## Overview
The Greeter contract is a simple smart contract that allows setting and retrieving a greeting message. It provides functionality to greet, change the greeting, and track greeting-related metrics.

## Interface

| Function | Parameters | Returns | Description |
|----------|------------|---------|-------------|
| `greet()` | None | `string` | Increments greeting count and returns current greeting |
| `setGreeting(string)` | `newGreeting` | None | Updates greeting (owner-only) |
| `getGreeting()` | None | `string` | Retrieves current greeting |
| `getGreetingCount()` | None | `uint256` | Returns total number of greetings |
| `getOwner()` | None | `address` | Returns contract owner address |

## Events

| Event | Parameters | Description |
|-------|------------|-------------|
| `GreetingChanged` | `address indexed changer`, `string newGreeting` | Emitted when greeting is updated |
| `Greeted` | `address indexed greeter`, `string greeting` | Emitted on each greeting |

## Storage Layout

| Variable | Type | Visibility | Description |
|----------|------|------------|-------------|
| `_greeting` | `string` | Private | Current greeting message |
| `_owner` | `address` | Private | Contract owner address |
| `_greetingCount` | `uint256` | Private | Total number of greetings |

## Access Control
- Only contract owner can change the greeting
- Uses `msg.sender` comparison for authorization
- Throws `Unauthorized` error if non-owner attempts to modify greeting

## Security Considerations
- Input validation prevents empty greeting strings
- Prevents setting identical greeting
- Uses custom error handling
- Owner is set during contract deployment

## Deployment

### ChunkNet Devnet Configuration
- **RPC URL**: https://rpc.chunknet.org
- **Chain ID**: 214562
- **Deployment Environment**: ChunkNet Devnet

### Deployment Steps
1. Prepare initial greeting message
2. Deploy contract with `constructor(initialGreeting)`
3. Verify contract on block explorer at https://explorer.chunknet.org

### Recommended Deployment Script
bash
forge create Greeter --rpc-url https://rpc.chunknet.org \
  --constructor-args "Hello, ChunkNet!" \
  --private-key $PRIVATE_KEY


## Testing
- Test greeting retrieval
- Verify owner-only greeting modification
- Check greeting count incrementation
- Validate input validation mechanisms
- Test event emissions
- Verify access control restrictions