\feffusing System;
using System.IO;
using System.Linq;
-using System.Collections.Generic;
+using System.Collections.Concurrent;
using SQLite.Net;
using SQLite.Net.Attributes;
using SQLite.Net.Interop;
using SQLite.Net.Platform.Generic;
+using SQLiteNetExtensions.Attributes;
+
namespace Novacoin
{
- public enum BlockType
- {
- PROOF_OF_WORK,
- PROOF_OF_WORK_MODIFIER,
- PROOF_OF_STAKE,
- PROOF_OF_STAKE_MODIFIER
- };
-
+ /// <summary>
+ /// Block headers table
+ /// </summary>
[Table("BlockStorage")]
class CBlockStoreItem
{
public byte[] Hash { get; set; }
/// <summary>
- /// Next block hash
+ /// Version of block schema
/// </summary>
- public byte[] NextHash { get; set; }
+ public uint nVersion { get; set; }
+
+ /// <summary>
+ /// Previous block hash.
+ /// </summary>
+ public byte[] prevHash { get; set; }
+
+ /// <summary>
+ /// Merkle root hash.
+ /// </summary>
+ public byte[] merkleRoot { get; set; }
+
+ /// <summary>
+ /// Block timestamp.
+ /// </summary>
+ public uint nTime { get; set; }
/// <summary>
- /// Serialized representation of block header
+ /// Compressed difficulty representation.
/// </summary>
- public byte[] BlockHeader { get; set; }
+ public uint nBits { get; set; }
+
+ /// <summary>
+ /// Nonce counter.
+ /// </summary>
+ public uint nNonce { get; set; }
/// <summary>
/// Block type flags
public BlockType BlockTypeFlag { get; set; }
/// <summary>
+ /// Next block hash
+ /// </summary>
+ public byte[] NextHash { get; set; }
+
+ /// <summary>
/// Block position in file
/// </summary>
public long nBlockPos { get; set; }
/// Block size in bytes
/// </summary>
public int nBlockSize { get; set; }
+
+ /// <summary>
+ /// Fill database item with data from given block header.
+ /// </summary>
+ /// <param name="header">Block header</param>
+ /// <returns>Header hash</returns>
+ public ScryptHash256 FillHeader(CBlockHeader header)
+ {
+ ScryptHash256 _hash;
+ Hash = _hash = header.Hash;
+
+ nVersion = header.nVersion;
+ prevHash = header.prevHash;
+ merkleRoot = header.merkleRoot;
+ nTime = header.nTime;
+ nBits = header.nBits;
+ nNonce = header.nNonce;
+
+ return _hash;
+ }
+
+ /// <summary>
+ /// Reconstruct block header from item data.
+ /// </summary>
+ public CBlockHeader BlockHeader
+ {
+ get
+ {
+ CBlockHeader header = new CBlockHeader();
+
+ header.nVersion = nVersion;
+ header.prevHash = new Hash256(prevHash);
+ header.merkleRoot = new Hash256(merkleRoot);
+ header.nTime = nTime;
+ header.nBits = nBits;
+ header.nNonce = nNonce;
+
+ return header;
+ }
+ }
+
+ /// <summary>
+ /// Read block from file.
+ /// </summary>
+ /// <param name="reader">Stream with read access.</param>
+ /// <param name="reader">CBlock reference.</param>
+ /// <returns>Result</returns>
+ public bool ReadFromFile(ref Stream reader, out CBlock block)
+ {
+ var buffer = new byte[nBlockSize];
+ block = null;
+
+ try
+ {
+ reader.Seek(nBlockPos, SeekOrigin.Begin);
+
+ if (nBlockSize != reader.Read(buffer, 0, nBlockSize))
+ {
+ return false;
+ }
+
+ block = new CBlock(buffer);
+
+ return true;
+ }
+ catch (IOException)
+ {
+ // I/O error
+ return false;
+ }
+ catch (BlockConstructorException)
+ {
+ // Constructor exception
+ return false;
+ }
+ }
+ }
+
+ /// <summary>
+ /// Block type.
