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.Diagnostics.Contracts;
using System.Text;
+using System.Diagnostics.Contracts;
+using System.Linq;
namespace Novacoin
{
- [Table("ChainState")]
- public class ChainState
- {
- [PrimaryKey, AutoIncrement]
- public long itemId { get; set; }
-
- /// <summary>
- /// Hash of top block in the best chain
- /// </summary>
- public byte[] HashBestChain { get; set; }
-
- /// <summary>
- /// Total trust score of best chain
- /// </summary>
- public byte[] BestChainTrust { get; set; }
-
- public uint nBestHeight { get; set;}
-
- [Ignore]
- public uint256 nBestChainTrust
- {
- get { return BestChainTrust; }
- set { BestChainTrust = value; }
- }
-
- [Ignore]
- public uint256 nHashBestChain
- {
- get { return HashBestChain; }
- set { HashBestChain = value; }
- }
- }
-
- [Table("BlockStorage")]
- public class CBlockStoreItem : IBlockStorageItem
- {
- #region IBlockStorageItem
- /// <summary>
- /// Item ID in the database
- /// </summary>
- [PrimaryKey, AutoIncrement]
- public long ItemID { get; set; }
-
- /// <summary>
- /// PBKDF2+Salsa20 of block hash
- /// </summary>
- [Unique]
- public byte[] Hash { get; set; }
-
- /// <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, encoded in VarInt format
- /// </summary>
- [Column("nHeight")]
- public uint nHeight { get; set; }
-
- /// <summary>
- /// 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>
- [Ignore]
- public long nBlockPos
- {
- get { return (long)VarInt.DecodeVarInt(BlockPos); }
- set { BlockPos = VarInt.EncodeVarInt(value); }
- }
-
- /// <summary>
- /// Accessor and mutator for BlockSize value.
- /// </summary>
- [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.
- /// </summary>
- /// <param name="header">Block header</param>
- /// <returns>Header hash</returns>
- public uint256 FillHeader(CBlockHeader header)
- {
- uint256 _hash = header.Hash;
-
- Hash = _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 = prevHash;
- header.merkleRoot = 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 (BlockException)
- {
- // Constructor exception
- return false;
- }
- }
-
- /// <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;
-
- var magicBytes = BitConverter.GetBytes(CBlockStore.nMagicNumber);
- var blkLenBytes = BitConverter.GetBytes(blockBytes.Length);
-
- // 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);
-
- // Save block size and current position in the block cursor fields.
- nBlockPos = writer.Position;
- nBlockSize = blockBytes.Length;
-
- // Write block and flush the stream.
- writer.Write(blockBytes, 0, blockBytes.Length);
- writer.Flush();
-
- return true;
- }
- catch (IOException)
- {
- // I/O error
- return false;
- }
- catch (Exception)
- {
- // Some serialization error
- return false;
- }
- }
-
- /// <summary>
- /// Previous block cursor
- /// </summary>
- [Ignore]
- public CBlockStoreItem prev
- {
- get { return CBlockStore.Instance.GetMapCursor(prevHash); }
- }
-
- /// <summary>
- /// Next block cursor
- /// </summary>
- [Ignore]
- public CBlockStoreItem next
- {
- get
- {
- if (nextHash == null)
- {
- return null;
- }
-
- return CBlockStore.Instance.GetMapCursor(nextHash);
- }
- set
- {
- nextHash = value.Hash;
-
- CBlockStore.Instance.UpdateMapCursor(this);
- }
- }
-
- [Ignore]
- bool IsInMainChain
- {
- get { return (next != null); }
- }
-
- /// <summary>
- /// STake modifier generation flag
- /// </summary>
- [Ignore]
- public bool GeneratedStakeModifier
- {
- get { return (BlockTypeFlag & BlockType.BLOCK_STAKE_MODIFIER) != 0; }
- }
-
- /// <summary>
- /// Stake entropy bit
- /// </summary>
- [Ignore]
- public uint StakeEntropyBit
- {
- get { return ((uint)(BlockTypeFlag & BlockType.BLOCK_STAKE_ENTROPY) >> 1); }
- }
-
- /// <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;
- }
-
- /// <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;
- }
-
- /// <summary>
- /// Set proof-of-stake flag.
