Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,173,602
0x1C74…a8CC
The eight checks
6 pools use this hook, the first one 46 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.
- 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 0x5F29890B5b1d005E2dA78aA1687a690562CE5f1b. Owner-style functions: setMarketRegistrationSpread, setBaseSpreadFloor, sweepDestination, setBaseSpread, setSizeRungs, sweepMargin.
- 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 45 days.
Measured at block 93,173,602. 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 & 0x3fff0x28cc · 10100011001100
- 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.
TENDIES / USDG
fee 0%- Swap TENDIES → USDGno liquidity at the current price
- Swap USDG → TENDIESno liquidity at the current price
- Add, then remove liquiditydeposit refused: LiquidityNotAllowed
pool 0x147ad6e980b5122f013d756ca51efbc9a0215e4f388fdcc84dd411ca4634af9a
Read from the bytecode
- Code size
- 14,050 bytes
- Owner
- 0x5F29890B5b1d005E2dA78aA1687a690562CE5f1b
- 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.
- 0x17d01716 unregisterPair
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x320ed5c8 sizeRungs
- 0x454aca9e MAX_SPREAD_BPS
- 0x466c5e1f
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 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.
setMarketRegistrationSpread
0x490c98f5 tokenJar0x50879c1c weth90x529a2def spreadBpsFor0x55f69f38 fundBuy0x575e24b4 beforeSwap0x673e0481 pairs0x67e92bcc setBaseSpreadFloor0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x70aaca57 jarFeeBps0x715018a6 renounceOwnership0x79ba5097 acceptOwnership0x7ce46fb5 sweepDestination0x80f55605 market0x8da5cb5b owner0x95f4f05a registerPair0x9b8c6261 beaconSeeded0x9e250928 baseSpreadFloorBps0x9f063efc afterAddLiquidity0xa9bf3933 registerPairFromMarket0xad1d17d2 accruedSpreadMargin0xad6d917b setBaseSpread0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbbcf1f1f resellerCode0xc1f48676 isPairRegistered0xc8cbf10f setSizeRungs0xc99b0335 sweepMargin0xcd37200a isPairReady0xd47f6877 sweepETH0xd5ab76af setResellerCode0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1a45218 BPS_DENOMINATOR0xe1b4af69 afterDonate0xe30c3978 pendingOwner0xe5948f8e accruedDust0xf0475791 setSweepDestination0xf2fde38b transferOwnership0xf365773d marketRegistrationSpreadBps