public async Task <IActionResult> Transfer(
Guid userId,
[FromBody][Required] WalletTransferDto wallet)
{
await _walletService.Transfer(userId, wallet);
return(NoContent());
}
public async Task Transfer(Guid userId, WalletTransferDto walletDto)
{
await CheckUserExists(userId);
Wallet walletFrom = await CreateWalletIfNotExist(userId, walletDto.CurrencyFrom);
if (!TrySubstractAmount(walletFrom.Total, walletDto.Amount, out decimal newTotalFrom, out string error))
{
throw new InvalidRequestException(error);
}
walletFrom.Total = newTotalFrom;
var converter = new CurrencyConverter(_logger, _currencyRatesProvider);
if (!converter.TryConvert(
walletDto.CurrencyFrom,
walletDto.CurrencyTo,
walletDto.Amount,
out decimal amountTo,
out error))
{
throw new InvalidRequestException(error);
}
Wallet walletTo = await CreateWalletIfNotExist(userId, walletDto.CurrencyTo);
if (!TryAddAmount(walletTo.Total, amountTo, out decimal newTotalTo, out error))
{
throw new InvalidRequestException(error);
}
walletTo.Total = newTotalTo;
await _db.SaveChangesAsync();
}
