Add: script to run localnet nodes

.gitignore

@@ -267,3 +267,4 @@ launchSettings.json
 # Benchmarks
 **/BenchmarkDotNet.Artifacts/
 /src/Neo.CLI/neo-cli/
+**/localnet_nodes/

scripts/run-localnet-nodes.md

@@ -0,0 +1,120 @@
+# Localnet Node Management Script
+
+This script helps you create and manage multiple Neo localnet nodes for development and testing purposes.
+
+## Features
+
+- **Automatic Configuration Generation**: Creates individual configuration files for each node
+- **Port Management**: Automatically assigns unique ports for P2P and RPC communication
+- **Node Management**: Start, stop, restart, and monitor multiple nodes
+- **Data Isolation**: Each node has its own data directory and storage
+- **Process Management**: Tracks running processes with PID files
+
+## Usage
+
+### Basic Commands
+
+```bash
+# Start 7 nodes (default)
+./run-localnet-nodes.sh start
+
+# Check status of all nodes
+./run-localnet-nodes.sh status
+
+# Stop all nodes
+./run-localnet-nodes.sh stop
+
+# Restart all nodes
+./run-localnet-nodes.sh restart
+
+# Clean up all data
+./run-localnet-nodes.sh clean
+```
+
+### Node Configuration
+
+Each node gets:
+- **Unique P2P Port**: Starting from 20333 (Node0: 20333, Node1: 20334, etc.)
+- **Unique RPC Port**: Starting from 10330 (Node0: 10330, Node1: 10331, etc.)
+- **Isolated Data Directory**: `localnet_nodes/node_X/`
+- **Individual Configuration**: `localnet_nodes/node_X/config.json`
+- **Process Logs**: `localnet_nodes/node_X/neo.log`
+
+### Network Configuration
+
+- **Network ID**: 1234567890 (localnet)
+- **Block Time**: 15 seconds
+- **Validators**: 7 validators configured
+- **Seed List**: All nodes are configured to connect to each other
+
+## Directory Structure
+
+```
+localnet_nodes/
+├── node_0/
+│   ├── config.json
+│   ├── neo.log
+│   ├── neo.pid
+│   └── Data_LevelDB_Node0/
+├── node_1/
+│   ├── config.json
+│   ├── neo.log
+│   ├── neo.pid
+│   └── Data_LevelDB_Node1/
+└── ...
+```
+
+## Prerequisites
+
+1. **Build Neo Project**: Make sure the project is built
+   ```bash
+   dotnet build
+   ```
+
+2. **Neo-CLI Available**: The script looks for `neo-cli` or `neo-cli.dll` in the `bin/` directory
+
+## Troubleshooting
+
+### Node Won't Start
+- Check if neo-cli is built: `ls bin/neo-cli*`
+- Check logs: `cat localnet_nodes/node_X/neo.log`
+- Verify ports are not in use: `netstat -an | grep 20333`
+
+### Port Conflicts
+- The script uses ports 20333+ for P2P and 10330+ for RPC
+- Make sure these ports are available
+- You can modify `BASE_PORT` and `BASE_RPC_PORT` in the script
+
+### Process Management
+- Each node runs as a background process
+- PID files are stored in each node's directory
+- Use `./run-localnet-nodes.sh status` to check running nodes
+
+## Development Tips
+
+1. **Start with Fewer Nodes**: For development, 3-5 nodes are usually sufficient
+2. **Monitor Logs**: Check individual node logs for debugging
+3. **Clean Restart**: Use `clean` command to start fresh
+4. **Network Connectivity**: Nodes automatically discover each other via seed list
+
+## Example Workflow
+
+```bash
+# 1. Build the project
+dotnet build
+
+# 2. Start 3 localnet nodes
+./run-localnet-nodes.sh start 3
+
+# 3. Check status
+./run-localnet-nodes.sh status
+
+# 4. Monitor a specific node
+tail -f localnet_nodes/node_0/neo.log
+
+# 5. Stop all nodes
+./run-localnet-nodes.sh stop
+
+# 6. Clean up when done
+./run-localnet-nodes.sh clean
+```