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4 Integration Method
To integrate with Google Pay, you will use the PaywayWS RESTful web service. The acquisition and processing of Google Pay data will be done on the web browser via a JavaScript. We will provide you with a sample JavaScript that can be plugged into your payment page. This script presents the Google Pay button on your page and sends Google Pay data to PaywayWS. We take care of all cryptography and certifications with Google Pay.
Details on the JavaScript can be found in Section XI, Code Details.