ETH / VSPR
fee 0%- Swap ETH → VSPRhook takes 2.50%
- Swap VSPR → ETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0x9c5320e38cf3f2f16f06e6760794ad6ac297f97ff50658fda516c06b9156651f
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 43 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 2.50% 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.
Owned by 0x9E4ba658D745C430A472b4C2FB911E99B98dE5B2. Owner-style functions: claim, setFactory.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
4 pools over 43 days.
Measured at block 93,297,840. 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 0x9c5320e38cf3f2f16f06e6760794ad6ac297f97ff50658fda516c06b9156651f
pool 0x9e4176b2a00cc353cafe22990bca767e0dca29fbbb1a93d7e8571769a11f4306
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.