using System;
using System.IO;
-using System.Linq;
using System.Collections.Concurrent;
using SQLite.Net;
-using SQLite.Net.Attributes;
using SQLite.Net.Interop;
using SQLite.Net.Platform.Generic;
-using SQLiteNetExtensions.Attributes;
using System.Collections.Generic;
+using System.Text;
namespace Novacoin
{
- /// <summary>
- /// Block headers table
- /// </summary>
- [Table("BlockStorage")]
- public class CBlockStoreItem
+ public class CBlockStore : IDisposable
{
- /// <summary>
- /// Item ID in the database
- /// </summary>
- [PrimaryKey, AutoIncrement]
- public int ItemID { get; set; }
+ public const uint nMagicNumber = 0xe5e9e8e4;
- /// <summary>
- /// PBKDF2+Salsa20 of block hash
- /// </summary>
- [Unique]
- public byte[] Hash { get; set; }
+ private bool disposed = false;
+ private object LockObj = new object();
/// <summary>
- /// Version of block schema
+ /// SQLite connection object.
/// </summary>
- public uint nVersion { get; set; }
+ private SQLiteConnection dbConn;
/// <summary>
- /// Previous block hash.
+ /// Current SQLite platform
/// </summary>
- public byte[] prevHash { get; set; }
+ private ISQLitePlatform dbPlatform;
/// <summary>
- /// Merkle root hash.
+ /// Block file.
/// </summary>
- public byte[] merkleRoot { get; set; }
+ private string strBlockFile;
/// <summary>
- /// Block timestamp.
+ /// Index database file.
/// </summary>
- public uint nTime { get; set; }
+ private string strDbFile;
/// <summary>
- /// Compressed difficulty representation.
+ /// Map of block tree nodes.
+ ///
+ /// blockHash => CBlockStoreItem
/// </summary>
- public uint nBits { get; set; }
+ private ConcurrentDictionary<uint256, CBlockStoreItem> blockMap = new ConcurrentDictionary<uint256, CBlockStoreItem>();
/// <summary>
- /// Nonce counter.
+ /// Orphaned blocks map.
/// </summary>
- public uint nNonce { get; set; }
+ private ConcurrentDictionary<uint256, CBlock> orphanMap = new ConcurrentDictionary<uint256, CBlock>();
+ private ConcurrentDictionary<uint256, CBlock> orphanMapByPrev = new ConcurrentDictionary<uint256, CBlock>();
/// <summary>
- /// Next block hash.
+ /// Unconfirmed transactions.
+ ///
+ /// TxID => Transaction
/// </summary>
- public byte[] nextHash { get; set; }
+ private ConcurrentDictionary<uint256, CTransaction> mapUnconfirmedTx = new ConcurrentDictionary<uint256, CTransaction>();
/// <summary>
- /// Block type flags
+ /// Map of the proof-of-stake hashes. This is necessary for stake duplication checks.
/// </summary>
- public BlockType BlockTypeFlag { get; set; }
+ private ConcurrentDictionary<uint256, uint256> mapProofOfStake = new ConcurrentDictionary<uint256, uint256>();
- /// <summary>
- /// Stake modifier
- /// </summary>
- public long nStakeModifier { get; set; }
- /// <summary>
- /// Stake modifier checksum.
- /// </summary>
- public uint nStakeModifierChecksum { get; set; }
+ private ConcurrentDictionary<COutPoint, uint> mapStakeSeen = new ConcurrentDictionary<COutPoint, uint>();
+ private ConcurrentDictionary<COutPoint, uint> mapStakeSeenOrphan = new ConcurrentDictionary<COutPoint, uint>();
- /// <summary>
- /// Chain trust score
- /// </summary>
- public byte[] ChainTrust { get; set; }
/// <summary>
- /// Proof-of-Stake hash
+ /// Copy of chain state object.
/// </summary>
- public byte[] hashProofOfStake { get; set; }
+ private ChainState ChainParams;
/// <summary>
- /// Block height
+ /// Cursor which is pointing us to the end of best chain.
/// </summary>
- public uint nHeight { get; set; }
+ private CBlockStoreItem bestBlockCursor = null;
/// <summary>
- /// Block position in file
+ /// Cursor which is always pointing us to genesis block.
/// </summary>
- public long nBlockPos { get; set; }
+ private CBlockStoreItem genesisBlockCursor = null;
/// <summary>
- /// Block size in bytes
+ /// Current and the only instance of block storage manager. Should be a property with private setter though it's enough for the beginning.
/// </summary>
- public int nBlockSize { get; set; }
+ public static CBlockStore Instance = null;
/// <summary>
- /// Fill database item with data from given block header.
+ /// Block file stream with read/write access
/// </summary>
- /// <param name="header">Block header</param>
- /// <returns>Header hash</returns>
- public uint256 FillHeader(CBlockHeader header)
- {
- uint256 _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;
- }
+ private Stream fStreamReadWrite;
+ private uint nTimeBestReceived;
+ private int nTransactionsUpdated;
/// <summary>
- /// Reconstruct block header from item data.
+ /// Init the block storage manager.
/// </summary>
- public CBlockHeader BlockHeader
+ /// <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")
{
- get
- {
- CBlockHeader header = new CBlockHeader();
+ strDbFile = IndexDB;
+ strBlockFile = BlockFile;
- header.nVersion = nVersion;
- header.prevHash = prevHash;
- header.merkleRoot = merkleRoot;
- header.nTime = nTime;
- header.nBits = nBits;
- header.nNonce = nNonce;
+ bool firstInit = !File.Exists(strDbFile);
+ dbPlatform = new SQLitePlatformGeneric();
+ dbConn = new SQLiteConnection(dbPlatform, strDbFile);
- return header;
- }
- }
+ fStreamReadWrite = File.Open(strBlockFile, FileMode.OpenOrCreate, FileAccess.ReadWrite);
- /// <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;
+ Instance = this;
- try
+ if (firstInit)
{
- reader.Seek(nBlockPos, SeekOrigin.Begin);
-
- if (nBlockSize != reader.Read(buffer, 0, nBlockSize))
+ lock (LockObj)
{
- return false;
- }
-
- block = new CBlock(buffer);
-
- return true;
- }
- catch (IOException)
- {
- // I/O error
- return false;
- }
- catch (BlockException)
- {
- // Constructor exception
- return false;
- }
- }
+ // Create tables
+ dbConn.CreateTable<CBlockStoreItem>(CreateFlags.AutoIncPK);
+ dbConn.CreateTable<CMerkleNode>(CreateFlags.AutoIncPK);
+ dbConn.CreateTable<TxOutItem>(CreateFlags.ImplicitPK);
+ dbConn.CreateTable<ChainState>(CreateFlags.AutoIncPK);
- /// <summary>
- /// Writes given block to file and prepares cursor object for insertion into the database.
