I am not a lawyer but DO NOT GIVE HIM ANY MONEY UNTIL YOU HAVE A AGREEMENT IN WRITING AND THE DIVORCE IS FINAL! Please talk to an attorney before you do anything and make sure he cannot access any of YOUR money. Regardless of how the physical incident started I would file a police report so you can get a restraining order to possibly get him out of the house (yeah you slapped him but 5 punches to the face is not tit for tat, it's abuse). I once dragged my ex out of our sons room by the back of his shirt and he fell because he was drunk, you can bet that if he had punched me he would have gone to jail and been out of the house.
This sounds really bad but if he does not get his act together you may not have to give him anything, his lazyness may be his undoing, don't volunteer to give him anything.