+ /// </summary>
+ public enum BlockType
+ {
+ PROOF_OF_WORK,
+ PROOF_OF_WORK_MODIFIER,
+ PROOF_OF_STAKE,
+ PROOF_OF_STAKE_MODIFIER
+ };
+
+ /// <summary>
+ /// Transaction type.
+ /// </summary>
+ public enum TxType
+ {
+ TX_COINBASE,
+ TX_COINSTAKE,
+ TX_USER
+ }
+
+ [Table("TransactionStorage")]
+ public class CTransactionStoreItem
+ {
+ /// <summary>
+ /// Transaction hash
+ /// </summary>
+ [PrimaryKey]
+ public byte[] TransactionHash { get; set; }
+
+ /// <summary>
+ /// Block hash
+ /// </summary>
+ [ForeignKey(typeof(CBlockStoreItem), Name = "Hash")]
+ public byte[] BlockHash { get; set; }
+
+ /// <summary>
+ /// Transaction type flag
+ /// </summary>
+ public TxType txType { get; set; }
+
+ /// <summary>
+ /// Tx position in file
+ /// </summary>
+ public long nTxPos { get; set; }
+
+ /// <summary>
+ /// Transaction size
+ /// </summary>
+ public int nTxSize { get; set; }
+
+ /// <summary>
+ /// Read transaction from file.
+ /// </summary>
+ /// <param name="reader">Stream with read access.</param>
+ /// <param name="tx">CTransaction reference.</param>
+ /// <returns>Result</returns>
+ public bool ReadFromFile(ref Stream reader, out CTransaction tx)
+ {
+ var buffer = new byte[250000]; // Max transaction size is 250kB
+ tx = null;
+
+ try
+ {
+ reader.Seek(nTxPos, SeekOrigin.Begin); // Seek to transaction offset
+
+ if (nTxSize != reader.Read(buffer, 0, nTxSize))
+ {
+ return false;
+ }
+
+ tx = new CTransaction(buffer);
+
+ return true;
+ }
+ catch (IOException)
+ {
+ // I/O error
+ return false;
+ }
+ catch (TransactionConstructorException)
+ {
+ // Constructor error
+ return false;
+ }
+ }
}
/// <summary>
private bool disposed = false;
private object LockObj = new object();
private SQLiteConnection dbConn = null;
+ private string strBlockFile;
+
+ private ConcurrentDictionary<ScryptHash256, CChainNode> blockMap = new ConcurrentDictionary<ScryptHash256, CChainNode>();
+ private ConcurrentDictionary<Hash256, CTransactionStoreItem> txMap = new ConcurrentDictionary<Hash256, CTransactionStoreItem>();
+ private CBlock genesisBlock = new CBlock(Interop.HexToArray("0100000000000000000000000000000000000000000000000000000000000000000000007b0502ad2f9f675528183f83d6385794fbcaa914e6d385c6cb1d866a3b3bb34c398e1151ffff0f1ed30918000101000000398e1151010000000000000000000000000000000000000000000000000000000000000000ffffffff4d04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936ffffffff010000000000000000000000000000"));
+
+ public static CBlockStore Instance;
+
+ /// <summary>
+ /// Block file stream
+ /// </summary>
+ private Stream reader;
- private Dictionary<ScryptHash256, CChainNode> blockMap = new Dictionary<ScryptHash256, CChainNode>();
-
/// <summary>
/// Init the block storage manager.
