TypeScript & Node.js License Validation with Avalex

npm install node-fetch

import fetch from "node-fetch";
import * as crypto from "crypto";
import * as os from "os";

const AVALEX_URL = "http://localhost:8080/licenses/validate";
const PRODUCT_ID = "prod_enterprise_2026";

function generateHWID(): string {
  const raw = `${os.hostname()}-${os.arch()}-${os.cpus()[0].model}`;
  return crypto.createHash("sha256").update(raw).digest("hex").toUpperCase().slice(0, 32);
}

interface ValidationResponse {
  valid: boolean;
  error?: string;
}

export async function checkAvalexLicense(licenseId: string): Promise<boolean> {
  const hwid = generateHWID();
  try {
    const res = await fetch(AVALEX_URL, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ licenseId, productId: PRODUCT_ID, hwid }),
    });
    if (res.status === 429) {
      console.warn("Avalex rate limit hit.");
      return false;
    }
    if (!res.ok) return false;
    const data = (await res.json()) as ValidationResponse;
    return data.valid === true;
  } catch (err) {
    console.error("Network error validating Avalex license:", err);
    return false;
  }
}