- /// </summary>
- public void SetProofOfStake()
- {
- BlockTypeFlag |= BlockType.BLOCK_PROOF_OF_STAKE;
- }
-
- /// <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
- {
- get { return (BlockTypeFlag & BlockType.BLOCK_PROOF_OF_STAKE) != 0; }
- }
-
- /// <summary>
- /// Block trust score.
- /// </summary>
- [Ignore]
- public uint256 nBlockTrust
- {
- get
- {
- uint256 nTarget = 0;
- nTarget.Compact = nBits;
-
- /* Old protocol */
- if (nTime < NetInfo.nChainChecksSwitchTime)
- {
- return IsProofOfStake ? (new uint256(1) << 256) / (nTarget + 1) : 1;
- }
-
- /* New protocol */
-
- // Calculate work amount for block
- 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;
-
- // Return nPoWTrust for the first 12 blocks
- if (prev == null || prev.nHeight < 12)
- return nPoWTrust;
-
- CBlockStoreItem currentIndex = prev;
-
- if (IsProofOfStake)
- {
- var nNewTrust = (new uint256(1) << 256) / (nTarget + 1);
-
- // Return 1/3 of score if parent block is not the PoW block
- if (!prev.IsProofOfWork)
- {
- return nNewTrust / 3;
- }
-
- int nPoWCount = 0;
-
- // Check last 12 blocks type
- while (prev.nHeight - currentIndex.nHeight < 12)
- {
- if (currentIndex.IsProofOfWork)
- {
- nPoWCount++;
- }
- currentIndex = currentIndex.prev;
- }
-
- // Return 1/3 of score if less than 3 PoW blocks found
- if (nPoWCount < 3)
- {
- return nNewTrust / 3;
- }
-
- return nNewTrust;
- }
- else
- {
- var nLastBlockTrust = prev.nChainTrust - prev.prev.nChainTrust;
-
- // Return nPoWTrust + 2/3 of previous block score if two parent blocks are not PoS blocks
- if (!prev.IsProofOfStake || !prev.prev.IsProofOfStake)
- {
- return nPoWTrust + (2 * nLastBlockTrust / 3);
- }
-
- int nPoSCount = 0;
-
- // Check last 12 blocks type
- while (prev.nHeight - currentIndex.nHeight < 12)
- {
- if (currentIndex.IsProofOfStake)
- {
- nPoSCount++;
- }
- 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);
- }
-
- nTarget.Compact = prev.nBits;
-
- if (!nTarget)
- {
- return 0;
- }
-
- var nNewTrust = (new uint256(1) << 256) / (nTarget + 1);
-
- // Return nPoWTrust + full trust score for previous block nBits
- return nPoWTrust + nNewTrust;
- }
- }
- }
-
- /// <summary>
- /// Stake modifier checksum.
- /// </summary>
- public uint nStakeModifierChecksum;
-
- /// <summary>
- /// Chain trust score
- /// </summary>
- [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>
- /// 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 TxFlags : byte
- {
- TX_COINBASE,
- TX_COINSTAKE,
- TX_USER
- }
-
- /// <summary>
- /// Output flags.
- /// </summary>
- public enum OutputFlags : byte
- {
- AVAILABLE, // Unspent output
- SPENT // Spent output
- }
-
- [Table("MerkleNodes")]
- public class CMerkleNode : IMerkleNode
- {
- #region IMerkleNode
- /// <summary>
- /// Node identifier
- /// </summary>
- [PrimaryKey, AutoIncrement]
- public long nMerkleNodeID { get; set; }
-
- /// <summary>
- /// Reference to parent block database item.
