Topic: Coldcard cannot read PSBT (Read 189 times)

async def ready2sign(*a):
    # Top menu choice of top menu! Signing!
    # - check if any signable in SD card, if so do it
    # - if no card, check virtual disk for PSBT
    # - if still nothing, then talk about USB connection
    import stash
    from pincodes import pa
    from glob import NFC

    # just check if we have candidates, no UI
    choices = await file_picker(None, suffix='psbt', min_size=50,
                                max_size=MAX_TXN_LEN, taster=is_psbt)

    if pa.tmp_value:
        title = '[%s]' % xfp2str(settings.get('xfp'))
    else:
        title = None

    if not choices:
        msg = '''Coldcard is ready to sign spending transactions!

Put the proposed transaction onto MicroSD card \
in PSBT format (Partially Signed Bitcoin Transaction) \
or upload a transaction to be signed \
from your desktop wallet software or command line tools.\n\n'''

        if NFC:
            msg += 'Press (3) to send PSBT using NFC.\n\n'

        msg += "You will always be prompted to confirm the details before \
any signature is performed."

        ch = await ux_show_story(msg, title=title, escape='3')
        if ch == '3' and NFC:
            await NFC.start_psbt_rx()

        return

    if len(choices) == 1:
        # skip the menu
        label,path,fn = choices[0]
        input_psbt = path + '/' + fn
    else:
        input_psbt = await file_picker('Choose PSBT file to be signed.',
                                       choices=choices, title=title,
                                       batch_sign=True, escape="9")
        if not input_psbt:
            return

    # start the process
    from auth import sign_psbt_file

    await sign_psbt_file(input_psbt)