Charge a custom fee based on a users WordPress role when making a transfer in myCRED.

mycred-pt-get-fee-filter-example1

/**
 * Custom transfer Fees
 * Charge a custom fee based on a users WordPress role when making
 * a transfer in myCRED.
 * @version 1.0
 */
function mycred_pro_transfer_fee_by_role( $fee, $amount, $user_id, $point_type, $prefs ) {

	// if we are just a subscriber, impose 10% fee
	if ( ! user_can( $user_id, 'publish_posts' ) )
		$fee = $amount * 0.1;

	// else if we are an "contributor", impose 5% fee
	elseif ( ! user_can( $user_id, 'delete_published_posts' ) )
		$fee = $amount * 0.05;

	// everyone else pays no fee
	else $fee = 0;

	return $fee;

}
add_filter( 'mycred_pt_get_fee', 'mycred_pro_transfer_fee_by_role', 10, 5 );