ERC1967Proxy

Grip lets anyone launch a coin paired with ETH, a dollar coin or a tokenized stock on Robinhood Chain. This hook runs every Grip pool: it locks the whole supply in the pool for good and takes a fee on every trade that goes to the coin's holders.

• Liquidity is locked for good

  Only the Grip launcher can add liquidity, and it puts the whole supply in at launch. Nobody can remove it, so the pool can't be drained (a rug pull).

  The code that does this (beforeAddLiquidity):

  function beforeAddLiquidity(address sender, PoolKey calldata, IPoolManager.ModifyLiquidityParams calldata, bytes calldata)
      external
      view
      onlyPoolManager
      returns (bytes4)
  {
      if (sender != launcher) revert NotLauncher();
      return IHooks.beforeAddLiquidity.selector;
  }

• A fee that pays holders

  Every buy and sell pays a fee chosen at launch, from 1% to 10%, taken in the coin it is paired with, never in the coin itself. Anyone can send the collected fees to the coin's vault, which pays the holders and a daily prize draw.

  The code that does this (_take):

  function _take(PoolId id, Pool storage pool, uint256 fee) private {
      poolManager.mint(address(this), uint256(uint160(pool.quote)), fee); // the hook's credit, held as PoolManager claims
      pending[id] += fee;
      emit Fee(id, pool.token, fee);
  }

• Copycat pools can't trade the coin

  The hook records exactly how many coins each trade in the official pool pays out, and the coin refuses to move any other amount out of Uniswap. So copycat pools for the same coin don't work.

  The code that does this (_release):

  function _release(address token, uint256 amount) private {
      bytes32 slot = _slot(token);
      assembly ("memory-safe") {
          tstore(slot, add(tload(slot), amount))
      }
  }

• Only official pools can open

  A pool using this hook can only be set up by the Grip launcher for a coin it registered.

  The code that does this (beforeInitialize):

  function beforeInitialize(address sender, PoolKey calldata key, uint160) external view onlyPoolManager returns (bytes4) {
      if (sender != launcher || pools[key.toId()].token == address(0)) revert NotGripPool();
      return IHooks.beforeInitialize.selector;
  }

Who controls it: The owner of the Grip launcher (the hook developer) can replace the hook's code until upgrades are frozen on the launcher, and then never again. A new version must keep the same launcher and hook settings. The fee for each coin is set at launch.

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