sendEvent.m

[self sendEventWithName:@"onSessionConnect" body:@{@"sessionId": session.sessionId}];

from where do you call this function? its inaccessible from other implementation or classes...

@PerspectivesLab https://facebook.github.io/react-native/docs/native-modules-ios#sending-events-to-javascript

RCT_EXPORT_METHOD(addEvent:(NSString *)name params:(NSDictionary *)params) {
  NSString *site = [RCTConvert NSString:params[@"site"]];
  [self notificationEvent];
  RCTLogInfo(@"Pretending to create an event %@ at %@", name, site);
}

- (NSArray<NSString *> *)supportedEvents
{
  return @[@"onSessionConnect"];
}

// Will be called when this module's first listener is added.
-(void)startObserving {
  hasListeners = YES;
}

// Will be called when this module's last listener is removed, or on dealloc.
-(void)stopObserving {
  hasListeners = NO;
}

- (void) notificationEvent {
  [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(sendEvent:) name:@"Eezy" object:@"my object"];
  [[NSNotificationCenter defaultCenter]postNotificationName:@"Eezy" object:@"my object" userInfo:@{@"Status": @"Success"}];
}

- (void)sendEvent:(NSNotification *)notification {
  if (hasListeners) {
    RCTLogInfo(@"Event recieved.");
    [self sendEventWithName:@"onSessionConnect" body:@{@"body": notification.name}];
  } else {
    RCTLogInfo(@"Event stoped.");
  }
}