Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,394,982
0x45a4…E880
The eight checks
3 pools use this hook, the first one 43 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 0x62663EB633603c71951F7669fFdb8D038A1765f0. Owner-style functions: setWhitelist, updateFeeConfig, setWhitelistBatch, transferOwnership, setRegistrar.
- 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 42 days.
Measured at block 93,394,982. 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 & 0x3fff0x2880 · 10100010000000
- 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.
ETH / USDG
fee dynamic, now 0%- Swap ETH → USDGno liquidity at the current price
- Swap USDG → ETHno liquidity at the current price
- Add, then remove liquiditydeposit refused: error 0xabd76cfb
pool 0xb2e33bd58ffc12f28c282465cabc4ba44a2459568ccb0eb38761b8cb7139428c
Read from the bytecode
- Code size
- 11,494 bytes
- Owner
- 0x62663EB633603c71951F7669fFdb8D038A1765f0
- 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.
- 0x081c98c8 unknown
- 0x0d3c09f7 poolConfigVersion
- 0x16aeef28 unknown
- 0x1a3b8171 poolIdOf
- 0x24a602de poolCreator
- 0x259982e5 beforeAddLiquidity
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 swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
0x2b20e397
registrar
0x392aab4e unknown0x3af32abf isWhitelisted0x3b01d64d OVERRIDE_FEE_FLAG0x4db9deb5 unknown0x53d6fd59 setWhitelist0x575e24b4 beforeSwap0x60460f06 MAX_TICK_SPACING0x6c2edb78 unknown0x76c18447 updateFeeConfig0x7729fed5 unknown0x78014266 unknown0x787bc0c0 unknown0x791b98bc positionManager0x79ba5097 acceptOwnership0x809b18d5 WEIGHT_DENOMINATOR0x83341f05 unknown0x8cd52356 unknown0x8da5cb5b owner0x9026f0d3 unknown0x9789ae80 isPoolRegistered0x9e2877b2 defaultFeeConfig0xa3f4bac7 ALL_HOOK_MASK0xa58da0be setWhitelistBatch0xa5f08384 unknown0xaa3aa460 PROTOCOL_VERSION0xaab23540 unknown0xac4e4054 REQUIRED_HOOK_FLAGS0xb046481f unknown0xb178a96c unknown0xb3ea7762 unknown0xb9629a41 feeConfig0xc4452e52 unknown0xca266dfe poolKey0xcf0c3f7d unknown0xd060462e poolSwapCount0xd608f99d defaultConfigVersion0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe30c3978 pendingOwner0xf1163aea unknown0xf26ef49d DYNAMIC_FEE_FLAG0xf2fde38b transferOwnership0xfaab9d39 setRegistrar