Deep Linking on Facebook 3.js

Branch *branch = [Branch getInstance];
[branch initSessionWithLaunchOptions:launchOptions andRegisterDeepLinkHandler:^(NSDictionary *params, NSError *error) {
   if (!error) {
       // params are the deep linked params associated with the link that the user clicked -> was re-directed to this app
       // params will be empty if no data found
       // ... insert custom logic here ...
       NSLog(@"params: %@", params.description)
   }
}];