Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,176,260
0xf91f…C044
The eight checks
5 pools use this hook, the first one 92 d ago.
- 01caution
Permissions that touch your moneyThe address enables 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 7% 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 switchNo owner() but it has setProtocolTreasury, setFactory, claimCreatorFees, transferOwnership.
- 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 92 days.
Measured at block 93,176,260. 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 & 0x3fff0x0044 · 00000001000100
- 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.
PRINTR / TSLA
fee 0%- Swap PRINTR → TSLAhook takes 7%
- Swap TSLA → PRINTRhook takes 7%
- Add, then remove liquiditycame back whole
pool 0xf97556648e952943f7b9e76ad052ad4ead5cb45b468ec450205d8c5054f094f2
SPCX / ELON
fee 0%- Swap SPCX → ELONhook takes 1%
- Swap ELON → SPCXno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0xf72891d02c5a7afdc885616f921f653e4754116d2f520d7ee5cc20412502b188
Read from the bytecode
- Code size
- 10,941 bytes
- Owner
- none found
- 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.
- 0x0c5a61f8 setProtocolTreasury
- 0x0e5c011e harvest
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x39e16d64 tokenFees
- 0x575e24b4
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- After swap. Runs after every swap.
- After swap returns delta. Can take part of what you get out of every swap.
beforeSwap
0x57ae3a9f USDG0x5aa5e561 stockFees0x5bb47808 setFactory0x636c2656 creatorClaimable0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x803db96d protocolTreasury0x8d16539a harvestBounded0x8da5cb5b owner0x91dd7346 unlockCallback0x988b1fa7 poolOf0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc40649fc registerPool0xc45a0155 unknown0xc4e833ce getHookPermissions0xcc718f76 config0xd6ae6e44 claimCreatorFees0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xf2fde38b transferOwnership0xfb5478b3 MAX_REWARDS