Problem

Before migrating to Navigation 3, I used a single Route type with the following deeplink redirect logic:

Navigation 2 - Route.ValidatePin:

PinScreen(
    onNext = {
        val destination = deeplinkViewModel.getAndConsumeDestination()
        if (destination != null) {
            // when navigate from deeplink add Home graph as starting destination
            navController.migrateAuthGraphTo(graph = Graph.Home)
            navController.navigate(route = destination) {
                launchSingleTop = true
            }
        } else {
            navController.migrateAuthGraphTo(graph = Graph.Home)
        }
    })

I'm trying to figure out how to handle this redirect properly in Navigation 3 — especially the equivalent of navController.navigate(route = destination).

destination is the target deeplink Route returned from my view model. I can also change it so it returns the Graph that owns that Route, if that makes the Navigation 3 setup easier.

The problem is that the destination I'm redirecting to can belong to different graphs, each with its own rememberNavBackStack().

Is there a simple way to navigate to cross-graph Routes from a single place?

Project architecture

This is my project setup:

• a @Serializable data class/object for every navigation entry
• separate sealed interfaces for Route and Graph

AuthGraph implementation:

@Composable
fun AuthNavigation(
    modifier: Modifier = Modifier,
    deeplinkViewModel: DeeplinkViewModel,
    goToHome: () -> Unit,
) {
    val authBackStack = rememberNavBackStack(Route.ScreensSetup)
    NavDisplay(
        backStack = authBackStack,
        entryProvider = entryProvider {
            entry<Route.ValidatePin> {
                PinScreen(
                    onNext = {
                        // same as in the code example above
                    },
                )
            }
        },
    )
}

NavHost implementation:

@Composable
fun MKsiadzNavHost(){
    val rootBackStack = rememberNavBackStack()
    NavDisplay(
        backStack = rootBackStack,
        onBack = { rootBackStack.removeLastOrNull() },
        entryDecorators = listOf(
            rememberSaveableStateHolderNavEntryDecorator(),
            rememberViewModelStoreNavEntryDecorator()
        ),
        entryProvider = entryProvider {
            entry<Graph.Auth> {
                AuthNavigation(deeplinkViewModel =... , goToHome =...) { }
            }
            entry<Graph.Home> {
                HomeNavigation(goToForms = {}, goToAnnouncement = {})
            })}