NVDA / TESTO
fee 0%- Swap NVDA → TESTOhook takes 1.00%
- Swap TESTO → NVDAhook takes 1%
- Add, then remove liquiditycame back whole
pool 0xfb0a081a10ddb801c39cd588fc62c82c9f5f9cd45f079ca68b04221ee02b4c0f
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 40 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% 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.
4 pools over 40 days.
Measured at block 93,295,751. 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 0xfb0a081a10ddb801c39cd588fc62c82c9f5f9cd45f079ca68b04221ee02b4c0f
pool 0x52b6080a6863000e73cb514cd08b6de2e07f28a702e452196d70db6a92c19b89
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.