rs/ethereum/cketh/minter/EthDepositHelper.sol

// SPDX-License-Identifier: Apache-2.0

pragma solidity 0.8.18;

/**
 * @title A helper smart contract for ETH <-> ckETH conversion.
 * @notice This smart contract deposits incoming ETH to the ckETH minter account and emits deposit events.
 */
contract CkEthDeposit {
    address payable private immutable cketh_minter_main_address;

    event ReceivedEth(address indexed from, uint256 value, bytes32 indexed principal);

    /**
     * @dev Set cketh_minter_main_address.
     */
    constructor(address _cketh_minter_main_address) {
        cketh_minter_main_address = payable(_cketh_minter_main_address);
    }

    /**
     * @dev Return ckETH minter main address.
     * @return address of ckETH minter main address.
     */
    function getMinterAddress() public view returns (address) {
        return cketh_minter_main_address;
    }

    /**
     * @dev Emits the `ReceivedEth` event if the transfer succeeds.
     */
    function deposit(bytes32 _principal) public payable {
        emit ReceivedEth(msg.sender, msg.value, _principal);
        cketh_minter_main_address.transfer(msg.value);
    }
}