trezor-firmware/core/src/apps/management/set_u2f_counter.py

import storage.device
from trezor import ui, wire
from trezor.messages import ButtonRequestType
from trezor.messages.SetU2FCounter import SetU2FCounter
from trezor.messages.Success import Success
from trezor.ui.components.tt.text import Text

from apps.common.confirm import require_confirm


async def set_u2f_counter(ctx: wire.Context, msg: SetU2FCounter) -> Success:
    if not storage.device.is_initialized():
        raise wire.NotInitialized("Device is not initialized")
    if msg.u2f_counter is None:
        raise wire.ProcessError("No value provided")

    text = Text("Set U2F counter", ui.ICON_CONFIG)
    text.normal("Do you really want to", "set the U2F counter")
    text.bold("to %d?" % msg.u2f_counter)
    await require_confirm(ctx, text, code=ButtonRequestType.ProtectCall)

    storage.device.set_u2f_counter(msg.u2f_counter)

    return Success(message="U2F counter set")