MessageStore.sol

MessageStore.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.9.0;  // Specify a range for better compatibility

contract MessageStore {
    address public owner;
    string private storedMessage;
    
    event MessageStored(address indexed sender, string message);
    
    constructor() {
        owner = msg.sender;
    }
    
    modifier onlyOwner() {
        require(msg.sender == owner, "Only owner can perform this action");
        _;
    }
    
    function storeMessage(string memory _message) public onlyOwner {
        require(bytes(_message).length > 0, "Message cannot be empty");
        storedMessage = _message;
        emit MessageStored(msg.sender, _message);
    }
    
    function retrieveMessage() public view returns (string memory) {
        return storedMessage;
    }
}