snarks.club runs Hold'em Private (mode 3): a full betting game with flop, turn, and river — not a demo duel. There is no game server. The PokerTable contract holds stacks, enforces turns, and verifies every ZK proof. Your wallet is just another player calling the same functions.
Before each hand, every seated player with a registered BabyJubjub key submits a ZK proof that they applied a secret permutation to the deck. Shuffles chain in seat order — no single dealer can pick the deck. The final encrypted deck is fixed on-chain before any hole cards are dealt.
Cards stay encrypted on-chain (BabyJubjub ElGamal). To deal your holes, you and the other active players each submit decryption shares; the contract combines them threshold-style. Only you run the math locally to see your two cards — everyone else sees ciphertext until showdown.
Check, call, raise, and fold are ordinary transactions. Community cards open when enough players submit matching decryption shares (flop can be batched in one tx). At showdown, everyone who still has live cards must ZK-prove and reveal each hole card — the contract verifies before showing the card publicly.
Shuffle, share, and reveal proofs are generated locally (Noir + Barretenberg in a Web Worker). You press a button when you are ready to sign — nothing is auto-submitted. Proofs can be pre-warmed in the background so the wait feels shorter when it is your turn.
ETH sits in a per-table stack while you are seated. Request cash-out anytime: between hands you leave immediately; mid-hand you finish the current hand first, then withdraw.