gp-nested-forms-delay-child-notifications-for-parent-payment.php

<?php
/**
 * Gravity Perks // Nested Forms // Delay Child Notifications for Parent Payment
 * http://gravitywiz.com/documentation/gravity-forms-nested-forms/
 */
add_filter( 'gpnf_should_send_notification', function( $should_send_notification, $notification, $context, $parent_form, $nested_form_field, $entry, $child_form ) {

	if( $context == 'parent' ) {
		$parent_entry = GFAPI::get_entry( rgar( $entry, 'gpnf_entry_parent' ) );
		$should_send_notification = in_array( rgar( $parent_entry, 'payment_status' ), array( 'Paid', 'Active' ) );
	}

	return $should_send_notification;
}, 10, 7 );

add_action( 'gform_post_payment_completed', function( $entry ) {
	if( is_callable( 'gpnf_notification_processing' ) ) {
		gpnf_notification_processing()->maybe_send_child_notifications( $entry, GFAPI::get_form( $entry['form_id'] ) );
	}
} );