BALALLAIKA / RUBp
fee 0%- Swap BALALLAIKA → RUBpno liquidity below the price
- Swap RUBp → BALALLAIKAhook takes 1.00%
- Add, then remove liquiditycame back whole
pool 0x030f05dd8702568926cdcdac6de2d389a00650525d6b37efb079aaed2d01ce6b
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
38 pools use this hook, the first one 41 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% 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 setStrategy.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
38 pools over 41 days.
Measured at block 92,921,438. 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 0x030f05dd8702568926cdcdac6de2d389a00650525d6b37efb079aaed2d01ce6b
pool 0xb53aefaa2f3f7f3a55e6536693cac62e7016917b0b2959be34e1946187d2240e
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.