Building an auction module: extending the validation class

Hi there,

I’m currently programming an auction module for ExpressionEngine based on this tutorial: http://ee-recipes.com/articles/details/our-first-module-part-6-processing-the-form-results

Got the core functionality working, but now I’d like to validate my form submission. The validation class is working fine with its standard methods, but the callbacks are not working from my mod.auction.php.

The bids are placed through a registered action. What’s the best way to extend the validation class? Should I make my own validation library in /third_party/auction/libraries? Can’t find a lot on it, some help would be nice 😊

Thanks in advance!