Re: [w3c/webpayments-payment-apps-api] Thoughts on the current spec (#34)

>> The spec talks about network failures. I think Service Workers are the answer here. 
>> They provide offline capability and caching, if necessary.
> Do you think we need to provide any information (e.g., a transaction identifier) that
> could be used to query the state of a transaction?

The issue here is with push payments where the website gets no response from the app and so has no way of knowing if the payment was completed. I think we need a holistic approach to this including a unique transaction ID set by the browser and possibly a standard query URL that can be used to get the status of a payment using the ID.

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