Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,206,171
0x9265…9AcC
The eight checks
5 pools use this hook, the first one 36 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 swapEvery swap through it was refused: TradingWindowClosed. Only an approved router may get through.
- 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 switchNo owner() but it has sweepFees.
- 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 record5 pools over 36 days.
Measured at block 93,206,171. 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 & 0x3fff0x1acc · 01101011001100
- 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.
Tts / SPY
fee dynamic, now 0%- Swap Tts → SPYrefused: TradingWindowClosed
- Swap SPY → Ttsrefused: TradingWindowClosed
- Add, then remove liquiditydeposit refused: LiquidityLocked
pool 0xb54b28e88a1fc8a70733251370a070ef63b508a4466959291e2939323706ca7d
SAPPL / AAPL
fee dynamic, now 0%- Swap SAPPL → AAPLrefused: TradingWindowClosed
- Swap AAPL → SAPPLrefused: TradingWindowClosed
- Add, then remove liquiditydeposit refused: LiquidityLocked
pool 0xf15ebc301dd27bf847f970822242cc9f342c8bf21061ab181c3ee3c481d672ed
Read from the bytecode
- Code size
- 19,018 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 13
- 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.
- 0x01785603 pendingFees
- 0x01dd00ce deepenSelf
- 0x0a87f148 MAX_TRADE_FEE
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x28ff1d4c MAX_LAUNCH_FEE
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- After initialize. Runs once, right after 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 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.