private async Task ProcessTxIds <T>(
TxIds message,
Blockchain <T> blockchain,
CancellationToken cancellationToken = default(CancellationToken))
where T : IAction
{
_logger.Debug("Trying to fetch txs...");
IEnumerable <TxId> unknownTxIds = message.Ids
.Where(id => !blockchain.Transactions.ContainsKey(id));
if (!(message.Identity is Address from))
{
throw new NullReferenceException(
"TxIds doesn't have sender address.");
}
if (!_dealers.TryGetValue(from, out DealerSocket sock))
{
_logger.Information(
"TxIds was sent from unknown peer. ignored.");
return;
}
IAsyncEnumerable <Transaction <T> > fetched =
GetTxsAsync <T>(sock, unknownTxIds, cancellationToken);
var toStage = new HashSet <Transaction <T> >(
await fetched.ToListAsync(cancellationToken));
blockchain.StageTransactions(toStage);
TxReceived.Set();
_logger.Debug("Txs staged successfully.");
}
internal async Task BroadcastTxsAsync <T>(
IEnumerable <Transaction <T> > txs,
CancellationToken cancellationToken = default(CancellationToken))
where T : IAction
{
_logger.Debug("Broadcast Txs.");
var message = new TxIds(txs.Select(tx => tx.Id));
await BroadcastMessage(
message.ToNetMQMessage(_privateKey),
TimeSpan.FromMilliseconds(300),
cancellationToken);
}
void GetTransactions(ExtKey key)
{
List <TxId> txIds = new List <TxId>();
List <uint256> Inputs = new List <uint256>();
var balance = Spend.Api.GetBalance(key.PrivateKey.GetWif(Spend.Api.Network).GetAddress(ScriptPubKeyType.Legacy).ScriptPubKey, false).Result;
foreach (var op in balance.Operations)
{
TxId txid = new TxId(op.TransactionId)
{
Status = Node.TxStatus.Spent
};
foreach (var coin in op.ReceivedCoins)
{
if (coin.TxOut.ScriptPubKey == key.PrivateKey.ScriptPubKey)
{
txid.MoneyIn += (Money)coin.Amount;
}
}
var transactionResponse = Spend.Api.GetTransaction(op.TransactionId).Result;
Transaction transaction = transactionResponse.Transaction;
var inputs = transaction.Inputs;
foreach (TxIn input in inputs)
{
OutPoint previousOutpoint = input.PrevOut;
if (input.ScriptSig == key.PrivateKey.ScriptPubKey)
{
Inputs.Add(previousOutpoint.Hash);
}
}
if (txid.MoneyIn != Money.Zero)
{
txIds.Add(txid);
}
}
foreach (TxId txId in txIds)
{
if (!(Inputs.Contains(txId.TransactionId))) //|| txId.MoneyOut == Money.Zero))
{
TxIds.Add(txId);
}
}
}
private void ProcessTxIds(TxIds message)
{
if (!(message.Remote is BoundPeer peer))
{
_logger.Information(
$"Ignores a {nameof(TxIds)} message because it was sent by an invalid peer: " +
"{PeerAddress}.",
message.Remote?.Address.ToHex()
);
return;
}
_logger.Debug(
$"Received a {nameof(TxIds)} message: {{@TxIds}}.",
message.Ids.Select(txid => txid.ToString())
);
TxCompletion.Demand(peer, message.Ids);
}
private void ProcessTxIds(TxIds message)
{
if (!(message.Remote is BoundPeer peer))
{
_logger.Information(
"Ignoring a {MessageType} message because it was sent by an invalid peer: " +
"{PeerAddress}.",
nameof(Messages.TxIds),
