public static byte[] EncodeBlockTxNode(BlockTxNode blockTx)
{
using (var stream = new MemoryStream())
using (var writer = new BinaryWriter(stream))
{
EncodeBlockTxNode(writer, blockTx);
return(stream.ToArray());
}
}
public static void EncodeBlockTxNode(BinaryWriter writer, BlockTxNode blockTx)
{
writer.WriteInt32(blockTx.Index);
writer.WriteInt32(blockTx.Depth);
writer.WriteUInt256(blockTx.Hash);
writer.WriteBool(blockTx.Pruned);
if (!blockTx.Pruned)
{
writer.WriteBytes(blockTx.TxBytes.ToArray());
}
}
// IBlockTxesStorage.PruneElements
private void TestPruneElements(ITestStorageProvider provider)
{
// run 4 iterations of pruning: no adjacent blocks, one adjacent block on either side, and two adjacent blocks
for (var iteration = 0; iteration < 4; iteration++)
{
provider.TestCleanup();
using (var kernel = new StandardKernel())
using (var storageManager = provider.OpenStorageManager())
{
// add logging module
kernel.Load(new ConsoleLoggingModule(LogLevel.Debug));
var blockTxesStorage = storageManager.BlockTxesStorage;
// create a block
var block = CreateFakeBlock();
var txCount = block.Transactions.Length;
// determine expected merkle root node when fully pruned
var expectedFinalDepth = (int)Math.Ceiling(Math.Log(txCount, 2));
var expectedFinalElement = new BlockTxNode(index: 0, depth: expectedFinalDepth, hash: block.Header.MerkleRoot, pruned: true, encodedTx: null);
// pick a random pruning order
var random = new Random();
var pruneOrderSource = Enumerable.Range(0, txCount).ToList();
var pruneOrder = new List<int>(txCount);
while (pruneOrderSource.Count > 0)
{
var randomIndex = random.Next(pruneOrderSource.Count);
pruneOrder.Add(pruneOrderSource[randomIndex]);
pruneOrderSource.RemoveAt(randomIndex);
}
// add preceding block
if (iteration == 1 || iteration == 3)
blockTxesStorage.TryAddBlockTransactions(new UInt256(block.Hash.ToBigInteger() - 1), block.BlockTxes);
// add the block to be pruned
blockTxesStorage.TryAddBlockTransactions(block.Hash, block.BlockTxes);
// add proceeding block
if (iteration == 2 || iteration == 3)
blockTxesStorage.TryAddBlockTransactions(new UInt256(block.Hash.ToBigInteger() + 1), block.BlockTxes);
// prune the block
var count = 0;
foreach (var pruneIndex in pruneOrder)
{
Debug.WriteLine(count++);
// prune a transaction
blockTxesStorage.PruneElements(new[] { new KeyValuePair<UInt256, IEnumerable<int>>(block.Hash, new[] { pruneIndex }) });
// read block transactions
IEnumerator<BlockTxNode> blockTxNodes;
Assert.IsTrue(blockTxesStorage.TryReadBlockTxNodes(block.Hash, out blockTxNodes));
// verify block transactions, exception will be fired if invalid
MerkleTree.ReadMerkleTreeNodes(block.Header.MerkleRoot, blockTxNodes.UsingAsEnumerable()).Count();
}
// read fully pruned block and verify
IEnumerator<BlockTxNode> finalBlockTxNodes;
Assert.IsTrue(blockTxesStorage.TryReadBlockTxNodes(block.Hash, out finalBlockTxNodes));
var finalNodes = MerkleTree.ReadMerkleTreeNodes(block.Header.MerkleRoot, finalBlockTxNodes.UsingAsEnumerable()).ToList();
Assert.AreEqual(1, finalNodes.Count);
Assert.AreEqual(expectedFinalElement, finalNodes[0]);
// verify preceding block was not affected
if (iteration == 1 || iteration == 3)
{
Assert.IsTrue(blockTxesStorage.TryReadBlockTxNodes(new UInt256(block.Hash.ToBigInteger() - 1), out finalBlockTxNodes));
// verify block transactions, exception will be fired if invalid
Assert.AreEqual(block.Transactions.Length, MerkleTree.ReadMerkleTreeNodes(block.Header.MerkleRoot, finalBlockTxNodes.UsingAsEnumerable()).Count());
}
// verify proceeding block was not affected
if (iteration == 2 || iteration == 3)
{
Assert.IsTrue(blockTxesStorage.TryReadBlockTxNodes(new UInt256(block.Hash.ToBigInteger() + 1), out finalBlockTxNodes));
// verify block transactions, exception will be fired if invalid
Assert.AreEqual(block.Transactions.Length, MerkleTree.ReadMerkleTreeNodes(block.Header.MerkleRoot, finalBlockTxNodes.UsingAsEnumerable()).Count());
}
}
}
}
// IBlockTxesStorage.PruneElements
private void TestPruneElements(ITestStorageProvider provider)
{
// run 4 iterations of pruning: no adjacent blocks, one adjacent block on either side, and two adjacent blocks
for (var iteration = 0; iteration < 4; iteration++)
{
provider.TestCleanup();
using (var kernel = new StandardKernel())
using (var storageManager = provider.OpenStorageManager())
{
// add logging module
