public static ChainIndexer Load(this ChainIndexer chainIndexer, BitcoinStream stream)
{
stream.ConsensusFactory = chainIndexer.Network.Consensus.ConsensusFactory;
try
{
int height = 0;
while (true)
{
uint256.MutableUint256 id = null;
stream.ReadWrite <uint256.MutableUint256>(ref id);
BlockHeader header = null;
stream.ReadWrite(ref header);
if (height == 0)
{
Assert.True(header.GetHash() == chainIndexer.Tip.HashBlock);
}
else if (chainIndexer.Tip.HashBlock == header.HashPrevBlock && !(header.IsNull && header.Nonce == 0))
{
chainIndexer.Add(new ChainedHeader(header, id.Value, chainIndexer.Tip));
}
else
{
break;
}
height++;
}
}
catch (EndOfStreamException)
{
}
return(chainIndexer);
}
public void Query_Range_During_Reorg_Success(int chainLength, int start, int?end)
{
// Simulate a reorg occuring mid-enumeration and check that the query still returns the full old chain.
var chainIndexer = new ChainIndexer(this.network);
ChainedHeader[] chainBeforeReorg = this.CreateChain(chainIndexer.Genesis, chainLength);
// Create a new reorg that removes 3 blocks and adds another 5.
ChainedHeader[] chainAfterReorg = this.CreateChain(chainBeforeReorg[chainLength - 3], 5);
chainIndexer.Initialize(chainBeforeReorg.Last());
var query = new ChainIndexerRangeQuery(chainIndexer);
IEnumerator <ChainedHeader> enumerator = query.EnumerateRange(start, end).GetEnumerator();
int position = start;
while (position < (end ?? chainBeforeReorg.Length))
{
enumerator.MoveNext();
ChainedHeader item = enumerator.Current;
// Trigger a reorg at position chainLength - 3
if (position == chainLength - 3)
{
// Remove two headers.
chainIndexer.Remove(chainIndexer.Tip);
chainIndexer.Remove(chainIndexer.Tip);
// Add the reorged chain's headers.
// Note: Most likely is that headers are removed only before the enumeration is completed.
chainIndexer.Add(chainAfterReorg[1]);
chainIndexer.Add(chainAfterReorg[2]);
chainIndexer.Add(chainAfterReorg[3]);
chainIndexer.Add(chainAfterReorg[4]);
}
Assert.Equal(chainBeforeReorg[position], item);
position++;
}
enumerator.Dispose();
}
public static ChainedHeaderBlock[] GetBlocks(int count, ChainIndexer chainIndexer, Func <int, ChainedHeaderBlock> block, ChainedHeader previousHeader = null)
{
ChainedHeader previous = null;
if (previousHeader != null)
{
previous = previousHeader;
}
return(Enumerable.Range(0, count).Select(i =>
{
ChainedHeaderBlock chainedHeaderBlock = block(i);
chainedHeaderBlock.ChainedHeader.SetPrivatePropertyValue("Previous", previous);
previous = chainedHeaderBlock.ChainedHeader;
chainIndexer.Add(chainedHeaderBlock.ChainedHeader);
return chainedHeaderBlock;
}).ToArray());
}
