[Refer A Friend] Advocate rewards based on their user role and percentage of order

functions.php

<?php

add_filter( 'automatewoo/referrals/reward_amount', 'my_automatewoo_referral_reward_amount', 10, 3 );

/**
 * @param $reward_amount
 * @param AW_Model_Referral_Advocate $advocate
 * @param WC_Order $order
 * @return mixed
 */
function my_automatewoo_referral_reward_amount( $reward_amount, $advocate, $order ) {

	$advocate_user = $advocate->get_user();
	$role = current( $advocate_user->roles );

	if ( $role == 'administrator' ) {
		$reward_percentage = 50;
	}
	else {
		$reward_percentage = 10;
	}

	return $order->get_total() * $reward_percentage / 100;
}

Above is percentage based amount, but is it possible to set the different fixed amount for advokat based on his role which he will earn only when customer reffered to website and purchased.

Because by default automatewoo refer a freind allow to add 1 price for advokat and 1 for person who reffered, we want to keep same settings but want to change retail price for advokat to something else then the mentioned in setting and 0 earning for customer.