LibCommon.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

library LibCommon {
  /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
  /*                       CUSTOM ERRORS                        */
  /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

  /// @dev The ETH transfer has failed.
  error ETHTransferFailed();

  /// @dev The address is the zero address.
  error ZeroAddress();

  /// @notice raised when an ERC20 transfer fails
  error TransferFailed();

  /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
  /*                       ETH OPERATIONS                       */
  /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

  /// @notice Taken from Solady (https://github.com/vectorized/solady/blob/main/src/utils/SafeTransferLib.sol)
  /// @dev Sends `amount` (in wei) ETH to `to`.
  /// Reverts upon failure.
  function safeTransferETH(address to, uint256 amount) internal {
    // solhint-disable-next-line no-inline-assembly
    assembly {
      // Transfer the ETH and check if it succeeded or not.
      if iszero(call(gas(), to, amount, 0, 0, 0, 0)) {
        // Store the function selector of `ETHTransferFailed()`.
        // bytes4(keccak256(bytes("ETHTransferFailed()"))) = 0xb12d13eb
        mstore(0x00, 0xb12d13eb)
        // Revert with (offset, size).
        revert(0x1c, 0x04)
      }
    }
  }

  /// @notice Validates that the address is not the zero address using assembly.
  /// @dev Reverts if the address is the zero address.
  function validateAddress(address addr) internal pure {
    // solhint-disable-next-line no-inline-assembly
    assembly {
      if iszero(shl(96, addr)) {
        // Store the function selector of `ZeroAddress()`.
        // bytes4(keccak256(bytes("ZeroAddress()"))) = 0xd92e233d
        mstore(0x00, 0xd92e233d)
        // Revert with (offset, size).
        revert(0x1c, 0x04)
      }
    }
  }

  /// @notice Helper function to transfer ERC20 tokens without the need for SafeERC20.
  /// @dev Reverts if the ERC20 transfer fails.
  /// @param tokenAddress The address of the ERC20 token.
  /// @param from The address to transfer the tokens from.
  /// @param to The address to transfer the tokens to.
  /// @param amount The amount of tokens to transfer.
  function safeTransferFrom(
    address tokenAddress,
    address from,
    address to,
    uint256 amount
  ) internal returns (bool) {
    // solhint-disable-next-line avoid-low-level-calls
    (bool success, bytes memory data) = tokenAddress.call(
      abi.encodeWithSignature(
        "transferFrom(address,address,uint256)",
        from,
        to,
        amount
      )
    );
    if (!success) {
      if (data.length != 0) {
        // bubble up error
        // solhint-disable-next-line no-inline-assembly
        assembly {
          let returndata_size := mload(data)
          revert(add(32, data), returndata_size)
        }
      } else {
        revert TransferFailed();
      }
    }
    return true;
  }

  /// @notice Helper function to transfer ERC20 tokens without the need for SafeERC20.
  /// @dev Reverts if the ERC20 transfer fails.
  /// @param tokenAddress The address of the ERC20 token.
  /// @param to The address to transfer the tokens to.
  /// @param amount The amount of tokens to transfer.
  function safeTransfer(
    address tokenAddress,
    address to,
    uint256 amount
  ) internal returns (bool) {
    // solhint-disable-next-line avoid-low-level-calls
    (bool success, bytes memory data) = tokenAddress.call(
      abi.encodeWithSignature("transfer(address,uint256)", to, amount)
    );
    if (!success) {
      if (data.length != 0) {
        // bubble up error
        // solhint-disable-next-line no-inline-assembly
        assembly {
          let returndata_size := mload(data)
          revert(add(32, data), returndata_size)
        }
      } else {
        revert TransferFailed();
      }
    }
    return true;
  }
}