first commit

Back/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

Back/README.md

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+# Crypto Assets Monitor (Backend)
+
+## Download
+
+```bash
+git clone https://github.com/vaidis/Crypto-Assets-Monitor.git
+```
+
+## Install
+
+```bash
+cd CryptoAssets-Monitor/Back
+npm install
+```
+
+## Run
+
+```bash
+npm start
+```
+
+## Endpoints
+
+```bash
+GET /kraken/assets
+GET /kraken/assetpairs?asset=BTC
+GET /kraken/ohlc?pair=XXBTCUSDT&interval=60
+```
+
+## Test Endpoints
+```bash
+curl --location --request GET 'http://localhost:8080/kraken/assets'
+curl --location --request GET 'http://localhost:8080/kraken/assetpairs?asset=XBT'
+curl --location --request GET 'http://localhost:8080/kraken/ohlc?pair=XXBTZEUR&interval=60'
+```
+
+or import the [postman_collection.json](./postman_collection.json) to postman rest api client

Back/index.js

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+const app = require('./src/app');
+const config = require('./src/config')
+
+var server = app.listen(config.app.port, function () {
+   var port = server.address().port
+   console.log("Candlestick api listening at http://localhost:%s", port)
+})

Back/package.json

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+{
+  "name": "candlestick-app-backend",
+  "version": "1.0.0",
+  "description": "Candlestick REST API with node js.",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/anantkolvankar/candlestick-app-backend.git"
+  },
+  "author": "anantkolvankar",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/anantkolvankar/candlestick-app-backend/issues"
+  },
+  "homepage": "https://github.com/anantkolvankar/candlestick-app-backend#readme",
+  "dependencies": {
+    "express": "^4.17.1",
+    "request": "^2.88.2"
+  }
+}

Back/src/app.js

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+var http = require("http");
+var express = require('express');
+var app = express();
+
+app.use(function(req, res, next) {
+  res.header("Access-Control-Allow-Origin", "*");
+  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
+  next();
+});
+
+var ApplicationController = require('./application_controller');
+app.use('', ApplicationController);
+module.exports = app;

Back/src/application_controller.js

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+var express = require('express');
+var router = express.Router();
+const api_helper = require('./thirdparty_api')
+const config = require('./config');
+
+
+
+router.get('/coins/markets', function (req, res) {
+  // let pair = req.query.pair;
+  // let interval = req.query.interval;
+  
+  let url = config.coingecko.api_url + '/coins/markets?vs_currency=usd&order=market_cap_desc&per_page=100&page=1&sparkline=false';
+
+  api_helper.REMOTE_API_call(url)
+    .then(response => {
+      console.log("url: ", url);
+      console.log("response: ", response);
+      res.json(response);
+    })
+    .catch(error => {
+      console.log("error: ", error);
+      res.send(error);
+    })
+})
+
+module.exports = router;

Back/src/config.js

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+const config = {
+ app: {
+   port: 8080
+ },
+ coingecko: {
+  api_url: 'https://api.coingecko.com/api/v3'
+} 
+};
+
+module.exports = config;

Back/src/thirdparty_api.js

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+const request = require('request')
+
+module.exports = {
+    REMOTE_API_call : function(url){
+        return new Promise((resolve, reject) => {
+            request(url, { json: true }, (err, res, body) => {
+              if (err) reject(err)
+              resolve(body)
+            });
+        })
+    }
+}