BinHookV2

A trading tax hook. It takes a cut of every trade, stops liquidity being added directly and creates its pools itself.

• Takes a cut of every trade

  On top of the normal pool fee, it keeps a share of each trade.

  The code that does this (beforeSwap):

  function beforeSwap(address sender, PoolKey calldata key, SwapParams calldata params, bytes calldata)
      external
      onlyPoolManager
      returns (bytes4, BeforeSwapDelta, uint24)
  {
      // No swaps while addLiquidity / removeLiquidity is running.
      if (_locked()) revert Reentrancy();
  
      PoolId id = key.toId();
      // One BinSwap event per bin traded is emitted on the way.
      (SwapState memory s, PoolSlot memory slot) = _swap(_pools[id], id, key, params);
  
      // `slot` is the pool as the swap found it, with the volatility values as the swap leaves them: its
      // `activeBin` is still the bin the swap started in.
      emit Swap(
          id,
          sender,
          s.zeroForOne,
          s.amountIn,
          s.amountOut,
          s.feeAmount,
          slot.activeBin,
          s.activeBin,
          slot.volatilityAccumulator,
          slot.volatilityReference,
          slot.referenceBin
      );
  
      // Reserves live in the PoolManager as ERC-6909 claims: take claims for the input, give up claims for
      // the output. Both calls only move the hook's deltas, which the returned delta below brings to zero.
      // …

• Liquidity can’t be added directly

  Nobody can add liquidity to its pools through Uniswap directly. Liquidity only comes in through the hook’s own code.

• Only the hook creates its pools

  Nobody can create a pool with this hook directly. Pools are only created through the hook’s own code.

Who controls it: Nobody. The hook has no admin functions, and the code cannot be changed.

What do these labels mean? Based on the hook’s published code.