Bitbox02 sign_message fails

[andreasgriffin]

Doing

client.sign_message('test message', 'm/84h/1h/0h/0/0')

gives the error:

hwilib.devices.bitbox02_lib.communication.bitbox_api_protocol.Bitbox02Exception: error code: 101, message: invalid input

Doing exactly the same with Coldcard or Ledger works.
Tagging @achow101

Versions:
Bitbox02 Firmware: 9.22.0
HWI: 3.1.0

[achow101]

cc @benma

[benma]

@andreasgriffin have you instantiated the client with chain=Chain.TEST? BitBox only signs using the testnet keypath when testnet is set.

[andreasgriffin]

Yes I initialize the client with the correct chain.

Client initialized with Chain.MAIN, and then

client.sign_message('test message', 'm/84h/0h/0h/0/0')

works.

Client initialized with Chain.TESTNET (or signet or regtest)

client.sign_message('test message', 'm/84h/1h/0h/0/0')

fails.

[benma]

@andreasgriffin my bad, I forgot: the BitBox does not even support signing messages in testnet (not sure why not, maybe it was due to some worry about mainnet and testnet having the same message format, but that can be mitigated by keypath checks).

If this is an impotant feature for you, we should open an issue at https://github.com/BitBoxSwiss/bitbox02-firmware/issues. It's not a HWI issue in any case, so you can close this issue here.