That's why I said it's nowhere close to being done despite what Laporta says.
Messi can't say that he's 100% staying due to the fact that Barcelona doesn't know if they can sort this mess out. Basically, he's sitting back and waiting to see what happens. If they can't sort it out, he'll happily move on and join another club. His family will back his decision no matter what.
The problem Barcelona has is, I doubt that Messi will wait too long. He has to decide his future out pretty quickly. I'd imagine he wants to play in his first league game with whatever club it is.