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Peter D. Gray 2025-09-16 10:34:33 -04:00
parent 3fa25b2d09
commit c1b932685d
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4 changed files with 12 additions and 12 deletions

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@ -26,16 +26,17 @@ When a Spending Policy is in effect, there are limitations
in effect:
- Firmware updates are blocked.
- There is no way to backup the COLDCARD
- There is no way to backup the COLDCARD.
- Seed vault and Secure Notes are read-only (and can also be hidden).
- Settings menu is inaccessible.
- BIP-39 passphrases may be blocked (optional).
We recommend getting the COLDCARD fully configured and setup
for typical transactions before enabling the Spending Policy.
# Setup Spending Policy
Visit `Advanced / Tool > Spending Policy` menu and choose
Visit `Advanced / Tools > Spending Policy` menu and choose
"Single-Signer". First some background information is shown,
then you are prompted to define the "Bypass PIN". This PIN code
is only used when you need to disable the spending policy, but is
@ -137,21 +138,18 @@ holding a copy of the seed words.
## Passphrase Considerations
If you are using a BIP-39 passphrase for everything, you should
If you are using the same BIP-39 passphrase for everything, you should
probably do a "Lock Down Seed" (Advanced/Tools > Danger Zone > Seed
Functions) first. This takes your master seed and BIP-39 passphrase
and cooks them together into an XPRV which then is stored as your
master secret. (It is not a seed phrase anymore.) This process
master secret. (Replacing the master seed phrase.) This process
cannot be reversed, so other funds you may have on the same seed
words are protected. Once you are operating in XPRV mode, you can
define a spending policy and know that it is restricted to only
define a spending policy, and know that it is restricted to only
that wallet.
You could, alternatively, can also block access to other related
keys, which removes the "Passphrase" entry option from the main
menu, but that protection doesn't seem as strong. When operating in
XPRV mode, the "Passphrase" menu item is not shown because
BIP-39 passwords cannot be applied to XPRV secrets.
When operating in XPRV mode, the "Passphrase" menu item is not shown
because BIP-39 passwords cannot be applied to XPRV secrets.
## Trick PIN Thoughts
@ -208,3 +206,4 @@ reset except for the main PIN code which is unchanged. Once you've
done that, you can enter your seed words from backup (or restore a
backup file) and continue to use the COLDCARD again.

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@ -101,6 +101,7 @@ def render_backup_contents(bypass_tmp=False):
if k == 'words': continue # words length is recalculated from secret
if k == 'ccc': continue # not supported, security issue
if k == 'ktrx': continue # not useful after the fact
if k == 'lfr': continue # temporary error msg value
if k == 'seedvault' and not v: continue
if k == 'seeds' and not v: continue
ADD('setting.' + k, v)

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@ -51,7 +51,7 @@ class QRDecodeExplained(ValueError):
class UnknownAddressExplained(ValueError):
pass
# We're not going to co-sign using spending policy features
# We're not going to (co-)sign using spending policy features
class SpendPolicyViolation(RuntimeError):
pass

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@ -123,7 +123,7 @@ async def web2fa_enroll(ss=None):
await show_qr_code(qr, is_alnum=False, msg="Import into 2FA Mobile App",
force_msg=True)
# important: force them to prove they store it correctly
# important: force them to prove they stored it correctly
ok = await perform_web2fa('Enroll: COLDCARD', ss)
if ok: break