ETH / LEAN
fee 0%- Swap ETH → LEANhook takes 2.00%
- Swap LEAN → ETHhook takes 2%
- Add, then remove liquiditycame back whole
pool 0xe564042dc15ee8349d3bf77c86f4fef0519c3756022a03b8defe41e8e9a83be8
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
3 pools use this hook, the first one 90 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 2% 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 collect.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 90 days.
Measured at block 93,327,697. 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 0xe564042dc15ee8349d3bf77c86f4fef0519c3756022a03b8defe41e8e9a83be8
pool 0x6d2ed46d6232cb15b1e91707f48b34e0b1494a82047b18db47662f738aec7e25
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.