Rain is a decentralized protocol for permissionless on-chain prediction markets on Arbitrum.

Rain is a fully decentralized prediction markets protocol on Arbitrum (with cross-chain support) that acts as the “Uniswap of prediction markets.” It lets anyone permissionlessly create, trade, and settle custom public or private markets on any topic using AI oracles for resolution and decentralized arbitration for disputes. Builders receive revenue shares, the protocol offers SDKs/APIs, account abstraction UX, shared liquidity, and a $5M grants program. $RAIN token powers governance via DAO, provides trading-power multipliers, and captures value through volume-tied buyback-and-burn, aligning incentives with adoption.