Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,144,060
0x33D8…c0CC
The eight checks
7 pools use this hook, the first one 100 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.
- 02caution
What it takes from a swapIt takes 2.36% 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 0xF8aF351b7A537677b4E144FD854827A4BF86f6aA. Owner-style functions: setFactory, setStockRoute, claimOwed.
- 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 record7 pools over 99 days.
Measured at block 93,144,060. 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 & 0x3fff0x00cc · 00000011001100
- 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 / TIBBIR
fee 0%- Swap ETH → TIBBIRhook takes 2.00%
- Swap TIBBIR → ETHhook takes 2.36%
- Add, then remove liquiditycame back whole
pool 0x904c4e6798b63279a4511bf8445eff6b92f88cd3050c30a9336525d98cea884a
ETH / DIV
fee 0%- Swap ETH → DIVhook takes 2.00%
- Swap DIV → ETHhook takes 2%
- Add, then remove liquiditycame back whole
pool 0x2c87b7684f34a7aa12921bd2650ef610aed3b926d352fde6da060ce0f7a2004c
Read from the bytecode
- Code size
- 12,878 bytes
- Owner
- 0xF8aF351b7A537677b4E144FD854827A4BF86f6aA
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 19
- 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.
- 0x03fd2a45 DEAD
- 0x18280dda registerPool
- 0x19091452 configOf
- 0x21c099c8 poolKeyFor
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- 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.
beforeAddLiquidity
0x27fd8b2b depositStock0x3884124a reassignRecipient0x41861b10 buybackAndBurn0x46ca626b TICK_SPACING0x575e24b4 beforeSwap0x5bb47808 setFactory0x68ac3817 setStockRoute0x6c2bbe7e afterRemoveLiquidity0x6cfea99a recipientCount0x6fe7e6eb afterInitialize0x80a65dd1 buyStockAndDistribute0x8cff1b67 releaseStockReserve0x8da5cb5b owner0x91dd7346 unlockCallback0x9344eb90 stockConfigOf0x9cd651d2 recipientAt0x9f063efc afterAddLiquidity0xa6980ce2 MAX_RECIPIENTS0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbfb562e8 stockRouteOf0xc45a0155 unknown0xd3cd52bc TOTAL_BPS0xd55be8c6 MAX_FEE_BPS0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xdf18e047 owed0xe0b6348a devBuy0xe1b4af69 afterDonate0xf2652d9c claimOwed