public async Task <APIResponse> AssetEth([FromBody] AssetEthModel model)
{
// validate
if (BaseValidableModel.IsInvalid(model, out var errFields))
{
return(APIResponse.BadRequest(errFields));
}
// try parse amount
if (!BigInteger.TryParse(model.Amount, out var inputAmount) || inputAmount < 1)
{
return(APIResponse.BadRequest(nameof(model.Amount), "Invalid amount"));
}
// try parse fiat currency
var exchangeCurrency = FiatCurrency.Usd;
if (Enum.TryParse(model.Currency, true, out FiatCurrency fc))
{
exchangeCurrency = fc;
}
// ---
var rcfg = RuntimeConfigHolder.Clone();
var user = await GetUserFromDb();
var userTier = CoreLogic.User.GetTier(user);
var agent = GetUserAgentInfo();
if (userTier < UserTier.Tier2)
{
return(APIResponse.BadRequest(APIErrorCode.AccountNotVerified));
}
// ---
if (!rcfg.Gold.AllowTradingEth)
{
return(APIResponse.BadRequest(APIErrorCode.TradingNotAllowed));
}
var limits = WithdrawalLimits(rcfg, TradableCurrency.Eth);
var estimation = await Estimation(rcfg, inputAmount, TradableCurrency.Eth, exchangeCurrency, model.EthAddress, model.Reversed, limits.Min, limits.Max);
if (!estimation.TradingAllowed || estimation.ResultCurrencyAmount < 1)
{
return(APIResponse.BadRequest(APIErrorCode.TradingNotAllowed));
}
if (estimation.IsLimitExceeded)
{
return(APIResponse.BadRequest(APIErrorCode.TradingExchangeLimit, estimation.View.Limits));
}
// limit gold amount to max available
if (estimation.ResultGoldAmount.FromSumus() > user.UserSumusWallet.BalanceGold)
{
estimation = await Estimation(rcfg, user.UserSumusWallet.BalanceGold.ToSumus(), TradableCurrency.Eth, exchangeCurrency, model.EthAddress, false, limits.Min, limits.Max);
if (!estimation.TradingAllowed || estimation.ResultCurrencyAmount < 1)
{
return(APIResponse.BadRequest(APIErrorCode.TradingNotAllowed));
}
if (estimation.IsLimitExceeded)
{
return(APIResponse.BadRequest(APIErrorCode.TradingExchangeLimit, estimation.View.Limits));
}
}
var timeNow = DateTime.UtcNow;
// history
var finHistory = new DAL.Models.UserFinHistory()
{
Status = UserFinHistoryStatus.Unconfirmed,
Type = UserFinHistoryType.GoldSell,
Source = "GOLD",
SourceAmount = TextFormatter.FormatTokenAmountFixed(estimation.ResultGoldAmount, TokensPrecision.Sumus),
Destination = "ETH",
DestinationAmount = TextFormatter.FormatTokenAmountFixed(estimation.ResultCurrencyAmount, TokensPrecision.Ethereum),
Comment = "",
TimeCreated = timeNow,
UserId = user.Id,
};
DbContext.UserFinHistory.Add(finHistory);
await DbContext.SaveChangesAsync();
// request
var request = new DAL.Models.SellGoldEth()
{
Status = BuySellGoldRequestStatus.Unconfirmed,
GoldAmount = estimation.ResultGoldAmount.FromSumus(),
Destination = model.EthAddress,
EthAmount = estimation.ResultCurrencyAmount.FromSumus(),
ExchangeCurrency = exchangeCurrency,
GoldRateCents = estimation.CentsPerGoldRate,
EthRateCents = estimation.CentsPerAssetRate,
TimeCreated = timeNow,
RelFinHistoryId = finHistory.Id,
UserId = user.Id,
};
// add and save
DbContext.SellGoldEth.Add(request);
await DbContext.SaveChangesAsync();
var assetPerGold = CoreLogic.Finance.Estimation.AssetPerGold(TradableCurrency.Eth, estimation.CentsPerAssetRate, estimation.CentsPerGoldRate);
