.gitignore

@@ -4,6 +4,7 @@
 *.dll
 *.so
 *.dylib
+*.pdb
 
 # Test binary, built with `go test -c`
 *.test
@@ -31,3 +32,4 @@ antlr-*.jar
 # binary
 bin/
 release/
+obj/

FrostFS.SDK.sln

@@ -1,12 +1,11 @@
-
+Microsoft Visual Studio Solution File, Format Version 12.00
-Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FrostFS.SDK.ClientV2", "src\FrostFS.SDK.ClientV2\FrostFS.SDK.ClientV2.csproj", "{50D8F61F-C302-4AC9-8D8A-AB0B8C0988C3}"
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FrostFS.SDK.ProtosV2", "src\FrostFS.SDK.ProtosV2\FrostFS.SDK.ProtosV2.csproj", "{A087047E-2505-4137-97CC-689A5AD58A0C}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FrostFS.SDK.ClientV2", "src\FrostFS.SDK.ClientV2\FrostFS.SDK.ClientV2.csproj", "{F9CE6347-111A-4CE6-8BB2-545469838F47}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FrostFS.SDK.Cryptography", "src\FrostFS.SDK.Cryptography\FrostFS.SDK.Cryptography.csproj", "{3D804F4A-B0B2-47A5-B006-BE447BE64B50}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FrostFS.SDK.Cryptography", "src\FrostFS.SDK.Cryptography\FrostFS.SDK.Cryptography.csproj", "{599E2FF8-12C0-414D-B295-4C971A0A1A63}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FrostFS.SDK.ModelsV2", "src\FrostFS.SDK.ModelsV2\FrostFS.SDK.ModelsV2.csproj", "{14DC8AC7-E310-40C2-ACDF-5BE78FC0E1B2}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FrostFS.SDK.ModelsV2", "src\FrostFS.SDK.ModelsV2\FrostFS.SDK.ModelsV2.csproj", "{3F6E5EE6-2AAC-45BE-A5E2-B83D11F90CC3}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FrostFS.SDK.ProtosV2", "src\FrostFS.SDK.ProtosV2\FrostFS.SDK.ProtosV2.csproj", "{5012EF96-9C9E-4E77-BC78-B4111EE54107}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -14,25 +13,25 @@ Global
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{A087047E-2505-4137-97CC-689A5AD58A0C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{50D8F61F-C302-4AC9-8D8A-AB0B8C0988C3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{A087047E-2505-4137-97CC-689A5AD58A0C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{50D8F61F-C302-4AC9-8D8A-AB0B8C0988C3}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{A087047E-2505-4137-97CC-689A5AD58A0C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{50D8F61F-C302-4AC9-8D8A-AB0B8C0988C3}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{A087047E-2505-4137-97CC-689A5AD58A0C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{50D8F61F-C302-4AC9-8D8A-AB0B8C0988C3}.Release|Any CPU.Build.0 = Release|Any CPU
-		{F9CE6347-111A-4CE6-8BB2-545469838F47}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3D804F4A-B0B2-47A5-B006-BE447BE64B50}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{F9CE6347-111A-4CE6-8BB2-545469838F47}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3D804F4A-B0B2-47A5-B006-BE447BE64B50}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{F9CE6347-111A-4CE6-8BB2-545469838F47}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3D804F4A-B0B2-47A5-B006-BE447BE64B50}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{F9CE6347-111A-4CE6-8BB2-545469838F47}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3D804F4A-B0B2-47A5-B006-BE447BE64B50}.Release|Any CPU.Build.0 = Release|Any CPU
-		{B04EBDF5-A446-49D6-B1D7-7D729D94E8E0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{14DC8AC7-E310-40C2-ACDF-5BE78FC0E1B2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{B04EBDF5-A446-49D6-B1D7-7D729D94E8E0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{14DC8AC7-E310-40C2-ACDF-5BE78FC0E1B2}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{B04EBDF5-A446-49D6-B1D7-7D729D94E8E0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{14DC8AC7-E310-40C2-ACDF-5BE78FC0E1B2}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{B04EBDF5-A446-49D6-B1D7-7D729D94E8E0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{14DC8AC7-E310-40C2-ACDF-5BE78FC0E1B2}.Release|Any CPU.Build.0 = Release|Any CPU
-		{599E2FF8-12C0-414D-B295-4C971A0A1A63}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5012EF96-9C9E-4E77-BC78-B4111EE54107}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{599E2FF8-12C0-414D-B295-4C971A0A1A63}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5012EF96-9C9E-4E77-BC78-B4111EE54107}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{599E2FF8-12C0-414D-B295-4C971A0A1A63}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5012EF96-9C9E-4E77-BC78-B4111EE54107}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{599E2FF8-12C0-414D-B295-4C971A0A1A63}.Release|Any CPU.Build.0 = Release|Any CPU
+		{5012EF96-9C9E-4E77-BC78-B4111EE54107}.Release|Any CPU.Build.0 = Release|Any CPU
-		{3F6E5EE6-2AAC-45BE-A5E2-B83D11F90CC3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B738F3E1-654D-41A3-B068-58ED122BB688}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{3F6E5EE6-2AAC-45BE-A5E2-B83D11F90CC3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B738F3E1-654D-41A3-B068-58ED122BB688}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{3F6E5EE6-2AAC-45BE-A5E2-B83D11F90CC3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B738F3E1-654D-41A3-B068-58ED122BB688}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{3F6E5EE6-2AAC-45BE-A5E2-B83D11F90CC3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B738F3E1-654D-41A3-B068-58ED122BB688}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal

src/FrostFS.SDK.ClientV2/Client.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Security.Cryptography;
 using FrostFS.Container;
 using FrostFS.Netmap;
@@ -14,15 +15,15 @@ namespace FrostFS.SDK.ClientV2;
 
 public partial class Client: IFrostFSClient
 {
-    private GrpcChannel _channel;
+    private GrpcChannel? _channel;
     private readonly ECDsa _key;
     public readonly OwnerId OwnerId;
-    public readonly Version Version = new (2, 13);
+    public readonly Version Version = new(2, 13);
 
-    private ContainerService.ContainerServiceClient _containerServiceClient;
+    private ContainerService.ContainerServiceClient? _containerServiceClient;
-    private NetmapService.NetmapServiceClient _netmapServiceClient;
+    private NetmapService.NetmapServiceClient? _netmapServiceClient;
-    private ObjectService.ObjectServiceClient _objectServiceClient;
+    private ObjectService.ObjectServiceClient? _objectServiceClient;
-    private SessionService.SessionServiceClient _sessionServiceClient;
+    private SessionService.SessionServiceClient? _sessionServiceClient;
 
     public Client(string key, string host)
     {

src/FrostFS.SDK.ClientV2/FrostFS.SDK.ClientV2.csproj

@@ -1,11 +1,15 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-        <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
-        <ImplicitUsings>enable</ImplicitUsings>
+    <LangVersion>12.0</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\FrostFS.SDK.Cryptography\FrostFS.SDK.Cryptography.csproj" />
     <ProjectReference Include="..\FrostFS.SDK.ModelsV2\FrostFS.SDK.ModelsV2.csproj" />

src/FrostFS.SDK.ClientV2/Interfaces/IFrostFSClient.cs

@@ -1,3 +1,7 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+
 using FrostFS.SDK.ModelsV2;
 
 namespace FrostFS.SDK.ClientV2.Interfaces;

src/FrostFS.SDK.ClientV2/Mappers/GRPC/Container.cs

@@ -1,7 +1,10 @@
+using System;
+
+using Google.Protobuf;
+
 using FrostFS.SDK.ClientV2.Mappers.GRPC.Netmap;
 using FrostFS.SDK.Cryptography;
 using FrostFS.SDK.ModelsV2.Enums;
-using Google.Protobuf;
 
 namespace FrostFS.SDK.ClientV2.Mappers.GRPC;
 
@@ -26,7 +29,7 @@ public static class ContainerMapper
         }
 
         return new ModelsV2.Container(
-            Enum.Parse<BasicAcl>(basicAclName),
+            (BasicAcl)Enum.Parse(typeof(BasicAcl), basicAclName),
             container.PlacementPolicy.ToModel()
         )
         {

src/FrostFS.SDK.ClientV2/Mappers/GRPC/Netmap/NodeInfo.cs

@@ -1,3 +1,5 @@
+using System;
+
 using FrostFS.Netmap;
 using FrostFS.SDK.ModelsV2.Enums;
 using NodeInfo = FrostFS.SDK.ModelsV2.Netmap.NodeInfo;
@@ -15,7 +17,7 @@ public static class NodeInfoMapper
         }
         return new NodeInfo
         {
-            State = Enum.Parse<NodeState>(nodeStateName),
+            State = (NodeState)Enum.Parse(typeof(NodeState), nodeStateName),
             Version = nodeInfo.Version.ToModel()
         };
     }

src/FrostFS.SDK.ClientV2/Mappers/GRPC/Netmap/PlacementPolicy.cs

@@ -1,3 +1,4 @@
+using System.Linq;
 using FrostFS.Netmap;
 
 namespace FrostFS.SDK.ClientV2.Mappers.GRPC.Netmap;

src/FrostFS.SDK.ClientV2/Mappers/GRPC/Object.cs

@@ -1,3 +1,6 @@
+using System;
+using System.Linq;
+
 using FrostFS.Object;
 using FrostFS.SDK.ModelsV2;
 using MatchType = FrostFS.Object.MatchType;
@@ -26,15 +29,11 @@ public static class ObjectFilterMapper
 {
     public static SearchRequest.Types.Body.Types.Filter ToGrpcMessage(this ObjectFilter filter)
     {
-        var objMatchTypeName = Enum.GetName(typeof(MatchType), filter.MatchType);
+        var objMatchTypeName = Enum.GetName(typeof(MatchType), filter.MatchType) 
-        if (objMatchTypeName is null)
+            ?? throw new ArgumentException($"Unknown MatchType. Value: '{filter.MatchType}'.");
-        {
-            throw new ArgumentException($"Unknown MatchType. Value: '{filter.MatchType}'.");
-        }
-
         return new SearchRequest.Types.Body.Types.Filter
         {
-            MatchType = Enum.Parse<MatchType>(objMatchTypeName),
+            MatchType = (MatchType)Enum.Parse(typeof(MatchType), objMatchTypeName),
             Key = filter.Key,
             Value = filter.Value
         };
@@ -45,18 +44,15 @@ public static class ObjectHeaderMapper
 {
     public static Header ToGrpcMessage(this ObjectHeader header)
     {
-        var objTypeName = Enum.GetName(typeof(ObjectType), header.ObjectType);
+        var objTypeName = Enum.GetName(typeof(ObjectType), header.ObjectType) 
-        if (objTypeName is null)
+            ?? throw new ArgumentException($"Unknown ObjectType. Value: '{header.ObjectType}'.");
-        {
-            throw new ArgumentException($"Unknown ObjectType. Value: '{header.ObjectType}'.");
-        }
-
         var head = new Header
         {
             Attributes = { },
             ContainerId = header.ContainerId.ToGrpcMessage(),
-            ObjectType = Enum.Parse<ObjectType>(objTypeName)
+            ObjectType = (ObjectType)Enum.Parse(typeof(ObjectType), objTypeName)
         };
+
         foreach (var attribute in header.Attributes)
         {
             head.Attributes.Add(attribute.ToGrpcMessage());
@@ -67,15 +63,11 @@ public static class ObjectHeaderMapper
 
     public static ObjectHeader ToModel(this Header header)
     {
-        var objTypeName = Enum.GetName(typeof(ModelsV2.Enums.ObjectType), header.ObjectType);
+        var objTypeName = Enum.GetName(typeof(ModelsV2.Enums.ObjectType), header.ObjectType) 
-        if (objTypeName is null)
+            ?? throw new ArgumentException($"Unknown ObjectType. Value: '{header.ObjectType}'.");
-        {
-            throw new ArgumentException($"Unknown ObjectType. Value: '{header.ObjectType}'.");
-        }
-
         return new ObjectHeader(
             ContainerId.FromHash(header.ContainerId.Value.ToByteArray()),
-            Enum.Parse<ModelsV2.Enums.ObjectType>(objTypeName),
+            (ModelsV2.Enums.ObjectType)Enum.Parse(typeof(ModelsV2.Enums.ObjectType), objTypeName),
             header.Attributes.Select(attribute => attribute.ToModel()).ToArray()
         )
         {

src/FrostFS.SDK.ClientV2/Mappers/GRPC/Status.cs

@@ -1,3 +1,4 @@
+using System;
 using FrostFS.SDK.ModelsV2.Enums;
 
 namespace FrostFS.SDK.ClientV2.Mappers.GRPC;
@@ -8,12 +9,9 @@ public static class StatusMapper
     {
         if (status is null) return new ModelsV2.Status(StatusCode.Success);
         var codeName = Enum.GetName(typeof(StatusCode), status.Code);
-        if (codeName is null)
-        {
-            throw new ArgumentException($"Unknown StatusCode. Value: '{status.Code}'.");
-        }
-
-        return new ModelsV2.Status(Enum.Parse<StatusCode>(codeName), status.Message);
         
