ModuleNotFoundError: hwilib.devices.trezorlib.transport.bridge

[k9ert]

This looks like this in one of my tests:

.env/lib/python3.8/site-packages/hwilib/devices/trezorlib/transport/__init__.py:133: in get_transport
    return next(iter(enumerate_devices()))
.env/lib/python3.8/site-packages/hwilib/devices/trezorlib/transport/__init__.py:116: in enumerate_devices
    for transport in all_transports():
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

    def all_transports() -> Iterable[Type[Transport]]:
>       from .bridge import BridgeTransport
E       ModuleNotFoundError: No module named 'hwilib.devices.trezorlib.transport.bridge'

.env/lib/python3.8/site-packages/hwilib/devices/trezorlib/transport/__init__.py:102: ModuleNotFoundError

Here is a linkk to that code:
https://github.com/bitcoin-core/HWI/blob/master/hwilib/devices/trezorlib/transport/__init__.py#L102

I can't see any module like this?!

[prusnak]

It seems that HWI copy of trezorlib does not contain this module: https://github.com/trezor/trezor-firmware/blob/master/python/src/trezorlib/transport/bridge.py

[achow101]

Are you accessing HWI's built-in trezorlib directly? AFAICT HWI does not use anything that reaches this line so we don't see this error.

If you are, this kind of usage is not supported.

[k9ert]

This issue occurs while instantiating the TrezorClient like this:

TrezorClient(device["path"], passphrase, transport=get_transport())

In HWI 2.0.2 the TrezorClient got instantiated like this:

TrezorClient(device["path"], passphrase)

which results in this issue in 2.1.0:

tests/test_hwi_rpc.py:41: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
src/cryptoadvance/specter/helpers.py:81: in wrapper_fn
    return fn(*args, **kwargs)
src/cryptoadvance/specter/hwi_rpc.py:182: in prompt_pin
    with self._get_client(
/usr/lib/python3.8/contextlib.py:113: in __enter__
    return next(self.gen)
src/cryptoadvance/specter/hwi_rpc.py:420: in _get_client
    client = devcls.get_client(
src/cryptoadvance/specter/devices/trezor.py:16: in get_client
    return TrezorClient(*args, **kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <hwilib.devices.trezorlib.client.TrezorClient object at 0x7f3bdfb7b6d0>, transport = 'webusb:003:1:1:4', ui = '', session_id = None

    def __init__(
        self,
        transport,
        ui,
        session_id=None,
    ):
>       LOG.info("creating client instance for device: {}".format(transport.get_path()))
E       AttributeError: 'str' object has no attribute 'get_path'

.env/lib/python3.8/site-packages/hwilib/devices/trezorlib/client.py:91: AttributeError

So i did what's written in the documentation of the class:

    You have to provide a transport, i.e., a raw connection to the device. You can use
    `trezorlib.transport.get_transport` to find one.

[achow101]

hwilib.devices.trezorlib.client.TrezorClient is trezorlib's TrezorClient, not HWI's TrezorClient. So you're trying to use the underlying library objects directly, which is not supported by HWI.

[k9ert]

Ok, got it instead of:

from hwilib.devices.trezorlib.client import TrezorClient

i did

from hwilib.devices.trezor import TrezorClient

and it now works. It was not obvious to me. Thanks.