Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,087,231
0xE46E…c8cc
The eight checks
9 pools use this hook, the first one 98 d ago.
- 01caution
Permissions that touch your moneyThe address enables before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
- 02caution
What it takes from a swapIt takes 1.25% of each swap 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.
- 04pass
The fee is the feeA fixed fee of 0.30%, written in the pool key.
- 05caution
No one holds the switchNo owner() but it has claimProtocolFees, transferCreatorRole, claimCreatorFees, setCreatorPayout, setInitialPayout.
- 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 record9 pools over 98 days.
Measured at block 93,087,231. 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 & 0x3fff0x08cc · 00100011001100
- 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 / test8
fee 0.30%- Swap ETH → test8hook takes 1.25%
- Swap test8 → ETHhook takes 1.25%
- Add, then remove liquiditydeposit refused: OutsideLiquidityBlocked
pool 0x4ecadb69a7e2245bc5aecaa02aa1c8508404d33b9a5c5582e3d9172879fe5ba9
ETH / test8
fee 0.30%- Swap ETH → test8hook takes 1.25%
- Swap test8 → ETHhook takes 1.25%
- Add, then remove liquiditydeposit refused: OutsideLiquidityBlocked
pool 0x60882530ee664d3c55e105dbea9e356f4d6fdbd062983b33e5ac97de28be1a80
Read from the bytecode
- Code size
- 14,037 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 3
- 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.
- 0xe1b4af69 afterDonate
- 0xf6c00927 getPool
- 0xff94e4f3 creatorOf
- 0xd7b96d4e locker
- 0xdc4c90d3 poolManager
- 0xdc98354e beforeInitialize
- 0xcbf89ac9
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.
- 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.
claimProtocolFees
0xcee5eb2e graduationThreshold0xd3fd6631 markGraduated0xc45a0155 unknown0xc4e833ce getHookPermissions0xc5e153f7 feeBps0xbb443aeb feeBpsForMc0xbdb89858 graduationProgressBps0xbf333f2c FEE_BPS0xb47b2fb1 afterSwap0xb6905a10 transferCreatorRole0xb6a8b0fa beforeDonate0xaed6d9a1 SNIPE_MAX_BUY0xaf8d60b5 claimCreatorFees0xb21b6342 assignedFloorOf0x9bbf0d58 MAX_EVER_ASSIGNED0x9f063efc afterAddLiquidity0xa6ae3031 POST_GRAD_FEE_BPS0x853709e0 unclaimedFees0x8549d9be REQUIRED_FLAGS0x902d55a5 TOTAL_SUPPLY0x7b467390 MAX_CREATOR_PAYOUT_WALLETS0x7e20340a SNIPE_WINDOW_BLOCKS0x803db96d protocolTreasury0x6c2bbe7e afterRemoveLiquidity0x6f9fab78 getCreatorPayout0x6fe7e6eb afterInitialize0x575e24b4 beforeSwap0x597ed96a setCreatorPayout0x65d7b483 poolIdOfToken0x5315769b graduationReady0x533b5b9a registerPool0x56bf5ddc creatorBps0x2721b788 isGraduated0x3f308a7f setInitialPayout0x4beff463 assignedRecipients0x18bce47b creatorBpsForMc0x21d0ee70 beforeRemoveLiquidity0x259982e5 beforeAddLiquidity0x03288707 accumulatedEth0x0a5294e9 marketCap