How do i block my magento extension to use in a unregistered domain

Question

I am working on magento custom module development and sales. usually i encrypt the extension code and install it on my client's websites so that they cannot re-use the extension in other domains.

Now i am looking for some other method through which i can stop others using my code other than encryption.

I heard about setting up license key to validate user's domain.Can anyone provide me more details or ideas about this.

Thanks in advance!

Answer 1

You could also put in a few callbacks to your domain to validate a key but again as with the encryption it is not really in the spirit of things.

For the callbacks you can hook onto one of the main events like core_block_abstract_to_html_before

Answer 2

There really isn't any way to do this, except encrypting your entire module. But then less people will use it, because who knows what code you've put in there.