Fix(settings): crash when enabling history archive and disabling logs

fixes #14643
(see more details in the ticket)

src/app_service/service/node_configuration/service.nim

@@ -72,6 +72,8 @@ proc init*(self: Service) =
     return
 
 proc saveConfiguration(self: Service, configuration: NodeConfigDto): bool =
+  # FIXME: this method should be removed and the configuration should be updated in the status-go
+  #  (see SetLogLevel, #14643)
   if(not self.settingsService.saveNodeConfiguration(configuration.toJsonNode())):
     error "error saving node configuration "
     return false
@@ -205,14 +207,16 @@ proc isDebugEnabled*(self: Service): bool =
   return logLevel in DEBUG_LOG_LEVELS
 
 proc setLogLevel*(self: Service, logLevel: LogLevel): bool =
-  var newConfiguration = self.configuration
-  newConfiguration.LogLevel = $logLevel
-  if self.saveConfiguration(newConfiguration):
-    self.events.emit(SIGNAL_NODE_LOG_LEVEL_UPDATE, NodeLogLevelUpdatedArgs(logLevel: logLevel))
-    return true
-  else:
+  let response = status_node_config.setLogLevel(logLevel)
+
+  if not response.error.isNil:
+    error "failed to set log level: ", errDescription = response.error.message
     return false
 
+  self.configuration.LogLevel = $logLevel
+  self.events.emit(SIGNAL_NODE_LOG_LEVEL_UPDATE, NodeLogLevelUpdatedArgs(logLevel: logLevel))
+  return true
+
 proc getNimbusProxyConfig(self: Service): bool =
   return self.configuration.NimbusProxyConfig.Enabled
 

src/backend/node_config.nim

@@ -41,3 +41,13 @@ proc disableCommunityHistoryArchiveSupport*(): RpcResponse[JsonNode] =
   except RpcException as e:
     error "error doing rpc request", methodName = "disableCommunityHistoryArchiveProtocol", exception=e.msg
     raise newException(RpcException, e.msg)
+
+proc  setLogLevel*(logLevel: LogLevel): RpcResponse[JsonNode] =
+  try:
+    let payload = %*[{
+      "logLevel": $logLevel
+    }]
+    result = core.callPrivateRPC("setLogLevel".prefix, payload)
+  except RpcException as e:
+    error "error doing rpc request", methodName = "setLogLevel", exception=e.msg
+    raise newException(RpcException, e.msg)