- /// </summary>
- /// <param name="writer">Stream with write access.</param>
- /// <param name="block">CBlock reference.</param>
- /// <returns>Result</returns>
- public bool WriteToFile(ref Stream writer, ref CBlock block)
- {
- try
- {
- byte[] blockBytes = block;
+ ChainParams = new ChainState()
+ {
+ nBestChainTrust = 0,
+ nBestHeight = 0,
+ nHashBestChain = 0
+ };
- var magicBytes = BitConverter.GetBytes(CBlockStore.nMagicNumber);
- var blkLenBytes = BitConverter.GetBytes(blockBytes.Length);
+ dbConn.Insert(ChainParams);
- // Seek to the end and then append magic bytes there.
- writer.Seek(0, SeekOrigin.End);
- writer.Write(magicBytes, 0, magicBytes.Length);
- writer.Write(blkLenBytes, 0, blkLenBytes.Length);
+ var genesisBlock = new CBlock(
+ Interop.HexToArray(
+ "01000000" + // nVersion=1
+ "0000000000000000000000000000000000000000000000000000000000000000" + // prevhash is zero
+ "7b0502ad2f9f675528183f83d6385794fbcaa914e6d385c6cb1d866a3b3bb34c" + // merkle root
+ "398e1151" + // nTime=1360105017
+ "ffff0f1e" + // nBits=0x1e0fffff
+ "d3091800" + // nNonce=1575379
+ "01" + // nTxCount=1
+ "01000000" + // nVersion=1
+ "398e1151" + // nTime=1360105017
+ "01" + // nInputs=1
+ "0000000000000000000000000000000000000000000000000000000000000000" + // input txid is zero
+ "ffffffff" + // n=uint.maxValue
+ "4d" + // scriptSigLen=77
+ "04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936" + // scriptSig
+ "ffffffff" + // nSequence=uint.maxValue
+ "01" + // nOutputs=1
+ "0000000000000000" + // nValue=0
+ "00" + // scriptPubkeyLen=0
+ "00000000" + // nLockTime=0
+ "00" // sigLen=0
+ ));
- // Save block size and current position in the block cursor fields.
- nBlockPos = writer.Position;
- nBlockSize = blockBytes.Length;
+ // Write block to file.
+ var itemTemplate = new CBlockStoreItem()
+ {
+ nHeight = 0
+ };
- // Write block and flush the stream.
- writer.Write(blockBytes, 0, blockBytes.Length);
- writer.Flush();
+ itemTemplate.FillHeader(genesisBlock.header);
- return true;
- }
- catch (IOException)
- {
- // I/O error
- return false;
+ if (!AddItemToIndex(ref itemTemplate, ref genesisBlock))
+ {
+ throw new Exception("Unable to write genesis block");
+ }
+ }
}
- catch (Exception)
+ else
{
- // Some serialization error
- return false;
- }
- }
+ var blockTreeItems = dbConn.Query<CBlockStoreItem>("select * from [BlockStorage] order by [ItemId] asc");
- /// <summary>
- /// Previous block cursor
- /// </summary>
- [Ignore]
- public CBlockStoreItem prev {
- get { return CBlockStore.Instance.GetCursor(prevHash); }
- }
+ // Init list of block items
+ foreach (var item in blockTreeItems)
+ {
+ blockMap.TryAdd(item.Hash, item);
- /// <summary>
- /// Next block cursor
- /// </summary>
- [Ignore]
- public CBlockStoreItem next
- {
- get { return CBlockStore.Instance.GetCursor(nextHash); }
- }
+ if (item.IsProofOfStake)
+ {
+ // build mapStakeSeen
+ mapStakeSeen.TryAdd(item.prevoutStake, item.nStakeTime);
+ }
+ }
- [Ignore]
- bool IsInMainChain
- {
- get { return (next != null); }
+ // Load data about the top node.
+ ChainParams = dbConn.Table<ChainState>().First();
+ }
}
- /// <summary>
- /// STake modifier generation flag
- /// </summary>
- [Ignore]
- public bool GeneratedStakeModifier
+ public bool GetTxOutCursor(COutPoint outpoint, ref TxOutItem txOutCursor)
{
- get { return (BlockTypeFlag & BlockType.BLOCK_STAKE_MODIFIER) != 0; }
- }
+ var queryResults = dbConn.Query<TxOutItem>("select o.* from [Outputs] o left join [MerkleNodes] m on (m.nMerkleNodeID = o.nMerkleNodeID) where m.[TransactionHash] = ?", (byte[])outpoint.hash);
- /// <summary>
- /// Stake entropy bit
- /// </summary>
- [Ignore]
- public uint StakeEntropyBit
- {
- get { return ((uint)(BlockTypeFlag & BlockType.BLOCK_STAKE_ENTROPY) >> 1); }
- }
+ if (queryResults.Count == 1)
+ {
+ txOutCursor = queryResults[0];
- /// <summary>
- /// Sets stake modifier and flag.
- /// </summary>
- /// <param name="nModifier">New stake modifier.</param>
- /// <param name="fGeneratedStakeModifier">Set generation flag?</param>
- public void SetStakeModifier(long nModifier, bool fGeneratedStakeModifier)
- {
- nStakeModifier = nModifier;
- if (fGeneratedStakeModifier)
- BlockTypeFlag |= BlockType.BLOCK_STAKE_MODIFIER;
- }
+ return true;
+ }
- /// <summary>
- /// Set entropy bit.
- /// </summary>
- /// <param name="nEntropyBit">Entropy bit value (0 or 1).</param>
- /// <returns>False if value is our of range.</returns>
- public bool SetStakeEntropyBit(byte nEntropyBit)
- {
- if (nEntropyBit > 1)
- return false;
- BlockTypeFlag |= (nEntropyBit != 0 ? BlockType.BLOCK_STAKE_ENTROPY : 0);
- return true;
- }
+ // Tx not found
- /// <summary>
- /// Set proof-of-stake flag.
