Edit the config block inside this HTML file, especially
paywayRequestToken,
merchantIdentifier,
serviceLocation,
transactionSourceId, and the display amount.
This page assumes your server already queued the payment with PaywayWS and returned a
paywayRequestToken. The token below is the only Payway token that should be exposed in the browser.
The page must be hosted on the same HTTPS domain registered with Apple/Payway, and Apple Pay testing must be done in Safari.