- /// </summary>
- [ForeignKey(typeof(CBlockStoreItem), Name = "ItemId")]
- public long nParentBlockID { get; set; }
-
- /// <summary>
- /// Transaction type flag
- /// </summary>
- [Column("TransactionFlags")]
- public TxFlags TransactionFlags { get; set; }
-
- /// <summary>
- /// Transaction hash
- /// </summary>
- [Column("TransactionHash")]
- public byte[] TransactionHash { get; set; }
-
- /// <summary>
- /// Transaction offset from the beginning of block header, encoded in VarInt format.
- /// </summary>
- [Column("TxOffset")]
- public byte[] TxOffset { get; set; }
-
- /// <summary>
- /// Transaction size, encoded in VarInt format.
- /// </summary>
- [Column("TxSize")]
- public byte[] TxSize { get; set; }
- #endregion
-
- /// <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, long nBlockPos, out CTransaction tx)
- {
- var buffer = new byte[CTransaction.nMaxTxSize];
-
- tx = null;
-
- try
- {
- reader.Seek(nBlockPos + nTxOffset, 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>
- /// Transaction offset accessor
- /// </summary>
- [Ignore]
- public long nTxOffset
- {
- get { return (long) VarInt.DecodeVarInt(TxOffset); }
- private set { TxOffset = VarInt.EncodeVarInt(value); }
- }
-
- /// <summary>
- /// Transaction size accessor
- /// </summary>
- [Ignore]
- public int nTxSize
- {
- get { return (int)VarInt.DecodeVarInt(TxSize); }
- private set { TxSize = VarInt.EncodeVarInt(value); }
- }
-
- public CMerkleNode(CTransaction tx)
- {
- nTxOffset = -1;
- nParentBlockID = -1;
-
- 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;
- }
- }
-
- public CMerkleNode(long nBlockId, long nOffset, CTransaction tx)
- {
- 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("Outputs")]
- public class TxOutItem : ITxOutItem
- {
- /// <summary>
- /// Reference to transaction item.
- /// </summary>
- [ForeignKey(typeof(CMerkleNode), Name = "nMerkleNodeID")]
- public long nMerkleNodeID { get; set; }
-
- /// <summary>
- /// Output flags
- /// </summary>
- public OutputFlags outputFlags { get; set; }
-
- /// <summary>
- /// Output number in VarInt format.
- /// </summary>
- public byte[] OutputNumber { get; set; }
-
- /// <summary>
- /// Output value in VarInt format.
- /// </summary>
- public byte[] OutputValue { get; set; }
-
- /// <summary>
- /// Second half of script which contains spending instructions.
- /// </summary>
- public byte[] scriptPubKey { get; set; }
-
- /// <summary>
- /// Getter for output number.
- /// </summary>
- [Ignore]
- public uint nOut
- {
- get { return (uint)VarInt.DecodeVarInt(OutputNumber); }
- private set { OutputNumber = VarInt.EncodeVarInt(value); }
- }
-
- /// <summary>
- /// Getter for output value.
- /// </summary>
- [Ignore]
- public ulong nValue
- {
- get { return VarInt.DecodeVarInt(OutputValue); }
- private set { OutputValue = VarInt.EncodeVarInt(value); }
- }
-
- /// <summary>
- /// Getter ans setter for IsSpent flag.
- /// </summary>
- [Ignore]
- 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;
- }
- }
-
public class CBlockStore : IDisposable
{
public const uint nMagicNumber = 0xe5e9e8e4;
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;
+ 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),
+ 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)
));
}
return false; // Already spent
}
- var inputsKey = new COutPoint(item.TransactionHash, item.nOut);
+ var inputsKey = new COutPoint(item.TransactionHash, item.nOut);
item.IsSpent = true;
// Add output data to dictionary
- inputs.Add(inputsKey, (TxOutItem) item);
+ inputs.Add(inputsKey, (TxOutItem)item);
}
if (queryResults.Count < tx.vin.Length)
inputs.Add(outPoint, queued[outPoint]);
// Mark output as spent
- queued[outPoint].IsSpent = true;
+ queued[outPoint].IsSpent = true;
}
}
else
return false; // nOut is out of range
}
-
+
// TODO: return inputs from map
throw new NotImplementedException();
private bool AddItemToIndex(ref CBlockStoreItem itemTemplate, ref CBlock block)
{
- var writer = new BinaryWriter(fStreamReadWrite).BaseStream;
uint256 blockHash = itemTemplate.Hash;
if (blockMap.ContainsKey(blockHash))
return false;
}
+ // Begin transaction
+ dbConn.BeginTransaction();
+
// Compute chain trust score
itemTemplate.nChainTrust = (itemTemplate.prev != null ? itemTemplate.prev.nChainTrust : 0) + itemTemplate.nBlockTrust;
itemTemplate.nStakeTime = block.vtx[1].nTime;
}
- if (!itemTemplate.WriteToFile(ref writer, ref block))
+ if (!itemTemplate.WriteToFile(ref fStreamReadWrite, ref block))
{
return false;
}
// Get last RowID.
