WETH / HODL
fee 0%- Swap WETH → HODLhook takes 25%
- Swap HODL → WETHno liquidity above the price
- Add, then remove liquiditydeposit refused: NotFactory
pool 0x090324f2d18285ddc405b7d10d9cff34befcc35865cbbe74328ac10728aa22da
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
4 pools use this hook, the first one 31 d ago.
The address enables before remove liquidity, before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
It took 24.99% of a swap on top of the pool fee.
Closed to outside LPs: only the hook's own liquidity is in the pool.
A fixed fee of 0%, written in the pool key.
No owner() but it has setFactory.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
4 pools over 30 days.
Measured at block 93,298,459. 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 0x090324f2d18285ddc405b7d10d9cff34befcc35865cbbe74328ac10728aa22da
pool 0x8ec345ef21456d53d78107593bd79ab963261db8571199b080eb63f30e990053
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.