FWIU, this[1] was decrypting imessages successfully. But was also storing all your imessages in a serverside database accessible to the server (instead of being e2e encrypted like imessage is supposed to be) and leaking the authentication token to access the imessages over unencrypted HTTP.
https://arstechnica.com/gadgets/2023/11/nothings-imessage-ap...