@ericpp @StevenB @francosolerio @alecksgates I think the biggest challenge with all of this is deciding who is going to store the payment metadata. Apps, Hosting Companies, or Wallet Services? The reason we opted for putting the data in a URL (+ headers for easy parsing) - is that receiving wallets can see the data without knowing anything about this. Whether the data is signed by the app or not - I think having it accessible from just the payment is important.