USDG / LYNX
fee dynamic, now 0%- Swap USDG → LYNXhook takes 6.00%
- Swap LYNX → USDGhook takes 6.01%
- Add, then remove liquiditycame back whole
pool 0x20489be2bd5b91bb66bdef6fadd264b4443f1ac9ff6b8edfc8b77e7969452f25
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
7 pools use this hook, the first one 17 d ago.
None of the permissions that let a hook take from swaps or from LPs are switched on.
It takes 6.01% 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.
7 pools over 16 days.
Measured at block 93,145,530. 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 0x20489be2bd5b91bb66bdef6fadd264b4443f1ac9ff6b8edfc8b77e7969452f25
pool 0xdddbd30ebb3d185ff661671eb64a1f70ac2f15d6e72a19e5da0c30c4e7504675
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.