Publish Nerbus source snapshot and build documentation

lib/markets/nestex.js

@@ -0,0 +1,139 @@
+const request = require('postman-request');
+const base_url = 'https://trade.nestex.one/api/';
+const market_url_template = 'https://trade.nestex.one/spot/{coin}';
+
+// 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 + 'cg/tickers/' + 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.error != null)
+        return cb(body.error, null);
+      else {
+        try {
+          const summary = {
+            'high': parseFloat(body.high) || 0,
+            'low': parseFloat(body.low) || 0,
+            'volume': parseFloat(body.base_volume) || 0,
+            'volume_btc': parseFloat(body.target_volume) || 0,
+            'bid': parseFloat(body.bid) || 0,
+            'ask': parseFloat(body.ask) || 0,
+            'last': parseFloat(body.last_price) || 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 + 'cg/tradebook/' + 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.error != null)
+        return cb(body.error, null);
+      else {
+        try {
+          let trades = [];
+
+          for (let t = 0; t < body.data.length; t++) {
+            trades.push({
+              ordertype: body.data[t].side.toString().toUpperCase(),
+              price: parseFloat(body.data[t].price) || 0,
+              quantity: parseFloat(body.data[t].quantity) || 0,
+              timestamp: parseInt(body.data[t].timestamp) / 1000
+            });
+          }
+
+          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 + 'cg/orderbook/' + coin + '_' + exchange + '?depth=100';
+
+  // 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.error != null)
+      return cb(body.error, null, null);
+    else {
+      try {
+        let buys = [];
+        let sells = [];
+        const bids = Object.entries(body.bids);
+        const asks = Object.entries(body.asks);
+
+        for (let b = 0; b < bids.length; b++) {
+          buys.push({
+            price: parseFloat(bids[b][0]) || 0,
+            quantity: parseFloat(bids[b][1]) || 0
+          });
+        }
+
+        for (let a = 0; a < asks.length; a++) {
+          sells.push({
+            price: parseFloat(asks[a][0]) || 0,
+            quantity: parseFloat(asks[a][1]) || 0
+          });
+        }
+
+        return cb(null, buys, sells);
+      } catch(err) {
+        return cb(api_error_msg, null, null);
+      }
+    }
+  });
+}
+
+module.exports = {
+  market_name: 'NestEx',
+  market_logo: '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',
+  market_url_template: market_url_template,
+  market_url_case: 'u',
+  get_data: function(settings, cb) {
+    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);
+    });
+  }
+};