Re: [webpayments] Should we expose status change events in the browser API? (#41)

> For example, when a shipping address changes, what if the merchant website needs to perform an async request to obtain updated pricing information?

This is actually the exact use case we're trying to support. :) When it's all said and done, I *think* we'll limit the amount of time a merchant has to call the update() method after an event is emitted. Still thinking about that and working out details, though.

Thanks for other comments as well. Need a bit more time to process and think about them. Will circle back.

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https://github.com/w3c/webpayments/issues/41#issuecomment-165493482