def _new_device_id() -> str:
from trezorcrypto import random # avoid pulling in trezor.crypto
return hexlify(random.bytes(12)).decode().upper()
def export_session_id(self) -> bytes:
# generate a new session id if we don't have it yet
if not self.session_id:
self.session_id[:] = random.bytes(_SESSION_ID_LENGTH)
# export it as immutable bytes
return bytes(self.session_id)