Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,205,956
0xEd91…40Cc
The eight checks
5 pools use this hook, the first one 64 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.
- 02pass
What it takes from a swapIt takes 1% on top of the pool fee.
- 03pass
LPs can get outLiquidity added and removed in the same block came back whole.
- 04pass
The fee is the feeA fixed fee of 0%, written in the pool key.
- 05caution
No one holds the switchOwned by 0x08b343B6f31dE3A0eeF22BE14c534491a9216A17. Owner-style functions: claimFees, setBuybackDustThreshold, claimAllFees, setHookFee, setCreatorShare, setAntiSnipe.
- 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 record5 pools over 63 days.
Measured at block 93,205,956. 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 & 0x3fff0x00cc · 00000011001100
- 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.
TSLA / MTESLA
fee 0%- Swap TSLA → MTESLAhook takes 1.00%
- Swap MTESLA → TSLAhook takes 1%
- Add, then remove liquiditycame back whole
pool 0xb463261d0b6194a79c9b4b5e920a8fdd25e7d3954ea28211143b6dee6ccf7b75
GME / GME TEST
fee 0%- Swap GME → GME TESThook takes 1.00%
- Swap GME TEST → GMEhook takes 1%
- Add, then remove liquiditycame back whole
pool 0x655e14c0dd3dfd824b0ccf9a7e249db66965895ab26f8127b1325de6ec054582
Read from the bytecode
- Code size
- 9,351 bytes
- Owner
- 0x08b343B6f31dE3A0eeF22BE14c534491a9216A17
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 9
- 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.
- 0x0d08591b buybackDustThreshold
- 0x25aea74a tokenFeeParams
- 0x2975067d MAX_CREATOR_TAX_BPS
- 0x2dbfa735 claimFees
- 0x328ebc13 snipeWindowBuyVolume
- 0x431a9caa MAX_TOTAL_FEE_BPS
- 0x4fbc1f67
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- 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.
deployerDumpDays
0x534a8465 trustScore0x575e24b4 beforeSwap0x61d027b3 treasury0x65d1dfdf MAX_ANTI_SNIPE_EXTRA_BPS0x6637e38c BPS_DENOM0x6fbfa86f antiSnipeExtraBps0x715018a6 renounceOwnership0x7230f381 MAX_DEPLOYER_DUMP_EXTRA_BPS0x79ba5097 acceptOwnership0x87ca6f83 CREATOR_SHARE_FLOOR_BPS0x8a5f443b totalBuyVolume0x8da5cb5b owner0x8f775d86 setBuybackDustThreshold0x96958b8f claimAllFees0xa652c57b setHookFee0xb0368c7e pendingBuyback0xb1a25c94 creatorShareBps0xb47b2fb1 afterSwap0xbc99b6cd deployerSellVolume0xbe9ca9e1 totalSellVolume0xc45a0155 unknown0xc4e833ce getHookPermissions0xc6878f4e MAX_HOOK_FEE_BPS0xc6acbb8f setCreatorShare0xd1759e6c setAntiSnipe0xd4570c1c claimable0xdc4c90d3 poolManager0xe30c3978 pendingOwner0xe4103712 registerToken0xea26abcf hookFeeBps0xeb241b2e antiSnipeBlocks0xecdfeca8 setDeployerDump0xf0f44260 setTreasury0xf2fde38b transferOwnership0xfed6bc07 deployerDumpExtraBps0xffa1ad74 VERSION