/// <summary>
/// Connects this input to the relevant output of the referenced transaction if it's in the given map.
/// Connecting means updating the internal pointers and spent flags.
/// </summary>
/// <param name="transactions">Map of txhash->transaction.</param>
/// <param name="disconnect">Whether to abort if there's a pre-existing connection or not.</param>
/// <returns>True if connection took place, false if the referenced transaction was not in the list.</returns>
internal ConnectionResult Connect(IDictionary <Sha256Hash, Transaction> transactions, bool disconnect)
{
var h = new Sha256Hash(Outpoint.Hash);
Transaction tx;
if (!transactions.TryGetValue(h, out tx))
{
return(ConnectionResult.NoSuchTx);
}
var @out = tx.Outputs[Outpoint.Index];
if ([email protected])
{
if (disconnect)
{
@out.MarkAsUnspent();
}
else
{
return(ConnectionResult.AlreadySpent);
}
}
Outpoint.FromTx = tx;
@out.MarkAsSpent(this);
return(ConnectionResult.Success);
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
private void CreateNewStore(NetworkParameters @params, FileInfo file)
{
// Create a new block store if the file wasn't found or anything went wrong whilst reading.
_blockCache.Clear();
try
{
if (_channel != null)
{
_channel.Dispose();
_channel = null;
}
file.Delete();
_channel = file.Create(); // Create fresh.
_channel.Write(_fileFormatVersion);
}
catch (IOException e1)
{
// We could not load a block store nor could we create a new one!
throw new BlockStoreException(e1);
}
try
{
// Set up the genesis block. When we start out fresh, it is by definition the top of the chain.
var genesis = @params.GenesisBlock.CloneAsHeader();
var storedGenesis = new StoredBlock(genesis, genesis.GetWork(), 0);
_chainHead = new Sha256Hash(storedGenesis.Header.Hash);
_channel.Write(_chainHead.Hash);
Put(storedGenesis);
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
/// <exception cref="System.IO.IOException" />
/// <exception cref="BitCoinSharp.BlockStoreException" />
private void Load(FileInfo file)
{
_log.InfoFormat("Reading block store from {0}", file);
if (_channel != null)
{
_channel.Dispose();
}
_channel = file.OpenRead();
// Read a version byte.
var version = _channel.Read();
if (version == -1)
{
// No such file or the file was empty.
throw new FileNotFoundException(file.Name + " does not exist or is empty");
}
if (version != _fileFormatVersion)
{
throw new BlockStoreException("Bad version number: " + version);
}
// Chain head pointer is the first thing in the file.
var chainHeadHash = new byte[32];
_channel.Read(chainHeadHash);
_chainHead = new Sha256Hash(chainHeadHash);
_log.InfoFormat("Read chain head from disk: {0}", _chainHead);
_channel.Position = _channel.Length - Record.Size;
}
/// <exception cref="ProtocolException"/>
protected override void Parse()
{
_version = ReadUint32();
_prevBlockHash = ReadHash();
_merkleRoot = ReadHash();
_time = ReadUint32();
_difficultyTarget = ReadUint32();
_nonce = ReadUint32();
_hash = new Sha256Hash(Utils.ReverseBytes(Utils.DoubleDigest(Bytes, 0, Cursor)));
if (Cursor == Bytes.Length)
{
// This message is just a header, it has no transactions.
return;
}
var numTransactions = (int)ReadVarInt();
Transactions = new List <Transaction>(numTransactions);
for (var i = 0; i < numTransactions; i++)
{
var tx = new Transaction(Params, Bytes, Cursor);
Transactions.Add(tx);
Cursor += tx.MessageSize;
}
}
/// <exception cref="BitCoinSharp.ProtocolException" />
protected override void Parse()
{
_version = ReadUint32();
// First come the inputs.
