Automatically generate Agent names if not configured

.dockerignore

@@ -1,9 +0,0 @@
-# Ignore hidden files
-.*
-
-# Include .git for build version information
-!.git
-
-# Not needed for building
-AddMigration.*
-*.DotSettings.user

.run/Agent 1.run.xml

@@ -5,13 +5,13 @@
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/.workdir/Agent1" />
     <option name="PASS_PARENT_ENVS" value="1" />
     <envs>
-      <env name="AGENT_KEY" value="JXBQQYG5T267RQS75MXWBTCJZY5CKTCCGQY22MCZPHSQQSJYCHH2NG2TCNXQY6TBSXM9NQDRS2CMX" />
       <env name="AGENT_NAME" value="Agent 1" />
       <env name="ALLOWED_RCON_PORTS" value="25575,27000,27001" />
       <env name="ALLOWED_SERVER_PORTS" value="25565,26000,26001" />
       <env name="JAVA_SEARCH_PATH" value="~/.jdks" />
       <env name="MAX_INSTANCES" value="3" />
       <env name="MAX_MEMORY" value="12G" />
+      <env name="SERVER_AUTH_TOKEN_FILE" value="./secrets/agent.token" />
       <env name="SERVER_HOST" value="localhost" />
     </envs>
     <option name="USE_EXTERNAL_CONSOLE" value="0" />

.run/Agent 2.run.xml

@@ -5,13 +5,13 @@
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/.workdir/Agent2" />
     <option name="PASS_PARENT_ENVS" value="1" />
     <envs>
-      <env name="AGENT_KEY" value="JXBQQYG5T267RQS75MXWBTCJZY5CKTCCGQY22MCZPHSQQSJYCHH2NG2TCNXQY6TBSXM9NQDRS2CMX" />
       <env name="AGENT_NAME" value="Agent 2" />
       <env name="ALLOWED_RCON_PORTS" value="27002-27006" />
       <env name="ALLOWED_SERVER_PORTS" value="26002-26006" />
       <env name="JAVA_SEARCH_PATH" value="~/.jdks" />
       <env name="MAX_INSTANCES" value="5" />
       <env name="MAX_MEMORY" value="10G" />
+      <env name="SERVER_AUTH_TOKEN_FILE" value="./secrets/agent.token" />
       <env name="SERVER_HOST" value="localhost" />
     </envs>
     <option name="USE_EXTERNAL_CONSOLE" value="0" />

.run/Agent 3.run.xml

@@ -5,13 +5,13 @@
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/.workdir/Agent3" />
     <option name="PASS_PARENT_ENVS" value="1" />
     <envs>
-      <env name="AGENT_KEY" value="JXBQQYG5T267RQS75MXWBTCJZY5CKTCCGQY22MCZPHSQQSJYCHH2NG2TCNXQY6TBSXM9NQDRS2CMX" />
       <env name="AGENT_NAME" value="Agent 3" />
       <env name="ALLOWED_RCON_PORTS" value="27007" />
       <env name="ALLOWED_SERVER_PORTS" value="26007" />
       <env name="JAVA_SEARCH_PATH" value="~/.jdks" />
       <env name="MAX_INSTANCES" value="1" />
       <env name="MAX_MEMORY" value="2560M" />
+      <env name="SERVER_AUTH_TOKEN_FILE" value="./secrets/agent.token" />
       <env name="SERVER_HOST" value="localhost" />
     </envs>
     <option name="USE_EXTERNAL_CONSOLE" value="0" />

.workdir/.gitignore

@@ -0,0 +1,2 @@
+/Agent*/data
+/Agent*/temp

.workdir/Agent1/.gitignore

@@ -1,2 +0,0 @@
-*
-!.gitignore

.workdir/Agent1/secrets/agent.key

@@ -0,0 +1 @@
+tLkn<EFBFBD>Z<EFBFBD><EFBFBD>}ы<><D18B>|~2<><32>><3E><>р<EFBFBD><D180>O*<2A>	p

.workdir/Agent1/secrets/agent.token

@@ -0,0 +1 @@
+TH7Z2MJKMR975N6HFBKQP9WQFMWWN5

.workdir/Agent2/.gitignore

@@ -1,2 +0,0 @@
-*
-!.gitignore

.workdir/Agent2/secrets/agent.key

@@ -0,0 +1 @@
+tLkn<EFBFBD>Z<EFBFBD><EFBFBD>}ы<><D18B>|~2<><32>><3E><>р<EFBFBD><D180>O*<2A>	p

.workdir/Agent2/secrets/agent.token

@@ -0,0 +1 @@
+TH7Z2MJKMR975N6HFBKQP9WQFMWWN5

.workdir/Agent3/.gitignore

@@ -1,2 +0,0 @@
-*
-!.gitignore

.workdir/Agent3/secrets/agent.key

@@ -0,0 +1 @@
+tLkn<EFBFBD>Z<EFBFBD><EFBFBD>}ы<><D18B>|~2<><32>><3E><>р<EFBFBD><D180>O*<2A>	p

.workdir/Agent3/secrets/agent.token

@@ -0,0 +1 @@
+TH7Z2MJKMR975N6HFBKQP9WQFMWWN5

.workdir/Server/.gitignore

@@ -1 +0,0 @@
-/keys

.workdir/Server/secrets/agent.token

@@ -0,0 +1 @@
+TH7Z2MJKMR975N6HFBKQP9WQFMWWN5

.workdir/Server/secrets/secret.key

@@ -1 +1 @@
-<EFBFBD>Z<EFBFBD>t<>MPI<49>GMZ<4D><5A><EFBFBD><EFBFBD>kN<6B>VF1X<><58>p
++<2B><><EFBFBD><EFBFBD><<3C>f:<3A>bJ"e<18>׸ބ<D7B8><1F><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>

Agent/Phantom.Agent.Minecraft/Command/MinecraftCommand.cs

@@ -1,9 +0,0 @@
-namespace Phantom.Agent.Minecraft.Command; 
-
-public static class MinecraftCommand {
-	public const string Stop = "stop";
-
-	public static string Say(string message) {
-		return "say " + message;
-	}
-}

Agent/Phantom.Agent.Minecraft/Instance/InstanceProperties.cs

@@ -1,5 +1,4 @@
-using System.Collections.Immutable;
-using Phantom.Agent.Minecraft.Java;
+using Phantom.Agent.Minecraft.Java;
 using Phantom.Agent.Minecraft.Properties;
 
 namespace Phantom.Agent.Minecraft.Instance;
@@ -7,7 +6,6 @@ namespace Phantom.Agent.Minecraft.Instance;
 public sealed record InstanceProperties(
 	Guid JavaRuntimeGuid,
 	JvmProperties JvmProperties,
-	ImmutableArray<string> JvmArguments,
 	string InstanceFolder,
 	string ServerVersion,
 	ServerProperties ServerProperties

Agent/Phantom.Agent.Minecraft/Java/JavaRuntimeDiscovery.cs

@@ -7,7 +7,7 @@ using Serilog;
 namespace Phantom.Agent.Minecraft.Java;
 
 public sealed class JavaRuntimeDiscovery {
-	private static readonly ILogger Logger = PhantomLogger.Create(nameof(JavaRuntimeDiscovery));
+	private static readonly ILogger Logger = PhantomLogger.Create(typeof(JavaRuntimeDiscovery));
 
 	public static string? GetSystemSearchPath() {
 		const string LinuxJavaPath = "/usr/lib/jvm";
@@ -38,38 +38,28 @@ public sealed class JavaRuntimeDiscovery {
 			AttributesToSkip = FileAttributes.Hidden | FileAttributes.ReparsePoint | FileAttributes.System
 		}).Order()) {
 			var javaExecutablePath = Paths.NormalizeSlashes(Path.Combine(binFolderPath, javaExecutableName));
-			
-			FileAttributes javaExecutableAttributes;
-			try {
-				javaExecutableAttributes = File.GetAttributes(javaExecutablePath);
-			} catch (Exception) {
-				continue;
+			if (File.Exists(javaExecutablePath)) {
+				Logger.Information("Found candidate Java executable: {JavaExecutablePath}", javaExecutablePath);
+
+				JavaRuntime? foundRuntime;
+				try {
+					foundRuntime = await TryReadJavaRuntimeInformationFromProcess(javaExecutablePath);
+				} catch (OperationCanceledException) {
+					Logger.Error("Java process did not exit in time.");
+					continue;
+				} catch (Exception e) {
+					Logger.Error(e, "Caught exception while reading Java version information.");
+					continue;
+				}
+
+				if (foundRuntime == null) {
+					Logger.Error("Java executable did not output version information.");
+					continue;
+				}
+
+				Logger.Information("Found Java {DisplayName} at: {Path}", foundRuntime.DisplayName, javaExecutablePath);
+				yield return new JavaRuntimeExecutable(javaExecutablePath, foundRuntime);
 			}
-
-			if (javaExecutableAttributes.HasFlag(FileAttributes.ReparsePoint)) {
-				continue;
-			}
-
-			Logger.Information("Found candidate Java executable: {JavaExecutablePath}", javaExecutablePath);
-
-			JavaRuntime? foundRuntime;
-			try {
-				foundRuntime = await TryReadJavaRuntimeInformationFromProcess(javaExecutablePath);
-			} catch (OperationCanceledException) {
-				Logger.Error("Java process did not exit in time.");
-				continue;
-			} catch (Exception e) {
-				Logger.Error(e, "Caught exception while reading Java version information.");
-				continue;
-			}
-
-			if (foundRuntime == null) {
-				Logger.Error("Java executable did not output version information.");
-				continue;
-			}
-
-			Logger.Information("Found Java {DisplayName} at: {Path}", foundRuntime.DisplayName, javaExecutablePath);
-			yield return new JavaRuntimeExecutable(javaExecutablePath, foundRuntime);
 		}
 	}
 

Agent/Phantom.Agent.Minecraft/Java/JvmArgumentBuilder.cs

@@ -1,31 +1,25 @@
-using System.Collections.Immutable;
-using System.Collections.ObjectModel;
+using System.Collections.ObjectModel;
 
 namespace Phantom.Agent.Minecraft.Java;
 
 sealed class JvmArgumentBuilder {
 	private readonly JvmProperties basicProperties;
-	private readonly List<string> customArguments = new ();
+	private readonly List<string> customProperties = new ();
 
-	public JvmArgumentBuilder(JvmProperties basicProperties, ImmutableArray<string> customArguments) {
+	public JvmArgumentBuilder(JvmProperties basicProperties) {
 		this.basicProperties = basicProperties;
-
-		foreach (var jvmArgument in customArguments) {
-			this.customArguments.Add(jvmArgument);
-		}
 	}
 
 	public void AddProperty(string key, string value) {
-		customArguments.Add("-D" + key + "=\"" + value + "\""); // TODO test quoting?
+		customProperties.Add("-D" + key + "=\"" + value + "\""); // TODO test quoting?
 	}
 
 	public void Build(Collection<string> target) {
-		foreach (var property in customArguments) {
-			target.Add(property);
-		}
-
 		target.Add("-Xms" + basicProperties.InitialHeapMegabytes + "M");
 		target.Add("-Xmx" + basicProperties.MaximumHeapMegabytes + "M");
-		target.Add("-Xrs");
+
+		foreach (var property in customProperties) {
+			target.Add(property);
+		}
 	}
 }

Agent/Phantom.Agent.Minecraft/Launcher/BaseLauncher.cs

@@ -4,8 +4,6 @@ using Kajabity.Tools.Java;
 using Phantom.Agent.Minecraft.Instance;
 using Phantom.Agent.Minecraft.Java;
 using Phantom.Agent.Minecraft.Server;
-using Phantom.Common.Minecraft;
-using Serilog;
 
 namespace Phantom.Agent.Minecraft.Launcher;
 
@@ -16,15 +14,11 @@ public abstract class BaseLauncher {
 		this.instanceProperties = instanceProperties;
 	}
 
-	public async Task<LaunchResult> Launch(ILogger logger, LaunchServices services, EventHandler<DownloadProgressEventArgs> downloadProgressEventHandler, CancellationToken cancellationToken) {
+	public async Task<LaunchResult> Launch(LaunchServices services, EventHandler<DownloadProgressEventArgs> downloadProgressEventHandler, CancellationToken cancellationToken) {
 		if (!services.JavaRuntimeRepository.TryGetByGuid(instanceProperties.JavaRuntimeGuid, out var javaRuntimeExecutable)) {
 			return new LaunchResult.InvalidJavaRuntime();
 		}
 
-		if (JvmArgumentsHelper.Validate(instanceProperties.JvmArguments) != null) {
-			return new LaunchResult.InvalidJvmArguments();
-		}
-
 		var vanillaServerJarPath = await services.ServerExecutables.DownloadAndGetPath(instanceProperties.ServerVersion, downloadProgressEventHandler, cancellationToken);
 		if (vanillaServerJarPath == null) {
 			return new LaunchResult.CouldNotDownloadMinecraftServer();
@@ -39,8 +33,8 @@ public abstract class BaseLauncher {
 			UseShellExecute = false,
 			CreateNoWindow = false
 		};
-		
-		var jvmArguments = new JvmArgumentBuilder(instanceProperties.JvmProperties, instanceProperties.JvmArguments);
+
+		var jvmArguments = new JvmArgumentBuilder(instanceProperties.JvmProperties);
 		CustomizeJvmArguments(jvmArguments);
 
 		var serverJarPath = await PrepareServerJar(vanillaServerJarPath, instanceProperties.InstanceFolder, cancellationToken);
@@ -53,29 +47,12 @@ public abstract class BaseLauncher {
 		var process = new Process { StartInfo = startInfo };
 		var session = new InstanceSession(process);
 
-		try {
-			await AcceptEula(instanceProperties);
-			await UpdateServerProperties(instanceProperties);
-		} catch (Exception e) {
-			logger.Error(e, "Caught exception while configuring the server.");
-			return new LaunchResult.CouldNotConfigureMinecraftServer();
-		}
+		await AcceptEula(instanceProperties);
+		await UpdateServerProperties(instanceProperties);
 
-		try {
-			process.Start();
-			process.BeginOutputReadLine();
-			process.BeginErrorReadLine();
-		} catch (Exception launchException) {
-			logger.Error(launchException, "Caught exception launching the server process.");
-			
-			try {
-				process.Kill();
-			} catch (Exception killException) {
-				logger.Error(killException, "Caught exception trying to kill the server process after a failed launch.");
-			}
-
-			return new LaunchResult.CouldNotStartMinecraftServer();
-		}
+		process.Start();
+		process.BeginOutputReadLine();
+		process.BeginErrorReadLine();
 
 		return new LaunchResult.Success(session);
 	}
@@ -95,18 +72,16 @@ public abstract class BaseLauncher {
 		var serverPropertiesFilePath = Path.Combine(instanceProperties.InstanceFolder, "server.properties");
 		var serverPropertiesData = new JavaProperties();
 
-		await using var fileStream = new FileStream(serverPropertiesFilePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None);
 		try {
-			serverPropertiesData.Load(fileStream);
-		} catch (ParseException e) {
-			throw new Exception("Could not parse server.properties file: " + serverPropertiesFilePath, e);
+			await using var readStream = new FileStream(serverPropertiesFilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
+			serverPropertiesData.Load(readStream);
+		} catch (FileNotFoundException) {
+			// ignore
 		}
 		
 		instanceProperties.ServerProperties.SetTo(serverPropertiesData);
 
-		fileStream.Seek(0L, SeekOrigin.Begin);
-		fileStream.SetLength(0L);
-		
-		serverPropertiesData.Store(fileStream, true);
+		await using var writeStream = new FileStream(serverPropertiesFilePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
+		serverPropertiesData.Store(writeStream, true);
 	}
 }

Agent/Phantom.Agent.Minecraft/Launcher/LaunchResult.cs

@@ -8,12 +8,6 @@ public abstract record LaunchResult {
 	public sealed record Success(InstanceSession Session) : LaunchResult;
 
 	public sealed record InvalidJavaRuntime : LaunchResult;
-	
-	public sealed record InvalidJvmArguments : LaunchResult;
 
 	public sealed record CouldNotDownloadMinecraftServer : LaunchResult;
-	
-	public sealed record CouldNotConfigureMinecraftServer : LaunchResult;
-	
-	public sealed record CouldNotStartMinecraftServer : LaunchResult;
 }

Agent/Phantom.Agent.Minecraft/Launcher/LaunchServices.cs

@@ -1,7 +1,6 @@
 using Phantom.Agent.Minecraft.Java;
 using Phantom.Agent.Minecraft.Server;
-using Phantom.Utils.Runtime;
 
 namespace Phantom.Agent.Minecraft.Launcher; 
 
-public sealed record LaunchServices(TaskManager TaskManager, MinecraftServerExecutables ServerExecutables, JavaRuntimeRepository JavaRuntimeRepository);
+public sealed record LaunchServices(MinecraftServerExecutables ServerExecutables, JavaRuntimeRepository JavaRuntimeRepository);

Agent/Phantom.Agent.Minecraft/Phantom.Agent.Minecraft.csproj

@@ -7,17 +7,15 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Kajabity.Tools.Java" />
+    <PackageReference Include="Kajabity.Tools.Java" Version="0.3.7879.40798" />
   </ItemGroup>
   
   <ItemGroup>
     <ProjectReference Include="..\..\Common\Phantom.Common.Data\Phantom.Common.Data.csproj" />
     <ProjectReference Include="..\..\Common\Phantom.Common.Logging\Phantom.Common.Logging.csproj" />
-    <ProjectReference Include="..\..\Common\Phantom.Common.Minecraft\Phantom.Common.Minecraft.csproj" />
     <ProjectReference Include="..\..\Utils\Phantom.Utils.Collections\Phantom.Utils.Collections.csproj" />
     <ProjectReference Include="..\..\Utils\Phantom.Utils.Cryptography\Phantom.Utils.Cryptography.csproj" />
     <ProjectReference Include="..\..\Utils\Phantom.Utils.IO\Phantom.Utils.IO.csproj" />
-    <ProjectReference Include="..\..\Utils\Phantom.Utils.Runtime\Phantom.Utils.Runtime.csproj" />
   </ItemGroup>
 
 </Project>

Agent/Phantom.Agent.Minecraft/Server/MinecraftServerExecutableDownloader.cs

@@ -1,9 +1,9 @@
-using System.Security.Cryptography;
+using System.Net.Http.Json;
+using System.Security.Cryptography;
+using System.Text.Json;
 using Phantom.Common.Logging;
-using Phantom.Common.Minecraft;
 using Phantom.Utils.Cryptography;
 using Phantom.Utils.IO;
-using Phantom.Utils.Runtime;
 using Serilog;
 
 namespace Phantom.Agent.Minecraft.Server;
@@ -11,8 +11,8 @@ namespace Phantom.Agent.Minecraft.Server;
 sealed class MinecraftServerExecutableDownloader {
 	private static readonly ILogger Logger = PhantomLogger.Create<MinecraftServerExecutableDownloader>();
 
-	private readonly MinecraftVersions minecraftVersions;
-	
+	private const string VersionManifestUrl = "https://launchermeta.mojang.com/mc/game/version_manifest.json";
+
 	public Task<string?> Task { get; }
 	public event EventHandler<DownloadProgressEventArgs>? DownloadProgress;
 	public event EventHandler? Completed;
@@ -20,9 +20,7 @@ sealed class MinecraftServerExecutableDownloader {
 	private readonly CancellationTokenSource cancellationTokenSource = new ();
 	private int listeners = 0;
 
-	public MinecraftServerExecutableDownloader(MinecraftVersions minecraftVersions, string version, string filePath, MinecraftServerExecutableDownloadListener listener) {
-		this.minecraftVersions = minecraftVersions;
-		
+	public MinecraftServerExecutableDownloader(string version, string filePath, MinecraftServerExecutableDownloadListener listener) {
 		Register(listener);
 		Task = DownloadAndGetPath(version, filePath);
 		Task.ContinueWith(OnCompleted, TaskScheduler.Default);
@@ -75,18 +73,21 @@ sealed class MinecraftServerExecutableDownloader {
 	private async Task<string?> DownloadAndGetPath(string version, string filePath) {
 		Logger.Information("Downloading server version {Version}...", version);
 
+		HttpClient http = new HttpClient();
 		string tmpFilePath = filePath + ".tmp";
 
 		var cancellationToken = cancellationTokenSource.Token;
 		try {
-			var serverExecutableInfo = await minecraftVersions.GetServerExecutableInfo(version, cancellationToken);
-			if (serverExecutableInfo == null) {
-				return null;
-			}
+			Logger.Information("Fetching version manifest from: {Url}", VersionManifestUrl);
+			var versionManifest = await FetchVersionManifest(http, cancellationToken);
+			var metadataUrl = GetVersionMetadataUrlFromManifest(version, versionManifest);
+
+			Logger.Information("Fetching metadata for version {Version} from: {Url}", version, metadataUrl);
+			var versionMetadata = await FetchVersionMetadata(http, metadataUrl, cancellationToken);
+			var serverExecutableInfo = GetServerExecutableUrlFromMetadata(versionMetadata);
 
 			Logger.Information("Downloading server executable from: {Url} ({Size})", serverExecutableInfo.DownloadUrl, serverExecutableInfo.Size.ToHumanReadable(decimalPlaces: 1));
 			try {
-				using var http = new HttpClient();
 				await FetchServerExecutableFile(http, new DownloadProgressCallback(this), serverExecutableInfo, tmpFilePath, cancellationToken);
 			} catch (Exception) {
 				TryDeleteExecutableAfterFailure(tmpFilePath);
@@ -110,7 +111,31 @@ sealed class MinecraftServerExecutableDownloader {
 		}
 	}
 
