Walletwasabi: Coldcard - Error: Could not open client or get fingerprint information: open failed

Created on 2 Oct 2020  路  2Comments  路  Source: zkSNACKs/WalletWasabi

General Description

Trying to connect to a ColdCard mk3 hardware wallet, after "Search Hardware Wallets," it shows "Coldcard - Error: Could not open client or get fingerprint information: open failed." The ColdCard is unlocked. I've tried connecting & unlocking the ColdCard prior to launching Wasabi, as well as launching Wasabi then connecting & unocking ColdCard. Always the same issue.

How To Reproduce?

  1. Connect a ColdCard mk3 to USB
  2. Enter pin to unlock ColdCard
  3. Launch Wasabi->Wallet Manager->Hardware Wallet->Search Hardware wallets
  4. Observe error message: "Coldcard - Error: Could not open client or get fingerprint information: open failed."

Operating System

Kubuntu 20.04

Wasabi Version

1.1.12.0

debug
Source
picture metal450

All 2 comments

@soosr it is the same error that appeared to me

RiccardoMasutti picture RiccardoMasutti on 2 Oct 2020
👍1

Solved. You have to add these udev rules: https://github.com/Coldcard/ckcc-protocol/blob/master/51-coinkite.rules

And possibly (not sure if this was necessary, I did both):
sudo apt-get install libusb-1.0-0-dev libudev-dev
python3 -m pip install ckcc-protocol

(from https://electrum.readthedocs.io/en/latest/hardware-linux.html)

metal450 picture metal450 on 2 Oct 2020
👍1
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