Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,328,969
0xb895…c0c0
The eight checks
3 pools use this hook, the first one 97 d ago.
- 01pass
Permissions that touch your moneyNone of the permissions that let a hook take from swaps or from LPs are switched on.
- 02caution
What it takes from a swapIt takes 1.25% of each swap on top of the pool fee.
- 03pass
LPs can get outLiquidity added and removed in the same block came back whole.
- 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 switchNo owner() but it has claimProtocolFees, transferCreatorRole, claimCreatorFees, setCreatorPayout, setInitialPayout.
- 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 97 days.
Measured at block 93,328,969. 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 & 0x3fff0x00c0 · 00000011000000
- 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 / TsunamiSZN3
fee dynamic, now 0%- Swap ETH → TsunamiSZN3hook takes 1.25%
- Swap TsunamiSZN3 → ETHhook takes 1.25%
- Add, then remove liquiditycame back whole
pool 0xd2c7c7432513dba2bf7e3be65b9872c49ead423e8002657b4c19b398ccf4f0a8
ETH / TsunamiSZN
fee dynamic, now 0%- Swap ETH → TsunamiSZNhook takes 1.25%
- Swap TsunamiSZN → ETHhook takes 1.25%
- Add, then remove liquiditycame back whole
pool 0x50a2275e7446bd780a5155f947b87b0eab910f002ff65dd47554da548f098e7e
Read from the bytecode
- Code size
- 12,849 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 1
- 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.
- 0xdc98354e beforeInitialize
- 0xe1b4af69 afterDonate
- 0xf6c00927 getPool
- 0xff94e4f3 creatorOf
- 0xd3fd6631 markGraduated
- 0xd7b96d4e locker
- 0xdc4c90d3
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
- After swap. Runs after every swap.
poolManager
0xc5e153f7 feeBps0xcbf89ac9 claimProtocolFees0xcee5eb2e graduationThreshold0xbf333f2c FEE_BPS0xc45a0155 unknown0xc4e833ce getHookPermissions0xb6a8b0fa beforeDonate0xbb443aeb feeBpsForMc0xbdb89858 graduationProgressBps0xb21b6342 assignedFloorOf0xb47b2fb1 afterSwap0xb6905a10 transferCreatorRole0xa6ae3031 POST_GRAD_FEE_BPS0xaed6d9a1 SNIPE_MAX_BUY0xaf8d60b5 claimCreatorFees0x902d55a5 TOTAL_SUPPLY0x9bbf0d58 MAX_EVER_ASSIGNED0x9f063efc afterAddLiquidity0x803db96d protocolTreasury0x853709e0 unclaimedFees0x8549d9be REQUIRED_FLAGS0x6fe7e6eb afterInitialize0x7b467390 MAX_CREATOR_PAYOUT_WALLETS0x7e20340a SNIPE_WINDOW_BLOCKS0x65d7b483 poolIdOfToken0x6c2bbe7e afterRemoveLiquidity0x6f9fab78 getCreatorPayout0x575e24b4 beforeSwap0x597ed96a setCreatorPayout0x5ed53fad POST_GRAD_LP_FEE_PIPS0x5315769b graduationReady0x533b5b9a registerPool0x56bf5ddc creatorBps0x2721b788 isGraduated0x3f308a7f setInitialPayout0x4beff463 assignedRecipients0x1f14900a pendingSplitBps0x21d0ee70 beforeRemoveLiquidity0x259982e5 beforeAddLiquidity0x03288707 accumulatedEth0x0a5294e9 marketCap0x18bce47b creatorBpsForMc