bot.js

// Require dependencies
const { Client } = require('discord.js');
const dotenv = require('dotenv');
const axios = require('axios');

// Load environment variables
dotenv.config();

// Create a bot instance
const bot = new Client();

// Log our bot in
bot.login(process.env.DISCORD_BOT_TOKEN);

// Log to console when bot is ready
bot.on('ready', () => {
  console.log(`${bot.user.username} is up and running!`);
});

// Reply to user messages
bot.on('message', async (message) => {
  // Do not reply if message was sent by bot
  if (message.author.bot) return;

  // Reply to !ping
  if (message.content.startsWith('!ping')) {
    return message.reply('I am working!');
  }

  // Reply to !price
  if (message.content.startsWith('!price')) {
    // Get the params
    const [command, ...args] = message.content.split(' ');

    // Check if there are two arguments present
    if (args.length !== 2) {
      return message.reply(
        'You must provide the crypto and the currency to compare with!'
      );
    } else {
      const [coin, vsCurrency] = args;
      try {
        // Get crypto price from coingecko API
        const { data } = await axios.get(
          `https://api.coingecko.com/api/v3/simple/price?ids=${coin}&vs_currencies=${vsCurrency}`
        );

        // Check if data exists
        if (!data[coin][vsCurrency]) throw Error();

        return message.reply(
          `The current price of 1 ${coin} = ${data[coin][vsCurrency]} ${vsCurrency}`
        );
      } catch (err) {
        return message.reply(
          'Please check your inputs. For example: !price bitcoin usd'
        );
      }
    }
  }

  // Reply to !news
  if (message.content.startsWith('!news')) {
    try {
      const { data } = await axios.get(
        `https://newsapi.org/v2/everything?q=crypto&apiKey=${process.env.NEWS_API_KEY}&pageSize=1&sortBy=publishedAt`
      );

      // Destructure useful data from response
      const {
        title,
        source: { name },
        description,
        url,
      } = data.articles[0];

      return message.reply(
        `Latest news related to crypto:\n
        Title: ${title}\n
        Description:${description}\n
        Source: ${name}\n
        Link to full article: ${url}`
      );
    } catch (err) {
      return message.reply('There was an error. Please try again later.');
    }
  }

  // Reply to !help
  if (message.content.startsWith('!help')) {
    return message.reply(
      `I support 4 commands:\n
      !ping - To check if I am working\n
      !price <coin_name> <compare_currency> - To get the price of a coin with respect to another coin or currency\n
      !news - To get the latest news article related to crypto\n
      !help - For checking out what commands are available`
    );
  }
});