Payment Handler is the @w3payments spec that enables a Web site to become a payment provider for third parties w3c.github.io/payment-handle…
KΞNNETH @kennethrohde
7 Feb 2018
I just made my first "fake" payment using BobPay, an example Web Payment Handler!
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This allows a merchant using the Payment Request API to offer Web apps among the accepted payment instruments. (along eg. credit cards & native apps). If the user picks that instrument, a Service Worker from the said Web app gets spawned and is used to process the payment.
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As reported previously, adoption of payment handler is one of the focus of the @w3payments group in 2018
W3C Developers (@w3cdevs@w3c.social) @w3cdevs
25 Jan 2018
Replying to @w3cdevs
Beyond this, the 2018 roadmap includes pushing further experimentation with another major work item of the group: Payment Handler w3.org/TR/payment-handler/. That API enables innovation in online payments by facilitating integration of Web sites as payment providers.

Feb 8, 2018 · 3:59 PM UTC

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Yesterday, an intent to ship the Payment Handler API in Blink was posted lists.w3.org/Archives/Public… - so hopefully you'll get to test that API in @ChromiumDev soon!