this is very interesting... are u interested to do things like this? we could team up and try something together if u down
That's why I won’t continue working on it  it’s pretty complex and I barely have time for it.
The adhesive is the central piece of FiveM. It contains all the protection systems: anti-cheat, resource checker, etc.
If you take a look inside using strings on Kali Linux, you'll notice references to grants. These are part of the system, as well as the JWT info tied to your CFX key:
https://keymaster.fivem.net/api/validate/cfxk_  this returns your grants_token, which you can decode using JWT to view the contents.
It includes various grants and grants_clk (client key). Each key represents an asset listed on your Keymaster, referenced by a number.
With this hash/key, you would theoretically decrypt using a public/private keypair  that’s just my theory though.
It’s possible that something else appears afterwards, like more LUAC code.
The adhesive is honestly the most important file. If you break through it, you've basically wrecked FiveM, because from that point on, you can access everything.
Meaning: you need the correct hash/key, the proper public/private keypair, and the method.
I think they used Botan (C++ crypto library)  it shows up quite a lot.
I was also never really able to figure out the role of the .fxap files. Personally, I suspect they are LUAC chunks  meaning just a minimal part of the script, but I’m not really sure.
The .fxap seems to have a fixed header and footer, and in between there's always an exact number of bytes (though I can’t confirm that 100%).
If you actually know what you're doing or want to dive into this, you should look around other communities focused on GTA V / FiveM and decrypting files  like unknownch.. (if you’re familiar with it).
But even there, a lot of people have already given up.
