Uniswap has released DualPool, an audited, open-source hook for Uniswap v4 that lets liquidity providers earn yield on idle capital while still collecting swap fees, built in collaboration with Spark and developed by Uniswap Labs.

The hook works by parking pool capital in ERC-4626 yield vaults between trades, then pulling exactly what's needed into concentrated liquidity positions the moment a swap arrives, executing atomically, and re-depositing the remainder back into the vaults — all within the same block and without any keeper infrastructure.

Spark will operate the largest DualPool deployment, migrating $150 million in stablecoin liquidity to it, with a livestream today at 2 p.m. ET featuring Uniswap founder Hayden Adams.

The hook has been audited by OpenZeppelin with no critical or high severity findings, and any team can now deploy their own DualPool to start earning on both active and idle assets.