Interesting, thanks for the link. So essentially it acts like a “promissory” note, and it still requires an internet connection to confirm the transaction. Importantly, you can’t spend the money you gained offline until you reconnect.

Seems like it could work but I would still expect hackers to take advantage of it - which is great because the quicker we break the trust of this CBDC sysyem, the more people will seek alternative methods.