[#60] Wallet tools in SDK

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.Client/FrostFS.SDK.Client.csproj

@@ -45,6 +45,7 @@
     <PackageReference Include="Microsoft.Extensions.Options" Version="7.0.1" />
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="7.0.0" />
     <PackageReference Include="System.Runtime.Caching" Version="7.0.0" />
+    <PackageReference Include="System.Text.Json" Version="7.0.4" />
   </ItemGroup>
 
   <ItemGroup>

src/FrostFS.SDK.Client/Tools/WalletTools.cs

@@ -0,0 +1,31 @@
+using System.Text.Json;
+using System;
+using FrostFS.SDK.Client.Wallets;
+using FrostFS.SDK.Cryptography;
+
+namespace FrostFS.SDK.Client;
+
+public static class WalletTools
+{
+    public static string GetWifFromWallet(string walletJsonText, byte[] password, int accountIndex = 0)
+    {
+        var wallet = JsonSerializer.Deserialize<Wallet>(walletJsonText) ?? throw new ArgumentException("Wrong wallet format");
+
+        if (wallet.Accounts == null || wallet.Accounts.Length < accountIndex + 1)
+        {
+            throw new ArgumentException("Wrong wallet content");
+        }
+
+        var encryptedKey = wallet.Accounts[accountIndex].Key;
+
+        if (string.IsNullOrEmpty(encryptedKey))
+        {
+            throw new ArgumentException("Cannot get encrypted WIF");
+        }
+
+        var privateKey = CryptoWallet.GetKeyFromEncodedWif(password, encryptedKey!);
+        var wif = privateKey.GetWIFFromPrivateKey();
+
+        return wif;
+    }
+}

src/FrostFS.SDK.Client/Wallets/Account.cs

@@ -0,0 +1,24 @@
+using System.Text.Json.Serialization;
+
+namespace FrostFS.SDK.Client.Wallets;
+
+public class Account
+{
+    [JsonPropertyName("address")]
+    public string? Address { get; set; }
+
+    [JsonPropertyName("key")]
+    public string? Key { get; set; }
+
+    [JsonPropertyName("label")]
+    public string? Label { get; set; }
+
+    [JsonPropertyName("contract")]
+    public Contract? Contract { get; set; }
+
+    [JsonPropertyName("lock")]
+    public bool Lock { get; set; }
+
+    [JsonPropertyName("isDefault")]
+    public bool IsDefault { get; set; }
+}

src/FrostFS.SDK.Client/Wallets/Contract.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+
+namespace FrostFS.SDK.Client.Wallets;
+
+public class Contract
+{
+    [JsonPropertyName("script")]
+    public string? Script { get; set; }
+
+    [JsonPropertyName("parameters")]
+    public Parameter[]? Parameters { get; set; }
+
+    [JsonPropertyName("deployed")]
+    public bool Deployed { get; set; }
+}

src/FrostFS.SDK.Client/Wallets/Extra.cs

@@ -0,0 +1,6 @@
+namespace FrostFS.SDK.Client.Wallets;
+
+public class Extra
+{
+    public string? Tokens { get; set; }
+}

src/FrostFS.SDK.Client/Wallets/Parameter.cs

@@ -0,0 +1,12 @@
+using System.Text.Json.Serialization;
+
+namespace FrostFS.SDK.Client.Wallets;
+
+public class Parameter
+{
+    [JsonPropertyName("name")]
+    public string? Name { get; set; }
+
+    [JsonPropertyName("type")]
+    public string? Type { get; set; }
+}

src/FrostFS.SDK.Client/Wallets/ScryptValue.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+
+namespace FrostFS.SDK.Client.Wallets;
+
+public class ScryptValue
+{
+    [JsonPropertyName("n")]
+    public int N { get; set; }
+
+    [JsonPropertyName("r")]
+    public int R { get; set; }
+
+    [JsonPropertyName("p")]
+    public int P { get; set; }
+}

src/FrostFS.SDK.Client/Wallets/Wallet.cs

@@ -0,0 +1,18 @@
+using System.Text.Json.Serialization;
+
+namespace FrostFS.SDK.Client.Wallets;
+
+public class Wallet
+{
+    [JsonPropertyName("version")]
+    public string? Version { get; set; }
+
+    [JsonPropertyName("accounts")]
+    public Account[]? Accounts { get; set; }
+
+    [JsonPropertyName("scrypt")]
+    public ScryptValue? Scrypt { get; set; }
+
+    [JsonPropertyName("extra")]
+    public Extra? Extra { get; set; }
+}