USDG / FH
fee 0%- Swap USDG → FHtoo little liquidity to measure
- Swap FH → USDGtoo little liquidity to measure
- Add, then remove liquiditydeposit refused: Unauthorized
pool 0x702392ec2492b5de2b1fa2bbda8491425ac3d4405412ea24ef43137824068f80
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 75 d ago.
The address enables before swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
A swap through it pays the pool fee and nothing else.
Closed to outside LPs: only the hook's own liquidity is in the pool.
A fixed fee of 0%, written in the pool key.
No owner() but it has burn, transfer, mint, transferFrom.
Not a proxy, no DELEGATECALL, no SELFDESTRUCT.
Each callback refused a call that did not come from the PoolManager.
4 pools over 74 days.
Measured at block 93,269,964. 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 0x702392ec2492b5de2b1fa2bbda8491425ac3d4405412ea24ef43137824068f80
pool 0x9a2c0f152a95452fd39177e43eefe0c4b2cce034f2cb260bbfb14efd5ac10374
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.