Novacoin/CBlockHeader.cs

   1 \feff/**
   2  *  Novacoin classes library
   3  *  Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
   4
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU Affero General Public License as
   7  *  published by the Free Software Foundation, either version 3 of the
   8  *  License, or (at your option) any later version.
   9
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU Affero General Public License for more details.
  14
  15  *  You should have received a copy of the GNU Affero General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 using System;
  20 using System.Text;
  21 using System.Collections.Generic;
  22 using System.Diagnostics.Contracts;
  23
  24 namespace Novacoin
  25 {
  26     /// <summary>
  27     /// Block header
  28     /// </summary>
  29     public class CBlockHeader
  30         {
  31                 /// <summary>
  32                 /// Version of block schema.
  33                 /// </summary>
  34                 public uint nVersion = 6;
  35
  36                 /// <summary>
  37                 /// Previous block hash.
  38                 /// </summary>
  39                 public Hash256 prevHash = new Hash256();
  40
  41                 /// <summary>
  42                 /// Merkle root hash.
  43                 /// </summary>
  44                 public Hash256 merkleRoot = new Hash256();
  45
  46                 /// <summary>
  47                 /// Block timestamp.
  48                 /// </summary>
  49                 public uint nTime = 0;
  50
  51                 /// <summary>
  52                 /// Compressed difficulty representation.
  53                 /// </summary>
  54                 public uint nBits = 0;
  55
  56                 /// <summary>
  57                 /// Nonce counter.
  58                 /// </summary>
  59                 public uint nNonce = 0;
  60
  61         /// <summary>
  62         /// Initialize an empty instance
  63         /// </summary>
  64                 public CBlockHeader ()
  65                 {
  66                 }
  67
  68         public CBlockHeader(CBlockHeader h)
  69         {
  70             nVersion = h.nVersion;
  71             prevHash = new Hash256(h.prevHash);
  72             merkleRoot = new Hash256(h.merkleRoot);
  73             nTime = h.nTime;
  74             nBits = h.nBits;
  75             nNonce = h.nNonce;
  76         }
  77
  78         public CBlockHeader(byte[] bytes)
  79         {
  80             Contract.Requires<ArgumentException>(bytes.Length == 80, "Any valid block header is exactly 80 bytes long.");
  81
  82             nVersion = BitConverter.ToUInt32(bytes, 0);
  83             prevHash = new Hash256(bytes, 4);
  84             merkleRoot = new Hash256(bytes, 36);
  85             nTime = BitConverter.ToUInt32(bytes, 68);
  86             nBits = BitConverter.ToUInt32(bytes, 72);
  87             nNonce = BitConverter.ToUInt32(bytes, 76);
  88         }
  89
  90         /// <summary>
  91         /// Convert current block header instance into sequence of bytes
  92         /// </summary>
  93         /// <returns>Byte sequence</returns>
  94         public static implicit operator byte[] (CBlockHeader h)
  95         {
  96             var r = new List<byte>();
  97
  98             r.AddRange(BitConverter.GetBytes(h.nVersion));
  99             r.AddRange((byte[])h.prevHash);
 100             r.AddRange((byte[])h.merkleRoot);
 101             r.AddRange(BitConverter.GetBytes(h.nTime));
 102             r.AddRange(BitConverter.GetBytes(h.nBits));
 103             r.AddRange(BitConverter.GetBytes(h.nNonce));
 104
 105             return r.ToArray();
 106         }
 107
 108         public ScryptHash256 Hash
 109         {
 110             get {
 111                 return ScryptHash256.Compute256(this);
 112             }
 113         }
 114
 115         public override string ToString()
 116         {
 117             var sb = new StringBuilder();
 118             sb.AppendFormat("CBlockHeader(nVersion={0}, prevHash={1}, merkleRoot={2}, nTime={3}, nBits={4}, nNonce={5})", nVersion, prevHash.ToString(), merkleRoot.ToString(), nTime, nBits, nNonce);
 119             return sb.ToString();
 120         }
 121         }
 122 }