Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,144,283
0x3F90…30Cc
The eight checks
6 pools use this hook, the first one 99 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.
- 02n/a
What it takes from a swapNo pool with liquidity to swap through yet.
- 03pass
LPs can get outLiquidity added and removed in the same block came back whole.
- 04pass
The fee is the feeA fixed fee of 0.50%, written in the pool key.
- 05caution
No one holds the switchOwned by 0xeE924367213Ae3764b57d5b9a6214c8188d34060. Owner-style functions: setGlobalPaused, claimableFee, setPoolPaused, 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 record6 pools over 99 days.
Measured at block 93,144,283. 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 & 0x3fff0x30cc · 11000011001100
- 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 / VEX
fee 0.50%- Swap USDG → VEXno liquidity at the current price
- Swap VEX → USDGno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0x43b430322dd9e5cdafdac89bd18eb98f1aed96537809cb9d20f49bcbaf95f60a
Read from the bytecode
- Code size
- 14,046 bytes
- Owner
- 0xeE924367213Ae3764b57d5b9a6214c8188d34060
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 5
- 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.
- 0x037aadbe getPoolConfig
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x28198a5e getVolatilityState
- 0x2e409784 scheduleTreasuryUpdate
- 0x2ed6b75d
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.
- 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 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.
pendingTreasury
0x33b1ab1f unknown0x53aae71b unknown0x551d7cdd unknown0x575e24b4 beforeSwap0x5dd7ca7c creatorTreasury0x61a552dc globalPaused0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x76cad834 setGlobalPaused0x79ba5097 acceptOwnership0x83fbb704 unknown0x8da5cb5b owner0x91311979 CONFIG_DELAY0x91dd7346 unlockCallback0x9a57f74e acceptTreasuryUpdate0x9f063efc afterAddLiquidity0xa1c59afc claimableFee0xa32759ac setPoolPaused0xaae49d70 PIPS_DENOMINATOR0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbf72bfe7 getRegisteredCurrencies0xc4e833ce getHookPermissions0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xded90fa5 unknown0xe1b4af69 afterDonate0xe30c3978 pendingOwner0xe824c5ce MAX_CREATOR_FEE_PIPS0xf2fde38b transferOwnership