Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,361,901
0x8678…eACc
The eight checks
3 pools use this hook, the first one 47 d ago.
- 01caution
Permissions that touch your moneyThe address enables before remove liquidity, before swap returns delta, after 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.
- 03pass
LPs can get outLiquidity added and removed in the same block came back whole.
- 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 switchNo owner() but it has UPGRADE_INTERFACE_VERSION, setPlatformTreasury, setFeeVault, transferAdmin, upgradeToAndCall, setStockRegistry.
- 06fail
The code cannot changeIt is a proxy. The code that runs lives at 0xfe449C35AaA2A1f09552837C25eaE7b794d949CD.
- 07pass
Only the PoolManager can call itEach callback refused a call that did not come from the PoolManager.
- 08pass
Track record3 pools over 47 days.
Measured at block 93,361,901. 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 & 0x3fff0x2acc · 10101011001100
- 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.
DAPPE2E / PLTR
fee dynamic, now 0%- Swap DAPPE2E → PLTRno liquidity at the current price
- Swap PLTR → DAPPE2Eno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0x25849cc787fbb13a765196bfe0f3aa6b32308fcdd8b640301eb6c3db4df8221f
Read from the bytecode
- Code size
- 12,280 bytes
- Owner
- none found
- Proxy
- yes, code at 0xfe449C35AaA2A1f09552837C25eaE7b794d949CD
- DELEGATECALL
- present
- 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.
- 0xe138818c platformTreasury
- 0xe1b4af69 afterDonate
- 0xf851a440 admin
- 0xf8c8765e initialize
- 0xd1fd89c5 HOOK_PERMISSION_MASK
- 0xdbab5c65 stockRegistry
- 0xdc4c90d3
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 remove liquidity. Can refuse a withdrawal. LPs may not get out.
- 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.
poolManager
0xdc98354e beforeInitialize0xad3cb1cc UPGRADE_INTERFACE_VERSION0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc4e833ce getHookPermissions0x7cd86d60 setPlatformTreasury0x9f063efc afterAddLiquidity0xa591f97f setFeeVault0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x75829def transferAdmin0x76740637 stateProvider0x4f1ef286 upgradeToAndCall0x52d1902d proxiableUUID0x575e24b4 beforeSwap0x259982e5 beforeAddLiquidity0x26782247 pendingAdmin0x2cb54976 setStockRegistry0x478222c2 feeVault0x0e18b681 acceptAdmin0x11f70890 setStateProvider0x21d0ee70 beforeRemoveLiquidity