Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,271,533
0x6df4…9044
The eight checks
4 pools use this hook, the first one 75 d ago.
- 01caution
Permissions that touch your moneyThe address enables after swap returns delta. The hook is allowed to take; the next two checks measure whether it does.
- 02caution
What it takes from a swapIt takes 4% of each swap 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 0.30%, written in the pool key.
- 05caution
No one holds the switchNo owner() but it has setRegistry, transferAdmin, transferLaunchOperator.
- 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 record4 pools over 74 days.
Measured at block 93,271,533. 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 & 0x3fff0x1044 · 01000001000100
- 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 / CHILLGUY
fee 0.30%- Swap ETH → CHILLGUYhook takes 1%
- Swap CHILLGUY → ETHhook takes 4%
- Add, then remove liquiditycame back whole
pool 0x10f49a0957580769ed86ab188be9d3e4763061e4276ad55d2da6a3b600ca9e2e
ETH / CHILLGUY
fee 0.30%- Swap ETH → CHILLGUYhook takes 1%
- Swap CHILLGUY → ETHhook takes 4%
- Add, then remove liquiditycame back whole
pool 0x502a6ee8520a370f7e1739f7f42596ff50db1c3b1bf4465bb887e573c166d384
Read from the bytecode
- Code size
- 9,547 bytes
- Owner
- none found
- Proxy
- no
- DELEGATECALL
- absent
- SELFDESTRUCT
- absent
- Outside calls
- 2
- 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.
- 0xe1b4af69 afterDonate
- 0xf4364515 BUY_FEE_BPS
- 0xf851a440 admin
- 0xff94e4f3 creatorOf
- 0xb6a8b0fa beforeDonate
- 0xdc4c90d3 poolManager
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.
- After swap. Runs after every swap.
- After swap returns delta. Can take part of what you get out of every swap.
0xdc98354e
beforeInitialize
0x803db96d protocolTreasury0x83a79a67 POST_GRADUATION_FEE_BPS0x92822047 PROTOCOL_SHARE_BPS0x9f063efc afterAddLiquidity0xa91ee0dc setRegistry0xb47b2fb1 afterSwap0x575e24b4 beforeSwap0x577fd270 launchOperator0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x75829def transferAdmin0x7b103999 registry0x0822cc09 registerCreator0x0d157cba transferLaunchOperator0x21d0ee70 beforeRemoveLiquidity0x259982e5 beforeAddLiquidity0x479dfd7b CREATOR_SHARE_BPS0x5299bb42 EARLY_SELL_FEE_BPS