[1.16.5] Help with custom Network Message / move items in a container

[Luis_ST]

I am currently working on a mod that enables the game mode Bedwars.
now i want to improve my villager shop system,
which currently consists of several villagers (with custom trades).
I would now like to put this in one villager.

for this I have created a custom container which should act as a shop.
Items are placed in this container when it is opened.
and the player can then switch back and forth in various tabs by clicking on items.

And this is exactly where the problem is, I know that if I move items in a container,
I have to synchronize them with the server. I do this with a SimpleChannel and a custom message.
when I test the whole thing it doesn't work / it is like before without the synchronization,
the items are not placed correctly in the slots because when I click into the inventory it resets to the default

this is the container class
this the message class
and this a helper class which i use to set the items in the inventory

so what's wrong? - thanks for replies

[Luis_ST]

1 hour ago, diesieben07 said:

Containers already take care of synchronizing the inventory, there is no need to do it manually

ah okay i found the method that does it for me
thanks