ClockViewModel.kt

class ClockViewModel @Inject constructor(
    observeState: ObserveState,
    private val nextState: NextState,
    private val errorChannel: BroadcastChannel<Throwable>,
    private val defaultDispatcher: CoroutineDispatcher
) : ViewModel() {

    val viewState: LiveData<ClockViewState> = observeState()
        .map { it.toViewState() }
        .flowOn(defaultDispatcher)
        .catch { errorChannel.send(it) }
        .asLiveData(viewModelScope.coroutineContext)
}