ETH / CHOMPZ
fee 0%- Swap ETH → CHOMPZhook takes 4.72%
- Swap CHOMPZ → ETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0x741e3f0adf59f8fc19958d3a37548e8c16d984777e8d3a6929c587c0b4f5be94
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
3 pools use this hook, the first one 64 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.
It takes 4.72% of each swap on top of the pool fee.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0%, written in the pool key.
Owned by 0x802B0947B8A4516AACB1DEf78049AE1F9b8A24A4. Owner-style functions: setPoolFee, setFactory, transferOwnership.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 64 days.
Measured at block 93,362,123. 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 0x741e3f0adf59f8fc19958d3a37548e8c16d984777e8d3a6929c587c0b4f5be94
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.