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

• Supported are

  • Coldcard, Coldcard Q, Bitbox02, Blockstream Jade, Trezor Safe, Foundation Passport, Keystone, Ledger, Specter DIY

• 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 (this however only works with all devices after initialization)

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

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