/// <summary>
/// Format a token value according to its decimals and symbol
/// eg "5000000000000000" becomes "50,000 SYM"
/// </summary>
public static async Task <string> PrettifyAsync(this BigInteger value, StandardTokenService sts)
{
var symbol = await sts.SymbolQueryAsync();
var decimals = await sts.DecimalsQueryAsync();
var valueFactored = value / BigInteger.Pow(10, decimals);
return($"{valueFactored.ToString("N0")} {symbol}");
}
private async Task <string> WriteOHLC(TradeEvent ev, DateTimeOffset?timestamp)
{
try
{
string tokenSymbol;
decimal tokenAmount, ethAmount, price = 0;
TokenModel token;
if (ev.TokenGet == NullAddress)
{
token = await _context.Token.FirstOrDefaultAsync(x => x.Token == ev.TokenGive);
tokenSymbol = token.Symbol;
var d = await _cache.GetOrCreateAsync(ev.TokenGive, entry =>
{
entry.SlidingExpiration = TimeSpan.FromSeconds(5);
var tokenContract = new StandardTokenService(_nethereumClient, ev.TokenGive);
var decimals = tokenContract.DecimalsQueryAsync(new DecimalsFunction()).Result;
return(Task.FromResult((decimal)Math.Pow(10, decimals)));
});
tokenAmount = (decimal)BigInteger.DivRem(ev.AmountGive, new BigInteger(d), out var remainder);
if (remainder > 0)
{
tokenAmount += (decimal)remainder / d;
}
ethAmount = UnitConversion.Convert.FromWei(ev.AmountGet, UnitConversion.EthUnit.Ether);
if (tokenAmount > 0)
{
price = ethAmount / tokenAmount;
}
}
else
{
token = await _context.Token.FirstOrDefaultAsync(x => x.Token == ev.TokenGet);
tokenSymbol = token.Symbol;
var d = await _cache.GetOrCreateAsync(ev.TokenGet, entry =>
{
entry.SlidingExpiration = TimeSpan.FromSeconds(5);
var tokenContract = new StandardTokenService(_nethereumClient, ev.TokenGive);
var decimals = tokenContract.DecimalsQueryAsync(new DecimalsFunction()).Result;
return(Task.FromResult((decimal)Math.Pow(10, decimals)));
});
tokenAmount = (decimal)BigInteger.DivRem(ev.AmountGet, new BigInteger(d), out var remainder);
if (remainder > 0)
{
tokenAmount += (decimal)remainder / d;
}
ethAmount = UnitConversion.Convert.FromWei(ev.AmountGive, UnitConversion.EthUnit.Ether);
if (tokenAmount > 0)
{
price = ethAmount / tokenAmount;
}
}
_ohclService.WriteOHLC(price, tokenAmount, token.Symbol, timestamp.Value.UtcDateTime);
return(tokenSymbol);
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
