ETH / NIH
fee 3%- Swap ETH → NIHhook takes 2.00%
- Swap NIH → ETHhook takes 2%
- Add, then remove liquiditydeposit refused: Unauthorized
pool 0xaf0fbea91d6304247130ee7c477cf69f713adbac14c00f976f6f5d2788af1420
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
10 pools use this hook, the first one 17 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 2% of each swap on top of the pool fee.
Closed to outside LPs: only the hook's own liquidity is in the pool.
A fixed fee, but a high one: 3%.
No owner() but it has claimFees, setFeeConfig.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
10 pools over 16 days.
Measured at block 93,086,275. 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 0xaf0fbea91d6304247130ee7c477cf69f713adbac14c00f976f6f5d2788af1420
pool 0xc819eff96aafba190ab34f6f0f10b5b7c1b143c0ab5891e06daf255b476dc98d
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.