ETH / MERIDIAN
fee 0%- Swap ETH → MERIDIANno liquidity at the current price
- Swap MERIDIAN → ETHno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0x79e54039f76f7bf5ae100f5c2f0fcc0ee123f13522b549ead99e687164d4f11e
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
5 pools use this hook, the first one 35 d ago.
The address enables before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
No pool with liquidity to swap through yet.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0%, written in the pool key.
No owner and no admin functions found.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
5 pools over 35 days.
Measured at block 93,207,202. 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 0x79e54039f76f7bf5ae100f5c2f0fcc0ee123f13522b549ead99e687164d4f11e
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.