Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,973,715
0x84B9…4880
The eight checks
19 pools use this hook, the first one 48 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, setPoolEnabled, setBlacklistBatch, setTrustedRouters, setSwapCaller, setSwapCallers.
- 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 record19 pools over 47 days.
Measured at block 92,973,715. 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.
AMC / WETH
fee dynamic, now 0%- Swap AMC → WETHno liquidity at the current price
- Swap WETH → AMCno liquidity at the current price
- Add, then remove liquiditydeposit refused: InvalidPositionManager
pool 0xa744abacbf693cb1fde01373015c31779fc974c9147a3390b1ce8f8f650cae84
Read from the bytecode
- Code size
- 10,477 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.
- 0x03bcd4eb isLiquidityProviderAllowed
- 0x153b0d1e setBlacklist
- 0x1dd3e63e setPoolEnabled
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
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.
0x264e97e0
isTrustedRouter
0x3400101a unknown0x3abc97e5 setBlacklistBatch0x42e7e7ed MAX_BLACKLIST_BATCH_SIZE0x4aafc842 unknown0x572ef17a unknown0x575e24b4 beforeSwap0x64a361c0 isPoolEnabled0x678a5b33 setTrustedRouters0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x7673d076 setSwapCaller0x791b98bc positionManager0x79ba5097 acceptOwnership0x809b18d5 WEIGHT_DENOMINATOR0x8da5cb5b owner0x98c47e8c feeConfiguration0x9f063efc afterAddLiquidity0xa21a70fc MAX_ALLOWLIST_BATCH_SIZE0xa2474614 setSwapCallers0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc33451dc unknown0xc4e833ce getHookPermissions0xc64f5351 setTrustedRouter0xcdebb81d unknown0xd037ddd3 unknown0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xe30c3978 pendingOwner0xe8f6ae29 setLiquidityProvider0xeba164de mxSwapAmt0xf2fde38b transferOwnership0xfe575a87 isBlacklisted