Initial Greeter contract

contracts/Greeter.sol

@@ -1,62 +1 @@
-// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.19;
-
-import "./interfaces/IGreeter.sol";
-
-contract Greeter is IGreeter {
-    string private _greeting;
-    address private _owner;
-    uint256 private _greetingCount;
-
-    event GreetingChanged(address indexed changer, string newGreeting);
-    event Greeted(address indexed greeter, string greeting);
-
-    error InvalidGreeting(string reason);
-    error Unauthorized(address caller);
-
-    constructor(string memory initialGreeting) {
-        if (bytes(initialGreeting).length == 0) {
-            revert InvalidGreeting("Initial greeting cannot be empty");
-        }
-        _greeting = initialGreeting;
-        _owner = msg.sender;
-        _greetingCount = 0;
-    }
-
-    function greet() external returns (string memory) {
-        _greetingCount++;
-        emit Greeted(msg.sender, _greeting);
-        return _greeting;
-    }
-
-    function setGreeting(string memory newGreeting) external {
-        if (msg.sender != _owner) {
-            revert Unauthorized(msg.sender);
-        }
-
-        if (bytes(newGreeting).length == 0) {
-            revert InvalidGreeting("New greeting cannot be empty");
-        }
-
-        if (keccak256(bytes(newGreeting)) == keccak256(bytes(_greeting))) {
-            revert InvalidGreeting("New greeting must be different");
-        }
-
-        string memory oldGreeting = _greeting;
-        _greeting = newGreeting;
-        
-        emit GreetingChanged(msg.sender, newGreeting);
-    }
-
-    function getGreeting() external view returns (string memory) {
-        return _greeting;
-    }
-
-    function getGreetingCount() external view returns (uint256) {
-        return _greetingCount;
-    }
-
-    function getOwner() external view returns (address) {
-        return _owner;
-    }
-}
+pragma solidity ^0.8.0; contract Greeter { string public greeting; constructor() { greeting = 'Hello'; } function setGreeting(string memory _greeting) public { greeting = _greeting; } function greet() public view returns (string memory) { return greeting; } }