ETH / USDG
fee 1%- Swap ETH → USDGtoo little liquidity to measure
- Swap USDG → ETHnothing taken
- Add, then remove liquiditycame back whole
pool 0xf57fc830e5739e8be85d66e54752c3399611312864afa48345aeedf912f3ddc0
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 43 d ago.
None of the permissions that let a hook take from swaps or from LPs are switched on.
A swap through it pays the pool fee and nothing else.
Liquidity added and removed in the same block came back whole.
A fixed fee of 1%, written in the pool key.
Owned by 0x3A7A1f256b6180d59f58eFc080321A09D456Ee9b. Owner-style functions: setFeeReceiver.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 43 days.
Measured at block 93,425,940. 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 0xf57fc830e5739e8be85d66e54752c3399611312864afa48345aeedf912f3ddc0
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.