Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,974,342
0x59D6…A8cc
The eight checks
21 pools use this hook, the first one 80 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.
- 02caution
What it takes from a swapIt takes 2.00% of each swap on top of the pool fee.
- 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 before every swap. It stands at 0% now and can change.
- 05caution
No one holds the switchOwned by 0x03a51c090dE3adb64D2CE589f992C099cE49bB78. Owner-style functions: setOwner, collectPoolFees, setFeeRecipient, claimCreatorFees, setMarketConfig, setKeeperGasPolicy.
- 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 record21 pools over 79 days.
Measured at block 92,974,342. 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 / STONKFAMIL
fee dynamic, now 0%- Swap ETH → STONKFAMILhook takes 2.00%
- Swap STONKFAMIL → ETHno liquidity above the price
- Add, then remove liquiditydeposit refused: curve phase
pool 0x06cd4bc9f67f69325d1b49d504f138dbfc3304eb161c8e50a687bfefd28ec123
ETH / FAMILY
fee dynamic, now 0%- Swap ETH → FAMILYhook takes 2.00%
- Swap FAMILY → ETHno liquidity above the price
- Add, then remove liquiditydeposit refused: curve phase
pool 0x37a67bbbbe35596220408318132e9350bb137cf549742af2f2f33dd1a4ade0d2
Read from the bytecode
- Code size
- 36,570 bytes
- Owner
- 0x03a51c090dE3adb64D2CE589f992C099cE49bB78
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 44
- 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.
- 0x0200737f GRADUATION_GAS
- 0x03d60c01 FULL_TICK_LOWER
- 0x042549d8 flushTreasury
- 0x06ae7095 marketFactory
- 0x0a3b3078 firstHourBought
- 0x0b7e8310 underlyingQuote
- 0x0d7a94f6 quoteBuy
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.