ETH / ZEC
fee 0%- Swap ETH → ZEChook takes 0.90%
- Swap ZEC → ETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0x37d60d8fdf1b7889fa50dd8f07a17a3bd3ac54530ff4c9cff10202de97e2ef37
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
5 pools use this hook, the first one 32 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 0.90% 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 0x642ce1172f9bC4c4A9B0051FF2B9A666301f576d. Owner-style functions: setFactory, transferOwnership.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
5 pools over 31 days.
Measured at block 93,241,857. 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 0x37d60d8fdf1b7889fa50dd8f07a17a3bd3ac54530ff4c9cff10202de97e2ef37
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.