Re: [w3c/payment-request] Should API support billing address capture (for tax computation)? (#27)

Hi @marcoscaceres,


I may not have understood your proposal fully. However, if the proposal anticipates that the merchant only receives a billing address after the payment handler has been launched, then I think the proposal will be inadequate for use cases where:

 * Payment happens within the payment handler (e.g., form sof push payment)
 * Agreements between the user and their PSP happen within the payment handler and likely depend on the total being accurate (e.g., real-time credit offers).

Ian

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