btw any way to decode smart contract to readable format? what I get is something like assembly code mov, eax and so on

You won't get more readable than that

Or else, you can do manual inspection and try to figure out the program flow

roger that
where to read about side chaines?
I want to implement some protocol p2p, where something is encrypted or shuffled and 3rd party with stake will verify it or "mint" idk what term is right.
Where to read about it? cryptozombies is good? I just completed newbie part :D
And about security, any tools to pentest it?
I saw "secure math" library in some contracts, it's used when sub uint256 to avoid overflow and so on. How to get in production?