using SQLiteNetExtensions.Attributes;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
+using System.Text;
namespace Novacoin
{
- /// <summary>
- /// Block headers table
- /// </summary>
[Table("BlockStorage")]
- public class CBlockStoreItem
+ public class CBlockStoreItem : IBlockStorageItem
{
+ #region IBlockStorageItem
/// <summary>
/// Item ID in the database
/// </summary>
/// <summary>
/// Version of block schema
/// </summary>
+ [Column("nVersion")]
public uint nVersion { get; set; }
/// <summary>
/// Previous block hash.
/// </summary>
+ [Column("prevHash")]
public byte[] prevHash { get; set; }
/// <summary>
/// Merkle root hash.
/// </summary>
+ [Column("merkleRoot")]
public byte[] merkleRoot { get; set; }
/// <summary>
/// Block timestamp.
/// </summary>
+ [Column("nTime")]
public uint nTime { get; set; }
/// <summary>
/// Compressed difficulty representation.
/// </summary>
+ [Column("nBits")]
public uint nBits { get; set; }
/// <summary>
/// Nonce counter.
/// </summary>
+ [Column("nNonce")]
public uint nNonce { get; set; }
/// <summary>
/// Next block hash.
/// </summary>
+ [Column("nextHash")]
public byte[] nextHash { get; set; }
/// <summary>
/// Block type flags
/// </summary>
+ [Column("BlockTypeFlag")]
public BlockType BlockTypeFlag { get; set; }
/// <summary>
/// Stake modifier
/// </summary>
+ [Column("nStakeModifier")]
public long nStakeModifier { get; set; }
/// <summary>
/// Proof-of-Stake hash
/// </summary>
+ [Column("hashProofOfStake")]
public byte[] hashProofOfStake { get; set; }
/// <summary>
/// Stake generation outpoint.
/// </summary>
+ [Column("prevoutStake")]
public byte[] prevoutStake { get; set; }
/// <summary>
/// Stake generation time.
/// </summary>
+ [Column("nStakeTime")]
public uint nStakeTime { get; set; }
-
+
/// <summary>
- /// Block height
+ /// Block height, encoded in VarInt format
/// </summary>
+ [Column("nHeight")]
public uint nHeight { get; set; }
/// <summary>
- /// Block position in file
+ /// Chain trust score, serialized and trimmed uint256 representation.
+ /// </summary>
+ [Column("ChainTrust")]
+ public byte[] ChainTrust { get; set; }
+
+ /// <summary>
+ /// Block position in file, encoded in VarInt format
+ /// </summary>
+ [Column("BlockPos")]
+ public byte[] BlockPos { get; set; }
+
+ /// <summary>
+ /// Block size in bytes, encoded in VarInt format
+ /// </summary>
+ [Column("BlockSize")]
+ public byte[] BlockSize { get; set; }
+ #endregion
+
+ /// <summary>
+ /// Accessor and mutator for BlockPos value.
/// </summary>
- public long nBlockPos { get; set; }
+ [Ignore]
+ public long nBlockPos
+ {
+ get { return (long)VarInt.DecodeVarInt(BlockPos); }
+ set { BlockPos = VarInt.EncodeVarInt(value); }
+ }
/// <summary>
- /// Block size in bytes
+ /// Accessor and mutator for BlockSize value.
/// </summary>
- public int nBlockSize { get; set; }
+ [Ignore]
+ public int nBlockSize
+ {
+ get { return (int)VarInt.DecodeVarInt(BlockSize); }
+ set { BlockSize = VarInt.EncodeVarInt(value); }
+ }
/// <summary>
/// Fill database item with data from given block header.
