Publish Nerbus source snapshot and build documentation

lib/markets/yobit.js

@@ -0,0 +1,143 @@
+const request = require('postman-request');
+const base_url = 'https://yobit.net/api/3';
+const market_url_template = 'https://yobit.net/en/trade/{coin}/{base}';
+
+// initialize the rate limiter to wait 2 seconds between requests to prevent abusing external apis
+const rateLimitLib = require('../ratelimit');
+const rateLimit = new rateLimitLib.RateLimit(1, 2000, false);
+
+function get_summary(coin, exchange, api_error_msg, cb) {
+  const req_url = base_url + '/ticker/' + coin + '_' + exchange;
+
+  // pause for 2 seconds before continuing
+  rateLimit.schedule(function() {
+    request({uri: req_url, json: true}, function (error, response, body) {
+      if (error)
+        return cb(error, null);
+      else if (body == null || body == '' || typeof body !== 'object')
+        return cb(api_error_msg, null);
+      else if (body.success == 0)
+        return cb((body.error != null ? body.error : api_error_msg), null);
+      else {
+        try {
+          const prefix = body[coin + '_' + exchange];
+          const summary = {
+            'high': parseFloat(prefix.high) || 0,
+            'low': parseFloat(prefix.low) || 0,
+            'volume': parseFloat(prefix.vol) || 0,
+            'bid': parseFloat(prefix.buy) || 0,
+            'ask': parseFloat(prefix.sell) || 0,
+            'last': parseFloat(prefix.last) || 0
+          };
+
+          return cb(null, summary);
+        } catch(err) {
+          return cb(api_error_msg, null);
+        }
+      }
+    });
+  });
+}
+
+function get_trades(coin, exchange, api_error_msg, cb) {
+  const req_url = base_url + '/trades/' + coin + '_' + exchange;
+
+  // pause for 2 seconds before continuing
+  rateLimit.schedule(function() {
+    request({uri: req_url, json: true}, function (error, response, body) {
+      if (error)
+        return cb(error, null);
+      else if (body == null || body == '' || typeof body !== 'object')
+        return cb(api_error_msg, null);
+      else if (body.success == 0)
+        return cb((body.error != null ? body.error : api_error_msg), null);
+      else {
+        try {
+          const prefix = body[coin + '_' + exchange];
+          let trades = [];
+
+          for (let t = 0; t < prefix.length; t++) {
+            trades.push({
+              ordertype: (prefix[t].type.toLowerCase() == 'bid' ? 'BUY' : 'SELL'),
+              price: parseFloat(prefix[t].price) || 0,
+              quantity: parseFloat(prefix[t].amount) || 0,
+              timestamp: parseInt(prefix[t].timestamp)
+            });
+          }
+
+          return cb(null, trades);
+        } catch(err) {
+          return cb(api_error_msg, null);
+        }
+      }
+    });
+  });
+}
+
+function get_orders(coin, exchange, api_error_msg, cb) {
+  const req_url = base_url + '/depth/' + coin + '_' + exchange;
+
+  // NOTE: no need to pause here because this is the first api call
+  request({uri: req_url, json: true}, function (error, response, body) {
+    if (error)
+      return cb(error, null, null);
+    else if (body == null || body == '' || typeof body !== 'object')
+      return cb(api_error_msg, null, null);
+    else if (body.success == 0)
+      return cb((body.error != null ? body.error : api_error_msg), null, null);
+    else {
+      try {
+        const prefix = body[coin + '_' + exchange];
+        let buys = [];
+        let sells = [];
+
+        for (let b = 0; b < prefix.bids.length; b++) {
+          buys.push({
+            price: parseFloat(prefix.bids[b][0]) || 0,
+            quantity: parseFloat(prefix.bids[b][1]) || 0
+          });
+        }
+
+        for (let s = 0; s < prefix.asks.length; s++) {
+          sells.push({
+            price: parseFloat(prefix.asks[s][0]) || 0,
+            quantity: parseFloat(prefix.asks[s][1]) || 0
+          });
+        }
+
+        return cb(null, buys, sells);
+      } catch(err) {
+        return cb(api_error_msg, null, null);
+      }
+    }
+  });
+}
+
+module.exports = {
+  market_name: 'Yobit',
+  market_logo: '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',
+  market_url_template: market_url_template,
+  market_url_case: 'u',
+  get_data: function(settings, cb) {
+    // ensure coin info is lowercase
+    settings.coin = settings.coin.toLowerCase();
+    settings.exchange = settings.exchange.toLowerCase();
+
+    get_orders(settings.coin, settings.exchange, settings.api_error_msg, function(order_error, buys, sells) {
+      if (order_error == null) {
+        get_trades(settings.coin, settings.exchange, settings.api_error_msg, function(trade_error, trades) {
+          if (trade_error == null) {
+            get_summary(settings.coin, settings.exchange, settings.api_error_msg, function(summary_error, stats) {
+              if (summary_error == null)
+                return cb(null, {buys: buys, sells: sells, trades: trades, stats: stats, chartdata: null});
+              else
+                return cb(summary_error, null);
+            });
+          } else
+            return cb(trade_error, null);
+        });
+      } else
+        return cb(order_error, null);
+    });
+  }
+};