+        return codeName is null
+            ? throw new ArgumentException($"Unknown StatusCode. Value: '{status.Code}'.")
+            : new ModelsV2.Status((StatusCode)Enum.Parse(typeof(StatusCode), codeName), status.Message);
     }
 }

src/FrostFS.SDK.ClientV2/Range.cs

@@ -0,0 +1,271 @@
+using System.Runtime.CompilerServices;
+
+namespace System
+{
+    /// <summary>Represent a type can be used to index a collection either from the start or the end.</summary>
+    /// <remarks>
+    /// Index is used by the C# compiler to support the new index syntax
+    /// <code>
+    /// int[] someArray = new int[5] { 1, 2, 3, 4, 5 } ;
+    /// int lastElement = someArray[^1]; // lastElement = 5
+    /// </code>
+    /// </remarks>
+    internal readonly struct Index : IEquatable<Index>
+    {
+        private readonly int _value;
+
+        /// <summary>Construct an Index using a value and indicating if the index is from the start or from the end.</summary>
+        /// <param name="value">The index value. it has to be zero or positive number.</param>
+        /// <param name="fromEnd">Indicating if the index is from the start or from the end.</param>
+        /// <remarks>
+        /// If the Index constructed from the end, index value 1 means pointing at the last element and index value 0 means pointing at beyond last element.
+        /// </remarks>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Index(int value, bool fromEnd = false)
+        {
+            if (value < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(value), "value must be non-negative");
+            }
+
+            if (fromEnd)
+                _value = ~value;
+            else
+                _value = value;
+        }
+
+        // The following private constructors mainly created for perf reason to avoid the checks
+        private Index(int value)
+        {
+            _value = value;
+        }
+
+        /// <summary>Create an Index pointing at first element.</summary>
+        public static Index Start => new Index(0);
+
+        /// <summary>Create an Index pointing at beyond last element.</summary>
+        public static Index End => new Index(~0);
+
+        /// <summary>Create an Index from the start at the position indicated by the value.</summary>
+        /// <param name="value">The index value from the start.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Index FromStart(int value)
+        {
+            if (value < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(value), "value must be non-negative");
+            }
+
+            return new Index(value);
+        }
+
+        /// <summary>Create an Index from the end at the position indicated by the value.</summary>
+        /// <param name="value">The index value from the end.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Index FromEnd(int value)
+        {
+            if (value < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(value), "value must be non-negative");
+            }
+
+            return new Index(~value);
+        }
+
+        /// <summary>Returns the index value.</summary>
+        public int Value
+        {
+            get
+            {
+                if (_value < 0)
+                {
+                    return ~_value;
+                }
+                else
+                {
+                    return _value;
+                }
+            }
+        }
+
+        /// <summary>Indicates whether the index is from the start or the end.</summary>
+        public bool IsFromEnd => _value < 0;
+
+        /// <summary>Calculate the offset from the start using the giving collection length.</summary>
+        /// <param name="length">The length of the collection that the Index will be used with. length has to be a positive value</param>
+        /// <remarks>
+        /// For performance reason, we don't validate the input length parameter and the returned offset value against negative values.
+        /// we don't validate either the returned offset is greater than the input length.
+        /// It is expected Index will be used with collections which always have non negative length/count. If the returned offset is negative and
+        /// then used to index a collection will get out of range exception which will be same affect as the validation.
+        /// </remarks>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public int GetOffset(int length)
+        {
+            var offset = _value;
+            if (IsFromEnd)
+            {
+                // offset = length - (~value)
+                // offset = length + (~(~value) + 1)
+                // offset = length + value + 1
+
+                offset += length + 1;
+            }
+            return offset;
+        }
+
+        /// <summary>Indicates whether the current Index object is equal to another object of the same type.</summary>
+        /// <param name="value">An object to compare with this object</param>
+        public override bool Equals(object? value) => value is Index && _value == ((Index)value)._value;
+
+        /// <summary>Indicates whether the current Index object is equal to another Index object.</summary>
+        /// <param name="other">An object to compare with this object</param>
+        public bool Equals(Index other) => _value == other._value;
+
+        /// <summary>Returns the hash code for this instance.</summary>
+        public override int GetHashCode() => _value;
+
+        /// <summary>Converts integer number to an Index.</summary>
+        public static implicit operator Index(int value) => FromStart(value);
+
+        /// <summary>Converts the value of the current Index object to its equivalent string representation.</summary>
+        public override string ToString()
+        {
+            if (IsFromEnd)
+                return "^" + ((uint)Value).ToString();
+
+            return ((uint)Value).ToString();
+        }
+    }
+
+    /// <summary>Represent a range has start and end indexes.</summary>
+    /// <remarks>
+    /// Range is used by the C# compiler to support the range syntax.
+    /// <code>
+    /// int[] someArray = new int[5] { 1, 2, 3, 4, 5 };
+    /// int[] subArray1 = someArray[0..2]; // { 1, 2 }
+    /// int[] subArray2 = someArray[1..^0]; // { 2, 3, 4, 5 }
+    /// </code>
+    /// </remarks>
+    internal readonly struct Range : IEquatable<Range>
+    {
+        /// <summary>Represent the inclusive start index of the Range.</summary>
+        public Index Start { get; }
+
+        /// <summary>Represent the exclusive end index of the Range.</summary>
+        public Index End { get; }
+
+        /// <summary>Construct a Range object using the start and end indexes.</summary>
+        /// <param name="start">Represent the inclusive start index of the range.</param>
+        /// <param name="end">Represent the exclusive end index of the range.</param>
+        public Range(Index start, Index end)
+        {
+            Start = start;
+            End = end;
+        }
+
+        /// <summary>Indicates whether the current Range object is equal to another object of the same type.</summary>
+        /// <param name="value">An object to compare with this object</param>
+        public override bool Equals(object? value) =>
+            value is Range r &&
+            r.Start.Equals(Start) &&
+            r.End.Equals(End);
+
+        /// <summary>Indicates whether the current Range object is equal to another Range object.</summary>
+        /// <param name="other">An object to compare with this object</param>
+        public bool Equals(Range other) => other.Start.Equals(Start) && other.End.Equals(End);
+
+        /// <summary>Returns the hash code for this instance.</summary>
+        public override int GetHashCode()
+        {
+            return Start.GetHashCode() * 31 + End.GetHashCode();
+        }
+
+        /// <summary>Converts the value of the current Range object to its equivalent string representation.</summary>
+        public override string ToString()
+        {
+            return Start + ".." + End;
+        }
+
+        /// <summary>Create a Range object starting from start index to the end of the collection.</summary>
+        public static Range StartAt(Index start) => new Range(start, Index.End);
+
+        /// <summary>Create a Range object starting from first element in the collection to the end Index.</summary>
+        public static Range EndAt(Index end) => new Range(Index.Start, end);
+
+        /// <summary>Create a Range object starting from first element to the end.</summary>
+        public static Range All => new Range(Index.Start, Index.End);
+
+        /// <summary>Calculate the start offset and length of range object using a collection length.</summary>
+        /// <param name="length">The length of the collection that the range will be used with. length has to be a positive value.</param>
+        /// <remarks>
+        /// For performance reason, we don't validate the input length parameter against negative values.
+        /// It is expected Range will be used with collections which always have non negative length/count.
+        /// We validate the range is inside the length scope though.
+        /// </remarks>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public (int Offset, int Length) GetOffsetAndLength(int length)
+        {
+            int start;
+            var startIndex = Start;
+            if (startIndex.IsFromEnd)
+                start = length - startIndex.Value;
+            else
+                start = startIndex.Value;
+
+            int end;
+            var endIndex = End;
+            if (endIndex.IsFromEnd)
+                end = length - endIndex.Value;
+            else
+                end = endIndex.Value;
+
+            if ((uint)end > (uint)length || (uint)start > (uint)end)
+            {
+                throw new ArgumentOutOfRangeException(nameof(length));
+            }
+
+            return (start, end - start);
+        }
+    }
+}
+
+namespace System.Runtime.CompilerServices
+{
+    internal static class RuntimeHelpers
+    {
+        /// <summary>
+        /// Slices the specified array using the specified range.
+        /// </summary>
+        public static T[] GetSubArray<T>(T[] array, Range range)
+        {
+            if (array == null)
+            {
+                throw new ArgumentNullException(nameof(array));
+            }
+
+            (int offset, int length) = range.GetOffsetAndLength(array.Length);
+
+            if (default(T) != null || typeof(T[]) == array.GetType())
+            {
+                // We know the type of the array to be exactly T[].
+
+                if (length == 0)
+                {
+                    return Array.Empty<T>();
+                }
+
+                var dest = new T[length];
+                Array.Copy(array, offset, dest, 0, length);
+                return dest;
+            }
+            else
+            {
+                // The array is actually a U[] where U:T.
+                var dest = (T[])Array.CreateInstance(array.GetType().GetElementType(), length);
+                Array.Copy(array, offset, dest, 0, length);
+                return dest;
+            }
+        }
+    }
+}

src/FrostFS.SDK.ClientV2/RequestSigner.cs

@@ -1,18 +1,22 @@
+using System;
 using System.Security.Cryptography;
-using FrostFS.Refs;
+
-using FrostFS.SDK.Cryptography;
-using FrostFS.Session;
 using Google.Protobuf;
+
 using Org.BouncyCastle.Asn1.Sec;
 using Org.BouncyCastle.Crypto.Digests;
 using Org.BouncyCastle.Crypto.Parameters;
 using Org.BouncyCastle.Crypto.Signers;
 using Org.BouncyCastle.Math;
 
-namespace FrostFS.SDK.ClientV2
+using FrostFS.Refs;
+using FrostFS.SDK.Cryptography;
+using FrostFS.Session;
+
+namespace FrostFS.SDK.ClientV2;
+
+public static class RequestSigner
 {
-    public static class RequestSigner
-    {
     public const int RFC6979SignatureSize = 64;
 
     public static byte[] SignRFC6979(this ECDsa key, byte[] data)
@@ -23,17 +27,21 @@ namespace FrostFS.SDK.ClientV2
         var privateKey = new ECPrivateKeyParameters(new BigInteger(1, key.PrivateKey()), ecParameters);
         var signer = new ECDsaSigner(new HMacDsaKCalculator(digest));
         var hash = new byte[digest.GetDigestSize()];
+    
         digest.BlockUpdate(data, 0, data.Length);
         digest.DoFinal(hash, 0);
         signer.Init(true, privateKey);
+    
         var rs = signer.GenerateSignature(hash);
         var signature = new byte[RFC6979SignatureSize];
         var rbytes = rs[0].ToByteArrayUnsigned();
         var sbytes = rs[1].ToByteArrayUnsigned();
         var index = RFC6979SignatureSize / 2 - rbytes.Length;
+    
         rbytes.CopyTo(signature, index);
         index = RFC6979SignatureSize - sbytes.Length;
         sbytes.CopyTo(signature, index);
+    
         return signature;
     }
 