/// <returns>Header hash</returns>
public uint256 FillHeader(CBlockHeader header)
{
- uint256 _hash;
- Hash = _hash = header.Hash;
+ uint256 _hash = header.Hash;
+
+ Hash = _hash;
nVersion = header.nVersion;
prevHash = header.prevHash;
/// Previous block cursor
/// </summary>
[Ignore]
- public CBlockStoreItem prev {
- get { return CBlockStore.Instance.GetCursor(prevHash); }
+ public CBlockStoreItem prev
+ {
+ get { return CBlockStore.Instance.GetMapCursor(prevHash); }
}
/// <summary>
[Ignore]
public CBlockStoreItem next
{
- get { return CBlockStore.Instance.GetCursor(nextHash); }
+ get
+ {
+ if (nextHash == null)
+ {
+ return null;
+ }
+
+ return CBlockStore.Instance.GetMapCursor(nextHash);
+ }
set
{
- CBlockStoreItem newCursor = this;
- newCursor.nextHash = value.Hash;
+ nextHash = value.Hash;
- CBlockStore.Instance.UpdateCursor(this, ref newCursor);
+ CBlockStore.Instance.UpdateMapCursor(this);
}
}
nTarget.Compact = nBits;
/* Old protocol */
- if (nTime < NetUtils.nChainChecksSwitchTime)
+ if (nTime < NetInfo.nChainChecksSwitchTime)
{
return IsProofOfStake ? (new uint256(1) << 256) / (nTarget + 1) : 1;
}
/* New protocol */
// Calculate work amount for block
- var nPoWTrust = NetUtils.nPoWBase / (nTarget + 1);
+ var nPoWTrust = NetInfo.nPoWBase / (nTarget + 1);
// Set nPowTrust to 1 if we are checking PoS block or PoW difficulty is too low
nPoWTrust = (IsProofOfStake || !nPoWTrust) ? 1 : nPoWTrust;
/// <summary>
/// Chain trust score
/// </summary>
- public uint256 nChainTrust;
+ [Ignore]
+ public uint256 nChainTrust {
+ get { return Interop.AppendWithZeros(ChainTrust); }
+ set { ChainTrust = Interop.TrimArray(value); }
+ }
+
+ public long nMint { get; internal set; }
+ public long nMoneySupply { get; internal set; }
}
/// <summary>
/// <summary>
/// Transaction type.
/// </summary>
- public enum TxType
+ public enum TxFlags : byte
{
TX_COINBASE,
TX_COINSTAKE,
}
/// <summary>
- /// Transaction type.
+ /// Output flags.
/// </summary>
- public enum OutputType
+ public enum OutputFlags : byte
{
- TX_USER = (1 << 0), // User output
- TX_COINBASE = (1 << 1), // Coinbase output
- TX_COINSTAKE = (1 << 2), // Coinstake output
- TX_AVAILABLE = (2 << 0), // Unspent output
- TX_SPENT = (2 << 1) // Spent output
+ AVAILABLE, // Unspent output
+ SPENT // Spent output
}
[Table("MerkleNodes")]
- public class MerkleNode
+ public class CMerkleNode : IMerkleNode
{
+ #region IMerkleNode
+ /// <summary>
+ /// Node identifier
+ /// </summary>
[PrimaryKey, AutoIncrement]
public long nMerkleNodeID { get; set; }
public long nParentBlockID { get; set; }
/// <summary>
- /// Transaction hash
- /// </summary>
- public byte[] TransactionHash { get; set; }
-
- public static bool QueryParentBlockCursor(uint256 transactionHash, out CBlockStoreItem cursor)
- {
- throw new NotImplementedException();
- }
- }
-
- [Table("Outputs")]
- public class TxOutItem
- {
- /// <summary>
- /// Link the transaction hash with database item identifier.
- /// </summary>
- private static ConcurrentDictionary<uint256, long> outMap = new ConcurrentDictionary<uint256, long>();
-
- /// <summary>
- /// Reference to transaction item.
- /// </summary>
- [ForeignKey(typeof(MerkleNode), Name = "nMerkleNodeID")]
- public long nMerkleNodeID { get; set; }
-
- /// <summary>
- /// Output flags
+ /// Transaction type flag
/// </summary>
- public OutputType outputFlags { get; set; }
+ [Column("TransactionFlags")]
+ public TxFlags TransactionFlags { get; set; }
/// <summary>
- /// Output number in VarInt format.
+ /// Transaction hash
/// </summary>
- public byte[] OutputNumber { get; set; }
+ [Column("TransactionHash")]
+ public byte[] TransactionHash { get; set; }
/// <summary>
- /// Output value in VarInt format.
+ /// Transaction offset from the beginning of block header, encoded in VarInt format.
