SPT / NVDA
fee 1%- Swap SPT → NVDAnothing taken
- Swap NVDA → SPTnothing taken
- Add, then remove liquiditycame back whole
pool 0xd15f55f0666da211bd0b07b3cdece0ef98798e58ed08e7cf3ebf3e6789435796
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 30 d ago.
None of the permissions that let a hook take from swaps or from LPs are switched on.
A swap through it pays the pool fee and nothing else.
Liquidity added and removed in the same block came back whole.
A fixed fee of 1%, 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.
4 pools over 30 days.
Measured at block 93,295,806. 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 0xd15f55f0666da211bd0b07b3cdece0ef98798e58ed08e7cf3ebf3e6789435796
pool 0xc3b073334e9d12ae03d04685eb4cc19cc32fbdc204d221affeffa5bc1010b12c
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.