Quickstart

npm install @threadplane/licensing @noble/ed25519

import * as ed from '@noble/ed25519';
import {
  signLicense,
  verifyLicense,
  evaluateLicense,
  type LicenseClaims,
} from '@threadplane/licensing';
 
// 1. Generate an Ed25519 keypair. In production the minting service owns the
//    private key; the public key is what `verifyLicense()` consumes.
const privateKey = ed.utils.randomPrivateKey();
const publicKey = await ed.getPublicKeyAsync(privateKey);
 
// 2. Build claims and sign them into a compact token.
const nowSec = Math.floor(Date.now() / 1000);
const claims: LicenseClaims = {
  sub: 'cus_123',
  tier: 'developer_seat',
  iat: nowSec,
  exp: nowSec + 60 * 60 * 24 * 365, // one year out
  seats: 1,
};
const token = await signLicense(claims, privateKey);
 
// 3. Offline-verify the signature against the public key.
const verified = await verifyLicense(token, publicKey);
console.log(verified.ok); // true
 
// 4. Evaluate the verify result into a status.
console.log(evaluateLicense(verified, { nowSec }).status); // 'licensed'
 
// 5. Sign a token that already expired to see the time-based statuses.
const expiredToken = await signLicense({ ...claims, exp: nowSec - 60 }, privateKey);
const expiredVerified = await verifyLicense(expiredToken, publicKey);
// Expired but inside the 14-day grace window:
console.log(evaluateLicense(expiredVerified, { nowSec }).status); // 'grace'
// Outside the grace window (push `nowSec` past exp + grace):
console.log(
  evaluateLicense(expiredVerified, { nowSec: nowSec + 60 * 60 * 24 * 30 }).status,
); // 'expired'