/// </summary>
- public byte[] OutputValue { get; set; }
+ [Column("TxOffset")]
+ public byte[] TxOffset { get; set; }
/// <summary>
- /// Second half of script which contains spending instructions.
+ /// Transaction size, encoded in VarInt format.
/// </summary>
- public byte[] scriptPubKey { get; set; }
+ [Column("TxSize")]
+ public byte[] TxSize { get; set; }
+ #endregion
/// <summary>
- /// Construct new item from provided transaction data.
+ /// Read transaction from file.
/// </summary>
- /// <param name="o"></param>
- public TxOutItem(CTransaction tx, uint nOut)
+ /// <param name="reader">Stream with read access.</param>
+ /// <param name="tx">CTransaction reference.</param>
+ /// <returns>Result</returns>
+ public bool ReadFromFile(ref Stream reader, long nBlockPos, out CTransaction tx)
{
- Contract.Requires<ArgumentException>(nOut < tx.vout.Length);
+ var buffer = new byte[CTransaction.nMaxTxSize];
+
+ tx = null;
- long nMerkleId = 0;
- if (!outMap.TryGetValue(tx.Hash, out nMerkleId))
+ try
{
- // Not in the blockchain
- nMerkleNodeID = -1;
- }
+ reader.Seek(nBlockPos + nTxOffset, SeekOrigin.Begin); // Seek to transaction offset
+
+ if (nTxSize != reader.Read(buffer, 0, nTxSize))
+ {
+ return false;
+ }
- OutputNumber = VarInt.EncodeVarInt(nOut);
- OutputValue = VarInt.EncodeVarInt(tx.vout[nOut].nValue);
- scriptPubKey = tx.vout[nOut].scriptPubKey;
+ tx = new CTransaction(buffer);
- if (tx.IsCoinBase)
+ return true;
+ }
+ catch (IOException)
{
- outputFlags |= OutputType.TX_COINBASE;
+ // I/O error
+ return false;
}
- else if (tx.IsCoinStake)
+ catch (TransactionConstructorException)
{
- outputFlags |= OutputType.TX_COINSTAKE;
+ // Constructor error
+ return false;
}
}
/// <summary>
- /// Getter for output number.
+ /// Transaction offset accessor
/// </summary>
[Ignore]
- public uint nOut
+ public long nTxOffset
{
- get { return (uint)VarInt.DecodeVarInt(OutputNumber); }
+ get { return (long) VarInt.DecodeVarInt(TxOffset); }
+ private set { TxOffset = VarInt.EncodeVarInt(value); }
}
/// <summary>
- /// Getter for output value.
+ /// Transaction size accessor
/// </summary>
[Ignore]
- public ulong nValue
+ public int nTxSize
{
- get { return VarInt.DecodeVarInt(OutputValue); }
+ get { return (int)VarInt.DecodeVarInt(TxSize); }
+ private set { TxSize = VarInt.EncodeVarInt(value); }
}
- /// <summary>
- /// Is this a user transaction output?
- /// </summary>
- [Ignore]
- public bool IsUser
+ public CMerkleNode(CTransaction tx)
{
- get { return (outputFlags & OutputType.TX_USER) != 0; }
- }
+ nTxOffset = -1;
+ nParentBlockID = -1;
- /// <summary>
- /// Is this a coinbase transaction output?
- /// </summary>
- [Ignore]
- public bool IsCoinBase
- {
- get { return (outputFlags & OutputType.TX_COINBASE) != 0; }
- }
+ nTxSize = tx.Size;
+ TransactionHash = tx.Hash;
- /// <summary>
- /// Is this a coinstake transaction output?
- /// </summary>
- [Ignore]
- public bool IsCoinStake
- {
- get { return (outputFlags & OutputType.TX_COINSTAKE) != 0; }
+ if (tx.IsCoinBase)
+ {
+ TransactionFlags |= TxFlags.TX_COINBASE;
+ }
+ else if (tx.IsCoinStake)
+ {
+ TransactionFlags |= TxFlags.TX_COINSTAKE;
+ }
+ else
+ {
+ TransactionFlags |= TxFlags.TX_USER;
+ }
}
- /// <summary>
- /// Getter ans setter for IsSpent flag.
