UniHooks

V4FunFeeHook

RobinhoodRegistered

Volatility-based fee hook for ETH/token pools on the v4.fun launcher. Charges fees in native ETH on buys (via beforeSwap delta) and sells (via afterSwap delta), scaling between configurable base and max rates (1%–7%) based on the previous swap's tick movement. Exact-output swaps are blocked.

0x0c50153f42ca9412bb4423f78c18858edbeb00cc First pool 26 Aug 2026View on explorer
ALooks safeRegistered, verified, immutable
Pools
8
Dynamic-fee pools
1
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.

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.
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

8 total
PairCreatedFeePool ID
MEME / USDG 2mo dynamic 0xcdc9…6773 Tx ↗
ETH / IYOO 2mo 0.00% 0x7d6c…3860 Tx ↗
ETH / v4Letsgo 2mo 0.00% 0xca71…89ab Tx ↗
ETH / ENTUY 2mo 0.00% 0x7fde…a9d4 Tx ↗
ETH / ENTUY 2mo 0.00% 0x223d…04da Tx ↗
ETH / PUPPETSHOOD 2mo 0.00% 0x1dda…1daa Tx ↗
ETH / PUPPETSRH 2mo 0.00% 0xb7bf…db04 Tx ↗
ETH / PUPPETSRH 2mo 0.00% 0xb033…fba2 Tx ↗