catch (err) // 3. Offline fallback: check signed license token const offlineLicense = await getOfflineSignedLicense(); if (offlineLicense && offlineLicense.graceEnd > Date.now()) return offlineLicense; // Allow limited use
throw new Error('License validation failed'); ie tab license key
async function validateLicense(key, machineId) // 1. Local cache check (valid for 24h) const cached = await getValidCachedLicense(); if (cached && !isExpired(cached)) return cached; // 2. Online validation try const response = await fetch('https://license.ietab.com/validate', method: 'POST', body: JSON.stringify( key, machineId, version: '3.0' ) ); const data = await response.json(); if (data.valid) await storeEncryptedLicense(data.license); return data.license; catch (err) // 3
"keyHash": "sha256(license_key)", "machineId": "stable_fingerprint", "plan": "pro", "features": ["unlimited_sites", "gpo_support", "sso"], "expiresAt": 1735689600000, "lastValidated": 1733000000000, "seatsUsed": 1, "signature": "base64(signed_by_private_key)" if (offlineLicense && offlineLicense.graceEnd >