private static List <long> GetStaleBlockIds(BitcoinDataLayer bitcoinDataLayer)
{
SummaryBlockDataSet summaryBlockDataSet = bitcoinDataLayer.GetSummaryBlockDataSet();
// KEY: The 256-bit hash of the block
// VALUE: The summary block data as represented by an instance of DBData.SummaryBlockDataSet.BlockRow.
Dictionary <ParserData.ByteArray, SummaryBlockDataSet.SummaryBlockRow> blockDictionary = summaryBlockDataSet.SummaryBlock.ToDictionary(
b => new ParserData.ByteArray(b.BlockHash),
b => b);
SummaryBlockDataSet.SummaryBlockRow lastBlock = summaryBlockDataSet.SummaryBlock.OrderByDescending(b => b.BlockId).First();
ParserData.ByteArray previousBlockHash = ParserData.ByteArray.Empty;
ParserData.ByteArray currentBlockHash = new ParserData.ByteArray(lastBlock.BlockHash);
// A hashset containing the IDs of all active blocks. Active as in not stale.
HashSet <long> activeBlockIds = new HashSet <long>();
// Loop through blocks starting from the last one and going from one block to the next as indicated by PreviousBlockHash.
// Collect all the block IDs for the blocks that we go through in activeBlockIds.
// After this loop, blocks that we did not loop through are stale blocks.
while (currentBlockHash.IsZeroArray() == false)
{
SummaryBlockDataSet.SummaryBlockRow summaryBlockRow;
if (blockDictionary.TryGetValue(currentBlockHash, out summaryBlockRow))
{
// The current block was found in the list of blocks.
activeBlockIds.Add(summaryBlockRow.BlockId);
previousBlockHash = currentBlockHash;
currentBlockHash = new ParserData.ByteArray(summaryBlockRow.PreviousBlockHash);
}
else
{
// The current block was not found in the list of blocks.
// This should never happen for a valid blockchain content.
throw new InvalidBlockchainContentException(string.Format(CultureInfo.InvariantCulture, "Block with hash [{0}] makes a reference to an unknown block with hash: [{1}]", previousBlockHash, currentBlockHash));
}
}
// At this point activeBlockIds contains the IDs of all active blocks.
// Parse the list of all blocks and collect those whose IDs are not in activeBlockIds.
return((from sumaryBlockRow in summaryBlockDataSet.SummaryBlock
where activeBlockIds.Contains(sumaryBlockRow.BlockId) == false
select sumaryBlockRow.BlockId).ToList());
}
private static List<long> GetStaleBlockIds(BitcoinDataLayer bitcoinDataLayer)
{
SummaryBlockDataSet summaryBlockDataSet = bitcoinDataLayer.GetSummaryBlockDataSet();
// KEY: The 256-bit hash of the block
// VALUE: The summary block data as represented by an instance of DBData.SummaryBlockDataSet.BlockRow.
Dictionary<ParserData.ByteArray, SummaryBlockDataSet.SummaryBlockRow> blockDictionary = summaryBlockDataSet.SummaryBlock.ToDictionary(
b => new ParserData.ByteArray(b.BlockHash),
b => b);
SummaryBlockDataSet.SummaryBlockRow lastBlock = summaryBlockDataSet.SummaryBlock.OrderByDescending(b => b.BlockId).First();
ParserData.ByteArray previousBlockHash = ParserData.ByteArray.Empty;
ParserData.ByteArray currentBlockHash = new ParserData.ByteArray(lastBlock.BlockHash);
// A hashset containing the IDs of all active blocks. Active as in not stale.
HashSet<long> activeBlockIds = new HashSet<long>();
// Loop through blocks starting from the last one and going from one block to the next as indicated by PreviousBlockHash.
// Collect all the block IDs for the blocks that we go through in activeBlockIds.
// After this loop, blocks that we did not loop through are stale blocks.
while (currentBlockHash.IsZeroArray() == false)
{
SummaryBlockDataSet.SummaryBlockRow summaryBlockRow;
if (blockDictionary.TryGetValue(currentBlockHash, out summaryBlockRow))
{
// The current block was found in the list of blocks.
activeBlockIds.Add(summaryBlockRow.BlockId);
previousBlockHash = currentBlockHash;
currentBlockHash = new ParserData.ByteArray(summaryBlockRow.PreviousBlockHash);
}
else
{
// The current block was not found in the list of blocks.
// This should never happen for a valid blockchain content.
throw new InvalidBlockchainContentException(string.Format(CultureInfo.InvariantCulture, "Block with hash [{0}] makes a reference to an unknown block with hash: [{1}]", previousBlockHash, currentBlockHash));
}
}
// At this point activeBlockIds contains the IDs of all active blocks.
// Parse the list of all blocks and collect those whose IDs are not in activeBlockIds.
return (from sumaryBlockRow in summaryBlockDataSet.SummaryBlock
where activeBlockIds.Contains(sumaryBlockRow.BlockId) == false
select sumaryBlockRow.BlockId).ToList();
}