- /// </summary>
- public void SetProofOfStake()
- {
- BlockTypeFlag |= BlockType.BLOCK_PROOF_OF_STAKE;
+ return false;
}
- /// <summary>
- /// Block has no proof-of-stake flag.
- /// </summary>
- [Ignore]
- public bool IsProofOfWork
- {
- get { return (BlockTypeFlag & BlockType.BLOCK_PROOF_OF_STAKE) == 0; }
- }
- /// <summary>
- /// Block has proof-of-stake flag set.
- /// </summary>
- [Ignore]
- public bool IsProofOfStake
+ public bool FetchInputs(CTransaction tx, ref Dictionary<COutPoint, TxOutItem> queued, ref Dictionary<COutPoint, TxOutItem> inputs, bool IsBlock, out bool Invalid)
{
- get { return (BlockTypeFlag & BlockType.BLOCK_PROOF_OF_STAKE) != 0; }
- }
+ Invalid = false;
- /// <summary>
- /// Chain trust score.
- /// </summary>
- [Ignore]
- public uint256 nChainTrust {
- get
+ if (tx.IsCoinBase)
{
- if (ChainTrust.Length != 32)
- {
- byte[] tmp = ChainTrust;
- Array.Resize(ref tmp, 32);
- ChainTrust = tmp;
- }
-
- return ChainTrust;
+ // Coinbase transactions have no inputs to fetch.
+ return true;
}
- set { ChainTrust = Interop.TrimArray(value); }
- }
- /// <summary>
- /// Block trust score.
- /// </summary>
- [Ignore]
- public uint256 nBlockTrust
- {
- get
+ StringBuilder queryBuilder = new StringBuilder();
+
+ queryBuilder.Append("select o.*, m.[TransactionHash] from [Outputs] o left join [MerkleNodes] m on (m.[nMerkleNodeID] = o.[nMerkleNodeID]) where ");
+
+ for (var i = 0; i < tx.vin.Length; i++)
{
- uint256 nTarget = 0;
- nTarget.Compact = nBits;
+ queryBuilder.AppendFormat(" {0} (m.[TransactionHash] = x'{1}' and o.[OutputNumber] = x'{2}')",
+ (i > 0 ? "or" : string.Empty), Interop.ToHex(tx.vin[i].prevout.hash),
+ Interop.ToHex(VarInt.EncodeVarInt(tx.vin[i].prevout.n)
+ ));
+ }
+
+ var queryResults = dbConn.Query<InputsJoin>(queryBuilder.ToString());
- /* Old protocol */
- if (nTime < NetUtils.nChainChecksSwitchTime)
+ foreach (var item in queryResults)
+ {
+ if (item.IsSpent)
{
- return IsProofOfStake ? (new uint256(1) << 256) / (nTarget + 1) : 1;
+ return false; // Already spent
}
- /* New protocol */
-
- // Calculate work amount for block
- var nPoWTrust = NetUtils.nPoWBase / (nTarget + 1);
-
- // Set nPowTrust to 1 if we are checking PoS block or PoW difficulty is too low
- nPoWTrust = (IsProofOfStake || !nPoWTrust) ? 1 : nPoWTrust;
+ var inputsKey = new COutPoint(item.TransactionHash, item.nOut);
- // Return nPoWTrust for the first 12 blocks
- if (prev == null || prev.nHeight < 12)
- return nPoWTrust;
+ item.IsSpent = true;
- CBlockStoreItem currentIndex = prev;
+ // Add output data to dictionary
+ inputs.Add(inputsKey, (TxOutItem) item);
+ }
- if (IsProofOfStake)
+ if (queryResults.Count < tx.vin.Length)
+ {
+ if (IsBlock)
{
- var nNewTrust = (new uint256(1) << 256) / (nTarget + 1);
+ // It seems that some transactions are being spent in the same block.
- // Return 1/3 of score if parent block is not the PoW block
- if (!prev.IsProofOfWork)
+ foreach (var txin in tx.vin)
{
- return nNewTrust / 3;
- }
+ var outPoint = txin.prevout;
- int nPoWCount = 0;
-
- // Check last 12 blocks type
- while (prev.nHeight - currentIndex.nHeight < 12)
- {
- if (currentIndex.IsProofOfWork)
+ if (!queued.ContainsKey(outPoint))
{
- nPoWCount++;
+ return false; // No such transaction
}
- currentIndex = currentIndex.prev;
- }
- // Return 1/3 of score if less than 3 PoW blocks found
- if (nPoWCount < 3)
- {
- return nNewTrust / 3;
- }
+ // Add output data to dictionary
+ inputs.Add(outPoint, queued[outPoint]);
- return nNewTrust;
+ // Mark output as spent
+ queued[outPoint].IsSpent = true;
+ }
}
else
{
- var nLastBlockTrust = prev.nChainTrust - prev.prev.nChainTrust;
+ // Unconfirmed transaction
- // Return nPoWTrust + 2/3 of previous block score if two parent blocks are not PoS blocks
- if (!prev.IsProofOfStake || !prev.prev.IsProofOfStake)
+ foreach (var txin in tx.vin)
{
- return nPoWTrust + (2 * nLastBlockTrust / 3);
- }
-
- int nPoSCount = 0;
+ var outPoint = txin.prevout;
+ CTransaction txPrev;
- // Check last 12 blocks type
- while (prev.nHeight - currentIndex.nHeight < 12)
- {
- if (currentIndex.IsProofOfStake)
+ if (!mapUnconfirmedTx.TryGetValue(outPoint.hash, out txPrev))
{
- nPoSCount++;
+ return false; // No such transaction
}
- currentIndex = currentIndex.prev;
- }
- // Return nPoWTrust + 2/3 of previous block score if less than 7 PoS blocks found
- if (nPoSCount < 7)
- {
- return nPoWTrust + (2 * nLastBlockTrust / 3);
- }
+ if (outPoint.n > txPrev.vout.Length)
+ {
+ Invalid = true;
- nTarget.Compact = prev.nBits;
+ return false; // nOut is out of range
+ }
+
+ // TODO: return inputs from map
+ throw new NotImplementedException();
- if (!nTarget)
- {
- return 0;
}
- var nNewTrust = (new uint256(1) << 256) / (nTarget + 1);
-
- // Return nPoWTrust + full trust score for previous block nBits
- return nPoWTrust + nNewTrust;
+ return false;
}
}
+
+ return true;
}
- }
+ private bool AddItemToIndex(ref CBlockStoreItem itemTemplate, ref CBlock block)
+ {
+ var writer = new BinaryWriter(fStreamReadWrite).BaseStream;
+ uint256 blockHash = itemTemplate.Hash;
- /// <summary>
- /// Block type.