var numInputs = ReadVarInt();
_inputs = new List <TransactionInput>((int)numInputs);
for (var i = 0UL; i < numInputs; i++)
{
var input = new TransactionInput(Params, this, Bytes, Cursor);
_inputs.Add(input);
Cursor += input.MessageSize;
}
// Now the outputs
var numOutputs = ReadVarInt();
_outputs = new List <TransactionOutput>((int)numOutputs);
for (var i = 0UL; i < numOutputs; i++)
{
var output = new TransactionOutput(Params, this, Bytes, Cursor);
_outputs.Add(output);
Cursor += output.MessageSize;
}
_lockTime = ReadUint32();
// Store a hash, it may come in useful later (want to avoid re-serialization costs).
_hash = new Sha256Hash(Utils.ReverseBytes(Utils.DoubleDigest(Bytes, Offset, Cursor - Offset)));
}
/// <summary>
/// Special case constructor, used for the genesis node, cloneAsHeader and unit tests.
/// </summary>
internal Block(NetworkParameters @params)
: base(@params)
{
// Set up a few basic things. We are not complete after this though.
_version = 1;
_difficultyTarget = 0x1d07fff8;
_time = (uint)UnixTime.ToUnixTime(DateTime.UtcNow);
_prevBlockHash = Sha256Hash.ZeroHash;
}
/// <summary>
/// Adds a transaction to this block.
/// </summary>
internal void AddTransaction(Transaction t)
{
if (Transactions == null)
{
Transactions = new List <Transaction>();
}
Transactions.Add(t);
// Force a recalculation next time the values are needed.
_merkleRoot = null;
_hash = null;
}
// TODO: Clean all this up once TransactionOutPoint disappears.
/// <summary>
/// Locates the referenced output from the given pool of transactions.
/// </summary>
/// <returns>The TransactionOutput or null if the transactions map doesn't contain the referenced tx.</returns>
internal TransactionOutput GetConnectedOutput(IDictionary <Sha256Hash, Transaction> transactions)
{
var h = new Sha256Hash(Outpoint.Hash);
Transaction tx;
if (!transactions.TryGetValue(h, out tx))
{
return(null);
}
var @out = tx.Outputs[Outpoint.Index];
return(@out);
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public StoredBlock Get(byte[] hashBytes)
{
lock (this)
{
// Check the memory cache first.
var hash = new Sha256Hash(hashBytes);
StoredBlock fromMem;
if (_blockCache.TryGetValue(hash, out fromMem))
{
return(fromMem);
}
if (_notFoundCache.TryGetValue(hash, out fromMem) && fromMem == _notFoundMarker)
{
return(null);
}
try
{
var fromDisk = GetRecord(hash);
StoredBlock block = null;
if (fromDisk == null)
{
_notFoundCache[hash] = _notFoundMarker;
while (_notFoundCache.Count > 100)
{
_notFoundCache.RemoveAt(0);
}
}
else
{
block = fromDisk.ToStoredBlock(_params);
_blockCache[hash] = block;
while (_blockCache.Count > 100)
{
_blockCache.RemoveAt(0);
}
}
return(block);
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
catch (ProtocolException e)
{
throw new BlockStoreException(e);
}
}
}
/// <exception cref="IOException"/>
private void BlockChainDownload(Sha256Hash toHash)
{
// This may run in ANY thread.
// The block chain download process is a bit complicated. Basically, we start with zero or more blocks in a
// chain that we have from a previous session. We want to catch up to the head of the chain BUT we don't know
// where that chain is up to or even if the top block we have is even still in the chain - we
// might have got ourselves onto a fork that was later resolved by the network.
//
// To solve this, we send the peer a block locator which is just a list of block hashes. It contains the
// blocks we know about, but not all of them, just enough of them so the peer can figure out if we did end up
// on a fork and if so, what the earliest still valid block we know about is likely to be.
//
// Once it has decided which blocks we need, it will send us an inv with up to 500 block messages. We may
// have some of them already if we already have a block chain and just need to catch up. Once we request the
// last block, if there are still more to come it sends us an "inv" containing only the hash of the head
// block.
