rsolomakhin commented on this pull request.
> + <h2>
+ Aborting an invocation
+ </h2>
+ <p>
+ If the <a>payee</a> uses [[!payment-request]] method <a>abort()</a>, the
+ <a>user agent</a> fires <a>AbortPaymentEvent</a> in the <a>payment
+ handler</a> that is currently handling <a>PaymentRequestEvent</a>.
+ There is no expectation that the <a>payment handler</a> would roll back
+ a transaction or issue a refund. (This is out of scope.) The <a>payment
+ handler</a> should respond with a boolean that indicates whether the
+ abort was successful.
+ </p>
+ <p>
+ Implementations may impose a timeout for developers to respond to the
+ <a>AbortPaymentEvent</a>. If the timeout expires, then the
+ implementation will behave as if <dfn>respondWith()</dfn> was called
Done.
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