Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,949,143
0xdC02…a0Cc
The eight checks
23 pools use this hook, the first one 41 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.
- 02n/a
What it takes from a swapNo pool with liquidity to swap through yet.
- 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%, written in the pool key.
- 05caution
No one holds the switchNo owner() but it has SWEEP_BOUNTY_BPS, sweep.
- 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 record23 pools over 41 days.
Measured at block 92,949,143. 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.
CASHCAT / CASHCOW
fee 0%- Swap CASHCAT → CASHCOWno liquidity at the current price
- Swap CASHCOW → CASHCATno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0x2d520bd6908ba00a7d6ad0a7d1cc84fa892849a59a6e639e24f71308974c3f1f
Read from the bytecode
- Code size
- 15,457 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
- 0x0885f732 poolConfig
- 0x11c7c48c MAX_OPENING_FEE_BPS
- 0x16eebd1e launcher
- 0x21d0ee70 beforeRemoveLiquidity
- 0x249d39e9 BPS
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
0x2af9febb platformRecipient0x2b733d55 SWEEP_BOUNTY_BPS0x2e9b72a4 unknown0x4618f461 checkGraduation0x575e24b4 beforeSwap0x5d8a77c4 unknown0x6a51329f unknown0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x71b01d99 unknown0x7c71b33f unknown0x811ec7da graduation0x85951786 sweep0x91dd7346 unlockCallback0x9f063efc afterAddLiquidity0x9f193a60 unknown0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xbdb89858 graduationProgressBps0xc4e833ce getHookPermissions0xc8f093ea pendingTokenFees0xcf78e967 unknown0xd55be8c6 MAX_FEE_BPS0xd7d35acf unknown0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1b4af69 afterDonate0xe5dd8c5e totalBurned0xe814a9b3 currentBuyFeeBps0xe8eecf07 unknown0xec0c94bd unknown0xf5164ba1 unknown