---
url: /geosync-pro-whmcs/features/file-integrity.md
description: >-
  How GeoSync Pro keeps itself healthy with HMAC-SHA256 integrity checks,
  automatic self-repair on admin page load, and a clear sync history you can
  review at any time.
---

# File integrity

GeoSync Pro watches over its own files and records to make sure nothing has been accidentally
changed or corrupted — and quietly repairs itself when it spots a problem. You don't need to do
anything technical; this page simply explains what's happening behind the scenes.

![The Sync Status panel in the WHMCS admin](/geosync-pro-whmcs/img/geosync-file-integrity-sync-status.png)
*Addons → GeoSync Pro → Settings → Sync Status*

## Tamper detection you can trust

Every GeoSync Pro file has a secure fingerprint (an **HMAC-SHA256** checksum — a tamper-evident
signature). Its key database records are signed the same way. That means GeoSync Pro can tell if:

* a **file** has been altered, damaged or is missing, and
* a **database** record has been changed outside the module.

A baseline of these fingerprints is created when you first activate GeoSync Pro, and refreshed
after every sync — so the module always knows what "correct" looks like.

## Auto-Sync: self-repair on page load

Whenever you open a GeoSync Pro admin page, **Auto-Sync** checks the fingerprints. If it finds a
mismatch — for example after an interrupted upload — it re-deploys or repairs the affected files
automatically. Most of the time this happens without you ever noticing.

::: info Where to see it
The **Sync Status** panel shows the current deployment health and file-integrity status at a
glance.
:::

## Sync history and manual sync

The **Sync history** table records each check and repair, with the **Date**, **Changes**,
**Action**, **Status** and a short **Message** — so you can confirm everything is healthy or see
what was fixed and when.

You can also run a check yourself at any time with the manual **Sync** control. On success you'll
see the flash message *"Sync completed successfully."*

::: tip When to run a manual sync
After a manual file update, or if something looks off, open **Addons → GeoSync Pro → Settings →
Sync Status** and run **Sync** to verify and repair in one step.
:::

## Related

* [Configuration](/geosync-pro-whmcs/configuration) — where all your settings live.
* [Settings reference](/geosync-pro-whmcs/settings) — every option explained.