Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,393,833
0x741d…4880
The eight checks
3 pools use this hook, the first one 56 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 0x8d9b122Ad2Bec9946D129Ffe09b8822188888888. Owner-style functions: transferOwnership, setAllowedProviders, setPoolChargedFee, setAllowedProvider, setPoolFeeConfig, setDefaultFeeConfig.
- 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 record3 pools over 55 days.
Measured at block 93,393,833. 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.
ETH / DJT
fee dynamic, now 0%- Swap ETH → DJTno liquidity at the current price
- Swap DJT → ETHno liquidity at the current price
- Add, then remove liquiditydeposit refused: SenderNotPositionManager
pool 0xf39126d74026334aecc98656b7864bdc599f5d1e2e9ef00549dc2deb3595cafa
Read from the bytecode
- Code size
- 12,217 bytes
- Owner
- 0x8d9b122Ad2Bec9946D129Ffe09b8822188888888
- 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.
- 0xe1a45218 BPS_DENOMINATOR
- 0xe5598293 getPoolKey
- 0xe8d89ece getPoolFeeConfig
- 0xe950970c DEFAULT_SIMULATION_GAS_LIMIT
- 0xf26ef49d DYNAMIC_FEE_FLAG
- 0xf2fde38b transferOwnership
- 0xc594b619
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.
setAllowedProviders
0xce07d308 registerPool0xd00934ba selectFeeFromRoll0xd4fa882b primaryTierOneFee0xdc4c90d3 poolManager0x9789ae80 isPoolRegistered0x9f43c63f clearFeeOverride0x9f7973b9 simulationGasLimit0xb7d1a2b7 isAllowedProvider0xc4e833ce getHookPermissions0x7f354bf6 SIMULATION_GAS_BUFFER_BPS0x8a8ef0ae setPoolChargedFee0x8da5cb5b owner0x907491a2 getPoolSimulationGasLimit0x94168af8 swapCount0x5c9cbbea unknown0x5fbbc0d2 getFeeConfig0x63e094ad getFeeOverride0x70b0a4e3 primaryPoolId0x791b98bc positionManager0x7b06fd49 setAllowedProvider0x3e930009 setPoolFeeConfig0x3fc48eba MAX_LP_FEE0x575e24b4 beforeSwap0x5a8ad6e6 setDefaultFeeConfig0x5c975abb paused0x2b6ad0e8 setFeeOverride0x3055c173 selectPoolFeeFromRoll0x38e42316 wouldTreatAsSimulation0x3a0d5443 setDefaultFee0x3b01d64d OVERRIDE_FEE_FLAG0x0d3c09f7 poolConfigVersion0x128e1ac1 setSimulationGasLimit0x16c38b3c setPaused0x259982e5 beforeAddLiquidity0x28b8f2bc getAllowedProviders