public async Task <ActionResult <Voucher> > CreateVoucher(string name)
{
var voucher = new Voucher(name);
await _context.Vouchers.AddAsync(voucher);
var voucherId = voucher.Id;
string voucherCode = ConvertIdToVoucherCode(voucherId);
voucher.VoucherCode = voucherCode;
await _context.SaveChangesAsync();
return(voucher);
}
public async Task <ActionResult <PayInvoiceResponse> > PayVoucher(string token, string payreq)
{
Console.WriteLine("CONTROLLERLOG: PayVoucher " + token + " " + payreq);
var voucherItem = await _context.VoucherItems.FindAsync(token);
if (voucherItem == null)
{
return(NotFound());
}
using (var transaction = _context.Database.BeginTransaction())
{
var satCost = await _lightning.SatCost(payreq);
var calculatedFee = await _lightning.getSatFee(payreq);
if (calculatedFee == -1)
{
return(new PayInvoiceResponse
{
PaymentError = "could not find a route",
});
}
var estimatedCost = (ulong)(satCost + calculatedFee);
Console.WriteLine("CONTROLLERLOG: Estimated Cost:" + estimatedCost);
if (estimatedCost > voucherItem.StartSat - voucherItem.UsedSat)
{
return(new PayInvoiceResponse
{
PaymentError = "not enough satoshi on voucher to pay for transaction and network fee"
});
}
Console.WriteLine("CONTROLLERLOG: PayVoucher BEFORE PAYMENT" + token + " " + payreq);
var res = await _lightning.SendPayment(payreq);
Console.WriteLine("CONTROLLERLOG: PayVoucher AFTER PAYMENT" + token + " " + payreq);
if (res.PaymentError != "")
{
_context.Entry(voucherItem).State = EntityState.Unchanged;
return(new PayInvoiceResponse()
{
PaymentError = res.PaymentError
});
}
Console.WriteLine("COST: " + (ulong)(res.PaymentRoute.TotalAmtMsat / 1000));
var realCost = (ulong)(res.PaymentRoute.TotalAmtMsat / 1000);
voucherItem.UsedSat += realCost;
_context.Entry(voucherItem).State = EntityState.Modified;
if (voucherItem.UsedSat >= voucherItem.StartSat)
{
_context.Entry(voucherItem).State = EntityState.Deleted;
}
await _context.SaveChangesAsync();
transaction.Commit();
return(new PayInvoiceResponse()
{
PaymentError = res.PaymentError, PaymentPreimage = res.PaymentPreimage.ToBase64(), PaymentRoute = res.PaymentRoute
});
}
}