Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,979,893
0x6b9A…20cC
The eight checks
38 pools use this hook, the first one 89 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 1.00% on top of the pool fee.
- 03pass
LPs can get outLiquidity added and removed in the same block came back whole.
- 04pass
The fee is the feeA fixed fee of 0.30%, written in the pool key.
- 05caution
No one holds the switchNo owner() but it has setBurnPot, setFactory, setKeeper, setReferral, setRefDistributor, burnPot.
- 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 record38 pools over 89 days.
Measured at block 92,979,893. 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 & 0x3fff0x20cc · 10000011001100
- 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.
USDG / SOPHIE
fee 0.30%- Swap USDG → SOPHIEhook takes 1.00%
- Swap SOPHIE → USDGtoo little liquidity to measure
- Add, then remove liquiditycame back whole
pool 0xbf2727c0dd574672d10c95071a2f464b7bd43b58d252649b3b50226a13582c3f
Read from the bytecode
- Code size
- 16,430 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 20
- 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.
- 0x01099984 harvest
- 0x03fd2a45 DEAD
- 0x1441a5a9 referral
- 0x21d0ee70 beforeRemoveLiquidity
- 0x249d39e9 BPS
- 0x256e3cf0 accruedSnipe
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 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
0x2989a0c3 platformCutBps0x31f821d1 setBurnPot0x3a040d5a flushPlatform0x3ffd2c95 accruedLP0x4c111247 accruedRef0x4cad6a00 refDistributor0x4cf18224 register0x54d06f40 launchAt0x575e24b4 beforeSwap0x5bb47808 setFactory0x6b9a4b5b LP_BAND0x6c2bbe7e afterRemoveLiquidity0x6cc361ac processLP0x6fe7e6eb afterInitialize0x748747e6 setKeeper0x76d5b2d7 currentFeeBps0x78228f1d poolInitializer0x91dd7346 unlockCallback0x950eeea7 SNIPE_GUARD0x98f82680 accruedBuyback0x9b8a51a4 POT_SHARE_BPS0x9e5914da setReferral0x9f063efc afterAddLiquidity0xaa97e57b SNIPE_MAX_BPS0xaced1661 keeper0xb47b2fb1 afterSwap0xb5217bb4 pools0xb6a8b0fa beforeDonate0xba01c6d2 accruedTreasury0xc2d6523e distributeRef0xc393d4f2 setRefDistributor0xc45a0155 unknown0xc4e833ce getHookPermissions0xcbaa1a47 MIN_FEE_BPS0xccf52c4b flushTreasury0xcfc7f959 accruedPlatform0xd55be8c6 MAX_FEE_BPS0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xdd428d4d burnPot0xe1b4af69 afterDonate0xee460e24 processBuyback0xf5b91b7b usdg0xf851a440 admin0xfa2af9da platformWallet0xfcf7ed05 accruedUsdg