feat: Added support for coinmarketcap service for collecting cryptocurrency currency rate

config.sample.hjson

@@ -27,6 +27,9 @@
             USDT,
             TON
         ]
+        api_keys: {
+            coinmarketcap: TOKEN_COINMARKETCAP
+        }
     }
     schedule: 30 8 * * *
 }

services/coinmarketcap.js

@@ -0,0 +1,47 @@
+const axios = require('axios');
+const config = require('../utils/load_config.js')();
+const { truncate_number } = require('../utils/truncate_number.js');
+
+module.exports = {
+    parseCurrencies: async () => {
+        const promises = config['currency']['crypto'].map(fromCurrency => {
+            return config['currency']['crypto'].map(convCurrency => {
+                if (fromCurrency === convCurrency) return Promise.resolve(null);
+
+                return axios.get(
+                    'https://pro-api.coinmarketcap.com/v1/cryptocurrency/quotes/latest',
+                    {
+                        params: {
+                            symbol: fromCurrency,
+                            convert: convCurrency,
+                        },
+                        headers: {
+                            'X-CMC_PRO_API_KEY': config['currency']['api_keys']['coinmarketcap'],
+                        }
+                    }
+                )
+                .then((res) => {
+                    const data = res.data.data[fromCurrency].quote[convCurrency];
+                    const truncatedPriceStr = truncate_number(data.price, 3);
+                    const rate = parseFloat(truncatedPriceStr);
+
+                    return {
+                        from_currency: fromCurrency,
+                        conv_currency: convCurrency,
+                        rate: rate,
+                        date: new Date(data['last_updated']).toISOString().substring(0, 10),
+                    };
+                })
+                .catch((err) => {
+                    console.error(err.respone.data);
+                    return null;
+                });
+            });
+        });
+
+        const flattenedPromises = promises.flat();
+        const results = await Promise.all(flattenedPromises);
+
+        return results.filter(result => result !== null);
+    }
+};