Because you filed I-751 by yourself to remove the conditions of the green card, your permanent green card is marriage-based, not based on domestic violence. The domestic violence/abuse just made you be qualified to file the I-751 for waiver of the joint petition (not need your ex-hu*****and to be involved).
If you did not have the conditional green card when you was abused, you would have filed I-360 and I-485 for the green card application, then your permanent green card would have been based on domestic violence.
