Avantis is a decentralized trading platform on the Base blockchain offering synthetic perpetual contracts across cryptocurrencies, forex, metals, and commodities. Users can trade using leverage, with fees applicable only on profitable trades under its zero-fee perps model. The platform supports loss rebate mechanisms and dynamic open interest management. Liquidity providers can allocate USDC into risk-tiered vaults to earn fees based on market activity. Avantis utilizes price oracles from Pyth and Chainlink and provides a developer SDK for trading integration.