PaperMC/paper-server/nms-patches/net/minecraft/world/entity/projectile/EntityEnderPearl.patch

--- a/net/minecraft/world/entity/projectile/EntityEnderPearl.java
+++ b/net/minecraft/world/entity/projectile/EntityEnderPearl.java
@@ -21,6 +21,13 @@
 import net.minecraft.world.phys.MovingObjectPositionEntity;
 import net.minecraft.world.phys.Vec3D;
 
+// CraftBukkit start
+import net.minecraft.world.level.dimension.WorldDimension;
+import org.bukkit.event.entity.CreatureSpawnEvent;
+import org.bukkit.event.entity.EntityRemoveEvent;
+import org.bukkit.event.player.PlayerTeleportEvent;
+// CraftBukkit end
+
 public class EntityEnderPearl extends EntityProjectileThrowable {
 
     public EntityEnderPearl(EntityTypes<? extends EntityEnderPearl> entitytypes, World world) {
@@ -65,19 +72,26 @@
                         EntityPlayer entityplayer = (EntityPlayer) entity;
 
                         if (entityplayer.connection.isAcceptingMessages()) {
+                            // CraftBukkit start
+                            Entity tp = entity.changeDimension(new DimensionTransition(worldserver, this.position(), entity.getDeltaMovement(), entity.getYRot(), entity.getXRot(), DimensionTransition.DO_NOTHING, PlayerTeleportEvent.TeleportCause.ENDER_PEARL));
+                            if (tp == null) {
+                                this.discard(EntityRemoveEvent.Cause.HIT);
+                                return;
+                            }
+                            // CraftBukkit end
                             if (this.random.nextFloat() < 0.05F && worldserver.getGameRules().getBoolean(GameRules.RULE_DOMOBSPAWNING)) {
                                 EntityEndermite entityendermite = (EntityEndermite) EntityTypes.ENDERMITE.create(worldserver);
 
                                 if (entityendermite != null) {
                                     entityendermite.moveTo(entity.getX(), entity.getY(), entity.getZ(), entity.getYRot(), entity.getXRot());
-                                    worldserver.addFreshEntity(entityendermite);
+                                    worldserver.addFreshEntity(entityendermite, CreatureSpawnEvent.SpawnReason.ENDER_PEARL);
                                 }
                             }
 
-                            entity.changeDimension(new DimensionTransition(worldserver, this.position(), entity.getDeltaMovement(), entity.getYRot(), entity.getXRot(), DimensionTransition.DO_NOTHING));
+                            // entity.changeDimension(new DimensionTransition(worldserver, this.position(), entity.getDeltaMovement(), entity.getYRot(), entity.getXRot(), DimensionTransition.DO_NOTHING)); // CraftBukkit - moved up
                             entity.resetFallDistance();
                             entityplayer.resetCurrentImpulseContext();
-                            entity.hurt(this.damageSources().fall(), 5.0F);
+                            entity.hurt(this.damageSources().fall().customEntityDamager(this), 5.0F); // CraftBukkit
                             this.playSound(worldserver, this.position());
                         }
                     } else {
@@ -86,11 +100,11 @@
                         this.playSound(worldserver, this.position());
                     }
 
-                    this.discard();
+                    this.discard(EntityRemoveEvent.Cause.HIT); // CraftBukkit - add Bukkit remove cause
                     return;
                 }
 
-                this.discard();
+                this.discard(EntityRemoveEvent.Cause.HIT); // CraftBukkit - add Bukkit remove cause
                 return;
             }
         }
@@ -116,7 +130,7 @@
         Entity entity = this.getOwner();
 
         if (entity instanceof EntityPlayer && !entity.isAlive() && this.level().getGameRules().getBoolean(GameRules.RULE_ENDER_PEARLS_VANISH_ON_DEATH)) {
-            this.discard();
+            this.discard(EntityRemoveEvent.Cause.DESPAWN); // CraftBukkit - add Bukkit remove cause
         } else {
             super.tick();
         }
@@ -129,7 +143,7 @@
 
     @Override
     public boolean canChangeDimensions(World world, World world1) {
-        if (world.dimension() == World.END) {
+        if (world.getTypeKey() == WorldDimension.END) { // CraftBukkit
             Entity entity = this.getOwner();
 
             if (entity instanceof EntityPlayer) {