trezor-firmware/core/src/apps/monero/get_watch_only.py

from typing import TYPE_CHECKING

from trezor.messages import MoneroWatchKey

from apps.common import paths
from apps.common.keychain import auto_keychain
from apps.monero import layout, misc
from apps.monero.xmr import crypto_helpers

if TYPE_CHECKING:
    from trezor.wire import Context
    from trezor.messages import MoneroGetWatchKey

    from apps.common.keychain import Keychain


@auto_keychain(__name__)
async def get_watch_only(
    ctx: Context, msg: MoneroGetWatchKey, keychain: Keychain
) -> MoneroWatchKey:
    await paths.validate_path(ctx, keychain, msg.address_n)

    await layout.require_confirm_watchkey(ctx)

    creds = misc.get_creds(keychain, msg.address_n, msg.network_type)
    address = creds.address
    watch_key = crypto_helpers.encodeint(creds.view_key_private)

    return MoneroWatchKey(watch_key=watch_key, address=address.encode())