cannot import name 'encode_single' from 'eth_abi'

[abradshaw]

When trying to run python3 satochip_bridge/SatochipBridge.py I get the following (the requirements all installed ok)

$ python3 satochip_bridge/SatochipBridge.py
Traceback (most recent call last):
  File "/home/fab/abradsha/Nextcloud/Copy/git/Satochip-Bridge/satochip_bridge/SatochipBridge.py", line 10, in <module>
    from py_eth_sig_utils import eip712
  File "/home/fab/abradsha/.local/lib/python3.12/site-packages/py_eth_sig_utils/__init__.py", line 3, in <module>
    from . import (  # NOQA
  File "/home/fab/abradsha/.local/lib/python3.12/site-packages/py_eth_sig_utils/signing.py", line 3, in <module>
    from .eip712 import encode_typed_data
  File "/home/fab/abradsha/.local/lib/python3.12/site-packages/py_eth_sig_utils/eip712/__init__.py", line 3, in <module>
    from .encoding import (  # NOQA
  File "/home/fab/abradsha/.local/lib/python3.12/site-packages/py_eth_sig_utils/eip712/encoding.py", line 2, in <module>
    from eth_abi import encode_single, encode_abi
ImportError: cannot import name 'encode_single' from 'eth_abi' (/home/fab/abradsha/.local/lib/python3.12/site-packages/eth_abi/__init__.py)

[abradshaw]

My OS is Fedora, however I have also just installed an Ubuntu machine to test with - same error

Probably related to ethereum/web3.py#2621

[abradshaw]

I did some work getting this to run natively (no appimage) in a modern Linux system (Fedora 39).

To start with you will need python 3.11 (and Fedora39 ships with 3.12, so you will need to do this all from a venv

Before you start, ensure you have the python development package installed

sudo dnf install python3.11 python3.11-devel
python3.11 -m venv venv-3.11
source venv-3.11/bin/activate

From within this venv you need to pull in all the requirements. (note: the documentation is wrong here until this MR is merged #4)

(venv-3.11) username@laptop:~/git/Satochip-Bridge$ python3 -m pip install -r contrib/requirements/requirements.txt

If you get any messages like Failed building wheel for pyscard then pip install wheel

Once the requirements are done, you still have 2 things to do

1. you need to downgrade the pip package for eth_abi or you will get errors about encode_single. Weirdly you need to use the upgrade syntax to downgrade from 5.0.0 to 3.0.0

(venv-3.11) username@laptop:~/git/Satochip-Bridge$ pip3 install --upgrade eth_abi==3.0.0 

2. you will now only get one error - cannot import name 'getargspec' see Python 3.11 ImportError: cannot import name 'getargspec' from 'inspect' ethereum/web3.py#2704

First, from within your 3.11 venv, make sure you have the pip module parsimonious

(venv-3.11) username@laptop:~/git/Satochip-Bridge$ pip3 install parsimonious

Finally you will need to edit a file in your site-packages dir ....

(venv-3.11) user@-laptop:~/git/Satochip-Bridge$ nvim ./venv-3.11/lib64/python3.11/site-packages/parsimonious/expressions.py

Change the import line from getargspec to getfullargspec (I commented the old line and added a new one)

from inspect import getfullargspec
# from inspect import getargspec

Now everything should work

PS: I still get smartcard.Exceptions.CardConnectionException: Unable to connect with protocol: T0 or T1. Card is unpowered. when I remove a card, the same as in the .appimage

[abradshaw]

As I mentioned in my previous comment I was getting

Traceback (most recent call last):
  File "/home/fab/abradsha/Nextcloud/Copy/git/Satochip-Bridge/venv-3.11/lib64/python3.11/site-packages/smartcard/CardMonitoring.py", line 179, in run
    self.observable.notifyObservers(
  File "/home/fab/abradsha/Nextcloud/Copy/git/Satochip-Bridge/venv-3.11/lib64/python3.11/site-packages/smartcard/Observer.py", line 62, in notifyObservers
    observer.update(self, arg)
  File "/home/fab/abradsha/Nextcloud/Copy/git/Satochip-Bridge/venv-3.11/lib64/python3.11/site-packages/pysatochip/CardConnector.py", line 99, in update
    self.cc.cardservice.connection.connect()
  File "/home/fab/abradsha/Nextcloud/Copy/git/Satochip-Bridge/venv-3.11/lib64/python3.11/site-packages/smartcard/CardConnectionDecorator.py", line 54, in connect
    self.component.connect(protocol, mode, disposition)
  File "/home/fab/abradsha/Nextcloud/Copy/git/Satochip-Bridge/venv-3.11/lib64/python3.11/site-packages/smartcard/pcsc/PCSCCardConnection.py", line 123, in connect
    raise CardConnectionException(
smartcard.Exceptions.CardConnectionException: Unable to connect with protocol: T0 or T1. Card protocol mismatch.

When removing the card or when connecting the reader without the card entered. I also get this same message now I have the packages installed locally in my Fedora 39

On a hunch I tried to recreate the issue using a different reader - a Identiv SCR 3310 v2.0 - SCM USB SmartCard Reader - this works Perfectly

So in summary, the reader that SatoChip ship seems to have an issue when removing/re-inserting the card when running on a Linux OS - changing the reader to a SCR 3310 solves the issue and cards can be removed and re-inserted again and again with now Tracebacks.

So it looks like an issue with the current Linux driver for SatoChip Reader (Alcor Micro Corp. AU9540 Smartcard Reader)

I would be happy to close this ticket as it seems to be an upstream issue

[Toporin]

Thanks for the detailed feedback!
Note that w are reorganizing our tools and we may restructure Satochip-Bridge in the near future.
Satochip has been integrated natively in Uniblow (https://uniblow.org/) which provides similar functionalities (web3 connection with WalletConnect support) and supports more blockchains (Eth, Doge, Tezos, ...).
So we may release a version of Satochip-Bridge that focus on the card management (seed import/reset, enable/disable 2FA, reset factory...)