WETH / HOODRAT
fee dynamic, now 0%- Swap WETH → HOODRAThook adds 100%
- Swap HOODRAT → WETHtoo little liquidity to measure
- Add, then remove liquiditycame back whole
pool 0x498b78d08bbd532d248d020900da73663d69abde1a4d51296ff9de8b520470f6
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
8 pools use this hook, the first one 94 d ago.
The address enables after add returns delta, after remove returns delta. The hook is allowed to take; the next two checks measure whether it does.
A swap through it pays the pool fee and nothing else.
Liquidity added and removed in the same block came back whole.
Its pools use a dynamic fee that the hook sets before every swap. It stands at 0% now and can change.
No owner() but it has setHoliday, setMarketOpen, setSchedule, setOracleFeed, setSellIsZeroForOne.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
8 pools over 94 days.
Measured at block 93,117,052. 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 0x498b78d08bbd532d248d020900da73663d69abde1a4d51296ff9de8b520470f6
pool 0xc4ec020e29245e3ca04c5af204ec384a1f8d1387d6ed494007865ec5f636be1d
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.