contract AlphaWhitelist is IAlphaWhiteList, Ownable {
  using SafeMath for uint256;

  uint256 public ethCapValue;
  uint256 public limitUsers;
  uint256 public counter;

  // Log Limit Users Changed
  event UserLimitUpdated(uint256 _newUserLimit);

  // Log Cap Value Changed
  event CapValueUpdated(uint256 _newCapValue);

  constructor(uint256 _limitUsers, uint256 _capValue) public {
    limitUsers = _limitUsers;
    ethCapValue = _capValue;
  }

  /**
   * @dev Does Whitelist Routine to check if:
   * - limit of users got reached
   * - first deposit is less than ethCapValue
   * - subsequent total deposits are less than 2*ethCapValue
   * @param _usrAddr: Address of the User to check
   * @return letgo a boolean that allows a function to continue in "require" context
   */
  function whiteListRoutine(
    address _usrAddr,
    uint64 _assetID,
    uint256 _amount,
    address _erc1155
  ) external override returns (bool letgo) {
    uint256 currentBalance = IFujiERC1155(_erc1155).balanceOf(_usrAddr, _assetID);
    if (currentBalance == 0) {
      counter = counter.add(1);
      letgo = _amount <= ethCapValue && counter <= limitUsers;
    } else {
      letgo = currentBalance.add(_amount) <= ethCapValue.mul(2);
    }
  }

  // Administrative Functions

  /**
   * @dev Modifies the limitUsers
   * @param _newUserLimit: New User Limit number
   */
  function updateLimitUser(uint256 _newUserLimit) public onlyOwner {
    limitUsers = _newUserLimit;
    emit UserLimitUpdated(_newUserLimit);
  }

  /**
   * @dev Modifies the ethCapValue
   * @param _newEthCapValue: New ethCapValue
   */
  function updateCap(uint256 _newEthCapValue) public onlyOwner {
    ethCapValue = _newEthCapValue;
    emit CapValueUpdated(_newEthCapValue);
  }
}
function whiteListRoutine(
    address _usrAddr,
    uint64 _assetID,
    uint256 _amount,
    address _erc1155
  ) external override returns (bool letgo) {
    uint256 currentBalance = IFujiERC1155(_erc1155).balanceOf(_usrAddr, _assetID);
    if (currentBalance == 0) {
      counter = counter.add(1);
      letgo = _amount <= ethCapValue && counter <= limitUsers;
    } else {
      letgo = currentBalance.add(_amount) <= ethCapValue.mul(2);
    }
  }
/**
 * @dev Does Whitelist Routine to check if:
 * - limit of users got reached
 * - first deposit is less than ethCapValue
 * - subsequent total deposits are less than 2*ethCapValue
 * @param _usrAddr: Address of the User to check
 * @return letgo a boolean that allows a function to continue in "require" context
 */