Fairness and privacy

A head-to-head game is only fair if neither Player can see what they should not, and the result is calculated by rules both Players can check. This page says how Tesoro does that, and where you still have to trust someone.

Games run on chain, not on our servers

Each Game is a program on Solana, not a server owned by Tesoro or by the Game's maker. The program holds the Match state and works out the result, and only the Game's registered program can settle a Match's Pot. Nobody at Tesoro types in a winner.

Hidden information stays hidden

• Hold'em. The deck and each Player's hole cards are private. Your cards are readable only by you; cards become public only at a showdown.
• Block Puzzle. The pieces for a Match are generated at random and are not visible to anyone, including you, until your own run begins. Your moves stay hidden until both runs are closed.
• Trading Duel. Each Player's open position and fills stay hidden while the Match runs, and both full histories are published afterwards.

This is done with MagicBlock's private environment, which runs on secure hardware. Randomness comes from a verifiable random-number service and, in Hold'em, from secrets both Players contribute, so neither a Player nor Tesoro can steer the shuffle.

Results you can check

• Your Block Puzzle score is the game program's replay of your moves. There is no way to submit a score, and an illegal move is rejected.
• The settlement of every Match is a transaction on Solana. Anyone can open the Match page and see the result, the Fees and who got what.
• Time limits, such as a Hold'em turn or a Block Puzzle run, are enforced by the program, and anyone can trigger a timeout or a refund; you do not have to wait for Tesoro.

What you still have to trust

No system removes trust completely. For hidden information, you are trusting:

• MagicBlock's secure hardware and its operator. If that failed, hidden cards, pieces or positions could be seen early. A Player cannot see them, but the environment's operator could in principle.
• The random-number service to deliver honest randomness.

The rest of the trust assumptions, including the price feed, cross-chain messaging and admin keys, are listed in Risks and limits.