//
// That causes us to download the head block but then we find (in processBlock) that we can't connect
// it to the chain yet because we don't have the intermediate blocks. So we rerun this function building a
// new block locator describing where we're up to.
//
// The getblocks with the new locator gets us another inv with another bunch of blocks. We download them once
// again. This time when the peer sends us an inv with the head block, we already have it so we won't download
// it again - but we recognize this case as special and call back into blockChainDownload to continue the
// process.
//
// So this is a complicated process but it has the advantage that we can download a chain of enormous length
// in a relatively stateless manner and with constant/bounded memory usage.
_log.InfoFormat("blockChainDownload({0})", toHash);
// TODO: Block locators should be abstracted out rather than special cased here.
var blockLocator = new LinkedList <Sha256Hash>();
// We don't do the exponential thinning here, so if we get onto a fork of the chain we will end up
// re-downloading the whole thing again.
blockLocator.AddLast(_params.GenesisBlock.Hash);
var topBlock = _blockChain.ChainHead.Header;
if (!topBlock.Equals(_params.GenesisBlock))
{
blockLocator.AddFirst(topBlock.Hash);
}
var message = new GetBlocksMessage(_params, blockLocator.ToList(), toHash);
_conn.WriteMessage(message);
}
/// <summary>
/// Asks the connected peer for the block of the given hash, and returns a Future representing the answer.
/// If you want the block right away and don't mind waiting for it, just call .get() on the result. Your thread
/// will block until the peer answers. You can also use the Future object to wait with a timeout, or just check
/// whether it's done later.
/// </summary>
/// <param name="blockHash">Hash of the block you were requesting.</param>
/// <exception cref="IOException"/>
public IAsyncResult BeginGetBlock(Sha256Hash blockHash, AsyncCallback callback, object state)
{
var getdata = new GetDataMessage(_params);
var inventoryItem = new InventoryItem(InventoryItem.ItemType.Block, blockHash);
getdata.AddItem(inventoryItem);
var future = new GetDataFuture <Block>(inventoryItem, callback, state);
// Add to the list of things we're waiting for. It's important this come before the network send to avoid
// race conditions.
lock (_pendingGetBlockFutures)
{
_pendingGetBlockFutures.Add(future);
}
_conn.WriteMessage(getdata);
return(future);
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public void SetChainHead(StoredBlock chainHead)
{
lock (this)
{
try
{
var hash = chainHead.Header.Hash;
_chainHead = new Sha256Hash(hash);
// Write out new hash to the first 32 bytes of the file past one (first byte is version number).
_stream.Seek(1, SeekOrigin.Begin);
_stream.Write(hash, 0, hash.Length);
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public void SetChainHead(StoredBlock chainHead)
{
lock (this)
{
try
{
var hash = chainHead.Header.Hash;
_chainHead = new Sha256Hash(hash);
// Write out new hash to the first 32 bytes of the file past one (first byte is version number).
var originalPos = _channel.Position;
_channel.Position = 1;
_channel.Write(hash, 0, hash.Length);
_channel.Position = originalPos;
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public void Put(StoredBlock block)
{
lock (this)
{
try
{
var hash = new Sha256Hash(block.Header.Hash);
Debug.Assert(!_blockMap.ContainsKey(hash), "Attempt to insert duplicate");
// Append to the end of the file. The other fields in StoredBlock will be recalculated when it's reloaded.
var bytes = block.Header.BitcoinSerialize();
_stream.Write(bytes);
_stream.Flush();
_blockMap[hash] = block;
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public void Put(StoredBlock block)
{
lock (this)
{
try
{
var hash = new Sha256Hash(block.Header.Hash);
// Append to the end of the file.
