Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,326,497
0x9002…a0eC
The eight checks
3 pools use this hook, the first one 68 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.
- 02pass
What it takes from a swapIt takes 1% 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 switchOwned by 0xFBa6F44D5a091a329b882f56C1cd078db3041995. Owner-style functions: setFactory, transferOwnership.
- 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 record3 pools over 67 days.
Measured at block 93,326,497. 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 & 0x3fff0x20ec · 10000011101100
- 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.
WETH / djt
fee 0%- Swap WETH → djthook takes 1.00%
- Swap djt → WETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0xe7971d1a39e141c3523761537dc52b631a0d95d967cc7fb1d8d6109d154a87ea
WETH / MAGA
fee 0%- Swap WETH → MAGAhook takes 1.00%
- Swap MAGA → WETHhook takes 1%
- Add, then remove liquiditycame back whole
pool 0x2aed00084e9659fdf9ded18465019590ac2d7877c395e93a7f4b4dfc1a78dae4
Read from the bytecode
- Code size
- 4,878 bytes
- Owner
- 0xFBa6F44D5a091a329b882f56C1cd078db3041995
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 1
- 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.
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x283dc96f WEBSITE
- 0x575e24b4 beforeSwap
- 0x5bb47808 setFactory
- 0x6a8f7144
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 donate. Runs before a donation to LPs.
- 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.
hasExpectedHookPermissions
0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x79ba5097 acceptOwnership0x8da5cb5b owner0x9099bd3f BUY_TAX_BPS0x9f063efc afterAddLiquidity0xa3d80bae TWITTER0xac4e4054 REQUIRED_HOOK_FLAGS0xad1ad527 BRAND0xb235bf37 COALA_GENERATION0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc45a0155 unknown0xcdf456e1 baseAsset0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe1a45218 BPS_DENOMINATOR0xe1b4af69 afterDonate0xe30c3978 pendingOwner0xef00b94c poolTaxConfig0xf2fde38b transferOwnership0xfa02716d registerPool0xfd657856 SELL_TAX_BPS