Knowing about the history of your child's father, you can't blame yourself about worrying. Of course the father still has right to your daughter, and this is the reality which you can't refuse. I guess you can request to the court for legal control with his right, provided the court's knowledge of his crime.

I totally agree, you can't trust to person on drugs. And child's worldview is completely undeveloped. Any bad influences should be avoided. I think, father must show initiative and no you, by showing willingness to change.

I totally agree with dpqmw80! If he is still using drugs, you cannot trust him.

Hi. Im only 18 so i don't know if I could be much of help. If it was a court statement in which he said that he was going to stop using/selling drugs, he has to do his part. If he's still doing those things, I think you should take him back to court. As much as you want your daughter to have a relatinship with her father (and as important as it is that she has is) you should really take action and do what's best for her health and for her as a whole. It is not healthy for children to live in or to be exposed to conditions of drug use/selling. And, if im not mistaken, if someone says that a minor is staying with him and that he does both those things, and if the police or whatever investigate the case and find that it's real and that you know of this and still let her go there, you could get in trouble too.
Might I suggest, if you don't want to go back to court with him, that you make him visit your house? And keep doing that until you get PROOF that he has stopped his drug abuse. He could take her for a ride or take her someplace to eat, play and be with her, but also with proof of being in those places. That is just my personal idea. Hope it helps