private void AdjustCoinviewForBlock(Block block, ReconstructedCoinviewContext coinView)
{
foreach (Transaction tx in block.Transactions)
{
// Add outputs
for (int i = 0; i < tx.Outputs.Count; i++)
{
TxOut output = tx.Outputs[i];
if (output.Value <= 0 || output.ScriptPubKey.IsUnspendable)
{
continue;
}
coinView.UnspentOutputs.Add(new OutPoint(tx, i));
coinView.Transactions[tx.GetHash()] = tx;
}
// Spend inputs. Coinbases are special in that they don't reference previous transactions for their inputs, so ignore them.
if (tx.IsCoinBase)
{
continue;
}
foreach (TxIn txIn in tx.Inputs)
{
// TODO: This is inefficient because the Transactions dictionary entry does not get deleted, so extra memory gets used
if (!coinView.UnspentOutputs.Remove(txIn.PrevOut))
{
throw new Exception("Attempted to spend a prevOut that isn't in the coinview at this time.");
}
}
}
}
public ReconstructedCoinviewContext GetCoinviewAtHeight(int blockHeight)
{
var coinView = new ReconstructedCoinviewContext();
// TODO: Make this a command line option
const int batchSize = 1000;
IEnumerable <ChainedHeader> allBlockHeaders = this.chainIndexer.EnumerateToTip(this.chainIndexer.Genesis);
int totalBlocksCounted = 0;
int i = 0;
while (true)
{
List <ChainedHeader> headers = allBlockHeaders.Skip(i * batchSize).Take(batchSize).ToList();
List <Block> blocks = this.blockStore.GetBlocks(headers.Select(x => x.HashBlock).ToList());
foreach (Block block in blocks)
{
this.AdjustCoinviewForBlock(block, coinView);
totalBlocksCounted += 1;
// We have reached the block height asked for.
if (totalBlocksCounted >= blockHeight)
{
break;
}
}
// We have seen every block up to the tip or the chosen block height.
if (headers.Count < batchSize || totalBlocksCounted >= blockHeight)
{
break;
}
// Give the user some feedback every 10k blocks
if (i % 10 == 9)
{
this.logger.LogInformation($"Processed {totalBlocksCounted} blocks for UTXO indexing.");
}
i++;
}
return(coinView);
}
