Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,327,275
0x3545…0044
The eight checks
3 pools use this hook, the first one 67 d ago.
- 01caution
Permissions that touch your moneyThe address enables after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
- 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.
- 04pass
The fee is the feeA fixed fee of 0.90%, written in the pool key.
- 05caution
No one holds the switchOwned by 0xe0c3F552f084068295661Dbdd9Ef3c057d39a205. Owner-style functions: transferOwnership.
- 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 67 days.
Measured at block 93,327,275. 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 & 0x3fff0x0044 · 00000001000100
- 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 / BMT
fee 0.90%- Swap ETH → BMTno liquidity at the current price
- Swap BMT → ETHno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0x201895a359bf4c9f3dce0288cbe4581828fc519c579b6497094ef1134da45b0d
Read from the bytecode
- Code size
- 5,371 bytes
- Owner
- 0xe0c3F552f084068295661Dbdd9Ef3c057d39a205
- 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.
- 0x21d0ee70 beforeRemoveLiquidity
- 0x225cf6e4 proposeTreasuryUpdate
- 0x259982e5 beforeAddLiquidity
- 0x2ed6b75d pendingTreasury
- 0x575e24b4 beforeSwap
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- After swap. Runs after every swap.
- After swap returns delta. Can take part of what you get out of every swap.
0x61d027b3
treasury
0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x79ba5097 acceptOwnership0x8da5cb5b owner0x8e43ca99 treasuryUpdateAvailableAt0x9099bd3f BUY_TAX_BPS0x91dd7346 unlockCallback0x968de9ab TREASURY_UPDATE_DELAY0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc4e833ce getHookPermissions0xd236b9c6 executeTreasuryUpdate0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xe30c3978 pendingOwner0xf2fde38b transferOwnership0xfc0c546a token0xfc656ac5 handleHookFees0xfd657856 SELL_TAX_BPS