Restrict referral coupons by product ID

functions.php

<?php

add_filter('automatewoo/referrals/coupon_data', 'my_automatewoo_referrals_coupon_data' );

/**
 * Restrict referral coupon to product IDs
 *
 * @param array $coupon_data
 * @return array
 */
function my_automatewoo_referrals_coupon_data( $coupon_data ) {

	// change coupon type
	$coupon_data['discount_type'] = 'percent_product';	
	
	// to include specific products
	$coupon_data['product_ids'] = array( 101, 102 ); 
	
	return $coupon_data;
}