public void ValidationTransactionScript(Chain newChain, BlockTx tx, TxInput txInput, int txInputIndex, PrevTxOutput prevTxOutput)
{
if (ValidationTransactionScriptAction == null)
coreRules.ValidationTransactionScript(newChain, tx, txInput, txInputIndex, prevTxOutput);
else
ValidationTransactionScriptAction(newChain, tx, txInput, txInputIndex, prevTxOutput);
}
public static Block Create(BlockHeader header, ImmutableArray <Transaction> transactions)
{
var blockTxes = ImmutableArray.CreateRange(transactions.Select((tx, txIndex) =>
(BlockTx)BlockTx.Create(txIndex, tx)));
return(new Block(header, blockTxes));
}
public static Block DecodeBlock(UInt256 blockHash, byte[] buffer, ref int offset)
{
var header = DecodeBlockHeader(blockHash, buffer, ref offset);
var blockTxesCount = buffer.ReadVarInt(ref offset).ToIntChecked();
var blockTxes = ImmutableArray.CreateBuilder<BlockTx>(blockTxesCount);
for (var i = 0; i < blockTxesCount; i++)
{
var encodedTx = DecodeEncodedTx(null, buffer, ref offset);
var blockTx = new BlockTx(i, encodedTx);
blockTxes.Add(blockTx);
}
return new Block(header, blockTxes.MoveToImmutable());
}
public static Block DecodeBlock(BinaryReader reader)
{
var header = DecodeBlockHeader(null, reader.ReadExactly(80));
var blockTxesCount = reader.ReadVarInt().ToIntChecked();
var blockTxes = ImmutableArray.CreateBuilder<BlockTx>(blockTxesCount);
for (var i = 0; i < blockTxesCount; i++)
{
var txBytes = ReadTransaction(reader);
var encodedTx = DecodeEncodedTx(null, txBytes);
var blockTx = new BlockTx(i, encodedTx);
blockTxes.Add(blockTx);
}
return new Block(header, blockTxes.MoveToImmutable());
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out BlockTx transaction)
{
ImmutableSortedDictionary<int, BlockTxNode> blockTxes;
BlockTxNode blockTxNode;
if (this.allBlockTxNodes.TryGetValue(blockHash, out blockTxes)
&& blockTxes.TryGetValue(txIndex, out blockTxNode)
&& !blockTxNode.Pruned)
{
transaction = blockTxNode.ToBlockTx();
return true;
}
else
{
transaction = null;
return false;
}
}
public void TestDoubleSpend()
{
// prepare block
var fakeHeaders = new FakeHeaders();
var chainedHeader0 = fakeHeaders.GenesisChained();
var chainedHeader1 = fakeHeaders.NextChained();
var chainedHeader2 = fakeHeaders.NextChained();
var chain = Chain.CreateForGenesisBlock(chainedHeader0).ToBuilder();
var emptyCoinbaseTx0 = new BlockTx(0, new Transaction(0, ImmutableArray.Create<TxInput>(), ImmutableArray.Create<TxOutput>(), 0));
var emptyCoinbaseTx1 = new BlockTx(0, new Transaction(1, ImmutableArray.Create<TxInput>(), ImmutableArray.Create<TxOutput>(), 0));
// initialize memory utxo builder storage
var memoryStorage = new MemoryStorageManager();
var memoryChainStateCursor = memoryStorage.OpenChainStateCursor().Item;
memoryChainStateCursor.BeginTransaction();
// initialize utxo builder
var utxoBuilder = new UtxoBuilder();
// prepare an unspent transaction
var txHash = new UInt256(100);
var unspentTx = new UnspentTx(txHash, chainedHeader1.Height, 0, 1, OutputState.Unspent);
// add the unspent transaction
memoryChainStateCursor.TryAddUnspentTx(unspentTx);
// create an input to spend the unspent transaction
var input = new TxInput(new TxOutputKey(txHash, txOutputIndex: 0), ImmutableArray.Create<byte>(), 0);
var tx = new BlockTx(1, new Transaction(0, ImmutableArray.Create(input), ImmutableArray.Create<TxOutput>(), 0));
// spend the input
chain.AddBlock(chainedHeader1);
utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx0, tx }.ToBufferBlock()).ToEnumerable().ToList();
// verify utxo storage
UnspentTx actualUnspentTx;
Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx));
Assert.IsTrue(actualUnspentTx.IsFullySpent);
// attempt to spend the input again, validation exception should be thrown
chain.AddBlock(chainedHeader2);
AssertMethods.AssertAggregateThrows<ValidationException>(() =>
utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx1, tx }.ToBufferBlock()).ToEnumerable().ToList());
}
public void TestUtxoLookAheadCoinbaseOnly()
{
var blockTxes = new BufferBlock<BlockTx>();
var deferredCursor = new Mock<IDeferredChainStateCursor>();
deferredCursor.Setup(x => x.CursorCount).Returns(4);
var lookAhead = UtxoLookAhead.LookAhead(blockTxes, deferredCursor.Object);
// post a coinbase transaction, the inputs should not be looked up
var blockTx = new BlockTx(0, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
blockTxes.Post(blockTx);
blockTxes.Complete();
// verify coinbase tx was forarded, with no inputs used from the chain state (no inputs were mocked)
var warmedTxes = lookAhead.ReceiveAllAsync().Result;
Assert.AreEqual(1, warmedTxes.Count);
Assert.AreEqual(warmedTxes[0].Transaction.Hash, blockTx.Transaction.Hash);
Assert.IsTrue(lookAhead.Completion.Wait(2000));
}
public bool TryAddBlockTransactions(UInt256 blockHash, IEnumerable<EncodedTx> blockTxes)
{
if (ContainsBlock(blockHash))
return false;
var writeBatch = new WriteBatch();
try
{
int txCount;
using (var snapshot = db.GetSnapshot())
{
var readOptions = new ReadOptions { Snapshot = snapshot };
var txIndex = 0;
foreach (var tx in blockTxes)
{
var key = DbEncoder.EncodeBlockHashTxIndex(blockHash, txIndex);
Slice existingValue;
if (db.TryGet(readOptions, key, out existingValue))
return false;
var blockTx = new BlockTx(txIndex, tx);
var value = DataEncoder.EncodeBlockTxNode(blockTx);
writeBatch.Put(key, value);
txIndex++;
}
txCount = txIndex;
}
return TryAddBlockInner(blockHash, txCount, writeBatch);
}
finally
{
writeBatch.Dispose();
}
}
public void TestUtxoLookAheadWarmupException()
{
var deferredCursor = new Mock<IDeferredChainStateCursor>();
deferredCursor.Setup(x => x.CursorCount).Returns(4);
var blockTxes = new BufferBlock<BlockTx>();
var lookAhead = UtxoLookAhead.LookAhead(blockTxes, deferredCursor.Object);
var blockTx0 = new BlockTx(0, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
var blockTx1 = new BlockTx(1, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
var expectedException = new InvalidOperationException();
deferredCursor.Setup(x => x.WarmUnspentTx(blockTx1.Transaction.Inputs[0].PreviousTxOutputKey.TxHash)).Throws(expectedException);
blockTxes.Post(blockTx0);
blockTxes.Post(blockTx1);
blockTxes.Complete();
Exception actualEx;
AssertMethods.AssertAggregateThrows<Exception>(() =>
lookAhead.Completion.Wait(2000), out actualEx);
Assert.AreSame(expectedException, actualEx);
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out BlockTx transaction)
{
using (var handle = this.cursorCache.TakeItem())
{
var cursor = handle.Item;
using (var jetTx = cursor.jetSession.BeginTransaction())
{
int blockIndex;
if (!TryGetBlockIndex(cursor, blockHash, out blockIndex))
{
transaction = null;
return false;
}
Api.JetSetCurrentIndex(cursor.jetSession, cursor.blocksTableId, "IX_BlockIndexTxIndex");
