THROBBIN / CHIRP
fee 0.25%- Swap THROBBIN → CHIRPhook takes 0.75%
- Swap CHIRP → THROBBINhook takes 0.75%
- Add, then remove liquiditycame back whole
pool 0x264be406b0ab766e5b82450494fb31947c9f719d75a969b440ff8170c834a7d9
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
19 pools use this hook, the first one 88 d ago.
The address enables after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
It takes 0.75% on top of the pool fee.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0.25%, written in the pool key.
No owner() but it has transferOwnership, setDeployer, setArenaFeeHelper.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
19 pools over 88 days.
Measured at block 92,973,715. 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 0x264be406b0ab766e5b82450494fb31947c9f719d75a969b440ff8170c834a7d9
pool 0x6201d70a15bc7a991cfaf028ea48758c95e54b725e9c69e7d437140c8cefa11c
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.