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<!DOCTYPE html>
<html>
<head>
<title>Payment Request Testing</title>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
<meta content="utf-8" http-equiv="encoding">
</head>
<body>
<h1>blank page.html</h1>
<script type="text/javascript">
if(window.parent) {
window.parent.postMessage("successful", '*');
}
</script>
</body>
</html>