ETH / TEST
fee 0%- Swap ETH → TESTnothing taken
- Swap TEST → ETHhook takes 3.00%
- Add, then remove liquiditycame back whole
pool 0xb1354eddba8b1411534ce54cf1a23299f2df0cd4ecfa4b1a41eb0835e2eb92ec
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 29 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 3.00% 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.
No owner and no admin functions found.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 28 days.
Measured at block 93,430,473. 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 0xb1354eddba8b1411534ce54cf1a23299f2df0cd4ecfa4b1a41eb0835e2eb92ec
pool 0x27e8728a7ed57b19bdb60b681530a07058b63752a12fefdf29bc39162523bae3
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.