Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,999,293
0xEb4f…45c7
The eight checks
17 pools use this hook, the first one 43 d ago.
- 01caution
Permissions that touch your moneyThe address enables after swap returns delta, after add returns delta, after remove 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.
- 04caution
The fee is the feeIts pools use a dynamic fee that the hook sets before every swap. It stands at 0% now and can change.
- 05caution
No one holds the switchOwned by 0x1b45E67C1D9C1c6107d9460aD69A9838B37Fa093. Owner-style functions: setPaused, setOwnerBps, paused, setExemptAddress, setCreatorBps, setTrustedRouterBatch.
- 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 record17 pools over 43 days.
Measured at block 92,999,293. 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 & 0x3fff0x05c7 · 00010111000111
- 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.
TSLA / USDG
fee dynamic, now 0%- Swap TSLA → USDGno liquidity at the current price
- Swap USDG → TSLAno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0x5d5c9484193c54a1bb31e7ad9f48d7ba87dc14c023af4e5fa75f0dc5281a1de1
Read from the bytecode
- Code size
- 18,349 bytes
- Owner
- 0x1b45E67C1D9C1c6107d9460aD69A9838B37Fa093
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 8
- 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.
- 0x08ac6289 tierTwoFee
- 0x14724809 unknown
- 0x16c38b3c setPaused
- 0x1c21e91e unknown
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- After add liquidity. Runs after each deposit.
- After remove liquidity. Runs after each withdrawal.
- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
- After swap. Runs after every swap.
- After swap returns delta. Can take part of what you get out of every swap.
- After add returns delta. Can charge LPs on the way in.
- After remove returns delta. Can take part of what LPs withdraw.
0x265acb63
unknown
0x29f03851 setOwnerBps0x38759da4 gasThreshold0x3ae9a260 quoteFee0x403fefe5 unknown0x46904840 feeRecipient0x4b4687b5 whitelistOnly0x50e67a96 unknown0x53608258 unknown0x54b9c343 ownerBps0x575e24b4 beforeSwap0x58ad48fd unknown0x5a6c72d0 defaultFee0x5ba9f60a unknown0x5c975abb paused0x64c01488 unknown0x66945096 unknown0x687e2c17 trustedRouter0x698c3891 setExemptAddress0x6ada0ce6 unknown0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x73fd43e2 unknown0x7d79e7d4 unknown0x810da780 exemptAddress0x8da5cb5b owner0x94168af8 swapCount0x952e60c2 unknown0x9a50c628 tierOneFee0x9d951b3b tierThreeFee0x9f063efc afterAddLiquidity0x9f6fd915 unknown0xa307f997 setCreatorBps0xac807cf4 unknown0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc446726a setTrustedRouterBatch0xc45a0155 unknown0xc4e833ce getHookPermissions0xc64f5351 setTrustedRouter0xcb3b3ab3 setGasThreshold0xd18e3427 unknown0xd9caed12 withdraw0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xde90e29b creatorBps0xdfc063db unknown0xe1a45218 BPS_DENOMINATOR0xe1b4af69 afterDonate0xe4fbb609 CREATOR0xe52e3820 DEFAULT_CREATOR_BPS0xe74b981b setFeeRecipient0xea05a8c6 setWhitelistOnly0xea5736af unknown0xf2fde38b transferOwnership0xf8a49c89 unknown0xfe850e29 unknown