-	private static async Task FetchServerExecutableFile(HttpClient http, DownloadProgressCallback progressCallback, MinecraftServerExecutableInfo info, string filePath, CancellationToken cancellationToken) {
+	private static async Task<JsonElement> FetchVersionManifest(HttpClient http, CancellationToken cancellationToken) {
+		try {
+			return await http.GetFromJsonAsync<JsonElement>(VersionManifestUrl, cancellationToken);
+		} catch (HttpRequestException e) {
+			Logger.Error(e, "Unable to download version manifest.");
+			throw StopProcedureException.Instance;
+		} catch (Exception e) {
+			Logger.Error(e, "Unable to parse version manifest as JSON.");
+			throw StopProcedureException.Instance;
+		}
+	}
+
+	private static async Task<JsonElement> FetchVersionMetadata(HttpClient http, string metadataUrl, CancellationToken cancellationToken) {
+		try {
+			return await http.GetFromJsonAsync<JsonElement>(metadataUrl, cancellationToken);
+		} catch (HttpRequestException e) {
+			Logger.Error(e, "Unable to download version metadata.");
+			throw StopProcedureException.Instance;
+		} catch (Exception e) {
+			Logger.Error(e, "Unable to parse version metadata as JSON.");
+			throw StopProcedureException.Instance;
+		}
+	}
+
+	private static async Task FetchServerExecutableFile(HttpClient http, DownloadProgressCallback progressCallback, ServerExecutableInfo info, string filePath, CancellationToken cancellationToken) {
 		Sha1String downloadedFileHash;
 
 		try {
@@ -145,6 +170,83 @@ sealed class MinecraftServerExecutableDownloader {
 		}
 	}
 
+	private static string GetVersionMetadataUrlFromManifest(string serverVersion, JsonElement versionManifest) {
+		JsonElement versionsElement = GetJsonPropertyOrThrow(versionManifest, "versions", JsonValueKind.Array, "version manifest");
+		JsonElement versionElement;
+		try {
+			versionElement = versionsElement.EnumerateArray().Single(ele => ele.TryGetProperty("id", out var id) && id.ValueKind == JsonValueKind.String && id.GetString() == serverVersion);
+		} catch (Exception) {
+			Logger.Error("Version {Version} was not found in version manifest.", serverVersion);
+			throw StopProcedureException.Instance;
+		}
+
+		JsonElement urlElement = GetJsonPropertyOrThrow(versionElement, "url", JsonValueKind.String, "version entry in version manifest");
+		string? url = urlElement.GetString();
+
+		if (!Uri.TryCreate(url, UriKind.Absolute, out var uri)) {
+			Logger.Error("The \"url\" key in version entry in version manifest does not contain a valid URL: {Url}", url);
+			throw StopProcedureException.Instance;
+		}
+
+		if (uri.Scheme != "https" || !uri.AbsolutePath.EndsWith(".json", StringComparison.OrdinalIgnoreCase)) {
+			Logger.Error("The \"url\" key in version entry in version manifest does not contain a accepted URL: {Url}", url);
+			throw StopProcedureException.Instance;
+		}
+
+		return url;
+	}
+
+	private static ServerExecutableInfo GetServerExecutableUrlFromMetadata(JsonElement versionMetadata) {
+		JsonElement downloadsElement = GetJsonPropertyOrThrow(versionMetadata, "downloads", JsonValueKind.Object, "version metadata");
+		JsonElement serverElement = GetJsonPropertyOrThrow(downloadsElement, "server", JsonValueKind.Object, "downloads object in version metadata");
+		JsonElement urlElement = GetJsonPropertyOrThrow(serverElement, "url", JsonValueKind.String, "downloads.server object in version metadata");
+		string? url = urlElement.GetString();
+
+		if (!Uri.TryCreate(url, UriKind.Absolute, out var uri)) {
+			Logger.Error("The \"url\" key in downloads.server object in version metadata does not contain a valid URL: {Url}", url);
+			throw StopProcedureException.Instance;
+		}
+
+		if (uri.Scheme != "https" || !uri.AbsolutePath.EndsWith(".jar", StringComparison.OrdinalIgnoreCase)) {
+			Logger.Error("The \"url\" key in downloads.server object in version metadata does not contain a accepted URL: {Url}", url);
+			throw StopProcedureException.Instance;
+		}
+
+		JsonElement sizeElement = GetJsonPropertyOrThrow(serverElement, "size", JsonValueKind.Number, "downloads.server object in version metadata");
+		ulong size;
+		try {
+			size = sizeElement.GetUInt64();
+		} catch (FormatException) {
+			Logger.Error("The \"size\" key in downloads.server object in version metadata contains an invalid file size: {Size}", sizeElement);
+			throw StopProcedureException.Instance;
+		}
+
+		JsonElement sha1Element = GetJsonPropertyOrThrow(serverElement, "sha1", JsonValueKind.String, "downloads.server object in version metadata");
+		Sha1String hash;
+		try {
+			hash = Sha1String.FromString(sha1Element.GetString());
+		} catch (Exception) {
+			Logger.Error("The \"sha1\" key in downloads.server object in version metadata does not contain a valid SHA-1 hash: {Sha1}", sha1Element.GetString());
+			throw StopProcedureException.Instance;
+		}
+
+		return new ServerExecutableInfo(url, hash, new FileSize(size));
+	}
+
+	private static JsonElement GetJsonPropertyOrThrow(JsonElement parentElement, string propertyKey, JsonValueKind expectedKind, string location) {
+		if (!parentElement.TryGetProperty(propertyKey, out var valueElement)) {
+			Logger.Error("Missing \"{Property}\" key in " + location + ".", propertyKey);
+			throw StopProcedureException.Instance;
+		}
+
+		if (valueElement.ValueKind != expectedKind) {
+			Logger.Error("The \"{Property}\" key in " + location + " does not contain a JSON {ExpectedType}. Actual type: {ActualType}", propertyKey, expectedKind, valueElement.ValueKind);
+			throw StopProcedureException.Instance;
+		}
+
+		return valueElement;
+	}
+
 	private sealed class MinecraftServerDownloadStreamCopier : IDisposable {
 		private readonly StreamCopier streamCopier = new ();
 		private readonly IncrementalHash sha1 = IncrementalHash.CreateHash(HashAlgorithmName.SHA1);
@@ -176,4 +278,10 @@ sealed class MinecraftServerExecutableDownloader {
 			streamCopier.Dispose();
 		}
 	}
+
+	private sealed class StopProcedureException : Exception {
+		public static StopProcedureException Instance { get; } = new ();
+
+		private StopProcedureException() {}
+	}
 }

Agent/Phantom.Agent.Minecraft/Server/MinecraftServerExecutables.cs

@@ -1,19 +1,15 @@
 using System.Text.RegularExpressions;
 using Phantom.Common.Logging;
-using Phantom.Common.Minecraft;
-using Phantom.Utils.IO;
 using Serilog;
 
 namespace Phantom.Agent.Minecraft.Server;
 
-public sealed partial class MinecraftServerExecutables : IDisposable {
+public sealed class MinecraftServerExecutables {
 	private static readonly ILogger Logger = PhantomLogger.Create<MinecraftServerExecutables>();
 
-	[GeneratedRegex(@"[^a-zA-Z0-9_\-\.]", RegexOptions.Compiled)]
-	private static partial Regex VersionFolderSanitizeRegex();
+	private static readonly Regex VersionFolderSanitizeRegex = new (@"[^a-zA-Z0-9_\-\.]", RegexOptions.Compiled);
 
 	private readonly string basePath;
-	private readonly MinecraftVersions minecraftVersions = new ();
 	private readonly Dictionary<string, MinecraftServerExecutableDownloader> runningDownloadersByVersion = new ();
 
 	public MinecraftServerExecutables(string basePath) {
@@ -21,7 +17,7 @@ public sealed partial class MinecraftServerExecutables : IDisposable {
 	}
 
 	internal async Task<string?> DownloadAndGetPath(string version, EventHandler<DownloadProgressEventArgs> progressEventHandler, CancellationToken cancellationToken) {
-		string serverExecutableFolderPath = Path.Combine(basePath, VersionFolderSanitizeRegex().Replace(version, "_"));
+		string serverExecutableFolderPath = Path.Combine(basePath, VersionFolderSanitizeRegex.Replace(version, "_"));
 		string serverExecutableFilePath = Path.Combine(serverExecutableFolderPath, "server.jar");
 
 		if (File.Exists(serverExecutableFilePath)) {
@@ -29,7 +25,7 @@ public sealed partial class MinecraftServerExecutables : IDisposable {
 		}
 
 		try {
-			Directories.Create(serverExecutableFolderPath, Chmod.URWX_GRX);
+			Directory.CreateDirectory(serverExecutableFolderPath);
 		} catch (Exception e) {
 			Logger.Error(e, "Unable to create folder for server executable: {ServerExecutableFolderPath}", serverExecutableFolderPath);
 			return null;
@@ -44,21 +40,17 @@ public sealed partial class MinecraftServerExecutables : IDisposable {
 				downloader.Register(listener);
 			}
 			else {
-				downloader = new MinecraftServerExecutableDownloader(minecraftVersions, version, serverExecutableFilePath, listener);
+				downloader = new MinecraftServerExecutableDownloader(version, serverExecutableFilePath, listener);
 				downloader.Completed += (_, _) => {
 					lock (this) {
 						runningDownloadersByVersion.Remove(version);
 					}
 				};
-
+				
 				runningDownloadersByVersion[version] = downloader;
 			}
 		}
 
 		return await downloader.Task.WaitAsync(cancellationToken);
 	}
-
-	public void Dispose() {
-		minecraftVersions.Dispose();
-	}
 }

Agent/Phantom.Agent.Minecraft/Server/ServerExecutableInfo.cs

@@ -1,9 +1,9 @@
 using Phantom.Utils.Cryptography;
 using Phantom.Utils.IO;
 
-namespace Phantom.Common.Minecraft; 
+namespace Phantom.Agent.Minecraft.Server; 
 
-public sealed record MinecraftServerExecutableInfo(
+sealed record ServerExecutableInfo(
 	string DownloadUrl,
 	Sha1String Hash,
 	FileSize Size

Agent/Phantom.Agent.Rpc/KeepAliveLoop.cs

@@ -1,40 +0,0 @@
-using Phantom.Common.Logging;
-using Phantom.Common.Messages.ToServer;
-using Serilog;
-
-namespace Phantom.Agent.Rpc;
-
-sealed class KeepAliveLoop {
-	private static readonly ILogger Logger = PhantomLogger.Create<KeepAliveLoop>();
-
-	private static readonly TimeSpan KeepAliveInterval = TimeSpan.FromSeconds(10);
-
-	private readonly RpcServerConnection connection;
-	private readonly CancellationTokenSource cancellationTokenSource = new ();
-
-	public KeepAliveLoop(RpcServerConnection connection) {
-		this.connection = connection;
-		Task.Run(Run);
-	}
-
-	private async Task Run() {
-		var cancellationToken = cancellationTokenSource.Token;
-
-		Logger.Information("Started keep-alive loop.");
-		try {
-			while (true) {
-				await Task.Delay(KeepAliveInterval, cancellationToken);
-				await connection.Send(new AgentIsAliveMessage());
-			}
-		} catch (OperationCanceledException) {
-			// Ignore.
-		} finally {
-			cancellationTokenSource.Dispose();
-			Logger.Information("Stopped keep-alive loop.");
-		}
-	}
-
-	public void Cancel() {
-		cancellationTokenSource.Cancel();
-	}
-}

Agent/Phantom.Agent.Rpc/Phantom.Agent.Rpc.csproj

@@ -6,6 +6,10 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   
+  <ItemGroup>
+    <PackageReference Include="Serilog" Version="2.12.0" />
+  </ItemGroup>
+  
   <ItemGroup>
     <ProjectReference Include="..\..\Common\Phantom.Common.Messages\Phantom.Common.Messages.csproj" />
   </ItemGroup>

Agent/Phantom.Agent.Rpc/RpcExtensions.cs

@@ -0,0 +1,19 @@
+using NetMQ;
+using NetMQ.Sockets;
+using Phantom.Common.Messages;
+using Phantom.Common.Messages.ToServer;
+
+namespace Phantom.Agent.Rpc; 
+
+public static class RpcExtensions {
+	internal static async Task SendMessage<TMessage>(this ClientSocket socket, TMessage message) where TMessage : IMessageToServer {
+		byte[] bytes = MessageRegistries.ToServer.Write(message).ToArray();
+		if (bytes.Length > 0) {
+			await socket.SendAsync(bytes);
+		}
+	}
+	
+	public static Task SendSimpleReply<TMessage, TReplyEnum>(this ClientSocket socket, TMessage message, TReplyEnum reply) where TMessage : IMessageWithReply where TReplyEnum : Enum {
+		return SendMessage(socket, SimpleReplyMessage.FromEnum(message.SequenceId, reply));
+	}
+}

Agent/Phantom.Agent.Rpc/RpcLauncher.cs

@@ -2,45 +2,36 @@
 using NetMQ.Sockets;
 using Phantom.Common.Data.Agent;
 using Phantom.Common.Messages;
-using Phantom.Common.Messages.BiDirectional;
 using Phantom.Common.Messages.ToServer;
 using Phantom.Utils.Rpc;
-using Phantom.Utils.Rpc.Message;
-using Phantom.Utils.Runtime;
-using Serilog;
 using Serilog.Events;
 
 namespace Phantom.Agent.Rpc;
 
 public sealed class RpcLauncher : RpcRuntime<ClientSocket> {
-	public static async Task Launch(RpcConfiguration config, AgentAuthToken authToken, AgentInfo agentInfo, Func<RpcServerConnection, IMessageToAgentListener> listenerFactory, SemaphoreSlim disconnectSemaphore, CancellationToken receiveCancellationToken) {
+	public static async Task Launch(RpcConfiguration config, AgentAuthToken authToken, AgentInfo agentInfo, Func<ClientSocket, IMessageToAgentListener> listenerFactory) {
 		var socket = new ClientSocket();
 		var options = socket.Options;
 
 		options.CurveServerCertificate = config.ServerCertificate;
 		options.CurveCertificate = new NetMQCertificate();
 		options.HelloMessage = MessageRegistries.ToServer.Write(new RegisterAgentMessage(authToken, agentInfo)).ToArray();
-
-		await new RpcLauncher(config, socket, agentInfo.Guid, listenerFactory, disconnectSemaphore, receiveCancellationToken).Launch();
+		
+		await new RpcLauncher(config, socket, agentInfo.Guid, listenerFactory).Launch();
 	}
 
 	private readonly RpcConfiguration config;
 	private readonly Guid agentGuid;
-	private readonly Func<RpcServerConnection, IMessageToAgentListener> messageListenerFactory;
+	private readonly Func<ClientSocket, IMessageToAgentListener> messageListenerFactory;
 
-	private readonly SemaphoreSlim disconnectSemaphore;
-	private readonly CancellationToken receiveCancellationToken;
-
-	private RpcLauncher(RpcConfiguration config, ClientSocket socket, Guid agentGuid, Func<RpcServerConnection, IMessageToAgentListener> messageListenerFactory, SemaphoreSlim disconnectSemaphore, CancellationToken receiveCancellationToken) : base(config, socket) {
+	private RpcLauncher(RpcConfiguration config, ClientSocket socket, Guid agentGuid, Func<ClientSocket, IMessageToAgentListener> messageListenerFactory) : base(socket, config.CancellationToken) {
 		this.config = config;
 		this.agentGuid = agentGuid;
 		this.messageListenerFactory = messageListenerFactory;
-		this.disconnectSemaphore = disconnectSemaphore;
-		this.receiveCancellationToken = receiveCancellationToken;
 	}
 
 	protected override void Connect(ClientSocket socket) {
-		var logger = config.RuntimeLogger;
+		var logger = config.Logger;
 		var url = config.TcpUrl;
 
 		logger.Information("Starting ZeroMQ client and connecting to {Url}...", url);
@@ -48,60 +39,35 @@ public sealed class RpcLauncher : RpcRuntime<ClientSocket> {
 		logger.Information("ZeroMQ client ready.");
 	}
 
-	protected override void Run(ClientSocket socket, MessageReplyTracker replyTracker, TaskManager taskManager) {
-		var connection = new RpcServerConnection(socket, replyTracker);
-		ServerMessaging.SetCurrentConnection(connection);
+	protected override async Task Run(ClientSocket socket, CancellationToken cancellationToken) {
+		var logger = config.Logger;
 		
-		var logger = config.RuntimeLogger;
-		var handler = new MessageToAgentHandler(messageListenerFactory(connection), logger, taskManager, receiveCancellationToken);
-		var keepAliveLoop = new KeepAliveLoop(connection);
+		var listener = messageListenerFactory(socket);
+		
+		ServerMessaging.SetCurrentSocket(socket, cancellationToken);
 
-		try {
-			while (!receiveCancellationToken.IsCancellationRequested) {
-				var data = socket.Receive(receiveCancellationToken);
-				
-				LogMessageType(logger, data);
-				
-				if (data.Length > 0) {
-					MessageRegistries.ToAgent.Handle(data, handler);
+		// TODO optimize msg
+		await foreach (var bytes in socket.ReceiveBytesAsyncEnumerable(cancellationToken)) {
+			if (logger.IsEnabled(LogEventLevel.Verbose)) {
+				if (bytes.Length > 0 && MessageRegistries.ToAgent.TryGetType(bytes, out var type)) {
+					logger.Verbose("Received {MessageType} ({Bytes} B) from server.", type.Name, bytes.Length);
+				}
+				else {
+					logger.Verbose("Received {Bytes} B message from server.", bytes.Length);
 				}
 			}
-		} catch (OperationCanceledException) {
-			// Ignore.
-		} finally {
-			logger.Verbose("ZeroMQ client stopped receiving messages.");
 
-			disconnectSemaphore.Wait(CancellationToken.None);
-			keepAliveLoop.Cancel();
+			if (bytes.Length > 0) {
+				MessageRegistries.ToAgent.Handle(bytes, listener, cancellationToken);
+			}
 		}
 	}
 
-	private static void LogMessageType(ILogger logger, ReadOnlyMemory<byte> data) {
-		if (!logger.IsEnabled(LogEventLevel.Verbose)) {
-			return;
-		}
-
-		if (data.Length > 0 && MessageRegistries.ToAgent.TryGetType(data, out var type)) {
-			logger.Verbose("Received {MessageType} ({Bytes} B) from server.", type.Name, data.Length);
-		}
-		else {
-			logger.Verbose("Received {Bytes} B message from server.", data.Length);
-		}
-	}
-
-	protected override async Task Disconnect() {
-		var unregisterTimeoutTask = Task.Delay(TimeSpan.FromSeconds(5), CancellationToken.None);
-		var finishedTask = await Task.WhenAny(ServerMessaging.Send(new UnregisterAgentMessage(agentGuid)), unregisterTimeoutTask);
-		if (finishedTask == unregisterTimeoutTask) {
-			config.RuntimeLogger.Error("Timed out communicating agent shutdown with the server.");
-		}
-	}
-
-	private sealed class MessageToAgentHandler : MessageHandler<IMessageToAgentListener> {
-		public MessageToAgentHandler(IMessageToAgentListener listener, ILogger logger, TaskManager taskManager, CancellationToken cancellationToken) : base(listener, logger, taskManager, cancellationToken) {}
-		
-		protected override Task SendReply(uint sequenceId, byte[] serializedReply) {
-			return ServerMessaging.Send(new ReplyMessage(sequenceId, serializedReply));
+	protected override async Task Disconnect(ClientSocket socket) {
+		var timeoutTask = Task.Delay(TimeSpan.FromSeconds(5));
+		var finishedTask = await Task.WhenAny(socket.SendMessage(new UnregisterAgentMessage(agentGuid)), timeoutTask);
+		if (finishedTask == timeoutTask) {
+			config.Logger.Error("Timed out communicating agent shutdown with the server.");
 		}
 	}
 }

Agent/Phantom.Agent.Rpc/RpcServerConnection.cs

@@ -1,41 +0,0 @@
-using NetMQ;
-using NetMQ.Sockets;
-using Phantom.Common.Messages;
-using Phantom.Common.Messages.BiDirectional;
-using Phantom.Utils.Rpc.Message;
-
-namespace Phantom.Agent.Rpc; 
-
-public sealed class RpcServerConnection {
-	private readonly ClientSocket socket;
-	private readonly MessageReplyTracker replyTracker;
-
-	internal RpcServerConnection(ClientSocket socket, MessageReplyTracker replyTracker) {
-		this.socket = socket;
-		this.replyTracker = replyTracker;
-	}
-
-	internal async Task Send<TMessage>(TMessage message) where TMessage : IMessageToServer {
-		var bytes = MessageRegistries.ToServer.Write(message).ToArray();
-		if (bytes.Length > 0) {
-			await socket.SendAsync(bytes);
-		}
-	}
-
-	internal async Task<TReply?> Send<TMessage, TReply>(TMessage message, TimeSpan waitForReplyTime, CancellationToken waitForReplyCancellationToken) where TMessage : IMessageToServer<TReply> where TReply : class {
-		var sequenceId = replyTracker.RegisterReply();
-		
-		var bytes = MessageRegistries.ToServer.Write<TMessage, TReply>(sequenceId, message).ToArray();
-		if (bytes.Length == 0) {
-			replyTracker.ForgetReply(sequenceId);
-			return null;
-		}
-
-		await socket.SendAsync(bytes);
-		return await replyTracker.WaitForReply<TReply>(sequenceId, waitForReplyTime, waitForReplyCancellationToken);
-	}
-
-	public void Receive(ReplyMessage message) {
-		replyTracker.ReceiveReply(message.SequenceId, message.SerializedReply);
-	}
-}

Agent/Phantom.Agent.Rpc/ServerMessaging.cs

@@ -1,34 +1,55 @@
-using Phantom.Common.Logging;
+using NetMQ.Sockets;
+using Phantom.Common.Logging;
 using Phantom.Common.Messages;
+using Phantom.Common.Messages.ToServer;
 using Serilog;
 
 namespace Phantom.Agent.Rpc;
 
 public static class ServerMessaging {
-	private static readonly ILogger Logger = PhantomLogger.Create(nameof(ServerMessaging));
+	private static readonly ILogger Logger = PhantomLogger.Create(typeof(ServerMessaging));
 	
-	private static RpcServerConnection? CurrentConnection { get; set; }
-	private static RpcServerConnection CurrentConnectionOrThrow => CurrentConnection ?? throw new InvalidOperationException("Server connection not ready.");
-	
-	private static readonly object SetCurrentConnectionLock = new ();
+	private static readonly TimeSpan KeepAliveInterval = TimeSpan.FromSeconds(10);
 
