Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,975,881
0x6dA2…20cc
The eight checks
19 pools use this hook, the first one 28 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 1.24% of each swap 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 0% now and can change.
- 05caution
No one holds the switchOwned by 0xEeFDEAeC85b1bb8B97130017aA7e23f5095b952d. Owner-style functions: setAnchors, setEthUsdFeed, setAccessRegistry, setEthUsd, setAuthorizedInitializer, claim.
- 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 record19 pools over 28 days.
Measured at block 92,975,881. 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.
ETH / CSMD
fee dynamic, now 0%- Swap ETH → CSMDhook takes 1.24%
- Swap CSMD → ETHhook takes 1.24%
- Add, then remove liquiditycame back whole
pool 0x7600f84be43e5dfd786fbb77012db7a2a6f30152087fa76348979e00c74eecfb
ETH / SOLO
fee dynamic, now 0%- Swap ETH → SOLOhook takes 1.24%
- Swap SOLO → ETHhook takes 1.24%
- Add, then remove liquiditycame back whole
pool 0x12d81ec0e46d96b0bf3601f3f6d3fd8b438060391abfdffe41808b16b3958015
Read from the bytecode
- Code size
- 15,432 bytes
- Owner
- 0xEeFDEAeC85b1bb8B97130017aA7e23f5095b952d
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 18
- 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.
- 0x12076747 setAnchors
- 0x16994960 anchorAt
- 0x19decb41 keeperWallet
- 0x2161915c unclaimed
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
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.