PaperMC/paper-server/patches/sources/net/minecraft/world/item/EggItem.java.patch

--- a/net/minecraft/world/item/EggItem.java
+++ b/net/minecraft/world/item/EggItem.java
@@ -25,13 +25,32 @@
     public InteractionResult use(Level world, Player user, InteractionHand hand) {
         ItemStack itemstack = user.getItemInHand(hand);
 
-        world.playSound((Player) null, user.getX(), user.getY(), user.getZ(), SoundEvents.EGG_THROW, SoundSource.PLAYERS, 0.5F, 0.4F / (world.getRandom().nextFloat() * 0.4F + 0.8F));
+        // world.playSound((EntityHuman) null, entityhuman.getX(), entityhuman.getY(), entityhuman.getZ(), SoundEffects.EGG_THROW, SoundCategory.PLAYERS, 0.5F, 0.4F / (world.getRandom().nextFloat() * 0.4F + 0.8F)); // CraftBukkit - moved down
         if (world instanceof ServerLevel worldserver) {
-            Projectile.spawnProjectileFromRotation(ThrownEgg::new, worldserver, itemstack, user, 0.0F, EggItem.PROJECTILE_SHOOT_POWER, 1.0F);
-        }
+            // CraftBukkit start
+            // Paper start - PlayerLaunchProjectileEvent
+            final Projectile.Delayed<ThrownEgg> thrownEgg = Projectile.spawnProjectileFromRotationDelayed(ThrownEgg::new, worldserver, itemstack, user, 0.0F, EggItem.PROJECTILE_SHOOT_POWER, 1.0F);
+            com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent event = new com.destroystokyo.paper.event.player.PlayerLaunchProjectileEvent((org.bukkit.entity.Player) user.getBukkitEntity(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), (org.bukkit.entity.Projectile) thrownEgg.projectile().getBukkitEntity());
+            if (event.callEvent() && thrownEgg.attemptSpawn()) {
+                if (event.shouldConsume()) {
+                    itemstack.consume(1, user);
+                } else if (user instanceof net.minecraft.server.level.ServerPlayer) {
+                    ((net.minecraft.server.level.ServerPlayer) user).getBukkitEntity().updateInventory();
+                }
 
-        user.awardStat(Stats.ITEM_USED.get(this));
-        itemstack.consume(1, user);
+                world.playSound((Player) null, user.getX(), user.getY(), user.getZ(), SoundEvents.EGG_THROW, SoundSource.PLAYERS, 0.5F, 0.4F / (world.getRandom().nextFloat() * 0.4F + 0.8F));
+                user.awardStat(Stats.ITEM_USED.get(this));
+            } else {
+                // Paper end - PlayerLaunchProjectileEvent
+                if (user instanceof net.minecraft.server.level.ServerPlayer) {
+                    ((net.minecraft.server.level.ServerPlayer) user).getBukkitEntity().updateInventory();
+                }
+                return InteractionResult.FAIL;
+            }
+            // CraftBukkit end
+        }
+        world.playSound((Player) null, user.getX(), user.getY(), user.getZ(), SoundEvents.EGG_THROW, SoundSource.PLAYERS, 0.5F, 0.4F / (world.getRandom().nextFloat() * 0.4F + 0.8F));
+        // Paper - PlayerLaunchProjectileEvent - moved up
         return InteractionResult.SUCCESS;
     }