[Lightning-dev] W3C Web Payments Working Group / Payment Request API

Sjors Provoost sjors at sprovoost.nl
Mon Sep 10 11:21:40 UTC 2018

I tend to agree it’s just a matter of proposing a Payment Method. However there are various ways to go about it, e.g. what you suggest, but browsers might also get built-in wallets or there might a multi-currency abstraction on top of everything. It’s probably not ideal if we end up with multiple Payment Methods or one that pushes a single approach.

I left a few comments on the working group Github: https://github.com/w3c/webpayments/issues/232 <https://github.com/w3c/webpayments/issues/232>


> Op 30 aug. 2018, om 16:15 heeft Christian Decker <decker.christian at gmail.com> het volgende geschreven:
> Just a quick followup on this: yes, I am indeed a member of the W3C Web
> Payments Working Group, though not a very active one. I am following the
> discussion as best I can, and try to figure out what changes and special
> considerations, if any, are needed for both Bitcoin and Lightning to
> work correctly, when the spec is finalized and deployed.
> As it stands today the spec should be Bitcoin and Lightning compatible,
> with the following considerations:
> - A special Payment Method ID [1] must be assigned to Bitcoin and
>   Lightning since we cannot rely on a centralized URL to act as a
>   payment method for these decentralized networks. Currently only the
>   `basic-card` identifier has been assigned, but we can apply for one
>   eventually;
> - As far as I see a local handler can be specified as Payment Handler
>   [2] allowing us to have a Bitcoin or Lightning daemon running locally
>   that is invoked for payment requests;
> - The Payment Request API [3] even mentions XBT as a supported
>   currency, in addition to ISO4217 codes, so if a vendor publishes a
>   Bitcoin amount and a matching Payment Method, we should be able to
>   perform the payment;
> - Since we require special handling for Bitcoin and Lightning
>   w.r.t. the Payment Method, the Payment Method Manifest [4] doesn't
>   apply to us.
> So all in all, we should be able to get Bitcoin and Lightning working
> with the spec without any major roadblocks. Notice that this is based
> solely on my current understanding of the spec, and I'd love for others
> to chime in and point out anything that I might have missed.
> Cheers,
> Christian
> [1] https://www.w3.org/TR/payment-method-id/
> [2] https://www.w3.org/TR/payment-handler/
> [3] https://www.w3.org/TR/payment-request/
> [4] https://www.w3.org/TR/payment-method-manifest/
> René Pickhardt via Lightning-dev <lightning-dev at lists.linuxfoundation.org> writes:
>> Hey lightning devs,
>> I was wondering if any of the companies here are members of W3C  and if
>> anyone here could be member of the W3C Web Payments Working Group (c.f.:
>> https://www.w3.org/Payments/WG/ )? According to this mail
>> https://lists.linuxfoundation.org/pipermail/lightning-dev/2018-March.txt
>> Christian Decker is a member. Which I think would be awesome!
>> They have just released their candidate recommendation for a payment API
>> at: https://www.w3.org/TR/payment-request/ According to their site the
>> proposed recommendation will be published not earlier than October 31st
>> 2018. They are currently looking for feedback in their github repository
>> at: https://github.com/w3c/payment-request/
>> I can see that they have bitcoin somewhat on their mind. But I guess it
>> would be even cooler if we could make sure that lightning payments will
>> also be compatible with their recommendation.
>> Christian - if you really are a member -  could you give us an update on
>> that work? How relevant is it for us?
>> best Rene
>> --
>> https://www.rene-pickhardt.de
>> Skype: rene.pickhardt
>> mobile: +49 (0)176 5762 3618
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