Add QR support for Blockstream Jade

Blockstream Jade will support QR communications in the next firmware release.

In order for this to work with Specter successfully:

1. The “Scan QR Code” option will need to be added for Jade in the “Add new device” flow. Jade will display a ur:crypto-account for the user’s selected path (m/84’, m/49’, m/48h/0h/0h/1h, m/48h/0h/0h/2h). This is already working with Specter fine when scanning Jade as an ‘Other’ device - just need the option added to Jade.

2. When displaying a PSBT for Jade to scan, Specter will need to show a ur:crypto-psbt. This appears to be similar to how Keystone is treated, as Specter will display that format when Keystone is a device linked to the wallet

[stepansnigirev]

@moneymanolis you are correct, QR protocol is the same as in keystone, so we only need to enable QR codes for jade.

I think having QR format as an attribute makes more sense, would be nice to refactor qrcode component using that instead of the prefix

[moneymanolis]

I think we’ll need to add this method to jade.py, similar to keystone.py, to prepend “crypto-psbt:” for the qr-code web component.

    def create_psbts(self, base64_psbt, wallet):
        psbts = super().create_psbts(base64_psbt, wallet)
        # make sure nonwitness and xpubs are not there
        qr_psbt = wallet.fill_psbt(base64_psbt, non_witness=False, xpubs=False)
        # add a hint to <qr-code> tag that this should be encoded as crypto-psbt
        psbts["qrcode"] = f"crypto-psbt:{qr_psbt}"
        return psbts

@stepansnigirev wouldn’t be easier to add an attribute regarding the qr code format to the devices (which format they can read) and then also add an attribute to the qr-code web component? So, similar to animate="{{device.qr_code_animate}}".