//public TXInput(
// byte[] tXIDOutput,
// int outputIndex)
//{
// TXIDOutput = tXIDOutput;
// PrimaryKeyTXIDOutput = BitConverter.ToInt32(tXIDOutput, 0);
// OutputIndex = outputIndex;
//}
public TXInput(byte[] buffer, ref int index)
{
TXIDOutput = new byte[HASH_BYTE_SIZE];
Array.Copy(
buffer,
index,
TXIDOutput,
0,
HASH_BYTE_SIZE);
TXIDOutputShort = BitConverter.ToInt32(
buffer,
index);
index += HASH_BYTE_SIZE;
OutputIndex = BitConverter.ToInt32(
buffer,
index);
index += 4;
LengthScript = VarInt.GetInt32(
buffer,
ref index);
StartIndexScript = index;
index += LengthScript;
index += 4; // sequence
}
List <TX> ParseTXs(
byte[] hashMerkleRoot)
{
List <TX> tXs = new List <TX>();
int tXCount = VarInt.GetInt32(
Buffer,
ref IndexBuffer);
if (tXCount == 0)
{
}
else if (tXCount == 1)
{
TX tX = ParseTX(isCoinbase: true);
tXs.Add(tX);
if (!tX.Hash.IsEqual(hashMerkleRoot))
{
throw new ProtocolException(
"Payload merkle root corrupted");
}
}
else
{
int tXsLengthMod2 = tXCount & 1;
var merkleList = new byte[tXCount + tXsLengthMod2][];
TX tX = ParseTX(true);
tXs.Add(tX);
merkleList[0] = tX.Hash;
for (int t = 1; t < tXCount; t += 1)
{
tX = ParseTX(false);
tXs.Add(tX);
merkleList[t] = tX.Hash;
}
if (tXsLengthMod2 != 0)
{
merkleList[tXCount] = merkleList[tXCount - 1];
}
if (!GetRoot(merkleList).IsEqual(hashMerkleRoot))
{
throw new ProtocolException(
"Payload hash unequal with merkle root.");
}
}
return(tXs);
}
public AddressMessage(byte[] messagePayload)
: base("addr", messagePayload)
{
int startIndex = 0;
int addressesCount = VarInt.GetInt32(
Payload,
ref startIndex);
for (int i = 0; i < addressesCount; i++)
{
NetworkAddresses.Add(
NetworkAddress.ParseAddress(
Payload, ref startIndex));
}
}
public GetDataMessage(NetworkMessage message)
: base("getdata", message.Payload)
{
int startIndex = 0;
int inventoryCount = VarInt.GetInt32(
Payload,
ref startIndex);
for (int i = 0; i < inventoryCount; i += 1)
{
Inventories.Add(
Inventory.Parse(
Payload,
ref startIndex));
}
}
public InvMessage(byte[] buffer)
: base(
"inv",
buffer)
{
int startIndex = 0;
int inventoryCount = VarInt.GetInt32(
Payload,
ref startIndex);
for (int i = 0; i < inventoryCount; i++)
{
Inventories.Add(
Inventory.Parse(
Payload,
ref startIndex));
}
}
public TXOutput(
byte[] buffer,
ref int index)
{
Value = BitConverter.ToUInt64(
buffer,
index);
index += 8;
Buffer = buffer;
LengthScript = VarInt.GetInt32(
Buffer,
ref index);
StartIndexScript = index;
index += LengthScript;
}
void LoadCollisionData(byte[] buffer)
{
int index = 0;
int uintLength;
uint[] value;
while (index < buffer.Length)
{
byte[] key = new byte[HASH_BYTE_SIZE];
Array.Copy(buffer, index, key, 0, HASH_BYTE_SIZE);
index += HASH_BYTE_SIZE;
int byteLength = VarInt.GetInt32(buffer, ref index);
uintLength = byteLength >> 2;
value = new uint[uintLength];
Buffer.BlockCopy(buffer, index, value, 0, byteLength);
index += byteLength;
CollisionTable.Add(key, value);
}
}
void LoadPrimaryData(byte[] buffer)
