X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2FCBlockHeader.cs;h=d56df3372466e8c6635bf3ac701e8870129c3490;hb=1f0b7fb3d5fc3969952610cebe1b173dbece722b;hp=2335e7d874c089ae989be192514703dfd477113d;hpb=c5c813f88fd93f2360d503f7165cdbcc97189459;p=NovacoinLibrary.git

diff --git a/Novacoin/CBlockHeader.cs b/Novacoin/CBlockHeader.cs
index 2335e7d..d56df33 100644
--- a/Novacoin/CBlockHeader.cs
+++ b/Novacoin/CBlockHeader.cs
@@ -1,45 +1,143 @@
-using System;
+/**
+ *  Novacoin classes library
+ *  Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using System;
+using System.Text;
 using System.Collections.Generic;
+using System.Diagnostics.Contracts;
+using System.IO;
 
 namespace Novacoin
 {
-	/// <summary>
-	/// Block header
-	/// </summary>
-	public class CBlockHeader
+    /// <summary>
+    /// Block header
+    /// </summary>
+    public class CBlockHeader
 	{
 		/// <summary>
 		/// Version of block schema.
 		/// </summary>
-		public uint nVersion = 6;
+		public uint nVersion;
 
 		/// <summary>
 		/// Previous block hash.
 		/// </summary>
-		public Hash256 prevHash = new Hash256();
+		public ScryptHash256 prevHash;
 
 		/// <summary>
 		/// Merkle root hash.
 		/// </summary>
-		public Hash256 merkleRoot = new Hash256();
+		public Hash256 merkleRoot;
 
 		/// <summary>
 		/// Block timestamp.
 		/// </summary>
-		public uint nTime = 0;
+		public uint nTime;
 
 		/// <summary>
 		/// Compressed difficulty representation.
 		/// </summary>
-		public uint nBits = 0;
+		public uint nBits;
 
 		/// <summary>
 		/// Nonce counter.
 		/// </summary>
-		public uint nNonce = 0;
+		public uint nNonce;
 
+        /// <summary>
+        /// Initialize an empty instance
+        /// </summary>
 		public CBlockHeader ()
 		{
+            nVersion = 6;
+            prevHash = new ScryptHash256();
+            merkleRoot = new Hash256();
+            nTime = Interop.GetTime();
+            nBits = 0;
+            nNonce = 0;
 		}
+
+        public CBlockHeader(CBlockHeader h)
+        {
+            nVersion = h.nVersion;
+            prevHash = new ScryptHash256(h.prevHash);
+            merkleRoot = new Hash256(h.merkleRoot);
+            nTime = h.nTime;
+            nBits = h.nBits;
+            nNonce = h.nNonce;
+        }
+
+        /// <summary>
+        /// Init block header with bytes.
+        /// </summary>
+        /// <param name="bytes">Byte array.</param>
+        public CBlockHeader(byte[] bytes)
+        {
+            Contract.Requires<ArgumentException>(bytes.Length == 80, "Any valid block header is exactly 80 bytes long.");
+
+            var stream = new MemoryStream(bytes);
+            var reader = new BinaryReader(stream);
+
+            nVersion = reader.ReadUInt32();
+            prevHash = new ScryptHash256(reader.ReadBytes(32));
+            merkleRoot = new Hash256(reader.ReadBytes(32));
+            nTime = reader.ReadUInt32();
+            nBits = reader.ReadUInt32();
+            nNonce = reader.ReadUInt32();
+
+            reader.Close();
+        }
+
+        /// <summary>
+        /// Convert current block header instance into sequence of bytes
+        /// </summary>
+        /// <returns>Byte sequence</returns>
+        public static implicit operator byte[] (CBlockHeader h)
+        {
+            var stream = new MemoryStream();
+            var writer = new BinaryWriter(stream);
+
+            writer.Write(h.nVersion);
+            writer.Write(h.prevHash);
+            writer.Write(h.merkleRoot);
+            writer.Write(h.nTime);
+            writer.Write(h.nBits);
+            writer.Write(h.nNonce);
+
+            var resultBytes = stream.ToArray();
+
+            writer.Close();
+
+            return resultBytes;
+        }
+
+        public ScryptHash256 Hash
+        {
+            get {
+                return ScryptHash256.Compute256(this);
+            }
+        }
+
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.AppendFormat("CBlockHeader(nVersion={0}, prevHash={1}, merkleRoot={2}, nTime={3}, nBits={4}, nNonce={5})", nVersion, prevHash.ToString(), merkleRoot.ToString(), nTime, nBits, nNonce);
+            return sb.ToString();
+        }
 	}
 }