WETH / HOOK
fee 0%- Swap WETH → HOOKhook takes 1.00%
- Swap HOOK → WETHno liquidity above the price
- Add, then remove liquiditywithdrawal refused: Liquidity is locked permanently
pool 0x977621583c1e52814555524b970832956498ee6a5d63071516438887225bd8c6
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 10 d ago.
The address enables before remove liquidity, before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
It takes 2.98% of each swap on top of the pool fee.
Liquidity went in and could not come back out.
A fixed fee of 0%, written in the pool key.
No owner() but it has setFactory, transferOwnership.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 10 days.
Measured at block 93,456,057. 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 0x977621583c1e52814555524b970832956498ee6a5d63071516438887225bd8c6
pool 0x186ea10283777e4fe4b9de0df2f008ccf30e7ec7cfbfe8f4125f12712ec83be5
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.