public IActionResult GetBalancesOverAmount(int blockHeight, decimal amount)
{
Money thresholdBalance = Money.Coins(amount);
CoinviewContext coinView = GetCoinviewAtHeight(blockHeight);
Dictionary <Script, Money> balances = GetBalances(coinView);
List <Script> addressesWithThreshold = balances
.Where(x => x.Value >= thresholdBalance)
.Select(x => x.Key)
.ToList();
List <string> base58Addresses = new List <string>();
foreach (Script script in addressesWithThreshold)
{
GetSenderResult senderResult = this.GetAddressFromScript(script);
if (senderResult.Success)
{
base58Addresses.Add(senderResult.Sender.ToBase58Address(this.network));
}
else
{
this.logger.LogWarning($"{script} has a balance of {balances[script]} but is not a P2PK or P2PKH.");
}
}
return(Json(base58Addresses));
}
private void AdjustCoinviewForBlock(Block block, CoinviewContext coinView)
{
foreach (Transaction tx in block.Transactions)
{
// Add outputs
for (int i = 0; i < tx.Outputs.Count; i++)
{
TxOut output = tx.Outputs[i];
if (output.Value > 0)
{
coinView.UnspentOutputs.Add(new OutPoint(tx, i));
coinView.Transactions[tx.GetHash()] = tx;
}
}
// Spend inputs
if (!tx.IsCoinBase)
{
foreach (TxIn txIn in tx.Inputs)
{
if (!coinView.UnspentOutputs.Remove(txIn.PrevOut))
{
throw new Exception("Spending PrevOut that isn't in Coinview at this time.");
}
}
}
}
}
private CoinviewContext GetCoinviewAtHeight(int blockHeight)
{
var coinView = new CoinviewContext();
const int batchSize = 1000;
IEnumerable <ChainedHeader> allBlockHeaders = this.chainIndexer.EnumerateToTip(this.chainIndexer.Genesis);
int totalBlocksCounted = 0;
int i = 0;
while (true)
{
List <ChainedHeader> headers = allBlockHeaders.Skip(i * batchSize).Take(batchSize).ToList();
List <Block> blocks = this.blockStore.GetBlocks(headers.Select(x => x.HashBlock).ToList());
foreach (Block block in blocks)
{
this.AdjustCoinviewForBlock(block, coinView);
totalBlocksCounted += 1;
// We have reached the blockheight asked for
if (totalBlocksCounted >= blockHeight)
{
break;
}
}
// We have seen every block up to the tip or our blockheight
if (headers.Count < batchSize || totalBlocksCounted >= blockHeight)
{
break;
}
// Give the user some feedback every 10k blocks
if (i % 10 == 9)
{
this.logger.LogInformation($"Counted {totalBlocksCounted} blocks for balance calculation.");
}
i++;
}
return(coinView);
}
private Dictionary <Script, Money> GetBalances(CoinviewContext coinView)
{
return(coinView.UnspentOutputs.Select(x => coinView.Transactions[x.Hash].Outputs[x.N]) // Get the full output data for each known unspent output.
.GroupBy(x => x.ScriptPubKey) // Group them by Script aka address.
.ToDictionary(x => x.Key, x => (Money)x.Sum(y => y.Value))); // Find the total value owned by this address.
}
