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https://github.com/arcbtc/bowser-bitcoin-hardware-wallet
ESP32 Hardware Wallet
https://github.com/arcbtc/bowser-bitcoin-hardware-wallet
Last synced: about 2 months ago
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ESP32 Hardware Wallet
- Host: GitHub
- URL: https://github.com/arcbtc/bowser-bitcoin-hardware-wallet
- Owner: arcbtc
- License: mit
- Archived: true
- Created: 2020-06-01T14:04:26.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2022-12-17T16:33:52.000Z (about 2 years ago)
- Last Synced: 2024-05-19T00:44:47.855Z (8 months ago)
- Language: C
- Size: 485 KB
- Stars: 76
- Watchers: 9
- Forks: 19
- Open Issues: 5
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Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-embedded-blockchain - Bowser - tutorial](https://www.youtube.com/watch?v=DG1zrlAVdys)) (Awesome Embedded Bitcoin [![Awesome](https://awesome.re/badge-flat.svg)](https://awesome.re) / Embedded Projects)
- awesome-BTC-embedded - Bowser Bitcoin hardware wallet
README
ARCHIVED PLEASE SEE UPDATED VERSION HERE!!!
BOWSER, DIY BITCOIN HARDWARE WALLET V1
> Join our telegram support/chat.
Building your own hardware wallet is a bit like building a lightsaber, only really necessary if you want to be a Jedi.
Now building hardware wallets is easy with the help of uBitcoin an Arduino library created by Stepan Snigirev.
Building hardware wallets not only gives greater autonomy/liberty, it is an excellent excuse to get a deeper understanding of how bitcoin keys, seeds and signing works.
For use with Electrum Wallet 3.3.8 https://download.electrum.org/3.3.8/
## Disclaimer/risk-profile
Project is out of beta and ready for use, but use at your own risk.
Its best to think of Bowser wallet like a cold storage paper wallet that can sign transactions. Some security is achieved by the passphrase being stored/verified as a hash, however the mnemonic is stored in an accessible location on the device and the passphrase could be brute forced, so the wallet details are only pseudo-secure on the device.
The risk/use profile of Bowser is storing in a secure location as you would with a paper wallet, the benefit of Bowser is it gives the option to sign transactions via PSBTs on an offline, dedicated device.## Latest version
https://github.com/arcbtc/bowser-bitcoin-hardware-wallet/releases/tag/v1
## Tutorial
https://www.youtube.com/watch?v=DG1zrlAVdys
## SD COMMANDS
Commands to enter into bowser.txt on the SD card.
Wipe device completely, setup new wallet:
`HARD RESET`Restore from a seed backup:
`RESTORE husband behind shallow promote....`Sign an Electrum transaction:
`SIGN 45505446ff00020000000001016cb....`## Morse-code cheat sheet
## Installing Arduino
Install Aruino IDE
https://www.arduino.cc/en/Guide/HomePageInstall ESP32 Boards
https://github.com/espressif/arduino-esp32/blob/master/docs/arduino-ide/boards_manager.md## Libraries Used
- uBitcoin (Download library from github and "Add Zip Library" in Arduino Library Manager...Tested with v1.0.2)
- M5Stack (Install from "Library Manager" in Arduino)
- [lvgl](https://lvgl.io/) (Install from "Library Manager" in Arduino, search as "lvgl", appears in the list as "lv_arduino")## Materials
- M5Stack (grey one is better)
- SD card (not sure if size is an issue for larger SD, 16GB works fine)