Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,976,209
0x99A6…eAe0
The eight checks
22 pools use this hook, the first one 21 d ago.
- 01caution
Permissions that touch your moneyThe address enables before remove liquidity. The hook is allowed to take; the next two checks measure whether it does.
- 02n/a
What it takes from a swapNo pool with liquidity to swap through yet.
- 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%, written in the pool key.
- 05caution
No one holds the switchOwned by 0x523448ada76649d2FD299880c6ea1A8f7F80432C. Owner-style functions: setTreasury, transferOwnership, setParams, withdrawStanding, setNavGuard.
- 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 record22 pools over 20 days.
Measured at block 92,976,209. 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 & 0x3fff0x2ae0 · 10101011100000
- 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.
USDG / LOT-999
fee 0%- Swap USDG → LOT-999no liquidity at the current price
- Swap LOT-999 → USDGno liquidity at the current price
- Add, then remove liquiditydeposit refused: NoThirdPartyLiquidity
pool 0x4bde485de8e67b2e389af1a536031457bef68dcaa26269cdaed8d8fabbc3ec8a
Read from the bytecode
- Code size
- 23,997 bytes
- Owner
- 0x523448ada76649d2FD299880c6ea1A8f7F80432C
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 22
- 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.
- 0xe30c3978 pendingOwner
- 0xf0f44260 setTreasury
- 0xf2fde38b transferOwnership
- 0xf5b91b7b usdg
- 0xfa3aa3c9 venueKey
- 0xcff0ab96 params
- 0xdc4c90d3 poolManager
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 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 donate. Runs before a donation to LPs.
0xdc98354e
beforeInitialize
0xe1441a56 venueOf0xe1b4af69 afterDonate0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xba1fe411 MAX_SIZE_BUFFER_BPS0xc45a0155 unknown0xc4e833ce getHookPermissions0x91dd7346 unlockCallback0x931bca52 navGuard0x9f063efc afterAddLiquidity0xaee565f6 usdgDecimals0x7170f88e setParams0x72bc3242 seedStanding0x79ba5097 acceptOwnership0x7b103999 registry0x8da5cb5b owner0x5e615a6b getParams0x61d027b3 treasury0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x33bf9a4d MAX_WIDTH_TICKS0x43aa9ad3 standingOf0x575e24b4 beforeSwap0x58e9ea7c MAX_BAND_BPS0x5b1fe192 openVenue0x15b91411 withdrawStanding0x180df104 setNavGuard0x21d0ee70 beforeRemoveLiquidity0x259982e5 beforeAddLiquidity