Wrapper around hwi, such that one can sign bdk PSBTs directly

• This provides an abstraction layer ontop of hwi, such that only bdk is needed from the outside

• Currently supported are

  • Coldcard, Q
  • Bitbox02
  • Blockstream Jade
  • Trezor Safe

• It also provides

  • AddressTypes, which are the commonly used bitcoin output descriptor templates
  • seed_tools.derive_spk_provider to derive xpubs from seeds for all AddressTypes (bdk does not support multisig templates currently https://github.com/bitcoindevkit/bdk/issues/1020)
  • SoftwareSigner which can sign single and multisig PSBTs, this doesn't do any security checks, so only use it on testnet
  • HWIQuick to list the connected devices without the need to unlock them

Demo

Run the demo with

python demo.py

Tests

Run tests

python -m pytest -vvv  --log-cli-level=0

Library Usage

• For xpub derivation bip_utils is used
• For signing a psbt python-bitcointx is used

Install package

From pypi

pip install bitcoin_usb

From git

• Install requirements:

poetry install

• Automatic commit formatting

pip install pre-commit
pre-commit install

• Run the precommit manually for debugging

pre-commit run --all-files