Discord ボットのプレミアムを、1 キーにつき 1 サーバーで。

import { MessageFlags } from "discord.js";
import { SunLicense } from "sunlicense";

const sl = new SunLicense({ baseUrl: "https://api.sunlicense.com",
  token: process.env.SUNLICENSE_API_KEY });

// /premium activate key:AX8P-XXXX-XXXX-XXXX
export async function activate(interaction) {
  const key = interaction.options.getString("key", true);
  // the guild is the "machine": a 1-server policy stops sharing
  const r = await sl.validate(key, { host: interaction.guildId });
  if (r.valid) await premiumGuilds.save(interaction.guildId, key);
  await interaction.reply({ flags: MessageFlags.Ephemeral, content: r.valid
    ? "✓ Premium active in this server"
    : `This server has no premium license (${r.data?.code})` });
}