Euler Finance is a modular, permissionless lending protocol built on Ethereum, designed to support lending and borrowing of a wide range of crypto assets, including long-tail tokens. Utilizing the Euler Vault Kit (EVK) and Ethereum Vault Connector (EVC), it enables developers to create customizable lending vaults and connect them for complex financial strategies. Euler’s architecture allows for dynamic risk management through asset tiers and supports features like sub-accounts and reactive interest rates.