- /// </summary>
- public enum BlockType
- {
- BLOCK_PROOF_OF_STAKE = (1 << 0), // is proof-of-stake block
- BLOCK_STAKE_ENTROPY = (1 << 1), // entropy bit for stake modifier
- BLOCK_STAKE_MODIFIER = (1 << 2), // regenerated stake modifier
- };
-
- /// <summary>
- /// Transaction type.
- /// </summary>
- public enum TxType
- {
- TX_COINBASE,
- TX_COINSTAKE,
- TX_USER
- }
+ if (blockMap.ContainsKey(blockHash))
+ {
+ // Already have this block.
+ return false;
+ }
- [Table("TransactionStorage")]
- public class CTransactionStoreItem
- {
- /// <summary>
- /// Transaction hash
- /// </summary>
- [PrimaryKey]
- public byte[] TransactionHash { get; set; }
+ // Compute chain trust score
+ itemTemplate.nChainTrust = (itemTemplate.prev != null ? itemTemplate.prev.nChainTrust : 0) + itemTemplate.nBlockTrust;
- /// <summary>
- /// Block hash
- /// </summary>
- [ForeignKey(typeof(CBlockStoreItem), Name = "Hash")]
- public byte[] BlockHash { get; set; }
+ if (!itemTemplate.SetStakeEntropyBit(Entropy.GetStakeEntropyBit(itemTemplate.nHeight, blockHash)))
+ {
+ return false; // SetStakeEntropyBit() failed
+ }
- /// <summary>
- /// Transaction type flag
- /// </summary>
- public TxType txType { get; set; }
+ // Save proof-of-stake hash value
+ if (itemTemplate.IsProofOfStake)
+ {
+ uint256 hashProofOfStake;
+ if (!GetProofOfStakeHash(blockHash, out hashProofOfStake))
+ {
+ return false; // hashProofOfStake not found
+ }
+ itemTemplate.hashProofOfStake = hashProofOfStake;
+ }
- /// <summary>
- /// Tx position in file
- /// </summary>
- public long nTxPos { get; set; }
+ // compute stake modifier
+ long nStakeModifier = 0;
+ bool fGeneratedStakeModifier = false;
+ if (!StakeModifier.ComputeNextStakeModifier(itemTemplate, ref nStakeModifier, ref fGeneratedStakeModifier))
+ {
+ return false; // ComputeNextStakeModifier() failed
+ }
- /// <summary>
- /// Transaction size
- /// </summary>
- public int nTxSize { get; set; }
+ itemTemplate.SetStakeModifier(nStakeModifier, fGeneratedStakeModifier);
+ itemTemplate.nStakeModifierChecksum = StakeModifier.GetStakeModifierChecksum(itemTemplate);
- /// <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[CTransaction.nMaxTxSize];
- tx = null;
+ // TODO: verify stake modifier checkpoints
- try
+ // Add to index
+ if (block.IsProofOfStake)
{
- reader.Seek(nTxPos, SeekOrigin.Begin); // Seek to transaction offset
-
- if (nTxSize != reader.Read(buffer, 0, nTxSize))
- {
- return false;
- }
-
- tx = new CTransaction(buffer);
+ itemTemplate.SetProofOfStake();
- return true;
+ itemTemplate.prevoutStake = block.vtx[1].vin[0].prevout;
+ itemTemplate.nStakeTime = block.vtx[1].nTime;
}
- catch (IOException)
+
+ if (!itemTemplate.WriteToFile(ref writer, ref block))
{
- // I/O error
return false;
}
- catch (TransactionConstructorException)
+
+ if (dbConn.Insert(itemTemplate) == 0)
{
- // Constructor error
- return false;
+ return false; // Insert failed
}
- }
- }
- public class CBlockStore : IDisposable
- {
- public const uint nMagicNumber = 0xe5e9e8e4;
+ // Get last RowID.
+ itemTemplate.ItemID = dbPlatform.SQLiteApi.LastInsertRowid(dbConn.Handle);
+
+ if (!blockMap.TryAdd(blockHash, itemTemplate))
+ {
+ return false; // blockMap add failed
+ }
- private bool disposed = false;
- private object LockObj = new object();
+ if (itemTemplate.nChainTrust > ChainParams.nBestChainTrust)
+ {
+ // New best chain
- /// <summary>
- /// SQLite connection object.
- /// </summary>
- private SQLiteConnection dbConn;
+ if (!SetBestChain(ref itemTemplate))
+ {
+ return false; // SetBestChain failed.
+ }
+ }
- /// <summary>
- /// Block file.
- /// </summary>
- private string strBlockFile;
+ return true;
+ }
- /// <summary>
- /// Index database file.
- /// </summary>
- private string strDbFile;
+ private bool SetBestChain(ref CBlockStoreItem cursor)
+ {
+ uint256 hashBlock = cursor.Hash;
- /// <summary>
- /// Map of block tree nodes.
- /// </summary>
- private ConcurrentDictionary<uint256, CBlockStoreItem> blockMap = new ConcurrentDictionary<uint256, CBlockStoreItem>();
+ if (genesisBlockCursor == null && hashBlock == NetInfo.nHashGenesisBlock)
+ {
+ genesisBlockCursor = cursor;
+ }
+ else if (ChainParams.nHashBestChain == (uint256)cursor.prevHash)
+ {
+ if (!SetBestChainInner(cursor))
+ {
+ return false;
+ }
+ }
+ else
+ {
+ // the first block in the new chain that will cause it to become the new best chain
+ var cursorIntermediate = cursor;
- /// <summary>
- /// Orphaned blocks map.
- /// </summary>
- private ConcurrentDictionary<uint256, CBlock> orphanMap = new ConcurrentDictionary<uint256, CBlock>();
- private ConcurrentDictionary<uint256, CBlock> orphanMapByPrev = new ConcurrentDictionary<uint256, CBlock>();
+ // list of blocks that need to be connected afterwards
+ var secondary = new List<CBlockStoreItem>();
- /// <summary>
- /// Map of unspent items.
