The single shared Uniswap v4 hook for all pools on the gwei.fun launchpad. It charges a platform fee plus optional per-pool creator buy/sell taxes on each swap's specified currency, minting ERC-6909 claims for lazy redemption by token creators and the GWEI buyback vault. An optional anti-snipe launch tax decays linearly to zero over a configurable window.
0xae158f5fb58891064198875ff6008c1af354e088First pool 26 Aug 2026·View on explorer
ALooks safeRegistered, verified, immutable
Pools
2
Dynamic-fee pools
0
Last new pool
2mo
Code size
12,952 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.
Runs at pool creation
It runs when a pool is created, often to lock in that pool’s settings.
Safety report
Automated checks, not an audit
✓Not upgradeableNo proxy pattern found: the code is fixed.
!Has an adminowner() is 0xf1c3…7955. That account can usually change fees, limits or allowlists after you trade.
✓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: SwapFeeHook).
iCan change swap amountsIt has a ReturnDelta permission. Normal for fees and burns, but also how fake-quote hooks steal.