Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,329,193
0x73bd…5a80
The eight checks
3 pools use this hook, the first one 97 d ago.
- 01caution
Permissions that touch your moneyThe address enables before remove liquidity. The hook is allowed to take; the next two checks measure whether it does.
- 02fail
What it takes from a swapEvery swap through it was refused: error 0x28f84aea. Only an approved router may get through.
- 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 1%, written in the pool key.
- 05caution
No one holds the switchOwned by 0xA8B457F213fDd6929344e40617F1DBa2090e577F. Owner-style functions: claim, setPaused, setPlatformTreasury, claimable, transferOwnership, transferFrom.
- 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 96 days.
Measured at block 93,329,193. 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 & 0x3fff0x1a80 · 01101010000000
- 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.
dgnBTC3L / TEST
fee 1%- Swap dgnBTC3L → TESTrefused: error 0x28f84aea
- Swap TEST → dgnBTC3Lrefused: error 0x28f84aea
- Add, then remove liquiditydeposit refused: ExternalLiquidityNotAllowed
pool 0x2d3ed758034d51e4ea19d2001e464ba1a37003e08700acb0c32c68016a517625
dgnBTC3L / V4F4519C4C
fee 1%- Swap dgnBTC3L → V4F4519C4Crefused: error 0x28f84aea
- Swap V4F4519C4C → dgnBTC3Lrefused: error 0x28f84aea
- Add, then remove liquiditydeposit refused: ExternalLiquidityNotAllowed
pool 0x5e25e3352e59431562a00d10048ee0de77c0fce8de771793031ee25bd1b94041
Read from the bytecode
- Code size
- 23,367 bytes
- Owner
- 0xA8B457F213fDd6929344e40617F1DBa2090e577F
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 19
- 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.
- 0x0815fed0 swapsPaused
- 0x0a1be092 unknown
- 0x1e83409a claim
- 0x21d0ee70 beforeRemoveLiquidity
- 0x259982e5 beforeAddLiquidity
- 0x3bc340c2 launchesPaused
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 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.
0x48a5ddb0
unknown
0x4e627e62 referralRegistry0x575e24b4 beforeSwap0x6426be48 setPaused0x654988cd unknown0x69c25bf5 unknown0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x715018a6 renounceOwnership0x72d912c7 harvestFees0x79ba5097 acceptOwnership0x7cd86d60 setPlatformTreasury0x86630db4 quoteCurrencies0x8da5cb5b owner0x91dd7346 unlockCallback0x9b9eadab unknown0x9d193cd4 defaultSupply0x9f063efc afterAddLiquidity0xa0e62eb9 poolIdForToken0xad091230 launches0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xb9be5292 unknown0xc4e833ce getHookPermissions0xd4570c1c claimable0xd7626375 unknown0xda63ef4c quoteCurrencyCount0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xe138818c platformTreasury0xe1b4af69 afterDonate0xe30c3978 pendingOwner0xefb05f14 unknown0xf2fde38b transferOwnership0xfb7a6367 unknown0x06fdde03 name0x095ea7b3 approve0x18160ddd totalSupply0x23b872dd transferFrom0x313ce567 decimals0x70a08231 balanceOf0x95d89b41 symbol0xa9059cbb transfer0xc5a1d7f0 metadataHash0xdd62ed3e allowance