- /// </summary>
- private ConcurrentDictionary<uint256, CTransactionStoreItem> txMap = new ConcurrentDictionary<uint256, CTransactionStoreItem>();
+ // Reorganize is costly in terms of db load, as it works in a single db transaction.
+ // Try to limit how much needs to be done inside
+ while (cursorIntermediate.prev != null && cursorIntermediate.prev.nChainTrust > bestBlockCursor.nChainTrust)
+ {
+ secondary.Add(cursorIntermediate);
+ cursorIntermediate = cursorIntermediate.prev;
+ }
- private ConcurrentDictionary<uint256, uint256> mapProofOfStake = new ConcurrentDictionary<uint256, uint256>();
+ // Switch to new best branch
+ if (!Reorganize(cursorIntermediate))
+ {
+ InvalidChainFound(cursor);
+ return false; // reorganize failed
+ }
- public static CBlockStore Instance;
+ // Connect further blocks
+ foreach (var currentCursor in secondary)
+ {
+ CBlock block;
+ if (!currentCursor.ReadFromFile(ref fStreamReadWrite, out block))
+ {
+ // ReadFromDisk failed
+ break;
+ }
- /// <summary>
- /// Block file stream with read access
- /// </summary>
- private Stream fStreamReadWrite;
+ // errors now are not fatal, we still did a reorganisation to a new chain in a valid way
+ if (!SetBestChainInner(currentCursor))
+ {
+ break;
+ }
+ }
+ }
- /// <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")
- {
- strDbFile = IndexDB;
- strBlockFile = BlockFile;
+ bestBlockCursor = cursor;
+ nTimeBestReceived = Interop.GetTime();
+ nTransactionsUpdated++;
- bool firstInit = !File.Exists(strDbFile);
- dbConn = new SQLiteConnection(new SQLitePlatformGeneric(), strDbFile);
+ return true;
+ }
- fStreamReadWrite = File.Open(strBlockFile, FileMode.OpenOrCreate, FileAccess.ReadWrite);
+ private void InvalidChainFound(CBlockStoreItem cursor)
+ {
+ throw new NotImplementedException();
+ }
- Instance = this;
+ private bool Reorganize(CBlockStoreItem cursorIntermediate)
+ {
+ // Find the fork
+ var fork = bestBlockCursor;
+ var longer = cursorIntermediate;
- if (firstInit)
+ while (fork.ItemID != longer.ItemID)
{
- lock (LockObj)
+ while (longer.nHeight > fork.nHeight)
{
- // Create tables
- dbConn.CreateTable<CBlockStoreItem>(CreateFlags.AutoIncPK);
- dbConn.CreateTable<CTransactionStoreItem>(CreateFlags.ImplicitPK);
+ if ((longer = longer.prev) == null)
+ {
+ return false; // longer.prev is null
+ }
+ }
- var genesisBlock = new CBlock(
- Interop.HexToArray(
- "01000000" + // nVersion=1
- "0000000000000000000000000000000000000000000000000000000000000000" + // prevhash is zero
- "7b0502ad2f9f675528183f83d6385794fbcaa914e6d385c6cb1d866a3b3bb34c" + // merkle root
- "398e1151" + // nTime=1360105017
- "ffff0f1e" + // nBits=0x1e0fffff
- "d3091800" + // nNonce=1575379
- "01" + // nTxCount=1
- "01000000" + // nVersion=1
- "398e1151" + // nTime=1360105017
- "01" + // nInputs=1
- "0000000000000000000000000000000000000000000000000000000000000000" + // input txid is zero
- "ffffffff" + // n=uint.maxValue
- "4d" + // scriptSigLen=77
- "04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936" + // scriptSig
- "ffffffff" + // nSequence=uint.maxValue
- "01" + // nOutputs=1
- "0000000000000000" + // nValue=0
- "00" + // scriptPubkeyLen=0
- "00000000" + // nLockTime=0
- "00" // sigLen=0
- ));
+ if (fork.ItemID == longer.ItemID)
+ {
+ break;
+ }
- // Write block to file.
- var itemTemplate = new CBlockStoreItem()
- {
- nHeight = 0
- };
+ if ((fork = fork.prev) == null)
+ {
+ return false; // fork.prev is null
+ }
+ }
- itemTemplate.FillHeader(genesisBlock.header);
+ // List of what to disconnect
+ var disconnect = new List<CBlockStoreItem>();
+ for (var cursor = bestBlockCursor; cursor.ItemID != fork.ItemID; cursor = cursor.prev)
+ {
+ disconnect.Add(cursor);
+ }
- if (!AddItemToIndex(ref itemTemplate, ref genesisBlock))
+ // List of what to connect
+ var connect = new List<CBlockStoreItem>();
+ for (var cursor = cursorIntermediate; cursor.ItemID != fork.ItemID; cursor = cursor.prev)
+ {
+ connect.Add(cursor);
+ }
+ connect.Reverse();
+
+ // Disconnect shorter branch
+ var txResurrect = new List<CTransaction>();
+ foreach (var blockCursor in disconnect)
+ {
+ CBlock block;
+ if (!blockCursor.ReadFromFile(ref fStreamReadWrite, out block))
+ {
+ return false; // ReadFromFile for disconnect failed.
+ }
+ if (!DisconnectBlock(blockCursor, ref block))
+ {
+ return false; // DisconnectBlock failed.
