1. Jordan Lee
  2. NuBotTrading
  3. Source

BitfinexPriceFeed.java

Source Diff History

NuBotTrading / src / main / java / com / nubits / nubot / pricefeeds / feedservices / BitfinexPriceFeed.java

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/*
 * Copyright (C) 2015 Nu Development Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package com.nubits.nubot.pricefeeds.feedservices;


import com.nubits.nubot.global.Settings;
import com.nubits.nubot.models.Amount;
import com.nubits.nubot.models.CurrencyList;
import com.nubits.nubot.models.CurrencyPair;
import com.nubits.nubot.models.LastPrice;
import com.nubits.nubot.pricefeeds.FeedCallException;
import com.nubits.nubot.pricefeeds.FeedFacade;
import com.nubits.nubot.utils.Utils;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

public class BitfinexPriceFeed extends AbstractPriceFeed {

    private static final Logger LOG = LoggerFactory.getLogger(BitfinexPriceFeed.class.getName());

    public BitfinexPriceFeed() {
        name = FeedFacade.BitfinexPriceFeed;
        refreshMinTime = Settings.FEEDFETCH_DEFAULT_INTERVAL;
    }

    @Override
    public LastPrice forceFetchLastPrice(CurrencyPair pair) throws FeedCallException {

        String url = getUrl(pair);
        String htmlString;
        try {
            htmlString = Utils.getHTML(url, true);
        } catch (IOException ex) {
            LOG.error(ex.toString());
            throw new FeedCallException((this.getClass().getSimpleName() + " : Unable to fetch last price."));
        }
        JSONParser parser = new JSONParser();
        try {
            JSONObject httpAnswerJson = (JSONObject) (parser.parse(htmlString));
            double last = Double.valueOf((String) httpAnswerJson.get("last_price"));

            //Make the average between buy and sell
            last = Utils.round(last);

            LastPrice tmp = new LastPrice(false, name, pair.getOrderCurrency(), new Amount(last, CurrencyList.USD));
            return tmp;
        } catch (Exception ex) {
            LOG.error(ex.toString());
            throw new FeedCallException((this.getClass().getSimpleName() + " : Unable to fetch last price. (parseError)"));
        }
    }

    private String getUrl(CurrencyPair pair) {
        String pairStr = pair.getOrderCurrency().getCode().toLowerCase() + "usd";
        return "https://api.bitfinex.com/v1/pubticker/" + pairStr;
    }

}