Discord command handler for creating emoji (short version)

createEmojiCommand.js

const command = async interaction => {
    // extract options from slash command
    const emojiName = interaction.options.get('name', true).value
    const { attachment } = interaction.options.get('image', true)
    const fit = interaction.options.get('fit', false)?.value || 'cover'

    // construct params for API endpoint
    const emojiImageParams = new URLSearchParams()
    emojiImageParams.append('image', attachment.url)
    emojiImageParams.append('fit', fit)

    // since fetch is async we show a loading indicator to user
    await interaction.deferReply({ ephemeral: true, fetchReply: true })
    
    // my API endpoint
    const emojiImage = await fetch(`/discord/emoji?${emojiImageParams.toString()}`)
        .then(res => res.arrayBuffer())

    const emoji = await interaction.guild.emojis.create({
        name: emojiName,
        attachment: Buffer.from(emojiImage)
    })

    await interaction.editReply({ content: `Done! You can use new emoji with :${emoji.name}:` })
}

export default command