/// <summary>
/// Commits the uncommitted block referenced by its block alias.
/// The hash ID of the future committed block has to be given as argument to the
/// function.
/// </summary>
/// <returns></returns>
public bool CommitBlock(BlockAlias alias, BlockId blockId)
{
if (!RetrieveUncommittedBlock(alias, out var toCommit))
{
throw new ArgumentException($"ID {alias} does not exist or is already committed.");
}
// verify that parent of block to commit is committed itself
if (!RetrieveCommittedBlock(toCommit.Parent, out _) && !blockId.Equals(BlockId.Genesis))
{
throw new ArgumentException($"Parent {toCommit.Parent} is not yet committed.");
}
var blockToCommit = toCommit;
_uncommitted.Remove(toCommit);
var newBlock = new CommittedBlock(blockToCommit.BlockHeight, blockId, blockToCommit.Alias,
blockToCommit.Parent);
_committed.Add(newBlock);
return(true);
}
private bool FindCommitted(Predicate <CommittedBlock> p, out CommittedBlock foundBlock)
{
foundBlock = _committed.FindLast(p);
return(!foundBlock.Equals(default(CommittedBlock)));
}
/// <summary>
/// Returns the block metadata of the committed block
/// identified by the alias given as argument.
/// </summary>
public bool RetrieveCommittedBlock(BlockAlias alias, out CommittedBlock block)
{
return(FindCommitted(b => b.Alias == alias, out block));
}