Solved Prevent NPC from despawning

Alright, so I'm working on an npc based plugin for my server hub, but whenever I use the entity for transferring servers, it despawns. EDIT: After transferring to another server, and trying to spawn any entity, the entity remains invisible. Here's my code:

PHP:

public function attack(EntityDamageEvent $source){
        if($source instanceof EntityDamageByEntityEvent){
            $damager = $source->getDamager();
            if($damager instanceof Player){
                $pk = new TransferPacket();
                $pk->address = "this.is.fake";
                $pk->port = 19132;
                $damager->directDataPacket($pk);
            }
        }

public function spawnTo(Player $player){
    if(CoreLoader::getInstance()->hasSpawned === false){
        CoreLoader::getInstance()->hasSpawned = true;
        $pk = new AddPlayerPacket();
        $pk->username = "";
        $pk->uuid = $this->getUniqueId();
        $pk->item = Item::get(Item::BOW);
        $pk->pitch = $this->pitch;
        $pk->yaw = $this->yaw;
        $pk->x = $player->getX();
        $pk->y = $player->getY();
        $pk->z = $player->getZ();
        $pk->speedX = 0;
        $pk->speedY = 0;
        $pk->speedZ = 0;
        $pk->entityRuntimeId = $this->getId();
        $pk->metadata = $this->dataProperties;

        $player->dataPacket($pk);

        $player->server->updatePlayerListData($this->getUniqueId(), $this->getId(), "OITQ", $this->skinId, $this->skin, [$player]);
    }
}
    }

 

try debugging

 

Is it invisible on the server before transferring or on the new server after?

 

use PlayerListPacket();

 

After the player transfers, it won't show up until I restart the server

 

Probably it doesn't despawn, it simply die. You must cancel the event EntityDamageEvent or the NPC will get damage.
Also, you must check if the entity being hurt is a NPC, if not, when you hit any entity you'll be transferred, even if it's a chicken, a common player... any kind of entity.

I have all my NPCs implementig a interface called Statue to do this. Example:

PHP:

public function onEntityDamage(EntityDamageEvent $event) {
        $entity = $event->getEntity();
        if($entity instanceof Statue) {
            $event->setCancelled();
            if(!$event instanceof EntityDamageByEntityEvent) {
                return;
            }
            $damager = $event->getDamager();
            if(!$damager instanceof Player) {
                return;
            }
            // Here you can transfer the player
        }
}

 

Well, If something doesn't work and I don't know how to fix it, I would rather remove it than have a corrupt server

 

Well um, it's been quite a while since I opened this, and it works fine now, just made some mistakes, sorry y'all...