/// </summary>
/// <param name="IndexDB">Path to index database</param>
/// <param name="BlockFile">Path to block file</param>
- public CBlockStore(string IndexDB = "blockstore.dat", string BlockFile = "blk0001.dat")
+ public CBlockStore(string IndexDB = "blockstore.dat", string BlockFile = "bootstrap.dat")
{
+ strBlockFile = BlockFile;
+
bool firstInit = !File.Exists(IndexDB);
dbConn = new SQLiteConnection(new SQLitePlatformGeneric(), IndexDB);
{
lock (LockObj)
{
+ // Create tables
dbConn.CreateTable<CBlockStoreItem>(CreateFlags.AutoIncPK);
+ dbConn.CreateTable<CTransactionStoreItem>(CreateFlags.ImplicitPK);
+
+ // Init store with genesis block
+
+ var NewBlockItem = new CBlockStoreItem()
+ {
+ BlockTypeFlag = genesisBlock.IsProofOfStake ? BlockType.PROOF_OF_STAKE : BlockType.PROOF_OF_WORK,
+ nBlockPos = 8,
+ nBlockSize = ((byte[])genesisBlock).Length
+ };
+
+ var HeaderHash = NewBlockItem.FillHeader(genesisBlock.header);
+ var NewNode = new CChainNode() { blockHeader = genesisBlock.header, blockType = BlockType.PROOF_OF_WORK };
+
+ blockMap.TryAdd(HeaderHash, NewNode);
+ dbConn.Insert(NewBlockItem);
+
+ var NewTxItem = new CTransactionStoreItem()
+ {
+ TransactionHash = genesisBlock.vtx[0].Hash,
+ BlockHash = HeaderHash,
+ txType = TxType.TX_COINBASE,
+ nTxPos = 8 + genesisBlock.GetTxOffset(0),
+ nTxSize = genesisBlock.vtx[0].Size
+ };
+
+ dbConn.Insert(NewTxItem);
}
}
else
{
var QueryGet = dbConn.Query<CBlockStoreItem>("select * from [BlockStorage] order by [ItemId] asc");
- foreach (CBlockStoreItem si in QueryGet)
+ // Init list of block items
+ foreach (var storeItem in QueryGet)
{
- blockMap.Add(
- new ScryptHash256(si.Hash),
- new CChainNode()
- {
- blockHeader = new CBlockHeader(si.BlockHeader),
- blockType = si.BlockTypeFlag
- });
+ var currentNode = new CChainNode() { blockHeader = new CBlockHeader(storeItem.BlockHeader), blockType = storeItem.BlockTypeFlag };
+ blockMap.TryAdd(new ScryptHash256(storeItem.Hash), currentNode);
}
}
+
+ var fStream1 = File.OpenRead(strBlockFile);
+ reader = new BinaryReader(fStream1).BaseStream;
+
+ Instance = this;
+
+ }
+
+ public bool GetTransaction(Hash256 TxID, ref CTransaction tx)
+ {
+ var QueryTx = dbConn.Query<CTransactionStoreItem>("select * from [TransactionStorage] where [TransactionHash] = ?", (byte[])TxID);
+
+ if (QueryTx.Count == 1)
+ {
+ return QueryTx[0].ReadFromFile(ref reader, out tx);
+ }
+
+ // Tx not found
+
+ return false;
+ }
+
+ public bool GetBlock(ScryptHash256 blockHash, ref CBlock block)
+ {
+ var QueryBlock = dbConn.Query<CBlockStoreItem>("select * from [BlockStorage] where [Hash] = ?", (byte[])blockHash);
+
+ if (QueryBlock.Count == 1)
+ {
+ return QueryBlock[0].ReadFromFile(ref reader, out block);
+ }
+
+ // Block not found
+
+ return false;
}
public bool ParseBlockFile(string BlockFile = "bootstrap.dat")
{
+ strBlockFile = BlockFile;
+
// TODO: Rewrite completely.
