Predict
Up or down in 15 minutes, on a fully on-chain order book. A winning share pays $1.00 in USDC, sent to your wallet when the round settles.
How a round is settled
Two prices on chain decide it, and one transaction pays every winner
Where the price comes from
Each series has one price source, fixed on chain. The price is signed and posted when a round opens and when it ends; the contract refuses any price its source didn't sign.
- Bitcoin: reading its source…
If no price arrives
If no end price is posted within 10 minutes of the end, the round is void and every share, Up or Down, pays $0.50.
Your USDC stays on chain
Orders, fills and payouts are transactions you sign or can check. Colysium never holds your funds.
Check the contracts:Order bookRoundsShares