Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,891,152
0x0310…2aCc
The eight checks
4251 pools use this hook, the first one 48 d ago.
- 01caution
Permissions that touch your moneyThe address enables before remove liquidity, before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
- 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.
- 04pass
The fee is the feeA fixed fee of 0%, written in the pool key.
- 05caution
No one holds the switchNo owner() but it has setLaunchBuyAdapter, updateCreatorRights.
- 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 record4251 pools over 48 days.
Measured at block 92,891,152. 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 & 0x3fff0x2acc · 10101011001100
- 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.
plumber / NVDA
fee 0%- Swap plumber → NVDAno liquidity at the current price
- Swap NVDA → plumberno liquidity at the current price
- Add, then remove liquiditydeposit refused: LiquidityLocked
pool 0xcc5c630714b0463b25bbb81a2eddcb18e9fbc4cc032eebc0e91f48510e1565d1
Read from the bytecode
- Code size
- 15,732 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 11
- 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.
- 0x0885f732 poolConfig
- 0x11d271dc MAX_FEE_COMPONENTS
- 0x14bb8fda executeLaunchBuy
- 0x15dbcb9a poolFeeComponents
- 0x2196478d MAX_LAUNCH_BUY_ROUTE_DATA_LENGTH
- 0x21d0ee70
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- Before initialize. Runs once, when a pool is created.
- Before add liquidity. Can refuse a deposit, or only let some addresses provide liquidity.
- Before remove liquidity. Can refuse a withdrawal. LPs may not get out.
- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
- After swap. Runs after every swap.
- Before swap returns delta. Can take part of what you put into a swap, or change how much is swapped.
- After swap returns delta. Can take part of what you get out of every swap.
beforeRemoveLiquidity
0x23589a63 launchBuyAdapter0x259982e5 beforeAddLiquidity0x3961fed2 setLaunchBuyAdapter0x39d57b02 wired0x431a9caa MAX_TOTAL_FEE_BPS0x485cc955 initialize0x575e24b4 beforeSwap0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x860048eb seedLiquidity0x8bbf6cbd updateCreatorRights0x8f5a26ae MAX_BASE_FEE_BPS0x91dd7346 unlockCallback0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc45a0155 unknown0xc4b7de97 feeEscrow0xc4e833ce getHookPermissions0xcf1a47f9 registerPool0xd5f39488 deployer0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate