From 8181f667e75bceef42b69d9c499eaa55da8e5132 Mon Sep 17 00:00:00 2001
From: ren <18050944+renintw@users.noreply.github.com>
Date: Fri, 24 May 2024 22:44:54 +0900
Subject: [PATCH] Add comment.

---
 public_html/wp-content/plugins/wordcamp-qbo/wordcamp-qbo.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/public_html/wp-content/plugins/wordcamp-qbo/wordcamp-qbo.php b/public_html/wp-content/plugins/wordcamp-qbo/wordcamp-qbo.php
index e568da843..e536229fd 100644
--- a/public_html/wp-content/plugins/wordcamp-qbo/wordcamp-qbo.php
+++ b/public_html/wp-content/plugins/wordcamp-qbo/wordcamp-qbo.php
@@ -493,6 +493,10 @@ protected static function build_qbo_create_invoice_request( int $invoice_id ) {
 		 * for the first time, so we don't need any code to automatically activate them.
 		 */
 		if ( 'USD' != $currency_code ) {
+			/*
+			 * Fetch currency exchange rates from QBO.
+			 * No caching implemented since QBO updates rates every 4 hours and API calls are only triggered on invoice approval.
+			 */
 			$response = wp_remote_get(
 				sprintf(
 					'%s/v3/company/%d/exchangerate?sourcecurrencycode=%s',