trezor-firmware/src/apps/management/wipe_device.py

from trezor import ui
from trezor.messages import ButtonRequestType
from trezor.messages.Success import Success
from trezor.ui.text import Text

from apps.common import storage
from apps.common.confirm import require_hold_to_confirm


async def wipe_device(ctx, msg):

    text = Text('Wipe device', ui.ICON_WIPE, icon_color=ui.RED)
    text.normal('Do you really want to', 'wipe the device?', '')
    text.bold('All data will be lost.')

    await require_hold_to_confirm(ctx, text,
        code=ButtonRequestType.WipeDevice,
        button_style=ui.BTN_CANCEL,
        loader_style=ui.LDR_DANGER)

    storage.wipe()

    return Success(message='Device wiped')