public async Task <RefundResult> ExecuteAsync(string merchantId, string paymentRequestId,
string destinationWalletAddress)
{
IPaymentRequest paymentRequest =
await _paymentRequestService.GetAsync(merchantId, paymentRequestId);
if (paymentRequest == null)
{
throw new RefundValidationException(RefundErrorType.PaymentRequestNotFound);
}
if (!paymentRequest.StatusValidForRefund())
{
throw new RefundValidationException(RefundErrorType.NotAllowedInStatus);
}
IEnumerable <IPaymentRequestTransaction> paymentTxs =
(await _transactionsService.GetByWalletAsync(paymentRequest.WalletAddress)).Where(x => x.IsPayment()).ToList();
if (!paymentTxs.Any())
{
throw new RefundValidationException(RefundErrorType.NoPaymentTransactions);
}
if (paymentTxs.MoreThanOne())
{
throw new RefundValidationException(RefundErrorType.MultitransactionNotSupported);
}
IPaymentRequestTransaction tx = paymentTxs.Single();
bool isValidAddress = string.IsNullOrWhiteSpace(destinationWalletAddress) ||
await _blockchainAddressValidator.Execute(destinationWalletAddress, tx.Blockchain);
if (!isValidAddress)
{
throw new RefundValidationException(RefundErrorType.InvalidDestinationAddress);
}
if (!tx.SourceWalletAddresses.Any())
{
throw new RefundValidationException(RefundErrorType.InvalidDestinationAddress);
}
if (string.IsNullOrWhiteSpace(destinationWalletAddress))
{
if (tx.SourceWalletAddresses.MoreThanOne())
{
throw new RefundValidationException(RefundErrorType.InvalidDestinationAddress);
}
}
//validation finished, refund request accepted
await _paymentRequestService.UpdateStatusAsync(paymentRequest.WalletAddress,
PaymentRequestStatusInfo.RefundInProgress());
TransferResult transferResult;
DateTime refundDueDate;
try
{
TransferCommand refundTransferCommand = Mapper.Map <TransferCommand>(tx,
opts => opts.Items["destinationAddress"] = destinationWalletAddress);
transferResult = await _transferService.ExecuteAsync(refundTransferCommand);
refundDueDate = transferResult.Timestamp.Add(_refundExpirationPeriod);
foreach (var transferResultTransaction in transferResult.Transactions)
{
if (!string.IsNullOrEmpty(transferResultTransaction.Error))
{
await _log.WriteWarningAsync(nameof(RefundService), nameof(ExecuteAsync),
transferResultTransaction.ToJson(), "Transaction failed");
continue;
}
IPaymentRequestTransaction refundTransaction = await _transactionsService.CreateTransactionAsync(
new CreateTransactionCommand
{
Amount = transferResultTransaction.Amount,
AssetId = transferResultTransaction.AssetId,
Confirmations = 0,
Hash = transferResultTransaction.Hash,
WalletAddress = paymentRequest.WalletAddress,
Type = TransactionType.Refund,
Blockchain = transferResult.Blockchain,
FirstSeen = null,
DueDate = refundDueDate,
TransferId = transferResult.Id,
IdentityType = transferResultTransaction.IdentityType,
Identity = transferResultTransaction.Identity
});
await _transactionPublisher.PublishAsync(refundTransaction);
}
if (transferResult.Transactions.All(x => x.HasError))
{
throw new RefundOperationFailedException {
TransferErrors = transferResult.Transactions.Select(x => x.Error)
}
}
;
IEnumerable <TransferTransactionResult> errorTransactions =
transferResult.Transactions.Where(x => x.HasError).ToList();
if (errorTransactions.Any())
{
throw new RefundOperationPartiallyFailedException(errorTransactions.Select(x => x.Error));
}
}
catch (Exception)
{
await _paymentRequestService.UpdateStatusAsync(paymentRequest.WalletAddress,
PaymentRequestStatusInfo.Error(PaymentRequestProcessingError.UnknownRefund));
throw;
}
return(await PrepareRefundResult(paymentRequest, transferResult, refundDueDate));
}