-	internal static void SetCurrentConnection(RpcServerConnection connection) {
-		lock (SetCurrentConnectionLock) {
-			if (CurrentConnection != null) {
-				throw new InvalidOperationException("Server connection can only be set once.");
-			}
-			
-			CurrentConnection = connection;
-		}
+	private static ClientSocket? CurrentSocket { get; set; }
+	private static readonly object SetCurrentSocketLock = new ();
+
+	internal static void SetCurrentSocket(ClientSocket socket, CancellationToken cancellationToken) {
+		Logger.Information("Server socket ready.");
 		
-		Logger.Information("Server connection ready.");
+		bool isFirstSet = false;
+		lock (SetCurrentSocketLock) {
+			if (CurrentSocket == null) {
+				isFirstSet = true;
+			}
+
+			CurrentSocket = socket;
+		}
+
+		if (isFirstSet) {
+			Task.Factory.StartNew(static o => SendKeepAliveLoop((CancellationToken) o!), cancellationToken, cancellationToken, TaskCreationOptions.LongRunning, TaskScheduler.Default);
+		}
 	}
 
-	public static Task Send<TMessage>(TMessage message) where TMessage : IMessageToServer {
-		return CurrentConnectionOrThrow.Send(message);
+	public static async Task SendMessage<TMessage>(TMessage message) where TMessage : IMessageToServer {
+		var currentSocket = CurrentSocket ?? throw new InvalidOperationException("Server socket not ready.");
+		await currentSocket.SendMessage(message);
 	}
 
-	public static Task<TReply?> Send<TMessage, TReply>(TMessage message, TimeSpan waitForReplyTime, CancellationToken waitForReplyCancellationToken) where TMessage : IMessageToServer<TReply> where TReply : class {
-		return CurrentConnectionOrThrow.Send<TMessage, TReply>(message, waitForReplyTime, waitForReplyCancellationToken);
+	private static async Task SendKeepAliveLoop(CancellationToken cancellationToken) {
+		try {
+			while (true) {
+				await Task.Delay(KeepAliveInterval, cancellationToken);
+
+				var currentSocket = CurrentSocket;
+				if (currentSocket != null) {
+					await currentSocket.SendMessage(new AgentIsAliveMessage());
+				}
+			}
+		} catch (OperationCanceledException) {
+			// Ignore.
+		} finally {
+			Logger.Information("Stopped keep-alive loop.");
+		}
 	}
 }

Agent/Phantom.Agent.Services/AgentServices.cs

@@ -1,26 +1,19 @@
 using Phantom.Agent.Minecraft.Java;
 using Phantom.Agent.Services.Instances;
 using Phantom.Common.Data.Agent;
-using Phantom.Common.Logging;
-using Phantom.Utils.Runtime;
-using Serilog;
 
 namespace Phantom.Agent.Services;
 
 public sealed class AgentServices {
-	private static readonly ILogger Logger = PhantomLogger.Create<AgentServices>();
-	
 	private AgentFolders AgentFolders { get; }
-	private TaskManager TaskManager { get; }
-
+	
 	internal JavaRuntimeRepository JavaRuntimeRepository { get; }
 	internal InstanceSessionManager InstanceSessionManager { get; }
 
 	public AgentServices(AgentInfo agentInfo, AgentFolders agentFolders) {
 		this.AgentFolders = agentFolders;
-		this.TaskManager = new TaskManager(PhantomLogger.Create<TaskManager, AgentServices>());
 		this.JavaRuntimeRepository = new JavaRuntimeRepository();
-		this.InstanceSessionManager = new InstanceSessionManager(agentInfo, agentFolders, JavaRuntimeRepository, TaskManager);
+		this.InstanceSessionManager = new InstanceSessionManager(agentInfo, agentFolders, JavaRuntimeRepository);
 	}
 
 	public async Task Initialize() {
@@ -30,11 +23,6 @@ public sealed class AgentServices {
 	}
 
 	public async Task Shutdown() {
-		Logger.Information("Stopping services...");
-		
 		await InstanceSessionManager.StopAll();
-		await TaskManager.Stop();
-		
-		Logger.Information("Services stopped.");
 	}
 }

Agent/Phantom.Agent.Services/Instances/Instance.cs

@@ -2,7 +2,6 @@
 using Phantom.Agent.Rpc;
 using Phantom.Agent.Services.Instances.States;
 using Phantom.Common.Data.Instance;
-using Phantom.Common.Data.Minecraft;
 using Phantom.Common.Data.Replies;
 using Phantom.Common.Logging;
 using Phantom.Common.Messages.ToServer;
@@ -33,7 +32,7 @@ sealed class Instance : IDisposable {
 	private readonly LaunchServices launchServices;
 	private readonly PortManager portManager;
 
-	private IInstanceStatus currentStatus;
+	private InstanceStatus currentStatus;
 	private IInstanceState currentState;
 	private readonly SemaphoreSlim stateTransitioningActionSemaphore = new (1, 1);
 
@@ -47,31 +46,24 @@ sealed class Instance : IDisposable {
 		this.launchServices = launchServices;
 		this.portManager = portManager;
 		this.currentState = new InstanceNotRunningState();
-		this.currentStatus = InstanceStatus.NotRunning;
+		this.currentStatus = InstanceStatus.IsNotRunning;
 	}
 
 	private async Task ReportLastStatus() {
-		await ServerMessaging.Send(new ReportInstanceStatusMessage(Configuration.InstanceGuid, currentStatus));
+		await ServerMessaging.SendMessage(new ReportInstanceStatusMessage(Configuration.InstanceGuid, currentStatus));
 	}
 	
-	private void TransitionState(IInstanceState newState) {
+	private bool TransitionState(IInstanceState newState) {
 		if (currentState == newState) {
-			return;
+			return false;
 		}
 
 		if (currentState is IDisposable disposable) {
 			disposable.Dispose();
 		}
 
-		logger.Verbose("Transitioning instance state to: {NewState}", newState.GetType().Name);
-		
 		currentState = newState;
-		currentState.Initialize();
-	}
-
-	private T TransitionStateAndReturn<T>((IInstanceState State, T Result) newStateAndResult) {
-		TransitionState(newStateAndResult.State);
-		return newStateAndResult.Result;
+		return true;
 	}
 
 	public async Task Reconfigure(InstanceConfiguration configuration, BaseLauncher launcher, CancellationToken cancellationToken) {
@@ -85,32 +77,44 @@ sealed class Instance : IDisposable {
 		}
 	}
 
-	public async Task<LaunchInstanceResult> Launch(CancellationToken shutdownCancellationToken) {
-		await stateTransitioningActionSemaphore.WaitAsync(shutdownCancellationToken);
+	public async Task<LaunchInstanceResult> Launch(CancellationToken cancellationToken) {
+		await stateTransitioningActionSemaphore.WaitAsync(cancellationToken);
 		try {
-			return TransitionStateAndReturn(currentState.Launch(new InstanceContextImpl(this, shutdownCancellationToken)));
-		} catch (Exception e) {
-			logger.Error(e, "Caught exception while launching instance.");
-			return LaunchInstanceResult.UnknownError;
+			if (TransitionState(currentState.Launch(new InstanceContextImpl(this)))) {
+				return LaunchInstanceResult.LaunchInitiated;
+			}
+
+			return currentState switch {
+				InstanceLaunchingState => LaunchInstanceResult.InstanceAlreadyLaunching,
+				InstanceRunningState   => LaunchInstanceResult.InstanceAlreadyRunning,
+				InstanceStoppingState  => LaunchInstanceResult.InstanceIsStopping,
+				_                      => LaunchInstanceResult.UnknownError
+			};
 		} finally {
 			stateTransitioningActionSemaphore.Release();
 		}
 	}
 
-	public async Task<StopInstanceResult> Stop(MinecraftStopStrategy stopStrategy) {
+	public async Task<StopInstanceResult> Stop() {
 		await stateTransitioningActionSemaphore.WaitAsync();
 		try {
-			return TransitionStateAndReturn(currentState.Stop(stopStrategy));
-		} catch (Exception e) {
-			logger.Error(e, "Caught exception while stopping instance.");
-			return StopInstanceResult.UnknownError;
+			if (TransitionState(currentState.Stop())) {
+				return StopInstanceResult.StopInitiated;
+			}
+
+			return currentState switch {
+				InstanceNotRunningState => StopInstanceResult.InstanceAlreadyStopped,
+				InstanceLaunchingState  => StopInstanceResult.StopInitiated,
+				InstanceStoppingState   => StopInstanceResult.InstanceAlreadyStopping,
+				_                       => StopInstanceResult.UnknownError
+			};
 		} finally {
 			stateTransitioningActionSemaphore.Release();
 		}
 	}
 
 	public async Task StopAndWait(TimeSpan waitTime) {
-		await Stop(MinecraftStopStrategy.Instant);
+		await Stop();
 
 		using var waitTokenSource = new CancellationTokenSource(waitTime);
 		var waitToken = waitTokenSource.Token;
@@ -126,13 +130,10 @@ sealed class Instance : IDisposable {
 
 	private sealed class InstanceContextImpl : InstanceContext {
 		private readonly Instance instance;
-		private readonly CancellationToken shutdownCancellationToken;
-		
 		private int statusUpdateCounter;
 
-		public InstanceContextImpl(Instance instance, CancellationToken shutdownCancellationToken) : base(instance.Configuration, instance.Launcher) {
+		public InstanceContextImpl(Instance instance) : base(instance.Configuration, instance.Launcher) {
 			this.instance = instance;
-			this.shutdownCancellationToken = shutdownCancellationToken;
 		}
 
 		public override LaunchServices LaunchServices => instance.launchServices;
@@ -140,33 +141,21 @@ sealed class Instance : IDisposable {
 		public override ILogger Logger => instance.logger;
 		public override string ShortName => instance.shortName;
 
-		public override void ReportStatus(IInstanceStatus newStatus) {
+		public override void ReportStatus(InstanceStatus newStatus) {
 			int myStatusUpdateCounter = Interlocked.Increment(ref statusUpdateCounter);
 			
-			instance.launchServices.TaskManager.Run("Report status of instance " + instance.shortName + " as " + newStatus.GetType().Name, async () => {
+			Task.Run(async () => {
 				if (myStatusUpdateCounter == statusUpdateCounter) {
 					instance.currentStatus = newStatus;
-					await ServerMessaging.Send(new ReportInstanceStatusMessage(Configuration.InstanceGuid, newStatus));
+					await ServerMessaging.SendMessage(new ReportInstanceStatusMessage(Configuration.InstanceGuid, newStatus));
 				}
 			});
 		}
 
-		public override void TransitionState(Func<(IInstanceState, IInstanceStatus?)> newStateAndStatus) {
-			instance.stateTransitioningActionSemaphore.Wait(CancellationToken.None);
+		public override void TransitionState(Func<IInstanceState> newState) {
+			instance.stateTransitioningActionSemaphore.Wait();
 			try {
-				var (state, status) = newStateAndStatus();
-				if (state is not InstanceNotRunningState && shutdownCancellationToken.IsCancellationRequested) {
-					instance.logger.Verbose("Cancelled state transition to {State} due to Agent shutdown.", state.GetType().Name);
-					return;
-				}
-
-				if (status != null) {
-					ReportStatus(status);
-				}
-
-				instance.TransitionState(state);
-			} catch (Exception e) {
-				instance.logger.Error(e, "Caught exception during state transition.");
+				instance.TransitionState(newState());
 			} finally {
 				instance.stateTransitioningActionSemaphore.Release();
 			}

Agent/Phantom.Agent.Services/Instances/InstanceContext.cs

@@ -19,10 +19,10 @@ abstract class InstanceContext {
 		Launcher = launcher;
 	}
 
-	public abstract void ReportStatus(IInstanceStatus newStatus);
-	public abstract void TransitionState(Func<(IInstanceState, IInstanceStatus?)> newStateAndStatus);
+	public abstract void ReportStatus(InstanceStatus newStatus);
+	public abstract void TransitionState(Func<IInstanceState> newState);
 
-	public void TransitionState(IInstanceState newState, IInstanceStatus? newStatus = null) {
-		TransitionState(() => (newState, newStatus));
+	public void TransitionState(IInstanceState newState) {
+		TransitionState(() => newState);
 	}
 }

Agent/Phantom.Agent.Services/Instances/InstanceLogSender.cs

@@ -1,96 +0,0 @@
-using System.Collections.Immutable;
-using Phantom.Agent.Rpc;
-using Phantom.Common.Logging;
-using Phantom.Common.Messages.ToServer;
-using Phantom.Utils.Collections;
-using Phantom.Utils.Runtime;
-using Serilog;
-
-namespace Phantom.Agent.Services.Instances;
-
-sealed class InstanceLogSender {
-	private static readonly TimeSpan SendDelay = TimeSpan.FromMilliseconds(200);
-
-	private readonly Guid instanceGuid;
-	private readonly ILogger logger;
-	private readonly CancellationTokenSource cancellationTokenSource;
-	private readonly CancellationToken cancellationToken;
-
-	private readonly SemaphoreSlim semaphore = new (1, 1);
-	private readonly RingBuffer<string> buffer = new (1000);
-
-	public InstanceLogSender(TaskManager taskManager, Guid instanceGuid, string name) {
-		this.instanceGuid = instanceGuid;
-		this.logger = PhantomLogger.Create<InstanceLogSender>(name);
-		this.cancellationTokenSource = new CancellationTokenSource();
-		this.cancellationToken = cancellationTokenSource.Token;
-		taskManager.Run("Instance log sender for " + name, Run);
-	}
-
-	private async Task Run() {
-		logger.Verbose("Task started.");
-
-		try {
-			try {
-				while (!cancellationToken.IsCancellationRequested) {
-					await SendOutputToServer(await DequeueOrThrow());
-					await Task.Delay(SendDelay, cancellationToken);
-				}
-			} catch (OperationCanceledException) {
-				// Ignore.
-			}
-
-			// Flush remaining lines.
-			await SendOutputToServer(DequeueWithoutSemaphore());
-		} catch (Exception e) {
-			logger.Error(e, "Caught exception in task.");
-		} finally {
-			cancellationTokenSource.Dispose();
-			logger.Verbose("Task stopped.");
-		}
-	}
-
-	private async Task SendOutputToServer(ImmutableArray<string> lines) {
-		if (!lines.IsEmpty) {
-			await ServerMessaging.Send(new InstanceOutputMessage(instanceGuid, lines));
-		}
-	}
-
-	private ImmutableArray<string> DequeueWithoutSemaphore() {
-		ImmutableArray<string> lines = buffer.Count > 0 ? buffer.EnumerateLast(uint.MaxValue).ToImmutableArray() : ImmutableArray<string>.Empty;
-		buffer.Clear();
-		return lines;
-	}
-
-	private async Task<ImmutableArray<string>> DequeueOrThrow() {
-		await semaphore.WaitAsync(cancellationToken);
-
-		try {
-			return DequeueWithoutSemaphore();
-		} finally {
-			semaphore.Release();
-		}
-	}
-
-	public void Enqueue(string line) {
-		try {
-			semaphore.Wait(cancellationToken);
-		} catch (Exception) {
-			return;
-		}
-
-		try {
-			buffer.Add(line);
-		} finally {
-			semaphore.Release();
-		}
-	}
-
-	public void Cancel() {
-		try {
-			cancellationTokenSource.Cancel();
-		} catch (ObjectDisposedException) {
-			// Ignore.
-		}
-	}
-}

Agent/Phantom.Agent.Services/Instances/InstanceLogSenderThread.cs

@@ -0,0 +1,84 @@
+using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
+using Phantom.Agent.Rpc;
+using Phantom.Common.Logging;
+using Phantom.Common.Messages.ToServer;
+using Phantom.Utils.Collections;
+using Serilog;
+
+namespace Phantom.Agent.Services.Instances; 
+
+sealed class InstanceLogSenderThread {
+	private readonly Guid instanceGuid;
+	private readonly ILogger logger;
+	private readonly CancellationTokenSource cancellationTokenSource;
+	private readonly CancellationToken cancellationToken;
+	
+	private readonly SemaphoreSlim semaphore = new (1, 1);
+	private readonly RingBuffer<string> buffer = new (1000);
+	
+	public InstanceLogSenderThread(Guid instanceGuid, string name) {
+		this.instanceGuid = instanceGuid;
+		this.logger = PhantomLogger.Create<InstanceLogSenderThread>(name);
+		this.cancellationTokenSource = new CancellationTokenSource();
+		this.cancellationToken = cancellationTokenSource.Token;
+		
+		var thread = new Thread(Run) {
+			IsBackground = true,
+			Name = "Instance Log Sender (" + name + ")"
+		};
+		
+		thread.Start();
+	}
+
+	[SuppressMessage("ReSharper", "LocalVariableHidesMember")]
+	private async void Run() {
+		logger.Verbose("Thread started.");
+		
+		try {
+			while (!cancellationToken.IsCancellationRequested) {
+				await semaphore.WaitAsync(cancellationToken);
+
+				ImmutableArray<string> lines;
+				
+				try {
+					lines = buffer.Count > 0 ? buffer.EnumerateLast(uint.MaxValue).ToImmutableArray() : ImmutableArray<string>.Empty;
+					buffer.Clear();
+				} finally {
+					semaphore.Release();
+				}
+
+				if (lines.Length > 0) {
+					await ServerMessaging.SendMessage(new InstanceOutputMessage(instanceGuid, lines));
+				}
+
+				await Task.Delay(TimeSpan.FromMilliseconds(200), cancellationToken);
+			}
+		} catch (OperationCanceledException) {
+			// Ignore.
+		} catch (Exception e) {
+			logger.Error(e, "Caught exception in thread.");
+		} finally {
+			cancellationTokenSource.Dispose();
+			logger.Verbose("Thread stopped.");
+		}
+	}
+
+	public void Enqueue(string line) {
+		try {
+			semaphore.Wait(cancellationToken);
+		} catch (Exception) {
+			return;
+		}
+
+		try {
+			buffer.Add(line);
+		} finally {
+			semaphore.Release();
+		}
+	}
+
+	public void Cancel() {
+		cancellationTokenSource.Cancel();
+	}
+}

Agent/Phantom.Agent.Services/Instances/InstanceSessionManager.cs

@@ -1,5 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-using Phantom.Agent.Minecraft.Instance;
+using Phantom.Agent.Minecraft.Instance;
 using Phantom.Agent.Minecraft.Java;
 using Phantom.Agent.Minecraft.Launcher;
 using Phantom.Agent.Minecraft.Launcher.Types;
@@ -8,11 +7,8 @@ using Phantom.Agent.Minecraft.Server;
 using Phantom.Common.Data;
 using Phantom.Common.Data.Agent;
 using Phantom.Common.Data.Instance;
-using Phantom.Common.Data.Minecraft;
 using Phantom.Common.Data.Replies;
 using Phantom.Common.Logging;
-using Phantom.Utils.IO;
-using Phantom.Utils.Runtime;
 using Serilog;
 
 namespace Phantom.Agent.Services.Instances;
@@ -23,7 +19,6 @@ sealed class InstanceSessionManager : IDisposable {
 	private readonly AgentInfo agentInfo;
 	private readonly string basePath;
 
-	private readonly MinecraftServerExecutables minecraftServerExecutables;
 	private readonly LaunchServices launchServices;
 	private readonly PortManager portManager;
 	private readonly Dictionary<Guid, Instance> instances = new ();
@@ -32,53 +27,32 @@ sealed class InstanceSessionManager : IDisposable {
 	private readonly CancellationToken shutdownCancellationToken;
 	private readonly SemaphoreSlim semaphore = new (1, 1);
 
-	public InstanceSessionManager(AgentInfo agentInfo, AgentFolders agentFolders, JavaRuntimeRepository javaRuntimeRepository, TaskManager taskManager) {
+	public InstanceSessionManager(AgentInfo agentInfo, AgentFolders agentFolders, JavaRuntimeRepository javaRuntimeRepository) {
 		this.agentInfo = agentInfo;
 		this.basePath = agentFolders.InstancesFolderPath;
-		this.minecraftServerExecutables = new MinecraftServerExecutables(agentFolders.ServerExecutableFolderPath);
-		this.launchServices = new LaunchServices(taskManager, minecraftServerExecutables, javaRuntimeRepository);
+		this.launchServices = new LaunchServices(new MinecraftServerExecutables(agentFolders.ServerExecutableFolderPath), javaRuntimeRepository);
 		this.portManager = new PortManager(agentInfo.AllowedServerPorts, agentInfo.AllowedRconPorts);
 		this.shutdownCancellationToken = shutdownCancellationTokenSource.Token;
 	}
 
-	private async Task<InstanceActionResult<T>> AcquireSemaphoreAndRun<T>(Func<Task<InstanceActionResult<T>>> func) {
+	public async Task<ConfigureInstanceResult> Configure(InstanceConfiguration configuration) {
 		try {
 			await semaphore.WaitAsync(shutdownCancellationToken);
-
-			try {
-				return await func();
-			} finally {
-				semaphore.Release();
-			}
 		} catch (OperationCanceledException) {
-			return InstanceActionResult.General<T>(InstanceActionGeneralResult.AgentShuttingDown);
+			return ConfigureInstanceResult.AgentShuttingDown;
 		}
-	}
 
-	[SuppressMessage("ReSharper", "ConvertIfStatementToReturnStatement")]
-	private Task<InstanceActionResult<T>> AcquireSemaphoreAndRunWithInstance<T>(Guid instanceGuid, Func<Instance, Task<T>> func) {
-		return AcquireSemaphoreAndRun(async () => {
-			if (instances.TryGetValue(instanceGuid, out var instance)) {
-				return InstanceActionResult.Concrete(await func(instance));
-			}
-			else {
-				return InstanceActionResult.General<T>(InstanceActionGeneralResult.InstanceDoesNotExist);
-			}
-		});
-	}
+		var instanceGuid = configuration.InstanceGuid;
 
