Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,239,485
0x8b2C…E840
The eight checks
4 pools use this hook, the first one 86 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.
- 04pass
The fee is the feeA fixed fee of 1%, written in the pool key.
- 05caution
No one holds the switchOwned by 0xA1BEc7917d9830bE664454d6b87511886279d013. Owner-style functions: setTreasury, transferOwnership, setRouter, claimCreatorFees, collectLpFees, withdrawProtocolFees.
- 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 85 days.
Measured at block 93,239,485. 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 & 0x3fff0x2840 · 10100001000000
- 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 / D
fee 1%- Swap ETH → Dnothing taken
- Swap D → ETHnothing taken
- Add, then remove liquiditydeposit refused: LiquidityLockedPreBond
pool 0xfb7801cefc4ad452acb4a89212fd5aced210a87785e2016617c50f1d29c87061
Read from the bytecode
- Code size
- 22,148 bytes
- Owner
- 0xA1BEc7917d9830bE664454d6b87511886279d013
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 22
- 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.
- 0xf0f44260 setTreasury
- 0xf2fde38b transferOwnership
- 0xf887ea40 router
- 0xdcee10db curveProgress
- 0xdd1b9c4a POOL_FEE
- 0xefbe8fd1 createToken
- 0xc0d78655 setRouter
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.
- Before add liquidity. Can refuse a deposit, or only let some addresses provide liquidity.
- After swap. Runs after every swap.