public long GetLatestConfirmedHeight()
{
var dac = new BlockDac();
var block = dac.SelectLastConfirmed();
if (block != null)
{
return(block.Height);
}
else
{
return(-1);
}
}
public void ProcessUncsonfirmedBlocks()
{
var blockDac = new BlockDac();
var txDac = new TransactionDac();
var txComponent = new TransactionComponent();
var utxoComponent = new UtxoComponent();
long lastHeight = this.GetLatestHeight();
long confirmedHeight = -1;
var confirmedBlock = blockDac.SelectLastConfirmed();
var confirmedHash = Base16.Encode(HashHelper.EmptyHash());
if (confirmedBlock != null)
{
confirmedHeight = confirmedBlock.Height;
confirmedHash = confirmedBlock.Hash;
}
if (lastHeight - confirmedHeight >= 6)
{
var blocks = blockDac.SelectByPreviousHash(confirmedHash);
if (blocks.Count == 1)
{
blockDac.UpdateBlockStatusToConfirmed(blocks[0].Hash);
this.ProcessUncsonfirmedBlocks();
}
else if (blocks.Count > 1)
{
var countOfDescendants = new Dictionary <string, long>();
foreach (var block in blocks)
{
var count = blockDac.CountOfDescendants(block.Hash);
if (!countOfDescendants.ContainsKey(block.Hash))
{
countOfDescendants.Add(block.Hash, count);
}
}
var dicSort = countOfDescendants.OrderBy(d => d.Value).ToList();
var lastItem = blocks.Where(b => b.Hash == dicSort[dicSort.Count - 1].Key).First();
var index = 0;
while (index < dicSort.Count - 1)
{
var currentItem = blocks.Where(b => b.Hash == dicSort[index].Key).First();
if (lastHeight - currentItem.Height >= 6)
{
var txList = txDac.SelectByBlockHash(currentItem.Hash);
//Skip coinbase tx
for (int i = 1; i < txList.Count; i++)
{
var tx = txList[i];
var txMsg = txComponent.ConvertTxEntityToMsg(tx);
txComponent.AddTransactionToPool(txMsg);
}
//remove coinbase from utxo
UtxoSet.Instance.RemoveUtxoRecord(txList[0].Hash, 0);
blockDac.UpdateBlockStatusToDiscarded(currentItem.Hash);
index++;
}
else
{
break;
}
}
if (dicSort.Count - index <= 1)
{
blockDac.UpdateBlockStatusToConfirmed(lastItem.Hash);
this.ProcessUncsonfirmedBlocks();
}
}
}
}