Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,035,654
0xc937…A8cC
The eight checks
11 pools use this hook, the first one 76 d ago.
- 01caution
Permissions that touch your moneyThe address enables before swap returns delta, 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.
- 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 0%, written in the pool key.
- 05caution
No one holds the switchNo owner() but it has setMarketerShareBps, withdraw, setMaxCreatorFeeBps, setMarketer, setReferralShareBps, 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 record11 pools over 76 days.
Measured at block 93,035,654. 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 & 0x3fff0x28cc · 10100011001100
- 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 / CANON
fee 0%- Swap ETH → CANONno liquidity at the current price
- Swap CANON → ETHno liquidity at the current price
- Add, then remove liquiditydeposit refused: LiquidityIsPermanentlyLocked
pool 0xf864804b573b3c62947b08469b8ad1d2d8dd70f954e0650a6df8cb10bdccacb5
Read from the bytecode
- Code size
- 12,330 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 7
- 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.
- 0x04e8805c totalFeeBps
- 0x06af71ac MIN_REWARD_SHARE_BPS
- 0x07ef2190 poolConfigs
- 0x0a3c0856 maxCreatorFeeBps
- 0x13298abb HARD_MAX_REFERRAL_SHARE_BPS
- 0x21d0ee70 beforeRemoveLiquidity
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.
- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
- After swap. Runs after every swap.
- Before swap returns delta. Can take part of what you put into a swap, or change how much is swapped.
- After swap returns delta. Can take part of what you get out of every swap.
0x259982e5
beforeAddLiquidity
0x272777cb setMarketerShareBps0x31d7a262 pendingRewards0x3b963090 marketerShareBps0x3ccfd60b withdraw0x4544a697 registerPool0x47c9bc2d referralShareBps0x575e24b4 beforeSwap0x59248472 setMaxCreatorFeeBps0x615a604f setMarketer0x61d027b3 treasury0x680686b7 ethOwed0x68b9013c marketer0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x91dd7346 unlockCallback0x9f063efc afterAddLiquidity0xae7ee02c HARD_MAX_CREATOR_FEE_BPS0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbe378228 PROTOCOL_FEE_BPS0xc45a0155 unknown0xc4e833ce getHookPermissions0xc7b31205 flushRewards0xd07e995b setReferralShareBps0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xf0f44260 setTreasury