Probably North Korea agrees to a moratorium on testing in exchange for food, negotiations, and an end or lessening of sanctions. Where have we heard this before?
If they agree to nuclear disarmament, they get guarantees for their survival as a state.
Kim is not stupid enough to start a war he would lose. So he is looking for a deal he can live with.
I think it will be more than that. I will guess an end to the Korean War, but I hope for a pathway to reunification.