Add method: show state (#463)

* show state

* Update ShowCommand.State.cs

* Update command-reference.md

docs/command-reference.md

@@ -640,6 +640,20 @@ The `show transaction` displays the contents of a transaction specified by hash
 
 `show tx` is an alias for `show transaction`
 
+### neoxp show state
+
+``` 
+Usage: neoxp show state
+```
+
+Outputs the current block height, running status, and configuration file location. Example:
+
+```
+Block height: 111
+IsRunning: False
+Config file: C:\Users\bitco\.neo-express\default.neo-express
+```
+
 ## neoxp candidate
 
 The `candidate` command has a series of subcommands for managing candidates election in the Neo-Express blockchain.

src/neoxp/Commands/ShowCommand.State.cs

@@ -0,0 +1,54 @@
+// Copyright (C) 2015-2024 The Neo Project.
+//
+// ShowCommand.State.cs file belongs to neo-express project and is free
+// software distributed under the MIT software license, see the
+// accompanying file LICENSE in the main directory of the
+// repository or http://www.opensource.org/licenses/mit-license.php
+// for more details.
+//
+// Redistribution and use in source and binary forms with or without
+// modifications are permitted.
+
+using McMaster.Extensions.CommandLineUtils;
+
+namespace NeoExpress.Commands
+{
+    partial class ShowCommand
+    {
+        [Command("state", Description = "Show state")]
+        internal class State
+        {
+            readonly ExpressChainManagerFactory chainManagerFactory;
+
+            public State(ExpressChainManagerFactory chainManagerFactory)
+            {
+                this.chainManagerFactory = chainManagerFactory;
+            }
+
+            [Argument(0, Description = "Optional block hash or index. Show most recent block if unspecified")]
+            internal string BlockHash { get; init; } = string.Empty;
+
+            [Option(Description = "Path to neo-express data file")]
+            internal string Input { get; init; } = string.Empty;
+
+            internal async Task<int> OnExecuteAsync(CommandLineApplication app, IConsole console)
+            {
+                try
+                {
+                    var (chainManager, config) = chainManagerFactory.LoadChain(Input);
+                    using var expressNode = chainManager.GetExpressNode();
+                    var blockHeight = (await expressNode.GetLatestBlockAsync().ConfigureAwait(false)).Index;
+                    console.WriteLine($"Block height: {blockHeight}");
+                    console.WriteLine($"IsRunning: {chainManager.IsRunning(null)}");
+                    console.WriteLine($"Config file: {config}");
+                    return 0;
+                }
+                catch (Exception ex)
+                {
+                    app.WriteException(ex);
+                    return 1;
+                }
+            }
+        }
+    }
+}

src/neoxp/Commands/ShowCommand.cs

@@ -14,7 +14,7 @@
 namespace NeoExpress.Commands
 {
     [Command("show", Description = "Show information")]
-    [Subcommand(typeof(Balance), typeof(Balances), typeof(Block), typeof(Notifications), typeof(Transaction), typeof(NFT))]
+    [Subcommand(typeof(Balance), typeof(Balances), typeof(Block), typeof(Notifications), typeof(Transaction), typeof(NFT), typeof(State))]
     partial class ShowCommand
     {
         internal int OnExecute(CommandLineApplication app, IConsole console)