Hi everyone, as suggested by Lucas de C. Ferreira and Ryan Gentry, I submitted a PR for a new bLIP for a common NFC payment flow that uses LNURL protocol - specifically LNURL-withdraw sub-protocol - which I called *LNURL-withdrawPOS*: https://github.com/lightning/blips/pull/16
Please note: this is NOT a new LNURL sub-protocol but an attempt to reach an open and common standard for the receiving part of the flow (merchant Point of Sale with NFC sensor). *Abstract* LNURL-withdraw is a bech32-encoded HTTPS query string or sub-protocol of LNURL which gives the users the ability to receive funds via Lightning Network without the need of manually creating an invoice. Users scan a QRcode or paste the LNURL-withdraw link into their wallet, this queries a server and gets a JSON with some info, such as the max amount the user can receive, the min amount the user can request, etc. Then the wallet typically asks the user to enter an amount and under the hood it creates a Lightning invoice and sends it to the service provider, which eventually pays that. So the only things the users have to do are: 1. Scan the QR code / paste the LNURL-withdraw link into the wallet 2. Enter the amount to receive 3. Confirm In this repo I schematize a LNURL-withdraw flow for POS, which sees the interaction between the user and a POS equipped with a NFC sensor. This bLIP serves to document what could be a reference flow for open source implementations of POS devices able to read LNURL-withdraw links via NFC, for a better UX in Lightning payments powered by LNURL protocol. *Reference Implementations* There are solutions that already use this common flow or are going to implement it. I'm having calls to push the adoption of this open standard, in particular I've been contacted by Danny Scott (Coincorner), Danny Brewster (Fast Bitcoins), I'm gonna have a call with Kamil Brejcha (Dexfin Exchange) and I'm open to discuss this with anyone who wants to have a call. BTCpay's LNURL NFC Support plugin by Andrew Camilleri <https://github.com/btcpayserver/btcpayserver-plugins> Coincorner's checkout system <https://www.coincorner.com/Checkout> IBEX Mercado's Point of Sale <https://www.ibexmercado.com/> Fast Bitcoins's Point of Sale <https://fastbitcoins.com/> I invite the representatives of the implementations to signal their support to this flow by adding themselves to the table available here: https://github.com/theDavidCoen/LNURL-withdrawPOS and to support this bLIP. *Please note*: before adding your implementation to this list, be sure it is: open source, fully interoperable, respects the LNURL-withdraw specs (LUD03 <https://github.com/fiatjaf/lnurl-rfc/blob/luds/03.md>) *Feel free to reach out* As mentioned above, I'm open to discuss this even via call: simply select a date from my calendar https://calendly.com/thedavidcoen Thanks for your time! David Coen Twitter: https://twitter.com/thedavidcoen Comunicazione e Immagine, di David Coen P.IVA 11368220015 Codice fiscale: CNODVD88C30L219P Sede fiscale: via Luigi Boccherini 37, 10155 Torino cell. 340 4601061 Web Site www.davidcoen.it email: i...@davidcoen.it
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