Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,949,038
0x8b12…1080
The eight checks
57 pools use this hook, the first one 79 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.
- 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.
- 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 record57 pools over 78 days.
Measured at block 92,949,038. 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 & 0x3fff0x1080 · 01000010000000
- 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 / TENDIES
fee dynamic, now 0%- Swap WETH → TENDIESno liquidity at the current price
- Swap TENDIES → WETHno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0xecbdee550b58b648b46b3231572f77d2c4a16e9f31eee78637819a2bfe2141e0
Read from the bytecode
- Code size
- 5,840 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.
- 0xdc4c90d3 poolManager
- 0xdc98354e beforeInitialize
- 0xe1b4af69 afterDonate
- 0xf811c1dd variableFeeControl
- 0xb6a8b0fa beforeDonate
- 0xc4e833ce getHookPermissions
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- After initialize. Runs once, right after a pool is created.
- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
0xc6db3b4f
filterPeriod
0x975deff4 previewFee0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x84bb1d7d MAX_BASE_FEE_PIPS0x48ee2d36 effectiveMaxVolatilityAccumulator0x575e24b4 beforeSwap0x6378eba3 reductionFactor0x2ebc6a30 MAX_VOLATILITY_ACCUMULATOR0x36119be5 MAX_DECAY_PERIOD0x48d67e1b decayPeriod0x21d0ee70 beforeRemoveLiquidity0x2292fa2e MAX_VOLATILITY_TICKS0x259982e5 beforeAddLiquidity0x06c42806 volatilityState0x18e91031 maxVolatilityTicks0x1ecf3581 baseFeePips