Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,949,742
0x539b…c0C0
The eight checks
24 pools use this hook, the first one 46 d ago.
- 01pass
Permissions that touch your moneyNone of the permissions that let a hook take from swaps or from LPs are switched on.
- 02pass
What it takes from a swapA swap through it pays the pool fee and nothing else.
- 03pass
LPs can get outLiquidity added and removed in the same block came back whole.
- 04pass
The fee is the feeA fixed fee of 1%, written in the pool key.
- 05pass
No one holds the switchNo owner and no admin functions found.
- 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 record24 pools over 45 days.
Measured at block 92,949,742. 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 & 0x3fff0x00c0 · 00000011000000
- 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.
SPY / ball
fee 1%- Swap SPY → ballnothing taken
- Swap ball → SPYnothing taken
- Add, then remove liquiditycame back whole
pool 0x9e2a99a12bf5c6436c8f9ab4fd7d9fe6f9b806bb4ab7a63161033788d3b28336
fire / AAPL
fee 1%- Swap fire → AAPLnothing taken
- Swap AAPL → firenothing taken
- Add, then remove liquiditycame back whole
pool 0xa79009d22d321491651bfb4f50a6ec1bc6a6d5080a10aede796c706c329a6830
Read from the bytecode
- Code size
- 8,787 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 0
- 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.
- 0x02669b52 launchpad
- 0x0318d755 getQuote
- 0x0a0ef1b8 MAX_OBSERVATION_AGE
- 0x1e2cc944 buybackRouteProvisioningVersion
- 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- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
- After swap. Runs after every swap.