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trezor-firmware/core/src/boot.py

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# isort:skip_file
import trezorui2
# Showing welcome screen as soon as possible
# (display is also prepared on that occasion).
# Remembering time to control how long we show it.
trezorui2.draw_welcome_screen()
import storage
import storage.device
from trezor import config, log, loop, ui, utils, wire
from trezor.pin import (
allow_all_loader_messages,
ignore_nonpin_loader_messages,
show_pin_timeout,
)
from trezor.ui.layouts.homescreen import Lockscreen
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from apps.common.request_pin import can_lock_device, verify_user_pin
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async def bootscreen() -> None:
"""Sequence of actions to be done on boot (after device is connected).
We are starting with welcome_screen on the screen and want to show it
for at least _WELCOME_SCREEN_MS before any other screen.
Any non-PIN loaders are ignored during this function.
Allowing all of them before returning.
"""
lockscreen = Lockscreen(label=storage.device.get_label(), bootscreen=True)
ui.display.orientation(storage.device.get_rotation())
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while True:
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try:
if can_lock_device():
await lockscreen
await verify_user_pin()
storage.init_unlocked()
allow_all_loader_messages()
return
except wire.PinCancelled:
# verify_user_pin will convert a SdCardUnavailable (in case of sd salt)
# to PinCancelled exception.
# Ignore exception, retry loop.
pass
except BaseException as e:
# other exceptions here are unexpected and should halt the device
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if __debug__:
log.exception(__name__, e)
utils.halt(e.__class__.__name__)
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# Ignoring all non-PIN messages in the boot-phase (turned off in `bootscreen()`).
ignore_nonpin_loader_messages()
config.init(show_pin_timeout)
if __debug__ and not utils.EMULATOR:
config.wipe()
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loop.schedule(bootscreen())
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loop.run()