Paper/patches/server/1020-Update-entity-data-when-attaching-firework-to-entity.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: booky10 <boooky10@gmail.com>
Date: Sun, 27 Aug 2023 16:11:31 +0200
Subject: [PATCH] Update entity data when attaching firework to entity

== AT ==
public net.minecraft.world.entity.projectile.FireworkRocketEntity DATA_ATTACHED_TO_TARGET

diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
index 13b09465952dca2e95647ddb9753a7fe2db51720..c13cdbaf7abdf120a3969f8e887b4c3b78989c9c 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
@@ -69,6 +69,10 @@ public class CraftFirework extends CraftProjectile implements Firework {
         }
 
         this.getHandle().attachedToEntity = (entity != null) ? ((CraftLivingEntity) entity).getHandle() : null;
+        // Paper start - update entity data
+        this.getHandle().getEntityData().set(FireworkRocketEntity.DATA_ATTACHED_TO_TARGET,
+            entity != null ? java.util.OptionalInt.of(entity.getEntityId()) : java.util.OptionalInt.empty());
+        // Paper end
         return true;
     }