ETH / RBNY
fee 0%- Swap ETH → RBNYhook takes 1%
- Swap RBNY → ETHhook takes 1%
- Add, then remove liquiditycame back whole
pool 0xbbc22e007331a753e49e7ed41ac7af8ea3d84029371df8286ba792c00f54e60d
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 72 d ago.
The address enables after 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 0%, written in the pool key.
No owner() but it has setFactory, settleFees.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
3 pools over 71 days.
Measured at block 93,329,415. 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 0xbbc22e007331a753e49e7ed41ac7af8ea3d84029371df8286ba792c00f54e60d
pool 0xa30a61096b13200dd8eb6907ec6be0fc5d10bea6078c869baee445c5dac2b943
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.