WETH / PEPE
fee 0%- Swap WETH → PEPEhook takes 5.00%
- Swap PEPE → WETHhook takes 5%
- Add, then remove liquiditycame back whole
pool 0x3dfc4318cbda121789df443c12c9d6dd2b7e798aa13c541ab43d84fe52340dd5
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
19 pools use this hook, the first one 97 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%, written in the pool key.
No owner() but it has claim.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
19 pools over 97 days.
Measured at block 92,976,602. 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 0x3dfc4318cbda121789df443c12c9d6dd2b7e798aa13c541ab43d84fe52340dd5
pool 0xdba3f5ded7832641736e53fea2bd58e600c3aa32845425a259c1c3aa19ed2ee5
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.