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, blockIndex, MakeKeyGrbit.NewKey);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, txIndex, MakeKeyGrbit.None);
if (Api.TrySeek(cursor.jetSession, cursor.blocksTableId, SeekGrbit.SeekEQ))
{
var blockTxHashColumn = new BytesColumnValue { Columnid = cursor.blockTxHashColumnId };
var blockTxBytesColumn = new BytesColumnValue { Columnid = cursor.blockTxBytesColumnId };
Api.RetrieveColumns(cursor.jetSession, cursor.blocksTableId, blockTxHashColumn, blockTxBytesColumn);
if (blockTxBytesColumn.Value != null)
{
var txHash = DbEncoder.DecodeUInt256(blockTxHashColumn.Value);
transaction = new BlockTx(txIndex, txHash, blockTxBytesColumn.Value.ToImmutableArray());
return true;
}
else
{
transaction = null;
return false;
}
}
else
{
transaction = null;
return false;
}
}
}
}
public bool TryAddBlockTransactions(UInt256 blockHash, IEnumerable<Transaction> blockTxes)
{
try
{
if (this.ContainsBlock(blockHash))
return false;
using (var txn = this.jetInstance.BeginTransaction())
{
var txIndex = 0;
foreach (var tx in blockTxes)
{
var blockTx = new BlockTx(txIndex, 0, tx.Hash, false, tx);
var key = DbEncoder.EncodeBlockHashTxIndex(blockHash, txIndex);
var value = DataEncoder.EncodeBlockTx(blockTx);
txn.Put(blocksTableId, key, value);
txIndex++;
}
// increase block count
txn.Put(globalsTableId, blockCountKey,
Bits.ToInt32(txn.Get(globalsTableId, blockCountKey)) + 1);
txn.Commit();
return true;
}
}
catch (Exception)
{
return false;
}
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out BlockTx transaction)
{
return GetStorage(blockHash).TryGetTransaction(blockHash, txIndex, out transaction);
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out BlockTx transaction)
{
return this.blockTxesStorage.Value.TryGetTransaction(blockHash, txIndex, out transaction);
}
public void TestUtxoLookAheadWithTransactions()
{
var deferredCursor = new Mock<IDeferredChainStateCursor>();
deferredCursor.Setup(x => x.CursorCount).Returns(4);
var blockTxes = new BufferBlock<BlockTx>();
var lookAhead = UtxoLookAhead.LookAhead(blockTxes, deferredCursor.Object);
var blockTx0 = new BlockTx(0, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
var blockTx1 = new BlockTx(1, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
var blockTx2 = new BlockTx(2, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
blockTxes.Post(blockTx0);
blockTxes.Post(blockTx1);
blockTxes.Post(blockTx2);
blockTxes.Complete();
// verify each transaction was forwarded
var expectedBlockTxes = new[] { blockTx0, blockTx1, blockTx2 };
var warmedTxes = lookAhead.ReceiveAllAsync().Result;
Assert.AreEqual(3, warmedTxes.Count);
CollectionAssert.AreEqual(expectedBlockTxes.Select(x => x.Transaction.Hash).ToList(), warmedTxes.Select(x => x.Transaction.Hash).ToList());
// verify each non-coinbase input transaction was warmed up
var expectedLookups = expectedBlockTxes.Skip(1).SelectMany(x => x.Transaction.Inputs.Select(input => input.PreviousTxOutputKey.TxHash));
foreach (var txHash in expectedLookups)
deferredCursor.Verify(x => x.WarmUnspentTx(txHash));
Assert.IsTrue(lookAhead.Completion.Wait(2000));
}
public void WriteNode(MerkleTreeNode node)
{
if (!node.Pruned)
throw new ArgumentException();
var kvPair = cursor.GetCurrent().Value;
UInt256 recordBlockHash; int txIndex;
DbEncoder.DecodeBlockHashTxIndex(kvPair.Key, out recordBlockHash, out txIndex);
if (this.blockHash != recordBlockHash)
