Rain rain
What is Rain?
Rain (RAIN) is an Arbitrum One protocol for permissionless prediction and options markets. Users can create markets around events, choose from listed outcomes, provide liquidity, trade outcome positions, and claim winnings after resolution. Public markets can use Delphi, an AI oracle developed by Olympus AI; private markets can use creator-selected resolution. RAIN is the protocol's native ERC-20 token, used for Trading Power, governance through Rain DAO, and contributor rewards.
What problem does Rain solve?
Rain addresses the difficulty of creating and trading event-based markets without a centralized operator deciding which questions are allowed. Its permissionless design lets users create markets across topics, while pooled liquidity and dynamically priced outcome options make positions tradable before resolution. It also provides an on-chain settlement path for market funds and a dispute process for challenged public-market resolutions. The protocol does not remove oracle, smart-contract, liquidity, market-design, or counterparty risks: an outcome still depends on the configured resolver and the market's rules.
How does Rain work?
Rain markets are deployed on Arbitrum One using smart-contract market pools. A market defines a question, a set of options, timing, a base token, and a resolver. Funds are allocated across options; option prices change with the relative funds committed, and users can buy or place limit orders, sell positions, add liquidity, and later claim payouts. The official Rain SDK describes diamond-proxy pools with an AMM per option, plus transaction builders for market creation, trading, liquidity, resolution, disputes, and claims. Public markets may be resolved by Delphi (Olympus AI): its five Explorer Agents use a consensus rule requiring at least three to agree. A public-market resolution can be disputed with collateral and escalated to decentralized human oracles. Rain also supports account abstraction through RainAA/Alchemy smart accounts, including gas-sponsored execution, and WebSocket streams/API/subgraph integrations for market data. The RAIN token has a stated buyback-and-burn mechanism: 2.5% of each market's trading volume is used to buy and burn RAIN.
Key facts
- Name: Rain
- Ticker: RAIN
- Network: Arbitrum One
- Market type: Permissionless prediction and options markets with public and private modes
- Public resolver: Delphi, an AI-based oracle developed by Olympus AI; its documented consensus requires at least three of five Explorer Agents to agree
- Dispute path: Public-market disputes require collateral and can be escalated to decentralized human oracles
- Token role: Trading Power access, Rain DAO governance, and rewards for market creators, liquidity providers, and resolvers
- Token mechanism: Rain documentation states that 2.5% of every market's trading volume funds RAIN buyback and burn
- Token contract: ERC-20 RAIN at 0x25118290e6A5f4139381D072181157035864099d on Arbitrum One
- Technology: Arbitrum smart contracts; official SDK documents diamond-proxy pools with an AMM per option, account abstraction, transaction builders, analytics, and live WebSocket events
- Launch date: Not stated in the consulted official documentation; do not infer one from current listings
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Frequently asked questions
What is Rain used for?
Rain is used to create, trade, and provide liquidity to prediction and options markets. A user can express a view by buying an outcome position, while liquidity providers fund the market pool.
Is Rain a blockchain?
No. Rain is an application/protocol deployed on Arbitrum One. RAIN is its native ERC-20 token; Arbitrum provides the underlying execution and settlement network.
How are Rain markets resolved?
Public markets may use Delphi, an AI oracle developed by Olympus AI, or another configured resolver. Rain's documentation says Delphi uses five Explorer Agents and confirms an answer when at least three agree. Private markets can use creator-selected resolution.
Can a Rain market resolution be challenged?
Yes, according to Rain's public-market documentation. A participant can file a dispute by posting collateral; the dispute can be escalated to decentralized human oracles. The collateral outcome depends on whether the dispute is upheld.
What does the RAIN token do?
Rain documentation says holding RAIN is required to access Trading Power and participate in prediction markets. Token holders govern through Rain DAO, and market creators, liquidity providers, and resolvers can receive RAIN rewards.
What is unusual about Rain's token economics?
Rain documents a buyback-and-burn mechanism in which 2.5% of every market's trading volume is used to buy and burn RAIN. This links the stated token-supply mechanism to protocol activity, but it does not guarantee token value or price appreciation.
What are the main risks of using Rain?
Prediction-market outcomes depend on question wording, resolver behavior, disputes, and available evidence. Users also face smart-contract, oracle, liquidity, account-custody, and regulatory risks. A market position can lose its deposited funds.
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