Trust questions

Hello, First of all thank you for this excellent extension. I have been testing it but it seems that the extension is based on a iframe. It is strange not asking for APIs from infura for example. We wish we could have the possibility to control the plugin ourselves. 1. Where I can consult the source code? github? and how APIs are used. 2. Where is the documentation explaining the interactions with thirs party services and smart contracts? 3. If the are smart contracts, where consult them in verified and audited mode? 4. What is the difference with the extension you have on codecanyon? Some bugs: In a multisite installation, the extension do not work properly (on a single site), it does not load the page, and neither de credit card iframe payment. Thank you Best regards