throw new InvalidOperationException();
if (node.Index != txIndex)
throw new InvalidOperationException();
var key = DbEncoder.EncodeBlockHashTxIndex(blockHash, node.Index);
var blockTx = new BlockTx(node.Index, node.Depth, node.Hash, node.Pruned, null);
cursor.Put(key, DataEncoder.EncodeBlockTx(blockTx), CursorPutOptions.Current);
}
public void TestSimpleSpend()
{
// prepare block
var fakeHeaders = new FakeHeaders();
var chainedHeader0 = fakeHeaders.GenesisChained();
var chainedHeader1 = fakeHeaders.NextChained();
var chainedHeader2 = fakeHeaders.NextChained();
var chainedHeader3 = fakeHeaders.NextChained();
var chain = Chain.CreateForGenesisBlock(chainedHeader0).ToBuilder();
var emptyCoinbaseTx0 = new BlockTx(0, new Transaction(0, ImmutableArray.Create<TxInput>(), ImmutableArray.Create<TxOutput>(), 0));
var emptyCoinbaseTx1 = new BlockTx(1, new Transaction(1, ImmutableArray.Create<TxInput>(), ImmutableArray.Create<TxOutput>(), 0));
var emptyCoinbaseTx2 = new BlockTx(2, new Transaction(2, ImmutableArray.Create<TxInput>(), ImmutableArray.Create<TxOutput>(), 0));
// initialize memory utxo builder storage
var memoryStorage = new MemoryStorageManager();
var memoryChainStateCursor = memoryStorage.OpenChainStateCursor().Item;
memoryChainStateCursor.BeginTransaction();
// initialize utxo builder
var utxoBuilder = new UtxoBuilder();
// prepare an unspent transaction
var txHash = new UInt256(100);
var unspentTx = new UnspentTx(txHash, chainedHeader1.Height, 0, 3, OutputState.Unspent);
// prepare unspent output
var unspentTransactions = ImmutableDictionary.Create<UInt256, UnspentTx>().Add(txHash, unspentTx);
// add the unspent transaction
memoryChainStateCursor.TryAddUnspentTx(unspentTx);
// create an input to spend the unspent transaction's first output
var input0 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 0), ImmutableArray.Create<byte>(), 0);
var tx0 = new BlockTx(1, new Transaction(0, ImmutableArray.Create(input0), ImmutableArray.Create<TxOutput>(), 0));
// spend the input
chain.AddBlock(chainedHeader1);
utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx0, tx0 }.ToBufferBlock()).ToEnumerable().ToList();
// verify utxo storage
UnspentTx actualUnspentTx;
Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx));
Assert.IsTrue(actualUnspentTx.OutputStates.Length == 3);
Assert.IsTrue(actualUnspentTx.OutputStates[0] == OutputState.Spent);
Assert.IsTrue(actualUnspentTx.OutputStates[1] == OutputState.Unspent);
Assert.IsTrue(actualUnspentTx.OutputStates[2] == OutputState.Unspent);
// create an input to spend the unspent transaction's second output
var input1 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 1), ImmutableArray.Create<byte>(), 0);
var tx1 = new BlockTx(1, new Transaction(0, ImmutableArray.Create(input1), ImmutableArray.Create<TxOutput>(), 0));
// spend the input
chain.AddBlock(chainedHeader2);
utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx1, tx1 }.ToBufferBlock()).ToEnumerable().ToList();
// verify utxo storage
Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx));
Assert.IsTrue(actualUnspentTx.OutputStates.Length == 3);
Assert.IsTrue(actualUnspentTx.OutputStates[0] == OutputState.Spent);
Assert.IsTrue(actualUnspentTx.OutputStates[1] == OutputState.Spent);
Assert.IsTrue(actualUnspentTx.OutputStates[2] == OutputState.Unspent);
// create an input to spend the unspent transaction's third output
