Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 92,972,620
0x24f9…68cc
The eight checks
28 pools use this hook, the first one 88 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.
- 03n/a
LPs can get outClosed to outside LPs: only the hook's own liquidity is in the pool.
- 04caution
The fee is the feeIts pools use a dynamic fee that the hook sets before every swap. It stands at 0% now and can change.
- 05caution
No one holds the switchOwned by 0x45d3Bf592E48ff04514Fe2F7dD257392B4d67ddd. Owner-style functions: withdrawPlatformFees, setAntiSnipeDefaults, claimRefund, claimCreatorFees, setFeeRecipient, collectPoolFees.
- 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 record28 pools over 87 days.
Measured at block 92,972,620. 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 & 0x3fff0x28cc · 10100011001100
- 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.
SLV / DRKSLV
fee dynamic, now 0%- Swap SLV → DRKSLVhook takes 1.00%
- Swap DRKSLV → SLVno liquidity above the price
- Add, then remove liquiditydeposit refused: curve phase
pool 0x337dc967e846b8653eaeee51f3737567c7308b9b95bcaa676c70631b47f1ef0e
Read from the bytecode
- Code size
- 39,157 bytes
- Owner
- 0x45d3Bf592E48ff04514Fe2F7dD257392B4d67ddd
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 43
- 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.
- 0xec3889b5 withdrawPlatformFees
- 0xedff74d0 GRAD_RAISE
- 0xf07e96b3 lastActivity
- 0xfcba2b29 lockFeeRecipient
- 0xffc8cc53 SQRT_START_C0
- 0xdf1b80ae lockFeeRecipientTo
- 0xdf7787a4 MAX_WALLET
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 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.
- 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.