Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,889,457
0xf506…EAc0
The eight checks
95 pools use this hook, the first one 90 d ago.
- 01caution
Permissions that touch your moneyThe address enables before remove liquidity. The hook is allowed to take; the next two checks measure whether it does.
- 02pass
What it takes from a swapIt takes 1% on top of the pool fee.
- 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 0x38044EA2A5606d8d7967BB81FCC5932fb1CDB7E7. Owner-style functions: setTrustedRouter, upgradeToAndCall, setFactory, UPGRADE_INTERFACE_VERSION, transferOwnership.
- 06fail
The code cannot changeIt is a proxy. The code that runs lives at 0xdcE20DdcC2B01A3Cb265528b7d2Ec76f7609427a.
- 07pass
Only the PoolManager can call itEach callback refused a call that did not come from the PoolManager.
- 08pass
Track record95 pools over 90 days.
Measured at block 92,889,457. 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 & 0x3fff0x2ac0 · 10101011000000
- 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 / SCALESTR
fee dynamic, now 0%- Swap ETH → SCALESTRhook takes 1.00%
- Swap SCALESTR → ETHhook takes 1%
- Add, then remove liquiditydeposit refused: reverted without a reason
pool 0x80c34ea86916675a8603f175cac444e1c33a50630e33fbfe10446933d4cacec8
ETH / COLIBRI
fee dynamic, now 0%- Swap ETH → COLIBRIhook takes 1.00%
- Swap COLIBRI → ETHhook takes 1.00%
- Add, then remove liquiditydeposit refused: reverted without a reason
pool 0xaee7dd68f2e7d3a7b77dd4a309b444154b76c8f1583c9b28b26a0939c2f0f811
Read from the bytecode
- Code size
- 12,736 bytes
- Owner
- 0x38044EA2A5606d8d7967BB81FCC5932fb1CDB7E7
- Proxy
- yes, code at 0xdcE20DdcC2B01A3Cb265528b7d2Ec76f7609427a
- DELEGATECALL
- present
- 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.
- 0x18b15ca6 currentNativePrincipal
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x30040054 poolIdOf
- 0x3fc48eba MAX_LP_FEE
- 0x4e0f5cc8
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.
setTrustedRouter
0x4f1ef286 upgradeToAndCall0x52d1902d proxiableUUID0x575e24b4 beforeSwap0x5bb47808 setFactory0x5c60e39a market0x69922f07 registerMarket0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x791b98bc positionManager0x79ba5097 acceptOwnership0x8da5cb5b owner0x98d652f1 graduationStatus0x9acda3bb trustedRouter0x9f063efc afterAddLiquidity0xad3cb1cc UPGRADE_INTERFACE_VERSION0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc45a0155 unknown0xc4d66de8 initialize0xc4e833ce getHookPermissions0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xe30c3978 pendingOwner0xe6e948f7 REQUIRED_HOOK_MASK0xf2fde38b transferOwnership