# Roulana

> Live roulette on Solana. Your money stays in your own safe on-chain. Every bet can be checked.

Roulana is a live European roulette table on Solana with a 3D wheel and a dealer. Players connect a Solana wallet; their money sits in their own on-chain safe, bets are locked and paid by a Solana program, and each round with bets has its number sealed on Solana before betting closes. Status: the free table, with test money on Solana devnet that has no real value. The real table is at https://roulana.com.

## Official addresses

- Website: https://test.roulana.com/
- Game: https://test.roulana.com/play
- Solana program: `7FqVwLDtBPC1YsKpiXUw8HxCJP63hqQKGFcnYXgYgHBn` ([explorer](https://explorer.solana.com/address/7FqVwLDtBPC1YsKpiXUw8HxCJP63hqQKGFcnYXgYgHBn?cluster=devnet))
- Table account: `GNaLiA2MkExXewXH2Yx3TZSxyereAECBY5S3viP2JUtU` ([explorer](https://explorer.solana.com/address/GNaLiA2MkExXewXH2Yx3TZSxyereAECBY5S3viP2JUtU?cluster=devnet))
- Chips (USDC mint): `CzUDygPZVdtTe2KEVA4twsCzc5P38AmhAihTYgYZDVjK` ([explorer](https://explorer.solana.com/address/CzUDygPZVdtTe2KEVA4twsCzc5P38AmhAihTYgYZDVjK?cluster=devnet))
- $ROULANA coin: not launched yet. Any coin with this name today is fake.

## How it works

- Your money, your safe: Your dollars sit in a safe on Solana that belongs to your wallet. Only your wallet can take them out: the Solana program allows nothing else, whether our server is up or not.
- Every bet can be checked: The round’s secret is sealed on Solana before betting closes, and a Solana block made after the bets are in is mixed in. The dealer cannot pick the number, and anyone can check it in one click.
- Rules in a Solana program: A Solana program holds the money and pays every bet by its own rules; the dealer cannot change a bet or a payout. Every transaction is on the explorer, and the program’s source code is public at github.com/roulana/program.
- If a round goes wrong: If a round is ever not finished on Solana within 2 minutes of betting closing, anyone can cancel it: every bet goes back to its safe, like a “no spin” at a real table. The table then stops until the owner has looked into it.

## Fairness

- Every round with money on it has a secret seed. Before betting closes, its fingerprint (a SHA-256 hash) is written on Solana, so the seed cannot be changed afterwards.
- When betting closes, the program waits for a Solana block made after the bets are locked and mixes that block’s hash with the seed. The winning number comes from both: the seed is fixed before the bets, the block comes after them.
- The dealer then reveals the seed on Solana. The program checks it against the fingerprint and pays every bet itself.
- If the seed is not revealed in time, the round is cancelled: every bet goes back to its safe.
- Anyone can check any round with money on it, in one click on the Verify page: it reads the fingerprint, the seed, the block and the number straight from Solana.

## Tokenomics (from launch)

Today, half of the 1 % fee is the service fee for running Roulana and half is set aside for the public buyback wallet, by a rule in the Solana program. There is no coin yet: the buying back, the burn and the prizes start with the coin.

- Fair launch on pump.fun: 1,000,000,000 coins, a fixed supply. No presale and no free coins for anyone. Nobody can create more coins or freeze wallets.
- The bank pays a fee of 1 % of the bets out of its house edge: players pay nothing extra, and odds and payouts stay those of normal roulette.
- 0.5 % is the service fee, for running Roulana: the servers, the Solana network fees for every bet and every round, upkeep and support. 0.5 % buys $ROULANA back automatically.
- Half of what is bought back is burned for good, so the supply only goes down. Half pays the prizes: the day’s 10 biggest wins and the weekly Hall of Fame.
- The owner buys 5 % at launch, in public, locked for 12 months.
- pump.fun’s creator fee on coin trades: half to the prizes, half to running Roulana.
- You never need the coin to play: the table plays in dollars (USDC).

## Live facts

- [Live numbers as JSON](https://test.roulana.com/api/stats): players at the table, spins and money bet and paid today, the bank, the biggest wins of the week.
- [The bank as JSON](https://test.roulana.com/api/bank): the table, every investor, the buyback wallet, the house result by day and month.

## Risks

- Gambling: you can lose what you bet. 18+ only. Play only with money you can afford to lose.
- The bank can lose money on any day; investors share that risk.
- This free table uses test money; nothing here has real value.
- A coin’s price can fall as well as rise; nothing here is a promise of profit.

## Links

- [Full text of the site](https://test.roulana.com/llms-full.txt)
- [Bank page](https://test.roulana.com/bank): the bank's size, share value, investors and history, read live from Solana
- [Game page](https://test.roulana.com/game): the 3D table and its real physics
- [Solana page](https://test.roulana.com/solana): how the program keeps the money, draws the numbers and pays the bets
- [Check a round](https://test.roulana.com/verify): checks any round with money on it straight from Solana, in the browser; or run https://test.roulana.com/verify-round.py
- [Brand page](https://test.roulana.com/brand): the logos to download, the colours and the lettering