protocol identification
two sourcesUniswap v4 is the fourth major version of the Uniswap DEX, introducing programmable liquidity via hooks and live across multiple EVM chains including all chains in scope (Ethereum, Arbitrum, Avalanche, BNB Chain, Base, OP Mainnet, Polygon). ### Protocol identification
- Name: Uniswap v4
- Category: Decentralized exchange (DEX), automated market maker (AMM) with concentrated liquidity and programmable hooks
- Website / App: v4-specific portal at v4.uniswap.org (protocol site, not primary truth).
- Docs: Uniswap v4 section in Uniswap developer docs covering protocol overview, concepts (hooks, flash accounting, unlock), interfaces and SDK.
- Launch date: Mainnet launch and multi-chain rollout on 31 January 2025 after nine audits, a large security competition and a bug bounty program.
- Chains (within user scope): As of mid‑2026, Uniswap v4 is live on Ethereum, Arbitrum, Avalanche, Base, BNB Chain, OP Mainnet, Polygon together with several other networks (Blast, Ink, Soneium, World Chain, Zora).
- Native token: Uses the existing UNI governance / fee token of the Uniswap ecosystem (not newly introduced with v4). (On‑chain confirmation: Not verifiable as of 2026‑09‑04.) ### Main contract / addresses Public documentation focuses on interfaces rather than listing all chain-specific addresses, but identifies the IPoolManager as the core pool management contract and IHooks as the standard hook interface. Aggregator infrastructure (e.g., Moralis) confirms v4 support on the requested chains, but does not give authoritative core addresses. On‑chain contract addresses and explorer verification status for IPoolManager and related core contracts on each chain: Not verifiable as of 2026‑09‑04. ### Fork lineage & design changes
- Lineage: Uniswap v4 is an official continuation of Uniswap v3 by the same protocol team, not an external fork.
- Key technical changes vs. v3:
- Hooks: External contracts that can run custom logic before/after pool events (initialization, swaps, liquidity changes, donations), enabling dynamic fees, custom oracles, MEV-aware mechanisms, etc.
- Flash accounting: Balances are settled at transaction end, allowing more complex intra-tx operations.
- Unified single PoolManager instead of separate per‑pool contracts, improving gas efficiency and extensibility. ### Audits & security history
- Uniswap v4 underwent nine independent audits, the largest security competition in DeFi to date, and a bug bounty up to $15.5m before launch.
- Hooks are explicitly documented as adding new security considerations; each hook is a separate contract that must be audited individually.
- No documented history of malicious modifications in forks of Uniswap v4 specifically was found; however, numerous Uniswap v2/v3 forks historically introduced insecure or malicious changes. Direct evidence for v4-specific malicious forks: Not verifiable as of 2026‑09‑04. > Contradiction callout: One secondary source claims a June 2023 “launch” for v4, but primary Uniswap communications and multiple independent analyses place the production launch on 31 January 2025; the 2023 date refers to early code release / announcement, not mainnet availability.
Evidence (11)
- Uniswap v4 Protocol Overview
- Uniswap v4 is Here – A New Era of DeFi
- Uniswap V4 Explained: Hooks, Adoption & UNIfication
- v4-llms.txt
- Uniswap v4 Hooks
- Uniswap v4
- Uniswap v4 launches on 12 chains
- Uniswap v4: Supercharging DeFi Across Chains
- Uniswap v4 Support Added | Moralis API Documentation
- What Is Uniswap V4?
- CoinMarketCap Academy: Uniswap launches v4