Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,362,988
0x5ee1…4880
The eight checks
4 pools use this hook, the first one 57 d ago.
- 01pass
Permissions that touch your moneyNone of the permissions that let a hook take from swaps or from LPs are switched on.
- 02n/a
What it takes from a swapNo pool with liquidity to swap through yet.
- 03n/a
LPs can get outClosed to outside LPs: only the hook's own liquidity is in the pool.
- 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 0xbcB6b53f6De9AC35d2Ca2FFaBD7f7a617e063C25. Owner-style functions: paused.
- 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 record4 pools over 57 days.
Measured at block 93,362,988. 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 & 0x3fff0x0880 · 00100010000000
- 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.
WETH / SPCX
fee dynamic, now 0%- Swap WETH → SPCXno liquidity at the current price
- Swap SPCX → WETHno liquidity at the current price
- Add, then remove liquiditydeposit refused: error 0x423a91ea
pool 0x0c02f7c3bc99af1ceec046debd100ac10978b6b31363da6bae3a6031fa03c9c8
Read from the bytecode
- Code size
- 12,775 bytes
- Owner
- 0xbcB6b53f6De9AC35d2Ca2FFaBD7f7a617e063C25
- 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.
- 0xe950970c DEFAULT_SIMULATION_GAS_LIMIT
- 0xf26ef49d DYNAMIC_FEE_FLAG
- 0xf8d518a8 unknown
- 0xe1a45218 BPS_DENOMINATOR
- 0xe5598293 getPoolKey
- 0xe8d89ece getPoolFeeConfig
- 0xd00934ba selectFeeFromRoll
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- Before add liquidity. Can refuse a deposit, or only let some addresses provide liquidity.
- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.