Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,972,251
0xaEc2…2044
The eight checks
20 pools use this hook, the first one 41 d ago.
- 01caution
Permissions that touch your moneyThe address enables 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 1.50% of each swap 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%, written in the pool key.
- 05caution
No one holds the switchNo owner() but it has claimable, 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 record20 pools over 41 days.
Measured at block 92,972,251. 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 & 0x3fff0x2044 · 10000001000100
- 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 / PICKLES
fee 0%- Swap ETH → PICKLEShook takes 1.50%
- Swap PICKLES → ETHhook takes 1.50%
- Add, then remove liquiditycame back whole
pool 0xbb6d260df651daaf0b44ba7d9961aa27fa3cea0b2d7474c38436198471160520
ETH / BUILD
fee 0%- Swap ETH → BUILDhook takes 1.50%
- Swap BUILD → ETHhook takes 1.50%
- Add, then remove liquiditycame back whole
pool 0xa52a30968a379721617834cefc31f017aa2c1c524fd6a659ca086afed6d7499a
Read from the bytecode
- Code size
- 6,655 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 3
- 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.
- 0xd4570c1c claimable
- 0xdc98354e beforeInitialize
- 0xdd1b9c4a POOL_FEE
- 0xe1b4af69 afterDonate
- 0xbe378228 PROTOCOL_FEE_BPS
- 0xc45a0155 unknown
- 0xcc3cbd2a
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 swap. Runs after every swap.
- After swap returns delta. Can take part of what you get out of every swap.
CREATOR_FEE_BPS
0xcfde68dc totalLiability0xa3f4bac7 ALL_HOOK_MASK0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xb7581ae1 BUY_SURCHARGE_WINDOW0x7f7464c7 BUY_SURCHARGE_BPS0x941f5d25 protocolRecipient0x9f063efc afterAddLiquidity0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x7286e5e5 registerPool0x7b2a03ba factoryRuntimeHash0x4fb0c1e8 PERMISSION_MASK0x575e24b4 beforeSwap0x62308e85 POOL_MANAGER0x69fbdeb1 AFTER_SWAP_RETURNS_DELTA_FLAG0x259982e5 beforeAddLiquidity0x3d34106d AFTER_SWAP_FLAG0x4586223d poolForToken0x46ca626b TICK_SPACING0x0686a64d BEFORE_INITIALIZE_FLAG0x1e83409a claim0x21d0ee70 beforeRemoveLiquidity