How to read sprites/textures from an Animator current animation?

Hi guys, some background here, a couple of weeks ago I was testing some shader for blending sprite animations inbetween them, and the effect I think it looks good and could be useful for someone, I was planning to release it for free on the asset store but if I'm going to do it I want to do it right.

On my tests I was using a for loop to read all the sprites directly from my Resources folder, but I think that's pretty ugly and I was trying to figure out how to read the sprites or textures of the current animation that is currently playing on an Animator

Thank you