var input2 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 2), ImmutableArray.Create<byte>(), 0);
var tx2 = new BlockTx(2, new Transaction(0, ImmutableArray.Create(input2), ImmutableArray.Create<TxOutput>(), 0));
// spend the input
chain.AddBlock(chainedHeader3);
utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx2, tx2 }.ToBufferBlock()).ToEnumerable().ToList();
// verify utxo storage
Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx));
Assert.IsTrue(actualUnspentTx.IsFullySpent);
}
private IEnumerator<BlockTx> ReadBlockTransactions(UInt256 blockHash)
{
using (var handle = this.cursorCache.TakeItem())
{
var cursor = handle.Item;
using (var jetTx = cursor.jetSession.BeginTransaction())
{
int blockIndex;
if (!TryGetBlockIndex(cursor, blockHash, out blockIndex))
throw new MissingDataException(blockHash);
Api.JetSetCurrentIndex(cursor.jetSession, cursor.blocksTableId, "IX_BlockIndexTxIndex");
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, blockIndex, MakeKeyGrbit.NewKey);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, 0, MakeKeyGrbit.None);
if (!Api.TrySeek(cursor.jetSession, cursor.blocksTableId, SeekGrbit.SeekGE))
throw new MissingDataException(blockHash);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, blockIndex, MakeKeyGrbit.NewKey);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, int.MaxValue, MakeKeyGrbit.None);
if (!Api.TrySetIndexRange(cursor.jetSession, cursor.blocksTableId, SetIndexRangeGrbit.RangeUpperLimit))
throw new MissingDataException(blockHash);
do
{
var txIndexColumn = new Int32ColumnValue { Columnid = cursor.txIndexColumnId };
var blockDepthColumn = new Int32ColumnValue { Columnid = cursor.blockDepthColumnId };
var blockTxHashColumn = new BytesColumnValue { Columnid = cursor.blockTxHashColumnId };
var blockTxBytesColumn = new BytesColumnValue { Columnid = cursor.blockTxBytesColumnId };
Api.RetrieveColumns(cursor.jetSession, cursor.blocksTableId, txIndexColumn, blockDepthColumn, blockTxHashColumn, blockTxBytesColumn);
var txIndex = txIndexColumn.Value.Value;
var depth = blockDepthColumn.Value.Value;
var txHash = DbEncoder.DecodeUInt256(blockTxHashColumn.Value);
var txBytes = blockTxBytesColumn.Value;
// determine if transaction is pruned by its depth
var pruned = depth >= 0;
depth = Math.Max(0, depth);
var tx = !pruned ? DataEncoder.DecodeTransaction(txBytes, txHash) : null;
var blockTx = new BlockTx(txIndex, depth, txHash, pruned, tx);
yield return blockTx;
}
while (Api.TryMoveNext(cursor.jetSession, cursor.blocksTableId));
}
}
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out BlockTx transaction)
{
Slice value;
if (db.TryGet(new ReadOptions(), DbEncoder.EncodeBlockHashTxIndex(blockHash, txIndex), out value))
{
var blockTxNode = DataDecoder.DecodeBlockTxNode(value.ToArray());
if (!blockTxNode.Pruned)
{
transaction = blockTxNode.ToBlockTx();
return true;
}
else
{
transaction = default(BlockTx);
return false;
}
}
else
{
transaction = default(BlockTx);
return false;
}
}
public static byte[] EncodeBlockTx(BlockTx blockTx)
{
using (var stream = new MemoryStream())
using (var writer = new BinaryWriter(stream))
{
EncodeBlockTx(writer, blockTx);
return stream.ToArray();
}
}
public static void EncodeBlockTx(BinaryWriter writer, BlockTx blockTx)
{
var txBytes = blockTx.Transaction != null ? EncodeTransaction(blockTx.Transaction) : new byte[0];
writer.WriteInt32(blockTx.Index);
writer.WriteInt32(blockTx.Depth);
