Added basic spec classes

src/Nethermind/Nethermind.Core/SealEngineType.cs

@@ -13,5 +13,6 @@ public static class SealEngineType
         public const string BeaconChain = nameof(BeaconChain);
         public const string Optimism = nameof(Optimism);
         public const string Taiko = nameof(Taiko);
+        public const string XDPoS = nameof(XDPoS);
     }
 }

src/Nethermind/Nethermind.Xdc/Spec/IXdcReleaseSpec.cs

@@ -0,0 +1,10 @@
+// SPDX-FileCopyrightText: 2025 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+using Nethermind.Core.Specs;
+
+namespace Nethermind.Xdc.Spec;
+
+internal interface IXdcReleaseSpec : IReleaseSpec
+{
+}

src/Nethermind/Nethermind.Xdc/Spec/XdcChainSpecEngineParameters.cs

@@ -0,0 +1,24 @@
+// SPDX-FileCopyrightText: 2025 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+using Nethermind.Core;
+using Nethermind.Int256;
+using Nethermind.Specs.ChainSpecStyle;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Nethermind.Xdc.Spec;
+internal class XdcChainSpecEngineParameters : IChainSpecEngineParameters
+{
+    public string EngineName => SealEngineType;
+    public string SealEngineType => Core.SealEngineType.XDPoS;
+    public int Epoch { get; set; }
+    public int Gap { get; set; }
+    public bool SkipV1Validation { get; set; }
+    public Address FoundationWalletAddr { get; set; }
+    public int Reward { get; set; }
+}
+

src/Nethermind/Nethermind.Xdc/Spec/XdcReleaseSpec.cs

@@ -0,0 +1,16 @@
+// SPDX-FileCopyrightText: 2025 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+using Nethermind.Specs;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Nethermind.Xdc.Spec;
+internal class XdcReleaseSpec : ReleaseSpec, IXdcReleaseSpec
+{
+    public bool IsV2Enabled { get; set; }
+
+}

src/Nethermind/Nethermind.Xdc/Spec/XdcV2ReleaseSpec.cs

@@ -0,0 +1,32 @@
+// SPDX-FileCopyrightText: 2025 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+using Nethermind.Int256;
+using Nethermind.Specs;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Nethermind.Xdc.Spec;
+internal class XdcV2ReleaseSpec : ReleaseSpec, IXdcReleaseSpec
+{
+    public int SwitchEpoch { get; set; }
+    public UInt256 SwitchBlock { get; set; }
+    public int MaxMasternodes { get; set; }          // v2 max masternodes
+    public int MaxProtectorNodes { get; set; }       // v2 max ProtectorNodes
+    public int MaxObserverNodes { get; set; }        // v2 max ObserverNodes
+    public ulong SwitchRound { get; set; }           // v1 to v2 switch block number
+    public int MinePeriod { get; set; }              // Miner mine period to mine a block
+    public int TimeoutSyncThreshold { get; set; }    // send syncInfo after number of timeout
+    public int TimeoutPeriod { get; set; }           // Duration in ms
+    public double CertThreshold { get; set; }        // Necessary number of messages from master nodes to form a certificate
+    public double MasternodeReward { get; set; }     // Block reward per master node (core validator) - unit Ether
+    public double ProtectorReward { get; set; }      // Block reward per protector - unit Ether
+    public double ObserverReward { get; set; }       // Block reward per observer - unit Ether
+    public int MinimumMinerBlockPerEpoch { get; set; }   // Minimum block per epoch for a miner to not be penalized
+    public int LimitPenaltyEpoch { get; set; }           // Epochs in a row that a penalty node needs to be penalized
+    public int MinimumSigningTx { get; set; }            // Signing txs that a node needs to produce to get out of penalty, after `LimitPenaltyEpoch`
+
+}

src/Nethermind/Nethermind.slnx

@@ -87,7 +87,6 @@
   <Project Path="Nethermind.Consensus.AuRa/Nethermind.Consensus.AuRa.csproj" />
   <Project Path="Nethermind.Consensus.Clique/Nethermind.Consensus.Clique.csproj" />
   <Project Path="Nethermind.Consensus.Ethash/Nethermind.Consensus.Ethash.csproj" />
-  <Project Path="Nethermind.Consensus.Xdc/Nethermind.Xdc.csproj" Id="a2df25a7-610f-4d9c-a0d4-95bedb7166c5" />
   <Project Path="Nethermind.Consensus/Nethermind.Consensus.csproj" />
   <Project Path="Nethermind.Core/Nethermind.Core.csproj" />
   <Project Path="Nethermind.Crypto/Nethermind.Crypto.csproj" />
@@ -130,4 +129,5 @@
   <Project Path="Nethermind.Trie/Nethermind.Trie.csproj" />
   <Project Path="Nethermind.TxPool/Nethermind.TxPool.csproj" />
   <Project Path="Nethermind.Wallet/Nethermind.Wallet.csproj" />
+  <Project Path="Nethermind.Xdc/Nethermind.Xdc.csproj" />
 </Solution>