-	public async Task<InstanceActionResult<ConfigureInstanceResult>> Configure(InstanceConfiguration configuration) {
-		return await AcquireSemaphoreAndRun(async () => {
-			var instanceGuid = configuration.InstanceGuid;
-			
+		try {
 			var otherInstances = instances.Values.Where(inst => inst.Configuration.InstanceGuid != instanceGuid).ToArray();
 			if (otherInstances.Length + 1 > agentInfo.MaxInstances) {
-				return InstanceActionResult.Concrete(ConfigureInstanceResult.InstanceLimitExceeded);
+				return ConfigureInstanceResult.InstanceLimitExceeded;
 			}
 
 			var availableMemory = agentInfo.MaxMemory - otherInstances.Aggregate(RamAllocationUnits.Zero, static (total, instance) => total + instance.Configuration.MemoryAllocation);
 			if (availableMemory < configuration.MemoryAllocation) {
-				return InstanceActionResult.Concrete(ConfigureInstanceResult.MemoryLimitExceeded);
+				return ConfigureInstanceResult.MemoryLimitExceeded;
 			}
 
 			var heapMegabytes = configuration.MemoryAllocation.InMegabytes;
@@ -88,12 +62,11 @@ sealed class InstanceSessionManager : IDisposable {
 			);
 
 			var instanceFolder = Path.Combine(basePath, instanceGuid.ToString());
-			Directories.Create(instanceFolder, Chmod.URWX_GRX);
+			Directory.CreateDirectory(instanceFolder);
 
 			var properties = new InstanceProperties(
 				configuration.JavaRuntimeGuid,
 				jvmProperties,
-				configuration.JvmArguments,
 				instanceFolder,
 				configuration.MinecraftVersion,
 				new ServerProperties(configuration.ServerPort, configuration.RconPort)
@@ -114,26 +87,74 @@ sealed class InstanceSessionManager : IDisposable {
 				await instance.Launch(shutdownCancellationToken);
 			}
 
-			return InstanceActionResult.Concrete(ConfigureInstanceResult.Success);
-		});
+			return ConfigureInstanceResult.Success;
+		} finally {
+			semaphore.Release();
+		}
 	}
 
-	public Task<InstanceActionResult<LaunchInstanceResult>> Launch(Guid instanceGuid) {
-		return AcquireSemaphoreAndRunWithInstance(instanceGuid, instance => instance.Launch(shutdownCancellationToken));
+	public async Task<LaunchInstanceResult> Launch(Guid instanceGuid) {
+		try {
+			await semaphore.WaitAsync(shutdownCancellationToken);
+		} catch (OperationCanceledException) {
+			return LaunchInstanceResult.AgentShuttingDown;
+		}
+
+		try {
+			if (!instances.TryGetValue(instanceGuid, out var instance)) {
+				return LaunchInstanceResult.InstanceDoesNotExist;
+			}
+			else {
+				return await instance.Launch(shutdownCancellationToken);
+			}
+		} finally {
+			semaphore.Release();
+		}
 	}
 
-	public Task<InstanceActionResult<StopInstanceResult>> Stop(Guid instanceGuid, MinecraftStopStrategy stopStrategy) {
-		return AcquireSemaphoreAndRunWithInstance(instanceGuid, instance => instance.Stop(stopStrategy));
+	public async Task<StopInstanceResult> Stop(Guid instanceGuid) {
+		try {
+			await semaphore.WaitAsync(shutdownCancellationToken);
+		} catch (OperationCanceledException) {
+			return StopInstanceResult.AgentShuttingDown;
+		}
+
+		try {
+			if (!instances.TryGetValue(instanceGuid, out var instance)) {
+				return StopInstanceResult.InstanceDoesNotExist;
+			}
+			else {
+				return await instance.Stop();
+			}
+		} finally {
+			semaphore.Release();
+		}
 	}
 
-	public Task<InstanceActionResult<SendCommandToInstanceResult>> SendCommand(Guid instanceGuid, string command) {
-		return AcquireSemaphoreAndRunWithInstance(instanceGuid, async instance => await instance.SendCommand(command, shutdownCancellationToken) ? SendCommandToInstanceResult.Success : SendCommandToInstanceResult.UnknownError);
+	public async Task<SendCommandToInstanceResult> SendCommand(Guid instanceGuid, string command) {
+		try {
+			await semaphore.WaitAsync(shutdownCancellationToken);
+		} catch (OperationCanceledException) {
+			return SendCommandToInstanceResult.AgentShuttingDown;
+		}
+
+		try {
+			if (!instances.TryGetValue(instanceGuid, out var instance)) {
+				return SendCommandToInstanceResult.InstanceDoesNotExist;
+			}
+
+			if (!await instance.SendCommand(command, shutdownCancellationToken)) {
+				return SendCommandToInstanceResult.UnknownError;
+			}
+
+			return SendCommandToInstanceResult.Success;
+		} finally {
+			semaphore.Release();
+		}
 	}
 
 	public async Task StopAll() {
 		shutdownCancellationTokenSource.Cancel();
-		
-		Logger.Information("Stopping all instances...");
 
 		await semaphore.WaitAsync(CancellationToken.None);
 		try {
@@ -145,7 +166,6 @@ sealed class InstanceSessionManager : IDisposable {
 	}
 
 	public void Dispose() {
-		minecraftServerExecutables.Dispose();
 		shutdownCancellationTokenSource.Dispose();
 		semaphore.Dispose();
 	}

Agent/Phantom.Agent.Services/Instances/PortManager.cs

@@ -14,28 +14,17 @@ sealed class PortManager {
 	}
 
 	public Result Reserve(InstanceConfiguration configuration) {
-		var serverPort = configuration.ServerPort;
-		var rconPort = configuration.RconPort;
-		
-		if (!allowedServerPorts.Contains(serverPort)) {
-			return Result.ServerPortNotAllowed;
-		}
-
-		if (!allowedRconPorts.Contains(rconPort)) {
-			return Result.RconPortNotAllowed;
-		}
-		
 		lock (usedPorts) {
-			if (usedPorts.Contains(serverPort)) {
+			if (usedPorts.Contains(configuration.ServerPort)) {
 				return Result.ServerPortAlreadyInUse;
 			}
 
-			if (usedPorts.Contains(rconPort)) {
+			if (usedPorts.Contains(configuration.RconPort)) {
 				return Result.RconPortAlreadyInUse;
 			}
 
-			usedPorts.Add(serverPort);
-			usedPorts.Add(rconPort);
+			usedPorts.Add(configuration.ServerPort);
+			usedPorts.Add(configuration.RconPort);
 		}
 
 		return Result.Success;
@@ -53,6 +42,6 @@ sealed class PortManager {
 		ServerPortNotAllowed,
 		ServerPortAlreadyInUse,
 		RconPortNotAllowed,
-		RconPortAlreadyInUse
+		RconPortAlreadyInUse,
 	}
 }

Agent/Phantom.Agent.Services/Instances/States/IInstanceState.cs

@@ -1,11 +1,7 @@
-using Phantom.Common.Data.Minecraft;
-using Phantom.Common.Data.Replies;
-
-namespace Phantom.Agent.Services.Instances.States; 
+namespace Phantom.Agent.Services.Instances.States; 
 
 interface IInstanceState {
-	void Initialize();
-	(IInstanceState, LaunchInstanceResult) Launch(InstanceContext context);
-	(IInstanceState, StopInstanceResult) Stop(MinecraftStopStrategy stopStrategy);
+	IInstanceState Launch(InstanceContext context);
+	IInstanceState Stop();
 	Task<bool> SendCommand(string command, CancellationToken cancellationToken);
 }

Agent/Phantom.Agent.Services/Instances/States/InstanceLaunchingState.cs

@@ -2,8 +2,6 @@
 using Phantom.Agent.Minecraft.Launcher;
 using Phantom.Agent.Minecraft.Server;
 using Phantom.Common.Data.Instance;
-using Phantom.Common.Data.Minecraft;
-using Phantom.Common.Data.Replies;
 
 namespace Phantom.Agent.Services.Instances.States;
 
@@ -14,12 +12,10 @@ sealed class InstanceLaunchingState : IInstanceState, IDisposable {
 
 	public InstanceLaunchingState(InstanceContext context) {
 		this.context = context;
-	}
-
-	public void Initialize() {
-		context.Logger.Information("Session starting...");
-
-		var launchTask = context.LaunchServices.TaskManager.Run("Launch procedure for instance " + context.ShortName, DoLaunch);
+		this.context.Logger.Information("Session starting...");
+		this.context.ReportStatus(InstanceStatus.IsLaunching);
+		
+		var launchTask = Task.Run(DoLaunch);
 		launchTask.ContinueWith(OnLaunchSuccess, CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, TaskScheduler.Default);
 		launchTask.ContinueWith(OnLaunchFailure, CancellationToken.None, TaskContinuationOptions.NotOnRanToCompletion, TaskScheduler.Default);
 	}
@@ -27,38 +23,29 @@ sealed class InstanceLaunchingState : IInstanceState, IDisposable {
 	private async Task<InstanceSession> DoLaunch() {
 		var cancellationToken = cancellationTokenSource.Token;
 		cancellationToken.ThrowIfCancellationRequested();
-
+		
 		void OnDownloadProgress(object? sender, DownloadProgressEventArgs args) {
 			byte progress = (byte) Math.Min(args.DownloadedBytes * 100 / args.TotalBytes, 100);
-
+			
 			if (lastDownloadProgress != progress) {
 				lastDownloadProgress = progress;
-				context.ReportStatus(InstanceStatus.Downloading(progress));
+				context.ReportStatus(new InstanceStatus.Downloading(progress));
 			}
 		}
 
-		var launchResult = await context.Launcher.Launch(context.Logger, context.LaunchServices, OnDownloadProgress, cancellationToken);
-		if (launchResult is LaunchResult.InvalidJavaRuntime) {
-			throw new LaunchFailureException(InstanceLaunchFailReason.JavaRuntimeNotFound, "Session failed to launch, invalid Java runtime.");
-		}
-		else if (launchResult is LaunchResult.InvalidJvmArguments) {
-			throw new LaunchFailureException(InstanceLaunchFailReason.InvalidJvmArguments, "Session failed to launch, invalid JVM arguments.");
-		}
-		else if (launchResult is LaunchResult.CouldNotDownloadMinecraftServer) {
+		var launchResult = await context.Launcher.Launch(context.LaunchServices, OnDownloadProgress, cancellationToken);
+		if (launchResult is LaunchResult.CouldNotDownloadMinecraftServer) {
 			throw new LaunchFailureException(InstanceLaunchFailReason.CouldNotDownloadMinecraftServer, "Session failed to launch, could not download Minecraft server.");
 		}
-		else if (launchResult is LaunchResult.CouldNotConfigureMinecraftServer) {
-			throw new LaunchFailureException(InstanceLaunchFailReason.CouldNotConfigureMinecraftServer, "Session failed to launch, could not configure Minecraft server.");
-		}
-		else if (launchResult is LaunchResult.CouldNotStartMinecraftServer) {
-			throw new LaunchFailureException(InstanceLaunchFailReason.CouldNotStartMinecraftServer, "Session failed to launch, could not start Minecraft server.");
+		else if (launchResult is LaunchResult.InvalidJavaRuntime) {
+			throw new LaunchFailureException(InstanceLaunchFailReason.JavaRuntimeNotFound, "Session failed to launch, invalid Java runtime.");
 		}
 
 		if (launchResult is not LaunchResult.Success launchSuccess) {
 			throw new LaunchFailureException(InstanceLaunchFailReason.UnknownError, "Session failed to launch.");
 		}
 
-		context.ReportStatus(InstanceStatus.Launching);
+		context.ReportStatus(InstanceStatus.IsLaunching);
 		return launchSuccess.Session;
 	}
 
@@ -66,10 +53,11 @@ sealed class InstanceLaunchingState : IInstanceState, IDisposable {
 		context.TransitionState(() => {
 			if (cancellationTokenSource.IsCancellationRequested) {
 				context.PortManager.Release(context.Configuration);
-				return (new InstanceNotRunningState(), InstanceStatus.NotRunning);
+				context.ReportStatus(InstanceStatus.IsNotRunning);
+				return new InstanceNotRunningState();
 			}
 			else {
-				return (new InstanceRunningState(context, task.Result), null);
+				return new InstanceRunningState(context, task.Result);
 			}
 		});
 	}
@@ -77,12 +65,12 @@ sealed class InstanceLaunchingState : IInstanceState, IDisposable {
 	private void OnLaunchFailure(Task task) {
 		if (task.Exception is { InnerException: LaunchFailureException e }) {
 			context.Logger.Error(e.LogMessage);
-			context.ReportStatus(InstanceStatus.Failed(e.Reason));
+			context.ReportStatus(new InstanceStatus.Failed(e.Reason));
 		}
 		else {
-			context.ReportStatus(InstanceStatus.Failed(InstanceLaunchFailReason.UnknownError));
+			context.ReportStatus(new InstanceStatus.Failed(InstanceLaunchFailReason.UnknownError));
 		}
-
+		
 		context.PortManager.Release(context.Configuration);
 		context.TransitionState(new InstanceNotRunningState());
 	}
@@ -90,20 +78,20 @@ sealed class InstanceLaunchingState : IInstanceState, IDisposable {
 	private sealed class LaunchFailureException : Exception {
 		public InstanceLaunchFailReason Reason { get; }
 		public string LogMessage { get; }
-
+		
 		public LaunchFailureException(InstanceLaunchFailReason reason, string logMessage) {
 			this.Reason = reason;
 			this.LogMessage = logMessage;
 		}
 	}
 
-	public (IInstanceState, LaunchInstanceResult) Launch(InstanceContext context) {
-		return (this, LaunchInstanceResult.InstanceAlreadyLaunching);
+	public IInstanceState Launch(InstanceContext context) {
+		return this;
 	}
 
-	public (IInstanceState, StopInstanceResult) Stop(MinecraftStopStrategy stopStrategy) {
+	public IInstanceState Stop() {
 		cancellationTokenSource.Cancel();
-		return (this, StopInstanceResult.StopInitiated);
+		return this;
 	}
 
 	public Task<bool> SendCommand(string command, CancellationToken cancellationToken) {

Agent/Phantom.Agent.Services/Instances/States/InstanceNotRunningState.cs

@@ -1,13 +1,9 @@
 using Phantom.Common.Data.Instance;
-using Phantom.Common.Data.Minecraft;
-using Phantom.Common.Data.Replies;
 
 namespace Phantom.Agent.Services.Instances.States; 
 
 sealed class InstanceNotRunningState : IInstanceState {
-	public void Initialize() {}
-
-	public (IInstanceState, LaunchInstanceResult) Launch(InstanceContext context) {
+	public IInstanceState Launch(InstanceContext context) {
 		InstanceLaunchFailReason? failReason = context.PortManager.Reserve(context.Configuration) switch {
 			PortManager.Result.ServerPortNotAllowed   => InstanceLaunchFailReason.ServerPortNotAllowed,
 			PortManager.Result.ServerPortAlreadyInUse => InstanceLaunchFailReason.ServerPortAlreadyInUse,
@@ -17,16 +13,15 @@ sealed class InstanceNotRunningState : IInstanceState {
 		};
 
 		if (failReason != null) {
-			context.ReportStatus(InstanceStatus.Failed(failReason.Value));
-			return (this, LaunchInstanceResult.LaunchInitiated);
+			context.ReportStatus(new InstanceStatus.Failed(failReason.Value));
+			return this;
 		}
 		
-		context.ReportStatus(InstanceStatus.Launching);
-		return (new InstanceLaunchingState(context), LaunchInstanceResult.LaunchInitiated);
+		return new InstanceLaunchingState(context);
 	}
 
-	public (IInstanceState, StopInstanceResult) Stop(MinecraftStopStrategy stopStrategy) {
-		return (this, StopInstanceResult.InstanceAlreadyStopped);
+	public IInstanceState Stop() {
+		return this;
 	}
 
 	public Task<bool> SendCommand(string command, CancellationToken cancellationToken) {

Agent/Phantom.Agent.Services/Instances/States/InstanceRunningState.cs

@@ -1,127 +1,58 @@
-using Phantom.Agent.Minecraft.Command;
-using Phantom.Agent.Minecraft.Instance;
+using Phantom.Agent.Minecraft.Instance;
 using Phantom.Common.Data.Instance;
-using Phantom.Common.Data.Minecraft;
-using Phantom.Common.Data.Replies;
 
 namespace Phantom.Agent.Services.Instances.States;
 
 sealed class InstanceRunningState : IInstanceState {
 	private readonly InstanceContext context;
 	private readonly InstanceSession session;
-	private readonly InstanceLogSender logSender;
+	private readonly InstanceLogSenderThread logSenderThread;
 	private readonly SessionObjects sessionObjects;
-	
-	private readonly CancellationTokenSource delayedStopCancellationTokenSource = new ();
-	private bool stateOwnsDelayedStopCancellationTokenSource = true;
-	private bool isStopping;
 
 	public InstanceRunningState(InstanceContext context, InstanceSession session) {
 		this.context = context;
 		this.session = session;
-		this.logSender = new InstanceLogSender(context.LaunchServices.TaskManager, context.Configuration.InstanceGuid, context.ShortName);
-		this.sessionObjects = new SessionObjects(this);
-	}
+		this.logSenderThread = new InstanceLogSenderThread(context.Configuration.InstanceGuid, context.ShortName);
+		this.sessionObjects = new SessionObjects(context, session, logSenderThread);
+
+		this.session.AddOutputListener(SessionOutput);
+		this.session.SessionEnded += SessionEnded;
 
-	public void Initialize() {
-		session.AddOutputListener(SessionOutput);
-		session.SessionEnded += SessionEnded;
-		
 		if (session.HasEnded) {
 			if (sessionObjects.Dispose()) {
 				context.Logger.Warning("Session ended immediately after it was started.");
-				context.LaunchServices.TaskManager.Run("Transition state of instance " + context.ShortName + " to not running", () => context.TransitionState(new InstanceNotRunningState(), InstanceStatus.Failed(InstanceLaunchFailReason.UnknownError)));
+				context.ReportStatus(new InstanceStatus.Failed(InstanceLaunchFailReason.UnknownError));
+				Task.Run(() => context.TransitionState(new InstanceNotRunningState()));
 			}
 		}
 		else {
-			context.ReportStatus(InstanceStatus.Running);
+			context.ReportStatus(InstanceStatus.IsRunning);
 			context.Logger.Information("Session started.");
 		}
 	}
 
 	private void SessionOutput(object? sender, string e) {
 		context.Logger.Verbose("[Server] {Line}", e);
-		logSender.Enqueue(e);
+		logSenderThread.Enqueue(e);
 	}
 
 	private void SessionEnded(object? sender, EventArgs e) {
-		if (!sessionObjects.Dispose()) {
-			return;
-		}
-
-		if (isStopping) {
+		if (sessionObjects.Dispose()) {
 			context.Logger.Information("Session ended.");
-			context.TransitionState(new InstanceNotRunningState(), InstanceStatus.NotRunning);
-		}
-		else {
-			context.Logger.Information("Session ended unexpectedly, restarting...");
-			context.TransitionState(new InstanceLaunchingState(context), InstanceStatus.Restarting);
+			context.ReportStatus(InstanceStatus.IsNotRunning);
+			context.TransitionState(new InstanceNotRunningState());
 		}
 	}
 
-	public (IInstanceState, LaunchInstanceResult) Launch(InstanceContext context) {
-		return (this, LaunchInstanceResult.InstanceAlreadyRunning);
+	public IInstanceState Launch(InstanceContext context) {
+		return this;
 	}
 
-	public (IInstanceState, StopInstanceResult) Stop(MinecraftStopStrategy stopStrategy) {
-		if (stopStrategy == MinecraftStopStrategy.Instant) {
-			CancelDelayedStop();
-			return (PrepareStoppedState(), StopInstanceResult.StopInitiated);
-		}
-
-		if (isStopping) {
-			// TODO change delay or something
-			return (this, StopInstanceResult.InstanceAlreadyStopping);
-		}
-		
-		isStopping = true;
-		context.LaunchServices.TaskManager.Run("Delayed stop timer for instance " + context.ShortName, () => StopLater(stopStrategy.Seconds));
-		return (this, StopInstanceResult.StopInitiated);
-	}
-
-	private IInstanceState PrepareStoppedState() {
+	public IInstanceState Stop() {
 		session.SessionEnded -= SessionEnded;
 		return new InstanceStoppingState(context, session, sessionObjects);
 	}
 
-	private void CancelDelayedStop() {
-		try {
-			delayedStopCancellationTokenSource.Cancel();
-		} catch (ObjectDisposedException) {
-			// ignore
-		}
-	}
-
-	private async Task StopLater(int seconds) {
-		var cancellationToken = delayedStopCancellationTokenSource.Token;
-
-		try {
-			stateOwnsDelayedStopCancellationTokenSource = false;
-
-			int[] stops = { 60, 30, 10, 5, 4, 3, 2, 1, 0 };
-			
-			foreach (var stop in stops) {
-				if (seconds > stop) {
-					await SendCommand(MinecraftCommand.Say("Server shutting down in " + seconds + (seconds == 1 ? " second." : " seconds.")), cancellationToken);
-					await Task.Delay(TimeSpan.FromSeconds(seconds - stop), cancellationToken);
-					seconds = stop;
-				}
-			}
-		} catch (OperationCanceledException) {
-			context.Logger.Verbose("Cancelled delayed stop.");
-			return;
-		} catch (ObjectDisposedException) {
-			return;
-		} catch (Exception e) {
-			context.Logger.Warning(e, "Caught exception during delayed stop.");
-			return;
-		} finally {
-			delayedStopCancellationTokenSource.Dispose();
-		}
-
-		context.TransitionState(PrepareStoppedState());
-	}
-
 	public async Task<bool> SendCommand(string command, CancellationToken cancellationToken) {
 		try {
 			context.Logger.Information("Sending command: {Command}", command);
@@ -136,11 +67,15 @@ sealed class InstanceRunningState : IInstanceState {
 	}
 
 	public sealed class SessionObjects {
-		private readonly InstanceRunningState state;
+		private readonly InstanceContext context;
+		private readonly InstanceSession session;
+		private readonly InstanceLogSenderThread logSenderThread;
 		private bool isDisposed;
 
