Ephemeral Wallet
DYI Arduino Ethereum wallet for standalone private key generation. This project it's for fun and in development, anyway the generated keys are good enough to be used
Tutorials and more information will be made available on Medium.
Why Arduino
Because is fun, cheap to build and we can generate a private key without a computer, internet or third providers.
Features
- Private key generation ETH & BTC (Elliptic Curve Cryptography)
- Wallet Address generation (ETH)
Future features
- PrivateKey importer: A command line tool por recovering your private key from the Arduino Board (with user agreement)
- Save PrivateKey in to EEPROM memory
- Low battery detection
Pending issues
- Auditing FireFly and Entrophy libraries used in this project.
Materials needed
| Part | Cost |
|---|---|
| Arduino board 2560 | $40.30 |
| LCD 16x2 I2C | $2.40 |
| IR receiver + RC | $5 |
| 6-cell AA Battery holder | $2.5 |
Optional enhancements
- You can replace the LCD 16x2 I2C with LCD 32x2 I2C or another diplay part. This replacement will enhance the user expirience showing in a one page all characters of private key generated (64 characters)
Supported Boards
- Just tested with Arduino Mega
Sketch board model
Usage
Once uploaded if posible view a little menu on lcd screen. This is a list of remote control keys with functional actions:
- Key 1: Private Key generation
- Key 2: View last private key generated
- Key 3: View ethereum address
- Key 6: View free memory
- Key *: Go to main menu
- Key Arrow down: Show the next 32 characters of private key
- Key Arrow up: Show the first 32 characters of private key
Futher information about usage will be found soon in this page https://medium.com/@gonzalobellino
Installation
prerequires
Arduino visual editor like this https://create.arduino.cc/editor or a command line client arduino-cli
Procedure using command-cli
git clone https://github.com/gonzalobellino/ephemeralwallet.git
cd ./arduino
arduino-cli config init
arduino-cli sketch new EphemeralWallet
arduino-cli core update-index
arduino-cli board list
arduino-cli core install arduino:avr
arduino-cli lib install "LiquidCrystal I2C"
arduino-cli lib install IRremote
arduino-cli compile --fqbn arduino:avr:mega EphemeralWallet.ino --libraries ./libraries --verbose -b arduino:avr:mega
arduino-cli upload -p COM3 --fqbn arduino:avr:mega -t -i EphemeralWallet.ino.arduino.avr.mega.hex
Futher information about usage will be found soon in this page https://medium.com/@gonzalobellino
Unvaluable libraries
This idea was possible with this libraries
Contact
Linkedin: https://www.linkedin.com/in/gonzalo-bellino-1a1877150/