HIRS / SBF
fee dynamic, now 1%- Swap HIRS → SBFnothing taken
- Swap SBF → HIRSnothing taken
- Add, then remove liquiditycame back whole
pool 0xaf293190f02d0eb1b3d1fa12366e655f423816f650eb534c12f371431914c1cc
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
5 pools use this hook, the first one 37 d ago.
None of the permissions that let a hook take from swaps or from LPs are switched on.
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. It stands at 1% 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.
5 pools over 37 days.
Measured at block 93,240,023. 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 0xaf293190f02d0eb1b3d1fa12366e655f423816f650eb534c12f371431914c1cc
pool 0x20d66d4e5af82230b65886e86283e59aa60ddd501a11720578716e00d093dee9
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.