var QueryGet = dbConn.Query<CBlockStoreItem>("select * from [BlockStorage] order by [ItemId] desc limit 1");
nOffset = res.nBlockPos + res.nBlockSize;
}
- var fileReader = new BinaryReader(File.OpenRead(BlockFile));
- var fileStream = fileReader.BaseStream;
-
var buffer = new byte[1000000]; // Max block size is 1Mb
var intBuffer = new byte[4];
- fileStream.Seek(nOffset, SeekOrigin.Begin); // Seek to previous offset + previous block length
+ var fStream2 = File.OpenRead(strBlockFile);
+ var readerForBlocks = new BinaryReader(fStream2).BaseStream;
+
+ readerForBlocks.Seek(nOffset, SeekOrigin.Begin); // Seek to previous offset + previous block length
dbConn.BeginTransaction();
- while (fileStream.Read(buffer, 0, 4) == 4) // Read magic number
+ while (readerForBlocks.Read(buffer, 0, 4) == 4) // Read magic number
{
var nMagic = BitConverter.ToUInt32(buffer, 0);
if (nMagic != 0xe5e9e8e4)
{
- Console.WriteLine("Incorrect magic number.");
- break;
+ throw new Exception("Incorrect magic number.");
}
- var nBytesRead = fileStream.Read(buffer, 0, 4);
+ var nBytesRead = readerForBlocks.Read(buffer, 0, 4);
if (nBytesRead != 4)
{
- Console.WriteLine("BLKSZ EOF");
- break;
+ throw new Exception("BLKSZ EOF");
}
var nBlockSize = BitConverter.ToInt32(buffer, 0);
- nOffset = fileStream.Position;
+ nOffset = readerForBlocks.Position;
- nBytesRead = fileStream.Read(buffer, 0, nBlockSize);
+ nBytesRead = readerForBlocks.Read(buffer, 0, nBlockSize);
if (nBytesRead == 0 || nBytesRead != nBlockSize)
{
- Console.WriteLine("BLK EOF");
- break;
+ throw new Exception("BLK EOF");
}
var block = new CBlock(buffer);
- var headerHash = block.header.Hash;
- if (nOffset % 1000 == 0) // Commit on each 1000th block
+ if (block.header.merkleRoot != block.hashMerkleRoot)
{
- Console.WriteLine("Offset={0}, Hash: {1}", nOffset, headerHash);
- dbConn.Commit();
- dbConn.BeginTransaction();
+ Console.WriteLine("MerkleRoot mismatch: {0} vs. {1} in block {2}.", block.header.merkleRoot, block.hashMerkleRoot, block.header.Hash);
+ continue;
}
- if (blockMap.ContainsKey(headerHash))
+ if (block.IsProofOfStake && !block.SignatureOK)
{
- Console.WriteLine("Duplicate block {0}", headerHash);
+ Console.WriteLine("Proof-of-Stake signature is invalid for block {0}.", block.header.Hash);
continue;
}
- blockMap.Add(
- headerHash,
- new CChainNode() {
- blockHeader = block.header,
- blockType = block.IsProofOfStake ? BlockType.PROOF_OF_STAKE : BlockType.PROOF_OF_WORK
- });
-
- var result = dbConn.Insert(new CBlockStoreItem()
+ var NewStoreItem = new CBlockStoreItem()
{
- Hash = headerHash,
- BlockHeader = block.header,
BlockTypeFlag = block.IsProofOfStake ? BlockType.PROOF_OF_STAKE : BlockType.PROOF_OF_WORK,
nBlockPos = nOffset,
nBlockSize = nBlockSize
- });
+ };
+
+ var NewChainNode = new CChainNode()
+ {
+ blockHeader = block.header,
+ blockType = NewStoreItem.BlockTypeFlag
+ };
+
+ var HeaderHash = NewStoreItem.FillHeader(block.header);
+
+ int nCount = blockMap.Count;
+ Console.WriteLine("nCount={0}, Hash={1}, Time={2}", nCount, HeaderHash, DateTime.Now); // Commit on each 100th block