-		public SessionObjects(InstanceRunningState state) {
-			this.state = state;
+		public SessionObjects(InstanceContext context, InstanceSession session, InstanceLogSenderThread logSenderThread) {
+			this.context = context;
+			this.session = session;
+			this.logSenderThread = logSenderThread;
 		}
 
 		public bool Dispose() {
@@ -152,16 +87,9 @@ sealed class InstanceRunningState : IInstanceState {
 				isDisposed = true;
 			}
 
-			if (state.stateOwnsDelayedStopCancellationTokenSource) {
-				state.delayedStopCancellationTokenSource.Dispose();
-			}
-			else {
-				state.CancelDelayedStop();
-			}
-			
-			state.logSender.Cancel();
-			state.session.Dispose();
-			state.context.PortManager.Release(state.context.Configuration);
+			logSenderThread.Cancel();
+			session.Dispose();
+			context.PortManager.Release(context.Configuration);
 			return true;
 		}
 	}

Agent/Phantom.Agent.Services/Instances/States/InstanceStoppingState.cs

@@ -1,9 +1,5 @@
-using System.Diagnostics;
-using Phantom.Agent.Minecraft.Command;
-using Phantom.Agent.Minecraft.Instance;
+using Phantom.Agent.Minecraft.Instance;
 using Phantom.Common.Data.Instance;
-using Phantom.Common.Data.Minecraft;
-using Phantom.Common.Data.Replies;
 
 namespace Phantom.Agent.Services.Instances.States; 
 
@@ -16,12 +12,10 @@ sealed class InstanceStoppingState : IInstanceState, IDisposable {
 		this.sessionObjects = sessionObjects;
 		this.session = session;
 		this.context = context;
-	}
-
-	public void Initialize() {
-		context.Logger.Information("Session stopping.");
-		context.ReportStatus(InstanceStatus.Stopping);
-		context.LaunchServices.TaskManager.Run("Stop procedure for instance " + context.ShortName, DoStop);
+		this.context.Logger.Information("Session stopping.");
+		this.context.ReportStatus(InstanceStatus.IsStopping);
+		
+		Task.Run(DoStop);
 	}
 
 	private async Task DoStop() {
@@ -33,27 +27,26 @@ sealed class InstanceStoppingState : IInstanceState, IDisposable {
 			await DoWaitForSessionToEnd();
 		} finally {
 			context.Logger.Information("Session stopped.");
-			context.TransitionState(new InstanceNotRunningState(), InstanceStatus.NotRunning);
+			context.ReportStatus(InstanceStatus.IsNotRunning);
+			context.TransitionState(new InstanceNotRunningState());
 		}
 	}
 
 	private async Task DoSendStopCommand() {
-		using var timeout = new CancellationTokenSource(TimeSpan.FromSeconds(5));
+		using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
 		try {
-			await session.SendCommand(MinecraftCommand.Stop, timeout.Token);
+			await session.SendCommand("stop", cts.Token);
 		} catch (OperationCanceledException) {
 			// ignore
-		} catch (ObjectDisposedException e) when (e.ObjectName == typeof(Process).FullName && session.HasEnded) {
-			// ignore
 		} catch (Exception e) {
 			context.Logger.Warning(e, "Caught exception while sending stop command.");
 		}
 	}
 
 	private async Task DoWaitForSessionToEnd() {
-		using var timeout = new CancellationTokenSource(TimeSpan.FromSeconds(55));
+		using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(55));
 		try {
-			await session.WaitForExit(timeout.Token);
+			await session.WaitForExit(cts.Token);
 		} catch (OperationCanceledException) {
 			try {
 				context.Logger.Warning("Waiting timed out, killing session...");
@@ -64,12 +57,12 @@ sealed class InstanceStoppingState : IInstanceState, IDisposable {
 		}
 	}
 
-	public (IInstanceState, LaunchInstanceResult) Launch(InstanceContext context) {
-		return (this, LaunchInstanceResult.InstanceIsStopping);
+	public IInstanceState Launch(InstanceContext context) {
+		return this;
 	}
 
-	public (IInstanceState, StopInstanceResult) Stop(MinecraftStopStrategy stopStrategy) {
-		return (this, StopInstanceResult.InstanceAlreadyStopping); // TODO maybe provide a way to kill?
+	public IInstanceState Stop() {
+		return this; // TODO maybe provide a way to kill?
 	}
 
 	public Task<bool> SendCommand(string command, CancellationToken cancellationToken) {

Agent/Phantom.Agent.Services/Rpc/MessageListener.cs

@@ -1,11 +1,10 @@
-using Phantom.Agent.Rpc;
+using NetMQ.Sockets;
+using Phantom.Agent.Rpc;
 using Phantom.Common.Data.Replies;
 using Phantom.Common.Logging;
 using Phantom.Common.Messages;
-using Phantom.Common.Messages.BiDirectional;
 using Phantom.Common.Messages.ToAgent;
 using Phantom.Common.Messages.ToServer;
-using Phantom.Utils.Rpc.Message;
 using Serilog;
 
 namespace Phantom.Agent.Services.Rpc;
@@ -13,34 +12,32 @@ namespace Phantom.Agent.Services.Rpc;
 public sealed class MessageListener : IMessageToAgentListener {
 	private static ILogger Logger { get; } = PhantomLogger.Create<MessageListener>();
 
-	private readonly RpcServerConnection connection;
+	private readonly ClientSocket socket;
 	private readonly AgentServices agent;
 	private readonly CancellationTokenSource shutdownTokenSource;
 
-	public MessageListener(RpcServerConnection connection, AgentServices agent, CancellationTokenSource shutdownTokenSource) {
-		this.connection = connection;
+	public MessageListener(ClientSocket socket, AgentServices agent, CancellationTokenSource shutdownTokenSource) {
+		this.socket = socket;
 		this.agent = agent;
 		this.shutdownTokenSource = shutdownTokenSource;
 	}
 
-	public async Task<NoReply> HandleRegisterAgentSuccess(RegisterAgentSuccessMessage message) {
+	public async Task HandleRegisterAgentSuccessResult(RegisterAgentSuccessMessage message) {
 		Logger.Information("Agent authentication successful.");
 
 		foreach (var instanceInfo in message.InitialInstances) {
-			var result = await agent.InstanceSessionManager.Configure(instanceInfo);
-			if (!result.Is(ConfigureInstanceResult.Success)) {
+			if (await agent.InstanceSessionManager.Configure(instanceInfo) != ConfigureInstanceResult.Success) {
 				Logger.Fatal("Unable to configure instance \"{Name}\" (GUID {Guid}), shutting down.", instanceInfo.InstanceName, instanceInfo.InstanceGuid);
 
 				shutdownTokenSource.Cancel();
-				return NoReply.Instance;
+				return;
 			}
 		}
 
-		await ServerMessaging.Send(new AdvertiseJavaRuntimesMessage(agent.JavaRuntimeRepository.All));
-		return NoReply.Instance;
+		await ServerMessaging.SendMessage(new AdvertiseJavaRuntimesMessage(agent.JavaRuntimeRepository.All));
 	}
 
-	public Task<NoReply> HandleRegisterAgentFailure(RegisterAgentFailureMessage message) {
+	public Task HandleRegisterAgentFailureResult(RegisterAgentFailureMessage message) {
 		string errorMessage = message.FailureKind switch {
 			RegisterAgentFailure.ConnectionAlreadyHasAnAgent => "This connection already has an associated agent.",
 			RegisterAgentFailure.InvalidToken                => "Invalid token.",
@@ -50,27 +47,22 @@ public sealed class MessageListener : IMessageToAgentListener {
 		Logger.Fatal("Agent authentication failed: {Error}", errorMessage);
 		Environment.Exit(1);
 
-		return Task.FromResult(NoReply.Instance);
+		return Task.CompletedTask;
 	}
 	
-	public async Task<InstanceActionResult<ConfigureInstanceResult>> HandleConfigureInstance(ConfigureInstanceMessage message) {
-		return await agent.InstanceSessionManager.Configure(message.Configuration);
+	public async Task HandleConfigureInstance(ConfigureInstanceMessage message) {
+		await socket.SendSimpleReply(message, await agent.InstanceSessionManager.Configure(message.Configuration));
 	}
 
-	public async Task<InstanceActionResult<LaunchInstanceResult>> HandleLaunchInstance(LaunchInstanceMessage message) {
-		return await agent.InstanceSessionManager.Launch(message.InstanceGuid);
+	public async Task HandleLaunchInstance(LaunchInstanceMessage message) {
+		await socket.SendSimpleReply(message, await agent.InstanceSessionManager.Launch(message.InstanceGuid));
 	}
 
-	public async Task<InstanceActionResult<StopInstanceResult>> HandleStopInstance(StopInstanceMessage message) {
-		return await agent.InstanceSessionManager.Stop(message.InstanceGuid, message.StopStrategy);
+	public async Task HandleStopInstance(StopInstanceMessage message) {
+		await socket.SendSimpleReply(message, await agent.InstanceSessionManager.Stop(message.InstanceGuid));
 	}
 
-	public async Task<InstanceActionResult<SendCommandToInstanceResult>> HandleSendCommandToInstance(SendCommandToInstanceMessage message) {
-		return await agent.InstanceSessionManager.SendCommand(message.InstanceGuid, message.Command);
-	}
-
-	public Task<NoReply> HandleReply(ReplyMessage message) {
-		connection.Receive(message);
-		return Task.FromResult(NoReply.Instance);
+	public async Task HandleSendCommandToInstance(SendCommandToInstanceMessage message) {
+		await socket.SendSimpleReply(message, await agent.InstanceSessionManager.SendCommand(message.InstanceGuid, message.Command));
 	}
 }

Agent/Phantom.Agent/AgentKey.cs

@@ -1,60 +0,0 @@
-using NetMQ;
-using Phantom.Common.Data.Agent;
-using Phantom.Common.Logging;
-using Phantom.Utils.Cryptography;
-using Phantom.Utils.IO;
-using Serilog;
-
-namespace Phantom.Agent;
-
-static class AgentKey {
-	private static ILogger Logger { get; } = PhantomLogger.Create(nameof(AgentKey));
-
-	public static Task<(NetMQCertificate, AgentAuthToken)?> Load(string? agentKeyToken, string? agentKeyFilePath) {
-		if (agentKeyFilePath != null) {
-			return LoadFromFile(agentKeyFilePath);
-		}
-		else if (agentKeyToken != null) {
-			return Task.FromResult(LoadFromToken(agentKeyToken));
-		}
-		else {
-			throw new InvalidOperationException();
-		}
-	}
-
-	private static async Task<(NetMQCertificate, AgentAuthToken)?> LoadFromFile(string agentKeyFilePath) {
-		if (!File.Exists(agentKeyFilePath)) {
-			Logger.Fatal("Missing agent key file: {AgentKeyFilePath}", agentKeyFilePath);
-			return null;
-		}
-
-		try {
-			Files.RequireMaximumFileSize(agentKeyFilePath, 64);
-			return LoadFromBytes(await File.ReadAllBytesAsync(agentKeyFilePath));
-		} catch (IOException e) {
-			Logger.Fatal("Error loading agent key from file: {AgentKeyFilePath}", agentKeyFilePath);
-			Logger.Fatal(e.Message);
-			return null;
-		} catch (Exception) {
-			Logger.Fatal("File does not contain a valid agent key: {AgentKeyFilePath}", agentKeyFilePath);
-			return null;
-		}
-	}
-
-	private static (NetMQCertificate, AgentAuthToken)? LoadFromToken(string agentKey) {
-		try {
-			return LoadFromBytes(TokenGenerator.DecodeBytes(agentKey));
-		} catch (Exception) {
-			Logger.Fatal("Invalid agent key: {AgentKey}", agentKey);
-			return null;
-		}
-	}
-
-	private static (NetMQCertificate, AgentAuthToken)? LoadFromBytes(byte[] agentKey) {
-		var (publicKey, agentToken) = AgentKeyData.FromBytes(agentKey);
-		var serverCertificate = NetMQCertificate.FromPublicKey(publicKey);
-		
-		Logger.Information("Loaded agent key.");
-		return (serverCertificate, agentToken);
-	}
-}

Agent/Phantom.Agent/AgentNameGenerator.cs

@@ -0,0 +1,476 @@
+using Phantom.Utils.Cryptography;
+
+namespace Phantom.Agent;
+
+static class AgentNameGenerator {
+	private static readonly string[] Prefixes = {
+		"Abundant",
+		"Ancient",
+		"Broken",
+		"Crushed",
+		"Damaged",
+		"Dark",
+		"Divine",
+		"Enchanted",
+		"Flaming",
+		"Frozen",
+		"Gilded",
+		"Glowing",
+		"Immaculate",
+		"Infested",
+		"Invisible",
+		"Luxurious",
+		"Mossy",
+		"Mysterious",
+		"Opulent",
+		"Perplexing",
+		"Possessed",
+		"Pristine",
+		"Rotting",
+		"Sophisticated",
+		"Spectacular",
+		"Stunning",
+		"Tenacious",
+		"Twisted",
+		"Unique",
+		"Venerable",
+		"Withering"
+	};
+
+	private static readonly string[] Suffixes = {
+		"Acacia Button",
+		"Acacia Door",
+		"Acacia Fence",
+		"Acacia Leaves",
+		"Acacia Log",
+		"Acacia Planks",
+		"Acacia Sapling",
+		"Acacia Sign",
+		"Acacia Slab",
+		"Acacia Stairs",
+		"Acacia Trapdoor",
+		"Acacia Wood",
+		"Activator Rail",
+		"Allium",
+		"Ancient Debris",
+		"Andesite Slab",
+		"Andesite Stairs",
+		"Andesite Wall",
+		"Andesite",
+		"Anvil",
+		"Azalea Leaves",
+		"Azalea",
+		"Azure Bluet",
+		"Bamboo",
+		"Barrel",
+		"Basalt",
+		"Beacon",
+		"Bedrock",
+		"Bee Nest",
+		"Beehive",
+		"Beetroots",
+		"Bell",
+		"Birch Button",
+		"Birch Door",
+		"Birch Fence",
+		"Birch Leaves",
+		"Birch Log",
+		"Birch Planks",
+		"Birch Sapling",
+		"Birch Sign",
+		"Birch Slab",
+		"Birch Stairs",
+		"Birch Trapdoor",
+		"Birch Wood",
+		"Black Candle",
+		"Black Carpet",
+		"Black Concrete",
+		"Black Terracotta",
+		"Black Wool",
+		"Blackstone Slab",
+		"Blackstone Stairs",
+		"Blackstone Wall",
+		"Blackstone",
+		"Blast Furnace",
+		"Blue Candle",
+		"Blue Carpet",
+		"Blue Concrete",
+		"Blue Ice",
+		"Blue Orchid",
+		"Blue Terracotta",
+		"Blue Wool",
+		"Bone Block",
+		"Bookshelf",
+		"Brain Coral",
+		"Brewing Stand",
+		"Brick Slab",
+		"Brick Stairs",
+		"Brick Wall",
+		"Bricks",
+		"Brown Candle",
+		"Brown Carpet",
+		"Brown Concrete",
+		"Brown Mushroom",
+		"Brown Terracotta",
+		"Brown Wool",
+		"Bubble Column",
+		"Bubble Coral",
+		"Cactus",
+		"Cake",
+		"Calcite",
+		"Campfire",
+		"Candle",
+		"Carrots",
+		"Cartography Table",
+		"Carved Pumpkin",
+		"Cauldron",
+		"Cave Vines",
+		"Chain",
+		"Chest",
+		"Chorus Flower",
+		"Chorus Plant",
+		"Clay",
+		"Coal Ore",
+		"Coarse Dirt",
+		"Cobbled Deepslate",
+		"Cobblestone Slab",
+		"Cobblestone Stairs",
+		"Cobblestone Wall",
+		"Cobblestone",
+		"Cobweb",
+		"Cocoa",
+		"Composter",
+		"Conduit",
+		"Copper Ore",
+		"Cornflower",
+		"Crafting Table",
+		"Creeper Head",
+		"Crimson Button",
+		"Crimson Door",
+		"Crimson Fence",
+		"Crimson Fungus",
+		"Crimson Hyphae",
+		"Crimson Nylium",
+		"Crimson Planks",
+		"Crimson Roots",
+		"Crimson Sign",
+		"Crimson Slab",
+		"Crimson Stairs",
+		"Crimson Stem",
+		"Crimson Trapdoor",
+		"Crying Obsidian",
+		"Cyan Candle",
+		"Cyan Carpet",
+		"Cyan Concrete",
+		"Cyan Terracotta",
+		"Cyan Wool",
+		"Dandelion",
+		"Dead Bush",
+		"Deepslate Bricks",
+		"Deepslate Tiles",
+		"Deepslate",
+		"Detector Rail",
+		"Diamond Ore",
+		"Diorite Slab",
+		"Diorite Stairs",
+		"Diorite Wall",
+		"Diorite",
+		"Dirt",
+		"Dispenser",
+		"Dragon Egg",
+		"Dragon Head",
+		"Dripstone Block",
+		"Dropper",
+		"Emerald Ore",
+		"Enchanting Table",
+		"End Gateway",
+		"End Portal",
+		"End Rod",
+		"End Stone",
+		"Ender Chest",
+		"Farmland",
+		"Fern",
+		"Fire Coral",
+		"Fletching Table",
+		"Flower Pot",
+		"Flowering Azalea",
+		"Frosted Ice",
+		"Furnace",
+		"Glass Pane",
+		"Glass",
+		"Glowstone",
+		"Gold Ore",
+		"Granite Slab",
+		"Granite Stairs",
+		"Granite Wall",
+		"Granite",
+		"Grass Block",
+		"Grass",
+		"Gravel",
+		"Gray Candle",
+		"Gray Carpet",
+		"Gray Concrete",
+		"Gray Terracotta",
+		"Gray Wool",
+		"Green Candle",
+		"Green Carpet",
+		"Green Concrete",
+		"Green Terracotta",
+		"Green Wool",
+		"Grindstone",
+		"Hay Bale",
+		"Honey Block",
+		"Hopper",
+		"Horn Coral",
+		"Ice",
+		"Iron Bars",
+		"Iron Door",
+		"Iron Ore",
+		"Iron Trapdoor",
+		"Jack o'Lantern",
+		"Jigsaw Block",
+		"Jukebox",
+		"Jungle Button",
+		"Jungle Door",
+		"Jungle Fence",
+		"Jungle Leaves",
+		"Jungle Log",
+		"Jungle Planks",
+		"Jungle Sapling",
+		"Jungle Sign",
+		"Jungle Slab",
+		"Jungle Stairs",
+		"Jungle Trapdoor",
+		"Jungle Wood",
+		"Kelp Plant",
+		"Kelp",
+		"Ladder",
+		"Lantern",
+		"Large Fern",
+		"Lava",
+		"Lectern",
+		"Lever",
+		"Lightning Rod",
+		"Lilac",
+		"Lily Pad",
+		"Lime Candle",
+		"Lime Carpet",
+		"Lime Concrete",
+		"Lime Terracotta",
+		"Lime Wool",
+		"Lodestone",
+		"Loom",
+		"Magenta Candle",
+		"Magenta Carpet",
+		"Magenta Concrete",
+		"Magenta Terracotta",
+		"Magenta Wool",
+		"Magma Block",
+		"Mangrove Button",
+		"Mangrove Door",
+		"Mangrove Fence",
+		"Mangrove Leaves",
+		"Mangrove Log",
+		"Mangrove Planks",
+		"Mangrove Propagule",
+		"Mangrove Roots",
+		"Mangrove Sign",
+		"Mangrove Slab",
+		"Mangrove Stairs",
+		"Mangrove Trapdoor",
+		"Mangrove Wood",
+		"Melon Stem",
+		"Melon",
+		"Moss Block",
+		"Moss Carpet",
+		"Mossy Cobblestone",
+		"Mud Bricks",
+		"Mud",
+		"Mushroom Stem",
+		"Mycelium",
+		"Nether Bricks",
+		"Nether Portal",
+		"Nether Sprouts",
+		"Nether Wart",
+		"Netherrack",
+		"Note Block",
+		"Oak Button",
+		"Oak Door",
+		"Oak Fence",
+		"Oak Leaves",
+		"Oak Log",
+		"Oak Planks",
+		"Oak Sapling",
+		"Oak Sign",
+		"Oak Slab",
+		"Oak Stairs",
+		"Oak Trapdoor",
+		"Oak Wood",
+		"Observer",
+		"Obsidian",
+		"Ominous Banner",
+		"Orange Candle",
+		"Orange Carpet",
+		"Orange Concrete",
+		"Orange Terracotta",
+		"Orange Tulip",
+		"Orange Wool",
+		"Oxeye Daisy",
+		"Oxidized Copper",
+		"Packed Ice",
+		"Packed Mud",
+		"Peony",
+		"Pink Candle",
+		"Pink Carpet",
+		"Pink Concrete",
+		"Pink Terracotta",
+		"Pink Tulip",
+		"Pink Wool",
+		"Piston",
+		"Podzol",
+		"Pointed Dripstone",
+		"Polished Andesite",
+		"Polished Basalt",
+		"Polished Blackstone",
+		"Polished Deepslate",
+		"Polished Diorite",
+		"Polished Granite",
+		"Poppy",
+		"Potatoes",
+		"Powder Snow",
+		"Powered Rail",
+		"Prismarine Bricks",
+		"Prismarine Slab",
+		"Prismarine Stairs",
+		"Prismarine Wall",
+		"Prismarine",
+		"Pumpkin Stem",
+		"Pumpkin",
+		"Purple Candle",
+		"Purple Carpet",
+		"Purple Concrete",
+		"Purple Terracotta",
+		"Purple Wool",
+		"Purpur Block",
+		"Purpur Pillar",
+		"Purpur Slab",
+		"Purpur Stairs",
+		"Quartz Bricks",
+		"Quartz Pillar",
+		"Quartz Slab",
+		"Quartz Stairs",
+		"Rail",
+		"Red Candle",
+		"Red Carpet",
+		"Red Concrete",
+		"Red Mushroom",
+		"Red Sand",
+		"Red Sandstone",
+		"Red Terracotta",
+		"Red Tulip",
+		"Red Wool",
+		"Redstone Lamp",
+		"Redstone Ore",
+		"Redstone Torch",
+		"Redstone Wire",
+		"Reinforced Deepslate",
+		"Rooted Dirt",
+		"Rose Bush",
+		"Sand",
+		"Sandstone Slab",
+		"Sandstone Stairs",
+		"Sandstone Wall",
+		"Sandstone",
+		"Scaffolding",
+		"Sea Lantern",
+		"Sea Pickle",
+		"Seagrass",
+		"Shroomlight",
+		"Shulker Box",
+		"Skeleton Skull",
+		"Slime Block",
+		"Smithing Table",
+		"Smoker",
+		"Smooth Basalt",
+		"Smooth Sandstone",
+		"Smooth Stone",
+		"Snow Block",
+		"Snow",
+		"Soul Lantern",
+		"Soul Sand",
+		"Soul Torch",
+		"Sponge",
+		"Spore Blossom",
+		"Spruce Button",
+		"Spruce Door",
+		"Spruce Fence",
+		"Spruce Leaves",
+		"Spruce Log",
+		"Spruce Planks",
+		"Spruce Sapling",
+		"Spruce Sign",
+		"Spruce Slab",
+		"Spruce Stairs",
+		"Spruce Trapdoor",
+		"Spruce Wood",
+		"Sticky Piston",
+		"Stone Bricks",
+		"Stone Button",
+		"Stone Slab",
+		"Stone Stairs",
+		"Stone",
+		"Stonecutter",
+		"Sugar Cane",
+		"Sunflower",
+		"TNT",
+		"Target",
+		"Terracotta",
+		"Tinted Glass",
+		"Torch",
+		"Trapped Chest",
+		"Tripwire Hook",
+		"Tripwire",
+		"Tube Coral",
+		"Tuff",
+		"Turtle Egg",
+		"Twisting Vines",
+		"Verdant Froglight",
+		"Vines",
+		"Warped Button",
+		"Warped Door",
+		"Warped Fence",
+		"Warped Fungus",
+		"Warped Hyphae",
+		"Warped Nylium",
+		"Warped Planks",
+		"Warped Roots",
+		"Warped Sign",
+		"Warped Slab",
+		"Warped Stairs",
+		"Warped Stem",
+		"Warped Trapdoor",
+		"Water",
+		"Weeping Vines",
+		"Wheat Crops",
+		"White Candle",
+		"White Carpet",
+		"White Concrete",
+		"White Terracotta",
+		"White Tulip",
+		"White Wool",
+		"Wither Rose",
+		"Yellow Candle",
+		"Yellow Carpet",
+		"Yellow Concrete",
+		"Yellow Terracotta",
+		"Yellow Wool",
+		"Zombie Head"
+	};
+
+	public static string GenerateFrom(Guid guid) {
+		var rand = new Random(StableHashCode.ForString(guid.ToString()));
+		string prefix = Prefixes[rand.Next(Prefixes.Length)];
+		string suffix = Suffixes[rand.Next(Suffixes.Length)];
+		return string.Concat(prefix, " ", suffix);
+	}
+}

