Coin Flip — How to play & pay table

Everything about the game: how it plays, what each combination pays, the RTP, and how every round can be verified on-chain.

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Coin Flip

Pick Heads or Tails — win 1.98× instantly

House Edge: 1%

Coin Flip is the simplest and fastest game on DODEN.IO. Choose Heads or Tails, place your bet in USDT, and let a provably-fair VRF (Chainlink on EVM, Switchboard on Solana) decide the outcome on-chain. Win and your stake is doubled (minus a 1% house edge) within seconds — no escrow, no custody, just code.

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Fairness

Every flip uses a provably-fair VRF — Chainlink on EVM, Switchboard on Solana — for its randomness. You can verify any past bet by clicking the explorer link in your history (Arbiscan / Solscan). The seed and outcome are stored permanently on-chain.

Randomness by: Chainlink VRF · SwitchboardContract operated by: DODEN.IO

Frequently asked questions

How does Coin Flip work?: Choose Heads or Tails, sign once in your wallet (Permit2 on EVM, a session key on Solana), and the on-chain contract requests randomness from a provably-fair VRF (Chainlink on EVM, Switchboard on Solana). The result is settled in under ten seconds; winning bets pay 1.98 times the wager after a 1% house edge.
What is the win probability for Coin Flip?: Each side has an exact 50 percent probability. The 1 percent house edge keeps the platform sustainable while remaining one of the lowest fees in crypto gambling today.
How much gas does Coin Flip cost per round?: On Arbitrum, a single Coin Flip round costs approximately 0.01 to 0.03 US dollars; on Solana the network fee is a fraction of a cent. You sign once — Permit2 on EVM, a session key on Solana — and play many rounds without separate per-bet approvals.
Can I verify the result of a past Coin Flip bet?: Yes. Every bet has a transaction hash that links to the chain's explorer (Arbiscan on EVM, Solscan on Solana), where you can inspect the VRF seed and contract logic. The contracts ship as verified builds, so the on-chain bytecode can be checked against the source; publishing the full source and IDL is on the roadmap.
Which blockchains support Coin Flip?: Coin Flip runs on Arbitrum (EVM) and Solana. More chains will be added in the next phases of the omni-chain roadmap.