Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,892,559
0xD2F7…00c0
The eight checks
432 pools use this hook, the first one 45 d ago.
- 01pass
Permissions that touch your moneyNone of the permissions that let a hook take from swaps or from LPs are switched on.
- 02pass
What it takes from a swapA swap through it pays the pool fee and nothing else.
- 03pass
LPs can get outLiquidity added and removed in the same block came back whole.
- 04pass
The fee is the feeA fixed fee of 1%, written in the pool key.
- 05pass
No one holds the switchNo owner and no admin functions found.
- 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 record432 pools over 44 days.
Measured at block 92,892,559. 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 & 0x3fff0x00c0 · 00000011000000
- 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.
HuntHunter / CRCL
fee 1%- Swap HuntHunter → CRCLnothing taken
- Swap CRCL → HuntHunternothing taken
- Add, then remove liquiditycame back whole
pool 0x7a7f9ca361eba1b70d707d5635e938b322697c869051cde543869740adbd5dad
SPY / OWNWALL
fee 1%- Swap SPY → OWNWALLnothing taken
- Swap OWNWALL → SPYnothing taken
- Add, then remove liquiditycame back whole
pool 0x1d3dd65bb17b90ff7f458dd35da03c168498b466c38b611d4f18e26411197c70
Read from the bytecode
- Code size
- 9,016 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 0
- 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.
- 0x02669b52 launchpad
- 0x0318d755 getQuote
- 0x0a0ef1b8 MAX_OBSERVATION_AGE
- 0x1e2cc944 buybackRouteProvisioningVersion
- 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 swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
- After swap. Runs after every swap.