DeadZone

I'm still unsure on how to do this with the .containerItem()

How would I get the existing damage on the item?

Hello, I've created a hammer item which damages some blocks when they are hit in the world. I want to be able to craft these blocks, however, the hammer just gets consumed when put in the crafting bench. I've tried adding a container item, however, that just returns the item. I have a max damage property on my item, and was wondering how I can damage it when something is crafted.