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HelloWorld.sol

// SPDX-License-Identifier: MIT

pragma solidity 0.8.7;

/**
 * THIS IS AN EXAMPLE CONTRACT THAT USES UN-AUDITED CODE.
 * DO NOT USE THIS CODE IN PRODUCTION.
 */

contract HelloWorld {
  string private message;

  constructor(string memory initialMessage) {
    message = initialMessage;
  }

  function updateMessage(string memory newMessage) public {
    message = newMessage;
  }

  function getMessage() public view returns(string memory) {
      return message;
  }
}