@@ -85,13 +93,14 @@ namespace FrostFS.SDK.ClientV2
             IResponse => new ResponseVerificationHeader(),
             _ => throw new InvalidOperationException("Unsopported message type")
         };
+      
         var verifyOrigin = message.GetVerificationHeader();
         if (verifyOrigin is null)
             verify.BodySignature = key.SignMessagePart(message.GetBody());
+
         verify.MetaSignature = key.SignMessagePart(meta);
         verify.OriginSignature = key.SignMessagePart(verifyOrigin);
         verify.SetOrigin(verifyOrigin);
         message.SetVerificationHeader(verify);
     }
-    }
 }

src/FrostFS.SDK.ClientV2/Services/Container.cs

@@ -1,6 +1,8 @@
 using FrostFS.Container;
 using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.ModelsV2;
+using System.Collections.Generic;
+using System.Threading.Tasks;
 
 namespace FrostFS.SDK.ClientV2;
 

src/FrostFS.SDK.ClientV2/Services/Netmap.cs

@@ -1,5 +1,8 @@
-using FrostFS.Netmap;
+using System.Threading.Tasks;
+
+using FrostFS.Netmap;
 using FrostFS.SDK.ClientV2.Mappers.GRPC.Netmap;
+
 using NodeInfo = FrostFS.SDK.ModelsV2.Netmap.NodeInfo;
 
 namespace FrostFS.SDK.ClientV2;
@@ -10,11 +13,13 @@ public partial class Client
     {
         var request = new LocalNodeInfoRequest
         {
-            Body = new LocalNodeInfoRequest.Types.Body { },
+            Body = new LocalNodeInfoRequest.Types.Body { }
         };
+
         request.AddMetaHeader();
         request.Sign(_key);
         var response = await _netmapServiceClient.LocalNodeInfoAsync(request);
+ 
         return response.Body.ToModel();
     }
 
@@ -22,10 +27,12 @@ public partial class Client
     {
         var request = new NetworkInfoRequest
         {
-            Body = new NetworkInfoRequest.Types.Body { },
+            Body = new NetworkInfoRequest.Types.Body { }
         };
+
         request.AddMetaHeader();
         request.Sign(_key);
+ 
         return await _netmapServiceClient.NetworkInfoAsync(request);
     }
 }

src/FrostFS.SDK.ClientV2/Services/Object.cs

@@ -1,11 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+
+using Google.Protobuf;
+
 using FrostFS.Object;
 using FrostFS.Refs;
 using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.Cryptography;
 using FrostFS.SDK.ModelsV2;
 using FrostFS.Session;
-using Google.Protobuf;
-using Grpc.Core;
 
 namespace FrostFS.SDK.ClientV2;
 
@@ -22,12 +27,14 @@ public partial class Client
                     ContainerId = cid.ToGrpcMessage(),
                     ObjectId = oid.ToGrpcMessage()
                 }
-            },
+            }
         };
+    
         request.AddMetaHeader();
         request.Sign(_key);
         var response = await _objectServiceClient.HeadAsync(request);
         Verifier.CheckResponse(response);
+       
         return response.Body.Header.Header.ToModel();
     }
 
@@ -43,9 +50,10 @@ public partial class Client
                 {
                     ContainerId = cid.ToGrpcMessage(),
                     ObjectId = oid.ToGrpcMessage()
-                },
+                }
             }
         };
+
         request.AddMetaHeader();
         request.AddObjectSessionToken(
             sessionToken,
@@ -54,43 +62,13 @@ public partial class Client
             ObjectSessionContext.Types.Verb.Get,
             _key
         );
+
         request.Sign(_key);
-
         var obj = await GetObject(request);
+
         return obj.ToModel();
     }
 
-    private async Task<Object.Object> GetObject(GetRequest request)
-    {
-        using var stream = GetObjectInit(request);
-        var obj = await stream.ReadHeader();
-        var payload = new byte[obj.Header.PayloadLength];
-        var offset = 0;
-        var chunk = await stream.ReadChunk();
-        while (chunk is not null)
-        {
-            chunk.CopyTo(payload, offset);
-            offset += chunk.Length;
-            chunk = await stream.ReadChunk();
-        }
-
-        obj.Payload = ByteString.CopyFrom(payload);
-        return obj;
-    }
-
-    private ObjectReader GetObjectInit(GetRequest initRequest)
-    {
-        if (initRequest is null)
-        {
-            throw new ArgumentNullException(nameof(initRequest));
-        }
-
-        return new ObjectReader
-        {
-            Call = _objectServiceClient.Get(initRequest)
-        };
-    }
-
     public async Task<ObjectId> PutObjectAsync(ObjectHeader header, Stream payload)
     {
         return await PutObject(header, payload);
@@ -101,68 +79,6 @@ public partial class Client
         return await PutObject(header, new MemoryStream(payload));
     }
 
-    private async Task<ObjectId> PutObject(ObjectHeader header, Stream payload)
-    {
-        var sessionToken = await CreateSessionAsync(uint.MaxValue);
-        var hdr = header.ToGrpcMessage();
-        hdr.OwnerId = OwnerId.ToGrpcMessage();
-        hdr.Version = Version.ToGrpcMessage();
-        var oid = new ObjectID
-        {
-            Value = hdr.Sha256()
-        };
-        var request = new PutRequest
-        {
-            Body = new PutRequest.Types.Body
-            {
-                Init = new PutRequest.Types.Body.Types.Init
-                {
-                    Header = hdr
-                },
-            }
-        };
-        request.AddMetaHeader();
-        request.AddObjectSessionToken(
-            sessionToken,
-            hdr.ContainerId,
-            oid,
-            ObjectSessionContext.Types.Verb.Put,
-            _key
-        );
-        request.Sign(_key);
-
-        using var stream = await PutObjectInit(request);
-        var buffer = new byte[Constants.ObjectChunkSize];
-        var bufferLength = await payload.ReadAsync(buffer.AsMemory(0, Constants.ObjectChunkSize));
-        while (bufferLength > 0)
-        {
-            request.Body = new PutRequest.Types.Body
-            {
-                Chunk = ByteString.CopyFrom(buffer[..bufferLength]),
-            };
-            request.VerifyHeader = null;
-            request.Sign(_key);
-            await stream.Write(request);
-            bufferLength = await payload.ReadAsync(buffer.AsMemory(0, Constants.ObjectChunkSize));
-        }
-
-        var response = await stream.Close();
-        Verifier.CheckResponse(response);
-        return ObjectId.FromHash(response.Body.ObjectId.Value.ToByteArray());
-    }
-
-    private async Task<ObjectStreamer> PutObjectInit(PutRequest initRequest)
-    {
-        if (initRequest is null)
-        {
-            throw new ArgumentNullException(nameof(initRequest));
-        }
-
-        var call = _objectServiceClient.Put();
-        await call.RequestStream.WriteAsync(initRequest);
-        return new ObjectStreamer { Call = call };
-    }
-
     public async Task DeleteObjectAsync(ContainerId cid, ObjectId oid)
     {
         var request = new DeleteRequest
@@ -176,6 +92,7 @@ public partial class Client
                 }
             }
         };
+
         request.AddMetaHeader();
         request.Sign(_key);
         var response = await _objectServiceClient.DeleteAsync(request);
@@ -193,24 +110,125 @@ public partial class Client
                 Version = 1
             }
         };
+
         foreach (var filter in filters)
         {
             request.Body.Filters.Add(filter.ToGrpcMessage());
         }
         
-        ;
         request.AddMetaHeader();
         request.Sign(_key);
         var objectsIds = SearchObjects(request);
+        
         await foreach (var oid in objectsIds)
         {
             yield return ObjectId.FromHash(oid.Value.ToByteArray());
         }
     }
 
+    private async Task<Object.Object> GetObject(GetRequest request)
+    {
+        using var stream = GetObjectInit(request);
+        var obj = await stream.ReadHeader();
+        var payload = new byte[obj.Header.PayloadLength];
+        var offset = 0;
+        var chunk = await stream.ReadChunk();
+      
+        while (chunk is not null)
+        {
+            chunk.CopyTo(payload, offset);
+            offset += chunk.Length;
+            chunk = await stream.ReadChunk();
+        }
+
+        obj.Payload = ByteString.CopyFrom(payload);
+
+        return obj;
+    }
+
+    private ObjectReader GetObjectInit(GetRequest initRequest)
+    {
+        if (initRequest is null)
+            throw new ArgumentNullException(nameof(initRequest));
+        
+        return new ObjectReader
+        {
+            Call = _objectServiceClient.Get(initRequest)
+        };
+    }
+
+    private async Task<ObjectId> PutObject(ObjectHeader header, Stream payload)
+    {
+        var sessionToken = await CreateSessionAsync(uint.MaxValue);
+        var hdr = header.ToGrpcMessage();
+        hdr.OwnerId = OwnerId.ToGrpcMessage();
+        hdr.Version = Version.ToGrpcMessage();
+        
+        var oid = new ObjectID
+        {
+            Value = hdr.Sha256()
+        };
+        
+        var request = new PutRequest
+        {
+            Body = new PutRequest.Types.Body
+            {
+                Init = new PutRequest.Types.Body.Types.Init
+                {
+                    Header = hdr
+                },
+            }
+        };
+
+        request.AddMetaHeader();
+        request.AddObjectSessionToken(
+            sessionToken,
+            hdr.ContainerId,
+            oid,
+            ObjectSessionContext.Types.Verb.Put,
+            _key
+        );
+    
+        request.Sign(_key);
+
+        using var stream = await PutObjectInit(request);
+        var buffer = new byte[Constants.ObjectChunkSize];
+        var bufferLength = await payload.ReadAsync(buffer, 0, Constants.ObjectChunkSize);
+      
+        while (bufferLength > 0)
+        {
+            request.Body = new PutRequest.Types.Body
+            {
+                Chunk = ByteString.CopyFrom(buffer[..bufferLength]),
+            };
+            request.VerifyHeader = null;
+            request.Sign(_key);
+            await stream.Write(request);
+            bufferLength = await payload.ReadAsync(buffer, 0, Constants.ObjectChunkSize);
+        }
+
+        var response = await stream.Close();
+        Verifier.CheckResponse(response);
+
+        return ObjectId.FromHash(response.Body.ObjectId.Value.ToByteArray());
+    }
+
+    private async Task<ObjectStreamer> PutObjectInit(PutRequest initRequest)
+    {
+        if (initRequest is null)
+        {
+            throw new ArgumentNullException(nameof(initRequest));
+        }
+
+        var call = _objectServiceClient.Put();
+        await call.RequestStream.WriteAsync(initRequest);
+      
+        return new ObjectStreamer(call);
+    }
+
     private async IAsyncEnumerable<ObjectID> SearchObjects(SearchRequest request)
     {
-        using var stream = SearchObjectsInit(request);
+        using var stream = GetSearchReader(request);
         var ids = await stream.Read();
         while (ids is not null)
         {
@@ -218,110 +236,18 @@ public partial class Client
             {
                 yield return oid;
             }
+            
             ids = await stream.Read();
         }
     }
 
-    private SearchReader SearchObjectsInit(SearchRequest initRequest)
+    private SearchReader GetSearchReader(SearchRequest initRequest)
     {
         if (initRequest is null)
         {
             throw new ArgumentNullException(nameof(initRequest));
         }
 
