Topic ยท 20 guides
Provably fair guides
Provably fair means you can check a result yourself. Start with the overview, then go into seeds, hashing, RNGs and a calculator you can run on a finished round.
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Provably fair casino guide: how to check every result
A provably fair casino publishes a cryptographic commitment to each game's random seed before you bet, then reveals the seed after the game. Because anyone can recompute the result from the revealed seed and confirm it matches the earlier commitment, you do not have to trust the operator's word that the result was not changed.
How fairness works
Provably fair games: how each type is verified
Provably fair games explained: how coinflip, jackpot, roulette, dice, crash and cases are verified, what to check on each, and a worked PVPspinArena example.
Commit reveal scheme: the idea behind provably fair
What a commit reveal scheme is, why hiding and binding matter, how hash commitments work, and how games, auctions and blockchains use them to prove fairness.
Server seed vs client seed: how provably fair seeds work
Server seeds, client seeds and nonces explained: what a client seed generator does, why seeds are hashed first, and how PvP games commit to a seed instead.
HMAC-SHA256 explained: how it powers provably fair games
What HMAC-SHA256 is, how it differs from a plain SHA-256 hash, and how provably fair games use it with a committed server seed to make results checkable.
Nonce and Cursor: How Each Bet Gets Its Own Result
One seed pair produces thousands of results through the nonce and cursor. How each bet is derived, with a verification example you can repeat.
Seed Rotation: When and Why to Reveal a Server Seed
Rotating a server seed is how you close the book on past bets. When to rotate, how to verify the reveal, and what rotation cannot prove.
SHA-256 Explained for Gamblers
SHA-256 is the hash behind provably fair gambling. What a hash does, why it cannot be reversed, and how it locks a server seed in advance.
Chainlink VRF in Gambling: On-Chain Randomness Explained
Verifiable random functions let a contract prove its randomness. How VRF works, how it compares with commit-reveal, and what it cannot prove.
Smart Contract Casinos: Fully On-Chain Gambling
Fully on-chain casinos hold funds and settle bets in code. How the contracts work, where randomness comes from, and the audit risks involved.
Decentralised Casinos: Custody, Governance and Trade-Offs
Decentralised casinos vary hugely in custody and governance. Compare the models, the fairness claims, and the questions to ask before depositing.
Zero knowledge proof explained: privacy, rollups and fair games
Zero knowledge proof explained: the cave example, SNARKs vs STARKs, uses in privacy coins, rollups and card games, and how ZK compares to commit-reveal.
RNG versus hashes
RNG casino vs provably fair: which can you trust?
How an RNG casino generates results, how certified RNG audits work, how provably fair differs, and which model lets you verify each bet yourself.
How random number generators work in casino games
How random number generators work in casinos: PRNG versus hardware RNG, seeding, and how provably fair hashes give you a check the RNG box does not.
Check a result
Provably fair calculator: how to check any game result
Use a provably fair calculator to check a game result: verify the seed hash, recompute HMAC-SHA256 and map it to the outcome, with worked examples.
Provably fair roulette: how every spin is verified
How provably fair roulette works: seed commitments, HMAC-SHA256, rejection sampling for an unbiased wheel, and how to verify any spin step by step yourself.
How to Verify a Casino Bet, Step by Step
A complete walkthrough for verifying a single bet: gathering seed data, running the check, reading the output and escalating a mismatch.
Casino Fairness Audits: Who Certifies What
Testing labs certify RNGs and payouts, but the scope is narrower than sites imply. What an audit covers and how to verify a seal is real.
Smart Contract Audit: What the Report Covers
A smart contract audit is a paid review of code at one commit. Learn what the report can show and what a badge does not promise about a casino.
eCOGRA Certification: Scope, Date, and the Seal
eCOGRA certification is a testing-lab report, not a lifetime promise. Learn how to read the scope and date before you trust a footer seal.