itemTemplate.ItemID = dbPlatform.SQLiteApi.LastInsertRowid(dbConn.Handle);
-
+
if (!blockMap.TryAdd(blockHash, itemTemplate))
{
return false; // blockMap add failed
}
}
+ // Commit transaction
+ dbConn.Commit();
+
return true;
}
return false; // UpdateTopChain 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)
{
// Add to current best branch
cursor.prev.next = cursor;
- dbConn.Commit();
-
// Delete redundant memory transactions
foreach (var tx in block.vtx)
{
return true;
}
- private bool ConnectBlock(CBlockStoreItem cursor, ref CBlock block, bool fJustCheck=false)
+ 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))
// 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);
+ nSigOps += tx.GetP2SHSigOpCount(ref inputs);
if (nSigOps > CBlock.nMaxSigOps)
{
return false; // too many sigops
}
- ulong nTxValueIn = tx.GetValueIn(inputs);
+ ulong nTxValueIn = tx.GetValueIn(ref inputs);
ulong nTxValueOut = tx.nValueOut;
nValueIn += nTxValueIn;
nFees += nTxValueIn - nTxValueOut;
}
- if (!ConnectInputs(tx, inputs, queued, cursor, fScriptChecks, scriptFlags))
+ if (!ConnectInputs(tx, ref inputs, ref queued, ref cursor, true, fScriptChecks, scriptFlags))
{
return false;
}
queuedMerkleNodes.Add(hashTx, mNode);
var outKey = new COutPoint(hashTx, i);
- var outData = new TxOutItem(tx.vout[i], i);
+ var outData = new TxOutItem();
+
+ outData.nValue = tx.vout[i].nValue;
+ outData.scriptPubKey = tx.vout[i].scriptPubKey;
+ outData.nOut = i;
+
outData.IsSpent = false;
}
}
- cursor.nMint = (long) (nValueOut - nValueIn + nFees);
+ cursor.nMint = (long)(nValueOut - nValueIn + nFees);
cursor.nMoneySupply = (cursor.prev != null ? cursor.prev.nMoneySupply : 0) + (long)nValueOut - (long)nValueIn;
if (!UpdateDBCursor(ref cursor))
// Write queued transaction changes
var actualMerkleNodes = new Dictionary<uint256, CMerkleNode>();
var queuedOutpointItems = new List<TxOutItem>();
- foreach(KeyValuePair<COutPoint, TxOutItem> outPair in queued)
+ foreach (KeyValuePair<COutPoint, TxOutItem> outPair in queued)
{
uint256 txID = outPair.Key.hash;
CMerkleNode merkleNode;
return true;
}
- private bool ConnectInputs(CTransaction tx, Dictionary<COutPoint, TxOutItem> inputs, Dictionary<COutPoint, TxOutItem> queued, CBlockStoreItem cursor, bool fScriptChecks, scriptflag scriptFlags)
+ private bool ConnectInputs(CTransaction tx, ref Dictionary<COutPoint, TxOutItem> inputs, ref Dictionary<COutPoint, TxOutItem> queued, ref CBlockStoreItem cursorBlock, bool fBlock, bool fScriptChecks, scriptflag scriptFlags)
{
- throw new NotImplementedException();
+ // Take over previous transactions' spent pointers
+ // fBlock is true when this is called from AcceptBlock when a new best-block is added to the blockchain
+ // fMiner is true when called from the internal bitcoin miner
+ // ... both are false when called from CTransaction::AcceptToMemoryPool
+
+ if (!tx.IsCoinBase)
+ {
+ ulong nValueIn = 0;
+ ulong nFees = 0;
+ for (uint i = 0; i < tx.vin.Length; i++)
+ {
+ var prevout = tx.vin[i].prevout;