_dummyRecord.Write(_channel, block);
_blockCache[hash] = block;
while (_blockCache.Count > 100)
{
_blockCache.RemoveAt(0);
}
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
/// <exception cref="System.IO.IOException" />
/// <exception cref="BitCoinSharp.ProtocolException" />
private Record GetRecord(Sha256Hash hash)
{
var startPos = _channel.Position;
// Use our own file pointer within the tight loop as updating channel positions is really expensive.
var pos = startPos;
var record = new Record();
do
{
if (!record.Read(_channel, pos, _buf))
{
throw new IOException("Failed to read buffer");
}
if (record.GetHeader(_params).Hash.SequenceEqual(hash.Hash))
{
// Found it. Update file position for next time.
_channel.Position = pos;
return(record);
}
// Did not find it.
if (pos == 1 + 32)
{
// At the start so wrap around to the end.
pos = _channel.Length - Record.Size;
}
else
{
// Move backwards.
pos = pos - Record.Size;
Debug.Assert(pos >= 1 + 32, pos.ToString());
}
} while (pos != startPos);
// Was never stored.
_channel.Position = pos;
return(null);
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public void Put(StoredBlock block)
{
lock (this)
{
try
{
var hash = new Sha256Hash(block.Header.Hash);
// Append to the end of the file.
_dummyRecord.Write(_channel, block);
_blockCache[hash] = block;
while (_blockCache.Count > 100)
{
_blockCache.RemoveAt(0);
}
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
}
/// <exception cref="ProtocolException"/>
protected override void Parse()
{
_version = ReadUint32();
_prevBlockHash = ReadHash();
_merkleRoot = ReadHash();
_time = ReadUint32();
_difficultyTarget = ReadUint32();
_nonce = ReadUint32();
_hash = new Sha256Hash(Utils.ReverseBytes(Utils.DoubleDigest(Bytes, 0, Cursor)));
if (Cursor == Bytes.Length)
{
// This message is just a header, it has no transactions.
return;
}
var numTransactions = (int) ReadVarInt();
Transactions = new List<Transaction>(numTransactions);
for (var i = 0; i < numTransactions; i++)
{
var tx = new Transaction(Params, Bytes, Cursor);
Transactions.Add(tx);
Cursor += tx.MessageSize;
}
}
/// <exception cref="System.IO.IOException" />
/// <exception cref="BitCoinSharp.BlockStoreException" />
private void Load(FileInfo file)
{
_log.InfoFormat("Reading block store from {0}", file);
using (var input = file.OpenRead())
{
// Read a version byte.
var version = input.Read();
if (version == -1)
{
// No such file or the file was empty.
throw new FileNotFoundException(file.Name + " does not exist or is empty");
}
if (version != 1)
{
throw new BlockStoreException("Bad version number: " + version);
}
// Chain head pointer is the first thing in the file.
var chainHeadHash = new byte[32];
input.Read(chainHeadHash);
_chainHead = new Sha256Hash(chainHeadHash);
_log.InfoFormat("Read chain head from disk: {0}", _chainHead);
var now = Environment.TickCount;
// Rest of file is raw block headers.
var headerBytes = new byte[Block.HeaderSize];
try
{
while (true)
{
// Read a block from disk.
if (input.Read(headerBytes) < 80)
{
// End of file.
break;
}
// Parse it.
var b = new Block(_params, headerBytes);
// Look up the previous block it connects to.
var prev = Get(b.PrevBlockHash);
StoredBlock s;
if (prev == null)
{
// First block in the stored chain has to be treated specially.
if (b.Equals(_params.GenesisBlock))
{
s = new StoredBlock(_params.GenesisBlock.CloneAsHeader(), _params.GenesisBlock.GetWork(), 0);
}
else
{
throw new BlockStoreException("Could not connect " + Utils.BytesToHexString(b.Hash) + " to "
+ Utils.BytesToHexString(b.PrevBlockHash));
}
}
else
{
// Don't try to verify the genesis block to avoid upsetting the unit tests.
b.Verify();
// Calculate its height and total chain work.
s = prev.Build(b);
}
// Save in memory.
