WETH / MTX2
fee 0%- Swap WETH → MTX2hook takes 1.00%
- Swap MTX2 → WETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0x28512fde83a182607d512b938bd2723d0a6d4181b64e3c557eb832b71dcea41f
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
4 pools use this hook, the first one 46 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.
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.
No owner() but it has claim.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
4 pools over 45 days.
Measured at block 93,268,279. 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 0x28512fde83a182607d512b938bd2723d0a6d4181b64e3c557eb832b71dcea41f
pool 0x75f627e4041cb4cefbb3f1e06b43b9069dd53100feab31e994e5fc49931d016c
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.