-        return new SearchReader
+        return new SearchReader(_objectServiceClient.Search(initRequest));
-        {
-            Call = _objectServiceClient.Search(initRequest)
-        };
-    }
-}
-
-internal class ObjectReader : IDisposable
-{
-    public AsyncServerStreamingCall<GetResponse> Call { get; init; }
-
-    public async Task<Object.Object> ReadHeader()
-    {
-        if (!await Call.ResponseStream.MoveNext())
-        {
-            throw new InvalidOperationException("unexpect end of stream");
-        }
-
-        var response = Call.ResponseStream.Current;
-        Verifier.CheckResponse(response);
-        if (response.Body.ObjectPartCase != GetResponse.Types.Body.ObjectPartOneofCase.Init)
-            throw new InvalidOperationException("unexpect message type");
-        return new Object.Object
-        {
-            ObjectId = response.Body.Init.ObjectId,
-            Header = response.Body.Init.Header,
-        };
-    }
-
-    public async Task<byte[]?> ReadChunk()
-    {
-        if (!await Call.ResponseStream.MoveNext())
-        {
-            return null;
-        }
-
-        var response = Call.ResponseStream.Current;
-        Verifier.CheckResponse(response);
-        if (response.Body.ObjectPartCase != GetResponse.Types.Body.ObjectPartOneofCase.Chunk)
-            throw new InvalidOperationException("unexpect message type");
-        return response.Body.Chunk.ToByteArray();
-    }
-
-    public void Dispose()
-    {
-        Call.Dispose();
-    }
-}
-
-internal class ObjectStreamer : IDisposable
-{
-    public AsyncClientStreamingCall<PutRequest, PutResponse> Call { get; init; }
-
-    public async Task Write(PutRequest request)
-    {
-        if (request is null)
-        {
-            throw new ArgumentNullException(nameof(request));
-        }
-
-        await Call.RequestStream.WriteAsync(request);
-    }
-
-    public async Task<PutResponse> Close()
-    {
-        await Call.RequestStream.CompleteAsync();
-        return await Call.ResponseAsync;
-    }
-
-    public void Dispose()
-    {
-        Call.Dispose();
-    }
-}
-
-internal class SearchReader : IDisposable
-{
-    public AsyncServerStreamingCall<SearchResponse> Call { get; init; }
-
-    public async Task<List<ObjectID>?> Read()
-    {
-        if (!await Call.ResponseStream.MoveNext())
-        {
-            return null;
-        }
-
-        var response = Call.ResponseStream.Current;
-        Verifier.CheckResponse(response);
-        return response.Body?.IdList.ToList();
-    }
-
-    public void Dispose()
-    {
-        Call.Dispose();
     }
 }

src/FrostFS.SDK.ClientV2/Services/ObjectReader.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Threading.Tasks;
+
+using Grpc.Core;
+
+using FrostFS.Object;
+
+namespace FrostFS.SDK.ClientV2;
+
+internal class ObjectReader : IDisposable
+{
+    public AsyncServerStreamingCall<GetResponse> Call { get; set; }
+
+    public async Task<Object.Object> ReadHeader()
+    {
+        if (!await Call.ResponseStream.MoveNext())
+            throw new InvalidOperationException("unexpect end of stream");
+        
+        var response = Call.ResponseStream.Current;
+        Verifier.CheckResponse(response);
+        
+        if (response.Body.ObjectPartCase != GetResponse.Types.Body.ObjectPartOneofCase.Init)
+            throw new InvalidOperationException("unexpect message type");
+        
+        return new Object.Object
+        {
+            ObjectId = response.Body.Init.ObjectId,
+            Header = response.Body.Init.Header,
+        };
+    }
+
+    public async Task<byte[]?> ReadChunk()
+    {
+        if (!await Call.ResponseStream.MoveNext())
+            return null;
+        
+        var response = Call.ResponseStream.Current;
+        Verifier.CheckResponse(response);
+        
+        if (response.Body.ObjectPartCase != GetResponse.Types.Body.ObjectPartOneofCase.Chunk)
+            throw new InvalidOperationException("unexpect message type");
+
+        return response.Body.Chunk.ToByteArray();
+    }
+
+    public void Dispose()
+    {
+        Call.Dispose();
+    }
+}

src/FrostFS.SDK.ClientV2/Services/ObjectStreamer.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Threading.Tasks;
+
+using Grpc.Core;
+
+using FrostFS.Object;
+
+namespace FrostFS.SDK.ClientV2;
+
+internal class ObjectStreamer(AsyncClientStreamingCall<PutRequest, PutResponse> call) : IDisposable
+{
+    public AsyncClientStreamingCall<PutRequest, PutResponse> Call { get; private set; } = call;
+
+    public async Task Write(PutRequest request)
+    {
+        if (request is null)
+        {
+            throw new ArgumentNullException(nameof(request));
+        }
+
+        await Call.RequestStream.WriteAsync(request);
+    }
+
+    public async Task<PutResponse> Close()
+    {
+        await Call.RequestStream.CompleteAsync();
+        
+        return await Call.ResponseAsync;
+    }
+
+    public void Dispose()
+    {
+        Call.Dispose();
+    }
+}

src/FrostFS.SDK.ClientV2/Services/SearchReader.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+using Grpc.Core;
+
+using FrostFS.Object;
+using FrostFS.Refs;
+
+namespace FrostFS.SDK.ClientV2;
+
+internal class SearchReader(AsyncServerStreamingCall<SearchResponse> call) : IDisposable
+{
+    public AsyncServerStreamingCall<SearchResponse> Call { get; private set; } = call;
+
+    public async Task<List<ObjectID>?> Read()
+    {
+        if (!await Call.ResponseStream.MoveNext())
+        {
+            return null;
+        }
+
+        var response = Call.ResponseStream.Current;
+        Verifier.CheckResponse(response);
+
+        return response.Body?.IdList.ToList();
+    }
+
+    public void Dispose()
+    {
+        Call.Dispose();
+    }
+}

src/FrostFS.SDK.ClientV2/Services/Session.cs

@@ -1,3 +1,5 @@
+using System.Threading.Tasks;
+
 using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.Session;
 
@@ -15,14 +17,17 @@ public partial class Client
                 Expiration = expiration,
             }
         };
+
         request.AddMetaHeader();
         request.Sign(_key);
+
         return await CreateSession(request);
     }
 
     private async Task<SessionToken> CreateSession(CreateRequest request)
     {
         var resp = await _sessionServiceClient.CreateAsync(request);
+        
         return new SessionToken
         {
             Body = new SessionToken.Types.Body

src/FrostFS.SDK.ClientV2/Verifier.cs

@@ -1,34 +1,42 @@
+using System;
 using System.Security.Cryptography;
-using FrostFS.Refs;
+
-using FrostFS.SDK.ClientV2.Mappers.GRPC;
-using FrostFS.SDK.Cryptography;
-using FrostFS.Session;
 using Google.Protobuf;
+
 using Org.BouncyCastle.Asn1.Sec;
 using Org.BouncyCastle.Crypto.Digests;
 using Org.BouncyCastle.Crypto.Parameters;
 using Org.BouncyCastle.Crypto.Signers;
 using Org.BouncyCastle.Math;
 
-namespace FrostFS.SDK.ClientV2
+using FrostFS.Refs;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
+using FrostFS.SDK.Cryptography;
+using FrostFS.Session;
+
+namespace FrostFS.SDK.ClientV2;
+
+public static class Verifier
 {
-    public static class Verifier
-    {
     public const int RFC6979SignatureSize = 64;
 
     private static BigInteger[] DecodeSignature(byte[] sig)
     {
         if (sig.Length != RFC6979SignatureSize)
             throw new FormatException($"Wrong signature size, expect={RFC6979SignatureSize}, actual={sig.Length}");
+
         var rs = new BigInteger[2];
         rs[0] = new BigInteger(1, sig[..32]);
         rs[1] = new BigInteger(1, sig[32..]);
+
         return rs;
     }
 
     public static bool VerifyRFC6979(this byte[] publicKey, byte[] data, byte[] sig)
     {
-            if (publicKey is null || data is null || sig is null) return false;
+        if (publicKey is null || data is null || sig is null)
+            return false;
+
         var rs = DecodeSignature(sig);
         var digest = new Sha256Digest();
         var signer = new ECDsaSigner(new HMacDsaKCalculator(digest));
@@ -36,9 +44,11 @@ namespace FrostFS.SDK.ClientV2
         var ecParameters = new ECDomainParameters(secp256R1.Curve, secp256R1.G, secp256R1.N);
         var bcPublicKey = new ECPublicKeyParameters(secp256R1.Curve.DecodePoint(publicKey), ecParameters);
         var hash = new byte[digest.GetDigestSize()];
+      
         digest.BlockUpdate(data, 0, data.Length);
         digest.DoFinal(hash, 0);
         signer.Init(false, bcPublicKey);
+
         return signer.VerifySignature(hash, rs[0], rs[1]);
     }
 
@@ -54,19 +64,28 @@ namespace FrostFS.SDK.ClientV2
 
     public static bool VerifyMessagePart(this Signature sig, IMessage data)
     {
-            if (sig is null || sig.Key is null || sig.Sign is null) return false;
+        if (sig is null || sig.Key is null || sig.Sign is null)
+            return false;
+
         using var key = sig.Key.ToByteArray().LoadPublicKey();
         var data2Verify = data is null ? Array.Empty<byte>() : data.ToByteArray();
+        
         return key.VerifyData(data2Verify, sig.Sign.ToByteArray());
     }
 
     public static bool VerifyMatryoskaLevel(IMessage body, IMetaHeader meta, IVerificationHeader verification)
     {
-            if (!verification.MetaSignature.VerifyMessagePart(meta)) return false;
+        if (!verification.MetaSignature.VerifyMessagePart(meta)) 
+            return false;
+        
         var origin = verification.GetOrigin();
-            if (!verification.OriginSignature.VerifyMessagePart(origin)) return false;
+      
+        if (!verification.OriginSignature.VerifyMessagePart(origin)) 
+            return false;
+      
         if (origin is null)
             return verification.BodySignature.VerifyMessagePart(body);
+        
         return verification.BodySignature is null && VerifyMatryoskaLevel(body, meta.GetOrigin(), origin);
     }
 
@@ -79,11 +98,9 @@ namespace FrostFS.SDK.ClientV2
     {
         if (!resp.Verify())
             throw new FormatException($"invalid response, type={resp.GetType()}");
+     
         var status = resp.MetaHeader.Status.ToModel();
         if (!status.IsSuccess())
-            {
             throw new ApplicationException(status.ToString());
     }
-        }
-    }
 }

src/FrostFS.SDK.Cryptography/ArrayHelper.cs

@@ -1,9 +1,11 @@
+using System;
+using System.Linq;
 using System.Runtime.CompilerServices;
 
-namespace FrostFS.SDK.Cryptography
+namespace FrostFS.SDK.Cryptography;
+
+internal static class ArrayHelper
 {
-    internal static class ArrayHelper
-    {
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static byte[] Concat(params byte[][] buffers)
     {
@@ -19,5 +21,4 @@ namespace FrostFS.SDK.Cryptography
 
         return dst;
     }
-    }
 }

src/FrostFS.SDK.Cryptography/AssemblyInfo.cs

@@ -0,0 +1,20 @@
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// In SDK-style projects such as this one, several assembly attributes that were historically
+// defined in this file are now automatically added during build and populated with
+// values defined in project properties. For details of which attributes are included
+// and how to customise this process see: https://aka.ms/assembly-info-properties
+
+
+// Setting ComVisible to false makes the types in this assembly not visible to COM
+// components.  If you need to access a type in this assembly from COM, set the ComVisible
+// attribute to true on that type.
+
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM.
+
+[assembly: Guid("08a8487e-39ce-41fb-9c24-13f73ff2bde0")]
+
+[assembly: InternalsVisibleToAttribute("FrostFS.SDK.Cryptography.Test")]

src/FrostFS.SDK.Cryptography/Base58.cs

@@ -1,20 +1,31 @@
+using System;
+using System.Linq;
 using System.Numerics;
 using System.Text;
 
-namespace FrostFS.SDK.Cryptography
+using Org.BouncyCastle.Security.Certificates;
+
+namespace FrostFS.SDK.Cryptography;
+
+public static class Base58
 {
-    public static class Base58
-    {
     public const string Alphabet = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
 
     public static byte[] Base58CheckDecode(this string input)
     {
-            if (input is null) throw new ArgumentNullException(nameof(input));
+        if (input is null)
+            throw new ArgumentNullException(nameof(input));
+        
         byte[] buffer = Decode(input);
-            if (buffer.Length < 4) throw new FormatException();
+
-            byte[] checksum = buffer[0..(buffer.Length - 4)].Sha256().Sha256();
+        if (buffer.Length < 4) 
-            if (!buffer.AsSpan(^4).SequenceEqual(checksum.AsSpan(..4)))
             throw new FormatException();
+        
+        byte[] checksum = buffer[0..(buffer.Length - 4)].Sha256().Sha256();
+
+        if (!buffer.AsSpan(buffer.Length - 4).SequenceEqual(checksum[..4].AsSpan()))
+            throw new FormatException();
+       
         var ret = buffer[..^4];
         Array.Clear(buffer, 0, buffer.Length);
         return ret;
@@ -25,7 +36,7 @@ namespace FrostFS.SDK.Cryptography
         byte[] checksum = data.ToArray().Sha256().Sha256();
         Span<byte> buffer = stackalloc byte[data.Length + 4];
         data.CopyTo(buffer);
-            checksum.AsSpan(..4).CopyTo(buffer[data.Length..]);
+        checksum[..4].AsSpan().CopyTo(buffer[data.Length..]);
         var ret = Encode(buffer);
         buffer.Clear();
         return ret;
@@ -40,22 +51,32 @@ namespace FrostFS.SDK.Cryptography
             int digit = Alphabet.IndexOf(input[i]);
             if (digit < 0)
                 throw new FormatException($"Invalid Base58 character '{input[i]}' at position {i}");
+          
             bi = bi * Alphabet.Length + digit;
         }
 
