-\feffusing System;
+\feff/**
+ * 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.Linq;
+using System.Text;
+using System.Collections.Generic;
+using System.Security.Cryptography;
namespace Novacoin
{
/// <summary>
/// Transactions array.
/// </summary>
- public CTransaction[] tx;
+ public CTransaction[] vtx;
- /// <summary>
- /// Block header signature.
- /// </summary>
- public byte[] signature = {};
+ /// <summary>
+ /// Block header signature.
+ /// </summary>
+ public byte[] signature = new byte[0];
+
+ public CBlock(CBlock b)
+ {
+ header = new CBlockHeader(b.header);
+
+ for (int i = 0; i < b.vtx.Length; i++)
+ {
+ vtx[i] = new CTransaction(b.vtx[i]);
+ }
- public CBlock ()
+ b.signature.CopyTo(signature, 0);
+ }
+
+ /// <summary>
+ /// Parse byte sequence and initialize new block instance
+ /// </summary>
+ /// <param name="blockBytes"></param>
+ public CBlock (byte[] blockBytes)
{
+ ByteQueue wBytes = new ByteQueue(blockBytes);
+
+ // Fill the block header fields
+ header = new CBlockHeader(wBytes.Get(80));
+
+ // Parse transactions list
+ vtx = CTransaction.ReadTransactionsList(ref wBytes);
+
+ // Read block signature
+ signature = wBytes.Get((int)wBytes.GetVarInt());
}
+
+ public CBlock()
+ {
+ // Initialize empty array of transactions. Please note that such
+ // configuration is not valid real block since it has to provide
+ // at least one transaction.
+ vtx = new CTransaction[0];
+ }
+
+ /// <summary>
+ /// Is this a Proof-of-Stake block?
+ /// </summary>
+ public bool IsProofOfStake
+ {
+ get
+ {
+ return (vtx.Length > 1 && vtx[1].IsCoinStake);
+ }
+ }
+
+ /// <summary>
+ /// Was this signed correctly?
+ /// </summary>
+ public bool SignatureOK
+ {
+ get
+ {
+ if (IsProofOfStake)
+ {
+ if (signature.Length == 0)
+ {
+ return false; // No signature
+ }
+
+ txnouttype whichType;
+ IList<byte[]> solutions;
+
+ if (!ScriptCode.Solver(vtx[1].vout[1].scriptPubKey, out whichType, out solutions))
+ {
+ return false; // No solutions found
+ }
+
+ if (whichType == txnouttype.TX_PUBKEY)
+ {
+ CPubKey pubkey;
+
+ try
+ {
+ pubkey = new CPubKey(solutions[0]);
+ }
+ catch (Exception)
+ {
+ return false; // Error while loading public key
+ }
+
+ return pubkey.VerifySignature(header.Hash, signature);
+ }
+ }
+ else
+ {
+ // Proof-of-Work blocks have no signature
+
+ return true;
+ }
+
+ return false;
+ }
+ }
+
+ /// <summary>
+ /// Get instance as sequence of bytes
+ /// </summary>
+ /// <returns>Byte sequence</returns>
+ public static implicit operator byte[] (CBlock b)
+ {
+ var r = new List<byte>();
+
+ r.AddRange((byte[])b.header);
+ r.AddRange(VarInt.EncodeVarInt(b.vtx.LongLength)); // transactions count
+
+ foreach (var tx in b.vtx)
+ {
+ r.AddRange((byte[])tx);
+ }
+
+ r.AddRange(VarInt.EncodeVarInt(b.signature.LongLength));
+ r.AddRange(b.signature);
+
+ return r.ToArray();
+ }
+
+ /// <summary>
+ /// Merkle root
+ /// </summary>
+ public Hash256 hashMerkleRoot
+ {
+ get {
+
+ var merkleTree = new List<byte>();
+
+ foreach (var tx in vtx)
+ {
+ merkleTree.AddRange(Hash256.ComputeRaw256(tx));
+ }
+
+ int levelOffset = 0;
+ for (int nLevelSize = vtx.Length; nLevelSize > 1; nLevelSize = (nLevelSize + 1) / 2)
+ {
+ for (int nLeft = 0; nLeft < nLevelSize; nLeft += 2)
+ {
+ int nRight = Math.Min(nLeft + 1, nLevelSize - 1);
+
+ var left = merkleTree.GetRange((levelOffset + nLeft) * 32, 32).ToArray();
+ var right = merkleTree.GetRange((levelOffset + nRight) * 32, 32).ToArray();
+
+ merkleTree.AddRange(Hash256.ComputeRaw256(ref left, ref right));
+ }
+ levelOffset += nLevelSize;
+ }
+
+ return (merkleTree.Count == 0) ? new Hash256() : new Hash256(merkleTree.GetRange(merkleTree.Count-32, 32).ToArray());
+ }
+ }
+
+ public override string ToString()
+ {
+ var sb = new StringBuilder();
+
+ sb.AppendFormat("CBlock(\n header={0},\n", header.ToString());
+
+ foreach(var tx in vtx)
+ {
+ sb.AppendFormat("{0}", tx.ToString());
+ }
+
+ if (IsProofOfStake)
+ {
+ sb.AppendFormat(", signature={0}, signatureOK={1}\n", Interop.ToHex(signature), SignatureOK);
+ }
+
+ sb.Append(")");
+
+ return sb.ToString();
+ }
}
}
git://git.novaco.in / NovacoinLibrary.git / blobdiff