+ }
+
+ // Queue memory transactions to resurrect
+ foreach (var tx in block.vtx)
+ {
+ if (!tx.IsCoinBase && !tx.IsCoinStake)
{
- throw new Exception("Unable to write genesis block");
+ txResurrect.Add(tx);
}
}
}
- else
+
+
+ // Connect longer branch
+ var txDelete = new List<CTransaction>();
+ foreach (var cursor in connect)
{
- var blockTreeItems = dbConn.Query<CBlockStoreItem>("select * from [BlockStorage] order by [ItemId] asc");
+ CBlock block;
+ if (!cursor.ReadFromFile(ref fStreamReadWrite, out block))
+ {
+ return false; // ReadFromDisk for connect failed
+ }
- // Init list of block items
- foreach (var item in blockTreeItems)
+ if (!ConnectBlock(cursor, ref block))
{
- blockMap.TryAdd(item.Hash, item);
+ // Invalid block
+ return false; // ConnectBlock failed
+ }
+
+ // Queue memory transactions to delete
+ foreach (var tx in block.vtx)
+ {
+ txDelete.Add(tx);
}
}
- }
- public bool GetTransaction(uint256 TxID, ref CTransaction tx)
- {
- var reader = new BinaryReader(fStreamReadWrite).BaseStream;
- var QueryTx = dbConn.Query<CTransactionStoreItem>("select * from [TransactionStorage] where [TransactionHash] = ?", (byte[])TxID);
+ if (!UpdateTopChain(cursorIntermediate))
+ {
+ return false; // UpdateTopChain failed
+ }
+
+ // Make sure it's successfully written to disk
+ dbConn.Commit();
- if (QueryTx.Count == 1)
+ // Resurrect memory transactions that were in the disconnected branch
+ foreach (var tx in txResurrect)
{
- return QueryTx[0].ReadFromFile(ref reader, out tx);
+ mapUnconfirmedTx.TryAdd(tx.Hash, tx);
}
- // Tx not found
+ // Delete redundant memory transactions that are in the connected branch
+ foreach (var tx in txDelete)
+ {
+ CTransaction dummy;
+ mapUnconfirmedTx.TryRemove(tx.Hash, out dummy);
+ }
- return false;
+ return true; // Done
}
- private bool AddItemToIndex(ref CBlockStoreItem itemTemplate, ref CBlock block)
+ private bool DisconnectBlock(CBlockStoreItem blockCursor, ref CBlock block)
{
- var writer = new BinaryWriter(fStreamReadWrite).BaseStream;
- uint256 blockHash = itemTemplate.Hash;
+ throw new NotImplementedException();
+ }
- if (blockMap.ContainsKey(blockHash))
+ private bool SetBestChainInner(CBlockStoreItem cursor)
+ {
+ uint256 hash = cursor.Hash;
+ CBlock block;
+ if (!cursor.ReadFromFile(ref fStreamReadWrite, out block))
{
- // Already have this block.
- return false;
+ return false; // Unable to read block from file.
}
- // Compute chain trust score
- itemTemplate.nChainTrust = (itemTemplate.prev != null ? itemTemplate.prev.nChainTrust : 0) + itemTemplate.nBlockTrust;
-
- if (!itemTemplate.SetStakeEntropyBit(Entropy.GetStakeEntropyBit(itemTemplate.nHeight, blockHash)))
+ // Adding to current best branch
+ if (!ConnectBlock(cursor, ref block) || !UpdateTopChain(cursor))
{
- return false; // SetStakeEntropyBit() failed
+ InvalidChainFound(cursor);
+ return false;
}
- // Save proof-of-stake hash value
- if (itemTemplate.IsProofOfStake)
+ // Add to current best branch
+ cursor.prev.next = cursor;
+
+ dbConn.Commit();
+
+ // Delete redundant memory transactions
+ foreach (var tx in block.vtx)
{
- uint256 hashProofOfStake;
- if (!CBlockStore.Instance.GetProofOfStakeHash(blockHash, out hashProofOfStake))
- {
- return false; // hashProofOfStake not found
- }
- itemTemplate.hashProofOfStake = hashProofOfStake;
+ CTransaction dummy;
+ mapUnconfirmedTx.TryRemove(tx.Hash, out dummy);
}
- // TODO: compute stake modifier
+ return true;
+ }
- // ppcoin: compute stake modifier
- long nStakeModifier = 0;
- bool fGeneratedStakeModifier = false;
- if (!StakeModifier.ComputeNextStakeModifier(itemTemplate, ref nStakeModifier, ref fGeneratedStakeModifier))
+ private bool ConnectBlock(CBlockStoreItem cursor, ref CBlock block, bool fJustCheck=false)
+ {
+ // Check it again in case a previous version let a bad block in, but skip BlockSig checking
+ if (!block.CheckBlock(!fJustCheck, !fJustCheck, false))
{
- return false; // ComputeNextStakeModifier() failed
+ return false; // Invalid block found.
}
- itemTemplate.SetStakeModifier(nStakeModifier, fGeneratedStakeModifier);
- itemTemplate.nStakeModifierChecksum = StakeModifier.GetStakeModifierChecksum(itemTemplate);
+ bool fScriptChecks = cursor.nHeight >= Checkpoints.TotalBlocksEstimate;
+ var scriptFlags = scriptflag.SCRIPT_VERIFY_NOCACHE | scriptflag.SCRIPT_VERIFY_P2SH;
- // TODO: verify stake modifier checkpoints
+ ulong nFees = 0;
+ ulong nValueIn = 0;
+ ulong nValueOut = 0;
+ uint nSigOps = 0;
- // Add to index
- if (block.IsProofOfStake)
+ var queuedMerkleNodes = new Dictionary<uint256, CMerkleNode>();
+ var queued = new Dictionary<COutPoint, TxOutItem>();
+
+ for (var nTx = 0; nTx < block.vtx.Length; nTx++)
{
- itemTemplate.SetProofOfStake();
+ var tx = block.vtx[nTx];
+ var hashTx = tx.Hash;
+ var nTxPos = cursor.nBlockPos + block.GetTxOffset(nTx);
+
+ Dictionary<COutPoint, TxOutItem> txouts;
+ if (GetOutputs(hashTx, out txouts))
+ {
+ // Do not allow blocks that contain transactions which 'overwrite' older transactions,
+ // unless those are already completely spent.
+ return false;
+ }
+
+ nSigOps += tx.LegacySigOpCount;
+ if (nSigOps > CBlock.nMaxSigOps)
+ {
+ return false; // too many sigops
+ }
+
+ var inputs = new Dictionary<COutPoint, TxOutItem>();
+
+ if (tx.IsCoinBase)
+ {
+ nValueOut += tx.nValueOut;
+ }
+ else
+ {
+ bool Invalid;
+ if (!FetchInputs(tx, ref queued, ref inputs, true, out Invalid))
+ {
+ return false; // Unable to fetch some inputs.
+ }
+
+ // Add in sigops done by pay-to-script-hash inputs;
+ // this is to prevent a "rogue miner" from creating
+ // an incredibly-expensive-to-validate block.
