public Task StartAsync(CancellationToken cancellationToken)
{
leases.Add(_EventAggregator.Subscribe <InvoiceStatusChangedEvent>(async e =>
{
var invoice = await _InvoiceRepository.GetInvoice(null, e.InvoiceId);
// we need to use the status in the event and not in the invoice. The invoice might now be in another status.
if (invoice.FullNotifications)
{
if (e.NewState == "expired" ||
e.NewState == "paid" ||
e.NewState == "invalid" ||
e.NewState == "complete"
)
{
await Notify(invoice);
}
}
if (e.NewState == "confirmed")
{
await Notify(invoice);
}
}));
return(Task.CompletedTask);
}
private async Task UpdateInvoice(string invoiceId)
{
UTXOChanges changes = null;
while (true)
{
try
{
var invoice = await _InvoiceRepository.GetInvoice(null, invoiceId).ConfigureAwait(false);
if (invoice == null)
{
break;
}
var stateBefore = invoice.Status;
var result = await UpdateInvoice(changes, invoice).ConfigureAwait(false);
changes = result.Changes;
if (result.NeedSave)
{
await _InvoiceRepository.UpdateInvoiceStatus(invoice.Id, invoice.Status, invoice.ExceptionStatus).ConfigureAwait(false);
}
var changed = stateBefore != invoice.Status;
if (changed)
{
Logs.PayServer.LogInformation($"Invoice {invoice.Id}: {stateBefore} => {invoice.Status}");
}
var expirationMonitoring = invoice.MonitoringExpiration.HasValue ? invoice.MonitoringExpiration.Value : invoice.InvoiceTime + TimeSpan.FromMinutes(60);
if (invoice.Status == "complete" ||
((invoice.Status == "invalid" || invoice.Status == "expired") && expirationMonitoring < DateTimeOffset.UtcNow))
{
if (await _InvoiceRepository.RemovePendingInvoice(invoice.Id).ConfigureAwait(false))
{
Logs.PayServer.LogInformation("Stopped watching invoice " + invoiceId);
}
break;
}
if (!changed || _Cts.Token.IsCancellationRequested)
{
break;
}
}
catch (OperationCanceledException) when(_Cts.Token.IsCancellationRequested)
{
break;
}
catch (Exception ex)
{
Logs.PayServer.LogError(ex, "Unhandled error on watching invoice " + invoiceId);
await Task.Delay(10000, _Cts.Token).ConfigureAwait(false);
}
}
}
private async Task UpdateInvoice(string invoiceId)
{
UTXOChanges changes = null;
while (true)
{
try
{
var invoice = await _InvoiceRepository.GetInvoice(null, invoiceId, true).ConfigureAwait(false);
if (invoice == null)
{
break;
}
var stateBefore = invoice.Status;
var postSaveActions = new List <Action>();
var result = await UpdateInvoice(changes, invoice, postSaveActions).ConfigureAwait(false);
changes = result.Changes;
if (result.NeedSave)
{
await _InvoiceRepository.UpdateInvoiceStatus(invoice.Id, invoice.Status, invoice.ExceptionStatus).ConfigureAwait(false);
_EventAggregator.Publish(new InvoiceDataChangedEvent()
{
InvoiceId = invoice.Id
});
}
var changed = stateBefore != invoice.Status;
foreach (var saveAction in postSaveActions)
{
saveAction();
}
if (invoice.Status == "complete" ||
((invoice.Status == "invalid" || invoice.Status == "expired") && invoice.MonitoringExpiration < DateTimeOffset.UtcNow))
{
if (await _InvoiceRepository.RemovePendingInvoice(invoice.Id).ConfigureAwait(false))
{
Logs.PayServer.LogInformation("Stopped watching invoice " + invoiceId);
}
break;
}
if (!changed || _Cts.Token.IsCancellationRequested)
{
break;
}
}
catch (OperationCanceledException) when(_Cts.Token.IsCancellationRequested)
{
break;
}
catch (Exception ex)
{
Logs.PayServer.LogError(ex, "Unhandled error on watching invoice " + invoiceId);
await Task.Delay(10000, _Cts.Token).ConfigureAwait(false);
}
}
}