Flutter: navegue a una nueva pantalla y borre todas las pantallas anteriores

solía Navigator.push hasta 6 pantallas para llegar a la página de pago. Después del pago, quiero ir a la página “Pago exitoso” y luego eliminar todas las pantallas anteriores, es decir, usar el botón Atrás volverá a la primera pantalla.

NOTA: he probado pushReplacementNamed y no funciona

Me lo imaginé. Era el Navigator.pushAndRemoveUntil función. Donde tuve que pasar el PaymentSuccessful widget como el newRoutey el "/Home" ruta como el predicado

  _navPaymentSuccessful(){
    Navigator.pushAndRemoveUntil(
      context, 
      MaterialPageRoute(
        builder: (context) => PaymentSuccessful()
      ), 
     ModalRoute.withName("/Home")
    );
  }

Accepted Answer is correct. But you can try this too.

Navigator.pushAndRemoveUntil<dynamic>(
        context,
        MaterialPageRoute<dynamic>(
          builder: (BuildContext context) => YourPageNameGoesHere(),
        ),
        (route) => false,//if you want to disable back feature set to false
);

even simpler and I think a better way would be to do it this way,
this Schedules a callback for the end of the current persistent frame,to push to route /loginPage and removes all the previous routes,this way you can make sure that all the frames are rendered and then you navigate to next page.

 SchedulerBinding.instance.addPostFrameCallback((_) {
                Navigator.of(context).pushNamedAndRemoveUntil(
                    '/loginPage', (Route<dynamic> route) => false);
              });

I would Suggest use WillPopScope in your Payment successful page and onWillPop method write following snippet of code:

 return WillPopScope(
      onWillPop: (){
        Navigator.of(context)
            .pushNamedAndRemoveUntil('/Home', (Route<dynamic> route) => false);
      },
      child: Scaffold()
};