public async Task <PaymentRequestRefund> GetRefundInfoAsync(string walletAddress)
{
IReadOnlyList <IPaymentRequestTransaction> transactions =
(await _transactionsService.GetByWalletAsync(walletAddress)).Where(x => x.IsRefund()).ToList();
if (!transactions.Any())
{
return(null);
}
IEnumerable <string> transferIds = transactions.Unique(x => x.TransferId).ToList();
if (transferIds.MoreThanOne())
{
throw new MultiTransactionRefundNotSupportedException();
}
Transfer transfer = await _transferService.GetAsync(transferIds.Single());
IPaymentRequest paymentRequest = await FindAsync(walletAddress);
return(new PaymentRequestRefund
{
Amount = transfer.Amounts.Sum(x => x.Amount ?? 0),
Timestamp = transfer.CreatedOn,
Address = transfer.Amounts.Unique(x => x.Destination).Single(),
DueDate = transactions.OrderByDescending(x => x.DueDate).First().DueDate ?? paymentRequest.DueDate,
Transactions = Mapper.Map <IEnumerable <PaymentRequestRefundTransaction> >(transactions)
});
}
