Deploying a Discord Bot as a Vercel Serverless Function

{
	"name": "my-bot",
	"version": "1.0.0",
	"dependencies": {
		"discord-interactions": "^2.0.2",
		"raw-body": "^2.4.1"
	}
}

const {
	InteractionResponseType,
	InteractionType,
	verifyKey,
} = require("discord-interactions");
const getRawBody = require("raw-body");
 
const INVITE_COMMAND = {
	name: "Invite",
	description: "Get an invite link to add the bot to your server",
};
 
const HI_COMMAND = {
	name: "Hi",
	description: "Say hello!",
};
 
const INVITE_URL = `https://discord.com/oauth2/authorize?client_id=${process.env.APPLICATION_ID}&scope=applications.commands`;
 
/**
 * Gotta see someone 'bout a trout
 * @param {VercelRequest} request
 * @param {VercelResponse} response
 */
module.exports = async (request, response) => {
	// Only respond to POST requests
	if (request.method === "POST") {
		// Verify the request
		const signature = request.headers["x-signature-ed25519"];
		const timestamp = request.headers["x-signature-timestamp"];
		const rawBody = await getRawBody(request);
 
		const isValidRequest = verifyKey(
			rawBody,
			signature,
			timestamp,
			process.env.PUBLIC_KEY,
		);
 
		if (!isValidRequest) {
			console.error("Invalid Request");
			return response.status(401).send({ error: "Bad request signature " });
		}
 
		// Handle the request
		const message = request.body;
 
		// Handle PINGs from Discord
		if (message.type === InteractionType.PING) {
			console.log("Handling Ping request");
			response.send({
				type: InteractionResponseType.PONG,
			});
		} else if (message.type === InteractionType.APPLICATION_COMMAND) {
			// Handle our Slash Commands
			switch (message.data.name.toLowerCase()) {
				case SLAP_COMMAND.name.toLowerCase():
					response.status(200).send({
						type: 4,
						data: {
							content: "Hello!",
						},
					});
					console.log("Slap Request");
					break;
				case INVITE_COMMAND.name.toLowerCase():
					response.status(200).send({
						type: 4,
						data: {
							content: INVITE_URL,
							flags: 64,
						},
					});
					console.log("Invite request");
					break;
				default:
					console.error("Unknown Command");
					response.status(400).send({ error: "Unknown Type" });
					break;
			}
		} else {
			console.error("Unknown Type");
			response.status(400).send({ error: "Unknown Type" });
		}
	}
};