ETH / KERMIT
fee 0%- Swap ETH → KERMITtoo little liquidity to measure
- Swap KERMIT → ETHhook takes 10%
- Add, then remove liquiditycame back whole
pool 0x72c5415aa7ffe333b856257eee1bedb5cb702a0ac6e8e8bb17e75ecae7f42ace
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 76 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 took 10.02% of a 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 0xdA555168b6d086539040C194fFd3b2931f45aca4. Owner-style functions: transferOwnership, setStrategy.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 75 days.
Measured at block 93,397,810. 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 0x72c5415aa7ffe333b856257eee1bedb5cb702a0ac6e8e8bb17e75ecae7f42ace
pool 0xf5f52509e7abb88f213689bdec35ab891d376b60e0ed6d58ade56f70232a8b2a
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.