writer.WriteUInt256(blockTx.Hash);
writer.WriteBool(blockTx.Pruned);
if (!blockTx.Pruned)
EncodeTransaction(writer, blockTx.Transaction);
}
public void ValidationTransactionScript(Chain newChain, BlockTx tx, TxInput txInput, int txInputIndex, PrevTxOutput prevTxOutput)
{
var chainedHeader = newChain.LastBlock;
// BIP16 didn't become active until Apr 1 2012
var nBIP16SwitchTime = DateTimeOffset.FromUnixTimeSeconds(1333238400U);
var strictPayToScriptHash = chainedHeader.Time >= nBIP16SwitchTime;
var flags = strictPayToScriptHash ? verify_flags_type.verify_flags_p2sh : verify_flags_type.verify_flags_none;
// Start enforcing the DERSIG (BIP66) rules, for block.nVersion=3 blocks,
// when 75% of the network has upgraded:
if (chainedHeader.Version >= 3
&& IsSuperMajority(3, newChain, ChainParams.MajorityEnforceBlockUpgrade))
{
flags |= verify_flags_type.verify_flags_dersig;
}
// Start enforcing CHECKLOCKTIMEVERIFY, (BIP65) for block.nVersion=4
// blocks, when 75% of the network has upgraded:
if (chainedHeader.Version >= 4
&& IsSuperMajority(4, newChain, ChainParams.MajorityEnforceBlockUpgrade))
{
flags |= verify_flags_type.verify_flags_checklocktimeverify;
}
var result = LibbitcoinConsensus.VerifyScript(
tx.TxBytes,
prevTxOutput.ScriptPublicKey,
txInputIndex,
flags);
if (!result)
{
logger.Debug($"Script did not pass in block: {chainedHeader.Hash}, tx: {tx.Index}, {tx.Hash}, input: {txInputIndex}");
throw new ValidationException(chainedHeader.Hash);
}
}
public void TestUtxoLookAheadOrdering()
{
var deferredCursor = new Mock<IDeferredChainStateCursor>();
deferredCursor.Setup(x => x.CursorCount).Returns(4);
var blockTxes = new BufferBlock<BlockTx>();
var lookAhead = UtxoLookAhead.LookAhead(blockTxes, deferredCursor.Object);
var blockTx0 = new BlockTx(0, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
var blockTx1 = new BlockTx(1, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
var blockTx2 = new BlockTx(2, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
var blockTx3 = new BlockTx(3, RandomData.RandomTransaction(new RandomDataOptions { TxInputCount = 2 }));
// setup events so that transactions finish in 0, 3, 1, 2 order
using (var blockTx1ReadEvent = new ManualResetEventSlim())
using (var blockTx2ReadEvent = new ManualResetEventSlim())
using (var blockTx3ReadEvent = new ManualResetEventSlim())
{
deferredCursor.Setup(x => x.WarmUnspentTx(blockTx1.Transaction.Inputs[0].PreviousTxOutputKey.TxHash))
.Callback(() =>
{
blockTx3ReadEvent.Wait();
blockTx1ReadEvent.Set();
});
deferredCursor.Setup(x => x.WarmUnspentTx(blockTx2.Transaction.Inputs[0].PreviousTxOutputKey.TxHash))
.Callback(() =>
{
blockTx3ReadEvent.Wait();
blockTx1ReadEvent.Wait();
blockTx2ReadEvent.Set();
});
deferredCursor.Setup(x => x.WarmUnspentTx(blockTx3.Transaction.Inputs[0].PreviousTxOutputKey.TxHash))
.Callback(() =>
{
blockTx3ReadEvent.Set();
});
blockTxes.Post(blockTx0);
blockTxes.Post(blockTx1);
blockTxes.Post(blockTx2);
blockTxes.Post(blockTx3);
blockTxes.Complete();
// verify each transaction was forwarded, in the correct order
var expectedBlockTxes = new[] { blockTx0, blockTx1, blockTx2, blockTx3 };
var warmedTxes = lookAhead.ReceiveAllAsync().Result;
Assert.AreEqual(4, warmedTxes.Count);
CollectionAssert.AreEqual(expectedBlockTxes.Select(x => x.Transaction.Hash).ToList(), warmedTxes.Select(x => x.Transaction.Hash).ToList());
}
Assert.IsTrue(lookAhead.Completion.Wait(2000));
}
