/// Previous block cursor
/// </summary>
[Ignore]
- public CBlockStoreItem prev {
- get { return CBlockStore.Instance.GetCursor(prevHash); }
+ public CBlockStoreItem prev
+ {
+ get { return CBlockStore.Instance.GetMapCursor(prevHash); }
}
/// <summary>
return null;
}
- return CBlockStore.Instance.GetCursor(nextHash);
+ 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;
get { return Interop.AppendWithZeros(ChainTrust); }
set { ChainTrust = Interop.TrimArray(value); }
}
+
+ public long nMint { get; internal set; }
+ public long nMoneySupply { get; internal set; }
}
/// <summary>
public long nTxOffset
{
get { return (long) VarInt.DecodeVarInt(TxOffset); }
+ private set { TxOffset = VarInt.EncodeVarInt(value); }
}
/// <summary>
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;
+ }
}
}
/// <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
byte[] TransactionHash { get; set; }
}
- public bool FetchInputs(ref CTransaction tx, ref Dictionary<COutPoint, CTxOut> queued, ref Dictionary<COutPoint, CTxOut> inputs, bool IsBlock, out bool Invalid)
+ public bool FetchInputs(CTransaction tx, ref Dictionary<COutPoint, TxOutItem> queued, ref Dictionary<COutPoint, TxOutItem> inputs, bool IsBlock, out bool Invalid)
{
Invalid = false;
var inputsKey = new COutPoint(item.TransactionHash, item.nOut);
+ item.IsSpent = true;
+
// Add output data to dictionary
- inputs[inputsKey] = new CTxOut(item.nValue, item.scriptPubKey);
+ inputs.Add(inputsKey, (TxOutItem) item);
}
if (queryResults.Count < tx.vin.Length)
}
// Add output data to dictionary
- inputs[outPoint] = queued[outPoint];
+ inputs.Add(outPoint, queued[outPoint]);
- // And remove it from queued data
- queued.Remove(outPoint);
+ // Mark output as spent
+ queued[outPoint].IsSpent = true;
}
}
else
return false; // nOut is out of range
}
+
+ // TODO: return inputs from map
+ throw new NotImplementedException();
- inputs[outPoint] = txPrev.vout[outPoint.n];
}
return false;
{
uint256 hashBlock = cursor.Hash;
- if (genesisBlockCursor == null && hashBlock == NetUtils.nHashGenesisBlock)
+ if (genesisBlockCursor == null && hashBlock == NetInfo.nHashGenesisBlock)
{
genesisBlockCursor = cursor;
}
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);
}
/// <returns>Result of operation</returns>
public bool GetBlockByTransactionID(uint256 TxID, ref CBlock block, ref CTransaction tx, ref long nBlockPos, ref long nTxPos)
{
- 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<IBlockJoinMerkle>("select * from [BlockStorage] b left join [MerkleNodes] m on (b.[ItemID] = m.[nParentBlockID]) where m.[TransactionHash] = ?", (byte[])TxID);
if (queryResult.Count == 1)
{
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)
git://git.novaco.in / NovacoinLibrary.git / blobdiff