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/**
 * Coupon Data Store Interface
 *
 * @version 3.0.0
 * @package WooCommerce\Interfaces
 */

/**
 * WC Coupon Data Store Interface
 *
 * Functions that must be defined by coupon store classes.
 *
 * @version  3.0.0
 */
interface WC_Coupon_Data_Store_Interface {
	/**
	 * Increase usage count for current coupon.
	 *
	 * @param WC_Coupon $coupon Coupon object.
	 * @param string    $used_by Either user ID or billing email.
	 */
	public function increase_usage_count( &$coupon, $used_by = '' );

	/**
	 *  Decrease usage count for current coupon.
	 *
	 * @param WC_Coupon $coupon Coupon object.
	 * @param string    $used_by Either user ID or billing email.
	 */
	public function decrease_usage_count( &$coupon, $used_by = '' );

	/**
	 * Get the number of uses for a coupon by user ID.
	 *
	 * @param WC_Coupon $co