- /// </summary>
- [Ignore]
- public bool IsSpent
+ public CMerkleNode(long nBlockId, long nOffset, CTransaction tx)
{
- get { return (outputFlags & OutputType.TX_SPENT) != 0; }
- set { outputFlags |= value ? OutputType.TX_SPENT : OutputType.TX_AVAILABLE; }
+ nParentBlockID = nBlockId;
+
+ nTxOffset = nOffset;
+ nTxSize = tx.Size;
+ TransactionHash = tx.Hash;
+
+ if (tx.IsCoinBase)
+ {
+ TransactionFlags |= TxFlags.TX_COINBASE;
+ }
+ else if (tx.IsCoinStake)
+ {
+ TransactionFlags |= TxFlags.TX_COINSTAKE;
+ }
+ else
+ {
+ TransactionFlags |= TxFlags.TX_USER;
+ }
}
- }
+ }
- [Table("TransactionStorage")]
- public class CTransactionStoreItem
+ [Table("Outputs")]
+ public class TxOutItem : ITxOutItem
{
/// <summary>
- /// Transaction hash
+ /// Reference to transaction item.
/// </summary>
- [PrimaryKey]
- public byte[] TransactionHash { get; set; }
+ [ForeignKey(typeof(CMerkleNode), Name = "nMerkleNodeID")]
+ public long nMerkleNodeID { get; set; }
/// <summary>
- /// Block hash
+ /// Output flags
/// </summary>
- [ForeignKey(typeof(CBlockStoreItem), Name = "Hash")]
- public byte[] BlockHash { get; set; }
+ public OutputFlags outputFlags { get; set; }
/// <summary>
- /// Transaction type flag
+ /// Output number in VarInt format.
/// </summary>
- public TxType txType { get; set; }
+ public byte[] OutputNumber { get; set; }
/// <summary>
- /// Tx position in file
+ /// Output value in VarInt format.
/// </summary>
- public long nTxPos { get; set; }
+ public byte[] OutputValue { get; set; }
/// <summary>
- /// Transaction size
+ /// Second half of script which contains spending instructions.
/// </summary>
- public int nTxSize { get; set; }
+ public byte[] scriptPubKey { get; set; }
/// <summary>
- /// Serialized output array
+ /// Getter for output number.
/// </summary>
- public byte[] vOut { get; set; }
+ [Ignore]
+ public uint nOut
+ {
+ get { return (uint)VarInt.DecodeVarInt(OutputNumber); }
+ private set { OutputNumber = VarInt.EncodeVarInt(value); }
+ }
/// <summary>
- /// Read transaction from file.
+ /// Getter for output value.
/// </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)
+ [Ignore]
+ public ulong nValue
{
- var buffer = new byte[CTransaction.nMaxTxSize];
- 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;
- }
+ get { return VarInt.DecodeVarInt(OutputValue); }
+ private set { OutputValue = VarInt.EncodeVarInt(value); }
}
/// <summary>
- /// Outputs array access
+ /// Getter ans setter for IsSpent flag.
/// </summary>
[Ignore]
- public CTxOut[] Outputs {
- get { return CTxOut.DeserializeOutputsArray(vOut); }
- set { vOut = CTxOut.SerializeOutputsArray(value); }
+ public bool IsSpent
+ {
+ get { return (outputFlags & OutputFlags.SPENT) != 0; }
+ set { outputFlags |= value ? OutputFlags.SPENT : OutputFlags.AVAILABLE; }
+ }
+
+ public TxOutItem(CTxOut o, uint nOut)
+ {
+ nValue = o.nValue;
+ scriptPubKey = o.scriptPubKey;
+ this.nOut = nOut;
}
}
private SQLiteConnection dbConn;
/// <summary>
+ /// Current SQLite platform
+ /// </summary>
+ private ISQLitePlatform dbPlatform;
+
+ /// <summary>
/// Block file.
/// </summary>
private string strBlockFile;
/// <summary>
/// Map of block tree nodes.
+ ///
+ /// blockHash => CBlockStoreItem
/// </summary>
private ConcurrentDictionary<uint256, CBlockStoreItem> blockMap = new ConcurrentDictionary<uint256, CBlockStoreItem>();
private ConcurrentDictionary<uint256, CBlock> orphanMapByPrev = new ConcurrentDictionary<uint256, CBlock>();
/// <summary>
- /// Map of unspent items.
