I am hoping for some help.

I am looking for a mechanism to regulate plugin sales. I would like to build on this mechanism to work for me.

I just don't want to reinvent the wheel and am hoping there is some foundation somewhere I can build on.

Here is what I what i would like to do:

Have something in place where I can verify purchase with a license key.
Limit URLs to be installed on.
Turn off if refunded.

Any ideas?

I already use DAP.
Would DLGuard do it?
aMemeber?

Another script to integrate with my WP site (OptimizePress) to help regulate this?

Any ideas or help is greatly appreciated.



Greg