Rust Blueprint blocker

The ability to set some items as unresearchable (cannot create blueprints of them)
So the item would only be able to be found in loot and not ever learned and crafted.

Other Blueprint plugins I found:

Blueprint Manager for Rust | Oxide
(Doesnt Block, can just unlock?)

BlueprintBlocker for Rust | Oxide
(Outdated?)

 

Oxide API for Rust

object OnItemResearch(Item item, BasePlayer player) {}

• Called right before a player begins to research an item
• Returning a non-null value overrides default behavior

 

I would like to have a plugin thats disable the crafting of the Blueprints in the Workbench, but allow to research it.
Is it possible to get this done?

Some Guy gave me a code that works like this, but the problem is that the player get the blueprint directly then and this shouldn´t happen.
The player should only be able to craft the BP on the Researchtable.

Do you can take a look on this maybe? Or maybe Wulf himself?

Please.

What have to be modified to get this done?

MfG Bi0