Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,361,247
0x1bf8…0880
The eight checks
3 pools use this hook, the first one 56 d ago.
- 01pass
Permissions that touch your moneyNone of the permissions that let a hook take from swaps or from LPs are switched on.
- 02n/a
What it takes from a swapNo pool with liquidity to swap through yet.
- 03n/a
LPs can get outClosed to outside LPs: only the hook's own liquidity is in the pool.
- 04caution
The fee is the feeIts pools use a dynamic fee that the hook sets before every swap. It stands at 0% now and can change.
- 05caution
No one holds the switchOwned by 0x5d991E91BF2F04b727c3F49fAd38933b6c7F22cE. Owner-style functions: setBlacklist, setBlacklistBatch, transferOwnership.
- 06pass
The code cannot changeNot a proxy, no DELEGATECALL, no SELFDESTRUCT.
- 07pass
Only the PoolManager can call itEach callback refused a call that did not come from the PoolManager.
- 08pass
Track record3 pools over 55 days.
Measured at block 93,361,247. A hook with an owner or a dynamic fee can behave differently later; scan again before a large trade.
What the address allows
A v4 hook's permissions are the last fourteen bits of its address. The PoolManager calls only what they switch on.
address & 0x3fff0x0880 · 00100010000000
- bit 13Before initialize
- bit 12After initialize
- bit 11Before add liquidity
- bit 10After add liquidity
- bit 9Before remove liquidity
- bit 8After remove liquidity
- bit 7Before swap
- bit 6After swap
- bit 5Before donate
What it did to a real swap
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.
WETH / NVDA
fee dynamic, now 0%- Swap WETH → NVDAno liquidity at the current price
- Swap NVDA → WETHno liquidity at the current price
- Add, then remove liquiditydeposit refused: InvalidPositionManager
pool 0x4ad612ac420d78de3fa72631f6e4603f8acb9c1a9f071d2c4c12b01de0e8a606
Read from the bytecode
- Code size
- 8,539 bytes
- Owner
- 0x5d991E91BF2F04b727c3F49fAd38933b6c7F22cE
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 0
- Callbacks open to anyone
- none
Its functions, uncensored
Selectors found in the dispatcher, named from the public signature database. Red ones are what an owner usually keeps for itself.
- 0x12e05adc unknown
- 0x153b0d1e setBlacklist
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x393bc653 unknown
- 0x3abc97e5 setBlacklistBatch
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- Before add liquidity. Can refuse a deposit, or only let some addresses provide liquidity.
- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.