Agent/Phantom.Agent/CertificateFile.cs

@@ -0,0 +1,32 @@
+using NetMQ;
+using Phantom.Common.Logging;
+using Phantom.Utils.IO;
+using Serilog;
+
+namespace Phantom.Agent;
+
+static class CertificateFile {
+	private static ILogger Logger { get; } = PhantomLogger.Create(typeof(CertificateFile));
+
+	public static async Task<NetMQCertificate?> LoadPublicKey(string publicKeyFilePath) {
+		if (!File.Exists(publicKeyFilePath)) {
+			Logger.Fatal("Cannot load server certificate, missing key file: {PublicKeyFilePath}", publicKeyFilePath);
+			return null;
+		}
+
+		try {
+			var publicKey = await LoadPublicKeyFromFile(publicKeyFilePath);
+			Logger.Information("Loaded server certificate.");
+			return publicKey;
+		} catch (Exception e) {
+			Logger.Fatal(e, "Error loading server certificate from key file: {PublicKeyFilePath}", publicKeyFilePath);
+			return null;
+		}
+	}
+
+	private static async Task<NetMQCertificate> LoadPublicKeyFromFile(string filePath) {
+		Files.RequireMaximumFileSize(filePath, 1024);
+		byte[] publicKey = await File.ReadAllBytesAsync(filePath);
+		return NetMQCertificate.FromPublicKey(publicKey);
+	}
+}

Agent/Phantom.Agent/GuidFile.cs

@@ -6,7 +6,7 @@ using Serilog;
 namespace Phantom.Agent; 
 
 static class GuidFile {
-	private static ILogger Logger { get; } = PhantomLogger.Create(nameof(GuidFile));
+	private static ILogger Logger { get; } = PhantomLogger.Create(typeof(GuidFile));
 
 	private const string GuidFileName = "agent.guid";
 	

Agent/Phantom.Agent/Phantom.Agent.csproj

@@ -8,7 +8,6 @@
   
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
   </PropertyGroup>
   
   <ItemGroup>

Agent/Phantom.Agent/Program.cs

@@ -1,5 +1,4 @@
-using System.Reflection;
-using Phantom.Agent;
+using Phantom.Agent;
 using Phantom.Agent.Rpc;
 using Phantom.Agent.Services;
 using Phantom.Agent.Services.Rpc;
@@ -8,25 +7,31 @@ using Phantom.Common.Logging;
 using Phantom.Utils.Rpc;
 using Phantom.Utils.Runtime;
 
-const int ProtocolVersion = 1;
+const int AgentVersion = 1;
 
-var shutdownCancellationTokenSource = new CancellationTokenSource();
-var shutdownCancellationToken = shutdownCancellationTokenSource.Token;
+var cancellationTokenSource = new CancellationTokenSource();
 
-PosixSignals.RegisterCancellation(shutdownCancellationTokenSource, static () => {
+PosixSignals.RegisterCancellation(cancellationTokenSource, static () => {
 	PhantomLogger.Root.InformationHeading("Stopping Phantom Panel agent...");
 });
 
 try {
-	var fullVersion = AssemblyAttributes.GetFullVersion(Assembly.GetExecutingAssembly());
-
 	PhantomLogger.Root.InformationHeading("Initializing Phantom Panel agent...");
-	PhantomLogger.Root.Information("Agent version: {Version}", fullVersion);
 
-	var (serverHost, serverPort, javaSearchPath, agentKeyToken, agentKeyFilePath, agentName, maxInstances, maxMemory, allowedServerPorts, allowedRconPorts) = Variables.LoadOrExit();
+	var (serverHost, serverPort, javaSearchPath, authToken, authTokenFilePath, agentNameOrEmpty, maxInstances, maxMemory, allowedServerPorts, allowedRconPorts) = Variables.LoadOrExit();
+	
+	AgentAuthToken agentAuthToken;
+	try {
+		agentAuthToken = authTokenFilePath == null ? new AgentAuthToken(authToken) : await AgentAuthToken.ReadFromFile(authTokenFilePath);
+	} catch (Exception e) {
+		PhantomLogger.Root.Fatal(e, "Error reading auth token.");
+		Environment.Exit(1);
+		return;
+	}
 
-	var agentKey = await AgentKey.Load(agentKeyToken, agentKeyFilePath);
-	if (agentKey == null) {
+	string serverPublicKeyPath = Path.GetFullPath("./secrets/agent.key");
+	var serverCertificate = await CertificateFile.LoadPublicKey(serverPublicKeyPath);
+	if (serverCertificate == null) {
 		Environment.Exit(1);
 	}
 
@@ -38,40 +43,22 @@ try {
 	var agentGuid = await GuidFile.CreateOrLoad(folders.DataFolderPath);
 	if (agentGuid == null) {
 		Environment.Exit(1);
+		return;
 	}
 
-	var (serverCertificate, agentToken) = agentKey.Value;
-	var agentInfo = new AgentInfo(agentGuid.Value, agentName, ProtocolVersion, fullVersion, maxInstances, maxMemory, allowedServerPorts, allowedRconPorts);
+	var agentName = string.IsNullOrEmpty(agentNameOrEmpty) ? AgentNameGenerator.GenerateFrom(agentGuid.Value) : agentNameOrEmpty;
+	var agentInfo = new AgentInfo(agentGuid.Value, agentName, AgentVersion, maxInstances, maxMemory, allowedServerPorts, allowedRconPorts);
 	var agentServices = new AgentServices(agentInfo, folders);
 
-	MessageListener MessageListenerFactory(RpcServerConnection connection) {
-		return new MessageListener(connection, agentServices, shutdownCancellationTokenSource);
-	}
-
 	PhantomLogger.Root.InformationHeading("Launching Phantom Panel agent...");
-
+	
 	await agentServices.Initialize();
-
-	var rpcDisconnectSemaphore = new SemaphoreSlim(0, 1);
-	var rpcConfiguration = new RpcConfiguration(PhantomLogger.Create("Rpc"), PhantomLogger.Create<TaskManager>("Rpc"), serverHost, serverPort, serverCertificate);
-	var rpcTask = RpcLauncher.Launch(rpcConfiguration, agentToken, agentInfo, MessageListenerFactory, rpcDisconnectSemaphore, shutdownCancellationToken);
-	try {
-		await rpcTask.WaitAsync(shutdownCancellationToken);
-	} finally {
-		shutdownCancellationTokenSource.Cancel();
-		await agentServices.Shutdown();
-
-		rpcDisconnectSemaphore.Release();
-		await rpcTask;
-		rpcDisconnectSemaphore.Dispose();
-	}
+	await RpcLauncher.Launch(new RpcConfiguration(PhantomLogger.Create("Rpc"), serverHost, serverPort, serverCertificate, cancellationTokenSource.Token), agentAuthToken, agentInfo, socket => new MessageListener(socket, agentServices, cancellationTokenSource));
+	await agentServices.Shutdown();
 } catch (OperationCanceledException) {
 	// Ignore.
-} catch (Exception e) {
-	PhantomLogger.Root.Fatal(e, "Caught exception in entry point.");
 } finally {
-	shutdownCancellationTokenSource.Dispose();
-
+	cancellationTokenSource.Dispose();
 	PhantomLogger.Root.Information("Bye!");
 	PhantomLogger.Dispose();
 }

Agent/Phantom.Agent/Variables.cs

@@ -9,29 +9,29 @@ sealed record Variables(
 	string ServerHost,
 	ushort ServerPort,
 	string JavaSearchPath,
-	string? AgentKeyToken,
-	string? AgentKeyFilePath,
-	string AgentName,
+	string? AuthToken,
+	string? AuthTokenFilePath,
+	string AgentNameOrEmpty,
 	ushort MaxInstances,
 	RamAllocationUnits MaxMemory,
 	AllowedPorts AllowedServerPorts,
 	AllowedPorts AllowedRconPorts
 ) {
 	private static Variables LoadOrThrow() {
-		var (agentKeyToken, agentKeyFilePath) = EnvironmentVariables.GetEitherString("AGENT_KEY", "AGENT_KEY_FILE").Require;
-		var javaSearchPath = EnvironmentVariables.GetString("JAVA_SEARCH_PATH").WithDefaultGetter(GetDefaultJavaSearchPath);
+		var (authToken, authTokenFilePath) = EnvironmentVariables.GetEitherString("SERVER_AUTH_TOKEN", "SERVER_AUTH_TOKEN_FILE").OrThrow;
+		var javaSearchPath = EnvironmentVariables.GetString("JAVA_SEARCH_PATH").OrGetDefault(GetDefaultJavaSearchPath);
 
 		return new Variables(
-			EnvironmentVariables.GetString("SERVER_HOST").Require,
-			EnvironmentVariables.GetPortNumber("SERVER_PORT").WithDefault(9401),
+			EnvironmentVariables.GetString("SERVER_HOST").OrThrow,
+			EnvironmentVariables.GetPortNumber("SERVER_PORT").OrDefault(9401),
 			javaSearchPath,
-			agentKeyToken,
-			agentKeyFilePath,
-			EnvironmentVariables.GetString("AGENT_NAME").Require,
-			(ushort) EnvironmentVariables.GetInteger("MAX_INSTANCES", min: 1, max: 10000).Require,
-			EnvironmentVariables.GetString("MAX_MEMORY").MapParse(RamAllocationUnits.FromString).Require,
-			EnvironmentVariables.GetString("ALLOWED_SERVER_PORTS").MapParse(AllowedPorts.FromString).Require,
-			EnvironmentVariables.GetString("ALLOWED_RCON_PORTS").MapParse(AllowedPorts.FromString).Require
+			authToken,
+			authTokenFilePath,
+			EnvironmentVariables.GetString("AGENT_NAME").OrDefault(string.Empty),
+			(ushort) EnvironmentVariables.GetInteger("MAX_INSTANCES", min: 1, max: 10000).OrThrow,
+			EnvironmentVariables.GetString("MAX_MEMORY").MapParse(RamAllocationUnits.FromString).OrThrow,
+			EnvironmentVariables.GetString("ALLOWED_SERVER_PORTS").MapParse(AllowedPorts.FromString).OrThrow,
+			EnvironmentVariables.GetString("ALLOWED_RCON_PORTS").MapParse(AllowedPorts.FromString).OrThrow
 		);
 	}
 

Common/Phantom.Common.Data.Tests/Phantom.Common.Data.Tests.csproj

@@ -11,11 +11,11 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" />
-    <PackageReference Include="NUnit" />
-    <PackageReference Include="NUnit3TestAdapter" />
-    <PackageReference Include="NUnit.Analyzers" />
-    <PackageReference Include="coverlet.collector" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
+    <PackageReference Include="NUnit.Analyzers" Version="3.3.0" />
+    <PackageReference Include="coverlet.collector" Version="3.1.2" />
   </ItemGroup>
   
   <ItemGroup>

Common/Phantom.Common.Data/Agent/AgentAuthToken.cs

@@ -1,39 +1,56 @@
 using System.Diagnostics.CodeAnalysis;
 using System.Security.Cryptography;
-using MemoryPack;
+using System.Text;
+using MessagePack;
+using Phantom.Utils.Cryptography;
+using Phantom.Utils.IO;
 
 namespace Phantom.Common.Data.Agent;
 
-[MemoryPackable]
+[MessagePackObject]
 [SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
-public sealed partial class AgentAuthToken {
-	internal const int Length = 12;
+public sealed class AgentAuthToken {
+	private const int MinimumTokenLength = 30;
+	private const int MaximumTokenLength = 100;
 
-	[MemoryPackOrder(0)]
-	[MemoryPackInclude]
+	[Key(0)]
+	public string Value { get; }
+
+	[IgnoreMember]
 	private readonly byte[] bytes;
 
-	internal AgentAuthToken(byte[]? bytes) {
-		if (bytes == null) {
-			throw new ArgumentNullException(nameof(bytes));
+	public AgentAuthToken(string? value) {
+		if (value == null) {
+			throw new ArgumentNullException(nameof(value));
 		}
 
-		if (bytes.Length != Length) {
-			throw new ArgumentOutOfRangeException(nameof(bytes), "Invalid token length: " + bytes.Length + ". Token length must be exactly " + Length + " bytes.");
+		if (value.Length is < MinimumTokenLength or > MaximumTokenLength) {
+			throw new ArgumentOutOfRangeException(nameof(value), "Invalid token length: " + value.Length + ". Token length must be between " + MinimumTokenLength + " and " + MaximumTokenLength + ".");
 		}
 
-		this.bytes = bytes;
+		this.Value = value;
+		this.bytes = TokenGenerator.GetBytesOrThrow(value);
 	}
 
 	public bool FixedTimeEquals(AgentAuthToken providedAuthToken) {
 		return CryptographicOperations.FixedTimeEquals(bytes, providedAuthToken.bytes);
 	}
 
-	internal void WriteTo(Span<byte> span) {
-		bytes.CopyTo(span);
+	public override string ToString() {
+		return Value;
+	}
+
+	public async Task WriteToFile(string filePath) {
+		await Files.WriteBytesAsync(filePath, bytes, FileMode.Create, Chmod.URW_GR);
+	}
+
+	public static async Task<AgentAuthToken> ReadFromFile(string filePath) {
+		Files.RequireMaximumFileSize(filePath, MaximumTokenLength + 1);
+		string contents = await File.ReadAllTextAsync(filePath, Encoding.ASCII);
+		return new AgentAuthToken(contents.Trim());
 	}
 
 	public static AgentAuthToken Generate() {
-		return new AgentAuthToken(RandomNumberGenerator.GetBytes(Length));
+		return new AgentAuthToken(TokenGenerator.Create(MinimumTokenLength));
 	}
 }

Common/Phantom.Common.Data/Agent/AgentInfo.cs

@@ -1,15 +1,14 @@
-using MemoryPack;
+using MessagePack;
 
 namespace Phantom.Common.Data.Agent;
 
-[MemoryPackable]
-public sealed partial record AgentInfo(
-	[property: MemoryPackOrder(0)] Guid Guid,
-	[property: MemoryPackOrder(1)] string Name,
-	[property: MemoryPackOrder(2)] ushort ProtocolVersion,
-	[property: MemoryPackOrder(3)] string BuildVersion,
-	[property: MemoryPackOrder(4)] ushort MaxInstances,
-	[property: MemoryPackOrder(5)] RamAllocationUnits MaxMemory,
-	[property: MemoryPackOrder(6)] AllowedPorts AllowedServerPorts,
-	[property: MemoryPackOrder(7)] AllowedPorts AllowedRconPorts
+[MessagePackObject]
+public sealed record AgentInfo(
+	[property: Key(0)] Guid Guid,
+	[property: Key(1)] string Name,
+	[property: Key(2)] ushort Version,
+	[property: Key(3)] ushort MaxInstances,
+	[property: Key(4)] RamAllocationUnits MaxMemory,
+	[property: Key(5)] AllowedPorts AllowedServerPorts,
+	[property: Key(6)] AllowedPorts AllowedRconPorts
 );

Common/Phantom.Common.Data/Agent/AgentKeyData.cs

@@ -1,18 +0,0 @@
-namespace Phantom.Common.Data.Agent;
-
-public static class AgentKeyData {
-	private const byte TokenLength = AgentAuthToken.Length;
-
-	public static byte[] ToBytes(byte[] publicKey, AgentAuthToken agentToken) {
-		Span<byte> agentKey = stackalloc byte[TokenLength + publicKey.Length];
-		agentToken.WriteTo(agentKey[..TokenLength]);
-		publicKey.CopyTo(agentKey[TokenLength..]);
-		return agentKey.ToArray();
-	}
-
-	public static (byte[] PublicKey, AgentAuthToken AgentToken) FromBytes(byte[] agentKey) {
-		var token = new AgentAuthToken(agentKey[..TokenLength]);
-		var publicKey = agentKey[TokenLength..];
-		return (publicKey, token);
-	}
-}

Common/Phantom.Common.Data/AllowedPorts.cs

@@ -1,28 +1,29 @@
 using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
 using System.Text;
-using MemoryPack;
+using MessagePack;
 
 namespace Phantom.Common.Data;
 
-[MemoryPackable]
-public sealed partial class AllowedPorts {
-	[MemoryPackOrder(0)]
-	[MemoryPackInclude]
-	private	readonly ImmutableArray<PortRange> allDefinitions;
+[MessagePackObject]
+[SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
+public sealed class AllowedPorts {
+	[Key(0)]
+	public ImmutableArray<PortRange> AllDefinitions { get; }
 
-	private AllowedPorts(ImmutableArray<PortRange> allDefinitions) {
+	public AllowedPorts(ImmutableArray<PortRange> allDefinitions) {
 		// TODO normalize and deduplicate ranges
-		this.allDefinitions = allDefinitions.Sort(static (def1, def2) => def1.FirstPort - def2.FirstPort);
+		this.AllDefinitions = allDefinitions.Sort(static (def1, def2) => def1.FirstPort - def2.FirstPort);
 	}
 
 	public bool Contains(ushort port) {
-		return allDefinitions.Any(definition => definition.Contains(port));
+		return AllDefinitions.Any(definition => definition.Contains(port));
 	}
 
 	public override string ToString() {
 		var builder = new StringBuilder();
 
-		foreach (var definition in allDefinitions) {
+		foreach (var definition in AllDefinitions) {
 			definition.ToString(builder);
 			builder.Append(',');
 		}
@@ -34,7 +35,53 @@ public sealed partial class AllowedPorts {
 		return builder.ToString();
 	}
 
