Bitcoin Lightning Payment Cards

Here you will find the most nerdish NFC link collection for builders, coders and bitcoiners in general. Join us on a deep dive into coding and building with NFC ⚡️

While the simple LNURLw voucher work with nearly every wallet out there

not all wallets support the boltcard service yet

Github of the Boltcard LNbits extension with rolling withdraw links

https://github.com/lnbits/boltcards

Github of the LNURLw LNbits extension for static voucher links (not safe as debit card)

https://github.com/lnbits/withdraw

Building with NFC

All known tools and machines, that have been built to enable NFC payments are linked in the LNbits wiki – yes, it is mostly beertaps but not only ! 😅


Building hardware with LNbits like e.g. the Bitcoin Switch
https://github.com/lnbits/lnbits/wiki/Tooling-&-Building-with-LNbits
https://ereignishorizont.xyz/bitcoinswitch/en/
Beertaps with NFC (on a Pi)https://github.com/satoshiradio/beertap
https://codeberg.org/amiss.widen751/LN-Beertap_pi

In Action
https://twitter.com/einundzwanzigSL/status/1584467088831225856
https://twitter.com/hyperfr33/status/1571154791073562625
Raspberry Pi & NFC Module PN532https://learn.adafruit.com/adafruit-nfc-rfid-on-raspberry-pi
https://www.pcwelt.de/article/1174361/nfc-reader-mit-raspberry-pi-selbst-bauen.html (german)
https://learn.adafruit.com/adafruit-nfc-rfid-on-raspberry-pi
Adafruit https://learn.adafruit.com/adafruit-pn532-rfid-nfc/python-circuitpython
LN PoS Terminals https://twitter.com/BitcoinBeachBR/status/1606440048668291072
https://ereignishorizont.xyz/lnpos/en/ & https://github.com/lnbits/LNPoS
https://github.com/Opago-Pay (LNPoS with NFC)
Browser NFC Readerhttps://twitter.com/onthebrinkie/status/1582778857261654018
WebNFC
Collection of NFC hardware projects in actionhttps://github.com/lnbits/lnbits/wiki/Powered-by-LNbits#lnurl-nfc-cards-rings–vouchers
FOSS libraries to communicate with a NTAG424READ ONLY, only for processing Boltcards
https://github.com/pieterjm/Adafruit-PN532-NTAG424
https://github.com/MichaelAntonFischer/NDEF

READ AND WRITE, process and write Boltcards
https://github.com/bitcoin-ring/Adafruit-PN532-NTAG424
https://github.com/bitcoin-ring/boltlib/blob/develop/boltlib/protocol.py
https://github.com/lnbits/lnbits/wiki/Tooling-&-Building-with-LNbits#bolty

Coding for NFC

All known code-examples of builders, that used NFC for Lightning payments are linked in the LNbits wiki.

General Info about NFChttps://nz.mouser.com/applications/rfid-nfc-introduction/
Differences between BOLT11 invoice, LNURL-withdraw, LNURL-pay and LNURL-withdrawPOS flowshttps://github.com/theDavidCoen/LNURL-withdrawPOS#security-concerns-in-regards-to-lnurl-withdraw-links
Spec of payment request with Boltcardhttps://github.com/boltcard/boltcard/blob/main/docs/SPEC.md
Set up an own BoltCard-Serverhttps://github.com/boltcard/boltcard/blob/main/docs/INSTALL.md
Set up a BoltCard-Hub https://github.com/boltcard/boltcard-lndhub-docker

https://www.youtube.com/watch?v=Q5Iw7d6xVGA
https://youtu.be/Vtr5LvJggvc

https://fractalized.net/how-to-self-host-boltcard-lndhub-and-get-your-first-nfc-bitcoin-card-with-docker-and-umbrel/
Manually write a BoltCard (nerds only)https://github.com/boltcard/boltcard/blob/main/docs/CARD_MANUAL.md

https://community.nxp.com/t5/NFC/Configuring-NTAG-424-DNA-with-Encrypted-Part-and-CMAC-Part/m-p/1049316/highlight/true#M7082

https://www.whitewolftech.com/articles/payment-
Additional Tools to write a BoltCard With the Bolty https://github.com/lnbits/lnbits/wiki/Tooling-&-Building-with-LNbits

With the BoltCard Wallet App https://boltcardwallet.com/ (for this you will need to also run a BoltCard Hub, see above)
Set up the BoltCard-App from sourcehttps://github.com/boltcard/bolt-nfc-android-app
NTAG424 Technical specificationshttps://www.nxp.com/docs/en/application-note/AN12

https://www.nxp.com/docs/en/application-note/AN12343.pdf

https://www.nxp.com/products/rfid-nfc/nfc-hf/nfc-with-ios-13-:NFC_IOS_13#resources
USB-Access driver, needed mainly for iOS & Linux https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers
Accepting LN through WebNFC

Web-NFC Specification

How can i use WebNFC (e.g. on a tablet)		https://web.dev/nfc/#security-and-permissions

https://w3c.github.io/web-nfc/

https://caniuse.com/?search=NFC
Nostr Bot to control a BoltCardhttps://github.com/ponthief/nostr_boltcard_bot/

History of Bitcoin NFC payments

As first of its kind NFC Device used for lightning payments the HCCP Badge had two buttons – one to get paid and one to be paid.

https://github.com/taxmeifyoucan/HCPP2021-Badge

Support groups on Telegram

BoltCard https://t.me/bolt_card

LNbits https://t.me/lnbits

Maker-Groups

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