contract SplitWallet {
  using SafeTransferLib for address;
  using SafeTransferLib for ERC20;

  /**
   * EVENTS
   */

  /** @notice emitted after each successful ETH transfer to proxy
   *  @param split Address of the split that received ETH
   *  @param amount Amount of ETH received
   */
  event ReceiveETH(address indexed split, uint256 amount);

  /**
   * STORAGE
   */

  /**
   * STORAGE - CONSTANTS & IMMUTABLES
   */

  /// @notice address of SplitMain for split distributions & EOA/SC withdrawals
  ISplitMain public immutable splitMain;

  /**
   * MODIFIERS
   */

  /// @notice Reverts if the sender isn't SplitMain
  modifier onlySplitMain() {
    if (msg.sender != address(splitMain)) revert Unauthorized();
    _;
  }

  /**
   * CONSTRUCTOR
   */

  constructor() {
    splitMain = ISplitMain(msg.sender);
  }

  /**
   * FUNCTIONS - PUBLIC & EXTERNAL
   */

  /** @notice Sends amount `amount` of ETH in proxy to SplitMain
   *  @dev payable reduces gas cost; no vulnerability to accidentally lock
   *  ETH introduced since fn call is restricted to SplitMain
   *  @param amount Amount to send
   */
  function sendETHToMain(uint256 amount) external payable onlySplitMain() {
    address(splitMain).safeTransferETH(amount);
  }

  /** @notice Sends amount `amount` of ERC20 `token` in proxy to SplitMain
   *  @dev payable reduces gas cost; no vulnerability to accidentally lock
   *  ETH introduced since fn call is restricted to SplitMain
   *  @param token Token to send
   *  @param amount Amount to send
   */
  function sendERC20ToMain(ERC20 token, uint256 amount)
    external
    payable
    onlySplitMain()
  {
    token.safeTransfer(address(splitMain), amount);
  }
}
/**
 * @title SplitWallet
 * @author 0xSplits <will@0xSplits.xyz>
 * @notice The implementation logic for `SplitProxy`.
 * @dev `SplitProxy` handles `receive()` itself to avoid the gas cost with `DELEGATECALL`.
 */
function sendERC20ToMain(ERC20 token, uint256 amount)
  external
  payable
  onlySplitMain()
{
  token.safeTransfer(address(splitMain), amount);
}

/** @notice Sends amount `amount` of ERC20 `token` in proxy to SplitMain
 *  @dev payable reduces gas cost; no vulnerability to accidentally lock
 *  ETH introduced since fn call is restricted to SplitMain
 *  @param token Token to send
 *  @param amount Amount to send
 */