HOME/Library/Application Support	/Users/USER/Library/Application Support/Gupax
Linux	$XDG_DATA_HOME or $HOME/.local/share	/home/USER/.local/share/gupax

The current files saved to disk:

• state.toml Gupax state/settings
• node.toml The manual node database used for P2Pool advanced
• pool.toml The manual pool database used for XMRig advanced

---

Logs

Gupax has console logs that show with increasing detail, what exactly it is is doing.

There are multiple log filter levels but by default, INFO and above are enabled. To view more detailed console debug information, start Gupax with the environment variable RUST_LOG set to a log level like so:

RUST_LOG=(trace|debug|info|warn|error) ./gupax

For example:

RUST_LOG=debug ./gupax

In general:

• ERROR means something has gone wrong and that something will probably break
• WARN means something has gone wrong, but things will be fine
• INFO logs are general info about what Gupax (the GUI thread) is currently doing
• DEBUG logs are much more verbose and include what EVERY thread is doing (not just the main GUI thread)
• TRACE logs are insanely verbose and shows very low-level logs of the libraries Gupax uses (HTTP connections, GUI polling, etc)

---

Swapping P2Pool/XMRig

If you want to use your own P2Pool/XMRig binaries and/or want to swap them, you can:

• Edit the PATH in Gupax Advanced to point at the new binaries
• Change the binary itself

By default, Gupax will look for P2Pool/XMRig in folders next to itself:

Windows:

Gupax\
├─ Gupax.exe
├─ P2Pool\
│  ├─ p2pool.exe
├─ XMRig\
   ├─ xmrig.exe

macOS (Gupax is packaged as an .app on macOS):

Gupax.app/Contents/MacOS/
├─ gupax
├─ p2pool/
│  ├─ p2pool
├─ xmrig/
   ├─ xmrig

Linux:

gupax/
├─ gupax
├─ p2pool/
│  ├─ p2pool
├─ xmrig/
   ├─ xmrig

---

Gupax

Along with the updater and settings mentioned in Simple, Gupax Advanced allows you to change:

• The PATH of where Gupax looks for P2Pool/XMRig
• Gupax's resolution
• The selected tab on startup

Warning: Gupax will use your custom PATH/binary and will replace them if you use Check for updates in the [Gupax] tab. There are sanity checks in place, however. Your PATH MUST end in a value that appears correct or else the updater will refuse to start:

Binary	Accepted values	Good PATH	Bad PATH
P2Pool	P2POOL, P2Pool, P2pool, p2pool	P2pool/p2pool	Documents/my_really_important_file
XMRig	XMRIG, XMRig, Xmrig, xmrig	XMRig/XMRig	Desktop/

If using Windows, the PATH must end with .exe.

---

P2Pool

P2Pool Advanced has:

• Terminal input
• Overriding command arguments
• Manual node list
• P2Pool Main/Mini selection
• Out/In peer setting
• Log level setting

The overriding command arguments will completely override your Gupax settings and start P2Pool with those arguments.
Warning: If using this setting, use --no-color and make sure to set --data-api <PATH> & --local-api so that the [Status] tab can work!

The manual node list allows you save and connect up-to 1000 custom Monero nodes:

Data Field	Purpose	Limits	Max Length
Name	A unique name to identify this node (only for Gupax purposes)	Only [A-Za-z0-9-_.] and spaces allowed	30 characters
IP	The Monero Node IP to connect to with P2Pool	It must be a valid IPv4 address or a valid domain name	255 characters
RPC	The RPC port of the Monero node	[1-65535]	5 characters
ZMQ	The ZMQ port of the Monero node	[1-65535]	5 characters

The Main/Mini selector allows you to change which P2Pool sidechain you mine on:

P2Pool Sidechain	Description	Use-case
Main	More miners, finds blocks faster, has a higher difficulty	Suitable for miners with MORE than 50kH/s
Mini	Less miners, finds blocks slower, has a lower difficulty	Suitable for miners with LESS than 50kH/s

Given enough time, both Main and Mini will result in the same reward (as will solo mining):

Mining Method	Share Behavior	Payout/Output Behavior	Example	Total (it's the same)
P2Pool Main	LESS frequent shares that are MORE valuable	Results in MORE outputs worth LESS	20 shares, 100 outputs worth 0.006 XMR	0.6 XMR
P2Pool Mini	MORE frequent shares that are LESS valuable	Results in LESS outputs worth MORE	100 shares, 20 outputs worth 0.03 XMR	0.6 XMR
Solo mining	No shares, only payouts	1 output	1 output worth the block reward: 0.6 XMR	0.6 XMR

In the end, it doesn't matter too much which sidechain you pick, it will all average out. Getting LESS but more valuable outputs may be desired, however, since the transaction cost to combine all of them (sweep_all) will be cheaper due to being comprised of less outputs.

