I am trying to check the balance of a given Bitcoin address by using ONLY the locally stored blockchain (downloaded via Bitcoin Core). Something similar to this (by using NBitCoin and/or QBitNinja), but without needing access to the network:
private static readonly QBitNinjaClient client = new QBitNinjaClient(Network.Main);
public decimal CheckBalance(BitcoinPubKeyAddress address)
{
var balanceModel = client.GetBalance(address, true).Result;
decimal balance = 0;
if (balanceModel.Operations.Count > 0)
{
var unspentCoins = new List<Coin>();
foreach (var operation in balanceModel.Operations)
unspentCoins.AddRange(operation.ReceivedCoins.Select(coin => coin as Coin));
balance = unspentCoins.Sum(x => x.Amount.ToDecimal(MoneyUnit.BTC));
}
return balance;
}
The example above needs access to the network. I need to do the same thing offline. I came up with something like this, but obviously it doesn't work:
public decimal CheckBalanceLocal(BitcoinPubKeyAddress address)
{
var node = Node.ConnectToLocal(Network.Main);
node.VersionHandshake();
var chain = node.GetChain();
var store = new BlockStore(@"F:\Program Files\Bitcoin\Cache\blocks", Network.Main);
var index = new IndexedBlockStore(new InMemoryNoSqlRepository(), store);
index.ReIndex();
var headers = chain.ToEnumerable(false).ToArray();
var balance = (
from header in headers
select index.Get(header.HashBlock)
into block
from tx in block.Transactions
from txout in tx.Outputs
where txout.ScriptPubKey.GetDestinationAddress(Network.Main) == address
select txout.Value.ToDecimal(MoneyUnit.BTC)).Sum();
return balance;
}
- It hangs during the query
- I want something instead of
InMemoryNoSqlRepositoryto be stored in a file in order to prevent usingReIndex()which slows everything down
My requirement is to Check Balance the same way as in the first method but by querying blocks stored on my disk.
Actually what I require might just be an answer to this question:
