V4FunFeeHook

RobinhoodRegistered

Volatility-based dynamic fee hook for v4.fun pools. Charges ETH fees between 1–7% on buys (via beforeSwap BeforeSwapDelta on input) and sells (via afterSwap delta on output), with the fee scaling linearly based on the previous swap's tick movement. Fees are sent immediately to a per-pool feeRecipient; only exact-input swaps are allowed.

0x186cca26b077de82e45af1a0a7a4b2e0371bc0cc First pool 28 Aug 2026View on explorer

ALooks safeRegistered, verified, immutable

Pools

Dynamic-fee pools

Last new pool

2mo

Code size

5,780 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.

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: V4FunFeeHook).

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

iRestricted swapsSwap access: other. Not everyone can trade every pool.

?No audit linkedAutomated checks only.

Pools using this hook

3 total

PairCreatedFeePool ID

ETH / WAY 2mo 0.00% 0x3e3f…f31e Tx ↗

ETH / DURAG 2mo 0.00% 0xb7ae…0c01 Tx ↗

ETH / WARDLINGS 2mo 0.00% 0x8018…a421 Tx ↗