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Francois Klieber committed
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var Bitstamp = require("bitstamp");
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var _ = require('lodash');
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var moment = require('moment');
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var log = require('../core/log');
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var util = require('../core/util');
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var Trader = function(config) {
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_.bindAll(this);
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if(_.isObject(config)) {
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this.key = config.key;
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this.secret = config.secret;
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this.clientID = config.username;
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this.asset = config.asset.toLowerCase();
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this.currency = config.currency.toLowerCase();
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this.market = this.asset + this.currency;
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}
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this.name = 'Bitstamp';
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this.bitstamp = new Bitstamp(this.key, this.secret, this.clientID);
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}
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// if the exchange errors we try the same call again after
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// waiting 10 seconds
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Trader.prototype.retry = function(method, args) {
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var wait = +moment.duration(10, 'seconds');
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log.debug(this.name, 'returned an error, retrying..');
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var self = this;
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// make sure the callback (and any other fn)
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// is bound to Trader
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_.each(args, function(arg, i) {
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if(_.isFunction(arg))
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args[i] = _.bind(arg, self);
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});
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// run the failed method again with the same
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// arguments after wait
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setTimeout(
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function() { method.apply(self, args) },
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wait
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);
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}
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Trader.prototype.getPortfolio = function(callback) {
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var args = _.toArray(arguments);
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var set = function(err, data) {
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if(data && data.error) {
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err = data.error;
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}
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if(err) {
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if(err.meta && err.meta.reason === 'API key not found')
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util.die('Bitstamp says this API keys is invalid..');
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log.error('BITSTAMP API ERROR:', err);
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return this.retry(this.getPortfolio, args);
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}
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var portfolio = [];
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_.each(data, function(amount, asset) {
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if(asset.indexOf('available') !== -1) {
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asset = asset.substr(0, 3).toUpperCase();
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portfolio.push({name: asset, amount: parseFloat(amount)});
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}
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});
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callback(err, portfolio);
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}.bind(this);
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this.bitstamp.balance(this.market, set);
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}
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Trader.prototype.getTicker = function(callback) {
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this.bitstamp.ticker(this.market, callback);
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}
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Trader.prototype.getFee = function(callback) {
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var set = function(err, data) {
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if(err)
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callback(err);
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callback(false, data.fee / 100);
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}.bind(this);
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this.bitstamp.balance(this.market, set);
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}
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Trader.prototype.buy = function(amount, price, callback) {
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var findMarket = function(pair) {
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return pair.pair[0].toLowerCase() === this.currency && pair.pair[1].toLowerCase() === this.asset
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}
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var args = _.toArray(arguments);
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var set = function(err, result) {
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if(err || result.status === "error") {
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log.error('unable to buy:', err, result.reason, 'retrying...');
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return this.retry(this.buy, args);
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}
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callback(null, result.id);
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}.bind(this);
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//Decrease amount by 1% to avoid trying to buy more than balance allows.
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amount = Number(amount * 0.99).toFixed(8);
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// Use proper precision by currency pair
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var pair = _.find(Trader.getCapabilities().markets, _.bind(findMarket, this));
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price = Number(Number.parseFloat(price).toFixed(pair.precision));
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this.bitstamp.buy(this.market, amount, price, undefined, set);
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}
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Trader.prototype.sell = function(amount, price, callback) {
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var findMarket = function(pair) {
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return pair.pair[0].toLowerCase() === this.currency && pair.pair[1].toLowerCase() === this.asset
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}
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var args = _.toArray(arguments);
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var set = function(err, result) {
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if(err || result.status === "error") {
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log.error('unable to sell:', err, result.reason, 'retrying...');
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return this.retry(this.sell, args);
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}
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callback(null, result.id);
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}.bind(this);
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// prevent:
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// 'Ensure that there are no more than 8 decimal places.'