+ /// Unconfirmed transactions.
+ ///
+ /// TxID => Transaction
/// </summary>
- private ConcurrentDictionary<uint256, CTransactionStoreItem> txMap = new ConcurrentDictionary<uint256, CTransactionStoreItem>();
-
+ private ConcurrentDictionary<uint256, CTransaction> mapUnconfirmedTx = new ConcurrentDictionary<uint256, CTransaction>();
+
/// <summary>
/// Map of the proof-of-stake hashes. This is necessary for stake duplication checks.
/// </summary>
private ConcurrentDictionary<COutPoint, uint> mapStakeSeenOrphan = new ConcurrentDictionary<COutPoint, uint>();
/// <summary>
- /// Unconfirmed transactions.
- /// </summary>
- private ConcurrentDictionary<uint256, CTransaction> mapUnconfirmedTx = new ConcurrentDictionary<uint256, CTransaction>();
-
- /// <summary>
/// Trust score for the longest chain.
/// </summary>
private uint256 nBestChainTrust = 0;
/// Block file stream with read/write access
/// </summary>
private Stream fStreamReadWrite;
+ private uint nBestHeight;
+ private uint nTimeBestReceived;
+ private int nTransactionsUpdated;
/// <summary>
/// Init the block storage manager.
strBlockFile = BlockFile;
bool firstInit = !File.Exists(strDbFile);
- dbConn = new SQLiteConnection(new SQLitePlatformGeneric(), strDbFile);
+ dbPlatform = new SQLitePlatformGeneric();
+ dbConn = new SQLiteConnection(dbPlatform, strDbFile);
fStreamReadWrite = File.Open(strBlockFile, FileMode.OpenOrCreate, FileAccess.ReadWrite);
{
// Create tables
dbConn.CreateTable<CBlockStoreItem>(CreateFlags.AutoIncPK);
- dbConn.CreateTable<CTransactionStoreItem>(CreateFlags.ImplicitPK);
+ dbConn.CreateTable<CMerkleNode>(CreateFlags.AutoIncPK);
+ dbConn.CreateTable<TxOutItem>(CreateFlags.ImplicitPK);
var genesisBlock = new CBlock(
Interop.HexToArray(
}
}
- public bool GetTransaction(uint256 TxID, ref CTransaction tx)
+ public bool GetTxOutCursor(COutPoint outpoint, ref TxOutItem txOutCursor)
{
- var reader = new BinaryReader(fStreamReadWrite).BaseStream;
- var QueryTx = dbConn.Query<CTransactionStoreItem>("select * from [TransactionStorage] where [TransactionHash] = ?", (byte[])TxID);
+ 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);
- if (QueryTx.Count == 1)
+ if (queryResults.Count == 1)
{
- return QueryTx[0].ReadFromFile(ref reader, out tx);
+ txOutCursor = queryResults[0];
+
+ return true;
}
// Tx not found
return false;
}
+ interface InputsJoin : ITxOutItem
+ {
+ byte[] TransactionHash { get; set; }
+ }
+
+ public bool FetchInputs(CTransaction tx, ref Dictionary<COutPoint, TxOutItem> queued, ref Dictionary<COutPoint, TxOutItem> inputs, bool IsBlock, out bool Invalid)
+ {
+ Invalid = false;
+
+ if (tx.IsCoinBase)
+ {
+ // Coinbase transactions have no inputs to fetch.
+ return true;
+ }
+
+ 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++)
+ {
+ 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());
+
+ foreach (var item in queryResults)
+ {
+ if (item.IsSpent)
+ {
+ return false; // Already spent
+ }
+
+ var inputsKey = new COutPoint(item.TransactionHash, item.nOut);
+
+ item.IsSpent = true;
+
+ // Add output data to dictionary
+ inputs.Add(inputsKey, (TxOutItem) item);
+ }
+
+ if (queryResults.Count < tx.vin.Length)
+ {
+ if (IsBlock)
+ {
+ // It seems that some transactions are being spent in the same block.
