ETH / CATHOD
fee 0%- Swap ETH → CATHODhook takes 2.99%
- Swap CATHOD → ETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0xe49f729f3c2c25d1c78ee4d7152a1eb86e1790e2369264bab60fd1b6df57aa02
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
55 pools use this hook, the first one 56 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 2.99% 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 0x16e82F3C8d343408AC63c1998A556eBB562a60a9. Owner-style functions: setPoolFee, setFactory.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
55 pools over 56 days.
Measured at block 92,921,060. 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 0xe49f729f3c2c25d1c78ee4d7152a1eb86e1790e2369264bab60fd1b6df57aa02
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.