Reading the hook.
The address, the bytecode, then a swap each way through its pool. A few seconds.
v4 hook · Robinhood Chain · block 93,459,581
0x4193…E0Cc
The eight checks
1 pool use this hook, the first one 22 h 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.
- 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.
- 04pass
The fee is the feeA fixed fee of 0%, written in the pool key.
- 05caution
No one holds the switchNo owner() but it has transferFrom, transfer, 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.
- 08caution
Track record1 pool, first seen 0 days ago.
Measured at block 93,459,581. 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 & 0x3fff0x20cc · 10000011001100
- 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 / test
fee 0%- Swap ETH → testno liquidity at the current price
- Swap test → ETHno liquidity at the current price
- Add, then remove liquiditycame back whole
pool 0x236a77ab84e154b724bd6b433d403b33e3373cbc8bd37b97b60b44a9a706a05a
Read from the bytecode
- Code size
- 8,093 bytes
- Owner
- none found
- 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.
- 0x01ea805d trays
- 0x02a1f4d3 HOME_TICK_SPACING
- 0x03ee438c metadataURI
- 0x06fdde03 name
- 0x095ea7b3 approve
- 0x18160ddd totalSupply
- 0x1ec5415a tray
- 0x2010c2c4
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 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.
TRAY_DRAFTER
0x2044f09f TOLL_MIN_BPS0x21d0ee70 beforeRemoveLiquidity0x23b872dd transferFrom0x259982e5 beforeAddLiquidity0x26c671c2 tollBps0x313ce567 decimals0x575e24b4 beforeSwap0x644529ce tollDrawn0x69b3c9b4 plotter0x6c2bbe7e afterRemoveLiquidity0x6fe7e6eb afterInitialize0x70a08231 balanceOf0x715018a6 renounceOwnership0x75f38d18 TOLL_MAX_BPS0x7a1a61f5 bearerOf0x7cd3229a board0x8820ac8a inked0x8da5cb5b owner0x91dd7346 unlockCallback0x9492c875 TRAY_COMMONS0x95d89b41 symbol0x988bbb0f creditsBps0x9f063efc afterAddLiquidity0xa4c07267 TRAY_STUDIO0xa9059cbb transfer0xb47b2fb1 afterSwap0xb6a8b0fa beforeDonate0xc001b009 TRAY_DESK0xc12b293c desk0xc4e833ce getHookPermissions0xca7ee8a0 studio0xd8f78cda draw0xdba6f2d9 drafter0xdc4c90d3 poolManager0xdc98354e beforeInitialize0xdd62ed3e allowance0xe1b4af69 afterDonate0xecc35230 tollCollected0xf291cac1 REEL0xf2fde38b transferOwnership0xfb72f6d3 commons