WETH / BFRG
fee 0%- Swap WETH → BFRGhook takes 1.00%
- Swap BFRG → WETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0xa6c091ac96c327b54277c9296b8eaac3d59c7a2ae598c62316a5b91e6db5b2ef
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
20 pools use this hook, the first one 9 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 1.00% 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 setTokenFactory.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
20 pools over 9 days.
Measured at block 92,972,200. 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 0xa6c091ac96c327b54277c9296b8eaac3d59c7a2ae598c62316a5b91e6db5b2ef
pool 0x32412770b0452535d5a3c14c9f64e6a9a5e3419db957c9198b4ae0b919f66e07
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.