How grading works

Every hook gets an automated grade from what can be checked on-chain and in Uniswap Labs' public hook registry. It is not an audit.

A · Looks safe

Listed in Uniswap's registry, source verified, not upgradeable.

B · Probably fine

Not upgradeable, but unregistered or unverified.

C · Be careful

Upgradeable without the ability to change swap amounts, or unregistered and able to change swap amounts.

D · High risk

An upgradeable proxy that can also change swap amounts, or an address with no code.

Why "can change swap amounts" matters

Hooks with a ReturnDelta permission can take or add tokens inside a swap. That's how legitimate fees, burns and custom curves work, and it's also how hooks that quote one price and settle another take money from traders.