feat(zetaclient): add /systemtime telemetry endpoint (#3235)

* feat(zetaclient): add /systemtime telemetry endpoint

* fixes

* changelog

changelog.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Features
+
+* [3235](https://github.com/zeta-chain/node/pull/3235) - add /systemtime telemetry endpoint (zetaclient)
+
 ### Tests
 
 * [3205](https://github.com/zeta-chain/node/issues/3205) - move Bitcoin revert address test to advanced group to avoid upgrade test failure

zetaclient/metrics/telemetry.go

@@ -191,6 +191,7 @@ func (t *TelemetryServer) Handlers() http.Handler {
 	router.Handle("/connectedpeers", http.HandlerFunc(t.connectedPeersHandler)).Methods(http.MethodGet)
 	router.Handle("/knownpeers", http.HandlerFunc(t.knownPeersHandler)).Methods(http.MethodGet)
 	router.Handle("/pingrtt", http.HandlerFunc(t.pingRTTHandler)).Methods(http.MethodGet)
+	router.Handle("/systemtime", http.HandlerFunc(systemTimeHandler)).Methods(http.MethodGet)
 	router.Use(logMiddleware())
 
 	return router
@@ -333,6 +334,12 @@ func (t *TelemetryServer) pingRTTHandler(w http.ResponseWriter, _ *http.Request)
 	fmt.Fprintf(w, "%s", string(data))
 }
 
+// systemTimeHandler returns the current system time in seconds
+func systemTimeHandler(w http.ResponseWriter, _ *http.Request) {
+	nowString := time.Now().UTC().Format(time.RFC3339)
+	fmt.Fprintf(w, "%s", nowString)
+}
+
 // logMiddleware logs the incoming HTTP request
 func logMiddleware() mux.MiddlewareFunc {
 	return func(handler http.Handler) http.Handler {