Initialize update

.gitignore

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+**/node_modules

ApiCoinMarketCap.js

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+const axios = require('axios');
+const { type } = require('os');
+const env = require('./env.json');
+
+class ApiCoinMarketCap {
+
+    constructor () {
+        this.baseUrl = env.base_url;
+        this.baseParams = env.base_params;
+    }
+
+    async getMarketPrices(start = 1, limit = 100, options = {}) {
+        let baseUrl = this.baseUrl;
+        let baseParams = this.baseParams;
+        baseParams.start = start;
+        baseParams.limit = limit;
+        baseParams = this.setBaseParams(baseParams, options);
+        let baseParamsImploded = Object.keys(baseParams).map( (key) => [key, baseParams[key]].join("=")).join("&");
+
+        let apiUrl = [
+            baseUrl,
+            baseParamsImploded
+        ].join("?");
+
+        const { data } = await axios.get(apiUrl);
+
+        return data.data;
+    }
+
+    setBaseParams(baseParams, options) {
+        baseParams.sortBy = typeof options['sortBy'] != 'undefined' ? options['sortBy'] : baseParams.sortBy;
+        baseParams.sortType = typeof options['sortType'] != 'undefined' ? options['sortType'] : baseParams.sortType;
+        baseParams.convert = typeof options['convert'] != 'undefined' && typeof options['convert'] === 'object' ? options['convert'] : baseParams.convert;
+        baseParams.cryptoType =typeof options['cryptoType'] != 'undefined' ? options['cryptoType'] : baseParams.cryptoType;
+        baseParams.tagType = typeof options['tagType'] != 'undefined' ? options['tagType'] : baseParams.tagType;
+        baseParams.audited = typeof options['audited'] != 'undefined' ? options['audited'] : baseParams.audited;
+        baseParams.aux = typeof options['aux'] != 'undefined' && typeof options['aux'] === 'object' ? options['aux'] : baseParams.aux;
+        baseParams.tagSlugs = typeof options['tagSlugs'] != 'undefined' ? options['tagSlugs'] : baseParams.tagSlugs;
+
+        return baseParams;
+    }
+}
+
+module.exports = new ApiCoinMarketCap;

env.json

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+{
+    "base_url":"https://api.coinmarketcap.com/data-api/v3/cryptocurrency/listing",
+    "base_params": {
+        "start": 1,
+        "limit": 100,
+        "sortBy": "market_cap",
+        "sortType": "desc",
+        "convert": ["USD","BTC","ETH"],
+        "cryptoType": "all",
+        "tagType": "all",
+        "audited":"false",
+        "aux": [
+            "ath",
+            "atl",
+            "high24h",
+            "low24h",
+            "num_market_pairs",
+            "cmc_rank",
+            "date_added",
+            "tags",
+            "platform",
+            "max_supply",
+            "circulating_supply",
+            "total_supply",
+            "volume_7d",
+            "volume_30d"
+        ],
+        "tagSlugs":"polygon-ecosystem"
+    }
+}

package.json

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+{
+  "dependencies": {
+    "axios": "^0.24.0"
+  }
+}