private async Task <EstimationResult> Estimation(RuntimeConfig rcfg, BigInteger inputAmount, TradableCurrency?ethereumToken, FiatCurrency fiatCurrency, string ethAddress, bool reversed, BigInteger withdrawalLimitMin, BigInteger withdrawalLimitMax)
{
var allowed = false;
var centsPerAsset = 0L;
var centsPerGold = 0L;
var resultGoldAmount = BigInteger.Zero;
var resultCurrencyAmount = BigInteger.Zero;
var resultCurrencyAmountMinusFee = BigInteger.Zero;
object viewAmount = null;
var viewAmountCurrency = "";
object viewFee = null;
var viewFeeCurrency = "";
var limitsData = (EstimateLimitsView)null;
// default estimation: GOLD to specified currency
if (!reversed)
{
// fiat
if (ethereumToken == null)
{
var res = await CoreLogic.Finance.Estimation.SellGoldFiat(
services : HttpContext.RequestServices,
fiatCurrency : fiatCurrency,
goldAmount : inputAmount
);
allowed = res.Allowed;
centsPerGold = res.CentsPerGoldRate;
resultGoldAmount = res.ResultGoldAmount;
resultCurrencyAmount = res.ResultCentsAmount;
var mntBalance = ethAddress != null ? await EthereumObserver.GetAddressMntBalance(ethAddress) : BigInteger.Zero;
var fee = CoreLogic.Finance.Estimation.SellingFeeForFiat(res.ResultCentsAmount, mntBalance);
resultCurrencyAmountMinusFee = res.ResultCentsAmount - fee;
viewAmount = (long)resultCurrencyAmountMinusFee / 100d;
viewAmountCurrency = fiatCurrency.ToString().ToUpper();
viewFee = fee / 100d;
viewFeeCurrency = fiatCurrency.ToString().ToUpper();
limitsData = new EstimateLimitsView()
{
Currency = fiatCurrency.ToString().ToUpper(),
Min = (long)withdrawalLimitMin / 100d,
Max = (long)withdrawalLimitMax / 100d,
Cur = (long)resultCurrencyAmountMinusFee / 100d,
};
}
// cryptoasset
else
{
var res = await CoreLogic.Finance.Estimation.SellGoldCrypto(
services : HttpContext.RequestServices,
ethereumToken : ethereumToken.Value,
fiatCurrency : fiatCurrency,
goldAmount : inputAmount
);
allowed = res.Allowed;
centsPerGold = res.CentsPerGoldRate;
centsPerAsset = res.CentsPerAssetRate;
resultGoldAmount = res.ResultGoldAmount;
resultCurrencyAmount = res.ResultAssetAmount;
var fee = CoreLogic.Finance.Estimation.SellingFeeForCrypto(ethereumToken.Value, res.ResultAssetAmount);
resultCurrencyAmountMinusFee = res.ResultAssetAmount - fee;
viewAmount = resultCurrencyAmountMinusFee.ToString();
viewAmountCurrency = ethereumToken.Value.ToString().ToUpper();
viewFee = fee.ToString();
viewFeeCurrency = ethereumToken.Value.ToString().ToUpper();
limitsData = new EstimateLimitsView()
{
Currency = fiatCurrency.ToString().ToUpper(),
Min = withdrawalLimitMin.ToString(),
Max = withdrawalLimitMax.ToString(),
Cur = resultCurrencyAmountMinusFee.ToString(),
};
}
}
// reversed estimation: specified currency to GOLD
else
{
// fiat
if (ethereumToken == null)
{
var mntBalance = ethAddress != null ? await EthereumObserver.GetAddressMntBalance(ethAddress) : BigInteger.Zero;
var fee = CoreLogic.Finance.Estimation.SellingFeeForFiat((long)inputAmount, mntBalance);
var res = await CoreLogic.Finance.Estimation.SellGoldFiatRev(
services : HttpContext.RequestServices,
fiatCurrency : fiatCurrency,
requiredFiatAmountWithFeeCents : (long)inputAmount + fee
);
allowed = res.Allowed;
centsPerGold = res.CentsPerGoldRate;
resultGoldAmount = res.ResultGoldAmount;
resultCurrencyAmount = res.ResultCentsAmount;
resultCurrencyAmountMinusFee = inputAmount;
viewAmount = res.ResultGoldAmount.ToString();
viewAmountCurrency = "GOLD";
viewFee = fee.ToString();
viewFeeCurrency = fiatCurrency.ToString().ToUpper();
limitsData = new EstimateLimitsView()
{
Currency = fiatCurrency.ToString().ToUpper(),
Min = (long)withdrawalLimitMin / 100d,
Max = (long)withdrawalLimitMax / 100d,
Cur = (long)resultCurrencyAmountMinusFee / 100d,
};
}
// cryptoasset
else
{
var fee = CoreLogic.Finance.Estimation.SellingFeeForCrypto(ethereumToken.Value, inputAmount);
var res = await CoreLogic.Finance.Estimation.SellGoldCryptoRev(
services : HttpContext.RequestServices,
ethereumToken : ethereumToken.Value,
fiatCurrency : fiatCurrency,
requiredCryptoAmountWithFee : inputAmount + fee
);
allowed = res.Allowed;
centsPerGold = res.CentsPerGoldRate;
centsPerAsset = res.CentsPerAssetRate;
resultGoldAmount = res.ResultGoldAmount;
resultCurrencyAmount = res.ResultAssetAmount;
resultCurrencyAmountMinusFee = inputAmount;
viewAmount = res.ResultGoldAmount.ToString();
viewAmountCurrency = "GOLD";
viewFee = fee.ToString();
viewFeeCurrency = ethereumToken.Value.ToString().ToUpper();
limitsData = new EstimateLimitsView()
{
Currency = fiatCurrency.ToString().ToUpper(),
Min = withdrawalLimitMin.ToString(),
Max = withdrawalLimitMax.ToString(),
Cur = resultCurrencyAmountMinusFee.ToString(),
};
}
}
var limitExceeded = resultCurrencyAmountMinusFee <withdrawalLimitMin || resultCurrencyAmountMinusFee> withdrawalLimitMax;
return(new EstimationResult()
{
TradingAllowed = allowed,
IsLimitExceeded = limitExceeded,
View = new EstimateView()
{
Amount = viewAmount,
AmountCurrency = viewAmountCurrency,
Fee = viewFee,
FeeCurrency = viewFeeCurrency,
Limits = limitsData,
},
CentsPerAssetRate = centsPerAsset,
CentsPerGoldRate = centsPerGold,
ResultGoldAmount = resultGoldAmount,
ResultCurrencyAmount = resultCurrencyAmount,
});
}
