Xulai

Hi all. I was wondering if there is any event hook for block breaking? As I want to change a static variable upon certain blocks (vanilla included) being broken rather than picked up or so on. And secondly I see we can get the list of values but can we get Keyset or Entryset from NBTTagCompound? It doesn't seem possible to me.. So I guess post in suggestions right? (Just checking it's not possible and checking about block break event before posting in suggestions)