Uniswap Labs launched Aggregator Hooks in its web app and API, allowing its v4 router to compare quotes from outside decentralized exchanges with Uniswap liquidity. The feature is live on Ethereum mainnet, Base and Robinhood Chain, with seven outside sources available at launch. Uniswap says those sources account for more than 90% of decentralized-exchange activity on the supported networks, but that measure does not guarantee the best price on every swap.
According to Uniswap, eligible swaps settle in one transaction without extra token approvals solely because they use outside liquidity. Network fees, slippage and smart-contract risks still apply, and any effect on spreads or trading volumes has yet to be measured.