The remaining sliders control miscellaneous settings:

Slider	Purpose	Default	Min/Max Range
Out peers	How many out-bound peers P2Pool will connect to	10	10..450
In peers	How many in-bound peers P2Pool will allow to connect to you	10	10..450
Log level	Verbosity of the P2Pool console log	3	0..6

---

XMRig

XMRig Advanced has:

• Terminal input
• Overriding command arguments
• Custom payout address
• CPU thread slider
• Manual pool list
• Custom HTTP API IP/Port
• TLS setting
• Keepalive setting

The overriding command arguments will completely override your Gupax settings and start XMRig with those arguments.
Warned: If using this setting, use [--no-color] and make sure to set [--http-host <IP>] & [--http-port <PORT>] so that the [Status] tab can work!

The manual pool list allows you save and connect up-to 1000 custom Pools (regardless if P2Pool or not):

Data Field	Purpose	Limits	Max Length
Name	A unique name to identify this pool (only for Gupax purposes)	Only [A-Za-z0-9-_.] and spaces allowed	30 characters
IP	The pool IP to connect to with XMRig	It must be a valid IPv4 address or a valid domain name	255 characters
Port	The port of the pool	[1-65535]	5 characters
Rig	An optional rig ID; This will be the name shown on the pool	Only [A-Za-z0-9-_] and spaces allowed	30 characters

The HTTP API textboxes allow you to change to IP/Port XMRig's HTTP API opens up on:

Data Field	Purpose	Default	Limits	Max Length
HTTPS API IP	The IP XMRig's HTTP API server will bind to	localhost/127.0.0.1	It must be a valid IPv4 address or a valid domain name	255 characters
HTTP API Port	The port XMRig's HTTP API server will bind to	18088	[1-65535]	5 characters

The remaining buttons control miscellaneous settings (both are disabled by default, as P2Pool does not require them):

Button	Purpose
TLS Connection	Enables SSL/TLS connections (needs pool support)
Keepalive	Enables sending keepalive packets to prevent timeout (needs pool support)

Connections

For transparency, here's all the connections Gupax makes:

Domain	Why	When	Where
https://github.com	Fetching metadata information on packages + download	[Gupax] tab -> Check for updates	update.rs
Community Monero Nodes	Connecting to with P2Pool, measuring ping latency	[P2Pool Simple] tab	node.rs
DNS	DNS connections will usually be handled by your OS (or whatever custom DNS setup you have). If using Tor, DNS requests for updates should be routed through the Tor network automatically	All of the above	All of the above

Community Monero Nodes

These are the community nodes used by Gupax in the [P2Pool Simple] tab. If you would like to have a node added/removed, please submit an Issue with the reasoning.

In general, a suitable node needs to:

• Be fast
• Have good uptime
• Have RPC enabled
• Have ZMQ enabled
• Have an owner known by the general Monero community

Name	IP/Domain	RPC Port	ZMQ Port
C3pool	node.c3pool.com	18081	18083
Cake	xmr-node.cakewallet.com	18081	18083
CakeEu	xmr-node-eu.cakewallet.com	18081	18083
CakeUk	xmr-node-uk.cakewallet.com	18081	18083
CakeUs	xmr-node-usa-east.cakewallet.com	18081	18083
Feather1	selsta1.featherwallet.net	18081	18083
Feather2	selsta2.featherwallet.net	18081	18083
MajesticBankIs	node.majesticbank.is	18089	18083
MajesticBankSu	node.majesticbank.su	18089	18083
Monerujo	nodex.monerujo.io	18081	18083
Plowsof1	node.monerodevs.org	18089	18084
Plowsof2	node2.monerodevs.org	18089	18084
Rino	node.community.rino.io	18081	18083
Seth	node.sethforprivacy.com	18089	18083
SupportXmr	node.supportxmr.com	18081	18083
SupportXmrIr	node.supportxmr.ir	18089	18083
XmrVsBeast	p2pmd.xmrvsbeast.com	18081	18083

Build

General Info

You need cargo, Rust's build tool and package manager.

