WETH / SN496
fee dynamic, now 0%- Swap WETH → SN496hook takes 1.99%
- Swap SN496 → WETHhook takes 1.99%
- Add, then remove liquiditycame back whole
pool 0x17b5d721dc9a16bfc0d3034612369c3de4aa879745ce4d98869e2289b94d3c36
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
8 pools use this hook, the first one 77 d ago.
The address enables before swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
It takes 1.99% 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 and no admin functions found.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
8 pools over 77 days.
Measured at block 93,086,275. 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 0x17b5d721dc9a16bfc0d3034612369c3de4aa879745ce4d98869e2289b94d3c36
pool 0x0eea81d360b6031ee8332c5072f9d32d89f42c0dcb734a32ed166df514bcf3c7
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.