Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,239,524
0x7248…28CC
The eight checks
5 pools use this hook, the first one 88 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 switchNo owner() but it has collect.
- 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 record5 pools over 87 days.
Measured at block 93,239,524. 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.
ETH / FLCHK
fee 0%- Swap ETH → FLCHKno liquidity at the current price
- Swap FLCHK → ETHno liquidity at the current price
- Add, then remove liquiditydeposit refused: LiquidityLocked
pool 0x009b0654faf489b56c5b5862f5b9fc8936258f2b2b1c924bdfd1da197d5f6399
Read from the bytecode
- Code size
- 19,232 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 24
- 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.
- 0x07901e20 accruedOf
- 0x0885f732 poolConfig
- 0x15f64920 phaseOf
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x25d1821c curveSpot1e18
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.
0x2e793bff
deepen
0x497777d5 collect0x575e24b4 beforeSwap0x5e094390 lpAccrued0x6545a45d curveOf0x6983835e graduate0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x7eda4179 GRAD_SQRT_PRICE0x83bb39d2 MIN_DIST_FEE_BPS0x886b9131 numeraireOf0x91dd7346 unlockCallback0x991ed012 effectiveFeeBps0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbfe10928 distributor0xc3cb1bb7 register0xc45a0155 unknown0xc4e833ce getHookPermissions0xc7c4f6b3 MAX_DIST_FEE_BPS0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xdf0b3667 LP_BPS0xe1b4af69 afterDonate0xe9a892c0 RAKE_BPS0xedd6ea76 quoteBuy0xf2c963fd quoteSell0xf92f23a7 accrued0xf9731d9b register