Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,296,174
0x47F1…f800
The eight checks
4 pools use this hook, the first one 20 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.
- 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. It stands at 3% now and can change.
- 05caution
No one holds the switchOwned by 0x7C14BED40bB72466a8563DeB4df48EE383343394. Owner-style functions: setFactory, sweepTreasury, setDistributor, claimCreatorFees, claimHolderPot, setTreasury.
- 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 19 days.
Measured at block 93,296,174. 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 & 0x3fff0x3800 · 11100000000000
- 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.
USDG / RHD
fee dynamic, now 3%- Swap USDG → RHDnothing taken
- Swap RHD → USDGnothing taken
- Add, then remove liquiditydeposit refused: NotFactory
pool 0x294ced2a73090cfb4891cb3de75896ba64be09128db25231f4d373864d6baa3a
ETH / RHNATIVE
fee dynamic, now 1%- Swap ETH → RHNATIVEnothing taken
- Swap RHNATIVE → ETHnothing taken
- Add, then remove liquiditydeposit refused: NotFactory
pool 0x3a3d8bc95ca6f465ab554e09186ac66ce9feed2d41e7f540448e37dfcd3a95f8
Read from the bytecode
- Code size
- 9,362 bytes
- Owner
- 0x7C14BED40bB72466a8563DeB4df48EE383343394
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 3
- 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.
- 0x0e228ab1 treasuryOwed
- 0x1fd71a18 creatorOwed
- 0x21d0ee70 beforeRemoveLiquidity
- 0x249d39e9 BPS
- 0x259982e5 beforeAddLiquidity
- 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 initialize. Runs once, right after a pool is created.
- Before add liquidity. Can refuse a deposit, or only let some addresses provide liquidity.
beforeSwap
0x5bb47808 setFactory0x5dbe3e39 totalHolderFees0x61d027b3 treasury0x67f340cc sweepTreasury0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x75619ab5 setDistributor0x7c9a07be holderPot0x8da5cb5b owner0x8f2216ca totalCreatorFees0x9f063efc afterAddLiquidity0xa7465bdb pairOf0xad091230 launches0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xb947efcb claimCreatorFees0xbfe10928 distributor0xc3095620 MOONBASE_BPS0xc45a0155 unknown0xc4e833ce getHookPermissions0xc5e153f7 feeBps0xce15e401 claimHolderPot0xd4552f3e register0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xe2b25bbf totalMoonbaseFees0xf0f44260 setTreasury0xf2fde38b transferOwnership