WETH / 100
fee 0.30%- Swap WETH → 100nothing taken
- Swap 100 → WETHnothing taken
- Add, then remove liquiditycame back whole
pool 0xf5b3d8c0ae9b0498915c67cee4938cbe0b3c67fa883b92e8c19a157cec661ffc
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
6 pools use this hook, the first one 37 d ago.
The address enables before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
A swap through it pays the pool fee and nothing else.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0.30%, written in the pool key.
No owner and no admin functions found.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
6 pools over 36 days.
Measured at block 93,174,910. A hook with an owner or a dynamic fee can behave differently later; scan again before a large trade.
A v4 hook's permissions are the last fourteen bits of its address. The PoolManager calls only what they switch on.
A small swap each way and a liquidity round trip, run through the PoolManager and this hook inside a call that is never sent. The pool fee is expected; anything else missing is the hook.
pool 0xf5b3d8c0ae9b0498915c67cee4938cbe0b3c67fa883b92e8c19a157cec661ffc
pool 0x02884651cc7a02d1634db213a4e848337f2ab40ff666baa7d7d12daae33a975a
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.