Uniswap has launched Aggregator Hooks, a system that connects seven external liquidity sources to its v4 protocol, enabling the decentralized exchange to collect protocol fees from trades routed through competing platforms. The fees contribute to UNI token burns, turning rival trading activity into a potential revenue source for Uniswap's token-burning mechanism.
Integration Details
Announced Thursday, the integration spans Ethereum mainnet and the Layer 2 networks Base and Robinhood Chain, covering more than 90% of decentralized exchange activity across those networks. The connected liquidity sources include Curve, Fluid, Pancakeswap V3, and Slipstream, among others.
Uniswap Labs said the technology automatically compares prices across Uniswap and connected exchanges, with quotes refreshing every block and trades settling in a single transaction. "The whole route settles in a single transaction, with nothing new to approve," the company explained.
Fee Mechanism and UNI Burns
The financial arrangement builds on Uniswap's UNIfication initiative, approved in December 2025, which activated protocol fees and directed collected revenue toward UNI burns. Under the mechanism, fees accumulate in TokenJar contracts, while the Firepit system requires UNI destruction before those assets can be withdrawn. The initiative also authorized a one-time treasury burn of 100 million UNI.
Uniswap Labs confirmed the connection, stating, "Outside sources become v4 pools, and swaps routed through them pay protocol fees, contributing to UNI burn." The feature is already active through Uniswap's Web App and API, with additional networks and liquidity sources planned.
Implications for Competing DEXs
For competing DEX protocols, the arrangement presents a trade-off: more potential trading volume from Uniswap users, but protocol fees flowing toward a rival's token-burning machinery. Uniswap Labs noted that its exchange has processed more than $4.5 trillion in cumulative swaps, but liquidity continues forming elsewhere. "Aggregator Hooks bring it in, benefiting the protocol," the company stated.