kernel.Load(new ConsoleLoggingModule(LogLevel.Debug));
var blockTxesStorage = storageManager.BlockTxesStorage;
// create a block
var block = CreateFakeBlock();
var txCount = block.Transactions.Length;
// determine expected merkle root node when fully pruned
var expectedFinalDepth = (int)Math.Ceiling(Math.Log(txCount, 2));
var expectedFinalElement = new BlockTxNode(index: 0, depth: expectedFinalDepth, hash: block.Header.MerkleRoot, pruned: true, encodedTx: null);
// pick a random pruning order
var random = new Random();
var pruneOrderSource = Enumerable.Range(0, txCount).ToList();
var pruneOrder = new List <int>(txCount);
while (pruneOrderSource.Count > 0)
{
var randomIndex = random.Next(pruneOrderSource.Count);
pruneOrder.Add(pruneOrderSource[randomIndex]);
pruneOrderSource.RemoveAt(randomIndex);
}
// add preceding block
if (iteration == 1 || iteration == 3)
{
blockTxesStorage.TryAddBlockTransactions(new UInt256(block.Hash.ToBigInteger() - 1), block.BlockTxes);
}
// add the block to be pruned
blockTxesStorage.TryAddBlockTransactions(block.Hash, block.BlockTxes);
// add proceeding block
if (iteration == 2 || iteration == 3)
{
blockTxesStorage.TryAddBlockTransactions(new UInt256(block.Hash.ToBigInteger() + 1), block.BlockTxes);
}
// prune the block
var count = 0;
foreach (var pruneIndex in pruneOrder)
{
Debug.WriteLine(count++);
// prune a transaction
blockTxesStorage.PruneElements(new[] { new KeyValuePair <UInt256, IEnumerable <int> >(block.Hash, new[] { pruneIndex }) });
// read block transactions
IEnumerator <BlockTxNode> blockTxNodes;
Assert.IsTrue(blockTxesStorage.TryReadBlockTxNodes(block.Hash, out blockTxNodes));
// verify block transactions, exception will be fired if invalid
MerkleTree.ReadMerkleTreeNodes(block.Header.MerkleRoot, blockTxNodes.UsingAsEnumerable()).Count();
}
// read fully pruned block and verify
IEnumerator <BlockTxNode> finalBlockTxNodes;
Assert.IsTrue(blockTxesStorage.TryReadBlockTxNodes(block.Hash, out finalBlockTxNodes));
var finalNodes = MerkleTree.ReadMerkleTreeNodes(block.Header.MerkleRoot, finalBlockTxNodes.UsingAsEnumerable()).ToList();
Assert.AreEqual(1, finalNodes.Count);
Assert.AreEqual(expectedFinalElement, finalNodes[0]);
// verify preceding block was not affected
if (iteration == 1 || iteration == 3)
{
Assert.IsTrue(blockTxesStorage.TryReadBlockTxNodes(new UInt256(block.Hash.ToBigInteger() - 1), out finalBlockTxNodes));
// verify block transactions, exception will be fired if invalid
Assert.AreEqual(block.Transactions.Length, MerkleTree.ReadMerkleTreeNodes(block.Header.MerkleRoot, finalBlockTxNodes.UsingAsEnumerable()).Count());
}
// verify proceeding block was not affected
if (iteration == 2 || iteration == 3)
{
Assert.IsTrue(blockTxesStorage.TryReadBlockTxNodes(new UInt256(block.Hash.ToBigInteger() + 1), out finalBlockTxNodes));
// verify block transactions, exception will be fired if invalid
Assert.AreEqual(block.Transactions.Length, MerkleTree.ReadMerkleTreeNodes(block.Header.MerkleRoot, finalBlockTxNodes.UsingAsEnumerable()).Count());
}
}
}
}
private IEnumerator<BlockTxNode> ReadBlockTransactions(UInt256 blockHash, bool requireTx)
{
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);
if (pruned && requireTx)
throw new MissingDataException(blockHash);
var blockTxNode = new BlockTxNode(txIndex, depth, txHash, pruned, txBytes?.ToImmutableArray());
yield return blockTxNode;
}
while (Api.TryMoveNext(cursor.jetSession, cursor.blocksTableId));
}
}
}
public static byte[] EncodeBlockTxNode(BlockTxNode blockTx)
{
using (var stream = new MemoryStream())
using (var writer = new BinaryWriter(stream))
{
EncodeBlockTxNode(writer, blockTx);
return stream.ToArray();
}
}
public static void EncodeBlockTxNode(BinaryWriter writer, BlockTxNode blockTx)
{
writer.WriteInt32(blockTx.Index);
writer.WriteInt32(blockTx.Depth);
writer.WriteUInt256(blockTx.Hash);
writer.WriteBool(blockTx.Pruned);
if (!blockTx.Pruned)
writer.WriteBytes(blockTx.TxBytes.ToArray());
}
private IEnumerator <BlockTxNode> ReadBlockTransactions(UInt256 blockHash, bool requireTx)
{
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);
if (pruned && requireTx)
{
throw new MissingDataException(blockHash);
}
var blockTxNode = new BlockTxNode(txIndex, depth, txHash, pruned, txBytes?.ToImmutableArray());
yield return(blockTxNode);
}while (Api.TryMoveNext(cursor.jetSession, cursor.blocksTableId));
}
}
}