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amount = Number(Number.parseFloat(amount)).toFixed(8);
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// Use proper precision by currency pair
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var pair = _.find(Trader.getCapabilities().markets, _.bind(findMarket, this));
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price = Number(Number.parseFloat(price).toFixed(pair.precision));
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this.bitstamp.sell(this.market, amount, price, undefined, set);
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}
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Trader.prototype.getOrder = function(id, callback) {
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var args = _.toArray(arguments);
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var get = function(err, data) {
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if(!err && _.isEmpty(data) && _.isEmpty(data.result))
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err = 'no data';
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else if(!err && !_.isEmpty(data.error))
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err = data.error;
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if(err) {
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log.error('Unable to get order', order, JSON.stringify(err));
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return this.retry(this.getOrder, args);
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}
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var order = _.find(data, o => o.order_id === +id);
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if(!order) {
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// if the order was cancelled we are unable
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// to retrieve it, assume that this is what
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// is happening.
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return callback(err, {
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price: 0,
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amount: 0,
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date: moment(0)
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});
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}
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var price = parseFloat( order[`${this.asset}_${this.currency}`] );
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var amount = Math.abs(parseFloat( order[this.asset] ));
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var date = moment( order.datetime );
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callback(err, {price, amount, date});
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}.bind(this);
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this.bitstamp.user_transactions(this.market, {}, get);
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}
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Trader.prototype.checkOrder = function(order, callback) {
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var check = function(err, result) {
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var stillThere = _.find(result, function(o) { return o.id === order });
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callback(err, !stillThere);
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}.bind(this);
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this.bitstamp.open_orders(this.market, check);
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}
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Trader.prototype.cancelOrder = function(order, callback) {
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var args = _.toArray(arguments);
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var cancel = function(err, result) {
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if(err || !result) {
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log.error('unable to cancel order', order, '(', err, result, ')');
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return this.retry(this.cancelOrder, args);
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}
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callback();
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}.bind(this);
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this.bitstamp.cancel_order(order, cancel);
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}
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Trader.prototype.getTrades = function(since, callback, descending) {
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var args = _.toArray(arguments);
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var process = function(err, trades) {
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if(err)
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return this.retry(this.getTrades, args);
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var result = _.map(trades, t => {
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return {
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date: t.date,
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tid: +t.tid,
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price: +t.price,
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amount: +t.amount
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}
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})
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callback(null, result.reverse());
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}.bind(this);
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// NOTE: temporary disabled, see https://github.com/askmike/gekko/issues/794
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// if(since)
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// this.bitstamp.transactions(this.market, {time: 'day'}, process);
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// else
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this.bitstamp.transactions(this.market, process);
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}
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Trader.getCapabilities = function () {
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return {
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name: 'Bitstamp',
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slug: 'bitstamp',
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currencies: ['USD', 'EUR', 'BTC'],
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assets: ['BTC', 'BCH', 'EUR', 'LTC', 'ETH', 'XRP'],
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maxTradesAge: 60,
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maxHistoryFetch: null,
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markets: [
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{ pair: ['USD', 'EUR'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['USD', 'BTC'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['EUR', 'BTC'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['USD', 'BCH'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['EUR', 'BCH'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['BTC', 'BCH'], minimalOrder: { amount: 0.001, unit: 'currency'}, precision: 8 },
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{ pair: ['USD', 'XRP'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 5 },
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{ pair: ['EUR', 'XRP'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 5 },
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{ pair: ['BTC', 'XRP'], minimalOrder: { amount: 0.001, unit: 'currency'}, precision: 8 },
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{ pair: ['USD', 'LTC'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['EUR', 'LTC'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['BTC', 'LTC'], minimalOrder: { amount: 0.001, unit: 'currency'}, precision: 8 },
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{ pair: ['USD', 'ETH'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['EUR', 'ETH'], minimalOrder: { amount: 5, unit: 'currency' }, precision: 2 },
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{ pair: ['BTC', 'ETH'], minimalOrder: { amount: 0.001, unit: 'currency'}, precision: 8 },
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],
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requires: ['key', 'secret', 'username'],
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fetchTimespan: 60,
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tid: 'tid',
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tradable: true
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};
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}
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module.exports = Trader;
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