_blockMap[new Sha256Hash(b.Hash)] = s;
}
}
catch (ProtocolException e)
{
// Corrupted file.
throw new BlockStoreException(e);
}
catch (VerificationException e)
{
// Should not be able to happen unless the file contains bad blocks.
throw new BlockStoreException(e);
}
var elapsed = Environment.TickCount - now;
_log.InfoFormat("Block chain read complete in {0}ms", elapsed);
}
}
public GetBlocksMessage(NetworkParameters @params, IList<Sha256Hash> locator, Sha256Hash stopHash)
: base(@params)
{
_locator = locator;
_stopHash = stopHash;
}
public IList<Sha256Hash> Locator
{
get { return _locator; }
}
public Sha256Hash StopHash
/// <exception cref="BitCoinSharp.BlockStoreException" />
/// <exception cref="System.IO.IOException" />
/// <exception cref="BitCoinSharp.ProtocolException" />
private Record GetRecord(Sha256Hash hash)
{
var startPos = _channel.Position;
// Use our own file pointer within the tight loop as updating channel positions is really expensive.
var pos = startPos;
var record = new Record();
do
{
if (!record.Read(_channel, pos, _buf))
throw new IOException("Failed to read buffer");
if (record.GetHeader(_params).Hash.SequenceEqual(hash.Hash))
{
// Found it. Update file position for next time.
_channel.Position = pos;
return record;
}
// Did not find it.
if (pos == 1 + 32)
{
// At the start so wrap around to the end.
pos = _channel.Length - Record.Size;
}
else
{
// Move backwards.
pos = pos - Record.Size;
Debug.Assert(pos >= 1 + 32, pos.ToString());
}
} while (pos != startPos);
// Was never stored.
_channel.Position = pos;
return null;
}
/// <exception cref="System.IO.IOException" />
/// <exception cref="BitCoinSharp.BlockStoreException" />
private void Load(FileInfo file)
{
_log.InfoFormat("Reading block store from {0}", file);
if (_channel != null)
{
_channel.Dispose();
}
_channel = file.OpenRead();
// Read a version byte.
var version = _channel.Read();
if (version == -1)
{
// No such file or the file was empty.
throw new FileNotFoundException(file.Name + " does not exist or is empty");
}
if (version != _fileFormatVersion)
{
throw new BlockStoreException("Bad version number: " + version);
}
// Chain head pointer is the first thing in the file.
var chainHeadHash = new byte[32];
_channel.Read(chainHeadHash);
_chainHead = new Sha256Hash(chainHeadHash);
_log.InfoFormat("Read chain head from disk: {0}", _chainHead);
_channel.Position = _channel.Length - Record.Size;
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public void SetChainHead(StoredBlock chainHead)
{
lock (this)
{
try
{
var hash = chainHead.Header.Hash;
_chainHead = new Sha256Hash(hash);
// Write out new hash to the first 32 bytes of the file past one (first byte is version number).
_stream.Seek(1, SeekOrigin.Begin);
_stream.Write(hash, 0, hash.Length);
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
}
/// <summary>
/// Adds a transaction to this block.
/// </summary>
internal void AddTransaction(Transaction t)
{
if (Transactions == null)
{
Transactions = new List<Transaction>();
}
Transactions.Add(t);
// Force a recalculation next time the values are needed.
_merkleRoot = null;
_hash = null;
}
/// <summary>
/// Special case constructor, used for the genesis node, cloneAsHeader and unit tests.
/// </summary>
internal Block(NetworkParameters @params)
: base(@params)
{
// Set up a few basic things. We are not complete after this though.
