WooCommerce Check if order is paid/processing or completed - php

Question

Im trying to set a value "paid" in my custom table when the payment was successful / the customer gets redirectd to the thankyou page.
Im not sure if its secure enough to insert "paid => 1" just when the buyer reached the thankyou page. Thats why i wanted to check if the order was really paid, completed or processing.
Now i figured some payment methods are slow? When i checkout with Klarna my method works and it inserts paid = 1, but when I choose Paypal my Method will die and return: "WASNT PAID". But when I refresh the thankyou-page like 30 secs later it works. So i came to the conclusion that the order_status isnt set fast enough? Is there a cleaner way than mine?
add_action('woocommerce_thankyou', 'ceb_order_complete', 10, 1);
function ceb_order_complete( $order_id ) {
if ( ! $order_id )
return;
// Getting an instance of the order object
$order = wc_get_order( $order_id );
if($order->is_paid() || $order->has_status('processing') || $order->has_status('completed')) {
global $wpdb;
$payID = WC()->session->get( 'payID' );
if(!empty($payID)) {
if(!$wpdb->update($wpdb->prefix."ceb_registrations", array("paid"=>1), array("payID"=>$payID))) {
die("ERROR IN PAYMENT COMPLETE");
}
}
} else {
die("WASNT PAID");
}
}

Answer 1

"woocommerce_thankyou" hook will run each time you see/refresh thankyou page.
The most suitable way is to process data after payment received. For that you can use "woocommerce_payment_complete".
add_action('woocommerce_payment_complete', 'payment_complete_callback');
function payment_complete_callback($order_id)
{
$order = wc_get_order($order_id);
$user = $order->get_user();
// do what ever you want to do using $order object of the WC_Order class providing many functions
}