public async Task <SaveTransactionResponse> AddAsync(WalletTransaction walletTransaction)
{
if (walletTransaction is null)
{
throw new ArgumentNullException(nameof(walletTransaction));
}
var wallet = await _walletService.GetByGuidAsync(walletTransaction.WalletGuid);
if (wallet is null)
{
return(new SaveTransactionResponse(false, "Transaction for invalid Wallet"));
}
var transaction = await GetByGuidAsync(walletTransaction.Guid);
if (transaction != null)
{
return(new SaveTransactionResponse(true, "Transaction was already processed."));
}
int amountModifier;
try
{
amountModifier = TransactionType.GetAmountModifierByTransactionType(walletTransaction.TransactionType);
}
catch (ArgumentException ex)
{
return(new SaveTransactionResponse(false, ex.Message));
}
wallet.Balance += walletTransaction.Amount * amountModifier;
if (wallet.Balance < 0)
{
return(new SaveTransactionResponse(false, "Not enough gold."));
}
using (var transactionScope = new TransactionScope())
{
await _transactionRepository.AddAsync(walletTransaction);
await _walletService.UpdateAsync(wallet);
transactionScope.Complete();
}
return(new SaveTransactionResponse(true));
}