[#11] Add Network Snapshot

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

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

@@ -0,0 +1,132 @@
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using FrostFS.Netmap;
+using FrostFS.SDK.ClientV2.Mappers.GRPC.Netmap;
+using NodeInfo = FrostFS.SDK.ModelsV2.Netmap.NodeInfo;
+
+using FrostFS.SDK.ModelsV2.Netmap;
+using static FrostFS.Netmap.NetworkConfig.Types;
+
+namespace FrostFS.SDK.ClientV2;
+
+internal class NetmapServiceProvider : ContextAccessor
+{  
+    private readonly NetmapService.NetmapServiceClient netmapServiceClient;
+    
+    internal NetmapServiceProvider(NetmapService.NetmapServiceClient netmapServiceClient, ClientEnvironment context) 
+        : base(context) 
+    {
+        this.netmapServiceClient = netmapServiceClient;
+    }
+
+    internal async Task<NetworkSettings> GetNetworkSettingsAsync(Context ctx)
+    {
+        if (Context.NetworkSettings != null)
+            return Context.NetworkSettings;
+
+        var info = await GetNetworkInfoAsync(ctx);
+
+        var settings = new NetworkSettings();
+
+        foreach (var param in info.Body.NetworkInfo.NetworkConfig.Parameters)
+        {
+            SetNetworksParam(param, settings);
+        }
+
+        Context.NetworkSettings = settings;
+        
+        return settings;
+    }
+
+    internal async Task<NodeInfo> GetLocalNodeInfoAsync(Context ctx)
+    {
+        var request = new LocalNodeInfoRequest
+        {
+            Body = new LocalNodeInfoRequest.Types.Body { }
+        };
+
+        request.AddMetaHeader();
+        request.Sign(Context.Key);
+        
+        var response = await netmapServiceClient.LocalNodeInfoAsync(request, null, ctx.Deadline, ctx.CancellationToken);
+
+        //var response = await Context.InvokeAsyncUnaryWithMetrics(() =>
+        //   netmapServiceClient.LocalNodeInfoAsync(request, null, ctx.Deadline, ctx.CancellationToken),
+        //   nameof(netmapServiceClient.LocalNodeInfoAsync));
+
+        Verifier.CheckResponse(response);
+
+        return response.Body.ToModel();
+    }
+
+    internal async Task<NetworkInfoResponse> GetNetworkInfoAsync(Context ctx)
+    {
+        var request = new NetworkInfoRequest
+        {
+            Body = new NetworkInfoRequest.Types.Body { }
+        };
+
+        request.AddMetaHeader();
+        request.Sign(Context.Key);
+ 
+        var response = await netmapServiceClient.NetworkInfoAsync(request, null, ctx.Deadline, ctx.CancellationToken);
+
+        Verifier.CheckResponse(response);
+
+        return response;
+    }
+
+    internal async Task<NetmapSnapshot> GetNetmapSnapshotAsync(Context ctx)
+    {
+        var request = new NetmapSnapshotRequest
+        {
+            Body = new NetmapSnapshotRequest.Types.Body { }
+        };
+
+        request.AddMetaHeader();
+        request.Sign(Context.Key);
+ 
+        var response = await netmapServiceClient.NetmapSnapshotAsync(request, null, ctx.Deadline, ctx.CancellationToken);
+
+        Verifier.CheckResponse(response);
+
+        return response.ToModel();
+    }
+
+    private static bool GetBoolValue(byte[] bytes)
+    {
+        return bytes.Any(b => b != 0);
+    }
+
+    private static ulong GetLongValue(byte[] bytes)
+    {
+        ulong val = 0;
+        for (var i = bytes.Length - 1; i >= 0; i--)
+            val = (val << 8) + bytes[i];
+        
+        return val;
+    }
+
+    private static void SetNetworksParam(Parameter param, NetworkSettings settings)
+    { 
+        var key = Encoding.UTF8.GetString(param.Key.ToByteArray());
+
+        var valueBytes = param.Value.ToByteArray();
+        switch (key)
+        {
+            case "ContainerFee": settings.ContainerFee = GetLongValue(valueBytes); break;
+            case "EpochDuration": settings.EpochDuration = GetLongValue(valueBytes); break;
+            case "IRCandidateFee": settings.IRCandidateFee = GetLongValue(valueBytes); break;
+            case "MaxECDataCount": settings.MaxECDataCount = GetLongValue(valueBytes); break;
+            case "MaxECParityCount": settings.MaxECParityCount = GetLongValue(valueBytes); break;
+            case "MaxObjectSize": settings.MaxObjectSize = GetLongValue(valueBytes); break;
+            case "WithdrawalFee": settings.WithdrawalFee = GetLongValue(valueBytes); break;
+            case "HomomorphicHashingDisabled": settings.HomomorphicHashingDisabled = GetBoolValue(valueBytes); break;
+            case "MaintenanceModeAllowed": settings.MaintenanceModeAllowed = GetBoolValue(valueBytes); break;
+            default: settings.UnnamedSettings.Add(key, valueBytes); break;
+        }
+    }
+}
+
+