Okay. So I figured the error in #18. I am using a custom payment pane and tha...

Okay. So I figured the error in #18. I am using a custom payment pane and that is why it is unable to get the provided email id.

Re: #19 I noticed that $owner is the current order's user. I am trying to do anonymous checkout, and in that case it is empty.

There might be a better way to get the email provided during checkout, that would be independent of the payment pane.