reply on: LN Roulette – A Lightning-Powered, Provably Fair Roulette Game \ stacker news ~bitcoin

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122 sats \ 13 replies \ @pycan 4 Jan \ on: LN Roulette – A Lightning-Powered, Provably Fair Roulette Game bitcoin

Can you elaborate on "provably fair"? How can I verify?

1074 sats \ 12 replies \ @roulette OP 4 Jan

Absolutely! Here’s how we do it:

Before each spin, we generate a random number (0..36) and a salt, then publish the SHA-256 hash of num:salt After the spin, we reveal the salt, so you can re-hash the exact same num:salt combination. If the hash matches what we published before the spin, you know the result couldn’t have been altered.

21 sats \ 3 replies \ @nout 11 Jan

So you could easily be generating number 16 slightly more often and insider would use this to their advantage, right? The hashing doesn't prevent that?

0 sats \ 1 reply \ @BitcoinMaximan 15 Jan

Contrary to the popular belief, the house actually never wants to do this. It is in house's best interest to have as much random spread as possible, because non random leads to exploits.

0 sats \ 0 replies \ @nout 15 Jan

If you are talking major casino that wants to sit there for decades, then yeah. But in this case they can just for fun squeeze couple megasats out of this and shut it down.

0 sats \ 0 replies \ @pycan 11 Jan

That's a good point, didn't think of that. Seems like there's always a way to get fucked over by the house :D

101 sats \ 5 replies \ @pycan 4 Jan

Is the random number generated and hash published before any placed bets? Otherwise, you can still pick the number that is not in favor of most participants.

32 sats \ 4 replies \ @roulette OP 5 Jan

Yes, absolutely. We publish the hashed result (random number + salt) before any bets are placed. Once it’s publicly hashed, we can’t just choose another salt or number afterward. Because of how SHA-256 works, forging a second salt to match the exact same hash is essentially impossible. When the spin ends, we disclose the salt so you can verify we didn’t alter the result based on bets.

0 sats \ 2 replies \ @1GLENCoop 5 Jan

Where is it published?

1 sat \ 1 reply \ @roulette OP 7 Jan

you can navigate to spins menu

0 sats \ 0 replies \ @1GLENCoop 7 Jan

Right on. I see it. Cool.

0 sats \ 0 replies \ @pycan 5 Jan

That makes sense, sounds good!

100 sats \ 0 replies \ @Jon_Hodl 4 Jan

Mint

100 sats \ 0 replies \ @1GLENCoop 4 Jan

Wow, cool way to do provably fair! The logic checks out. I zapped ya 1K sats for that!