getCoinsCG.js

const fs = require('fs');
const chalk = require('chalk');

//
//
// The purpose of this function is to gather all available tickers on CoinGecko and write them in JSON format to file.
// This is so the bot can check and verify coin existence, and also refer to the coins by their market ticker instead of the full name.
// This file should be run once before starting the bot for the first time. It will be auto-run by the bot after.
//
//

// Make API call and do JSON build operation
var update = async () => {
  let data, tickers = [];
  try {
    const response = await fetch('https://api.coingecko.com/api/v3/coins/list?include_platform=false');
    
    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }
    
    data = await response.json();
    
    for (const value of data) {
      tickers.push(value.symbol.toUpperCase());
    }
  } catch (err) {
    console.log(chalk.red(`Unable to grab list of all CG coins: ${err.message}`));
  }

  //console.log(data);

  // Write the identification JSON to file
  fs.writeFileSync('./common/coinsCG.json', JSON.stringify(data));
  fs.writeFileSync('./common/coinsCGtickers.json', JSON.stringify(tickers));
  //console.log("CoinGecko coin list complete!");
};

update();

exports.update = update;