public async Task <PaymentDetail> CreatePayment(Guid gatewayId, decimal amount,
string currency, string reference, string memo)
{
_logger.LogInformation(ServerEventId.CreatePayment, "Gateway {0}, create payment request for {1} [ref: {2}]", gatewayId, amount, reference);
// Create payment request
var gateway = _repository.Gateways().First(x => x.Id == gatewayId);
var paymentRequest = new PaymentRequest(gateway, amount, currency, reference, memo);
await _repository.Add(paymentRequest);
await _repository.Save();
_logger.LogDebug("Payment request {0} created", paymentRequest.PaymentId);
// Convert the amount to BTC
string originalCurrency;
decimal amountBtc;
decimal?conversionRate;
if (string.IsNullOrEmpty(currency) || string.Equals(currency, "BTC", StringComparison.OrdinalIgnoreCase))
{
originalCurrency = null;
amountBtc = amount;
conversionRate = null;
}
else
{
var convertedBtcAmount = _currencyConversionService.ConvertAmount(currency, amount);
originalCurrency = currency;
amountBtc = convertedBtcAmount.AmountBtc;
conversionRate = convertedBtcAmount.ConversionRate;
_logger.LogDebug("Converted {0} {1} to {2} BTC", amount, currency, amountBtc);
}
// Generate the ID of the order and the address
var keyIndex = await _repository.NextKeyIndex(gateway);
if (keyIndex == 0)
{
throw new Exception("Payment index number not set.");
}
var masterPubKey = new BitcoinExtPubKey(gateway.ExtPubKey);
var derivedOrderKey = masterPubKey.ExtPubKey.Derive((uint)keyIndex);
var paymentAddress = derivedOrderKey.PubKey.GetAddress(masterPubKey.Network);
var paymentAddressWif = paymentAddress.ToWif();
_logger.LogDebug("Derived payment address [{0}] '{1}'", keyIndex, paymentAddressWif);
// Save the details
var paymentDetail = new PaymentDetail(paymentRequest,
keyIndex, paymentAddressWif,
amountBtc, originalCurrency, conversionRate);
await _repository.Add(paymentDetail);
await _repository.Save();
// Register address with bitcoin server
_logger.LogDebug("Registering {0} with verification service", paymentAddressWif);
var registered = _verificationService.RegisterPaymentAddress(gateway.GatewayNumber, paymentAddressWif);
_logger.LogDebug("Verification result: {0}", registered);
if (registered)
{
paymentDetail.SetRegistered();
await _repository.Save();
}
return(paymentDetail);
}