Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,241,918
0xB046…1888
The eight checks
5 pools use this hook, the first one 33 d ago.
- 01caution
Permissions that touch your moneyThe address enables before 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.
- 03n/a
LPs can get outClosed to outside LPs: only the hook's own liquidity is in the pool.
- 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 updateConfiguration, collectProtocolFee, collectCuratorFee.
- 06caution
The code cannot changeThe bytecode contains DELEGATECALL.
- 07pass
Only the PoolManager can call itEach callback refused a call that did not come from the PoolManager.
- 08pass
Track record5 pools over 33 days.
Measured at block 93,241,918. 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 & 0x3fff0x1888 · 01100010001000
- 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.
nw-sNUKE / PT-nw-sNUKE@1/
fee 0%- Swap nw-sNUKE → PT-nw-sNUKE@1/no liquidity at the current price
- Swap PT-nw-sNUKE@1/ → nw-sNUKEno liquidity at the current price
- Add, then remove liquiditydeposit refused: CustomCurveHook_LiquidityOnlyViaHook
pool 0xb990e4211403fe9a2c66724a63630d0cbff2272bdf0bced8cd9feab8b53c1d19
Read from the bytecode
- Code size
- 23,988 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- present
- SELFDESTRUCT
- absent
- Outside calls
- 26
- 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.
- 0x18d00219 removeLiquidity
- 0x1e2eaeaf extsload
- 0x21d0ee70 beforeRemoveLiquidity
- 0x230c2dd9 getTotalBalances
- 0x259982e5 beforeAddLiquidity
- 0x35fd631a
bit 4
After donate
bit 3Before swap returns deltabit 2After swap returns deltabit 1After add returns deltabit 0After remove returns delta- After initialize. Runs once, right after a pool is created.
- Before add liquidity. Can refuse a deposit, or only let some addresses provide liquidity.
- Before swap. Runs before every swap. On a dynamic-fee pool it can set the fee each time.
- Before swap returns delta. Can take part of what you put into a swap, or change how much is swapped.
extsload
0x526765e6 deploy0x575e24b4 beforeSwap0x60b014bf updateConfiguration0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x7e710e5c collectProtocolFee0x8652edf9 poolKeyOf0x881b86ed increaseObservationsCardinalityNext0x8a9e1a66 addLiquidity0x91dd7346 unlockCallback0x95832897 i_accessManager0x9f063efc afterAddLiquidity0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xb77b47a9 i_factory0xc4e833ce getHookPermissions0xdbd035ff extsload0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xde6fc0f8 unwindVault0xe1b4af69 afterDonate0xf96f97f2 observe0xfbd7e1da collectCuratorFee0xffa1ad74 VERSION