# BukkitstrPlugin

BukkitstrPlugin is a Minecraft plugin that integrates with the Nostr relay to authenticate players. Players must authenticate by signing a valid Nostr event before they can move in the game.

## Demo
<video height="480" width="270" controls src="https://v.nostr.build/5XxsgV03wlo1iCPW.mp4"></video>

## Features

- **WebSocket Integration**: Connects to a Nostr relay using WebSockets.
- **Player Authentication**: Players must authenticate with their Minecraft username via a Nostr event.
- **Movement Lock**: Prevents players from moving until they are authenticated.
- **Real-time Messaging**: Sends and receives messages from the Nostr relay in real-time.

## Prerequisites

- **Java 8 or higher**
- **Maven** (for building the plugin)
- **Spigot/Paper** server (Minecraft 1.20 or higher)

- You must sign a kind 30078 to store your username/pubkey
  - "d" "bukkitstr"
  - "minecraft" "Your Minecraft User Name"
  - "nostr" "Your PUBkey hex"


## Installation

1. **Clone the repository**:
   ```sh
   git clone https://git.vanderwarker.family/nostr/bukkitstr.git
   cd bukkitstr
   ```

2. **Configure the plugin**:
   Make sure to replace `wss://your-nostr-relay-url` in the `BukkitstrPlugin.java` file with your actual Nostr relay WebSocket URL.

3. **Build the plugin**:
   ```sh
   mvn clean package
   ```

4. **Copy the plugin JAR**:
   Copy the generated `bukkitstr-plugin-1.0-SNAPSHOT.jar` file from the `target` directory to your Minecraft server's `plugins` directory.

5. **Start your server**:
   Start your Minecraft server and check the console for any errors. The plugin should initialize and connect to the Nostr relay.

## Usage

### Authentication Command

Players need to use the `/auth` command to start the authentication process. The plugin will wait for a Nostr event containing the player's Minecraft username in the `d` tag content.

```sh
/auth
```

### Sign Event

Next, you need to sign a event kind "13378008" and the "d" tag to be your Minecraft username.

Using [nostril](https://github.com/jb55/nostril) is quite easy.
```sh
nostril --kind 13378008 --tag "d" "MinecraftUsername"
```

Then send to the relay you've specified in src/../BukkitstrPlugin.java


### Player Authentication Process

1. **Connect to the Nostr relay**: The plugin connects to the specified Nostr relay when the server starts.
2. **Send Authentication Request**: The plugin sends an initial request to the Nostr relay to listen for authentication events.
3. **Wait for Nostr Event**: When a player uses the `/auth` command, the plugin waits for a Nostr event containing the player's username in the `d` tag.
4. **Authenticate Player**: If the received Nostr event's `d` tag content matches the player's username, the player is authenticated and can move freely. Otherwise, they will receive an authentication failure message.

## Developer Information

### Source Code

The main source code is located in the `src/main/java/family/vanderwarker/bukkitstr/BukkitstrPlugin.java` file.

### Dependencies

Ensure the following dependencies are added to your `pom.xml`:

```xml
<dependencies>
    <dependency>
        <groupId>org.java-websocket</groupId>
        <artifactId>Java-WebSocket</artifactId>
        <version>1.5.2</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.13.3</version>
    </dependency>
</dependencies>
```

## Acknowledgments

- Thanks to the SpigotMC community for their documentation and support.
- Thanks to the Nostr community for their innovative protocol.
- Thanks to [npub1826v365he5ty69lk3xgvzqrwy8587vdfrxnsz0k09khzustf8r7s6j7t95](nostr:npub1826v365he5ty69lk3xgvzqrwy8587vdfrxnsz0k09khzustf8r7s6j7t95)
- Thanks to ChatGPT 4.o