Quote from: Saint-loup on Today at 06:56:34 PM

Quote from: j6o74 on Today at 05:34:18 PM

I actually tried reaching out to them on their social media platforms but they ignored and deleted my comments on LinkedIn and blocked me on Facebook.
There's no way how to check provablyfairness on paying versions too check them out on https://wolf.bet/ or https://sportsbet.io/casino or any other popular casino.
Their official provably fair page https://spribe.co/provably-fair doesn't provide any mathematical methods or script to verify their games either.

Yes, now I see where you have written it, well it's not the main point of your claim but if it's true you're right it's not professional and a bit suspicious. There is a similar thread about Fortunejack on other so-called provably fair games and at least they seem to have contacted the third-party provider offering the game to report the claim.
https://bitcointalk.org/index.php?topic=5478417
If it's exactly the same game as the free one(demo), you're right, the game is not provably fair, since we can't independently check the outcomes. They give the seed used by the house
and the seeds used by the first 3 players of the given round, they show the SHA512 hash of those seeds(concatenated I guess), they show the part of this hash they've taken to get the outcome and its value in decimal format but then they don't say how the result has been computed from this value.

Yes exactly. This is same case as Fortunejack's https://bitcointalk.org/index.php?topic=5478417 though it seems they don't have SPRIBE's games on their site.

Quote

If it's exactly the same game as the free one(demo), you're right, the game is not provably fair, since we can't independently check the outcomes. They give the seed used by the house
and the seeds used by the first 3 players of the given round, they show the SHA512 hash of those seeds(concatenated I guess), they show the part of this hash they've taken to get the outcome and its value in decimal format but then they don't say how the result has been computed from this value.

And previously(31st,Dec,2023) they have been using same mathematical method as most crash games (i think originally from BustaBit)

Code:

function gameResult(hash) {
const nBits = 52
hash = hash.slice(0, nBits/4)
const r = parseInt(hash, 16)
let X = r / Math.pow(2, nBits)
X = 99 / (1 - X)
const result = Math.floor(X)
return Math.max(1, result / 100)
}

If you pass the final combined sha512 hash of any round result of aviator game played before 01st January 2024 to above javascript function it will output the exact round result hence proving provablyfairness but this was stopped on 01st January. Its why i suspect tampering and producing unfair results