-	private static AllowedPorts FromString(ReadOnlySpan<char> definitions) {
+	[MessagePackObject]
+	public readonly record struct PortRange(
+		[property: Key(0)] ushort FirstPort,
+		[property: Key(1)] ushort LastPort
+	) {
+		private PortRange(ushort port) : this(port, port) {}
+
+		internal bool Contains(ushort port) {
+			return port >= FirstPort && port <= LastPort;
+		}
+
+		internal void ToString(StringBuilder builder) {
+			builder.Append(FirstPort);
+
+			if (LastPort != FirstPort) {
+				builder.Append('-');
+				builder.Append(LastPort);
+			}
+		}
+
+		internal static PortRange Parse(ReadOnlySpan<char> definition) {
+			int separatorIndex = definition.IndexOf('-');
+			if (separatorIndex == -1) {
+				var port = ParsePort(definition.Trim());
+				return new PortRange(port);
+			}
+
+			var firstPort = ParsePort(definition[..separatorIndex].Trim());
+			var lastPort = ParsePort(definition[(separatorIndex + 1)..].Trim());
+			if (lastPort < firstPort) {
+				throw new FormatException("Invalid port range '" + firstPort + "-" + lastPort + "'.");
+			}
+			else {
+				return new PortRange(firstPort, lastPort);
+			}
+		}
+
+		private static ushort ParsePort(ReadOnlySpan<char> port) {
+			try {
+				return ushort.Parse(port);
+			} catch (Exception) {
+				throw new FormatException("Invalid port '" + port.ToString() + "'.");
+			}
+		}
+	}
+
+	public static AllowedPorts FromString(ReadOnlySpan<char> definitions) {
 		List<PortRange> parsedDefinitions = new ();
 
 		while (!definitions.IsEmpty) {

Common/Phantom.Common.Data/Instance/IInstanceStatus.cs

@@ -1,67 +0,0 @@
-using MemoryPack;
-
-namespace Phantom.Common.Data.Instance;
-
-[MemoryPackable]
-[MemoryPackUnion(0, typeof(InstanceIsOffline))]
-[MemoryPackUnion(1, typeof(InstanceIsInvalid))]
-[MemoryPackUnion(2, typeof(InstanceIsNotRunning))]
-[MemoryPackUnion(3, typeof(InstanceIsDownloading))]
-[MemoryPackUnion(4, typeof(InstanceIsLaunching))]
-[MemoryPackUnion(5, typeof(InstanceIsRunning))]
-[MemoryPackUnion(6, typeof(InstanceIsRestarting))]
-[MemoryPackUnion(7, typeof(InstanceIsStopping))]
-[MemoryPackUnion(8, typeof(InstanceIsFailed))]
-public partial interface IInstanceStatus {}
-
-[MemoryPackable]
-public sealed partial record InstanceIsOffline : IInstanceStatus;
-
-[MemoryPackable]
-public sealed partial record InstanceIsInvalid([property: MemoryPackOrder(0)] string Reason) : IInstanceStatus;
-
-[MemoryPackable]
-public sealed partial record InstanceIsNotRunning : IInstanceStatus;
-
-[MemoryPackable]
-public sealed partial record InstanceIsDownloading([property: MemoryPackOrder(0)] byte Progress) : IInstanceStatus;
-
-[MemoryPackable]
-public sealed partial record InstanceIsLaunching : IInstanceStatus;
-
-[MemoryPackable]
-public sealed partial record InstanceIsRunning : IInstanceStatus;
-
-[MemoryPackable]
-public sealed partial record InstanceIsRestarting : IInstanceStatus;
-
-[MemoryPackable]
-public sealed partial record InstanceIsStopping : IInstanceStatus;
-
-[MemoryPackable]
-public sealed partial record InstanceIsFailed([property: MemoryPackOrder(0)] InstanceLaunchFailReason Reason) : IInstanceStatus;
-
-public static class InstanceStatus {
-	public static readonly IInstanceStatus Offline = new InstanceIsOffline();
-	public static readonly IInstanceStatus NotRunning = new InstanceIsNotRunning();
-	public static readonly IInstanceStatus Launching = new InstanceIsLaunching();
-	public static readonly IInstanceStatus Running = new InstanceIsRunning();
-	public static readonly IInstanceStatus Restarting = new InstanceIsRestarting();
-	public static readonly IInstanceStatus Stopping = new InstanceIsStopping();
-	
-	public static IInstanceStatus Invalid(string reason) => new InstanceIsInvalid(reason);
-	public static IInstanceStatus Downloading(byte progress) => new InstanceIsDownloading(progress);
-	public static IInstanceStatus Failed(InstanceLaunchFailReason reason) => new InstanceIsFailed(reason);
-	
-	public static bool CanLaunch(this IInstanceStatus status) {
-		return status is InstanceIsNotRunning or InstanceIsFailed;
-	}
-
-	public static bool CanStop(this IInstanceStatus status) {
-		return status is InstanceIsDownloading or InstanceIsLaunching or InstanceIsRunning;
-	}
-
-	public static bool CanSendCommand(this IInstanceStatus status) {
-		return status is InstanceIsRunning;
-	}
-}

Common/Phantom.Common.Data/Instance/InstanceConfiguration.cs

@@ -1,20 +1,18 @@
-using System.Collections.Immutable;
-using MemoryPack;
+using MessagePack;
 using Phantom.Common.Data.Minecraft;
 
-namespace Phantom.Common.Data.Instance;
+namespace Phantom.Common.Data.Instance; 
 
-[MemoryPackable]
-public sealed partial record InstanceConfiguration(
-	[property: MemoryPackOrder(0)] Guid AgentGuid,
-	[property: MemoryPackOrder(1)] Guid InstanceGuid,
-	[property: MemoryPackOrder(2)] string InstanceName,
-	[property: MemoryPackOrder(3)] ushort ServerPort,
-	[property: MemoryPackOrder(4)] ushort RconPort,
-	[property: MemoryPackOrder(5)] string MinecraftVersion,
-	[property: MemoryPackOrder(6)] MinecraftServerKind MinecraftServerKind,
-	[property: MemoryPackOrder(7)] RamAllocationUnits MemoryAllocation,
-	[property: MemoryPackOrder(8)] Guid JavaRuntimeGuid,
-	[property: MemoryPackOrder(9)] ImmutableArray<string> JvmArguments,
-	[property: MemoryPackOrder(10)] bool LaunchAutomatically
+[MessagePackObject]
+public sealed record InstanceConfiguration(
+	[property: Key(0)] Guid AgentGuid,
+	[property: Key(1)] Guid InstanceGuid,
+	[property: Key(2)] string InstanceName,
+	[property: Key(3)] ushort ServerPort,
+	[property: Key(4)] ushort RconPort,
+	[property: Key(5)] string MinecraftVersion,
+	[property: Key(6)] MinecraftServerKind MinecraftServerKind,
+	[property: Key(7)] RamAllocationUnits MemoryAllocation,
+	[property: Key(8)] Guid JavaRuntimeGuid,
+	[property: Key(9)] bool LaunchAutomatically
 );

Common/Phantom.Common.Data/Instance/InstanceLaunchFailReason.cs

@@ -1,31 +1,25 @@
 namespace Phantom.Common.Data.Instance;
 
 public enum InstanceLaunchFailReason {
-	UnknownError,
 	ServerPortNotAllowed,
 	ServerPortAlreadyInUse,
 	RconPortNotAllowed,
 	RconPortAlreadyInUse,
 	JavaRuntimeNotFound,
-	InvalidJvmArguments,
 	CouldNotDownloadMinecraftServer,
-	CouldNotConfigureMinecraftServer,
-	CouldNotStartMinecraftServer
+	UnknownError
 }
 
 public static class InstanceLaunchFailReasonExtensions {
 	public static string ToSentence(this InstanceLaunchFailReason reason) {
 		return reason switch {
-			InstanceLaunchFailReason.ServerPortNotAllowed             => "Server port not allowed.",
-			InstanceLaunchFailReason.ServerPortAlreadyInUse           => "Server port already in use.",
-			InstanceLaunchFailReason.RconPortNotAllowed               => "Rcon port not allowed.",
-			InstanceLaunchFailReason.RconPortAlreadyInUse             => "Rcon port already in use.",
-			InstanceLaunchFailReason.JavaRuntimeNotFound              => "Java runtime not found.",
-			InstanceLaunchFailReason.InvalidJvmArguments              => "Invalid JVM arguments.",
-			InstanceLaunchFailReason.CouldNotDownloadMinecraftServer  => "Could not download Minecraft server.",
-			InstanceLaunchFailReason.CouldNotConfigureMinecraftServer => "Could not configure Minecraft server.",
-			InstanceLaunchFailReason.CouldNotStartMinecraftServer     => "Could not start Minecraft server.",
-			_                                                         => "Unknown error."
+			InstanceLaunchFailReason.ServerPortNotAllowed            => "Server port not allowed.",
+			InstanceLaunchFailReason.ServerPortAlreadyInUse          => "Server port already in use.",
+			InstanceLaunchFailReason.RconPortNotAllowed              => "Rcon port not allowed.",
+			InstanceLaunchFailReason.RconPortAlreadyInUse            => "Rcon port already in use.",
+			InstanceLaunchFailReason.JavaRuntimeNotFound             => "Java runtime not found.",
+			InstanceLaunchFailReason.CouldNotDownloadMinecraftServer => "Could not download Minecraft server.",
+			_                                                        => "Unknown error."
 		};
 	}
 }

Common/Phantom.Common.Data/Instance/InstanceStatus.cs

@@ -0,0 +1,63 @@
+using MessagePack;
+
+namespace Phantom.Common.Data.Instance;
+
+[Union(0, typeof(Offline))]
+[Union(1, typeof(Invalid))]
+[Union(2, typeof(NotRunning))]
+[Union(3, typeof(Downloading))]
+[Union(4, typeof(Launching))]
+[Union(5, typeof(Running))]
+[Union(6, typeof(Stopping))]
+[Union(7, typeof(Failed))]
+public abstract record InstanceStatus {
+	public static readonly InstanceStatus IsOffline = new Offline();
+	public static readonly InstanceStatus IsNotRunning = new NotRunning();
+	public static readonly InstanceStatus IsLaunching = new Launching();
+	public static readonly InstanceStatus IsRunning = new Running();
+	public static readonly InstanceStatus IsStopping = new Stopping();
+
+	[MessagePackObject]
+	public sealed record Offline : InstanceStatus;
+
+	[MessagePackObject]
+	public sealed record Invalid(
+		[property: Key(0)] string Reason
+	) : InstanceStatus;
+
+	[MessagePackObject]
+	public sealed record NotRunning : InstanceStatus;
+
+	[MessagePackObject]
+	public sealed record Downloading(
+		[property: Key(0)] byte Progress
+	) : InstanceStatus;
+
+	[MessagePackObject]
+	public sealed record Launching : InstanceStatus;
+	
+	[MessagePackObject]
+	public sealed record Running : InstanceStatus;
+
+	[MessagePackObject]
+	public sealed record Stopping : InstanceStatus;
+
+	[MessagePackObject]
+	public sealed record Failed(
+		[property: Key(0)] InstanceLaunchFailReason Reason
+	) : InstanceStatus;
+}
+
+public static class InstanceStatusExtensions {
+	public static bool CanLaunch(this InstanceStatus status) {
+		return status is InstanceStatus.NotRunning or InstanceStatus.Failed;
+	}
+
+	public static bool CanStop(this InstanceStatus status) {
+		return status is InstanceStatus.Downloading or InstanceStatus.Launching or InstanceStatus.Running;
+	}
+
+	public static bool CanSendCommand(this InstanceStatus status) {
+		return status is InstanceStatus.Running;
+	}
+}

Common/Phantom.Common.Data/Java/JavaRuntime.cs

@@ -1,13 +1,13 @@
 using System.Diagnostics.CodeAnalysis;
-using MemoryPack;
+using MessagePack;
 
 namespace Phantom.Common.Data.Java;
 
-[MemoryPackable]
-public sealed partial record JavaRuntime(
-	[property: MemoryPackOrder(0)] string MainVersion,
-	[property: MemoryPackOrder(1)] string FullVersion,
-	[property: MemoryPackOrder(2)] string DisplayName
+[MessagePackObject]
+public sealed record JavaRuntime(
+	[property: Key(0)] string MainVersion,
+	[property: Key(1)] string FullVersion,
+	[property: Key(2)] string DisplayName
 ) : IComparable<JavaRuntime> {
 	public int CompareTo(JavaRuntime? other) {
 		if (ReferenceEquals(this, other)) {

Common/Phantom.Common.Data/Java/TaggedJavaRuntime.cs

@@ -1,9 +1,9 @@
-using MemoryPack;
+using MessagePack;
 
 namespace Phantom.Common.Data.Java; 
 
-[MemoryPackable]
-public sealed partial record TaggedJavaRuntime(
-	[property: MemoryPackOrder(0)] Guid Guid,
-	[property: MemoryPackOrder(1)] JavaRuntime Runtime
+[MessagePackObject]
+public sealed record TaggedJavaRuntime(
+	[property: Key(0)] Guid Guid,
+	[property: Key(1)] JavaRuntime Runtime
 );

Common/Phantom.Common.Data/Minecraft/MinecraftStopStrategy.cs

@@ -1,10 +0,0 @@
-using MemoryPack;
-
-namespace Phantom.Common.Data.Minecraft;
-
-[MemoryPackable]
-public readonly partial record struct MinecraftStopStrategy(
-	[property: MemoryPackOrder(0)] ushort Seconds
-) {
-	public static MinecraftStopStrategy Instant => new (0);
-}

Common/Phantom.Common.Data/Minecraft/MinecraftVersion.cs

@@ -1,7 +0,0 @@
-namespace Phantom.Common.Data.Minecraft; 
-
-public sealed record MinecraftVersion(
-	string Id,
-	MinecraftVersionType Type,
-	string MetadataUrl
-);

Common/Phantom.Common.Data/Minecraft/MinecraftVersionType.cs

@@ -1,38 +0,0 @@
-using System.Collections.Immutable;
-
-namespace Phantom.Common.Data.Minecraft;
-
-public enum MinecraftVersionType : ushort {
-	Other = 0,
-	Release = 1,
-	Snapshot = 2,
-	OldBeta = 3,
-	OldAlpha = 4
-}
-
-public static class MinecraftVersionTypes {
-	public static readonly ImmutableArray<MinecraftVersionType> WithServerJars = ImmutableArray.Create(
-		MinecraftVersionType.Release,
-		MinecraftVersionType.Snapshot
-	);
-
-	public static MinecraftVersionType FromString(string? type) {
-		return type switch {
-			"release"   => MinecraftVersionType.Release,
-			"snapshot"  => MinecraftVersionType.Snapshot,
-			"old_beta"  => MinecraftVersionType.OldBeta,
-			"old_alpha" => MinecraftVersionType.OldAlpha,
-			_           => MinecraftVersionType.Other
-		};
-	}
-
-	public static string ToNiceNamePlural(this MinecraftVersionType type) {
-		return type switch {
-			MinecraftVersionType.Release  => "Releases",
-			MinecraftVersionType.Snapshot => "Snapshots",
-			MinecraftVersionType.OldBeta  => "Beta",
-			MinecraftVersionType.OldAlpha => "Alpha",
-			_                             => "Unknown"
-		};
-	}
-}

Common/Phantom.Common.Data/Phantom.Common.Data.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="MemoryPack" />
+    <PackageReference Include="MessagePack.Annotations" Version="2.4.35" />
   </ItemGroup>
   
   <ItemGroup>

Common/Phantom.Common.Data/PortRange.cs

@@ -1,48 +0,0 @@
-using System.Text;
-using MemoryPack;
-
-namespace Phantom.Common.Data;
-
-[MemoryPackable]
-readonly partial record struct PortRange(
-	[property: MemoryPackOrder(0)] ushort FirstPort,
-	[property: MemoryPackOrder(1)] ushort LastPort
-) {
-	internal bool Contains(ushort port) {
-		return port >= FirstPort && port <= LastPort;
-	}
-
-	internal void ToString(StringBuilder builder) {
-		builder.Append(FirstPort);
-
-		if (LastPort != FirstPort) {
-			builder.Append('-');
-			builder.Append(LastPort);
-		}
-	}
-
-	internal static PortRange Parse(ReadOnlySpan<char> definition) {
-		int separatorIndex = definition.IndexOf('-');
-		if (separatorIndex == -1) {
-			var port = ParsePort(definition.Trim());
-			return new PortRange(port, port);
-		}
-
-		var firstPort = ParsePort(definition[..separatorIndex].Trim());
-		var lastPort = ParsePort(definition[(separatorIndex + 1)..].Trim());
-		if (lastPort < firstPort) {
-			throw new FormatException("Invalid port range '" + firstPort + "-" + lastPort + "'.");
-		}
-		else {
-			return new PortRange(firstPort, lastPort);
-		}
-	}
-
-	private static ushort ParsePort(ReadOnlySpan<char> port) {
-		try {
-			return ushort.Parse(port);
-		} catch (Exception) {
-			throw new FormatException("Invalid port '" + port.ToString() + "'.");
-		}
-	}
-}

Common/Phantom.Common.Data/RamAllocationUnits.cs

@@ -1,17 +1,17 @@
 using System.Diagnostics.CodeAnalysis;
-using MemoryPack;
+using MessagePack;
 
 namespace Phantom.Common.Data;
 
 /// <summary>
 /// Represents a number of RAM allocation units, using the conversion factor of 256 MB per unit. Supports allocations up to 16 TB minus 256 MB (65535 units).
 /// </summary>
-[MemoryPackable]
+[MessagePackObject]
 [SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
-public readonly partial record struct RamAllocationUnits(
-	[property: MemoryPackOrder(0)] ushort RawValue
+public readonly record struct RamAllocationUnits(
+	[property: Key(0)] ushort RawValue
 ) : IComparable<RamAllocationUnits> {
-	[MemoryPackIgnore]
+	[IgnoreMember]
 	public uint InMegabytes => (uint) RawValue * MegabytesPerUnit;
 
 	public int CompareTo(RamAllocationUnits other) {

Common/Phantom.Common.Data/Replies/ConfigureInstanceResult.cs

@@ -1,7 +1,8 @@
 namespace Phantom.Common.Data.Replies; 
 
-public enum ConfigureInstanceResult : byte {
+public enum ConfigureInstanceResult {
 	Success,
+	AgentShuttingDown,
 	InstanceLimitExceeded,
 	MemoryLimitExceeded
 }

Common/Phantom.Common.Data/Replies/InstanceActionGeneralResult.cs

@@ -1,8 +0,0 @@
-namespace Phantom.Common.Data.Replies;
-
-public enum InstanceActionGeneralResult : byte {
-	None,
-	AgentShuttingDown,
-	AgentIsNotResponding,
-	InstanceDoesNotExist
-}

Common/Phantom.Common.Data/Replies/InstanceActionResult.cs

@@ -1,41 +0,0 @@
-using MemoryPack;
-
-namespace Phantom.Common.Data.Replies;
-
-[MemoryPackable]
-public sealed partial record InstanceActionResult<T>(
-	[property: MemoryPackOrder(0)] InstanceActionGeneralResult GeneralResult,
-	[property: MemoryPackOrder(1)] T? ConcreteResult
-) {
-	public bool Is(T? concreteResult) {
-		return GeneralResult == InstanceActionGeneralResult.None && EqualityComparer<T>.Default.Equals(ConcreteResult, concreteResult);
-	}
-
-	public InstanceActionResult<T2> Map<T2>(Func<T, T2> mapper) {
-		return new InstanceActionResult<T2>(GeneralResult, ConcreteResult is not null ? mapper(ConcreteResult) : default);
-	}
-
-	public string ToSentence(Func<T, string> concreteResultToSentence) {
-		return GeneralResult switch {
-			InstanceActionGeneralResult.None                 => concreteResultToSentence(ConcreteResult!),
-			InstanceActionGeneralResult.AgentShuttingDown    => "Agent is shutting down.",
-			InstanceActionGeneralResult.AgentIsNotResponding => "Agent is not responding.",
-			InstanceActionGeneralResult.InstanceDoesNotExist => "Instance does not exist.",
-			_                                                => "Unknown result."
-		};
-	}
-}
-
-public static class InstanceActionResult {
-	public static InstanceActionResult<T> General<T>(InstanceActionGeneralResult generalResult) {
-		return new InstanceActionResult<T>(generalResult, default);
-	}
-
-	public static InstanceActionResult<T> Concrete<T>(T? concreteResult) {
-		return new InstanceActionResult<T>(InstanceActionGeneralResult.None, concreteResult);
-	}
-
-	public static InstanceActionResult<T> DidNotReplyIfNull<T>(this InstanceActionResult<T>? result) {
-		return result ?? General<T>(InstanceActionGeneralResult.AgentIsNotResponding);
-	}
-}

Common/Phantom.Common.Data/Replies/LaunchInstanceResult.cs

@@ -1,10 +1,13 @@
 namespace Phantom.Common.Data.Replies;
 
-public enum LaunchInstanceResult : byte {
+public enum LaunchInstanceResult {
 	LaunchInitiated,
+	AgentShuttingDown,
+	InstanceDoesNotExist,
 	InstanceAlreadyLaunching,
 	InstanceAlreadyRunning,
 	InstanceIsStopping,
+	CommunicationError,
 	UnknownError
 }
 
@@ -12,9 +15,12 @@ public static class LaunchInstanceResultExtensions {
 	public static string ToSentence(this LaunchInstanceResult reason) {
 		return reason switch {
 			LaunchInstanceResult.LaunchInitiated          => "Launch initiated.",
+			LaunchInstanceResult.AgentShuttingDown        => "Agent is shutting down.",
+			LaunchInstanceResult.InstanceDoesNotExist     => "Instance does not exist.",
 			LaunchInstanceResult.InstanceAlreadyLaunching => "Instance is already launching.",
 			LaunchInstanceResult.InstanceAlreadyRunning   => "Instance is already running.",
 			LaunchInstanceResult.InstanceIsStopping       => "Instance is stopping.",
+			LaunchInstanceResult.CommunicationError       => "Communication error.",
 			_                                             => "Unknown error."
 		};
 	}

Common/Phantom.Common.Data/Replies/SendCommandToInstanceResult.cs

@@ -1,15 +1,21 @@
 namespace Phantom.Common.Data.Replies;
 
-public enum SendCommandToInstanceResult : byte {
+public enum SendCommandToInstanceResult {
 	Success,
+	InstanceDoesNotExist,
+	AgentShuttingDown,
+	AgentCommunicationError,
 	UnknownError
 }
 
 public static class SendCommandToInstanceResultExtensions {
 	public static string ToSentence(this SendCommandToInstanceResult reason) {
 		return reason switch {
-			SendCommandToInstanceResult.Success => "Command sent.",
-			_                                   => "Unknown error."
+			SendCommandToInstanceResult.Success                 => "Command sent.",
+			SendCommandToInstanceResult.InstanceDoesNotExist    => "Instance does not exist.",
+			SendCommandToInstanceResult.AgentShuttingDown       => "Agent is shutting down.",
+			SendCommandToInstanceResult.AgentCommunicationError => "Agent did not reply in time.",
+			_                                                   => "Unknown error."
 		};
 	}
 }

Common/Phantom.Common.Data/Replies/StopInstanceResult.cs

@@ -1,9 +1,12 @@
 namespace Phantom.Common.Data.Replies;
 
-public enum StopInstanceResult : byte {
+public enum StopInstanceResult {
 	StopInitiated,
+	AgentShuttingDown,
+	InstanceDoesNotExist,
 	InstanceAlreadyStopping,
 	InstanceAlreadyStopped,
+	CommunicationError,
 	UnknownError
 }
 
@@ -11,8 +14,11 @@ public static class StopInstanceResultExtensions {
 	public static string ToSentence(this StopInstanceResult reason) {
 		return reason switch {
 			StopInstanceResult.StopInitiated           => "Stopping initiated.",
+			StopInstanceResult.AgentShuttingDown       => "Agent is shutting down.",
+			StopInstanceResult.InstanceDoesNotExist    => "Instance does not exist.",
 			StopInstanceResult.InstanceAlreadyStopping => "Instance is already stopping.",
 			StopInstanceResult.InstanceAlreadyStopped  => "Instance is already stopped.",
+			StopInstanceResult.CommunicationError      => "Communication error.",
 			_                                          => "Unknown error."
 		};
 	}

