Reducer.kt with StateFlowAdaptable

Reducer.kt

interface StateFlowAdaptable {
    val stateFlowAdapter: FlowAdapter<*>
    val errorFlowAdapter: FlowAdapter<*>
}

interface UiState

interface UiEvent

abstract class Reducer<S : UiState, E : UiEvent>(initialVal: S) : ViewModel(), StateFlowAdaptable {
    //...
    private val _state: MutableStateFlow<S> = MutableStateFlow(initialVal)
    val state: StateFlow<S>
        get() = _state

    private val _error: MutableStateFlow<String?> = MutableStateFlow(null)
    val error: StateFlow<String?>
        get() = _error

    override val stateFlowAdapter = state.asCallbacks()
    override val errorFlowAdapter = error.asCallbacks()

    private fun <T : Any?> StateFlow<T>.asCallbacks() = FlowAdapter(viewModelScope, this)
    //...
}