The --release profile in Gupax is set to prefer code performance & small binary sizes over compilation speed (see Cargo.toml). Gupax itself (with all dependencies already built) takes around 1m30s to build (vs 10s on a normal --release) with a Ryzen 5950x.

There are 38 unit tests throughout the codebase files, you should probably run:

cargo test

before attempting a full build.

---

Linux

You'll need the development versions of libraries like OpenSSL, SQLite, and maybe some other ones already installed on your system. Read the compiler errors to see which ones are missing from your system and search around to see which packages you'll need to install depending on your distro.

After that, run:

cargo build --release

The Linux release tars come with another file next to the Gupax binary: Gupax.AppImage. This is not an actual AppImage, it is just a text file that contains: ./gupax. This allows users to double-click and execute Gupax in file explorers like Nautilus in Ubuntu/Debian.

Building for a distribution

Gupax has a build flag for use as a package in a Linux distribution:

cargo build --release --features distro

This is the same as the --release profile, but with some changes:

Change	Reason
Built-in Update feature is disabled	Updates should be handled by the native package manager
Default P2Pool/XMRig path is /usr/bin/	P2Pool/XMRig exist in some repositories, which means they'll be installed in /usr/bin/

---

macOS

You'll need Xcode.

On macOS, if you want the binary to have an icon, you must install cargo-bundle and compile with:

cargo bundle --release

This bundles Gupax into a Gupax.app, the way it comes in the pre-built tars for macOS.

---

Windows

You'll need Visual Studio.

There is a build.rs file in the repo solely for Windows-specific things:

1. It sets the icon in File Explorer
2. It statically links VCRUNTIME140.dll into Gupax (the binary will not be portable without this)

After installing the development tools, run:

cargo build --release

This will build Gupax with the MSVC toolchain (x86_64-pc-windows-msvc). This is the recommended method and is how the pre-compiled release binaries are built.

License

The GUI library Gupax uses is egui. It is licensed under MIT & Apache 2.0.

Many other libraries are used that have various licenses.

Gupax, P2Pool, and XMRig are licensed under the GNU General Public License v3.0.

FAQ

Where are updates downloaded from?

The latest versions are downloaded using the GitHub API.

• Gupax https://github.com/hinto-janaiyo/gupax
• P2Pool https://github.com/SChernykh/p2pool
• XMRig https://github.com/xmrig/xmrig

GitHub's API blocks request that do not have an HTTP User-Agent header. Gupax uses a random recent version of a Wget/Curl user-agent.

---

Can I quit mid-update?

If you started an update, you should let it finish. If the update has been stuck for a long time, quitting Gupax is probably okay. The worst that can happen is that your Gupax/P2Pool/XMRig binaries may be moved/deleted. Those can be easily redownloaded. Your actual Gupax user data (settings, custom nodes, pools, etc) is never touched.

Although Gupax uses a temporary folder (gupax_update_[A-Za-z0-9]) to store temporary downloaded files, there aren't measures in place to revert an upgrade once the file swapping has actually started. If you quit Gupax anytime before the Upgrading packages phase (after metadata, download, extraction), you will technically be safe but this is not recommended as it is risky, especially since these updates can be very fast.

---

Bundled vs Standalone

Bundled Gupax comes the latest version of P2Pool/XMRig already in the zip/tar.

Standlone only contains the Gupax executable.

---

How much memory does Gupax use?

Gupax itself uses around 100-300 megabytes of memory.

Gupax also holds up to 500,000 bytes of log data from P2Pool/XMRig to display in the GUI terminals. These logs are reset once over capacity which takes around 1-4 hours.

Memory usage should never be above 500~ megabytes. If you see Gupax using more than this, please send a bug report.

---

How is sudo handled? (on macOS/Linux)

See here for more info.

---

Why does Gupax need to be Admin? (on Windows)

See here for more info.