USDG / USO
fee dynamic, now 0%- Swap USDG → USOno liquidity at the current price
- Swap USO → USDGno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0xb42e8d95dc2193973e076eaf0b9977a8f741cb05b5ec53bc7dd5094a550ff1fb
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
32 pools use this hook, the first one 59 d ago.
None of the permissions that let a hook take from swaps or from LPs are switched on.
No pool with liquidity to swap through yet.
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 and no admin functions found.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
32 pools over 58 days.
Measured at block 92,983,460. 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 0xb42e8d95dc2193973e076eaf0b9977a8f741cb05b5ec53bc7dd5094a550ff1fb
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.