ETH / WEN
fee 0%- Swap ETH → WENhook takes 1.00%
- Swap WEN → ETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0x18353f5e60a90198b5c9b830052e6e79030eb3beb63c8d0a9f35912a029af81d
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
21 pools use this hook, the first one 92 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 1.00% 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 withdrawTreasury, withdrawCreator.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
21 pools over 91 days.
Measured at block 92,973,974. 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 0x18353f5e60a90198b5c9b830052e6e79030eb3beb63c8d0a9f35912a029af81d
pool 0x370f9c55162258059fe1169e8d7755ad9903878b1076010db2ee1e4ce9f2f111
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.