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));
}
public async Task <PaymentResult> PayAsync(PaymentCommand cmd)
{
IPaymentRequest paymentRequest = await _paymentRequestRepository.GetAsync(cmd.MerchantId, cmd.PaymentRequestId);
if (paymentRequest == null)
{
throw new PaymentRequestNotFoundException(cmd.MerchantId, cmd.PaymentRequestId);
}
string payerWalletAddress = (await _merchantWalletService.GetDefaultAsync(
cmd.PayerMerchantId,
paymentRequest.PaymentAssetId,
PaymentDirection.Outgoing)).WalletAddress;
string destinationWalletAddress = await _walletsManager.ResolveBlockchainAddressAsync(
paymentRequest.WalletAddress,
paymentRequest.PaymentAssetId);
bool locked = await _paymentLocksService.TryAcquireLockAsync(
paymentRequest.Id,
cmd.MerchantId,
paymentRequest.DueDate);
if (!locked)
{
throw new DistributedLockAcquireException(paymentRequest.Id);
}
TransferResult transferResult;
try
{
await UpdateStatusAsync(paymentRequest.WalletAddress, PaymentRequestStatusInfo.InProcess());
transferResult = await _paymentRetryPolicy
.ExecuteAsync(() => _transferService.PayThrowFail(
paymentRequest.PaymentAssetId,
payerWalletAddress,
destinationWalletAddress,
cmd.Amount));
foreach (var transferResultTransaction in transferResult.Transactions)
{
IPaymentRequestTransaction paymentTx = await _transactionsService.CreateTransactionAsync(
new CreateTransactionCommand
{
Amount = transferResultTransaction.Amount,
Blockchain = transferResult.Blockchain,
AssetId = transferResultTransaction.AssetId,
WalletAddress = paymentRequest.WalletAddress,
DueDate = paymentRequest.DueDate,
IdentityType = transferResultTransaction.IdentityType,
Identity = transferResultTransaction.Identity,
Confirmations = 0,
Hash = transferResultTransaction.Hash,
TransferId = transferResult.Id,
Type = TransactionType.Payment,
SourceWalletAddresses = transferResultTransaction.Sources.ToArray()
});
await _transactionPublisher.PublishAsync(paymentTx);
}
}
catch (Exception e)
{
PaymentRequestStatusInfo newStatus = e is InsufficientFundsException
? PaymentRequestStatusInfo.New()
: PaymentRequestStatusInfo.Error(PaymentRequestProcessingError.UnknownPayment);
await UpdateStatusAsync(paymentRequest.WalletAddress, newStatus);
await _paymentLocksService.ReleaseLockAsync(paymentRequest.Id, cmd.MerchantId);
throw;
}
return(new PaymentResult
{
PaymentRequestId = paymentRequest.Id,
PaymentRequestWalletAddress = paymentRequest.WalletAddress,
AssetId = transferResult.Transactions.Unique(x => x.AssetId).Single(),
Amount = transferResult.GetSuccedeedTxs().Sum(x => x.Amount)
});
}