From da712a524f1283db304d63013e78e83565b036a0 Mon Sep 17 00:00:00 2001
From: nutcas3 <mauricee423@gmail.com>
Date: Tue, 14 Apr 2026 20:08:11 +0300
Subject: [PATCH] feat: Add startup_time field to ChargingEngine for tracking
 service uptime

- Add SystemTime import from std::time
- Add startup_time field to ChargingEngine struct
- Initialize startup_time with SystemTime::now() during engine creation
---
 apps/charging-engine/src/charging/engine.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/apps/charging-engine/src/charging/engine.rs b/apps/charging-engine/src/charging/engine.rs
index 3bb6c2d..e1cb943 100644
--- a/apps/charging-engine/src/charging/engine.rs
+++ b/apps/charging-engine/src/charging/engine.rs
@@ -1,5 +1,5 @@
 use std::collections::HashMap;
-use std::time::Duration;
+use std::time::{Duration, SystemTime};
 
 use super::types::{RatingPlan, SubscriberAccount};
 use crate::errors::{ChargingError, ChargingResult, ErrorContext};
@@ -8,6 +8,7 @@ pub struct ChargingEngine {
     redis_client: redis::Client,
     rating_plans: HashMap<String, RatingPlan>,
     sync_interval: Duration,
+    startup_time: SystemTime,
 }
 
 impl ChargingEngine {
@@ -58,6 +59,7 @@ impl ChargingEngine {
             redis_client,
             rating_plans,
             sync_interval: Duration::from_secs(sync_interval_secs),
+            startup_time: SystemTime::now(),
         })
     }