Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,973,974
0xDfd4…00Cc
The eight checks
19 pools use this hook, the first one 67 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 1.00% 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 0x4e59b44847b379578588920cA78FbF26c0B4956C. Owner-style functions: claimFees, claimAllFees, setAntiSnipe, claimable, setDeployerDump, 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 record19 pools over 67 days.
Measured at block 92,973,974. 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 & 0x3fff0x00cc · 00000011001100
- 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 / GCAT
fee 0%- Swap ETH → GCAThook takes 1.00%
- Swap GCAT → ETHno liquidity above the price
- Add, then remove liquiditycame back whole
pool 0x2464244e08561ab234e55aed7a6a5ab66dcb159f10941b04e78c639450f46d05
Read from the bytecode
- Code size
- 7,030 bytes
- Owner
- 0x4e59b44847b379578588920cA78FbF26c0B4956C
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 4
- 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.
- 0x012374c9 tokenParams
- 0x15a0ea6a claimFees
- 0x328ebc13 snipeWindowBuyVolume
- 0x4fbc1f67 deployerDumpDays
- 0x534a8465 trustScore
- 0x575e24b4 beforeSwap
- 0x5902a869
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.
- 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.
MAX_CREATOR_TAX
0x6637e38c BPS_DENOM0x67a6c440 SWAP_FEE_BPS0x6fbfa86f antiSnipeExtraBps0x715018a6 renounceOwnership0x79ba5097 acceptOwnership0x7f635cc0 MAX_TOTAL_FEE0x8a5f443b totalBuyVolume0x8da5cb5b owner0x96958b8f claimAllFees0xb47b2fb1 afterSwap0xb5f2d80b registerToken0xbc99b6cd deployerSellVolume0xbe9ca9e1 totalSellVolume0xc45a0155 unknown0xc4e833ce getHookPermissions0xd1759e6c setAntiSnipe0xd4570c1c claimable0xdc4c90d3 poolManager0xe30c3978 pendingOwner0xeb241b2e antiSnipeBlocks0xecdfeca8 setDeployerDump0xf2fde38b transferOwnership0xfed6bc07 deployerDumpExtraBps