+
+ foreach (var txin in tx.vin)
+ {
+ var outPoint = txin.prevout;
+
+ if (!queued.ContainsKey(outPoint))
+ {
+ return false; // No such transaction
+ }
+
+ // Add output data to dictionary
+ inputs.Add(outPoint, queued[outPoint]);
+
+ // Mark output as spent
+ queued[outPoint].IsSpent = true;
+ }
+ }
+ else
+ {
+ // Unconfirmed transaction
+
+ foreach (var txin in tx.vin)
+ {
+ var outPoint = txin.prevout;
+ CTransaction txPrev;
+
+ if (!mapUnconfirmedTx.TryGetValue(outPoint.hash, out txPrev))
+ {
+ return false; // No such transaction
+ }
+
+ if (outPoint.n > txPrev.vout.Length)
+ {
+ Invalid = true;
+
+ return false; // nOut is out of range
+ }
+
+ // TODO: return inputs from map
+ throw new NotImplementedException();
+
+ }
+
+ return false;
+ }
+ }
+
+ return true;
+ }
+
private bool AddItemToIndex(ref CBlockStoreItem itemTemplate, ref CBlock block)
{
var writer = new BinaryWriter(fStreamReadWrite).BaseStream;
return false;
}
- if (dbConn.Insert(itemTemplate) == 0 || !blockMap.TryAdd(blockHash, itemTemplate))
+ if (dbConn.Insert(itemTemplate) == 0)
{
- return false;
+ return false; // Insert failed
+ }
+
+ // Get last RowID.
+ itemTemplate.ItemID = dbPlatform.SQLiteApi.LastInsertRowid(dbConn.Handle);
+
+ if (!blockMap.TryAdd(blockHash, itemTemplate))
+ {
+ return false; // blockMap add failed
}
if (itemTemplate.nChainTrust > nBestChainTrust)
{
// New best chain
- // TODO: SetBestChain implementation
-
- /*
if (!SetBestChain(ref itemTemplate))
{
return false; // SetBestChain failed.
}
- */
- }
-
- // We have no SetBestChain and ConnectBlock/Disconnect block yet, so adding these transactions manually.
- for (int i = 0; i < block.vtx.Length; i++)
- {
- // Handle trasactions using our temporary stub algo
-
- if (!block.vtx[i].VerifyScripts())
- {
- return false;
- }
-
- var nTxOffset = itemTemplate.nBlockPos + 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 = blockHash,
- nTxPos = nTxOffset,
- nTxSize = block.vtx[i].Size,
- txType = txnType
- };
-
- dbConn.Insert(NewTxItem);
}
return true;
private bool SetBestChain(ref CBlockStoreItem cursor)
{
- dbConn.BeginTransaction();
-
uint256 hashBlock = cursor.Hash;
- if (genesisBlockCursor == null && hashBlock == NetUtils.nHashGenesisBlock)
+ if (genesisBlockCursor == null && hashBlock == NetInfo.nHashGenesisBlock)
{
genesisBlockCursor = cursor;
}
else
{
// the first block in the new chain that will cause it to become the new best chain
- CBlockStoreItem cursorIntermediate = cursor;
+ var cursorIntermediate = cursor;
// list of blocks that need to be connected afterwards
- List<CBlockStoreItem> secondary = new List<CBlockStoreItem>();
+ var secondary = new List<CBlockStoreItem>();
// 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
// Switch to new best branch
if (!Reorganize(cursorIntermediate))
{
- dbConn.Rollback();
InvalidChainFound(cursor);
return false; // reorganize failed
}
+ // Connect further blocks
+ foreach (var currentCursor in secondary)
+ {
+ CBlock block;
+ if (!currentCursor.ReadFromFile(ref fStreamReadWrite, out block))
+ {
+ // ReadFromDisk failed
+ break;
+ }
+ // errors now are not fatal, we still did a reorganisation to a new chain in a valid way