return(APIResponse.Success(
new AssetEthView()
{
RequestId = request.Id,
EthRate = estimation.CentsPerAssetRate / 100d,
GoldRate = estimation.CentsPerGoldRate / 100d,
Currency = exchangeCurrency.ToString().ToUpper(),
EthPerGoldRate = assetPerGold.ToString(),
Estimation = estimation.View,
}
));
}
public async Task <APIResponse> AssetEth([FromBody] AssetEthModel model)
{
// validate
if (BaseValidableModel.IsInvalid(model, out var errFields))
{
return(APIResponse.BadRequest(errFields));
}
// try parse amount
if (!BigInteger.TryParse(model.Amount, out var inputAmount) || inputAmount < 1)
{
return(APIResponse.BadRequest(nameof(model.Amount), "Invalid amount"));
}
// try parse fiat currency
var exchangeCurrency = FiatCurrency.Usd;
if (Enum.TryParse(model.Currency, true, out FiatCurrency fc))
{
exchangeCurrency = fc;
}
// ---
var rcfg = RuntimeConfigHolder.Clone();
var user = await GetUserFromDb();
// ---
if (!rcfg.Gold.AllowTradingEth)
{
return(APIResponse.BadRequest(APIErrorCode.TradingNotAllowed));
}
var limits = DepositLimits(rcfg, TradableCurrency.Eth);
// estimation
var estimation = await Estimation(rcfg, inputAmount, TradableCurrency.Eth, exchangeCurrency, model.Reversed, 0d, limits.Min, limits.Max);
if (!estimation.TradingAllowed || estimation.ResultCurrencyAmount < 1)
{
return(APIResponse.BadRequest(APIErrorCode.TradingNotAllowed));
}
if (estimation.IsLimitExceeded)
{
return(APIResponse.BadRequest(APIErrorCode.TradingExchangeLimit, estimation.View.Limits));
}
var timeNow = DateTime.UtcNow;
// request
var request = new DAL.Models.BuyGoldEth()
{
Status = BuySellGoldRequestStatus.Unconfirmed,
ExchangeCurrency = exchangeCurrency,
GoldRateCents = estimation.CentsPerGoldRate,
EthRateCents = estimation.CentsPerAssetRate,
TimeCreated = timeNow,
UserId = user.Id,
};
DbContext.BuyGoldEth.Add(request);
await DbContext.SaveChangesAsync();
// get a token from eth2gold service
var contractToken = "";
{
try {
var reply = await Bus.Request(
Eth2Gold.Subject.Request.OrderCreate,
new Eth2Gold.Request.OrderCreate()
{
ExternalID = (ulong)request.Id,
},
Eth2Gold.Request.OrderCreateReply.Parser
);
if (reply.ResultCase == Eth2Gold.Request.OrderCreateReply.ResultOneofCase.Token)
{
if (reply.Token.ToByteArray().Length != 32)
{
throw new Exception($"token is length of {reply.Token.ToByteArray().Length}");
}
contractToken = BitConverter.ToString(reply.Token.ToByteArray()).Replace("-", string.Empty);
}
else
{
throw new Exception(reply.Error);
}
} catch (Exception e) {
Logger.Error(e, "Failed to get token from eth2gold service");
return(APIResponse.Failure(APIErrorCode.InternalServerError));
}
}
var assetPerGold = CoreLogic.Finance.Estimation.AssetPerGold(TradableCurrency.Eth, estimation.CentsPerAssetRate, estimation.CentsPerGoldRate);
return(APIResponse.Success(
new AssetEthView()
{
RequestId = request.Id,
EthRate = estimation.CentsPerAssetRate / 100d,
GoldRate = estimation.CentsPerGoldRate / 100d,
EthPerGoldRate = assetPerGold.ToString(),
Currency = exchangeCurrency.ToString().ToUpper(),
Expires = ((DateTimeOffset)timeNow.AddHours(1)).ToUnixTimeSeconds(),
Estimation = estimation.View,
ContractToken = contractToken,
}
));
}