ETH / UNI500
fee 0%- Swap ETH → UNI500hook takes 3%
- Swap UNI500 → ETHhook takes 3%
- Add, then remove liquiditycame back whole
pool 0x6e79d4fb483f4eb54ccbf084c242ede546c29a4e74dd2bb4511c250fe43d6db9
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 26 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 3% of each swap on top of the pool fee.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0%, written in the pool key.
Owned by 0x45a5206b1d36121403f4E8e48D4841425d0DF22c. Owner-style functions: setAdapter, transferOwnership.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 25 days.
Measured at block 93,420,887. 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 0x6e79d4fb483f4eb54ccbf084c242ede546c29a4e74dd2bb4511c250fe43d6db9
pool 0xb9c4eceb4aa4a43ed31f5a8420fa08038d7881b98038b6de04b0788c66dd262c
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.