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python: use better error when no ui is supplied

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This commit is contained in:
matejcik 2019-05-13 15:43:43 +02:00
parent 00564f4a1c
commit 6fabaa7bd8
1 changed files with 26 additions and 3 deletions
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29
python/trezorlib/client.py
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@ -16,6 +16,7 @@
import logging
import sys
from types import SimpleNamespace
import warnings
from mnemonic import Mnemonic
@ -43,6 +44,21 @@ Or visit https://wallet.trezor.io/
""".strip()
def _no_ui_selected(*args, **kwargs):
raise RuntimeError(
"You did not supply a UI object. You were warned that this would crash soon. "
"That's what happened now.\n "
"You need to supply a UI object to TrezorClient constructor."
)
_NO_UI_OBJECT = SimpleNamespace(
button_request=_no_ui_selected,
get_passphrase=_no_ui_selected,
get_pin=_no_ui_selected,
)
def get_buttonrequest_value(code):
# Converts integer code to its string representation of ButtonRequestType
return [
@ -91,14 +107,21 @@ class TrezorClient:
the user might not need to enter their passphrase again.
"""
def __init__(self, transport, ui=None, state=None):
def __init__(self, transport, ui=_NO_UI_OBJECT, state=None):
LOG.info("creating client instance for device: {}".format(transport.get_path()))
self.transport = transport
self.ui = ui
self.state = state
if ui is None:
warnings.warn("UI class not supplied. This will probably crash soon.")
# XXX remove when old Electrum has been cycled out.
# explanation: We changed the API in 0.11 and this broke older versions
# of Electrum (incl. all its forks). We want to display an intelligent error
# message instead of crashing for no reason (see DEPRECATION_ERROR and MovedTo),
# so we are not allowed to crash in constructor.
# I'd keep this until, say, end of 2019 (or version 0.12), and then drop
# the default value for `ui` argument and all related functionality.
if ui is _NO_UI_OBJECT:
warnings.warn("UI object not supplied. This will probably crash soon.")
self.session_counter = 0
self.init_device()