ETH / KBW
fee 0%- Swap ETH → KBWhook takes 1.00%
- Swap KBW → ETHhook takes 1%
- Add, then remove liquiditycame back whole
pool 0xfc14f0b6371d2b07eade5f1d7b6b8189e30104b211aa1cd99a47d960d3e9b834
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 43 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 1% 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 0x491dD2208AC664Eb230C6E3249E222773e8FE866. Owner-style functions: setRate, setSniperTax, withdrawAll, transferOwnership, withdraw.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
4 pools over 42 days.
Measured at block 93,297,650. 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 0xfc14f0b6371d2b07eade5f1d7b6b8189e30104b211aa1cd99a47d960d3e9b834
pool 0xb83f900eebf792811f71f028cdb6eb42b9baf7a2f1d346ca2dd8221537b6172b
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.