+ if (!SetBestChainInner(currentCursor))
+ {
+ break;
+ }
+ }
}
+ nHashBestChain = cursor.Hash;
+ bestBlockCursor = cursor;
+ nBestHeight = cursor.nHeight;
+ nBestChainTrust = cursor.nChainTrust;
+ nTimeBestReceived = Interop.GetTime();
+ nTransactionsUpdated++;
- throw new NotImplementedException();
+ return true;
}
private void InvalidChainFound(CBlockStoreItem cursor)
private bool Reorganize(CBlockStoreItem cursorIntermediate)
{
+ // Find the fork
+ var fork = bestBlockCursor;
+ var longer = cursorIntermediate;
+
+ while (fork.ItemID != longer.ItemID)
+ {
+ while (longer.nHeight > fork.nHeight)
+ {
+ if ((longer = longer.prev) == null)
+ {
+ return false; // longer.prev is null
+ }
+ }
+
+ if (fork.ItemID == longer.ItemID)
+ {
+ break;
+ }
+
+ if ((fork = fork.prev) == null)
+ {
+ return false; // fork.prev is null
+ }
+ }
+
+ // List of what to disconnect
+ var disconnect = new List<CBlockStoreItem>();
+ for (var cursor = bestBlockCursor; cursor.ItemID != fork.ItemID; cursor = cursor.prev)
+ {
+ disconnect.Add(cursor);
+ }
+
+ // 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)
+ {
+ txResurrect.Add(tx);
+ }
+ }
+ }
+
+
+ // Connect longer branch
+ var txDelete = new List<CTransaction>();
+ foreach (var cursor in connect)
+ {
+ CBlock block;
+ if (!cursor.ReadFromFile(ref fStreamReadWrite, out block))
+ {
+ return false; // ReadFromDisk for connect failed
+ }
+
+ if (!ConnectBlock(cursor, ref block))
+ {
+ // Invalid block
+ return false; // ConnectBlock failed
+ }
+
+ // Queue memory transactions to delete
+ foreach (var tx in block.vtx)
+ {
+ txDelete.Add(tx);
+ }
+ }
+
+ if (!WriteHashBestChain(cursorIntermediate.Hash))
+ {
+ return false; // WriteHashBestChain failed
+ }
+
+ // Make sure it's successfully written to disk
+ dbConn.Commit();
+
+ // Resurrect memory transactions that were in the disconnected branch
+ foreach (var tx in txResurrect)
+ {
+ mapUnconfirmedTx.TryAdd(tx.Hash, tx);
+ }
+
+ // Delete redundant memory transactions that are in the connected branch
+ foreach (var tx in txDelete)
+ {
+ CTransaction dummy;
+ mapUnconfirmedTx.TryRemove(tx.Hash, out dummy);
+ }
+
+ return true; // Done
+ }
+
+ private bool DisconnectBlock(CBlockStoreItem blockCursor, ref CBlock block)
+ {
throw new NotImplementedException();
}
{
uint256 hash = cursor.Hash;
CBlock block;
+ if (!cursor.ReadFromFile(ref fStreamReadWrite, out block))
+ {
+ return false; // Unable to read block from file.
+ }
// Adding to current best branch
- if (!ConnectBlock(cursor, false, out block) || !WriteHashBestChain(hash))
+ if (!ConnectBlock(cursor, ref block) || !WriteHashBestChain(hash))
{
- dbConn.Rollback();
InvalidChainFound(cursor);
return false;
}
return true;
}
- private bool ConnectBlock(CBlockStoreItem cursor, bool fJustCheck, out CBlock block)
+ private bool ConnectBlock(CBlockStoreItem cursor, ref CBlock block, bool fJustCheck=false)
{
- var reader = new BinaryReader(fStreamReadWrite).BaseStream;
- if (cursor.ReadFromFile(ref reader, out block))
- {
- return false; // Unable to read block from file.
- }
-
// 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; // Invalid block found.
