*/
using System;
-using System.Linq;
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 = h.nVersion;
- prevHash = new Hash256(h.prevHash);
- merkleRoot = new Hash256(h.merkleRoot);
- nTime = h.nTime;
- nBits = h.nBits;
- nNonce = h.nNonce;
+ nVersion = header.nVersion;
+ prevHash = header.prevHash;
+ merkleRoot = header.merkleRoot;
+ nTime = header.nTime;
+ nBits = header.nBits;
+ nNonce = header.nNonce;
}
+ internal CBlockHeader(ref BinaryReader reader)
+ {
+ 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, 4);
- merkleRoot = new Hash256(bytes, 36);
- 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)
{
- get
- {
- var 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;
- }
+ 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 ScryptHash256 Hash
+ public uint256 Hash
{
get {
- return ScryptHash256.Compute256(Bytes);
+ return CryptoUtils.ComputeScryptHash256(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);
+ sb.AppendFormat("CBlockHeader(nVersion={0}, prevHash={1}, merkleRoot={2}, nTime={3}, nBits={4}, nNonce={5})", nVersion, prevHash, merkleRoot, nTime, nBits, nNonce);
return sb.ToString();
}
}