+ nSigOps += tx.GetP2SHSigOpCount(inputs);
+ if (nSigOps > CBlock.nMaxSigOps)
+ {
+ return false; // too many sigops
+ }
+
+ ulong nTxValueIn = tx.GetValueIn(inputs);
+ ulong nTxValueOut = tx.nValueOut;
+
+ nValueIn += nTxValueIn;
+ nValueOut += nTxValueOut;
+
+ if (!tx.IsCoinStake)
+ {
+ nFees += nTxValueIn - nTxValueOut;
+ }
+
+ if (!ConnectInputs(tx, inputs, queued, cursor, fScriptChecks, scriptFlags))
+ {
+ return false;
+ }
+ }
+
+ for (var i = 0u; i < tx.vout.Length; i++)
+ {
+ var mNode = new CMerkleNode(cursor.ItemID, nTxPos, tx);
+ queuedMerkleNodes.Add(hashTx, mNode);
+
+ var outKey = new COutPoint(hashTx, i);
+ var outData = new TxOutItem();
+
+ outData.nValue = tx.vout[i].nValue;
+ outData.scriptPubKey = tx.vout[i].scriptPubKey;
+ outData.nOut = i;
+
+
+ outData.IsSpent = false;
+
+ queued.Add(outKey, outData);
+ }
}
- if (!itemTemplate.WriteToFile(ref writer, ref block))
+ if (!block.IsProofOfStake)
{
- return false;
+ ulong nBlockReward = CBlock.GetProofOfWorkReward(cursor.nBits, nFees);
+
+ // Check coinbase reward
+ if (block.vtx[0].nValueOut > nBlockReward)
+ {
+ return false; // coinbase reward exceeded
+ }
}
- dbConn.Insert(itemTemplate);
+ cursor.nMint = (long) (nValueOut - nValueIn + nFees);
+ cursor.nMoneySupply = (cursor.prev != null ? cursor.prev.nMoneySupply : 0) + (long)nValueOut - (long)nValueIn;
- // We have no SetBestChain and ConnectBlock/Disconnect block yet, so adding these transactions manually.
- for (int i = 0; i < block.vtx.Length; i++)
+ if (!UpdateDBCursor(ref cursor))
{
- // Handle trasactions
+ return false; // Unable to commit changes
+ }
- if (!block.vtx[i].VerifyScripts())
- {
- return false;
- }
+ if (fJustCheck)
+ {
+ return true;
+ }
- var nTxOffset = itemTemplate.nBlockPos + block.GetTxOffset(i);
- TxType txnType = TxType.TX_USER;
+ // Write queued transaction changes
+ var actualMerkleNodes = new Dictionary<uint256, CMerkleNode>();
+ var queuedOutpointItems = new List<TxOutItem>();
+ foreach(KeyValuePair<COutPoint, TxOutItem> outPair in queued)
+ {
+ uint256 txID = outPair.Key.hash;
+ CMerkleNode merkleNode;
- if (block.vtx[i].IsCoinBase)
+ if (actualMerkleNodes.ContainsKey(txID))
{
- txnType = TxType.TX_COINBASE;
+ merkleNode = actualMerkleNodes[txID];
}
- else if (block.vtx[i].IsCoinStake)
+ else
{
- txnType = TxType.TX_COINSTAKE;
+ merkleNode = queuedMerkleNodes[txID];
+ if (!SaveMerkleNode(ref merkleNode))
+ {
+ // Unable to save merkle tree cursor.
+ return false;
+ }
+ actualMerkleNodes.Add(txID, merkleNode);
}
- var NewTxItem = new CTransactionStoreItem()
- {
- TransactionHash = block.vtx[i].Hash,
- BlockHash = blockHash,
- nTxPos = nTxOffset,
- nTxSize = block.vtx[i].Size,
- txType = txnType
- };
-
- dbConn.Insert(NewTxItem);
+ var outItem = outPair.Value;
+ outItem.nMerkleNodeID = merkleNode.nMerkleNodeID;
+
+ queuedOutpointItems.Add(outItem);
}
- return blockMap.TryAdd(blockHash, itemTemplate);
+ if (!SaveOutpoints(ref queuedOutpointItems))
+ {
+ return false; // Unable to save outpoints
+ }
+
+ return true;
+ }
+
+ /// <summary>
+ /// Insert set of outpoints
+ /// </summary>
+ /// <param name="queuedOutpointItems">List of TxOutItem objects.</param>
+ /// <returns>Result</returns>
+ private bool SaveOutpoints(ref List<TxOutItem> queuedOutpointItems)
+ {
+ return dbConn.InsertAll(queuedOutpointItems, false) != 0;
+ }
+
+ /// <summary>
+ /// Insert merkle node into db and set actual record id value.
+ /// </summary>
+ /// <param name="merkleNode">Merkle node object reference.</param>
+ /// <returns>Result</returns>
+ private bool SaveMerkleNode(ref CMerkleNode merkleNode)
+ {
+ if (dbConn.Insert(merkleNode) == 0)
+ {
+ return false;
+ }
+
+ merkleNode.nMerkleNodeID = dbPlatform.SQLiteApi.LastInsertRowid(dbConn.Handle);
+
+ return true;
+ }
+
+ private bool ConnectInputs(CTransaction tx, Dictionary<COutPoint, TxOutItem> inputs, Dictionary<COutPoint, TxOutItem> queued, CBlockStoreItem cursor, bool fScriptChecks, scriptflag scriptFlags)
+ {
+ throw new NotImplementedException();
+ }
+
+ /// <summary>
+ /// Set new top node or current best chain.
+ /// </summary>
+ /// <param name="cursor"></param>
+ /// <returns></returns>
+ private bool UpdateTopChain(CBlockStoreItem cursor)
+ {
+ ChainParams.HashBestChain = cursor.Hash;
+ ChainParams.nBestChainTrust = cursor.nChainTrust;
+ ChainParams.nBestHeight = cursor.nHeight;
+
+ return dbConn.Update(ChainParams) != 0;
}
/// <summary>
uint nHeight = prevBlockCursor.nHeight + 1;
// Check timestamp against prev
- if (NetUtils.FutureDrift(block.header.nTime) < prevBlockHeader.nTime)
+ if (NetInfo.FutureDrift(block.header.nTime) < prevBlockHeader.nTime)
{
// block's timestamp is too early
return false;
return true;
}
+ /// <summary>
+ /// GEt block by hash.