+ Contract.Assert(inputs.ContainsKey(prevout));
+ var input = inputs[prevout];
+
+ CBlockStoreItem parentBlockCursor;
+ var merkleItem = GetMerkleCursor(input, out parentBlockCursor);
+
+ if (merkleItem == null)
+ {
+ return false; // Unable to find merkle node
+ }
+
+ // If prev is coinbase or coinstake, check that it's matured
+ if (merkleItem.IsCoinBase || merkleItem.IsCoinStake)
+ {
+ if (cursorBlock.nHeight - parentBlockCursor.nHeight < NetInfo.nGeneratedMaturity)
+ {
+ return false; // tried to spend non-matured generation input.
+ }
+ }
+
+ // check transaction timestamp
+ if (merkleItem.nTime > tx.nTime)
+ {
+ return false; // transaction timestamp earlier than input transaction
+ }
+
+ // Check for negative or overflow input values
+ nValueIn += input.nValue;
+ if (!CTransaction.MoneyRange(input.nValue) || !CTransaction.MoneyRange(nValueIn))
+ {
+ return false; // txin values out of range
+ }
+
+ }
+
+ // The first loop above does all the inexpensive checks.
+ // Only if ALL inputs pass do we perform expensive ECDSA signature checks.
+ // Helps prevent CPU exhaustion attacks.
+ for (int i = 0; i < tx.vin.Length; i++)
+ {
+ var prevout = tx.vin[i].prevout;
+ Contract.Assert(inputs.ContainsKey(prevout));
+ var input = inputs[prevout];
+
+ // Check for conflicts (double-spend)
+ if (input.IsSpent)
+ {
+ return false;
+ }
+
+ // Skip ECDSA signature verification when connecting blocks (fBlock=true)
+ // before the last blockchain checkpoint. This is safe because block merkle hashes are
+ // still computed and checked, and any change will be caught at the next checkpoint.
+ if (fScriptChecks)
+ {
+ // Verify signature
+ if (!ScriptCode.VerifyScript(tx.vin[i].scriptSig, input.scriptPubKey, tx, i, (int)scriptflag.SCRIPT_VERIFY_P2SH, 0))
+ {
+ return false; // VerifyScript failed.
+ }
+ }
+
+ // Mark outpoint as spent
+ input.IsSpent = true;
+ inputs[prevout] = input;
+
+ // Write back
+ if (fBlock)
+ {
+ queued.Add(prevout, input);
+ }
+ }
+
+ if (tx.IsCoinStake)
+ {
+ // ppcoin: coin stake tx earns reward instead of paying fee
+ ulong nCoinAge;
+ if (!tx.GetCoinAge(ref inputs, out nCoinAge))
+ {
+ return false; // unable to get coin age for coinstake
+ }
+
+ int nTxSize = (tx.nTime > NetInfo.nStakeValidationSwitchTime) ? tx.Size : 0;
+ ulong nReward = tx.nValueOut - nValueIn;
+
+ ulong nCalculatedReward = CBlock.GetProofOfStakeReward(nCoinAge, cursorBlock.nBits, tx.nTime) - CTransaction.GetMinFee(1, false, CTransaction.MinFeeMode.GMF_BLOCK, nTxSize) + CTransaction.nCent;
+
+ if (nReward > nCalculatedReward)
+ {
+ return false; // coinstake pays too much
+ }
+ }
+ else
+ {
+ if (nValueIn < tx.nValueOut)
+ {
+ return false; // value in < value out
+ }
+
+ // Tally transaction fees
+ ulong nTxFee = nValueIn - tx.nValueOut;
+ if (nTxFee < 0)
+ {
+ return false; // nTxFee < 0
+ }
+
+ nFees += nTxFee;
+
+ if (!CTransaction.MoneyRange(nFees))
+ {
+ return false; // nFees out of range
+ }
+ }
+
+ }
+
+ return true;
}
+
/// <summary>
/// Set new top node or current best chain.
