Minecraft Script Generated by ScripterAI

"Create an item that if held with the main hand, if you press shift an inventory gui is activated in which there are two slots. In these slots it is possible to drag only diamonds, stackable in 64."

/* This mod creates an item that, when held in the main hand and shift is pressed, opens a GUI with two slots that only accept diamonds. */

// First, create the item
public class DiamondHolderItem extends Item {
    public DiamondHolderItem(Properties properties) {
        super(properties);
    }
    
    // Override onItemUse method to open the GUI when shift is pressed
    @Override
    public ActionResult<ItemStack> use(World world, PlayerEntity player, Hand hand) {
        if (player.isShiftKeyDown()) {
            if (!world.isClientSide) {
                NetworkHooks.openGui((ServerPlayerEntity) player, new DiamondHolderContainerProvider(), buf -> buf.writeItem(player.getItemInHand(hand)));
            }
            return ActionResult.success(player.getItemInHand(hand));
        }
        return ActionResult.pass(player.getItemInHand(hand));
    }
}

// Then, create the container provider
public class DiamondHolderContainerProvider implements INamedContainerProvider {
    @Override
    public ITextComponent getDisplayName() {
        return new TranslationTextComponent("container.diamond_holder");
    }
    
    @Nullable
    @Override
    public Container createMenu(int id, PlayerInventory playerInventory, PlayerEntity playerEntity) {
        return new DiamondHolderContainer(id, playerInventory);
    }
}

// Finally, create the container with two slots that only accept diamonds
public class DiamondHolderContainer extends Container {
    public DiamondHolderContainer(int id, PlayerInventory playerInventory) {
        super(ModContainers.DIAMOND_HOLDER.get(), id);
        
        this.addSlot(new Slot(playerInventory, 0, 26, 26) {
            @Override
            public boolean mayPlace(ItemStack stack) {
                return stack.getItem() == Items.DIAMOND;
            }
        });
        
        this.addSlot(new Slot(playerInventory, 1, 44, 26) {
            @Override
            public boolean mayPlace(ItemStack stack) {
                return stack.getItem() == Items.DIAMOND;
            }
        });
    }
    
    @Override
    public boolean stillValid(PlayerEntity player) {
        return true;
    }
}

/* Note: This is a simplified example and may need to be adjusted based on your mod's needs. For example, you may need to add additional code to handle syncing the item's inventory with the server, saving/loading the item's inventory, etc. */