ETH / STARK
fee 0%- Swap ETH → STARKhook takes 1.00%
- Swap STARK → ETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0xf96d5745baeb6adec2cb8a3c86d1d2d2bf2d25fe843f92e3f500f8d3a76938f9
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
114 pools use this hook, the first one 99 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 1% 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() but it has sweepPlatform, setFee, sweep, setDistributor.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
114 pools over 98 days.
Measured at block 92,892,117. 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 0xf96d5745baeb6adec2cb8a3c86d1d2d2bf2d25fe843f92e3f500f8d3a76938f9
pool 0xd6c9983e20925e719d32fc214ea31002c5931bba1a70e44b6bbc7557ed25dd25
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.