public async Task HandlerAsync(FastSell command)
{
await _transactionService.FastSellTransactionAsync(command.FromCurrency, command.Amount, command.UserId);
var price = await CryptoCompare.GetCryptoPriceInUsd(command.FromCurrency);
await _historyService.AddAsync(OperationType.Sell, command.FromCurrency, command.Amount, price, command.UserId);
}
public async Task FastSellTransactionAsync(string fromCurrnecy, decimal amount, Guid userId)
{
var wallet = await _walletRepository.GetByUserIdAsync(userId);
var price = await CryptoCompare.GetCryptoPriceInUsd(fromCurrnecy);
var fromWallet = wallet.Where(x => x.Currency == fromCurrnecy && (x.AmountOfMoney - amount) >= 0).SingleOrDefault();
var toWallet = wallet.Where(x => x.Currency == "USD").SingleOrDefault();
if (fromWallet == null || toWallet == null)
{
throw new Exception("Wallet is not exists");
}
fromWallet.SetAmountOfMoney(fromWallet.AmountOfMoney - amount);
toWallet.SetAmountOfMoney(toWallet.AmountOfMoney + amount * price);
await _walletRepository.UpdateAsync(fromWallet);
await _walletRepository.UpdateAsync(toWallet);
}