C'mon. It's obviously and demonstrably not.


Looking at your code, you've used the bustabit method for calculating game outcomes (good!), but then misapplied the same technique to pick a "jpPlayerRandom". This makes no sense, because you can see it in advance and can control the players who are betting.


The litmus test for if something is provably fair, is if you could cheat without players being able to detect it. In this case it'd be very simple to have a house player who wins 100.00% of all bets, and no one would be able to tell if it was legitimate or not.

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FWIW I think there's nothing wrong with having jackpots that are not provably fair, as it's quite difficult to come up with new robust provably fair schemes -- but it's highly unethical to represent something as provably fair that isn't.

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I also think you should address @bsky's question. I'm a little suspicious that you're running a game that is ostensibly -EV, and then misrepresenting something that's not provably far as being so.