ETH / YIPES
fee 0.30%- Swap ETH → YIPEShook takes 5.00%
- Swap YIPES → ETHhook takes 5%
- Add, then remove liquiditycame back whole
pool 0x0b04b33008dab53e5ba4136eeb06c64636c08d88082c971dd259b99ec5259320
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
35 pools use this hook, the first one 28 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 5% of each swap on top of the pool fee.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0.30%, written in the pool key.
No owner() but it has settle, claim.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
35 pools over 28 days.
Measured at block 92,923,591. 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 0x0b04b33008dab53e5ba4136eeb06c64636c08d88082c971dd259b99ec5259320
pool 0x085cdc9ef630cc4dcbf9f01506a861c693eb999f0956809b2be08c1f067506c9
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.