ETH / VLVT
fee dynamic, now 5%- Swap ETH → VLVTnothing taken
- Swap VLVT → ETHnothing taken
- Add, then remove liquiditycame back whole
pool 0x9836c557a57b279fefe537d25fcceaf05c922410e824657d2d4a64b10c1100d6
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 19 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.
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 5% now and can change.
No owner() but it has claim, claimFor, claimable.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 18 days.
Measured at block 93,418,028. 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 0x9836c557a57b279fefe537d25fcceaf05c922410e824657d2d4a64b10c1100d6
pool 0xbeca8763207aa3d712712b357b2c14935a0fc7412f3ec1aaad5fc6b24da50023
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.