ETH / JSPJ
fee dynamic, now 1%- Swap ETH → JSPJnothing taken
- Swap JSPJ → ETHnothing taken
- Add, then remove liquiditycame back whole
pool 0xd85aed4166491646f9c8d833de836991c7414bf8c5f09396e23aa0962afec17d
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 18 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 1% 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 17 days.
Measured at block 93,421,324. 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 0xd85aed4166491646f9c8d833de836991c7414bf8c5f09396e23aa0962afec17d
pool 0x832b34a56ba9dd1fdda1bbe933435e254c846b889cf02b8513c392424ac1c9ae
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.