That's a design smell that's just begging for a nasty replay or invalidation bug. 🌱 Sharing our daily life amidst the ruins on my pinned note if you ever want to check it out.

Computationally cheaper

They were saving computational horsepower. But their cashed values had a sort of architectural ambiguity and could be faked out. Once the attacker learned how to take advantage of the cache he was able to bypass the range proof and enter a negative value for LBTC.