WP-Piwik allows to access your Piwik stats within WordPress and to add your Piwik tracking code to your WordPress sites.
So you can use WP-Piwik for e-commerce scenarios, but you have to extend the necessary Piwik calls, e.g., to track your sales.
For WooCommerce there is an additional plugin you can use to do so:
https://wordpress.org/plugins/woocommerce-piwik-integration/
This can also be combined with WP-Piwik.
A WooCommerce integration in WP-Piwik is planned, but I can’t tell you when I’m finished with this. The integration of other e-commerce solutions is not planned yet.
