USDG / RSU50
fee dynamic, now 0%- Swap USDG → RSU50hook takes 1.70%
- Swap RSU50 → USDGhook takes 1.70%
- Add, then remove liquiditycame back whole
pool 0xedc4c1b56d7640892a3b9db6b627fa83d1957530f47ffa9737e59691748d5110
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
50 pools use this hook, the first one 53 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 1.70% of each swap on top of the pool fee.
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 setLaunchWhitelist.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
50 pools over 53 days.
Measured at block 92,920,669. 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 0xedc4c1b56d7640892a3b9db6b627fa83d1957530f47ffa9737e59691748d5110
pool 0x8146b8af2214df2dd265bc8b3e62963788b4c26a183120d260874d5252b0b45d
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.