-            // Encode BigInteger to byte[]
-            // Leading zero bytes get encoded as leading `1` characters
         int leadingZeroCount = input.TakeWhile(c => c == Alphabet[0]).Count();
         var leadingZeros = new byte[leadingZeroCount];
-            if (bi.IsZero) return leadingZeros;
+                
-            var bytesWithoutLeadingZeros = bi.ToByteArray(isUnsigned: true, isBigEndian: true);
+        if (bi.IsZero)
+            return leadingZeros;
+
+        var bytesBigEndian = bi.ToByteArray().Reverse();
+
+        var firstNonZeroIndex = 0;
+
+        while(bytesBigEndian.ElementAt(firstNonZeroIndex) == 0x0)
+            firstNonZeroIndex++;
+        
+        var bytesWithoutLeadingZeros = bytesBigEndian.Skip(firstNonZeroIndex).ToArray();
+
         return ArrayHelper.Concat(leadingZeros, bytesWithoutLeadingZeros);
     }
 
     public static string Encode(ReadOnlySpan<byte> input)
     {
-            // Decode byte[] to BigInteger
+        var data = input.ToArray().Reverse().Concat(new byte[] { 0 }).ToArray();
-            BigInteger value = new(input, isUnsigned: true, isBigEndian: true);
+        BigInteger value = new(data);
 
         // Encode BigInteger to Base58 string
         var sb = new StringBuilder();
@@ -73,5 +94,4 @@ namespace FrostFS.SDK.Cryptography
         }
         return sb.ToString();
     }
-    }
 }

src/FrostFS.SDK.Cryptography/FrostFS.SDK.Cryptography.csproj

@@ -1,13 +1,15 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-        <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
-        <ImplicitUsings>enable</ImplicitUsings>
+	  <LangVersion>12.0</LangVersion>
 	  <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
-      <PackageReference Include="BouncyCastle.NetCore" Version="2.2.1" />
+    <PackageReference Include="Google.Protobuf" Version="3.27.0" />
-      <PackageReference Include="Google.Protobuf" Version="3.26.1" />
+    <PackageReference Include="Portable.BouncyCastle" Version="1.9.0" />
+    <PackageReference Include="System.Memory" Version="4.5.5" />
   </ItemGroup>
+
 </Project>

src/FrostFS.SDK.Cryptography/Helper.cs

@@ -1,8 +1,8 @@
-using System.Buffers.Binary;
-using System.Security.Cryptography;
-using FrostFS.SDK.Cryptography.Tz;
 using Google.Protobuf;
 using Org.BouncyCastle.Crypto.Digests;
+using System;
+using System.Buffers.Binary;
+using System.Security.Cryptography;
 
 namespace FrostFS.SDK.Cryptography;
 
@@ -31,10 +31,8 @@ public static class Helper
 
     internal static byte[] Sha256(this ReadOnlySpan<byte> value)
     {
-        var buffer = new byte[32];
         using var sha256 = SHA256.Create();
-        sha256.TryComputeHash(value, buffer, out _);
+        return sha256.ComputeHash(value.ToArray());
-        return buffer;
     }
 
     public static ByteString Sha256(this IMessage data)
@@ -47,17 +45,6 @@ public static class Helper
         return ByteString.CopyFrom(data.ToByteArray().Sha256());
     }
 
-    public static ByteString TzHash(this IMessage data)
-    {
-        return ByteString.CopyFrom(new TzHash().ComputeHash(data.ToByteArray()));
-    }
-
-    public static ByteString TzHash(this ByteString data)
-    {
-        return ByteString.CopyFrom(new TzHash().ComputeHash(data.ToByteArray()));
-    }
-
-    
    
     public static ulong Murmur64(this byte[] value, uint seed)
     {

src/FrostFS.SDK.Cryptography/Key.cs

@@ -1,7 +1,10 @@
-using System.Buffers.Binary;
+using System;
+using System.Buffers.Binary;
+using System.Linq;
 using System.Numerics;
 using System.Security.Cryptography;
 using System.Text;
+
 using Org.BouncyCastle.Asn1.Sec;
 
 namespace FrostFS.SDK.Cryptography;
@@ -22,8 +25,10 @@ public static class KeyExtension
                 $"{nameof(Compress)} argument isn't uncompressed public key. " +
                 $"expected length={UncompressedPublicKeyLength}, actual={publicKey.Length}"
             );
+
         var secp256R1 = SecNamedCurves.GetByName("secp256r1");
         var point = secp256R1.Curve.DecodePoint(publicKey);
+
         return point.GetEncoded(true);
     }
 
@@ -34,8 +39,10 @@ public static class KeyExtension
                 $"{nameof(Decompress)} argument isn't compressed public key. " +
                 $"expected length={CompressedPublicKeyLength}, actual={publicKey.Length}"
             );
+
         var secp256R1 = SecNamedCurves.GetByName("secp256r1");
         var point = secp256R1.Curve.DecodePoint(publicKey);
+
         return point.GetEncoded(false);
     }
 
@@ -46,10 +53,12 @@ public static class KeyExtension
                 $"{nameof(CreateSignatureRedeemScript)} argument isn't compressed public key. " +
                 $"expected length={CompressedPublicKeyLength}, actual={publicKey.Length}"
             );
+
         var script = new byte[] { 0x0c, CompressedPublicKeyLength }; //PUSHDATA1 33
         script = ArrayHelper.Concat(script, publicKey);
         script = ArrayHelper.Concat(script, new byte[] { 0x41 }); //SYSCALL
         script = ArrayHelper.Concat(script, BitConverter.GetBytes(CheckSigDescriptor)); //Neo_Crypto_CheckSig
+
         return script;
     }
 
@@ -64,15 +73,20 @@ public static class KeyExtension
         Span<byte> data = stackalloc byte[21];
         data[0] = version;
         scriptHash.CopyTo(data[1..]);
+
         return Base58.Base58CheckEncode(data);
     }
 
     private static byte[] GetPrivateKeyFromWIF(string wif)
     {
-        if (wif == null) throw new ArgumentNullException();
+        if (wif == null) 
+            throw new ArgumentNullException();
+        
         var data = wif.Base58CheckDecode();
+        
         if (data.Length != 34 || data[0] != 0x80 || data[33] != 0x01)
             throw new FormatException();
+      
         var privateKey = new byte[32];
         Buffer.BlockCopy(data, 1, privateKey, 0, privateKey.Length);
         Array.Clear(data, 0, data.Length);
@@ -92,6 +106,7 @@ public static class KeyExtension
                 $" isn't encoded compressed public key. " +
                 $"expected length={CompressedPublicKeyLength}, actual={publicKey.Length}"
             );
+
         return publicKey.GetScriptHash().ToAddress(NeoAddressVersion);
     }
 
@@ -130,12 +145,14 @@ public static class KeyExtension
                 Y = publicKey[32..]
             }
         });
+
         return key;
     }
 
     public static ECDsa LoadWif(this string wif)
     {
         var privateKey = GetPrivateKeyFromWIF(wif);
+        
         return LoadPrivateKey(privateKey);
     }
 
@@ -151,6 +168,7 @@ public static class KeyExtension
                 Y = publicKeyFull[32..]
             }
         });
+
         return key;
     }
 }

src/FrostFS.SDK.Cryptography/Murmur3_128.cs

@@ -1,10 +1,11 @@
+using System;
 using System.Buffers.Binary;
 using System.Security.Cryptography;
 
-namespace FrostFS.SDK.Cryptography
+namespace FrostFS.SDK.Cryptography;
+
+internal class Murmur3_128 : HashAlgorithm
 {
-    internal class Murmur3_128 : HashAlgorithm
-    {
     private const ulong c1 = 0x87c37b91114253d5;
     private const ulong c2 = 0x4cf5ad432745937f;
     private const uint m = 5;
@@ -27,6 +28,7 @@ namespace FrostFS.SDK.Cryptography
         length += cbSize;
         int remainder = cbSize & 15;
         int alignedLength = ibStart + (cbSize - remainder);
+       
         for (int i = ibStart; i < alignedLength; i += 16)
         {
             ulong k1 = BinaryPrimitives.ReadUInt64LittleEndian(array.AsSpan(i));
@@ -48,6 +50,7 @@ namespace FrostFS.SDK.Cryptography
             h2 += h1;
             h2 = h2 * m + n2;
         }
+    
         if (remainder > 0)
         {
             ulong k1 = 0, k2 = 0;
@@ -98,6 +101,7 @@ namespace FrostFS.SDK.Cryptography
         h2 = Fimix64(h2);
         h1 += h2;
         h2 += h1;
+        
         return BitConverter.GetBytes(h1);
     }
 
@@ -115,7 +119,7 @@ namespace FrostFS.SDK.Cryptography
         k ^= k >> 33;
         k *= 0xc4ceb9fe1a85ec53;
         k ^= k >> 33;
+
         return k;
     }
-    }
 }

