HookToken

A trading tax hook. It takes a tax on trades, charges more right after launch and only lets approved callers create pools.

• Takes a tax on trades

  On top of the normal pool fee, it keeps part of each trade as a tax. The tax is paid out in the same trade.

  The code that does this (beforeSwap):

  function beforeSwap(address, PoolKey calldata key, SwapParams calldata params, bytes calldata)
      external
      onlyPM
      returns (bytes4, BeforeSwapDelta, uint24)
  {
      if (!_isHomePool(key)) revert WrongPool();
      // ETH sisi yang ditentukan: beli exact-in (zeroForOne, amount<0) atau jual exact-out (!zeroForOne, amount>0)
      bool ethSpecified = (params.zeroForOne == (params.amountSpecified < 0));
      if (!ethSpecified) return (IHooks.beforeSwap.selector, BeforeSwapDeltaLibrary.ZERO_DELTA, 0);
      uint256 amt = params.amountSpecified < 0 ? uint256(-params.amountSpecified) : uint256(params.amountSpecified);
      uint256 tax = _takeTithe(amt);
      return (IHooks.beforeSwap.selector, toBeforeSwapDelta(int128(int256(tax)), 0), 0);
  }

• Higher at launch

  The tax starts higher right after launch and comes down over time, which makes it costly for bots to buy first.

  The code that does this (currentTitheBps):

  function currentTitheBps() public view returns (uint256) {
      if (launchedAt == 0) return TITHE_MAX_BPS;
      uint256 dt = block.timestamp - launchedAt;
      if (dt >= TITHE_DECAY) return TITHE_MIN_BPS;
      return TITHE_MAX_BPS - ((TITHE_MAX_BPS - TITHE_MIN_BPS) * dt) / TITHE_DECAY;
  }

• Only approved callers create pools

  New pools with this hook can only be created by approved callers, for example its own factory or launcher.

  The code that does this (beforeInitialize):

  function beforeInitialize(address, PoolKey calldata key, uint160) external onlyPM returns (bytes4) {
      if (strung || !_isHomePool(key)) revert WrongPool(); // hanya satu pool resmi
      strung = true;
      launchedAt = block.timestamp;
      return IHooks.beforeInitialize.selector;
  }

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.