{
int index = 0;
int key;
int uintLength;
uint[] value;
while (index < buffer.Length)
{
key = BitConverter.ToInt32(buffer, index);
index += 4;
int byteLength = VarInt.GetInt32(buffer, ref index);
uintLength = byteLength >> 2;
value = new uint[uintLength];
Buffer.BlockCopy(buffer, index, value, 0, byteLength);
index += byteLength;
PrimaryTable.Add(key, value);
}
}
public GetHeadersMessage(NetworkMessage message)
: base("getheaders", message.Payload)
{
int startIndex = 0;
var protocolVersionRemote = BitConverter.ToUInt32(Payload, startIndex);
startIndex += 4;
int headersCount = VarInt.GetInt32(Payload, ref startIndex);
for (int i = 0; i < headersCount; i++)
{
byte[] hash = new byte[32];
Array.Copy(Payload, startIndex, hash, 0, 32);
((List <byte[]>)HeaderLocator).Add(hash);
startIndex += 32;
}
Array.Copy(Payload, startIndex, StopHash, 0, 32);
startIndex += 32;
}
public override bool TryParse()
{
StopwatchParse.Start();
try
{
BufferIndex = 0;
BufferStartIndexesBlocks.Add(BufferIndex);
HeaderHash =
SHA256.ComputeHash(
SHA256.ComputeHash(
Buffer,
BufferIndex,
COUNT_HEADER_BYTES));
BufferIndex += COUNT_HEADER_BYTES;
TXCount = VarInt.GetInt32(Buffer, ref BufferIndex);
if (Header == null)
{
if (!Headerchain.TryReadHeader(
HeaderHash,
SHA256,
out Header))
{
throw new ChainException(string.Format(
"Header hash {0} not in chain.",
HeaderHash.ToHexString()));
}
}
else
{
ValidateHeaderHash(
HeaderHash,
Header.HeaderHash);
}
Headers.Add(Header);
HeaderPrevious = Header.HeaderPrevious;
ParseBlock(OFFSET_INDEX_MERKLE_ROOT);
BlockCount += 1;
CountItems += TXCount;
while (BufferIndex < Buffer.Length)
{
BufferStartIndexesBlocks.Add(BufferIndex);
HeaderHash =
SHA256.ComputeHash(
SHA256.ComputeHash(
Buffer,
BufferIndex,
COUNT_HEADER_BYTES));
int merkleRootIndex = BufferIndex + OFFSET_INDEX_MERKLE_ROOT;
BufferIndex += COUNT_HEADER_BYTES;
TXCount = VarInt.GetInt32(Buffer, ref BufferIndex);
Header = Header.HeadersNext[0];
ValidateHeaderHash(
HeaderHash,
Header.HeaderHash);
Headers.Add(Header);
ParseBlock(merkleRootIndex);
BlockCount += 1;
CountItems += TXCount;
}
ConvertTablesToArrays();
}
catch (Exception ex)
{
IsValid = false;
Console.WriteLine(
"Exception {0} loading archive {1}: {2}",
ex.GetType().Name,
Index,
ex.Message);
return(false);
}
StopwatchParse.Stop();
return(true);
}
byte[] ParseTX(bool isCoinbase)
{
try
{
int tXStartIndex = BufferIndex;
BufferIndex += BYTE_LENGTH_VERSION;
bool isWitnessFlagPresent = Buffer[BufferIndex] == 0x00;
if (isWitnessFlagPresent)
{
throw new NotImplementedException("Parsing of segwit txs not implemented");
//BufferIndex += 2;
}
int countInputs = VarInt.GetInt32(Buffer, ref BufferIndex);
if (isCoinbase)
{
new TXInput(Buffer, ref BufferIndex);
}
else
{
for (int i = 0; i < countInputs; i += 1)
{
TXInput input = new TXInput(Buffer, ref BufferIndex);
AddInput(input);
}
}
int countTXOutputs = VarInt.GetInt32(Buffer, ref BufferIndex);
for (int i = 0; i < countTXOutputs; i += 1)
{
