Please read the actual text of the memorandum, so you don't spread any more baseless accusations. It's only 1 page, it'll just take you a minute and the language it is written in is very accessible.
https://en.wikisource.org/w/index.php?title=Ukraine_Memorand...
The only point that even touches on any kind of guarantees is essentially a promise to "seek immediate United Nations Security Council action" in the case of an attack or a threat of attack IN WHICH NUCLEAR WEAPONS ARE USED. That last part is always conveniently left out whenever anyone tries to throw out the soundbite of "They gave up their nukes for security guarantees". And even if you assume that the nuclear weapon part only covers the "threat" part of the sentence and not the "attack", then you're still left with the only solid guarantee being the seeking of United Nations Security Council action.