Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,430,418
0xa9c8…1098
The eight checks
3 pools use this hook, the first one 32 d ago.
- 01caution
Permissions that touch your moneyThe address enables before 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 2.05% 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 0x6a684C214DD48A163a3025bE50718419062e144A. Owner-style functions: sweepTo, setTrackerShareBps, 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 32 days.
Measured at block 93,430,418. 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 & 0x3fff0x1098 · 01000010011000
- 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.
SPCX / SPACEDOG
fee 0%- Swap SPCX → SPACEDOGhook takes 1.00%
- Swap SPACEDOG → SPCXnothing taken
- Add, then remove liquiditycame back whole
pool 0xde10befb4f6fce387f720f2e162c90ddb0faa1a95ed8547d696007e992594694
SPY / PEPE
fee 0%- Swap SPY → PEPEhook takes 1.00%
- Swap PEPE → SPYhook takes 2.05%
- Add, then remove liquiditycame back whole
pool 0xc82546be7485188c8edba6f08e1822b4c73ad021c6d732b4fcfd7ea6ae8e30aa
Read from the bytecode
- Code size
- 10,582 bytes
- Owner
- 0x6a684C214DD48A163a3025bE50718419062e144A
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 11
- 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.
- 0x01d035f4 pendingTracker
- 0x09197a81 LAUNCH_FEE
- 0x0aeef8c8 sweepTo
- 0x0b9219ae pendingPlatform
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5
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 swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
- After donate. Runs after a donation to LPs.
- Before swap returns delta. Can take part of what you put into a swap, or change how much is swapped.
beforeAddLiquidity
0x46ca626b TICK_SPACING0x575e24b4 beforeSwap0x58c0f10d MIN_FEE_RATE0x6726cb4e trackerShareBps0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x79ba5097 acceptOwnership0x7d1d589c getLaunch0x8da5cb5b owner0x8df83709 clearPending0x91dd7346 unlockCallback0x92f6576e MAX_FEE_RATE0x95eae396 ANTI_SNIPE_DURATION0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbe171157 openLaunch0xc3ec5c2a setTrackerShareBps0xc45a0155 unknown0xcaa93ee8 currentFee0xd73792a9 FEE_DENOMINATOR0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xe2fdcc17 escrow0xe30c3978 pendingOwner0xf2fde38b transferOwnership