Common/Phantom.Common.Logging/Phantom.Common.Logging.csproj

@@ -7,8 +7,8 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Serilog" />
-    <PackageReference Include="Serilog.Sinks.Console" />
+    <PackageReference Include="Serilog" Version="2.12.0" />
+    <PackageReference Include="Serilog.Sinks.Console" Version="4.1.0" />
   </ItemGroup>
 
 </Project>

Common/Phantom.Common.Logging/PhantomLogger.cs

@@ -33,8 +33,8 @@ public static class PhantomLogger {
 		return Base.ForContext("Category", name);
 	}
 
-	public static ILogger Create(string name1, string name2) {
-		return Create(name1 + ":" + name2);
+	public static ILogger Create(Type type) {
+		return Create(type.Name);
 	}
 
 	public static ILogger Create<T>() {
@@ -42,11 +42,11 @@ public static class PhantomLogger {
 	}
 
 	public static ILogger Create<T>(string name) {
-		return Create(typeof(T).Name, name);
+		return Create(typeof(T).Name + ":" + name);
 	}
 
 	public static ILogger Create<T1, T2>() {
-		return Create(typeof(T1).Name, typeof(T2).Name);
+		return Create(typeof(T1).Name + ":" + typeof(T2).Name);
 	}
 
 	public static void Dispose() {

Common/Phantom.Common.Messages/BiDirectional/ReplyMessage.cs

@@ -1,18 +0,0 @@
-using MemoryPack;
-using Phantom.Utils.Rpc.Message;
-
-namespace Phantom.Common.Messages.BiDirectional;
-
-[MemoryPackable]
-public sealed partial record ReplyMessage(
-	[property: MemoryPackOrder(0)] uint SequenceId,
-	[property: MemoryPackOrder(1)] byte[] SerializedReply
-) : IMessageToServer, IMessageToAgent {
-	public Task<NoReply> Accept(IMessageToServerListener listener) {
-		return listener.HandleReply(this);
-	}
-
-	public Task<NoReply> Accept(IMessageToAgentListener listener) {
-		return listener.HandleReply(this);
-	}
-}

Common/Phantom.Common.Messages/IMessageToAgent.cs

@@ -2,6 +2,4 @@
 
 namespace Phantom.Common.Messages;
 
-public interface IMessageToAgent<TReply> : IMessage<IMessageToAgentListener, TReply> {}
-
-public interface IMessageToAgent : IMessageToAgent<NoReply> {}
+public interface IMessageToAgent : IMessage<IMessageToAgentListener> {}

Common/Phantom.Common.Messages/IMessageToAgentListener.cs

@@ -1,16 +1,12 @@
-using Phantom.Common.Data.Replies;
-using Phantom.Common.Messages.BiDirectional;
-using Phantom.Common.Messages.ToAgent;
-using Phantom.Utils.Rpc.Message;
+using Phantom.Common.Messages.ToAgent;
 
 namespace Phantom.Common.Messages;
 
 public interface IMessageToAgentListener {
-	Task<NoReply> HandleRegisterAgentSuccess(RegisterAgentSuccessMessage message);
-	Task<NoReply> HandleRegisterAgentFailure(RegisterAgentFailureMessage message);
-	Task<InstanceActionResult<ConfigureInstanceResult>> HandleConfigureInstance(ConfigureInstanceMessage message);
-	Task<InstanceActionResult<LaunchInstanceResult>> HandleLaunchInstance(LaunchInstanceMessage message);
-	Task<InstanceActionResult<StopInstanceResult>> HandleStopInstance(StopInstanceMessage message);
-	Task<InstanceActionResult<SendCommandToInstanceResult>> HandleSendCommandToInstance(SendCommandToInstanceMessage message);
-	Task<NoReply> HandleReply(ReplyMessage message);
+	Task HandleRegisterAgentSuccessResult(RegisterAgentSuccessMessage message);
+	Task HandleRegisterAgentFailureResult(RegisterAgentFailureMessage message);
+	Task HandleConfigureInstance(ConfigureInstanceMessage message);
+	Task HandleLaunchInstance(LaunchInstanceMessage message);
+	Task HandleStopInstance(StopInstanceMessage message);
+	Task HandleSendCommandToInstance(SendCommandToInstanceMessage message);
 }

Common/Phantom.Common.Messages/IMessageToServer.cs

@@ -1,7 +1,5 @@
 using Phantom.Utils.Rpc.Message;
 
-namespace Phantom.Common.Messages;
+namespace Phantom.Common.Messages; 
 
-public interface IMessageToServer<TReply> : IMessage<IMessageToServerListener, TReply> {}
-
-public interface IMessageToServer : IMessageToServer<NoReply> {}
+public interface IMessageToServer : IMessage<IMessageToServerListener> {}

Common/Phantom.Common.Messages/IMessageToServerListener.cs

@@ -1,16 +1,14 @@
-using Phantom.Common.Messages.BiDirectional;
-using Phantom.Common.Messages.ToServer;
-using Phantom.Utils.Rpc.Message;
+using Phantom.Common.Messages.ToServer;
 
 namespace Phantom.Common.Messages; 
 
 public interface IMessageToServerListener {
 	bool IsDisposed { get; }
-	Task<NoReply> HandleRegisterAgent(RegisterAgentMessage message);
-	Task<NoReply> HandleUnregisterAgent(UnregisterAgentMessage message);
-	Task<NoReply> HandleAgentIsAlive(AgentIsAliveMessage message);
-	Task<NoReply> HandleAdvertiseJavaRuntimes(AdvertiseJavaRuntimesMessage message);
-	Task<NoReply> HandleReportInstanceStatus(ReportInstanceStatusMessage message);
-	Task<NoReply> HandleInstanceOutput(InstanceOutputMessage message);
-	Task<NoReply> HandleReply(ReplyMessage message);
+	Task HandleRegisterAgent(RegisterAgentMessage message);
+	Task HandleUnregisterAgent(UnregisterAgentMessage message);
+	Task HandleAgentIsAlive(AgentIsAliveMessage message);
+	Task HandleAdvertiseJavaRuntimes(AdvertiseJavaRuntimesMessage message);
+	Task HandleReportInstanceStatus(ReportInstanceStatusMessage message);
+	Task HandleInstanceOutput(InstanceOutputMessage message);
+	Task HandleSimpleReply(SimpleReplyMessage message);
 }

Common/Phantom.Common.Messages/IMessageWithReply.cs

@@ -0,0 +1,5 @@
+namespace Phantom.Common.Messages;
+
+public interface IMessageWithReply {
+	public uint SequenceId { get; }
+}

Common/Phantom.Common.Messages/MessageRegistries.cs

@@ -1,6 +1,4 @@
-using Phantom.Common.Data.Replies;
-using Phantom.Common.Logging;
-using Phantom.Common.Messages.BiDirectional;
+using Phantom.Common.Logging;
 using Phantom.Common.Messages.ToAgent;
 using Phantom.Common.Messages.ToServer;
 using Phantom.Utils.Rpc.Message;
@@ -8,17 +6,16 @@ using Phantom.Utils.Rpc.Message;
 namespace Phantom.Common.Messages; 
 
 public static class MessageRegistries {
-	public static MessageRegistry<IMessageToAgentListener> ToAgent { get; } = new (PhantomLogger.Create("MessageRegistry:ToAgent"));
-	public static MessageRegistry<IMessageToServerListener> ToServer { get; } = new (PhantomLogger.Create("MessageRegistry:ToServer"));
+	public static MessageRegistry<IMessageToAgentListener, IMessageToAgent> ToAgent { get; } = new (PhantomLogger.Create("MessageRegistry:ToAgent"));
+	public static MessageRegistry<IMessageToServerListener, IMessageToServer> ToServer { get; } = new (PhantomLogger.Create("MessageRegistry:ToServer"));
 
 	static MessageRegistries() {
 		ToAgent.Add<RegisterAgentSuccessMessage>(0);
 		ToAgent.Add<RegisterAgentFailureMessage>(1);
-		ToAgent.Add<ConfigureInstanceMessage, InstanceActionResult<ConfigureInstanceResult>>(2);
-		ToAgent.Add<LaunchInstanceMessage, InstanceActionResult<LaunchInstanceResult>>(3);
-		ToAgent.Add<StopInstanceMessage, InstanceActionResult<StopInstanceResult>>(4);
-		ToAgent.Add<SendCommandToInstanceMessage, InstanceActionResult<SendCommandToInstanceResult>>(5);
-		ToAgent.Add<ReplyMessage>(127);
+		ToAgent.Add<ConfigureInstanceMessage>(2);
+		ToAgent.Add<LaunchInstanceMessage>(3);
+		ToAgent.Add<StopInstanceMessage>(4);
+		ToAgent.Add<SendCommandToInstanceMessage>(5);
 		
 		ToServer.Add<RegisterAgentMessage>(0);
 		ToServer.Add<UnregisterAgentMessage>(1);
@@ -26,6 +23,6 @@ public static class MessageRegistries {
 		ToServer.Add<AdvertiseJavaRuntimesMessage>(3);
 		ToServer.Add<ReportInstanceStatusMessage>(4);
 		ToServer.Add<InstanceOutputMessage>(5);
-		ToServer.Add<ReplyMessage>(127);
+		ToServer.Add<SimpleReplyMessage>(127);
 	}
 }

Common/Phantom.Common.Messages/ToAgent/ConfigureInstanceMessage.cs

@@ -1,14 +1,14 @@
-using MemoryPack;
+using MessagePack;
 using Phantom.Common.Data.Instance;
-using Phantom.Common.Data.Replies;
 
 namespace Phantom.Common.Messages.ToAgent;
 
-[MemoryPackable]
-public sealed partial record ConfigureInstanceMessage(
-	[property: MemoryPackOrder(0)] InstanceConfiguration Configuration
-) : IMessageToAgent<InstanceActionResult<ConfigureInstanceResult>> {
-	public Task<InstanceActionResult<ConfigureInstanceResult>> Accept(IMessageToAgentListener listener) {
+[MessagePackObject]
+public sealed record ConfigureInstanceMessage(
+	[property: Key(0)] uint SequenceId,
+	[property: Key(1)] InstanceConfiguration Configuration
+) : IMessageToAgent, IMessageWithReply {
+	public Task Accept(IMessageToAgentListener listener) {
 		return listener.HandleConfigureInstance(this);
 	}
 }

Common/Phantom.Common.Messages/ToAgent/LaunchInstanceMessage.cs

@@ -1,13 +1,13 @@
-using MemoryPack;
-using Phantom.Common.Data.Replies;
+using MessagePack;
 
 namespace Phantom.Common.Messages.ToAgent; 
 
-[MemoryPackable]
-public sealed partial record LaunchInstanceMessage(
-	[property: MemoryPackOrder(0)] Guid InstanceGuid
-) : IMessageToAgent<InstanceActionResult<LaunchInstanceResult>> {
-	public Task<InstanceActionResult<LaunchInstanceResult>> Accept(IMessageToAgentListener listener) {
+[MessagePackObject]
+public sealed record LaunchInstanceMessage(
+	[property: Key(0)] uint SequenceId,
+	[property: Key(1)] Guid InstanceGuid
+) : IMessageToAgent, IMessageWithReply {
+	public Task Accept(IMessageToAgentListener listener) {
 		return listener.HandleLaunchInstance(this);
 	}
 }

Common/Phantom.Common.Messages/ToAgent/RegisterAgentFailureMessage.cs

@@ -1,14 +1,13 @@
-using MemoryPack;
+using MessagePack;
 using Phantom.Common.Data.Replies;
-using Phantom.Utils.Rpc.Message;
 
 namespace Phantom.Common.Messages.ToAgent;
 
-[MemoryPackable]
-public sealed partial record RegisterAgentFailureMessage(
-	[property: MemoryPackOrder(0)] RegisterAgentFailure FailureKind
+[MessagePackObject]
+public sealed record RegisterAgentFailureMessage(
+	[property: Key(0)] RegisterAgentFailure FailureKind
 ) : IMessageToAgent {
-	public Task<NoReply> Accept(IMessageToAgentListener listener) {
-		return listener.HandleRegisterAgentFailure(this);
+	public Task Accept(IMessageToAgentListener listener) {
+		return listener.HandleRegisterAgentFailureResult(this);
 	}
 }

Common/Phantom.Common.Messages/ToAgent/RegisterAgentSuccessMessage.cs

@@ -1,15 +1,14 @@
 using System.Collections.Immutable;
-using MemoryPack;
+using MessagePack;
 using Phantom.Common.Data.Instance;
-using Phantom.Utils.Rpc.Message;
 
 namespace Phantom.Common.Messages.ToAgent;
 
-[MemoryPackable]
-public sealed partial record RegisterAgentSuccessMessage(
-	[property: MemoryPackOrder(0)] ImmutableArray<InstanceConfiguration> InitialInstances
+[MessagePackObject]
+public sealed record RegisterAgentSuccessMessage(
+	[property: Key(0)] ImmutableArray<InstanceConfiguration> InitialInstances
 ) : IMessageToAgent {
-	public Task<NoReply> Accept(IMessageToAgentListener listener) {
-		return listener.HandleRegisterAgentSuccess(this);
+	public Task Accept(IMessageToAgentListener listener) {
+		return listener.HandleRegisterAgentSuccessResult(this);
 	}
 }

Common/Phantom.Common.Messages/ToAgent/SendCommandToInstanceMessage.cs

@@ -1,14 +1,14 @@
-using MemoryPack;
-using Phantom.Common.Data.Replies;
+using MessagePack;
 
 namespace Phantom.Common.Messages.ToAgent; 
 
-[MemoryPackable]
-public sealed partial record SendCommandToInstanceMessage(
-	[property: MemoryPackOrder(0)] Guid InstanceGuid,
-	[property: MemoryPackOrder(1)] string Command
-) : IMessageToAgent<InstanceActionResult<SendCommandToInstanceResult>> {
-	public Task<InstanceActionResult<SendCommandToInstanceResult>> Accept(IMessageToAgentListener listener) {
+[MessagePackObject]
+public sealed record SendCommandToInstanceMessage(
+	[property: Key(0)] uint SequenceId,
+	[property: Key(1)] Guid InstanceGuid,
+	[property: Key(2)] string Command
+) : IMessageToAgent, IMessageWithReply {
+	public Task Accept(IMessageToAgentListener listener) {
 		return listener.HandleSendCommandToInstance(this);
 	}
 }

Common/Phantom.Common.Messages/ToAgent/StopInstanceMessage.cs

@@ -1,15 +1,13 @@
-using MemoryPack;
-using Phantom.Common.Data.Minecraft;
-using Phantom.Common.Data.Replies;
+using MessagePack;
 
 namespace Phantom.Common.Messages.ToAgent; 
 
-[MemoryPackable]
-public sealed partial record StopInstanceMessage(
-	[property: MemoryPackOrder(0)] Guid InstanceGuid,
-	[property: MemoryPackOrder(1)] MinecraftStopStrategy StopStrategy
-) : IMessageToAgent<InstanceActionResult<StopInstanceResult>> {
-	public Task<InstanceActionResult<StopInstanceResult>> Accept(IMessageToAgentListener listener) {
+[MessagePackObject]
+public sealed record StopInstanceMessage(
+	[property: Key(0)] uint SequenceId,
+	[property: Key(1)] Guid InstanceGuid
+) : IMessageToAgent, IMessageWithReply {
+	public Task Accept(IMessageToAgentListener listener) {
 		return listener.HandleStopInstance(this);
 	}
 }

Common/Phantom.Common.Messages/ToServer/AdvertiseJavaRuntimesMessage.cs

@@ -1,15 +1,14 @@
 using System.Collections.Immutable;
-using MemoryPack;
+using MessagePack;
 using Phantom.Common.Data.Java;
-using Phantom.Utils.Rpc.Message;
 
 namespace Phantom.Common.Messages.ToServer; 
 
-[MemoryPackable]
-public sealed partial record AdvertiseJavaRuntimesMessage(
-	[property: MemoryPackOrder(0)] ImmutableArray<TaggedJavaRuntime> Runtimes
+[MessagePackObject]
+public sealed record AdvertiseJavaRuntimesMessage(
+	[property: Key(0)] ImmutableArray<TaggedJavaRuntime> Runtimes
 ) : IMessageToServer {
-	public Task<NoReply> Accept(IMessageToServerListener listener) {
+	public Task Accept(IMessageToServerListener listener) {
 		return listener.HandleAdvertiseJavaRuntimes(this);
 	}
 }

Common/Phantom.Common.Messages/ToServer/AgentIsAliveMessage.cs

@@ -1,11 +1,10 @@
-using MemoryPack;
-using Phantom.Utils.Rpc.Message;
+using MessagePack;
 
 namespace Phantom.Common.Messages.ToServer; 
 
-[MemoryPackable]
-public sealed partial record AgentIsAliveMessage : IMessageToServer {
-	public Task<NoReply> Accept(IMessageToServerListener listener) {
+[MessagePackObject]
+public sealed record AgentIsAliveMessage : IMessageToServer {
+	public Task Accept(IMessageToServerListener listener) {
 		return listener.HandleAgentIsAlive(this);
 	}
 }

Common/Phantom.Common.Messages/ToServer/InstanceOutputMessage.cs

@@ -1,15 +1,14 @@
 using System.Collections.Immutable;
-using MemoryPack;
-using Phantom.Utils.Rpc.Message;
+using MessagePack;
 
 namespace Phantom.Common.Messages.ToServer;
 
-[MemoryPackable]
-public sealed partial record InstanceOutputMessage(
-	[property: MemoryPackOrder(0)] Guid InstanceGuid,
-	[property: MemoryPackOrder(1)] ImmutableArray<string> Lines
+[MessagePackObject]
+public sealed record InstanceOutputMessage(
+	[property: Key(0)] Guid InstanceGuid,
+	[property: Key(1)] ImmutableArray<string> Lines
 ) : IMessageToServer {
-	public Task<NoReply> Accept(IMessageToServerListener listener) {
+	public Task Accept(IMessageToServerListener listener) {
 		return listener.HandleInstanceOutput(this);
 	}
 }

Common/Phantom.Common.Messages/ToServer/RegisterAgentMessage.cs

@@ -1,15 +1,14 @@
-using MemoryPack;
+using MessagePack;
 using Phantom.Common.Data.Agent;
-using Phantom.Utils.Rpc.Message;
 
 namespace Phantom.Common.Messages.ToServer;
 
-[MemoryPackable]
-public sealed partial record RegisterAgentMessage(
-	[property: MemoryPackOrder(0)] AgentAuthToken AuthToken,
-	[property: MemoryPackOrder(1)] AgentInfo AgentInfo
+[MessagePackObject]
+public sealed record RegisterAgentMessage(
+	[property: Key(0)] AgentAuthToken AuthToken,
+	[property: Key(1)] AgentInfo AgentInfo
 ) : IMessageToServer {
-	public Task<NoReply> Accept(IMessageToServerListener listener) {
+	public Task Accept(IMessageToServerListener listener) {
 		return listener.HandleRegisterAgent(this);
 	}
 }

Common/Phantom.Common.Messages/ToServer/ReportInstanceStatusMessage.cs

@@ -1,15 +1,14 @@
-using MemoryPack;
+using MessagePack;
 using Phantom.Common.Data.Instance;
-using Phantom.Utils.Rpc.Message;
 
 namespace Phantom.Common.Messages.ToServer;
 
-[MemoryPackable]
-public sealed partial record ReportInstanceStatusMessage(
-	[property: MemoryPackOrder(0)] Guid InstanceGuid,
-	[property: MemoryPackOrder(1)] IInstanceStatus InstanceStatus
+[MessagePackObject]
+public sealed record ReportInstanceStatusMessage(
+	[property: Key(0)] Guid InstanceGuid,
+	[property: Key(1)] InstanceStatus InstanceStatus
 ) : IMessageToServer {
-	public Task<NoReply> Accept(IMessageToServerListener listener) {
+	public Task Accept(IMessageToServerListener listener) {
 		return listener.HandleReportInstanceStatus(this);
 	}
 }

Common/Phantom.Common.Messages/ToServer/SimpleReplyMessage.cs

@@ -0,0 +1,22 @@
+using System.Runtime.CompilerServices;
+using MessagePack;
+
+namespace Phantom.Common.Messages.ToServer;
+
+[MessagePackObject]
+public sealed record SimpleReplyMessage(
+	[property: Key(0)] uint SequenceId,
+	[property: Key(1)] int EnumValue
+) : IMessageToServer {
+	public static SimpleReplyMessage FromEnum<TEnum>(uint sequenceId, TEnum enumValue) where TEnum : Enum {
+		if (Unsafe.SizeOf<TEnum>() != Unsafe.SizeOf<int>()) {
+			throw new ArgumentException("Enum type " + typeof(TEnum).Name + " is not compatible with int.", nameof(TEnum));
+		}
+
+		return new SimpleReplyMessage(sequenceId, Unsafe.As<TEnum, int>(ref enumValue));
+	}
+
+	public Task Accept(IMessageToServerListener listener) {
+		return listener.HandleSimpleReply(this);
+	}
+}

Common/Phantom.Common.Messages/ToServer/UnregisterAgentMessage.cs

@@ -1,13 +1,12 @@
-using MemoryPack;
-using Phantom.Utils.Rpc.Message;
+using MessagePack;
 
 namespace Phantom.Common.Messages.ToServer;
 
-[MemoryPackable]
-public sealed partial record UnregisterAgentMessage(
-	[property: MemoryPackOrder(0)] Guid AgentGuid
+[MessagePackObject]
+public sealed record UnregisterAgentMessage(
+	[property: Key(0)] Guid AgentGuid
 ) : IMessageToServer {
-	public Task<NoReply> Accept(IMessageToServerListener listener) {
+	public Task Accept(IMessageToServerListener listener) {
 		return listener.HandleUnregisterAgent(this);
 	}
 }