https://github.com/justinmoon/bitboy

A stateless, QR-airgapped hobbyist hardware wallet
https://github.com/justinmoon/bitboy

Last synced: 15 days ago
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A stateless, QR-airgapped hobbyist hardware wallet

• Host: GitHub
• URL: https://github.com/justinmoon/bitboy
• Owner: justinmoon
• Created: 2019-09-03T08:59:53.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2022-12-08T06:06:37.000Z (almost 2 years ago)
• Last Synced: 2024-08-04T22:13:05.555Z (3 months ago)
• Language: Python
• Homepage: https://diybitcoinhardware.com
• Size: 472 KB
• Stars: 64
• Watchers: 5
• Forks: 3
• Open Issues: 3
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-embedded-blockchain - BitBoy

README

        
# BitBoy

_A stateless, QR-airgapped hobbyist hardware wallet_

![image](./images/bitboy.jpg)

# Workflow:

- Enter BIP39 seed on QWERTY keyboard

- (Optional) Export XPUB to desktop wallet with QR on device display

- Import unsigned PSBT with QR scanner

- After confirming outputs & fees, BitBoy will sign it

- Export signed PSBT with QR on device display

# Shopping List

### BitBoy

QR code airgap, keyboard. $110.

- [M5stack "faces" kit](https://www.amazon.com/MakerFocus-Computer-Keyboard-Calculator-MicroPYTHON/dp/B078NHQWHP) ($70)

- [Waveshare industrial QR scanner](https://www.waveshare.com/barcode-scanner-module.htm) ($40)

### BitBoy "lite"

MicroSD airgap. $42.

- [M5Stack](https://www.amazon.com/M5Stack-Development-Extensible-Control-Prototype/dp/B07PWJMNRN) ($37)

- MicroSD card ($5)

# How it works:

- [Base MicroPython firmware](https://github.com/stepansnigirev/esp32_upy_bitcoin)

    - Bitcoin primitives

    - Drivers for display, buttons, keyboard

- `bitboy.py` in this repo contains the hardware wallet logic itself. It's a modern [asyncio](https://hackernoon.com/a-simple-introduction-to-pythons-asyncio-595d9c9ecf8c) event loop!

- `wallet.py` is a primitive watch-only wallet leveraging Bitcoin Core

- `ui.py` is a shitty UI connecting BitBoy and wallet.py / Bitcoin Core

- Eventually I want this all to work in [Junction](https://github.com/justinmoon/junction)

# Status

This is alpha software, testnet-only for now.

If you'd like to build one, buy the items in the shopping list. Instructions will be posted in the next week. You can [DM Justin with questions on Twitter](https://twitter.com/_justinmoon_).