src/FrostFS.SDK.Cryptography/Range.cs

@@ -0,0 +1,271 @@
+using System.Runtime.CompilerServices;
+
+namespace System
+{
+    /// <summary>Represent a type can be used to index a collection either from the start or the end.</summary>
+    /// <remarks>
+    /// Index is used by the C# compiler to support the new index syntax
+    /// <code>
+    /// int[] someArray = new int[5] { 1, 2, 3, 4, 5 } ;
+    /// int lastElement = someArray[^1]; // lastElement = 5
+    /// </code>
+    /// </remarks>
+    internal readonly struct Index : IEquatable<Index>
+    {
+        private readonly int _value;
+
+        /// <summary>Construct an Index using a value and indicating if the index is from the start or from the end.</summary>
+        /// <param name="value">The index value. it has to be zero or positive number.</param>
+        /// <param name="fromEnd">Indicating if the index is from the start or from the end.</param>
+        /// <remarks>
+        /// If the Index constructed from the end, index value 1 means pointing at the last element and index value 0 means pointing at beyond last element.
+        /// </remarks>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public Index(int value, bool fromEnd = false)
+        {
+            if (value < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(value), "value must be non-negative");
+            }
+
+            if (fromEnd)
+                _value = ~value;
+            else
+                _value = value;
+        }
+
+        // The following private constructors mainly created for perf reason to avoid the checks
+        private Index(int value)
+        {
+            _value = value;
+        }
+
+        /// <summary>Create an Index pointing at first element.</summary>
+        public static Index Start => new Index(0);
+
+        /// <summary>Create an Index pointing at beyond last element.</summary>
+        public static Index End => new Index(~0);
+
+        /// <summary>Create an Index from the start at the position indicated by the value.</summary>
+        /// <param name="value">The index value from the start.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Index FromStart(int value)
+        {
+            if (value < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(value), "value must be non-negative");
+            }
+
+            return new Index(value);
+        }
+
+        /// <summary>Create an Index from the end at the position indicated by the value.</summary>
+        /// <param name="value">The index value from the end.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Index FromEnd(int value)
+        {
+            if (value < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(value), "value must be non-negative");
+            }
+
+            return new Index(~value);
+        }
+
+        /// <summary>Returns the index value.</summary>
+        public int Value
+        {
+            get
+            {
+                if (_value < 0)
+                {
+                    return ~_value;
+                }
+                else
+                {
+                    return _value;
+                }
+            }
+        }
+
+        /// <summary>Indicates whether the index is from the start or the end.</summary>
+        public bool IsFromEnd => _value < 0;
+
+        /// <summary>Calculate the offset from the start using the giving collection length.</summary>
+        /// <param name="length">The length of the collection that the Index will be used with. length has to be a positive value</param>
+        /// <remarks>
+        /// For performance reason, we don't validate the input length parameter and the returned offset value against negative values.
+        /// we don't validate either the returned offset is greater than the input length.
+        /// It is expected Index will be used with collections which always have non negative length/count. If the returned offset is negative and
+        /// then used to index a collection will get out of range exception which will be same affect as the validation.
+        /// </remarks>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public int GetOffset(int length)
+        {
+            var offset = _value;
+            if (IsFromEnd)
+            {
+                // offset = length - (~value)
+                // offset = length + (~(~value) + 1)
+                // offset = length + value + 1
+
+                offset += length + 1;
+            }
+            return offset;
+        }
+
+        /// <summary>Indicates whether the current Index object is equal to another object of the same type.</summary>
+        /// <param name="value">An object to compare with this object</param>
+        public override bool Equals(object? value) => value is Index && _value == ((Index)value)._value;
+
+        /// <summary>Indicates whether the current Index object is equal to another Index object.</summary>
+        /// <param name="other">An object to compare with this object</param>
+        public bool Equals(Index other) => _value == other._value;
+
+        /// <summary>Returns the hash code for this instance.</summary>
+        public override int GetHashCode() => _value;
+
+        /// <summary>Converts integer number to an Index.</summary>
+        public static implicit operator Index(int value) => FromStart(value);
+
+        /// <summary>Converts the value of the current Index object to its equivalent string representation.</summary>
+        public override string ToString()
+        {
+            if (IsFromEnd)
+                return "^" + ((uint)Value).ToString();
+
+            return ((uint)Value).ToString();
+        }
+    }
+
+    /// <summary>Represent a range has start and end indexes.</summary>
+    /// <remarks>
+    /// Range is used by the C# compiler to support the range syntax.
+    /// <code>
+    /// int[] someArray = new int[5] { 1, 2, 3, 4, 5 };
+    /// int[] subArray1 = someArray[0..2]; // { 1, 2 }
+    /// int[] subArray2 = someArray[1..^0]; // { 2, 3, 4, 5 }
+    /// </code>
+    /// </remarks>
+    internal readonly struct Range : IEquatable<Range>
+    {
+        /// <summary>Represent the inclusive start index of the Range.</summary>
+        public Index Start { get; }
+
+        /// <summary>Represent the exclusive end index of the Range.</summary>
+        public Index End { get; }
+
+        /// <summary>Construct a Range object using the start and end indexes.</summary>
+        /// <param name="start">Represent the inclusive start index of the range.</param>
+        /// <param name="end">Represent the exclusive end index of the range.</param>
+        public Range(Index start, Index end)
+        {
+            Start = start;
+            End = end;
+        }
+
+        /// <summary>Indicates whether the current Range object is equal to another object of the same type.</summary>
+        /// <param name="value">An object to compare with this object</param>
+        public override bool Equals(object? value) =>
+            value is Range r &&
+            r.Start.Equals(Start) &&
+            r.End.Equals(End);
+
+        /// <summary>Indicates whether the current Range object is equal to another Range object.</summary>
+        /// <param name="other">An object to compare with this object</param>
+        public bool Equals(Range other) => other.Start.Equals(Start) && other.End.Equals(End);
+
+        /// <summary>Returns the hash code for this instance.</summary>
+        public override int GetHashCode()
+        {
+            return Start.GetHashCode() * 31 + End.GetHashCode();
+        }
+
+        /// <summary>Converts the value of the current Range object to its equivalent string representation.</summary>
+        public override string ToString()
+        {
+            return Start + ".." + End;
+        }
+
+        /// <summary>Create a Range object starting from start index to the end of the collection.</summary>
+        public static Range StartAt(Index start) => new Range(start, Index.End);
+
+        /// <summary>Create a Range object starting from first element in the collection to the end Index.</summary>
+        public static Range EndAt(Index end) => new Range(Index.Start, end);
+
+        /// <summary>Create a Range object starting from first element to the end.</summary>
+        public static Range All => new Range(Index.Start, Index.End);
+
+        /// <summary>Calculate the start offset and length of range object using a collection length.</summary>
+        /// <param name="length">The length of the collection that the range will be used with. length has to be a positive value.</param>
+        /// <remarks>
+        /// For performance reason, we don't validate the input length parameter against negative values.
+        /// It is expected Range will be used with collections which always have non negative length/count.
+        /// We validate the range is inside the length scope though.
+        /// </remarks>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public (int Offset, int Length) GetOffsetAndLength(int length)
+        {
+            int start;
+            var startIndex = Start;
+            if (startIndex.IsFromEnd)
+                start = length - startIndex.Value;
+            else
+                start = startIndex.Value;
+
+            int end;
+            var endIndex = End;
+            if (endIndex.IsFromEnd)
+                end = length - endIndex.Value;
+            else
+                end = endIndex.Value;
+
+            if ((uint)end > (uint)length || (uint)start > (uint)end)
+            {
+                throw new ArgumentOutOfRangeException(nameof(length));
+            }
+
+            return (start, end - start);
+        }
+    }
+}
+
+namespace System.Runtime.CompilerServices
+{
+    internal static class RuntimeHelpers
+    {
+        /// <summary>
+        /// Slices the specified array using the specified range.
+        /// </summary>
+        public static T[] GetSubArray<T>(T[] array, Range range)
+        {
+            if (array == null)
+            {
+                throw new ArgumentNullException(nameof(array));
+            }
+
+            (int offset, int length) = range.GetOffsetAndLength(array.Length);
+
+            if (default(T) != null || typeof(T[]) == array.GetType())
+            {
+                // We know the type of the array to be exactly T[].
+
+                if (length == 0)
+                {
+                    return Array.Empty<T>();
+                }
+
+                var dest = new T[length];
+                Array.Copy(array, offset, dest, 0, length);
+                return dest;
+            }
+            else
+            {
+                // The array is actually a U[] where U:T.
+                var dest = (T[])Array.CreateInstance(array.GetType().GetElementType(), length);
+                Array.Copy(array, offset, dest, 0, length);
+                return dest;
+            }
+        }
+    }
+}

src/FrostFS.SDK.Cryptography/Tz/GF127.cs

@@ -1,10 +1,11 @@
-using System.Security.Cryptography;
+using System;
+using System.Security.Cryptography;
 
-namespace FrostFS.SDK.Cryptography.Tz
+namespace FrostFS.SDK.Cryptography.Tz;
+
+// GF127 represents element of GF(2^127)
+public class GF127 : IEquatable<GF127>
 {
-    // GF127 represents element of GF(2^127)
-    public class GF127 : IEquatable<GF127>
-    {
     public const int ByteSize = 16;
     public const ulong MSB64 = (ulong)1 << 63; // 2^63
     public static readonly GF127 Zero = new(0, 0);
@@ -220,8 +221,8 @@ namespace FrostFS.SDK.Cryptography.Tz
             Array.Reverse(t1);
         }
 
-            _data[0] = BitConverter.ToUInt64(t0);
+        _data[0] = BitConverter.ToUInt64(t0, 0);
-            _data[1] = BitConverter.ToUInt64(t1);
+        _data[1] = BitConverter.ToUInt64(t1, 0);
         if ((_data[1] & MSB64) != 0)
             throw new ArgumentException(nameof(data) + " invalid data");
         return this;
@@ -247,7 +248,6 @@ namespace FrostFS.SDK.Cryptography.Tz
     // ToString() returns hex-encoded representation, starting with MSB.
     public override string ToString()
     {
-            return Convert.ToHexString(ToByteArray());
+        return BitConverter.ToString(ToByteArray()).Replace("-", "");
-        }
     }
 }

src/FrostFS.SDK.Cryptography/Tz/Helper.cs

@@ -1,9 +1,10 @@
-using System.Security.Cryptography;
+using System;
+using System.Security.Cryptography;
 
-namespace FrostFS.SDK.Cryptography.Tz
+namespace FrostFS.SDK.Cryptography.Tz;
+
+public static class Helper
 {
-    public static class Helper
-    {
     public static ulong NextUlong(this RandomNumberGenerator rng)
     {
         var buff = new byte[8];
@@ -26,5 +27,4 @@ namespace FrostFS.SDK.Cryptography.Tz
     {
         return 64 - GetLeadingZeros(value);
     }
-    }
 }

src/FrostFS.SDK.Cryptography/Tz/SL2.cs

@@ -1,16 +1,21 @@
-namespace FrostFS.SDK.Cryptography.Tz
+using System;
+using System.Linq;
+
+namespace FrostFS.SDK.Cryptography.Tz;
+
+public class SL2 : IEquatable<SL2>
 {
-    public class SL2 : IEquatable<SL2>
-    {
     // 2x2 matrix
     private readonly GF127[][] data;
 
-        public static readonly SL2 ID = new(new GF127(1, 0), new GF127(0, 0),
+    public static readonly SL2 ID = new(
-                                                new GF127(0, 0), new GF127(1, 0));
+        new GF127(1, 0), new GF127(0, 0), new GF127(0, 0), new GF127(1, 0));
-        public static readonly SL2 A = new(new GF127(2, 0), new GF127(1, 0),
+ 
-                                                new GF127(1, 0), new GF127(0, 0));
+    public static readonly SL2 A = new(
-        public static readonly SL2 B = new(new GF127(2, 0), new GF127(3, 0),
+        new GF127(2, 0), new GF127(1, 0), new GF127(1, 0), new GF127(0, 0));
-                                                new GF127(1, 0), new GF127(1, 0));
+  
+    public static readonly SL2 B = new(
+        new GF127(2, 0), new GF127(3, 0), new GF127(1, 0), new GF127(1, 0));
 
     // Indexer
     public GF127[] this[int i]
@@ -27,7 +32,7 @@
     }
 
     public SL2(GF127 g00, GF127 g01, GF127 g10, GF127 g11)
-            : this(new GF127[][] { new[] { g00, g01 }, new[] { g10, g11 } })
+        : this([[g00, g01], [g10, g11]])
     {
     }
 
@@ -66,31 +71,29 @@
                this[1][1].Equals(other[1][1]);
     }
 
-
     // 2X2 matrix multiplication
     public static SL2 operator *(SL2 a, SL2 b)
     {
-            return new SL2(a[0][0] * b[0][0] + a[0][1] * b[1][0], a[0][0] * b[0][1] + a[0][1] * b[1][1],
+        return new SL2(
-                           a[1][0] * b[0][0] + a[1][1] * b[1][0], a[1][0] * b[0][1] + a[1][1] * b[1][1]);
+            a[0][0] * b[0][0] + a[0][1] * b[1][0],
+            a[0][0] * b[0][1] + a[0][1] * b[1][1],
+            a[1][0] * b[0][0] + a[1][1] * b[1][0],
+            a[1][0] * b[0][1] + a[1][1] * b[1][1]);
     }
 
     // Multiplication using strassen algorithm
     public static SL2 MulStrassen(SL2 a, SL2 b)
     {
-            GF127[] t = new GF127[7];
+        GF127[] t =
-            t[0] = (a[0][0] + a[1][1]) * (b[0][0] + b[1][1]); // t[0] == (a11 + a22) * (b11 + b22)
+        [
-
+            (a[0][0] + a[1][1]) * (b[0][0] + b[1][1]), // t[0] == (a11 + a22) * (b11 + b22)
-            t[1] = (a[1][0] + a[1][1]) * b[0][0]; // t[1] == (a21 + a22) * b11
+            (a[1][0] + a[1][1]) * b[0][0], // t[1] == (a21 + a22) * b11
-
+            (b[0][1] + b[1][1]) * a[0][0], // t[2] == (b12 + b22) * a11
-            t[2] = (b[0][1] + b[1][1]) * a[0][0]; // t[2] == (b12 + b22) * a11
+            (b[1][0] + b[0][0]) * a[1][1], // t[3] == (b21 + b11) * a22
-
+            (a[0][0] + a[0][1]) * b[1][1], // t[4] == (a11 + a12) * b22
-            t[3] = (b[1][0] + b[0][0]) * a[1][1]; // t[3] == (b21 + b11) * a22
+            (a[1][0] + a[0][0]) * (b[0][0] + b[0][1]), // t[5] == (a21 + a11) * (b11 + b12)
-
+            (a[0][1] + a[1][1]) * (b[1][0] + b[1][1]), // t[6] == (a12 + a22) * (b21 + b22)
-            t[4] = (a[0][0] + a[0][1]) * b[1][1]; // t[4] == (a11 + a12) * b22
+        ];
-
-            t[5] = (a[1][0] + a[0][0]) * (b[0][0] + b[0][1]); // t[5] == (a21 + a11) * (b11 + b12)
-
-            t[6] = (a[0][1] + a[1][1]) * (b[1][0] + b[1][1]); // t[6] == (a12 + a22) * (b21 + b22)
 