+
+ if (nCount % 100 == 0)
+ {
+ Console.WriteLine("Commit...");
+ dbConn.Commit();
+ dbConn.BeginTransaction();
+ }
+
+ if (!blockMap.TryAdd(HeaderHash, NewChainNode))
+ {
+ Console.WriteLine("Duplicate block: {0}", HeaderHash);
+ continue;
+ }
+
+ // Verify transactions
+
+ foreach (var tx in block.vtx)
+ {
+ if (!tx.VerifyScripts())
+ {
+ Console.WriteLine("Error checking tx {0}", tx.Hash);
+ continue;
+ }
+ }
+
+ dbConn.Insert(NewStoreItem);
+
+ for (int i = 0; i < block.vtx.Length; i++)
+ {
+ // Handle trasactions
+
+ var nTxOffset = nOffset + block.GetTxOffset(i);
+ TxType txnType = TxType.TX_USER;
+
+ if (block.vtx[i].IsCoinBase)
+ {
+ txnType = TxType.TX_COINBASE;
+ }
+ else if (block.vtx[i].IsCoinStake)
+ {
+ txnType = TxType.TX_COINSTAKE;
+ }
+
+ var NewTxItem = new CTransactionStoreItem()
+ {
+ TransactionHash = block.vtx[i].Hash,
+ BlockHash = HeaderHash,
+ nTxPos = nTxOffset,
+ nTxSize = block.vtx[i].Size,
+ txType = txnType
+ };
+
+ dbConn.Insert(NewTxItem);
+ }
}
dbConn.Commit();
-
- fileReader.Dispose();
return true;
}
if (disposing)
{
// Free other state (managed objects).
+
+ reader.Dispose();
}
if (dbConn != null)
namespace Novacoin
{
+ [Serializable]
+ public class TransactionConstructorException : Exception
+ {
+ public TransactionConstructorException()
+ {
+ }
+
+ public TransactionConstructorException(string message)
+ : base(message)
+ {
+ }
+
+ public TransactionConstructorException(string message, Exception inner)
+ : base(message, inner)
+ {
+ }
+ }
+
/// <summary>
/// Represents the transaction. Any transaction must provide one input and one output at least.
/// </summary>
nLockTime = tx.nLockTime;
}
+ public bool VerifyScripts()
+ {
+ if (IsCoinBase)
+ {
+ return true;
+ }
+
+ CTransaction txPrev = null;
+ for (int i = 0; i < vin.Length; i++)
+ {
+ var outpoint = vin[i].prevout;
+
+ if (!CBlockStore.Instance.GetTransaction(outpoint.hash, ref txPrev))
+ return false;
+
+ if (!ScriptCode.VerifyScript(vin[i].scriptSig, txPrev.vout[outpoint.n].scriptPubKey, this, i, (int)scriptflag.SCRIPT_VERIFY_P2SH, 0))
+ return false;
+ }
+
+ return true;
+ }
/// <summary>
/// Parse byte sequence and initialize new instance of CTransaction
/// <param name="txBytes">Byte sequence</param>
public CTransaction(byte[] txBytes)
{
- var wBytes = new ByteQueue(txBytes);
+ try
+ {
+ var wBytes = new ByteQueue(txBytes);
- nVersion = BitConverter.ToUInt32(wBytes.Get(4), 0);
- nTime = BitConverter.ToUInt32(wBytes.Get(4), 0);
+ nVersion = BitConverter.ToUInt32(wBytes.Get(4), 0);
+ nTime = BitConverter.ToUInt32(wBytes.Get(4), 0);
- int nInputs = (int)wBytes.GetVarInt();
- vin = new CTxIn[nInputs];
+ int nInputs = (int)wBytes.GetVarInt();
+ vin = new CTxIn[nInputs];
- for (int nCurrentInput = 0; nCurrentInput < nInputs; nCurrentInput++)
- {
- // Fill inputs array
- vin[nCurrentInput] = new CTxIn();
-
- vin[nCurrentInput].prevout = new COutPoint(wBytes.Get(36));
+ for (int nCurrentInput = 0; nCurrentInput < nInputs; nCurrentInput++)
+ {
+ // Fill inputs array
+ vin[nCurrentInput] = new CTxIn();
