If you don’t have Chrome or are on iOS you cannot tap to import the uid but you will have to paste it e.g. from the bolt card writer app. Sadly pasting does not work for a lot of phones, the context menue to paste does not show up on a long press.

The current lnbits boltcard extension includes a per-card id value in the static lnurlw.

This is terrible for user privacy as every PoS (point-of-sale) that reads the card will get an unneccesary card identifier. While this does not directly identify the user, one link to the card user will identify them for all previous transactions on that PoS system.

Compare these two lnurlw schemes:

lnbits boltcard extension
lnurlw://YOUR-DOMAIN.COM/boltcards/api/v1/scan/{YOUR_card_external_id}?p=00000000000000000000000000000000&c=0000000000000000

Bolt Card server
lnurlw://card.yourdomain.com/ln?p=00000000000000000000000000000000&c=0000000000000000

Note
It is also neccessary to ensure that GetVersion and GetCardUID do not return the card UID. I have prototyped this and verified that it is possible. This is due to be implemented in the Bolt Card app in the near future.

LUD21 update - pin on withdrawal/payment above a certain amount

• Configurable 4digit PIN per card (not UID cause random-UID is planned)
• Configurable amount
• Set card status to deactivated on 3 failed pin-retries
• Show descriptive Errors for "Wrong Pin" and "card disabled"

lnbits/tpos#16

see boltcard/bolt-nfc-android-app#37

Link seems right though

I'm creating boltcards, and it would be nice to have a simple view to show the balance of the boltcard and latest transactions, without the possibility to spend the funds or allowing full access to the wallet. The owner of the account can have this page as a bookmark on the mobile, and the actual access code of the wallet stored somewhere else, for example on separate paper or on main computer.

View with address like /public/<invoice_id> which would display balance and list latest transactions, but not divulge any additional information beyond that. This would be useful when making payments with the boltcard and allowing to quickly see the balance. The view could be used also for other useful things but initially just a view with a balance and transactions would be immensely helpful.

I have created boltcards with a QR code link to the actual wallet, but I think this is unoptimal since for example anyone can snatch the qr code quite easily when waving it around, which is quite unoptimal.

First time user trying to add first NFC card to boltcards extension v0.0.2.

Kept getting following error:

Worked fine on legend (0.0.1 extension) and someone else's instance (also 0.0.1).

Finally figured out how to manually downgrade extension (by copying files manually) to 0.0.1 on my own instance and I can now add the UID.

So I can only assume that 0.0.2 has broken things.

There should be a way to batch-generate Boltcards
Generation should include

• the link to be written to the card incl all possible mutations
• the link to be used to wipe it
• lnurlp for the same wallet
  => optionally top it up
  => write all to a .json
  ==> write one after the other to cards

Workflow analog to https://nfc-brrr.com/ just for Boltcards. Nice addition there was that you
could print one of the links (e.g. wipe-link) to a sticker, that can be put on the respective card.

REFERENCES
https://github.com/PraiaBitcoin/bulk-boltcards
https://github.com/leesalminen/bulk-boltcards
https://github.com/slaapyhoofd/brrr

LNURLP
Swiss Bitcoin Pay creates the lnurlp as randomly generated lnaddress on the fly at each tap so 0 tracking possible by ATM operator, ISPs and others.

WRITING

• Should not only be possible on own instance. Own instance should be default but configurable.
• Allow writing those one after the other e.g. with the lnbits pos-terminal where it should then be preinstalled.

If you delete a wallet without deleteing the cards first the cards are orphaned.

1. Create a wallet.
2. Enable Boltcards extension
3. Create a Card UID=12345671234567
4. Delete the wallet

That UID cannot be used on that server again.
Also the card cannot be deleted using the api leaving no easy way out.

Shouldnt the column "wallet" in the "cards"-table be a FOREIGN KEY with CASCADE DELETE?

Hello,

LNBits v0.10.9 (current branch from source)

When I use Bolt cards your extension makes hashtag #bolcard in a transaction history in a bound wallet.
When I click by hashtag I am redirected to https://mydomain.com/boltcard/?usr=.... but real links for bolt cards are https://mydomain.com/boltcards/?usr=....

I think it's bug of your extension. Or hashtag should be as #boldcards not #bolcard if it's an embeded algorithm of a redirect map.