To keep the tutorial hardware-independent we will only use Serial, both for "GUI" and for transactions. It will show you the logic behind the library and then you can add your favorite GUI library, buttons or whatever you use and make it more functional.
Any decent board with 32-bit microcontroller would work - esp32, for example M5Stack or TTGO, stm32 boards, Adafruit M0 or M4 series (better M4) and many others.
In the tutorial we will to the following:
- Generate a recovery phrase from entropy
- Derive root key from mnemonic and password
- Derive an account and print the master public key
- Print first 5 receiving addresses
- Parse PSBT transaction and outputs
- Check if we have a change output and hide it
- Sign PSBT transaction and print it
Let's start with the recovery phrases!