Comment by brendan_j_ryan

Hey! [0]

Am the primary author of the core spec, alongside many others at Tempo and Stripe [0].

As is customary with the IETF draft process, this is our first submission and we expect that we will continue to iterate with the broader community -- including yourself if you are interested in contributing [1]

Thanks for feedback on those two points.

Re: Refunds: This is a payment method specific implementation detail. e.g. this looks very different on cards vs. bank accounts vs. stablecoins. We will provide stronger guidance here to remove ambiguity in the spec

Re: 403: This provision comes from the ability to have _multiple_ Authentication headers, which we view as a necessity for real-world utilization and also compatibility with the Authentication scheme. Similar to the above, we will provide stronger guidance for servers which may support a plurality of authentication schemes and need to handle this edge case.

[0] Had to create a new account since it turns out many years ago I never set an email on my HN profile...

[1] https://github.com/tempoxyz/mpp-specs