Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,206,518
0xdF4F…f0cc
The eight checks
5 pools use this hook, the first one 83 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.
- 02pass
What it takes from a swapIt takes 1% 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 1% now and can change.
- 05caution
No one holds the switchNo owner() but it has updateBeneficiary.
- 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 82 days.
Measured at block 93,206,518. 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 & 0x3fff0x30cc · 11000011001100
- 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.
T7T / SPY
fee dynamic, now 1%- Swap T7T → SPYno liquidity below the price
- Swap SPY → T7Thook takes 1.00%
- Add, then remove liquiditycame back whole
pool 0x5f92054ed887f3f3e58a63f9127f0382670694d52276b59ac4dd26cc0d43e9e9
T5T / SPY
fee dynamic, now 1%- Swap T5T → SPYhook takes 1%
- Swap SPY → T5Thook takes 1.00%
- Add, then remove liquiditycame back whole
pool 0x91bf7706af34cf7dfaf106b74fca5c0e572c4fdbc36a3eaa3c0f7b06c6128587
Read from the bytecode
- Code size
- 15,819 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.
- 0x037aadbe getPoolConfig
- 0x0e15a2be totalTreasuryRawSpyAccrued
- 0x12a70ae3 totalRawSpyFeesAccrued
- 0x15424b08 INITIAL_TICK
- 0x1802f794 totalTreasuryRawSpySwept
- 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.
- After initialize. Runs once, right after a pool is created.
- 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
0x2a90c591 spy0x2c1de23c beneficiaryController0x2c23003d registerPool0x3ae6646c pendingBuybackRawSpy0x46ca626b TICK_SPACING0x575e24b4 beforeSwap0x5e3f2727 LP_FEE0x6c2bbe7e afterRemoveLiquidity0x6f66681f pendingTreasuryRawSpy0x6fe7e6eb afterInitialize0x70e9d244 feeLocker0x7249d9d9 updateBeneficiary0x906913de pendingBeneficiaryTotalRawSpy0x91dd7346 unlockCallback0x9f063efc afterAddLiquidity0xa0e62eb9 poolIdForToken0xb3dbac77 flushProtocolFees0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xb86d5298 module0xc4e833ce getHookPermissions0xd012965b totalBuybackRawSpyAccrued0xd08f41dc pendingBeneficiaryRawSpy0xd2ab6919 flushPoolFees0xd361c80e totalBuybackRawSpySwept0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xdcde388f operatingTreasury0xe1b4af69 afterDonate0xf1f5c993 buybackVault