how can I get last damager

Hey I was doing this custom death thingie, I want the player who killed a player to be sent a message 'You killed {player} + 5 coins' and then with economy be sent 5$ I think Iv'e almost got it but I'm getting a bit stuck :/ here is the console error:

Code:

[16:24:33] [Server thread/CRITICAL]: "Could not pass event 'pocketmine\event\entity\EntityDamageByEntityEvent' to 'DeathView v0.0.2': Call to a member function sendMessage() on boolean on TheDiamondYT\DeathView\Loader
[16:24:33] [Server thread/CRITICAL]: Error: "Call to a member function sendMessage() on boolean" (EXCEPTION) in "/plugins/DeathView-master/src/TheDiamondYT/DeathView/Loader" at line 67

here is the code:

PHP:

    public function onEntityDamage(EntityDamageEvent $ev) {
        if($ev->isCancelled()) {
            return;
        } 
        $entity = $ev->getEntity();
      
        if($entity instanceof Player and $entity->getHealth() - $ev->getDamage() <= 0) {
            if($entity->getGamemode() === Player::SPECTATOR){
                return;
            }
            $ev->setCancelled(true);
            $entity->setGamemode(Player::SPECTATOR);
            $this->getServer()->getScheduler()->scheduleDelayedTask(new SpectateTask($this, $entity), $this->config["time"] * 20);
            $entity->addTitle("§c§lYOU DIED!!§r", "§fRespawning..", 15, 15, 15);
            $level = $entity->getLevel();
            $x = $entity->getX();
            $y = $entity->getY();
            $z = $entity->getZ();
            $pos1 = new Vector3($x, $y, $z);
            $pos = new Vector3($x, $y + 2, $z);
            $level->addSound(new AnvilFallSound($pos1));
            $level->addParticle(new HeartParticle($pos));
            $killer  = $entity->getLastDamageCause()->getDamager instanceof EntityDamageByEntityEvent;
            $killer->sendMessage("You killed " . $entity->getNameTag() . " + 5 coins") instanceof EntityDamageByEntityEvent;
            $money = $this->getServer()->getPluginManager()->getPlugin("EconomyAPI")->addMoney(5)->$player->getName());
            return;
            }

(line 67 is:

PHP:

$killer->sendMessage("You killed " . $entity->getNameTag() . " + 5 coins") instanceof EntityDamageByEntityEvent;

) could anyone help me with this? thanks

 

The error mentions you try to call sendMessage on a boolean, which is exactly the case.
You assign:

PHP:

$killer  = $entity->getLastDamageCause()->getDamager instanceof EntityDamageByEntityEvent

So the killer is: Last damage cause instanceof EntityDamageByEntityEvent? Which there is only a boolean to answer. You could do the following to fix this:

PHP:

if($ev instanceof EntityDamageByEntityEvent) {
  $killer = $ev->getDamager();
} else {
  return;
}


That way you assign $killer correctly, and have the check if it is an EntityDamageByEntityEvent.

 

PHP:

  public function onEntityDamage(EntityDamageEvent $ev) {
        if($ev->isCancelled()) {
            return;
        } 
        $entity = $ev->getEntity();
      
        if($entity instanceof Player and $entity->getHealth() - $ev->getDamage() <= 0) {
            if($entity->getGamemode() === Player::SPECTATOR){
                return;
            }
             if ($ev instanceof \pocketmine\event\entity\EntityDamageByEntityEvent) {
            $ev->setCancelled(true);
            $entity->setGamemode(Player::SPECTATOR);
            $this->getServer()->getScheduler()->scheduleDelayedTask(new SpectateTask($this, $entity), $this->config["time"] * 20);
            $entity->addTitle("§c§lYOU DIED!!§r", "§fRespawning..", 15, 15, 15);
            $level = $entity->getLevel();
            $x = $entity->getX();
            $y = $entity->getY();
            $z = $entity->getZ();
            $pos1 = new Vector3($x, $y, $z);
            $pos = new Vector3($x, $y + 2, $z);
            $level->addSound(new AnvilFallSound($pos1));
            $level->addParticle(new HeartParticle($pos));
            $killer  = $ev->getDamager();
            $killer->sendMessage("You killed " . $entity->getName() ." + 5 coins")
            $money = $this->getServer()->getPluginManager()->getPlugin("EconomyAPI")->addMoney(5, $entity);
            }