Sometimes getLicense returns null after validateCheckoutKey

[lucabrini]

Hello, I'm trying to use offline licensing. I'm currently validating the key using validateCheckoutKey() but sometimes it's seems that the machine lic file is not being saved on the device because the next time the app is opened getLicense() returns null.

The problem shows up when app is fully reopen. If I just reload the app using right click -> reload of tauri, the license is kept in memory.

https://github.com/user-attachments/assets/02b262ad-1551-413c-b04b-fc162e9acca5

Here's the LicenseManager class that I've written.

import {
    getLicense,
    resetLicense,
    validateCheckoutKey,
    type KeygenError,
    type KeygenLicense
} from 'tauri-plugin-keygen-api';

class LicenseManager {
    private static _instance: LicenseManager | null = null;

    private _license : KeygenLicense | null = null;
    private _ready: boolean = false;

    private constructor() {}

    public async init() {
        console.log('LicenseManager init');

        if (this._ready) return;

        const license = await getLicense(); // sometimes this is null
                console.log('License:', license);
        if (license) {
            this._license = license;
        }
        this._ready = true;
    }

    public async validate(key: string) {
        try {
            let validationResults = await validateCheckoutKey({
                key,
                entitlements: ['ADMIN'],
                ttlForever: true
            });
            this._license = validationResults;
            console.log('Validation:', validationResults);
            return true;
        } catch (e) {
            alert((e as KeygenError).detail);
            return false;
        }
    }

    public async logout() {
        await resetLicense();
    }

    public static get instance(): LicenseManager {
        if (!LicenseManager._instance) {
            LicenseManager._instance = new LicenseManager();
        }
        return LicenseManager._instance;
    }

    public get license(): KeygenLicense | null {
        return this._license;
    }

    public get isLicensed(): boolean {
        const valid = this._license?.valid ?? false;
        return valid;
    }
}

export default LicenseManager;

[lucabrini]

It seems like that waiting around one minute it starts working

[lucabrini]

After an entire day of debugging I've found the issue. I'm gonna open a PR right now

[bagindo]

Hi @lucabrini good catch! I'm merging your PR. Thanks!

[lucabrini]

Heiii! Niceee! You're welcome sir!

I saw that the build has failed for macos due to the time library. I've also met this issue in my project. Time cargo package needs to be updated to 0.3.36

[bagindo]

@lucabrini got it. I'll update it along with v2 update.