v4FunFeeHook

RobinhoodRegistered

Shared swap-fee hook for the v4.fun launchpad. Charges ETH fees on buys (deducted from input in beforeSwap) and sells (deducted from output in afterSwap) using a volatility-adjusted rate that scales linearly between a pool's registered baseFeeBps and maxFeeBps based on the tick movement of the previous swap. Only exact-input swaps are permitted.

0x44be6a8f791eeaed6051eba0fec9d98a345a80cc First pool 27 Aug 2026View on explorer

ALooks safeRegistered, verified, immutable

Pools

Dynamic-fee pools

Last new pool

2mo

Code size

5,322 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 / v4 2mo 0.00% 0x17fd…9d29 Tx ↗

ETH / dream 2mo 0.00% 0x7192…f7f1 Tx ↗

ETH / V4 2mo 0.00% 0x141d…d4e0 Tx ↗