static readonly int MaxBlocks = 70; // The maximum number of blocks that may be cached.
public IEnumerable <NBitcoin.Block> GetBlocks(IEnumerable <NBitcoin.uint256> hashes, CancellationToken cancellationToken)
{
var asked = hashes.ToList();
if (asked.Count > MaxBlocks) // Asked for more than fit in the cache size, no point in checking cache.
{
return(_Repo.GetBlocks(hashes, cancellationToken)); // Fetch from repo instead.
}
var lastAsked = _LastAsked;
if (lastAsked != null && asked.SequenceEqual(lastAsked.Select(a => a.Item1)))
{
return(lastAsked.Select(l => l.Item2));
}
var blocks = _Repo.GetBlocks(hashes, cancellationToken).ToList();
if (blocks.Count < 5) // Shouldn't this number match 'MaxBlocks = 70' ?
{
_LastAsked = blocks.Select(b => Tuple.Create(b.GetHash(), b)).ToList();
}
else
{
_LastAsked = null;
}
return(blocks);
}
public IEnumerable <NBitcoin.Block> GetBlocks(IEnumerable <NBitcoin.uint256> hashes, CancellationToken cancellation)
{
var asked = hashes.ToList();
if (asked.Count > MaxBlocks)
{
return(_Repo.GetBlocks(hashes, cancellation));
}
var lastAsked = _LastAsked;
if (lastAsked != null && asked.SequenceEqual(lastAsked.Select(a => a.Item1)))
{
return(lastAsked.Select(l => l.Item2));
}
var blocks = _Repo.GetBlocks(hashes, cancellation).ToList();
if (blocks.Count < 5)
{
_LastAsked = blocks.Select(b => Tuple.Create(b.GetHash(), b)).ToList();
}
else
{
_LastAsked = null;
}
return(blocks);
}
public IEnumerator <BlockInfo> GetEnumerator()
{
Queue <DateTime> lastLogs = new Queue <DateTime>();
Queue <int> lastHeights = new Queue <int>();
var fork = _BlockHeaders.FindFork(_Checkpoint.BlockLocator);
var headers = _BlockHeaders.EnumerateAfter(fork);
headers = headers.Where(h => h.Height <= ToHeight);
var first = headers.FirstOrDefault();
if (first == null)
{
yield break;
}
var height = first.Height;
if (first.Height == 1)
{
headers = new[] { fork }.Concat(headers);
height = 0;
}
foreach (var block in _BlocksRepository.GetBlocks(headers.Select(b => b.HashBlock), CancellationToken))
{
var header = _BlockHeaders.GetBlock(height);
if (block == null)
{
var storeTip = _BlocksRepository.GetStoreTip();
if (storeTip != null)
{
// Store is caught up with Chain but the block is missing from the store.
if (header.Header.BlockTime <= storeTip.Header.BlockTime)
{
throw new InvalidOperationException($"Chained block not found in store (height = { height }). Re-create the block store.");
}
}
// Allow Store to catch up with Chain.
break;
}
_LastProcessed = header;
yield return(new BlockInfo()
{
Block = block,
BlockId = header.HashBlock,
Height = header.Height
});
IndexerTrace.Processed(height, Math.Min(ToHeight, _BlockHeaders.Tip.Height), lastLogs, lastHeights);
height++;
}
}
public IEnumerator <BlockInfo> GetEnumerator()
{
Queue <DateTime> lastLogs = new Queue <DateTime>();
Queue <int> lastHeights = new Queue <int>();
var fork = _BlockHeaders.FindFork(_Checkpoint.BlockLocator);
_LastProcessed = fork;
var headers = _BlockHeaders.EnumerateAfter(fork);
headers = headers.Where(h => h.Height >= FromHeight && h.Height <= ToHeight);
var first = headers.FirstOrDefault();
if (first == null)
{
yield break;
}
var height = first.Height;
if (first.Height == 1)
{
headers = new[] { fork }.Concat(headers);
height = 0;
}
foreach (var block in _BlocksRepository.GetBlocks(headers.Select(b => b.HashBlock), CancellationToken).TakeWhile(b => b != null))
{
var header = _BlockHeaders.GetBlock(height);
_LastProcessed = header;
yield return(new BlockInfo()
{
Block = block,
BlockId = header.HashBlock,
Height = header.Height
});
IndexerTrace.Processed(height, Math.Min(ToHeight, _BlockHeaders.Tip.Height), lastLogs, lastHeights);
height++;
}
}