- int nScriptSigLen = (int)wBytes.GetVarInt();
- vin[nCurrentInput].scriptSig = new CScript(wBytes.Get(nScriptSigLen));
+ vin[nCurrentInput].prevout = new COutPoint(wBytes.Get(36));
- vin[nCurrentInput].nSequence = BitConverter.ToUInt32(wBytes.Get(4), 0);
- }
+ int nScriptSigLen = (int)wBytes.GetVarInt();
+ vin[nCurrentInput].scriptSig = new CScript(wBytes.Get(nScriptSigLen));
- int nOutputs = (int)wBytes.GetVarInt();
- vout = new CTxOut[nOutputs];
+ vin[nCurrentInput].nSequence = BitConverter.ToUInt32(wBytes.Get(4), 0);
+ }
- for (int nCurrentOutput = 0; nCurrentOutput < nOutputs; nCurrentOutput++)
- {
- // Fill outputs array
- vout[nCurrentOutput] = new CTxOut();
- vout[nCurrentOutput].nValue = BitConverter.ToInt64(wBytes.Get(8), 0);
+ int nOutputs = (int)wBytes.GetVarInt();
+ vout = new CTxOut[nOutputs];
- int nScriptPKLen = (int)wBytes.GetVarInt();
- vout[nCurrentOutput].scriptPubKey = new CScript(wBytes.Get(nScriptPKLen));
- }
+ for (int nCurrentOutput = 0; nCurrentOutput < nOutputs; nCurrentOutput++)
+ {
+ // Fill outputs array
+ vout[nCurrentOutput] = new CTxOut();
+ vout[nCurrentOutput].nValue = BitConverter.ToUInt64(wBytes.Get(8), 0);
+
+ int nScriptPKLen = (int)wBytes.GetVarInt();
+ vout[nCurrentOutput].scriptPubKey = new CScript(wBytes.Get(nScriptPKLen));
+ }
- nLockTime = BitConverter.ToUInt32(wBytes.Get(4), 0);
+ nLockTime = BitConverter.ToUInt32(wBytes.Get(4), 0);
+ }
+ catch (Exception e)
+ {
+ throw new TransactionConstructorException("Deserialization failed", e);
+ }
}
/// <summary>
/// <returns>Transactions array</returns>
public static CTransaction[] ReadTransactionsList(ref ByteQueue wTxBytes)
{
- // Read amount of transactions
- int nTransactions = (int)wTxBytes.GetVarInt();
- var tx = new CTransaction[nTransactions];
-
- for (int nTx = 0; nTx < nTransactions; nTx++)
+ try
{
- // Fill the transactions array
- tx[nTx] = new CTransaction();
+ // Read amount of transactions
+ int nTransactions = (int)wTxBytes.GetVarInt();
+ var tx = new CTransaction[nTransactions];
- tx[nTx].nVersion = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
- tx[nTx].nTime = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
+ for (int nTx = 0; nTx < nTransactions; nTx++)
+ {
+ // Fill the transactions array
+ tx[nTx] = new CTransaction();
- // Inputs array
- tx[nTx].vin = CTxIn.ReadTxInList(ref wTxBytes);
+ tx[nTx].nVersion = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
+ tx[nTx].nTime = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
- // outputs array
- tx[nTx].vout = CTxOut.ReadTxOutList(ref wTxBytes);
+ // Inputs array
+ tx[nTx].vin = CTxIn.ReadTxInList(ref wTxBytes);
- tx[nTx].nLockTime = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
- }
+ // outputs array
+ tx[nTx].vout = CTxOut.ReadTxOutList(ref wTxBytes);
+
+ tx[nTx].nLockTime = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
+ }
+
+ return tx;
- return tx;
+ }
+ catch (Exception e)
+ {
+ throw new TransactionConstructorException("Deserealization failed", e);
+ }
}
public bool IsCoinBase
git://git.novaco.in / NovacoinLibrary.git / commitdiff