revanced-bots/bots/discord/registerCommands.js

import { REST, Routes } from 'discord.js';
import { readdirSync, readFileSync } from 'node:fs';
const configJSON = readFileSync('../config.json', 'utf-8');
const config = JSON.parse(configJSON);

const commands = [];
// Grab all the command files from the commands directory you created earlier
const commandFiles = readdirSync('./commands').filter((file) =>
	file.endsWith('.js')
);

// Grab the SlashCommandBuilder#toJSON() output of each command's data for deployment
for (const file of commandFiles) {
	const command = await import(`./commands/${file}`);
	commands.push(command.default.data.toJSON());
}

// Construct and prepare an instance of the REST module
const rest = new REST({ version: '10' }).setToken(config.discord.token);

try {
	console.log(
		`Started refreshing ${commands.length} application (/) commands.`
	);

	// The put method is used to fully refresh all commands in the guild with the current set
	const data = await rest.put(Routes.applicationCommands(config.discord.id), {
		body: commands
	});

	console.log(`Successfully reloaded ${data.length} application (/) commands.`);
} catch (error) {
	// And of course, make sure you catch and log any errors!
	console.error(error);
}