// Create from a CBlock, filtering transactions according to filter
// Note that this will call IsRelevantAndUpdate on the filter for each transaction,
// thus the filter will likely be modified.
public MerkleBlock(Block block, BloomFilter filter)
{
header = block.Header;
List <bool> vMatch = new List <bool>();
List <uint256> vHashes = new List <uint256>();
for (uint i = 0; i < block.Transactions.Count; i++)
{
uint256 hash = block.Transactions[(int)i].GetHash();
vMatch.Add(filter.IsRelevantAndUpdate(block.Transactions[(int)i]));
vHashes.Add(hash);
}
_PartialMerkleTree = new PartialMerkleTree(vHashes.ToArray(), vMatch.ToArray());
}
/// <summary>
/// Remove superflous branches
/// </summary>
/// <param name="transaction"></param>
/// <returns></returns>
public PartialMerkleTree Trim(params uint256[] matchedTransactions)
{
PartialMerkleTree trimmed = new PartialMerkleTree();
trimmed.TransactionCount = TransactionCount;
var root = GetMerkleRoot();
foreach (var leaf in root.GetLeafs())
{
MarkToTop(leaf, false);
}
BitWriter flags = new BitWriter();
foreach (var leaf in root.GetLeafs().Where(l => matchedTransactions.Contains(l.Hash)))
{
MarkToTop(leaf, true);
}
trimmed.BuildCore(root, flags);
trimmed.Flags = flags.ToBitArray();
return(trimmed);
}