> For the complete documentation index, see [llms.txt](https://doc.lockerprotocol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.lockerprotocol.com/start-here/your-first-signature.md).

# Your first signature (zero-stakes tutorial)

Practice the QR loop once with nothing at stake, so the real thing feels familiar.

The extension has a built-in practice run. It asks the Vault to sign a message that does nothing and moves nothing. You get to try the whole QR loop without any risk.

## What you need

* The extension connected to your Vault (see [Set up in 3 steps](/start-here/set-up-in-3-steps.md)).
* Your Vault, unlocked.

{% stepper %}
{% step %}

### Click "Try it" on the tutorial banner

On the extension's home screen, a banner says *New here? Try a zero-stakes first signature to learn the QR loop.* Click **Try it**.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-605da1d08a2dd78f929fda1d46d293cd196f4102%2F01-home.png?alt=media" alt="tutorial banner"><figcaption><p>The tutorial banner on the home screen.</p></figcaption></figure>
{% endstep %}

{% step %}

### Read the practice request

The extension shows what it is about to ask the Vault: a harmless message to sign. Nothing here can spend anything.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-0806f086a1fe41f857a09a4bcd78d29131e50669%2F03-tutorial-qr.png?alt=media" alt="tutorial request"><figcaption><p>The practice request. It is only a message.</p></figcaption></figure>
{% endstep %}

{% step %}

### Show the animated QR to the Vault

The extension displays a moving QR code. On the Vault, tap the round **Sign** button: the camera opens. Point it at your screen. Keep it there until the Vault says the code is fully read.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-0806f086a1fe41f857a09a4bcd78d29131e50669%2F03-tutorial-qr.png?alt=media" alt="tutorial qr"><figcaption><p>The extension's animated QR. The frame counter shows progress.</p></figcaption></figure>
{% endstep %}

{% step %}

### Check the Vault's review screen, then Sign

The Vault shows **Review before signing**, with the message text and the account. Tap **Sign**, and enter your password if asked.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-6dd751b5ac23e746303e849e54e557102153990f%2F02-message-review.png?alt=media" alt="vault tutorial review"><figcaption><p>The Vault's review screen for the practice message.</p></figcaption></figure>
{% endstep %}

{% step %}

### Show the Vault's signed QR to the webcam

The Vault now displays **Signed! Show the QR to the extension.** Hold it up to your computer's camera.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-21baf0198aa309545394eacee89ce0b47a80e7be%2F07-signed-qr.png?alt=media" alt="vault signed qr"><figcaption><p>The signed answer, as a QR on the Vault.</p></figcaption></figure>
{% endstep %}

{% step %}

### Done

The extension confirms it received a valid signature. You have just completed a full QR loop. Real transactions work exactly the same way, with a real review screen in the middle.
{% endstep %}
{% endstepper %}

{% hint style="info" %}
**What you learned:** request on the computer → read on the Vault → sign on the Vault → answer back to the computer. Every real signature follows these four moves.
{% endhint %}

{% hint style="warning" %}
**If something goes wrong**

* *The Vault says "Address not recognized":* the extension is watching an account that is not on this Vault. Re-sync from the right Vault.
* *The extension says "That QR does not answer this request":* you showed an old signature. Do the loop again from the start.
* *The camera is blurred on purpose:* that is normal. Both apps blur the preview so nobody can read a code over your shoulder. Scanning still works.
  {% endhint %}

## Learn more

* [Sign a transaction on the Vault](/vault/sign-a-transaction.md)
* [Sign what a dApp asks](/browser-extension/sign-what-a-dapp-asks.md)


---

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