         SL2 r = new();
         r[0][1] = t[2] + t[4]; // r12 == a11*b12 + a11*b22 + a11*b22 + a12*b22 == a11*b12 + a12*b22
@@ -109,7 +112,7 @@
     public static SL2 Inv(SL2 a)
     {
         GF127[] t = new GF127[2];
-            t[0] = a[0][0] * a[1][1] + a[0][1] * a[1][0]; // 
+        t[0] = a[0][0] * a[1][1] + a[0][1] * a[1][0];
         t[1] = GF127.Inv(t[0]);
 
         SL2 r = new();
@@ -173,5 +176,4 @@
         return this[0][0].ToString() + this[0][1].ToString() +
                this[1][0].ToString() + this[1][1].ToString();
     }
-    }
 }

src/FrostFS.SDK.Cryptography/Tz/TzHash.cs

@@ -1,139 +1,140 @@
-using System.Security;
+//using System;
-using System.Security.Cryptography;
+//using System.Collections.Generic;
+//using System.Security;
+//using System.Security.Cryptography;
 
-namespace FrostFS.SDK.Cryptography.Tz
+//namespace FrostFS.SDK.Cryptography.Tz;
-{
-    public class TzHash : HashAlgorithm
-    {
-        private const int TzHashLength = 64;
-        private GF127[] x;
-        public override int HashSize => TzHashLength;
 
-        public TzHash()
+//public class TzHash : HashAlgorithm
-        {
+//{
-            Initialize();
+//    private const int TzHashLength = 64;
-        }
+//    private GF127[] x;
+//    public override int HashSize => TzHashLength;
 
-        public override void Initialize()
+//    public TzHash()
-        {
+//    {
-            x = new GF127[4];
+//        Initialize();
-            Reset();
+//    }
-            HashValue = null;
-        }
 
-        public void Reset()
+//    public override void Initialize()
-        {
+//    {
-            x[0] = new GF127(1, 0);
+//        x = new GF127[4];
-            x[1] = new GF127(0, 0);
+//        Reset();
-            x[2] = new GF127(0, 0);
+//        HashValue = null;
-            x[3] = new GF127(1, 0);
+//    }
-        }
     
-        public byte[] ToByteArray()
+//    public void Reset()
-        {
+//    {
-            var buff = new byte[HashSize];
+//        x[0] = new GF127(1, 0);
-            for (int i = 0; i < 4; i++)
+//        x[1] = new GF127(0, 0);
-            {
+//        x[2] = new GF127(0, 0);
-                Array.Copy(x[i].ToByteArray(), 0, buff, i * 16, 16);
+//        x[3] = new GF127(1, 0);
-            }
+//    }
-            return buff;
-        }
 
-        [SecurityCritical]
+//    public byte[] ToByteArray()
-        protected override void HashCore(byte[] array, int ibStart, int cbSize)
+//    {
-        {
+//        var buff = new byte[HashSize];
-            _ = HashData(array[ibStart..(ibStart + cbSize)]);
+//        for (int i = 0; i < 4; i++)
-        }
+//        {
+//            Array.Copy(x[i].ToByteArray(), 0, buff, i * 16, 16);
+//        }
+//        return buff;
+//    }
 
-        [SecurityCritical]
+//    [SecurityCritical]
-        protected override byte[] HashFinal()
+//    protected override void HashCore(byte[] array, int ibStart, int cbSize)
-        {
+//    {
-            return HashValue = ToByteArray();
+//        _ = HashData(array[ibStart..(ibStart + cbSize)]);
-        }
+//    }
 
-        [SecurityCritical]
+//    [SecurityCritical]
-        private int HashData(byte[] data)
+//    protected override byte[] HashFinal()
-        {
+//    {
-            var n = data.Length;
+//        return HashValue = ToByteArray();
-            for (int i = 0; i < n; i++)
+//    }
-            {
-                for (int j = 7; j >= 0; j--)
-                {
-                    MulBitRight(ref x[0], ref x[1], ref x[2], ref x[3], (data[i] & (1 << j)) != 0);
-                }
-            }
-            return n;
-        }
 
-        // MulBitRight() multiply A (if the bit is 0) or B (if the bit is 1) on the right side
+//    [SecurityCritical]
-        private void MulBitRight(ref GF127 c00, ref GF127 c01, ref GF127 c10, ref GF127 c11, bool bit)
+//    private int HashData(byte[] data)
-        {
+//    {
-            // plan 1
+//        var n = data.Length;
-            GF127 t;
+//        for (int i = 0; i < n; i++)
-            if (bit)
+//        {
-            {   // MulB
+//            for (int j = 7; j >= 0; j--)
-                t = c00;
+//            {
-                c00 = GF127.Mul10(c00) + c01; // c00 = c00 * x + c01
+//                MulBitRight(ref x[0], ref x[1], ref x[2], ref x[3], (data[i] & (1 << j)) != 0);
-                c01 = GF127.Mul11(t) + c01;   // c01 = c00 * (x+1) + c01
+//            }
+//        }
+//        return n;
+//    }
 
-                t = c10;
+//    // MulBitRight() multiply A (if the bit is 0) or B (if the bit is 1) on the right side
-                c10 = GF127.Mul10(c10) + c11; // c10 = c10 * x + c11
+//    private void MulBitRight(ref GF127 c00, ref GF127 c01, ref GF127 c10, ref GF127 c11, bool bit)
-                c11 = GF127.Mul11(t) + c11;   // c11 = c10 * (x+1) + c11
+//    {
-            }
+//        // plan 1
-            else
+//        GF127 t;
-            {   // MulA
+//        if (bit)
-                t = c00;
+//        {   // MulB
-                c00 = GF127.Mul10(c00) + c01; // c00 = c00 * x + c01
+//            t = c00;
-                c01 = t;                      // c01 = c00
+//            c00 = GF127.Mul10(c00) + c01; // c00 = c00 * x + c01
+//            c01 = GF127.Mul11(t) + c01;   // c01 = c00 * (x+1) + c01
 
-                t = c10;
+//            t = c10;
-                c10 = GF127.Mul10(c10) + c11; // c10 = c10 * x + c11
+//            c10 = GF127.Mul10(c10) + c11; // c10 = c10 * x + c11
-                c11 = t;                      // c11 = c10;
+//            c11 = GF127.Mul11(t) + c11;   // c11 = c10 * (x+1) + c11
-            }
+//        }
+//        else
+//        {   // MulA
+//            t = c00;
+//            c00 = GF127.Mul10(c00) + c01; // c00 = c00 * x + c01
+//            c01 = t;                      // c01 = c00
 
-            //// plan 2
+//            t = c10;
-            //var r = new SL2(c00, c01, c10, c11);
+//            c10 = GF127.Mul10(c10) + c11; // c10 = c10 * x + c11
-            //if (bit)
+//            c11 = t;                      // c11 = c10;
-            //    r.MulB();
+//        }
-            //else
-            //    r.MulA();
-        }
 
-        // Concat() performs combining of hashes based on homomorphic characteristic.
+//        //// plan 2
-        public static byte[] Concat(List<byte[]> hs)
+//        //var r = new SL2(c00, c01, c10, c11);
-        {
+//        //if (bit)
-            var r = SL2.ID;
+//        //    r.MulB();
-            foreach (var h in hs)
+//        //else
-            {
+//        //    r.MulA();
-                r *= new SL2().FromByteArray(h);
+//    }
-            }
-            return r.ToByteArray();
-        }
 
-        // Validate() checks if hashes in hs combined are equal to h.
+//    // Concat() performs combining of hashes based on homomorphic characteristic.
-        public static bool Validate(byte[] h, List<byte[]> hs)
+//    public static byte[] Concat(List<byte[]> hs)
-        {
+//    {
-            var expected = new SL2().FromByteArray(h);
+//        var r = SL2.ID;
-            var actual = new SL2().FromByteArray(Concat(hs));
+//        foreach (var h in hs)
-            return expected.Equals(actual);
+//        {
-        }
+//            r *= new SL2().FromByteArray(h);
+//        }
+//        return r.ToByteArray();
+//    }
 
-        // SubtractR() returns hash a, such that Concat(a, b) == c
+//    // Validate() checks if hashes in hs combined are equal to h.
-        public static byte[] SubstractR(byte[] b, byte[] c)
+//    public static bool Validate(byte[] h, List<byte[]> hs)
-        {
+//    {
-            var t1 = new SL2().FromByteArray(b);
+//        var expected = new SL2().FromByteArray(h);
-            var t2 = new SL2().FromByteArray(c);
+//        var actual = new SL2().FromByteArray(Concat(hs));
-            var r = t2 * SL2.Inv(t1);
+//        return expected.Equals(actual);
-            return r.ToByteArray();
+//    }
-        }
 
-        // SubtractL() returns hash b, such that Concat(a, b) == c
+//    // SubtractR() returns hash a, such that Concat(a, b) == c
-        public static byte[] SubstractL(byte[] a, byte[] c)
+//    public static byte[] SubstractR(byte[] b, byte[] c)
-        {
+//    {
-            var t1 = new SL2().FromByteArray(a);
+//        var t1 = new SL2().FromByteArray(b);
-            var t2 = new SL2().FromByteArray(c);
+//        var t2 = new SL2().FromByteArray(c);
-            var r = SL2.Inv(t1) * t2;
+//        var r = t2 * SL2.Inv(t1);
-            return r.ToByteArray();
+//        return r.ToByteArray();
-        }
+//    }
-    }
+
-}
+//    // SubtractL() returns hash b, such that Concat(a, b) == c
+//    public static byte[] SubstractL(byte[] a, byte[] c)
+//    {
+//        var t1 = new SL2().FromByteArray(a);
+//        var t2 = new SL2().FromByteArray(c);
+//        var r = SL2.Inv(t1) * t2;
+//        return r.ToByteArray();
+//    }
+//}

src/FrostFS.SDK.Cryptography/UUID.cs

@@ -1,17 +1,24 @@
 using Google.Protobuf;
+using System;
 
-namespace FrostFS.SDK.Cryptography
+namespace FrostFS.SDK.Cryptography;
+
+public static class UUIDExtension
 {
-    public static class UUIDExtension
-    {
     public static Guid ToUuid(this ByteString id)
     {
-            return Guid.Parse(Convert.ToHexString(id.ToByteArray()));
+        return Guid.Parse(BitConverter.ToString(id.ToByteArray()).Replace("-", ""));
     }
     
     public static byte[] ToBytes(this Guid id)
     {
-            return Convert.FromHexString(id.ToString("N"));
+        var str = id.ToString("N");
-        }
+        var len = str.Length;
+        var bytes = new byte[len/2];
+
+        for (int i = 0; i < len; i += 2)
+            bytes[i/2] = Convert.ToByte(str.Substring(i, 2), 16);
+        
+        return bytes;
     }
 }

src/FrostFS.SDK.ModelsV2/Container.cs

@@ -1,3 +1,5 @@
+using System;
+
 using FrostFS.SDK.ModelsV2.Enums;
 using FrostFS.SDK.ModelsV2.Netmap;
 

src/FrostFS.SDK.ModelsV2/ContainerId.cs

@@ -1,4 +1,6 @@
-using FrostFS.SDK.Cryptography;
+using System;
+
+using FrostFS.SDK.Cryptography;
 
 namespace FrostFS.SDK.ModelsV2;
 
