Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,114,689
0x9ef4…9aCc
The eight checks
9 pools use this hook, the first one 34 d ago.
- 01caution
Permissions that touch your moneyThe address enables before remove liquidity, before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
- 02fail
What it takes from a swapEvery swap through it was refused: TradingWindowClosed. Only an approved router may get through.
- 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 switchNo owner() but it has rescueToken, sweepFees, setFloorShareBps, setPlacementParams.
- 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 33 days.
Measured at block 93,114,689. 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 & 0x3fff0x1acc · 01101011001100
- 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.
SCAM / TSLA
fee dynamic, now 0%- Swap SCAM → TSLArefused: TradingWindowClosed
- Swap TSLA → SCAMrefused: TradingWindowClosed
- Add, then remove liquiditydeposit refused: LiquidityLocked
pool 0xb3d7c2557832585ae94f63215cd757edc062d06200048d6e1c63826b116c2b96
JOB / MSFT
fee dynamic, now 0%- Swap JOB → MSFTrefused: TradingWindowClosed
- Swap MSFT → JOBrefused: TradingWindowClosed
- Add, then remove liquiditydeposit refused: LiquidityLocked
pool 0xaec0ccd973d3edb1a3f4c00dea12a2abe4159950e74e79fd39bd6626ba02bbd8
Read from the bytecode
- Code size
- 21,800 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 14
- 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.
- 0x01785603 pendingFees
- 0x01dd00ce deepenSelf
- 0x0a87f148 MAX_TRADE_FEE
- 0x0b36deb7 floorShareBps
- 0x2170b3cc MAX_PLACE_MULTIPLE
- 0x21d0ee70 beforeRemoveLiquidity
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- After initialize. Runs once, right after 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.
- 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.
0x259982e5
beforeAddLiquidity
0x28ff1d4c MAX_LAUNCH_FEE0x2e793bff deepen0x4707d000 rescueToken0x4afb6661 DEFAULT_FLOOR_SHARE_BPS0x4e576dea MAX_LIQUIDITY_BPS0x51a9b6d0 pendingLiquidity0x562a2656 MAX_BAND_OFFSET0x574c6407 increaseObservationCardinality0x575e24b4 beforeSwap0x5902a869 MAX_CREATOR_TAX0x5d9473ce pendingLiquidityFor0x5dd9eb11 poolConfig0x5e419372 bandFor0x62aaf266 consult0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x70e9d244 feeLocker0x8699925a bandWidth0x90a3a042 sweepFees0x91dd7346 unlockCallback0x957385fd consumePendingFees0x95b28777 setFloorShareBps0x9a81e8c1 maxTickDeltaPerObservation0x9bc8966d BAND_STEP0x9f063efc afterAddLiquidity0xa203e0bc currentFee0xa309b6b0 consumePendingCreatorTax0xa72a43b4 registerPool0xaa1d6641 currentFeeFor0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbc063e1a MAX_FEE0xc45a0155 unknown0xc4e833ce getHookPermissions0xcbc6a63d pendingCreatorTax0xcd1338f4 floorBandFor0xd8ce962f maxPlaceMultiple0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xddc9cf94 pendingFeesFor0xe0b8ccea creatorTaxFor0xe1b4af69 afterDonate0xe1f1c4a7 BASIS_POINTS0xe7b88fb8 setPlacementParams0xe7f810cd bandOffset0xe89be9ce pendingCreatorTaxFor0xeae9718d MAX_BAND_WIDTH0xedcef9c6 LAUNCH_FEE_HALVINGS0xf386c3db enableObservations0xf49c17fb donateLiquidity0xfd25021c PLACEMENT_GRID0xffa0832d placement