Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,297,710
0x5D32…aAec
The eight checks
4 pools use this hook, the first one 12 d ago.
- 01caution
Permissions that touch your moneyThe address enables before remove liquidity, before swap returns delta, after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
- 02fail
What it takes from a swapOne direction works and the other is refused (PartialFillNotAllowed). You may be able to buy and not sell.
- 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 setSnipeTax, transferAdmin, setMaxCreatorTax, setBaseFee.
- 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 12 days.
Measured at block 93,297,710. 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 & 0x3fff0x2aec · 10101011101100
- 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 / DATEST
fee 0%- Swap ETH → DATESThook takes 1%
- Swap DATEST → ETHhook takes 1%
- Add, then remove liquiditydeposit refused: OnlySeedAdd
pool 0xab6eb353b2486c306dba5b3fca4f3d44a7fe05514889101257c19f16a7e93a1e
SPCX / HHHHH
fee 0%- Swap SPCX → HHHHHhook takes 3.00%
- Swap HHHHH → SPCXrefused: PartialFillNotAllowed
- Add, then remove liquiditydeposit refused: OnlySeedAdd
pool 0xae6385ae6f75bc669b1720ab5222d727a604a847d34a315f7be5fa23761ec915
Read from the bytecode
- Code size
- 18,508 bytes
- Owner
- none found
- 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.
- 0x01c5a0fa ROUTER_DELAY
- 0x02669b52 launchpad
- 0x03fd2a45 DEAD
- 0x060a210d MAX_STEADY_PIPS
- 0x0cb6d537 snipeWindow
- 0x0e18b681 acceptAdmin
- 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 remove liquidity. Can refuse a withdrawal. LPs may not get out.
- 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 donate. Runs before a donation to LPs.
- 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.