chromium/chrome/test/data/android/digital_goods.html

<!DOCTYPE html>
<html>
<title>Digital Goods Test</title>
<script>

// This must be kept in sync with third_party/blink/renderer/modules/payments\
// /goods/dom_window_digital_goods.cc
const PAYMENT_METHOD = "https://play.google.com/billing";

let digitalGoodsService = null;

async function populateDigitalGoodsService() {
    digitalGoodsService = await window.getDigitalGoodsService(PAYMENT_METHOD);
}

let itemDetails = null;

async function populateItemDetails(ids) {
    itemDetails = await digitalGoodsService.getDetails(ids);
}

let consumeFlag = null;
let consumeError = null;

async function callConsume(id) {
    try {
        await digitalGoodsService.consume(id);
        consumeFlag = "done";
    } catch (error) {
        consumeError = error;
    }
}

</script>
<body>
</body>
</html>