public async override Task <Result <ITxPoint> > GetInputAsync(
string txId,
uint inputNo,
CancellationToken cancellationToken = default)
{
await RequestLimitControl
.Wait(cancellationToken)
.ConfigureAwait(false);
var requestUri = $"api/tx/{txId}";
return(await HttpHelper.GetAsyncResult <ITxPoint>(
baseUri : BaseUri,
requestUri : requestUri,
responseHandler : (response, content) =>
{
var tx = JsonConvert.DeserializeObject <Tx>(content);
var txIn = tx.Inputs[(int)inputNo];
var txInput = new BitcoinBasedTxPoint(new IndexedTxIn
{
TxIn = new TxIn(new OutPoint(new uint256(txIn.TxId), txIn.VOut),
Script.FromHex(txIn.ScriptSig.Hex)),
Index = txIn.N,
//WitScript = null,
});
return txInput;
},
cancellationToken : cancellationToken)
.ConfigureAwait(false));
}
private async void PaymentSpentEventHandler(
Swap swap,
ITxPoint spentPoint,
CancellationToken cancellationToken = default)
{
Log.Debug("Handle payment spent event for swap {@swapId}", swap.Id);
try
{
var soldCurrency = Currencies.GetByName(swap.SoldCurrency);
BitcoinBasedTxPoint spentTxInput = null;
var attempts = 0;
while (attempts < MaxInputGettingAttemps)
{
attempts++;
var inputResult = await((IInOutBlockchainApi)soldCurrency.BlockchainApi)
.TryGetInputAsync(spentPoint.Hash, spentPoint.Index, cancellationToken: cancellationToken)
.ConfigureAwait(false);
if (inputResult == null || (inputResult.HasError && inputResult.Error?.Code == Errors.RequestError))
{
await Task.Delay(TimeSpan.FromSeconds(InputGettingIntervalInSec), cancellationToken)
.ConfigureAwait(false);
continue;
}
if (inputResult.HasError)
{
throw new InternalException(inputResult.Error.Code, inputResult.Error.Description);
}
spentTxInput = inputResult.Value as BitcoinBasedTxPoint;
if (spentTxInput == null)
{
throw new InternalException(Errors.InvalidSpentPoint, "Spent point is not bitcoin based tx point");
}
break;
}
var secret = spentTxInput
.ExtractAllPushData()
.FirstOrDefault(d =>
d.Length == DefaultSecretSize &&
CreateSwapSecretHash(d).SequenceEqual(swap.SecretHash));
if (secret != null)
{
swap.Secret = secret;
RaiseSwapUpdated(swap, SwapStateFlags.HasSecret);
if (swap.IsAcceptor)
{
RaiseAcceptorPaymentSpent(swap);
}
}
else if (spentTxInput.IsRefund())
{
RefundConfirmedEventHandler(swap, null, cancellationToken);
}
else
{
throw new InternalException(
Errors.InvalidSpentPoint,
$"Unknown redeem or refund script for output {spentPoint.Hash}:{spentPoint.Index}");
}
}
catch (Exception e)
{
Log.Error(e, "Error while handle payment tx spent event");
}
}