_version = 1;
_difficultyTarget = 0x1d07fff8;
_time = (uint) UnixTime.ToUnixTime(DateTime.UtcNow);
_prevBlockHash = Sha256Hash.ZeroHash;
}
/// <exception cref="System.IO.IOException" />
/// <exception cref="BitCoinSharp.BlockStoreException" />
private void Load(FileInfo file)
{
_log.InfoFormat("Reading block store from {0}", file);
using (var input = file.OpenRead())
{
// Read a version byte.
var version = input.Read();
if (version == -1)
{
// No such file or the file was empty.
throw new FileNotFoundException(file.Name + " does not exist or is empty");
}
if (version != 1)
{
throw new BlockStoreException("Bad version number: " + version);
}
// Chain head pointer is the first thing in the file.
var chainHeadHash = new byte[32];
input.Read(chainHeadHash);
_chainHead = new Sha256Hash(chainHeadHash);
_log.InfoFormat("Read chain head from disk: {0}", _chainHead);
var now = Environment.TickCount;
// Rest of file is raw block headers.
var headerBytes = new byte[Block.HeaderSize];
try
{
while (true)
{
// Read a block from disk.
if (input.Read(headerBytes) < 80)
{
// End of file.
break;
}
// Parse it.
var b = new Block(_params, headerBytes);
// Look up the previous block it connects to.
var prev = Get(b.PrevBlockHash);
StoredBlock s;
if (prev == null)
{
// First block in the stored chain has to be treated specially.
if (b.Equals(_params.GenesisBlock))
{
s = new StoredBlock(_params.GenesisBlock.CloneAsHeader(), _params.GenesisBlock.GetWork(), 0);
}
else
{
throw new BlockStoreException("Could not connect " + Utils.BytesToHexString(b.Hash) + " to "
+ Utils.BytesToHexString(b.PrevBlockHash));
}
}
else
{
// Don't try to verify the genesis block to avoid upsetting the unit tests.
b.Verify();
// Calculate its height and total chain work.
s = prev.Build(b);
}
// Save in memory.
_blockMap[new Sha256Hash(b.Hash)] = s;
}
}
catch (ProtocolException e)
{
// Corrupted file.
throw new BlockStoreException(e);
}
catch (VerificationException e)
{
// Should not be able to happen unless the file contains bad blocks.
throw new BlockStoreException(e);
}
var elapsed = Environment.TickCount - now;
_log.InfoFormat("Block chain read complete in {0}ms", elapsed);
}
}
/// <summary>
/// Connects this input to the relevant output of the referenced transaction if it's in the given map.
/// Connecting means updating the internal pointers and spent flags.
/// </summary>
/// <param name="transactions">Map of txhash->transaction.</param>
/// <param name="disconnect">Whether to abort if there's a pre-existing connection or not.</param>
/// <returns>True if connection took place, false if the referenced transaction was not in the list.</returns>
internal ConnectionResult Connect(IDictionary<Sha256Hash, Transaction> transactions, bool disconnect)
{
var h = new Sha256Hash(Outpoint.Hash);
Transaction tx;
if (!transactions.TryGetValue(h, out tx))
return ConnectionResult.NoSuchTx;
var @out = tx.Outputs[Outpoint.Index];
if ([email protected])
{
if (disconnect)
@out.MarkAsUnspent();
else
return ConnectionResult.AlreadySpent;
}
Outpoint.FromTx = tx;
@out.MarkAsSpent(this);
return ConnectionResult.Success;
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public void SetChainHead(StoredBlock chainHead)
{
lock (this)
{
try
{
var hash = chainHead.Header.Hash;
_chainHead = new Sha256Hash(hash);
// Write out new hash to the first 32 bytes of the file past one (first byte is version number).
var originalPos = _channel.Position;
_channel.Position = 1;
_channel.Write(hash, 0, hash.Length);
_channel.Position = originalPos;
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
private void CreateNewStore(NetworkParameters @params, FileInfo file)
{
// Create a new block store if the file wasn't found or anything went wrong whilst reading.
