Uniswap

Uniswap is a noncustodial automated market maker implemented for the EVM. The peer-to-peer system is designed for exchanging cryptocurrencies on the blockchain. The protocol is implemented as a set of persistent, non-upgradable smart contracts; designed to prioritize censorship resistance, security, self-custody, and to function without any trusted intermediaries who may selectively restrict access. Uniswap v3 provides increased capital efficiency and fine-tuned control to liquidity providers, improves the accuracy and convenience of the price oracle, and has a more flexible fee structure in comparison to earlier versions of the protocol.