-impl MaybeReadableArgs<u64> for UserOnionMessageContents {
- fn read<R: std::io::Read>(_r: &mut R, _args: u64) -> Result<Option<Self>, DecodeError> {
- // UserOnionMessageContents is only ever passed to `send_onion_message`, never to an
- // `OnionMessageHandler`, thus it does not need to implement the read side here.
- unreachable!();
- }
-}