Discount rule v2: events document

events_document.php

<?php
/**
 * Get discount of a product
 * @param $product integer|object (Product object Example: wc_get_product($product_id))
 * @param $quantity int
 * @return boolean|float|int - is product has no discounts it returns false
 */
$discount = apply_filters('advanced_woo_discount_rules_get_discount_price', $product, $quantity);
if($discount !== false){
    echo $discount // HERE YOU GET DISCOUNT PRICE
}

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/**
 * Get discount of a product from custom price
 * @param $product integer|object (Product object Example: wc_get_product($product_id))
 * @param $quantity int
 * @param $custom_price int|float
 * @return boolean|float|int - is product has no discounts it returns false
 */
$discount = apply_filters('advanced_woo_discount_rules_get_discount_price', $product, $quantity, $custom_price);
if($discount !== false){
    echo $discount // HERE YOU GET DISCOUNT PRICE
}

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Get discount percentage of a product reffer the following snippet
https://gist.github.com/AnanthFlycart/6becf99a52ee41f4fa65c362df7d301b

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