Uniswap is the largest decentralized trading protocol on Ethereum. It facilitates the exchange of tokens through Automated Market Maker (AMM) smart contracts. Anyone can become a "Liquidity Provider" (LP) by depositing assets into a pool, earning trading fees in return. The protocol is designed to be permissionless and immutable, meaning no central entity controls the funds or restricts access.

The Uniswap ecosystem has evolved from a set of smart contracts into a comprehensive DeFi infrastructure stack:

Uniswap v4 Launch (Jan 2025): The protocol officially deployed Uniswap v4, a major architectural upgrade. This version introduced "Hooks," which act as plugins for liquidity pools. Hooks allow developers to add custom logic—such as dynamic fees, limit orders, or KYC checks—directly to a pool without rewriting the core protocol.

Unichain Mainnet: Uniswap Labs launched Unichain, a Layer 2 blockchain built on the OP Stack (Optimism Superchain). Unichain is designed specifically for DeFi, utilizing Trusted Execution Environments (TEEs) to achieve sub-second block times (250ms) and reduce the cost of transactions by approximately 95% compared to Ethereum L1.

"UNIfication" Fee Switch (Nov 2025): A landmark governance proposal, dubbed "UNIfication," passed preliminary voting. This proposal activates the long-dormant "fee switch" on v2 and v3 pools, directing a portion of trading fees to the protocol treasury to programmatically buy back and burn UNI tokens, potentially altering the token's long-term supply dynamics.

The UNI token governs the world's most widely used DEX protocol:

Governance: UNI holders have the exclusive right to vote on protocol upgrades, treasury grants, and fee parameters.

Fee Switch Activation: The primary utility debate for UNI revolves around the "Fee Switch." With the 2025 UNIfication proposal, the token is moving toward a model where it directly governs the collection and burning of protocol revenue.

Delegation: Holders can delegate their voting power to representatives (Delegates) who actively participate in the complex decision-making process.

Architecture: AMM (v2/v3) + Singleton Contract (v4)

Network: Ethereum, Unichain (L2), & Multi-chain

Token Standard: ERC-20

Total Supply: 1 Billion UNI (Inflationary after 4 years, offset by potential burns)

Key Feature: Hooks (Customizable Pools)