Here's an example bot that you can use.

const { Client } = require('dogehq');

const client = new Client();
const config = {
    token: 'your_token_here',
    refreshToken: 'your_refresh_token_here',
    prefix: 'your_preffered_prefix_here',
};

// when the client is ready
client.once('ready', () => {
    console.log('Ready!');

    // join the top room
    client.rooms.first().join();
});

client.on('message', (message) => {
    if (!message.content.startsWith(config.prefix)) return; // if the message doesn't start with the prefix, dont respond

    const args = message.content.slice(config.prefix.length).trim().split(/ +/);
    const command = args.shift().toLowerCase();

    if (command === 'ping') {
        message.room.send('Pong!');
    } else if (command === 'pong') {
        message.room.send('Ping!');
    } else if (command === 'food') {
        if (args.length === 0) return; // if the argument isnt there, dont respond
        message.room.send(`You like ${args[0]}? I like it too!`);
    }
});

client.login(config.token, config.refreshToken);