[1.18.2] How to create an item that can store and restore entity?

[jissee]

i want to create an item that can store an entity if i press shift and right-click the entity and then restore the entity in the world. i thought the entity can be converted to (or maybe serialize) compound tag by Entity#save and be stored in ItemStack. here are my codes and some methods that i tried: https://pastebin.com/3N0sRNTu  the EntityType has been registered correctly and it can be created using SpawnEgg.

[warjort]

From what I can tell, you are trying to save the entity into the itemstack on the client.

Look at how the creeper interacts with flint and steel in Creeper.mobInteract() for an example how to do sided processing properly.

Note the use of sidedSuccess and level.isClientSide. 

Edited August 20, 2022 by warjort