Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,861,447
0x75A5…2AEC
The eight checks
9180 pools use this hook, the first one 75 d ago.
- 01caution
Permissions that touch your moneyThe address enables before remove liquidity, 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 5.00% of each swap on top of the pool fee.
- 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 0xD2DeFbd13aFF22D6989E8C14B4517Ec308079E91. Owner-style functions: setTreasury, transferOwnership, setSink, claim, collectPlatform, updateCreator.
- 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 record9180 pools over 74 days.
Measured at block 92,861,447. 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 & 0x3fff0x2aec · 10101011101100
- 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 / FINDR
fee 0%- Swap ETH → FINDRhook takes 5.00%
- Swap FINDR → ETHno liquidity above the price
- Add, then remove liquiditydeposit refused: NotFactory
pool 0xea3679a6eef0549f872915a235c877f415c8473d1f7ec80d40930c565c8c7da3
ETH / TODD
fee 0%- Swap ETH → TODDhook takes 3.00%
- Swap TODD → ETHno liquidity above the price
- Add, then remove liquiditydeposit refused: NotFactory
pool 0x167930b0f4737210142f2238d7e3ccec2356db10d20fde5378f7531117d0fc61
Read from the bytecode
- Code size
- 13,927 bytes
- Owner
- 0xD2DeFbd13aFF22D6989E8C14B4517Ec308079E91
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 9
- 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.
- 0xf0f44260 setTreasury
- 0xf2fde38b transferOwnership
- 0xf7c8d634 tab
- 0xe1a45218 BPS_DENOMINATOR
- 0xe1b4af69 afterDonate
- 0xe30c3978 pendingOwner
- 0xdc4c90d3
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.
- 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.
poolManager
0xdc98354e beforeInitialize0xe1a08f4f platformTab0xd294c215 deliverPlatform0xd73792a9 FEE_DENOMINATOR0xc4e833ce getHookPermissions0xc7e5be16 setSink0xd1ec4cf6 seeded0xc28bc24c sinkFor0xc45a0155 unknown0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbd66528a claim0x9f063efc afterAddLiquidity0xa795c647 currentFeeRate0x92f6576e MAX_FEE_RATE0x96c144f0 claim0x98e5d7e2 claim0x8da5cb5b owner0x91dd7346 unlockCallback0x715018a6 renounceOwnership0x729c7c0a collectPlatform0x79ba5097 acceptOwnership0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x3b0bc87e updateCreator0x575e24b4 beforeSwap0x61d027b3 treasury0x248eb4ec sweep0x259982e5 beforeAddLiquidity0x1808eeb8 pending0x204ef967 platformDestination0x21d0ee70 beforeRemoveLiquidity0x07ef2190 poolConfigs0x12b6e6e7 register