public async Task <bool> BuyShareAsync(Guid requestId, BuyShareViewModel viewModel)
{
var request = await GetRequestByIdAsync(requestId);
if (request == null)
{
throw new ArgumentException("request doesn't exist");
}
if (request.Status == "closed")
{
throw new ArgumentException("request is closed");
}
//TODO: Handle rollbacks
try
{
// Get share from source
var value = (await _sharesService.GetShareValue(request.ShareId)).SingleShareValue * request.Amount;
// Check if user has enough funds
var balance = (await _accountService.GetBalance(viewModel.AccountId)).Balance;
if (balance < value)
{
throw new ArgumentException("User doesn't have enough funds");
}
// Process transaction
if (!await _paymentsService.CreateTransaction(request.OwnerAccountId, viewModel.AccountId, value))
{
throw new ArgumentException("Couldn't create transaction");
}
// Calculate taxes
var taxes = value * 0.01m; // TAX RATE = 1%
// Process taxes
if (!await _accountService.PostTaxes(viewModel.AccountId, taxes))
{
throw new ArgumentException("Couldn't post taxes");
}
// Move shares
if (!await _shareControlService.ChangeOwnershipOfShare(request.ShareId, request.PortfolioId,
viewModel.PortfolioId, request.Amount))
{
throw new ArgumentException("Couldn't post taxes");
}
}
catch (Exception e)
{
throw new ArgumentException("Something went wrong, try again");
}
request.Status = "closed";
request.DateClosed = DateTime.UtcNow;
// Success, update database
_unitOfWork.RequestsRepository.Update(request);
await _unitOfWork.CommitAsync();
return(true);
}