X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2FCBlockHeader.cs;h=09cbd1ba7e7eba8c545bd6dfc7a2aa936ffaa91d;hb=1dcac5faa2b1477034f82466ffb16170fa2e9bb6;hp=8c07cf229f7fdd51f67c0137cec4ab3cddd8a971;hpb=9f4f9d3f60f89dcf29fb7b24d60ffd40d7360a7d;p=NovacoinLibrary.git

diff --git a/Novacoin/CBlockHeader.cs b/Novacoin/CBlockHeader.cs
index 8c07cf2..09cbd1b 100644
--- a/Novacoin/CBlockHeader.cs
+++ b/Novacoin/CBlockHeader.cs
@@ -1,97 +1,152 @@
-using System;
-using System.Linq;
+/**
+ *  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 uint256 prevHash;
 
 		/// <summary>
 		/// Merkle root hash.
 		/// </summary>
-		public Hash256 merkleRoot = new Hash256();
+		public uint256 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 uint256();
+            merkleRoot = new uint256();
+            nTime = Interop.GetTime();
+            nBits = 0;
+            nNonce = 0;
 		}
 
-        public CBlockHeader(CBlockHeader h)
+        public CBlockHeader(CBlockHeader header)
+        {
+            nVersion = header.nVersion;
+            prevHash = header.prevHash;
+            merkleRoot = header.merkleRoot;
+            nTime = header.nTime;
+            nBits = header.nBits;
+            nNonce = header.nNonce;
+        }
+
+        internal CBlockHeader(ref BinaryReader reader)
         {
-            nVersion = h.nVersion;
-            prevHash = new Hash256(h.prevHash);
-            merkleRoot = new Hash256(h.merkleRoot);
-            nTime = h.nTime;
-            nBits = h.nBits;
-            nNonce = h.nNonce;
+            nVersion = reader.ReadUInt32();
+            prevHash = reader.ReadBytes(32);
+            merkleRoot = reader.ReadBytes(32);
+            nTime = reader.ReadUInt32();
+            nBits = reader.ReadUInt32();
+            nNonce = reader.ReadUInt32();
         }
 
+        /// <summary>
+        /// Init block header with bytes.
+        /// </summary>
+        /// <param name="bytes">Byte array.</param>
         public CBlockHeader(byte[] bytes)
         {
-            nVersion = BitConverter.ToUInt32(bytes, 0);
-            prevHash = new Hash256(bytes.Skip(4).Take(32).ToArray());
-            merkleRoot = new Hash256(bytes.Skip(36).Take(32).ToArray());
-            nTime = BitConverter.ToUInt32(bytes, 68);
-            nBits = BitConverter.ToUInt32(bytes, 72);
-            nNonce = BitConverter.ToUInt32(bytes, 76);
+            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 = reader.ReadBytes(32);
+            merkleRoot = 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 IList<byte> Bytes
+        public static implicit operator byte[] (CBlockHeader header)
+        {
+            var stream = new MemoryStream();
+            var writer = new BinaryWriter(stream);
+
+            writer.Write(header.nVersion);
+            writer.Write(header.prevHash);
+            writer.Write(header.merkleRoot);
+            writer.Write(header.nTime);
+            writer.Write(header.nBits);
+            writer.Write(header.nNonce);
+
+            var resultBytes = stream.ToArray();
+
+            writer.Close();
+
+            return resultBytes;
+        }
+
+        public uint256 Hash
         {
-            get
-            {
-                List<byte> r = new List<byte>();
-
-                r.AddRange(BitConverter.GetBytes(nVersion));
-                r.AddRange(prevHash.hashBytes);
-                r.AddRange(merkleRoot.hashBytes);
-                r.AddRange(BitConverter.GetBytes(nTime));
-                r.AddRange(BitConverter.GetBytes(nBits));
-                r.AddRange(BitConverter.GetBytes(nNonce));
-
-                return r;
+            get {
+                return CryptoUtils.ComputeScryptHash256(this);
             }
         }
 
         public override string ToString()
         {
-            StringBuilder 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);
+            var sb = new StringBuilder();
+            sb.AppendFormat("CBlockHeader(nVersion={0}, prevHash={1}, merkleRoot={2}, nTime={3}, nBits={4}, nNonce={5})", nVersion, prevHash, merkleRoot, nTime, nBits, nNonce);
             return sb.ToString();
         }
 	}