WETH / BLNK
fee 1%- Swap WETH → BLNKnothing taken
- Swap BLNK → WETHhook takes 1%
- Add, then remove liquiditycame back whole
pool 0xff3b46d227013ad972fd1e4d9d8a1946bedb1bf27263287458cfbabfaf90e43f
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 51 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% on top of the pool fee.
Liquidity added and removed in the same block came back whole.
A fixed fee of 1%, written in the pool key.
No owner() but it has BURN_FLOOR.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
8 pools over 50 days.
Measured at block 93,146,372. 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 0xff3b46d227013ad972fd1e4d9d8a1946bedb1bf27263287458cfbabfaf90e43f
pool 0x1fd78ae1ab8d36676badf1dc7edd5bbe1cce428fb5fd55802a91b94a4bd0e177
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.