USDG / AIXSTR
fee 0.15%- Swap USDG → AIXSTRhook takes 0.25%
- Swap AIXSTR → USDGhook takes 0.24%
- Add, then remove liquiditycame back whole
pool 0xd58cd9c51b4b21a4ed95b0fff6e6096b19fe3cdb680464ba8fa6b049a704541b
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 22 d ago.
The address enables after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
It takes 0.25% on top of the pool fee.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0.15%, written in the pool key.
No owner() but it has claim.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 21 days.
Measured at block 93,457,898. 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 0xd58cd9c51b4b21a4ed95b0fff6e6096b19fe3cdb680464ba8fa6b049a704541b
pool 0xa94c0a1ce1a26f3fae872914a8dd4a0b0010c78195456c37eb426c2218cd4ee8
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.