Re: [webpayments] Minimum necessary information for merchant to process payment (#27)

> Yes, there should be a base request and response format for the Payment API. The base format should be in the Messaging specification. The base format should be JSON-LD to support a formal extensibility mechanism. The message format should not require special processing by the web developer or browser, and should avoid JSON-LD processing by the PSP and merchant unless some kind of significant data format validation/verification, like signature verification, is being performed.

+1

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https://github.com/w3c/webpayments/issues/27#issuecomment-162598815