Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,974,573
0xdaC9…A444
The eight checks
20 pools use this hook, the first one 17 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 10% 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 switchNo owner() but it has blockScale, updateFeeAddressForCollection, updateFeeAddress.
- 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 record20 pools over 16 days.
Measured at block 92,974,573. 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 & 0x3fff0x2444 · 10010001000100
- 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 / PITBOYSTR
fee 0%- Swap ETH → PITBOYSTRhook takes 10%
- Swap PITBOYSTR → ETHhook takes 10%
- Add, then remove liquiditydeposit refused: NotNFTStrategy
pool 0x0622750901d3c3128935f807262db7e8482ec9c5ffcd81afc42bb99dd331d709
Read from the bytecode
- Code size
- 6,911 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 11
- 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.
- 0x0343f506 calculateFee
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x41275358 feeAddress
- 0x48469b68 deploymentTime
- 0x575e24b4
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.
- After add liquidity. Runs after each deposit.
- After swap. Runs after every swap.
- After swap returns delta. Can take part of what you get out of every swap.
beforeSwap
0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x7f090f18 blockScale0x8609dbc8 updateFeeAddressForCollection0x9accab09 deploymentBlock0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbbcaac38 updateFeeAddress0xc4e833ce getHookPermissions0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xea6974c2 adminUpdateFeeAddress0xf08eb649 feeAddressClaimedByOwner