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Re: [w3c/webpayments] [Payment Request] Should we allow a "polling" mechanism for websites to not invoke the API if there are no enabled methods (#159)

From: Adrian Hope-Bailie <notifications@github.com>
Date: Mon, 18 Jul 2016 01:47:31 -0700
To: w3c/webpayments <webpayments@noreply.github.com>
Cc: webpayments <public-payments-wg@w3.org>, Comment <comment@noreply.github.com>
Message-ID: <w3c/webpayments/issues/159/233274515@github.com>
@nickjshearer this is a problem we would need to solve. See earlier in the thread for some thoughts. 

> The privacy issue we haven't yet solved is merchants polling the API multiple times with different payment requests to determine what payment methods the user supports. We could conceivably only allow the website to call this once (specifically how this might be done I'm not sure yet)

Smart solutions invited...

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