@@ -14,9 +16,8 @@ public class ContainerId
     public static ContainerId FromHash(byte[] hash)
     {
         if (hash.Length != Constants.Sha256HashLength)
-        {
             throw new FormatException("ContainerID must be a sha256 hash.");
-        }
+        
         return new ContainerId(Base58.Encode(hash));
     }
 

src/FrostFS.SDK.ModelsV2/FrostFS.SDK.ModelsV2.csproj

@@ -1,8 +1,8 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-        <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
-        <ImplicitUsings>enable</ImplicitUsings>
+	  <LangVersion>12.0</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 

src/FrostFS.SDK.ModelsV2/Netmap/PlacementPolicy.cs

@@ -2,8 +2,8 @@ namespace FrostFS.SDK.ModelsV2.Netmap;
 
 public class PlacementPolicy
 {
-    public Replica[] Replicas { get; init; }
+    public Replica[] Replicas { get; private set; }
-    public bool Unique { get; init; }
+    public bool Unique { get; private set; }
 
     public PlacementPolicy(bool unique, params Replica[] replicas)
     {

src/FrostFS.SDK.ModelsV2/ObjectId.cs

@@ -1,4 +1,6 @@
-using FrostFS.SDK.Cryptography;
+using System;
+
+using FrostFS.SDK.Cryptography;
 
 namespace FrostFS.SDK.ModelsV2;
 

src/FrostFS.SDK.ModelsV2/OwnerId.cs

@@ -1,4 +1,5 @@
 using System.Security.Cryptography;
+
 using FrostFS.SDK.Cryptography;
 
 namespace FrostFS.SDK.ModelsV2;

src/FrostFS.SDK.ProtosV2/FrostFS.SDK.ProtosV2.csproj

@@ -1,19 +1,19 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-        <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
-        <ImplicitUsings>enable</ImplicitUsings>
+	  <LangVersion>12.0</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Google.Protobuf" Version="3.26.1" />
-      <PackageReference Include="Grpc.Core" Version="2.46.6" />
+    <PackageReference Include="Grpc.Net.Client" Version="2.62.0" />
-      <PackageReference Include="Grpc.Net.ClientFactory" Version="2.62.0" />
+    <PackageReference Include="Grpc.Tools" Version="2.64.0">
-      <PackageReference Include="Grpc.Tools" Version="2.63.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+     
   </ItemGroup>
 
   <ItemGroup>
@@ -29,5 +29,4 @@
 	<Protobuf Include="status\*.proto" GrpcServices="Client" />
 	<Protobuf Include="tombstone\*.proto" GrpcServices="Client" />
   </ItemGroup>
-
 </Project>

src/FrostFS.SDK.ProtosV2/Interfaces/IMetaHeader.cs

@@ -1,9 +1,8 @@
 using Google.Protobuf;
 
-namespace FrostFS.Session
+namespace FrostFS.Session;
+
+public interface IMetaHeader : IMessage
 {
-    public interface IMetaHeader : IMessage
-    {
     IMetaHeader GetOrigin();
-    }
 }

src/FrostFS.SDK.ProtosV2/Interfaces/IRequest.cs

@@ -1,8 +1,7 @@
-namespace FrostFS.Session
+namespace FrostFS.Session;
+
+public interface IRequest : IVerificableMessage
 {
-    public interface IRequest : IVerificableMessage
-    {
     RequestMetaHeader MetaHeader { get; set; }
     RequestVerificationHeader VerifyHeader { get; set; }
-    }
 }

src/FrostFS.SDK.ProtosV2/Interfaces/IResponse.cs

@@ -1,8 +1,7 @@
-namespace FrostFS.Session
+namespace FrostFS.Session;
+
+public interface IResponse : IVerificableMessage
 {
-    public interface IResponse : IVerificableMessage
-    {
     ResponseMetaHeader MetaHeader { get; set; }
     ResponseVerificationHeader VerifyHeader { get; set; }
-    }
 }

src/FrostFS.SDK.ProtosV2/Interfaces/IVerifiableMessage.cs

@@ -1,13 +1,12 @@
 using Google.Protobuf;
 
-namespace FrostFS.Session
+namespace FrostFS.Session;
+
+public interface IVerificableMessage : IMessage
 {
-    public interface IVerificableMessage : IMessage
-    {
     IMetaHeader GetMetaHeader();
     void SetMetaHeader(IMetaHeader metaHeader);
     IVerificationHeader GetVerificationHeader();
     void SetVerificationHeader(IVerificationHeader verificationHeader);
     IMessage GetBody();
-    }
 }

src/FrostFS.SDK.ProtosV2/Interfaces/IVerificationHeader.cs

@@ -1,14 +1,13 @@
 using FrostFS.Refs;
 using Google.Protobuf;
 
-namespace FrostFS.Session
+namespace FrostFS.Session;
+
+public interface IVerificationHeader : IMessage
 {
-    public interface IVerificationHeader : IMessage
-    {
     Signature BodySignature { get; set; }
     Signature MetaSignature { get; set; }
     Signature OriginSignature { get; set; }
     IVerificationHeader GetOrigin();
     void SetOrigin(IVerificationHeader verificationHeader);
-    }
 }

src/FrostFS.SDK.ProtosV2/container/Extension.Message.cs

@@ -1,10 +1,11 @@
-using FrostFS.Session;
 using Google.Protobuf;
 
-namespace FrostFS.Container
+using FrostFS.Session;
+
+namespace FrostFS.Container;
+
+public partial class AnnounceUsedSpaceRequest : IRequest
 {
-    public partial class AnnounceUsedSpaceRequest : IRequest
-    {
     IMetaHeader IVerificableMessage.GetMetaHeader()
     {
         return MetaHeader;
@@ -29,369 +30,368 @@ namespace FrostFS.Container
     {
         return Body;
     }
-    }
+}
-
+
-    public partial class AnnounceUsedSpaceResponse : IResponse
+public partial class AnnounceUsedSpaceResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class GetRequest : IRequest
+public partial class GetRequest : IRequest
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (RequestMetaHeader)metaHeader;
+        MetaHeader = (RequestMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (RequestVerificationHeader)verificationHeader;
+        VerifyHeader = (RequestVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class GetResponse : IResponse
+public partial class GetResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class PutRequest : IRequest
+public partial class PutRequest : IRequest
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (RequestMetaHeader)metaHeader;
+        MetaHeader = (RequestMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (RequestVerificationHeader)verificationHeader;
+        VerifyHeader = (RequestVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class PutResponse : IResponse
+public partial class PutResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class DeleteRequest : IRequest
+public partial class DeleteRequest : IRequest
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (RequestMetaHeader)metaHeader;
+        MetaHeader = (RequestMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (RequestVerificationHeader)verificationHeader;
+        VerifyHeader = (RequestVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class DeleteResponse : IResponse
+public partial class DeleteResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class ListRequest : IRequest
+public partial class ListRequest : IRequest
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (RequestMetaHeader)metaHeader;
+        MetaHeader = (RequestMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (RequestVerificationHeader)verificationHeader;
+        VerifyHeader = (RequestVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class ListResponse : IResponse
+public partial class ListResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class SetExtendedACLRequest : IRequest
+public partial class SetExtendedACLRequest : IRequest
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (RequestMetaHeader)metaHeader;
+        MetaHeader = (RequestMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (RequestVerificationHeader)verificationHeader;
+        VerifyHeader = (RequestVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class SetExtendedACLResponse : IResponse
+public partial class SetExtendedACLResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class GetExtendedACLRequest : IRequest
+public partial class GetExtendedACLRequest : IRequest
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (RequestMetaHeader)metaHeader;
+        MetaHeader = (RequestMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (RequestVerificationHeader)verificationHeader;
+        VerifyHeader = (RequestVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class GetExtendedACLResponse : IResponse
+public partial class GetExtendedACLResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
 }

src/FrostFS.SDK.ProtosV2/netmap/Extension.Message.cs

@@ -1,10 +1,10 @@
 using FrostFS.Session;
 using Google.Protobuf;
 
-namespace FrostFS.Netmap
+namespace FrostFS.Netmap;
+
+public partial class LocalNodeInfoRequest : IRequest
 {
-    public partial class LocalNodeInfoRequest : IRequest
-    {
     IMetaHeader IVerificableMessage.GetMetaHeader()
     {
         return MetaHeader;
@@ -29,89 +29,88 @@ namespace FrostFS.Netmap
     {
         return Body;
     }
-    }
+}
-
+
-    public partial class LocalNodeInfoResponse : IResponse
+public partial class LocalNodeInfoResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class NetworkInfoRequest : IRequest
+public partial class NetworkInfoRequest : IRequest
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (RequestMetaHeader)metaHeader;
+        MetaHeader = (RequestMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (RequestVerificationHeader)verificationHeader;
+        VerifyHeader = (RequestVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
+}
-
+
-    public partial class NetworkInfoResponse : IResponse
+public partial class NetworkInfoResponse : IResponse
-    {
+{
-        IMetaHeader IVerificableMessage.GetMetaHeader()
+    IMetaHeader IVerificableMessage.GetMetaHeader()
-        {
+    {
-            return MetaHeader;
+        return MetaHeader;
-        }
+    }
-
+
-        IVerificationHeader IVerificableMessage.GetVerificationHeader()
+    IVerificationHeader IVerificableMessage.GetVerificationHeader()
-        {
+    {
-            return VerifyHeader;
+        return VerifyHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
+    void IVerificableMessage.SetMetaHeader(IMetaHeader metaHeader)
-        {
+    {
-            MetaHeader = (ResponseMetaHeader)metaHeader;
+        MetaHeader = (ResponseMetaHeader)metaHeader;
-        }
+    }
-
+
-        void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
+    void IVerificableMessage.SetVerificationHeader(IVerificationHeader verificationHeader)
-        {
+    {
-            VerifyHeader = (ResponseVerificationHeader)verificationHeader;
+        VerifyHeader = (ResponseVerificationHeader)verificationHeader;
-        }
+    }
-
+
-        public IMessage GetBody()
+    public IMessage GetBody()
-        {
+    {
-            return Body;
+        return Body;
-        }
+    }
-    }
 }

src/FrostFS.SDK.ProtosV2/session/Extension.Message.cs

@@ -1,9 +1,9 @@
 using Google.Protobuf;
 
-namespace FrostFS.Session
+namespace FrostFS.Session;
+
+public partial class CreateResponse : IResponse
 {
-    public partial class CreateResponse : IResponse
-    {
     IMetaHeader IVerificableMessage.GetMetaHeader()
     {
         return MetaHeader;
@@ -28,10 +28,10 @@ namespace FrostFS.Session
     {
         return Body;
     }
-    }
+}
 
-    public partial class CreateRequest : IRequest
+public partial class CreateRequest : IRequest
-    {
+{
     IMetaHeader IVerificableMessage.GetMetaHeader()
     {
         return MetaHeader;
@@ -56,5 +56,4 @@ namespace FrostFS.Session
     {
         return Body;
     }
-    }
 }

src/FrostFS.SDK.ProtosV2/session/Extension.MetaHeader.cs

@@ -1,18 +1,17 @@
-namespace FrostFS.Session
+namespace FrostFS.Session;
-{
-    public partial class RequestMetaHeader : IMetaHeader
-    {
-        public IMetaHeader GetOrigin()
-        {
-            return Origin;
-        }
-    }
 
-    public partial class ResponseMetaHeader : IMetaHeader
+public partial class RequestMetaHeader : IMetaHeader
-    {
+{
+    public IMetaHeader GetOrigin()
+    {
+        return Origin;
+    }
+}
+
+public partial class ResponseMetaHeader : IMetaHeader
+{
     public IMetaHeader GetOrigin()
     {
         return Origin;
     }
-    }
 }

src/FrostFS.SDK.ProtosV2/session/Extension.VerificationHeader.cs

@@ -1,7 +1,7 @@
-namespace FrostFS.Session
+namespace FrostFS.Session;
+
+public partial class RequestVerificationHeader : IVerificationHeader
 {
-    public partial class RequestVerificationHeader : IVerificationHeader
-    {
     IVerificationHeader IVerificationHeader.GetOrigin()
     {
         return Origin;
@@ -11,10 +11,10 @@ namespace FrostFS.Session
     {
         Origin = (RequestVerificationHeader)verificationHeader;
     }
-    }
+}
 
-    public partial class ResponseVerificationHeader : IVerificationHeader
+public partial class ResponseVerificationHeader : IVerificationHeader
-    {
+{
     IVerificationHeader IVerificationHeader.GetOrigin()
     {
         return Origin;
@@ -24,5 +24,4 @@ namespace FrostFS.Session
     {
         Origin = (ResponseVerificationHeader)verificationHeader;
     }
-    }
 }

src/FrostFS.SDK.ProtosV2/session/Extension.XHeader.cs

@@ -1,9 +1,8 @@
-namespace FrostFS.Session
+namespace FrostFS.Session;
+
+public partial class XHeader
 {
-    public partial class XHeader
-    {
     public const string ReservedXHeaderPrefix = "__NEOFS__";
     public const string XHeaderNetmapEpoch = ReservedXHeaderPrefix + "NETMAP_EPOCH";
     public const string XHeaderNetmapLookupDepth = ReservedXHeaderPrefix + "NETMAP_LOOKUP_DEPTH";
-    }
 }