Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,456,444
0xD78a…e0cc
The eight checks
3 pools use this hook, the first one 27 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 2.00% of each swap 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 0x04951dEdf8c41CF78470A087735101AD596C6c2d. Owner-style functions: setBaseFee, setMaxBuy, sweep, BURN, setWindows, transferOwnership.
- 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 26 days.
Measured at block 93,456,444. 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 & 0x3fff0x20cc · 10000011001100
- 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.
OTT / NFLX
fee 0%- Swap OTT → NFLXno liquidity below the price
- Swap NFLX → OTThook takes 1.00%
- Add, then remove liquiditycame back whole
pool 0x0a452ecd68a474ce43345fe64b7645b614f6aa3dd4afd0cc0210bb6e528bb8b4
IBAM / IBM
fee 0%- Swap IBAM → IBMno liquidity below the price
- Swap IBM → IBAMhook takes 2.00%
- Add, then remove liquiditycame back whole
pool 0x1835827b4764391522b352db8324db3a4606735126ef7a3693926c2b50c2393a
Read from the bytecode
- Code size
- 13,860 bytes
- Owner
- 0x04951dEdf8c41CF78470A087735101AD596C6c2d
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 13
- 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.
- 0x0cb6d537 snipeWindow
- 0x0eb1b8aa feeBps
- 0x16eebd1e launcher
- 0x21d0ee70 beforeRemoveLiquidity
- 0x249d39e9 BPS
- 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 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.
0x2d3b22ad
fairLaunchWindow
0x37ff33e2 dividendVault0x3b586c7f setBaseFee0x431a9caa MAX_TOTAL_FEE_BPS0x46ca626b TICK_SPACING0x478222c2 feeVault0x517ebdb8 buckets0x575e24b4 beforeSwap0x58c5074b MAX_SNIPE_WINDOW0x5b127f14 MAX_FAIR_WINDOW0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x79ba5097 acceptOwnership0x7a4e37b9 setMaxBuy0x8652edf9 poolKeyOf0x8da5cb5b owner0x8f5a26ae MAX_BASE_FEE_BPS0x901a0122 maxBuyDuringFairLaunch0x91dd7346 unlockCallback0x938577e4 lowerTax0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xb8dc491b sweep0xb9e6152b process0xbf5a5940 baseFeeBps0xc0a2526c BURN0xc0fec2fe LIQ_SWAP_SHARE_BPS0xc1acd255 setWindows0xd8464354 PLATFORM_SHARE_BPS0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xe30c3978 pendingOwner0xe4860339 tokens0xee1a56ce accounted0xf2fde38b transferOwnership0xfae504de register