private void IncludeNextBlock()
{
BlockSelector selector = new BlockSelector
{
IsInBestHeaderChain = true,
Heights = new int[] {node.Blockchain.State.BestChain.Height + 1},
Order = BlockSelector.SortOrder.Height,
Direction = BlockSelector.SortDirection.Asc
};
StoredBlock nextBlock = node.Blockchain.FindFirst(selector);
if (nextBlock != null && nextBlock.HasContent)
{
node.Blockchain.Include(nextBlock.Hash);
// this block can be not the last one available for inclusion
resumeEvent.Set();
}
}
public StoredBlock FindFirst(BlockSelector selector)
{
return storage.FindFirst(selector);
}
public List<StoredBlock> Find(BlockSelector selector, int count)
{
return storage.Find(selector, count);
}
/// <summary>
/// Finds first block that matches a given selector.
/// </summary>
/// <param name="selector">The selector.</param>
/// <returns>The first block that matches selector; or null if there is no such block.</returns>
/// <exception cref="ArgumentException">If the sort order is not defined.</exception>
public StoredBlock FindFirst(BlockSelector selector)
{
//todo: use transaction?
lock (blockchainLock)
{
return blockchain.FindFirst(selector);
}
}
private void RevertBlockchain()
{
BlockSelector selector = new BlockSelector();
selector.IsInBestHeaderChain = true;
selector.IsInBestBlockChain = true;
selector.Order = BlockSelector.SortOrder.Height;
selector.Direction = BlockSelector.SortDirection.Desc;
StoredBlock lastBlockToKeep = node.Blockchain.FindFirst(selector);
//todo: revert block, restore mempool
bool reverted;
try
{
reverted = node.Blockchain.TruncateTo(lastBlockToKeep.Hash);
}
catch (InvalidOperationException e)
{
// this exception should not happen, since only one thread updates blockchain
logger.Error(e, $"Failed to revert blockchain to block '{BitConverter.ToString(lastBlockToKeep.Hash)}'.");
return;
}
if (!reverted)
{
node.Blockchain.Truncate();
}
}
