RubickHook on Ethereum

Uniswap v4 Hook Contract 0xeef6bfe24769184ef354f0d0c707b62324f050c0 on Ethereum · Other · Verified contract

Volume (24h)
$3.59K
Value locked (TVL)
$5.83
All-time volume
$3.59K
Pools using this hook
1
Swaps (24h)
40 (20 traders)
Total swaps
40

What it does

A Uniswap v4 dynamic-fee hook that tracks a virtual Rubik's cube per pool, where each sufficiently large swap turns the cube and the top-face colors set the next swap's LP fee, with solving the cube granting a temporary low-fee window.

How it works step by step

  • Initializes each pool with a 25-move pseudo-random scramble of a packed 3x3 cube and requires the pool to use a dynamic fee.
  • Sets the LP fee on every swap to the average fee tier of the nine U-face stickers, with each color mapped to a fee tier.
  • Turns one face per qualifying swap: zeroForOne swaps turn clockwise and the others counter-clockwise, with the face chosen pseudo-randomly unless the swapper supplies a move in hookData.
  • Records the player who solves the cube as lastSolver, sets a golden hour of GOLDEN_FEE for goldenBlocks blocks and rescrambles the cube.
  • Ignores swaps below minMoveAmount so dust swaps cannot steer the cube.
Swap behaviour
beforeSwap sets the LP fee to GOLDEN_FEE during a golden hour or to the average U-face color fee otherwise. afterSwap turns the cube for swaps of at least minMoveAmount, emitting Rotated, and if the cube is solved it emits Solved, starts a golden hour and rescrambles with Scrambled.
Liquidity behaviour
No liquidity callbacks.
Fee behaviour
Dynamic fee overridden on every swap: the fee is GOLDEN_FEE (0.01%) during a golden hour, otherwise the average of the nine U-face sticker color fee tiers (white 0.05%, red 1.00%, green 0.30%, yellow 0.10%, orange 0.75%, blue 0.50%). Fees are not shared with any party.
Owner & admin controls
No admin controls found. No owner, pause, upgrade or parameter setter in the ABI; minMoveAmount and goldenBlocks are immutable constructor parameters.

Enabled Uniswap v4 callbacks

afterInitialize, beforeSwap, afterSwap

afterInitialize: requires the pool to use a dynamic fee and scrambles the cube for the new pool. beforeSwap: returns the current cube-derived LP fee with the override flag. afterSwap: applies one cube turn for swaps whose size is at least minMoveAmount, and handles solve detection and rescrambling.

Security & trust assessment

Risk level: low (verified source, high confidence).

Who controls it: No privileged key is present in the source, so no single party can alter fees, pause swaps or move funds. Outcomes depend on block.prevrandao and block.timestamp, which validators can influence to a limited degree.

Risk to user funds: The hook does not hold, move or take tokens (beforeSwapReturnDelta and afterSwapReturnDelta are disabled) and has no pause or withdrawal path. Swaps only pay a fee that is set by the cube state, so user funds are exposed only through the fee level and the pool's own liquidity.

Security findings

  • [medium] Predictable pseudo-randomness for scrambles and auto moves: The cube move and scramble seeds use block.prevrandao and block.timestamp, which proposers can influence. A proposer could bias which face turns and when a cube is solved, letting them capture the golden hour fee and solver record.
  • [low] Golden hour can be targeted by searchers: Solving the cube sets a golden hour of 0.01% fees for goldenBlocks blocks. Searchers can attempt to plan the solving swap, using hookData to pick the exact move and monopolise the cheap-fee window.
  • [info] Solver attribution comes from user-supplied hookData: Solving records msg.sender-derived player data from hookData without authentication; the solver field can be set by the caller to any address, so solver attribution is spoofable.
  • [info] No custody of user funds: The hook never takes or holds tokens, uses no return deltas and is not upgradeable, so it cannot custody or block pool funds.

Contract details

Verified source
Yes (RubickHook)
Compiler
solc 0.8.26+commit.8a97fa7a
Bytecode size
6,850 bytes
Upgradeable proxy
No
Detected patterns
dynamic-fee

Pools using RubickHook