> 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/vault/sign-a-transaction/bitcoin.md).

# Bitcoin review screen

PSBT details, ordinals warnings and message signing.

Bitcoin requests arrive as a **PSBT** (partially signed Bitcoin transaction). The Vault decodes it fully on the device.

{% stepper %}
{% step %}

### The PSBT summary

The headline is **Bitcoin transaction (PSBT)**. You see **Leaving the account** (the total that leaves), the **Network fee**, then the list of **Inputs** and **Outputs**. Each output is tagged **MINE**, **change** or **external** so you can spot exactly where money goes.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-b1d7c8d4f41ceb486aaa77d9e8798e199065da08%2F01-psbt-review.png?alt=media" alt="psbt review"><figcaption><p>Inputs, outputs and fee, decoded on the Vault.</p></figcaption></figure>
{% endstep %}

{% step %}

### Ordinals and unknown fees

If an input comes from your **Ordinals** address, the Vault warns you: spending it could destroy an inscription. If an input amount is missing from the PSBT, the fee shows **UNKNOWN** and you must tick *I understand the fee cannot be verified on this device* before signing.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-39cfd1dcbce020069d51eb10b23676087f1fdcec%2F02-ordinals-warning.png?alt=media" alt="ordinals warning"><figcaption><p>The fee-unknown warning and its acknowledgement box.</p></figcaption></figure>
{% endstep %}

{% step %}

### A Bitcoin message

**Bitcoin message signature** shows the full text, the **Signing address** and who requested it. Signing proves you own the address; it cannot move funds, but a site can use it to log you in.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-7dfdc41995aa9ebe6c84c247c67fe5ac7957a0d0%2F03-message-review.png?alt=media" alt="message review"><figcaption><p>A message signature request.</p></figcaption></figure>
{% endstep %}
{% endstepper %}

{% hint style="warning" %}
**"No input belongs to this account":** the PSBT spends coins this Vault does not hold. Signing is refused. Import the right account or refuse the request.
{% endhint %}

## Learn more

* [Send Bitcoin from the extension](/browser-extension/send/bitcoin.md)
* [Bitcoin watch-only](/vault/bitcoin-watch-only.md)


---

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