}
+ bool fScriptChecks = cursor.nHeight >= Checkpoints.TotalBlocksEstimate;
+ var scriptFlags = scriptflag.SCRIPT_VERIFY_NOCACHE | scriptflag.SCRIPT_VERIFY_P2SH;
+
+ ulong nFees = 0;
+ ulong nValueIn = 0;
+ ulong nValueOut = 0;
+ uint nSigOps = 0;
+
+ var queuedMerkleNodes = new Dictionary<uint256, CMerkleNode>();
+ var queued = new Dictionary<COutPoint, TxOutItem>();
+
+ for (var nTx = 0; nTx < block.vtx.Length; nTx++)
+ {
+ 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(tx.vout[i], i);
+
+ outData.IsSpent = false;
+
+ queued.Add(outKey, outData);
+ }
+ }
+
+ if (!block.IsProofOfStake)
+ {
+ ulong nBlockReward = CBlock.GetProofOfWorkReward(cursor.nBits, nFees);
+
+ // Check coinbase reward
+ if (block.vtx[0].nValueOut > nBlockReward)
+ {
+ return false; // coinbase reward exceeded
+ }
+ }
+
+ cursor.nMint = (long) (nValueOut - nValueIn + nFees);
+ cursor.nMoneySupply = (cursor.prev != null ? cursor.prev.nMoneySupply : 0) + (long)nValueOut - (long)nValueIn;
+
+ if (!UpdateDBCursor(ref cursor))
+ {
+ return false; // Unable to commit changes
+ }
+
+ if (fJustCheck)
+ {
+ return true;
+ }
+
+ // 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 (actualMerkleNodes.ContainsKey(txID))
+ {
+ merkleNode = actualMerkleNodes[txID];
+ }
+ else
+ {
+ merkleNode = queuedMerkleNodes[txID];
+ if (!SaveMerkleNode(ref merkleNode))
+ {
+ // Unable to save merkle tree cursor.
+ return false;
+ }
+ actualMerkleNodes.Add(txID, merkleNode);
+ }
+
+ var outItem = outPair.Value;
+ outItem.nMerkleNodeID = merkleNode.nMerkleNodeID;
+
+ queuedOutpointItems.Add(outItem);
+ }
+
+ if (!SaveOutpoints(ref queuedOutpointItems))
+ {
+ return false; // Unable to save outpoints
+ }
+
// TODO: the remaining stuff lol :D
throw new NotImplementedException();
}
+ /// <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();
+ }
+
private bool WriteHashBestChain(uint256 hash)
{
throw new NotImplementedException();
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);
+ }
+
+
+ /// <summary>
+ /// Interface for join
+ /// </summary>
+ interface IBlockJoinMerkle : IBlockStorageItem, IMerkleNode
+ {
}
+ /// <summary>
+ /// Get block and transaction by transaction hash.
+ /// </summary>
+ /// <param name="TxID">Transaction hash</param>
+ /// <param name="block">Block reference</param>
+ /// <param name="tx">Transaction reference</param>
+ /// <param name="nBlockPos">Block position reference</param>
+ /// <param name="nTxPos">Transaction position reference</param>
+ /// <returns>Result of operation</returns>
public bool GetBlockByTransactionID(uint256 TxID, ref CBlock block, ref CTransaction tx, ref long nBlockPos, ref long nTxPos)
{
- var QueryTx = dbConn.Query<CTransactionStoreItem>("select * from [TransactionStorage] where [TransactionHash] = ?", (byte[])TxID);
+ var queryResult = dbConn.Query<IBlockJoinMerkle>("select * 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 = (CBlockStoreItem) queryResult[0];
+ CMerkleNode txCursor = (CMerkleNode)queryResult[0];
+
+ var reader = new BinaryReader(fStreamReadWrite).BaseStream;
+
+ if (!txCursor.ReadFromFile(ref reader, blockCursor.nBlockPos, out tx))
+ {
+ return false; // Unable to read transaction
+ }
+
+ return blockCursor.ReadFromFile(ref reader, 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);
if (QueryBlockCursor.Count == 1)
{
- blockMap.TryAdd(blockHash, QueryBlockCursor[0]);
-
return QueryBlockCursor[0];
}
/// <summary>
/// Update cursor in memory and on disk.
/// </summary>
- /// <param name="originalItem">Original cursor</param>
- /// <param name="newItem">New cursor</param>
- /// <returns></returns>
- public bool UpdateCursor(CBlockStoreItem originalItem, ref CBlockStoreItem newItem)
+ /// <param name="cursor">Block cursor</param>
+ /// <returns>Result</returns>
+ public bool UpdateMapCursor(CBlockStoreItem cursor)
{
- if (blockMap.TryUpdate(originalItem.Hash, newItem, originalItem))
- {
- return dbConn.Update(newItem) != 0;
- }
+ var original = blockMap[cursor.Hash];
+ return blockMap.TryUpdate(cursor.Hash, cursor, original);
+ }
- return false;
+ /// <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)
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