/// </summary>
if (!AddItemToIndex(ref itemTemplate, ref block))
{
+ dbConn.Rollback();
+
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)
+ public bool GetBlockByTransactionID(uint256 TxID, ref CBlock block, ref long nBlockPos)
{
- var queryResult = dbConn.Query<IBlockJoinMerkle>("select * from [BlockStorage] b left join [MerkleNodes] m on (b.[ItemID] = m.[nParentBlockID]) where m.[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 (queryResult.Count == 1)
{
- 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
- }
+ CBlockStoreItem blockCursor = queryResult[0];
- return blockCursor.ReadFromFile(ref reader, out block);
+ return blockCursor.ReadFromFile(ref fStreamReadWrite, out block);
}
// Tx not found
return false;
}
- public bool WriteNodes(ref CMerkleNode[] merkleNodes)
- {
-
-
- return true;
- }
-
/// <summary>
/// Get block cursor from map.
/// </summary>
}
/// <summary>
+ /// Get merkle node cursor by output metadata.
+ /// </summary>
+ /// <param name="item">Output metadata object</param>
+ /// <returns>Merkle node cursor or null</returns>
+ public CMerkleNode GetMerkleCursor(TxOutItem item, out CBlockStoreItem blockCursor)
+ {
+ blockCursor = null;
+
+ // Trying to get cursor from the database.
+ var QueryMerkleCursor = dbConn.Query<CMerkleNode>("select * from [MerkleNodes] where [nMerkleNodeID] = ?", item.nMerkleNodeID);
+
+ if (QueryMerkleCursor.Count == 1)
+ {
+ var merkleNode = QueryMerkleCursor[0];
+
+ // Search for block
+ var results = blockMap.Where(x => x.Value.ItemID == merkleNode.nParentBlockID).Select(x => x.Value).ToArray();
+
+ blockCursor = results[0];
+ }
+
+ // Nothing found.
+ return null;
+ }
+
+ /// <summary>
/// Load cursor from database.
/// </summary>
/// <param name="blockHash">Block hash</param>
var intBuffer = new byte[4];
var fStream2 = File.OpenRead(BlockFile);
- var readerForBlocks = new BinaryReader(fStream2).BaseStream;
- readerForBlocks.Seek(nOffset, SeekOrigin.Begin); // Seek to previous offset + previous block length
+ fStream2.Seek(nOffset, SeekOrigin.Begin); // Seek to previous offset + previous block length
- while (readerForBlocks.Read(buffer, 0, 4) == 4) // Read magic number
+ while (fStream2.Read(buffer, 0, 4) == 4) // Read magic number
{
var nMagic = BitConverter.ToUInt32(buffer, 0);
if (nMagic != 0xe5e9e8e4)
throw new Exception("Incorrect magic number.");
}
- var nBytesRead = readerForBlocks.Read(buffer, 0, 4);
+ var nBytesRead = fStream2.Read(buffer, 0, 4);
if (nBytesRead != 4)
{
throw new Exception("BLKSZ EOF");
var nBlockSize = BitConverter.ToInt32(buffer, 0);
- nOffset = readerForBlocks.Position;
+ nOffset = fStream2.Position;
- nBytesRead = readerForBlocks.Read(buffer, 0, nBlockSize);
+ nBytesRead = fStream2.Read(buffer, 0, nBlockSize);
if (nBytesRead == 0 || nBytesRead != nBlockSize)
{
}*/
}
- dbConn.Commit();
-
return true;
}
git://git.novaco.in / NovacoinLibrary.git / blobdiff