Joe Uhren
9851e2ce9d
-As of Feb 2024 the free "keyless" coingecko api will be deprecated and will likely stop working. There is a free demo api key that can be used which can now be plugged into the explorer settings to allow the coingecko api to continue working. Read more here: https://support.coingecko.com/hc/en-us/articles/21880397454233
87 lines
3.6 KiB
JavaScript
87 lines
3.6 KiB
JavaScript
const request = require('postman-request');
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const base_url = 'https://api.coingecko.com/api/v3/';
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function get_coin_list(api_key, cb) {
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request({ uri: base_url + 'coins/list?include_platform=false' + (api_key == null || api_key == '' ? '' : '&x_cg_demo_api_key=' + api_key), json: true}, function (error, response, body) {
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if (error)
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return cb(error, []);
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else if (body == null || body == '' || typeof body !== 'object')
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return cb('No data returned', []);
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else if (body['status'] != null && body['status']['error_message'] != null && body['status']['error_message'] != '')
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return cb(body['status']['error_message'], []);
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else
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return cb(null, body);
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});
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}
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function get_simple_price(id, currency, market_array, api_key, cb) {
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request({ uri: base_url + `simple/price?ids=${id.toLowerCase()}&vs_currencies=usd${currency == null || currency == '' ? '' : `,${currency}`}` + (api_key == null || api_key == '' ? '' : '&x_cg_demo_api_key=' + api_key), json: true}, function (error, response, body) {
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if (error)
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return cb(error, 0, 0);
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else if (body == null || body == '' || typeof body !== 'object')
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return cb('No data returned', 0, 0);
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else if (body['status'] != null && body['status']['error_message'] != null && body['status']['error_message'] != '')
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return cb(body['status']['error_message'], 0, 0);
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else {
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try {
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if (market_array != null) {
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// multiple currencies need to be combined before return
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let last_price = 0;
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let last_usd_price = 0;
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let counter = 0;
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// loop through all api object keys
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Object.keys(body).forEach(function(key, index, map) {
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const market_index = market_array.findIndex(p => p.coingecko_id.toLowerCase() == key.toLowerCase());
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// check if the currency is found in the market_array
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if (market_index > -1) {
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// calculate the market and usd prices
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last_price += (market_array[market_index].last_price * (currency == null || currency == '' ? 0 : body[key][currency.toLowerCase()]));
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last_usd_price += (market_array[market_index].last_price * body[key]['usd']);
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counter++;
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}
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});
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// check if the counter is greater than 0
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if (counter > 0) {
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// average the market and usd prices
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last_price = (last_price / counter);
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last_usd_price = (last_usd_price / counter);
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}
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return cb(null, last_price, last_usd_price);
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} else {
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// single currency
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return cb(null, (currency == null || currency == '' ? 0 : body[id.toLowerCase()][currency.toLowerCase()]), body[id.toLowerCase()]['usd']);
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}
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} catch(err) {
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return cb('Received unexpected API data response', 0, 0);
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}
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}
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});
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}
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module.exports = {
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get_coin_data: function (api_key, cb) {
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get_coin_list(api_key, function (err, coin_list) {
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return cb(err, coin_list);
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});
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},
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get_market_prices: function (id, currency, api_key, cb) {
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get_simple_price(id, currency, null, api_key, function (err, last_price, last_usd) {
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if (last_price == null)
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console.log(`Error: "${currency}" is not a valid coingecko api currency`);
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return cb(err, last_price, last_usd);
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});
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},
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get_avg_market_prices: function (id, currency, market_array, api_key, cb) {
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get_simple_price(id, currency, market_array, api_key, function (err, last_price, last_usd) {
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if (last_price == null)
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console.log(`Error: "${currency}" is not a valid coingecko api currency`);
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return cb(err, last_price, last_usd);
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});
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}
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}; |