public async Task <IEnumerable <ICurrencyBalance> > GetBalances()
{
var timestamp = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds().ToString();
string totalParams = string.Format("timestamp={0}", timestamp);
string sign = CalculateSignature(totalParams, _config.Secret);
var data = new Dictionary <string, object> {
{ "timestamp", timestamp },
{ "signature", sign }
};
var account = await _binance.GetAccount(_config.ApiKey, data);
return(account.balances.Select(b => new Balance(b)));
}