Never Miss a Cardano NFT Sale Again: Automating Discord Notifications with JavaScript

CardanoNFTDiscordBot.js

const Discord = require('discord.js');
const client = new Discord.Client();
const token = process.env.DISCORD_TOKEN;
const opencnftKey = process.env.OPENCNFT_KEY;
const policy = process.env.POLICY;

let lastTimeSent = undefined;
const opencnftURL = new URL(
    `https://api.opencnft.io/2/collection/${policy}/transaction`,
);

client.once('ready', () => {
    console.log('Bot is ready!');
});

client.on('message', (message) => {
    // Start sending Cardano NFT sales notifications every minute
    setInterval(async () => {
        // Code to fetch and send Cardano NFT sales notifications
        opencnftURL.searchParams.set(
            'end_time',
            lastTimeSent ? Math.floor(lastime / 1_000) : undefined,
        );
        const opencnftResponse = await fetch(opencnftURL.toString(), {
            headers: {
                'x-api-key': opencnftKey,
            },
        });
        if (opencnftResponse.ok) {
            const { transactions } = await opencnftResponse.json();

            const notification = `${transactions
                .map(
                (tx) =>
                    `New sale on ${tx.marketplace}: ${tx.name} at ₳${Math.floor(
                    tx.price / 1e6,
                    )}`,
                )
                .join('\n')}`;
            message.channel.send(notification);
            lastTimeSent = new Date();
        }
    }, 60000);
});

client.login(token);

Companion blog post: https://developers.opencnft.io/blog/discord-bot-sales-cardano-nft