A new Hook available on the open-source directory for Uniswap v4 Hook is causing controversy within the crypto community. Criticising Hook, a user wrote on X that Hook opens the possibility of Decentralised Finance Protocol (DeFi) being whitelisted by regulators. Hook enables users to check KYC of their customers before trading on the pool. KYC is mostly used by financial institutions to authenticate the identity of customers and detect illegal activities. Uniswap is ready to introduce v4 Hook Customizable Hook, which will be easy for government approved entities in early 2024.