Solved Detect if a player have been hit by a snowball

I am creating a plugin where it needs to detect if a player is hit by a special snowball. (which is done with namedtag stuff) How would I define the snowball that was thrown to the player?

PHP:

        public function onDamage(EntityDamageEvent $event){
        $player = $event->getEntity();
        $snowball = // ???
        if($event->getCause() === EntityDamageEvent::CAUSE_PROJECTILE && /* What would go in here too?*/){
                $event->setDamage(10);
                $player->sendMessage("You have been hit by a bullet from other player.");
        }

    }

$snowball = $event->getDamager()
* && $snowball instanceof Snowball
!! Just an idea, haven't checked it yet.

Use if($event instanceof EntityDamageByEntityEvent), then if $event->getDamager() instanceof Snowball

Ty! I will try that out soon! So the projectile I was hit by can be defined with getDamager! I thought this meant something like getEntity... XD

It returns an Entity instance

Yup, I re-read the docs. I meant that I misunderstood that it will return the attacker, not the projectile entity.

EntityDamageByChildEntityEvent::getChild()

PHP:

if($cause == EntityDamageEvent::CAUSE_PROJECTILE){
                if($event instanceof EntityDamageByChildEntityEvent){
                    $killer = $event->getDamager();
$snowball = $event->getChild();
                    if($snowball instanceof Snowball){
//your stuff
                    }
                }

Thanks to @PEMapModder to remind me about getChild()