[Server]

The [Server] attribute designates that the method can only be executed on the server.

Key Features

• Executes only on the server.
• A warning is triggered if called from the client.
• Can be used in both Unity's game loop methods (like Start, Update, etc.) and regular methods.
• If used in overridden methods, the attribute must also be specified in the overridden method.

Use Examples

Basic Use

public class GameManager : NetworkBehaviour
{
    [Server]
    void Update()
    {
        // Logic that runs only on the server
        // Example: Game state updates
        UpdateGameState();
    }

    [Server]
    private void UpdateGameState()
    {
        // Game state update logic
        // Notify clients via ClientRpc if necessary
    }
}

Using in Inherited Methods

public abstract class BaseEnemy : NetworkBehaviour
{
    [Server]
    protected virtual void HandleAI() 
    {
        // Basic AI logic
    }
}

public class SpecificEnemy : BaseEnemy
{
    [Server]
    protected override void HandleAI()
    {
        base.HandleAI();
        // Additional AI logic
    }
}

Using with State Checks

public class SpawnManager : NetworkBehaviour
{
    [Server]
    private void SpawnEnemy()
    {
        // Server check
        if (!isServer) 
        {
            Debug.LogWarning("Enemy spawning is only allowed on the server");
            return;
        }

        // Enemy spawning logic
        GameObject enemy = Instantiate(enemyPrefab);
        NetworkServer.Spawn(enemy);
    }
}

note

1. Methods with the [Server] attribute should include logic that must be executed only on the server.
2. To pass information to the client, you should use [ClientRpc].
3. Typical use cases include AI handling, game logic processing, and object spawning. :::