BufferIndex += BYTE_LENGTH_OUTPUT_VALUE;
int lengthLockingScript = VarInt.GetInt32(Buffer, ref BufferIndex);
BufferIndex += lengthLockingScript;
}
//if (isWitnessFlagPresent)
//{
//var witnesses = new TXWitness[countInputs];
//for (int i = 0; i < countInputs; i += 1)
//{
// witnesses[i] = TXWitness.Parse(Buffer, ref BufferIndex);
//}
//}
BufferIndex += BYTE_LENGTH_LOCK_TIME;
int tXLength = BufferIndex - tXStartIndex;
byte[] tXHash = SHA256.ComputeHash(
SHA256.ComputeHash(
Buffer,
tXStartIndex,
tXLength));
AddOutput(
tXHash,
countTXOutputs);
return(tXHash);
}
catch (ArgumentOutOfRangeException)
{
throw new ChainException();
}
}
public TX ParseTX(
bool isCoinbase,
byte[] buffer,
ref int indexBuffer)
{
TX tX = new TX();
try
{
int tXStartIndex = indexBuffer;
indexBuffer += 4; // BYTE_LENGTH_VERSION
bool isWitnessFlagPresent = buffer[indexBuffer] == 0x00;
if (isWitnessFlagPresent)
{
throw new NotImplementedException(
"Parsing of segwit txs not implemented");
//BufferIndex += 2;
}
int countInputs = VarInt.GetInt32(
buffer, ref indexBuffer);
if (isCoinbase)
{
new TXInput(buffer, ref indexBuffer);
}
else
{
for (int i = 0; i < countInputs; i += 1)
{
tX.TXInputs.Add(
new TXInput(
buffer,
ref indexBuffer));
}
}
int countTXOutputs = VarInt.GetInt32(
buffer,
ref indexBuffer);
for (int i = 0; i < countTXOutputs; i += 1)
{
tX.TXOutputs.Add(
new TXOutput(
buffer,
ref indexBuffer));
}
//if (isWitnessFlagPresent)
//{
//var witnesses = new TXWitness[countInputs];
//for (int i = 0; i < countInputs; i += 1)
//{
// witnesses[i] = TXWitness.Parse(Buffer, ref BufferIndex);
//}
//}
indexBuffer += 4; //BYTE_LENGTH_LOCK_TIME
tX.Hash = SHA256.ComputeHash(
SHA256.ComputeHash(
buffer,
tXStartIndex,
indexBuffer - tXStartIndex));
tX.TXIDShort = BitConverter.ToInt32(tX.Hash, 0);
int lengthUTXOBits =
COUNT_NON_OUTPUT_BITS + countTXOutputs;
return(tX);
}
catch (ArgumentOutOfRangeException)
{
throw new BitcoinException(
"ArgumentOutOfRangeException thrown in ParseTX.");
}
}
public async Task StartMessageListener()
{
try
{
while (true)
{
await ReadMessage(Cancellation.Token);
string.Format(
"{0} received message {1}",
GetID(),
Command)
.Log(LogFile);
switch (Command)
{
case "ping":
await SendMessage(new PongMessage(
BitConverter.ToUInt64(Payload, 0)));
break;
case "addr":
AddressMessage addressMessage =
new AddressMessage(Payload);
break;
case "sendheaders":
await SendMessage(new SendHeadersMessage());
break;
case "feefilter":
FeeFilterMessage feeFilterMessage =
new FeeFilterMessage(Payload);
FeeFilterValue = feeFilterMessage.FeeFilterValue;
break;
case "block":
byte[] blockBytes = Payload
.Take(PayloadLength)
.ToArray();
Block block = BlockParser.ParseBlock(blockBytes);
string.Format(
"{0}: Receives block {1}.",
GetID(),
block.Header.Hash.ToHexString())
.Log(LogFile);
if (IsStateIdle())
{
// Received unsolicited block
}
else if (IsStateAwaitingBlock())
{
BlockDownload.InsertBlock(block);
if (BlockDownload.IsDownloadCompleted)
{