+ /// </summary>
+ /// <param name="blockHash">Block hash</param>
+ /// <param name="block">Block object reference</param>
+ /// <param name="nBlockPos">Block position reference</param>
+ /// <returns>Result</returns>
public bool GetBlock(uint256 blockHash, ref CBlock block, ref long nBlockPos)
{
- var reader = new BinaryReader(fStreamReadWrite).BaseStream;
-
- var QueryBlock = dbConn.Query<CBlockStoreItem>("select * from [BlockStorage] where [Hash] = ?", (byte[])blockHash);
+ CBlockStoreItem cursor;
- if (QueryBlock.Count == 1)
+ if (!blockMap.TryGetValue(blockHash, out cursor))
{
- nBlockPos = QueryBlock[0].nBlockPos;
- return QueryBlock[0].ReadFromFile(ref reader, out block);
+ return false; // Unable to fetch block cursor
}
- // Block not found
+ nBlockPos = cursor.nBlockPos;
- return false;
+ return cursor.ReadFromFile(ref fStreamReadWrite, out block);
}
- public bool GetByTransactionID(uint256 TxID, ref CBlock block, ref CTransaction tx, ref long nBlockPos, ref long nTxPos)
+ /// <summary>
+ /// Get block and transaction by transaction hash.
+ /// </summary>
+ /// <param name="TxID">Transaction hash</param>
+ /// <param name="block">Block reference</param>
+ /// <param name="nBlockPos">Block position reference</param>
+ /// <returns>Result of operation</returns>
+ public bool GetBlockByTransactionID(uint256 TxID, ref CBlock block, ref long nBlockPos)
{
- var QueryTx = dbConn.Query<CTransactionStoreItem>("select * from [TransactionStorage] where [TransactionHash] = ?", (byte[])TxID);
+ var queryResult = dbConn.Query<CBlockStoreItem>("select b.* from [BlockStorage] b left join [MerkleNodes] m on (b.[ItemID] = m.[nParentBlockID]) where m.[TransactionHash] = ?", (byte[])TxID);
- if (QueryTx.Count == 1)
+ if (queryResult.Count == 1)
{
- nTxPos = QueryTx[0].nTxPos;
- return GetBlock(QueryTx[0].BlockHash, ref block, ref nBlockPos);
+ CBlockStoreItem blockCursor = queryResult[0];
+
+ return blockCursor.ReadFromFile(ref fStreamReadWrite, out block);
}
// Tx not found
return false;
}
+ public bool GetOutputs(uint256 transactionHash, out Dictionary<COutPoint, TxOutItem> txouts, bool fUnspentOnly=true)
+ {
+ txouts = null;
+
+ var queryParams = new object[] { (byte[])transactionHash, fUnspentOnly ? OutputFlags.AVAILABLE : (OutputFlags.AVAILABLE | OutputFlags.SPENT) };
+ var queryResult = dbConn.Query<TxOutItem>("select o.* from [Outputs] o left join [MerkleNodes] m on m.[nMerkleNodeID] = o.[nMerkleNodeID] where m.[TransactionHash] = ? and outputFlags = ?", queryParams);
+
+ if (queryResult.Count != 0)
+ {
+ txouts = new Dictionary<COutPoint, TxOutItem>();
+
+ foreach (var o in queryResult)
+ {
+ var outpointKey = new COutPoint(transactionHash, o.nOut);
+ var outpointData = o;
+
+ txouts.Add(outpointKey, outpointData);
+ }
+
+ // There are some unspent inputs.
+ return true;
+ }
+
+ // This transaction has been spent completely.
+ return false;
+ }
+
+ public bool WriteNodes(ref CMerkleNode[] merkleNodes)
+ {
+
+
+ return true;
+ }
+
/// <summary>
/// Get block cursor from map.
/// </summary>
/// <param name="blockHash">block hash</param>
/// <returns>Cursor or null</returns>
- public CBlockStoreItem GetCursor(uint256 blockHash)
+ public CBlockStoreItem GetMapCursor(uint256 blockHash)
{
if (blockHash == 0)
{
return null;
}
- // First, check our block map.
- CBlockStoreItem item = null;
- if (blockMap.TryGetValue(blockHash, out item))
- {
- return item;
- }
+ CBlockStoreItem cursor = null;
+ blockMap.TryGetValue(blockHash, out cursor);
+
+ return cursor;
+ }
+ /// <summary>
+ /// Load cursor from database.
+ /// </summary>
+ /// <param name="blockHash">Block hash</param>
+ /// <returns>Block cursor object</returns>
+ public CBlockStoreItem GetDBCursor(uint256 blockHash)
+ {
// Trying to get cursor from the database.
var QueryBlockCursor = dbConn.Query<CBlockStoreItem>("select * from [BlockStorage] where [Hash] = ?", (byte[])blockHash);
return null;
}
+ /// <summary>
+ /// Update cursor in memory and on disk.
+ /// </summary>
+ /// <param name="cursor">Block cursor</param>
+ /// <returns>Result</returns>
+ public bool UpdateMapCursor(CBlockStoreItem cursor)
+ {
+ var original = blockMap[cursor.Hash];
+ return blockMap.TryUpdate(cursor.Hash, cursor, original);
+ }
+
+ /// <summary>
+ /// Update cursor record in database.
+ /// </summary>
+ /// <param name="cursor">Block cursor object</param>
+ /// <returns>Result</returns>
+ public bool UpdateDBCursor(ref CBlockStoreItem cursor)
+ {
+ return dbConn.Update(cursor) != 0;
+ }
+
public bool ProcessBlock(ref CBlock block)
{
var blockHash = block.header.Hash;
if (block.IsProofOfStake)
{
- if (!block.SignatureOK || !block.vtx[1].VerifyScripts())
+ if (!block.SignatureOK)
{
// Proof-of-Stake signature validation failure.
return false;
readerForBlocks.Seek(nOffset, SeekOrigin.Begin); // Seek to previous offset + previous block length
- dbConn.BeginTransaction();
-
while (readerForBlocks.Read(buffer, 0, 4) == 4) // Read magic number
{
var nMagic = BitConverter.ToUInt32(buffer, 0);
int nCount = blockMap.Count;
Console.WriteLine("nCount={0}, Hash={1}, Time={2}", nCount, block.header.Hash, DateTime.Now); // Commit on each 100th block
+ /*
if (nCount % 100 == 0 && nCount != 0)
{
Console.WriteLine("Commit...");
dbConn.Commit();
dbConn.BeginTransaction();
- }
+ }*/
}
dbConn.Commit();
git://git.novaco.in / NovacoinLibrary.git / blobdiff