extpay/sample-extension-mv2/background.js

The JavaScript library for https://extensionpay.com - payments for browser extensions, no server needed.

// To test payments, replace 'sample-extension' with the ID of
// the extension you registered on ExtensionPay.com. You may
// need to uninstall and reinstall the extension.
// And don't forget to change the ID in popup.js too!
var extpay = ExtPay('sample-extension');
extpay.startBackground(); // this line is required to use ExtPay in the rest of your extension

extpay.getUser().then(user => {
	console.log(user)
})