message.Remote?.Address.ToHex()
);
return;
}
_logger.Debug(
"Received a {MessageType} message with {TxIdCount} txIds.",
nameof(Messages.TxIds),
message.Ids.Count()
);
TxCompletion.Demand(peer, message.Ids);
}
private void ProcessTxIds(TxIds message)
{
if (!(message.Remote is BoundPeer peer))
{
_logger.Information(
$"Ignores a {nameof(TxIds)} message because it was sent by an invalid peer: " +
"{PeerAddress}.",
message.Remote?.Address.ToHex()
);
return;
}
_logger.Debug(
$"Received a {nameof(TxIds)} message: {{@TxIds}}.",
message.Ids.Select(txid => txid.ToString())
);
IStagePolicy <T> stagePolicy = BlockChain.StagePolicy;
ImmutableHashSet <TxId> newTxIds = message.Ids
.Where(id => !_demandTxIds.ContainsKey(id))
.Where(id => !stagePolicy.HasStaged(BlockChain, id, true))
.ToImmutableHashSet();
if (!newTxIds.Any())
{
_logger.Debug("No unaware transactions to receive.");
return;
}
_logger.Debug(
"Unaware transactions to receive: {@TxIds}.",
newTxIds.Select(txid => txid.ToString())
);
foreach (TxId txid in newTxIds)
{
_demandTxIds.TryAdd(txid, peer);
}
}
public KeyTx(SpendTx spend, ExtKey spendKey, ExtKey changeKey, Money minerFee)
{
Spend = spend;
MinerFee = minerFee;
PaymentAddress = spendKey.PrivateKey.GetWif(Spend.Api.Network).GetAddress(ScriptPubKeyType.Legacy).ToString();
Tx = Transaction.Create(Spend.Api.Network);
var ReceiverAddress = BitcoinAddress.Create(Spend.ToAddress, Spend.Api.Network);
Tx.Outputs.Add(SpendAmount, ReceiverAddress.ScriptPubKey);
Tx.Outputs.Add(ChangeAmount, changeKey.PrivateKey.GetWif(Spend.Api.Network).GetAddress(ScriptPubKeyType.Legacy).ScriptPubKey);
if (Spend.TxMessage.Length > 0)
{
Tx.Outputs.Add(Money.Zero, TxNullDataTemplate.Instance.GenerateScriptPubKey(Encoding.UTF8.GetBytes(Spend.TxMessage)));
}
GetTransactions(spendKey);
List <TxId> inputs = new List <TxId>();
foreach (var txId in TxIds)
{
if (!AddTransaction(spendKey, txId))
{
continue;
}
else
{
inputs.Add(txId);
}
var totalSpend = Spend.SpendAmount + TxInAmount - MinerFee;
var remainingAmount = Spend.TargetAmount - totalSpend;
SpendAmount = remainingAmount > Money.Zero ? TxInAmount - MinerFee : TxInAmount - MinerFee + remainingAmount;
ChangeAmount = TxInAmount - SpendAmount - MinerFee;
if (Spend.TargetAmount <= (Spend.TxInAmount + TxInAmount - Spend.MinerFee - MinerFee))
{
break;
}
}
List <TxId> unusedTx = TxIds.Where(tx => !inputs.Contains(tx)).ToList();
foreach (var tx in unusedTx)
{
TxIds.Remove(tx);
}
Tx.Outputs.Clear();
Tx.Outputs.Add(SpendAmount, ReceiverAddress.ScriptPubKey);
if (ChangeAmount > Money.Zero)
{
Tx.Outputs.Add(ChangeAmount, changeKey.PrivateKey.GetWif(Spend.Api.Network).GetAddress(ScriptPubKeyType.Legacy).ScriptPubKey);
}
if (Spend.TxMessage.Length > 0)
{
Tx.Outputs.Add(Money.Zero, TxNullDataTemplate.Instance.GenerateScriptPubKey(Encoding.UTF8.GetBytes(Spend.TxMessage)));
}
Tx.Sign(spendKey.PrivateKey.GetBitcoinSecret(Spend.Api.Network), coins.ToArray());
}