_blockCache.Clear();
try
{
if (_channel != null)
{
_channel.Dispose();
_channel = null;
}
file.Delete();
_channel = file.Create(); // Create fresh.
_channel.Write(_fileFormatVersion);
}
catch (IOException e1)
{
// We could not load a block store nor could we create a new one!
throw new BlockStoreException(e1);
}
try
{
// Set up the genesis block. When we start out fresh, it is by definition the top of the chain.
var genesis = @params.GenesisBlock.CloneAsHeader();
var storedGenesis = new StoredBlock(genesis, genesis.GetWork(), 0);
_chainHead = new Sha256Hash(storedGenesis.Header.Hash);
_channel.Write(_chainHead.Hash);
Put(storedGenesis);
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
/// <exception cref="BitCoinSharp.ProtocolException" />
protected override void Parse()
{
_version = ReadUint32();
// First come the inputs.
var numInputs = ReadVarInt();
_inputs = new List<TransactionInput>((int) numInputs);
for (var i = 0UL; i < numInputs; i++)
{
var input = new TransactionInput(Params, this, Bytes, Cursor);
_inputs.Add(input);
Cursor += input.MessageSize;
}
// Now the outputs
var numOutputs = ReadVarInt();
_outputs = new List<TransactionOutput>((int) numOutputs);
for (var i = 0UL; i < numOutputs; i++)
{
var output = new TransactionOutput(Params, this, Bytes, Cursor);
_outputs.Add(output);
Cursor += output.MessageSize;
}
_lockTime = ReadUint32();
// Store a hash, it may come in useful later (want to avoid re-serialization costs).
_hash = new Sha256Hash(Utils.ReverseBytes(Utils.DoubleDigest(Bytes, Offset, Cursor - Offset)));
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public void Put(StoredBlock block)
{
lock (this)
{
try
{
var hash = new Sha256Hash(block.Header.Hash);
Debug.Assert(!_blockMap.ContainsKey(hash), "Attempt to insert duplicate");
// Append to the end of the file. The other fields in StoredBlock will be recalculated when it's reloaded.
var bytes = block.Header.BitcoinSerialize();
_stream.Write(bytes);
_stream.Flush();
_blockMap[hash] = block;
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
}
}
// TODO: Clean all this up once TransactionOutPoint disappears.
/// <summary>
/// Locates the referenced output from the given pool of transactions.
/// </summary>
/// <returns>The TransactionOutput or null if the transactions map doesn't contain the referenced tx.</returns>
internal TransactionOutput GetConnectedOutput(IDictionary<Sha256Hash, Transaction> transactions)
{
var h = new Sha256Hash(Outpoint.Hash);
Transaction tx;
if (!transactions.TryGetValue(h, out tx))
return null;
var @out = tx.Outputs[Outpoint.Index];
return @out;
}
/// <exception cref="BitCoinSharp.BlockStoreException" />
public StoredBlock Get(byte[] hashBytes)
{
lock (this)
{
// Check the memory cache first.
var hash = new Sha256Hash(hashBytes);
StoredBlock fromMem;
if (_blockCache.TryGetValue(hash, out fromMem))
{
return fromMem;
}
if (_notFoundCache.TryGetValue(hash, out fromMem) && fromMem == _notFoundMarker)
{
return null;
}
try
{
var fromDisk = GetRecord(hash);
StoredBlock block = null;
if (fromDisk == null)
{
_notFoundCache[hash] = _notFoundMarker;
while (_notFoundCache.Count > 100)
{
_notFoundCache.RemoveAt(0);
}
}
else
{
block = fromDisk.ToStoredBlock(_params);
_blockCache[hash] = block;
while (_blockCache.Count > 100)
{
_blockCache.RemoveAt(0);
}
}
return block;
}
catch (IOException e)
{
throw new BlockStoreException(e);
}
catch (ProtocolException e)
{
throw new BlockStoreException(e);
}
}
}
