UniswapPoolsV4FeeHook

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A volatility-based dynamic-fee hook that charges ETH fees (1–5%) on buys in beforeSwap and sells in afterSwap, scaling the fee with the previous swap's tick movement. Fees are sent directly to a per-pool feeRecipient; only exact-input swaps are supported (exact-output swaps always revert).

0xb90c65aa3831e2ca0d79857eec299ea7959500cc First pool 17 Aug 2026View on explorer

ALooks safeRegistered, verified, immutable

Pools

Dynamic-fee pools

Last new pool

20d

Code size

5,442 B

What it can do

Runs code on every swap

Its code executes inside each trade in pools that use it.

Can take tokens from swaps

It can take or add tokens during a swap. Fees, burns and custom curves work this way, and so do scams.

Sets its own swap fee

Pools using it let the hook choose the swap fee instead of a fixed tier.

Safety report

Automated checks, not an audit

✓Not upgradeableNo proxy pattern found: the code is fixed.

✓No owner foundNo owner() function: nobody has an admin switch (as far as the standard check goes).

✓Listed in Uniswap’s hook registryRegistered with Uniswap Labs (a listing, not a security review).

✓Source code publishedThe code on the block explorer matches what's deployed (contract: UniswapPoolsV4FeeHook).

iCan change swap amountsIt has a ReturnDelta permission. Normal for fees and burns, but also how fake-quote hooks steal.

?No audit linkedAutomated checks only.

Pools using this hook

2 total

PairCreatedFeePool ID

IGNITION / USDG 20d dynamic 0xd262…256d Tx ↗

ETH / HOODCAT 2mo 0.00% 0xb3d0…806c Tx ↗