ETH / HEIRLOOM
fee 0%- Swap ETH → HEIRLOOMno liquidity at the current price
- Swap HEIRLOOM → ETHno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0xa1e19b309940da94c73a8ee8fa7dc1f8d409c1235360c95fd9ec11965dc513bc
Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
21 pools use this hook, the first one 29 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.
No pool with liquidity to swap through yet.
Liquidity added and removed in the same block came back whole.
A fixed fee of 0%, written in the pool key.
Owned by 0x107C9113229df34DD49A594BF1d19816E836343e. Owner-style functions: setFactory, transferOwnership.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
21 pools over 29 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 0xa1e19b309940da94c73a8ee8fa7dc1f8d409c1235360c95fd9ec11965dc513bc
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.