SignalProtocolTaskCompleted.Post(true);
Cancellation = new CancellationTokenSource();
break;
}
Cancellation.CancelAfter(
TIMEOUT_BLOCKDOWNLOAD_MILLISECONDS);
}
break;
case "headers":
Header header = null;
int index = 0;
int countHeaders = VarInt.GetInt32(
Payload,
ref index);
string.Format(
"{0}: Receiving {1} headers.",
GetID(),
countHeaders)
.Log(LogFile);
if (IsStateIdle())
{
header = BlockParser.ParseHeader(
Payload,
ref index);
index += 1;
if (!Blockchain.TryLock())
{
break;
}
try
{
string.Format(
"Received unsolicited header {0}",
header.Hash.ToHexString())
.Log(LogFile);
if (Blockchain.ContainsHeader(header.Hash))
{
Header headerContained = Blockchain.HeaderTip;
var headerDuplicates = new List <byte[]>();
int depthDuplicateAcceptedMax = 3;
int depthDuplicate = 0;
while (depthDuplicate < depthDuplicateAcceptedMax)
{
if (headerContained.Hash.IsEqual(header.Hash))
{
if (headerDuplicates.Any(h => h.IsEqual(header.Hash)))
{
throw new ProtocolException(
string.Format(
"Received duplicate header {0} more than once.",
header.Hash.ToHexString()));
}
headerDuplicates.Add(header.Hash);
if (headerDuplicates.Count > depthDuplicateAcceptedMax)
{
headerDuplicates = headerDuplicates.Skip(1)
.ToList();
}
break;
}
if (headerContained.HeaderPrevious != null)
{
break;
}
headerContained = header.HeaderPrevious;
depthDuplicate += 1;
}
if (depthDuplicate == depthDuplicateAcceptedMax)
{
throw new ProtocolException(
string.Format(
"Received duplicate header {0} with depth greater than {1}.",
header.Hash.ToHexString(),
depthDuplicateAcceptedMax));
}
}
else
if (header.HashPrevious.IsEqual(
Blockchain.HeaderTip.Hash))
{
header.HeaderPrevious = Blockchain.HeaderTip;
Blockchain.ValidateHeaders(header);
await Blockchain.Network
.SynchronizeUTXO(header, this);
Blockchain.ReleaseLock();
break;
}
else
{
IsSynchronized = false;
}
}
catch (Exception ex)
{
Blockchain.ReleaseLock();
throw ex;
}
Blockchain.ReleaseLock();
}
else if (IsStateAwaitingHeader())
{
if (countHeaders > 0)
{
header = BlockParser.ParseHeader(
Payload,
ref index);
index += 1;
HeaderDownload.InsertHeader(header);
while (index < PayloadLength)
{
header = BlockParser.ParseHeader(
Payload,
ref index);
index += 1;
HeaderDownload.InsertHeader(header);
}
}
string.Format(
"{0}: Signal getheaders task complete.",
GetID())
.Log(LogFile);
SignalProtocolTaskCompleted.Post(true);
Cancellation = new CancellationTokenSource();
break;
}
break;
case "notfound":
Console.WriteLine(
"Command notfound not implemented yet.");
break;
case "inv":
var invMessage = new InvMessage(Payload);
if (invMessage.Inventories.First().IsTX())
{
throw new ProtocolException(
"Received TX inv message despite TX-disable signaled.");
}
break;
default:
// Send message unknown
break;
}
}
}
catch (Exception ex)
{
FlagDispose = true;
Cancellation.Cancel();
string.Format(
"Peer {0} experienced error " +
"in message listener: \n{1}",
GetID(),
"message: " + ex.Message +
"stack trace: " + ex.StackTrace)
.Log(LogFile);
}
}