> For the complete documentation index, see [llms.txt](https://docs.tiun.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tiun.io/reference/time-based/access.md).

# Access

Time-based access is **binary** at the session level — at any moment a user either has access or they don't. tiun signals this to your app through two events: **`paywallShow`** and **`paywallHide`**.

***

## Paywall events

| Event             | Meaning                                                                                                                                                                                              |
| ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **`paywallShow`** | The user should **not** see paid content. Either there's no active session, the session ended, payment failed, or your integration has explicitly paused access. Render the paywall or locked state. |
| **`paywallHide`** | The user **has** access. The billing session is Active. Reveal premium UI.                                                                                                                           |

These map directly to session state — see [Sessions](/reference/time-based/sessions.md) for the Locked / Active / Ended lifecycle. `paywallHide` corresponds to entering Active; `paywallShow` corresponds to leaving it.

***

## What the `paywallHide` payload includes

When access is granted, the `paywallHide` event payload includes a **`sessionId`**. Use it when you need to verify the session on your backend before serving premium content — see [server-side session verification](/guides/time-based-billing/verify-server-side.md).

```javascript
tiun.on('paywallHide', (data) => {
  console.log('Session is active:', data.sessionId);
  showPremiumContent();
});

tiun.on('paywallShow', () => {
  hidePremiumContent();
  showPaywall();
});
```

***

## Where to go next

* For UI gating patterns and metering with `setContent()`, see [Protecting content](/reference/time-based/protecting-content.md).
* For the full event payload spec, see [SDK events](/sdk/reference/events.md).


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