How Rainbet Provably Fair Works - Verify Game Results Step by Step

Provably fair technology is what separates transparent crypto casinos from black-box gambling sites. Rainbet implements a cryptographic verification system across all of its original games, letting you independently confirm that every single bet result was determined fairly. Here’s exactly how it works and how to verify your bets.

What Is Provably Fair?

Provably fair is a verification method that uses cryptographic algorithms to guarantee game outcomes are pre-determined and untampered. Unlike traditional online casinos where you trust the operator’s word, provably fair lets you mathematically prove that:

• The casino cannot manipulate results after you place a bet
• Each outcome was committed before your bet was made
• You can independently verify every result using public tools

This system removes the need to blindly trust the house — the math speaks for itself.

How Rainbet’s Provably Fair System Works

Rainbet’s provably fair algorithm relies on three cryptographic elements that combine to produce each game result:

Client Seed

• Controlled by you, the player
• You can view, change, or randomize your client seed at any time
• Changing your client seed ensures the casino has no advance knowledge of your input

Server Seed

• Generated by Rainbet before any bets are placed
• You see a hashed (encrypted) version of the server seed upfront
• The unhashed (raw) server seed is only revealed after you rotate to a new one
• This commitment scheme proves Rainbet locked in the seed before you played

Nonce

• A counter that starts at 0 and increases by 1 with every bet
• Paired with the same client seed and server seed combination
• Ensures each bet produces a unique result even when the seeds stay the same

The Algorithm: HMAC-SHA256

These three inputs are combined using the HMAC-SHA256 hashing algorithm:

result = HMAC-SHA256(serverSeed, clientSeed:nonce)

The output is a hexadecimal string that gets converted into a game-specific result — a crash multiplier, a mine position, a plinko path, or a dice roll. Because HMAC-SHA256 is a one-way function, the result cannot be reverse-engineered or predicted.

How to Verify Your Rainbet Bets (Step by Step)

Follow this process to verify any bet you’ve placed on Rainbet original games:

1. Rotate your server seed — go to the Fairness settings in your account and click to generate a new server seed. This reveals the unhashed version of your previous server seed.
2. Open your Bets page — navigate to your bet history and find the specific bet you want to verify.
3. Click the Verify tab — each bet includes a verification option that shows the client seed, server seed hash, and nonce used for that round.
4. Compare the server seed — confirm the revealed (unhashed) server seed hashes to the same value you were shown before the bet.
5. Recompute the result — use Rainbet’s built-in verification tool, or manually compute the HMAC-SHA256 hash using the three inputs (server seed, client seed, nonce).
6. Confirm the outcome matches — the computed result should produce the exact game outcome you experienced.

Verification Checklist

Step	What to Check	Expected Result
Hash the revealed server seed	SHA-256 of the unhashed server seed	Must match the hash shown before the bet
Compute HMAC-SHA256	Using server seed + client seed + nonce	Produces the hex output
Convert hex to game result	Apply the game-specific conversion	Must match the actual outcome (crash point, mine layout, etc.)

If any step doesn’t match, the result was tampered with — but with HMAC-SHA256, this is cryptographically impossible if the hash commitment was valid.

Which Rainbet Games Are Provably Fair?

Provably fair verification is available on all Rainbet Original games:

• Crash — verify the exact crash multiplier for each round
• Mines — verify the placement of every mine on the grid
• Plinko — verify the ball’s path and landing position
• Dice — verify the rolled number against the target
• Towers — verify safe and danger tile positions on each floor
• Limbo — verify the generated multiplier result

These are all developed in-house by Rainbet with the provably fair algorithm built directly into the game logic.

Provably Fair vs. RNG Slots

It’s important to understand the difference between Rainbet’s original games and third-party slot games:

Feature	Provably Fair (Originals)	RNG (Slots & Live Casino)
Verification	Player can verify every bet	Audited by third-party labs
Transparency	Full cryptographic proof	Trust-based (certified RNG)
Seed control	Player sets client seed	No player input
Providers	Rainbet in-house	Pragmatic Play, Hacksaw, Evolution, etc.
Game types	Crash, Mines, Plinko, Dice, Towers, Limbo	Slots, live dealer, table games

Third-party slot providers use Random Number Generators (RNG) that are independently audited and certified. While you can’t personally verify each spin, these providers are licensed and regularly tested by gaming authorities. Both systems are fair — provably fair just gives you the tools to confirm it yourself.

Tips for Using Provably Fair Effectively

• Rotate your client seed regularly — this adds an extra layer of randomness you control
• Save your seed pairs — keep a record if you want to verify bets later
• Use third-party verification tools — independent HMAC-SHA256 calculators can confirm results without relying on Rainbet’s own tool
• Understand the math — even a basic grasp of hashing ensures you know exactly what’s being verified

Start Playing Provably Fair Games on Rainbet

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