how to send href to sever for payment processing using balanced payments in iOS

I am using balanced payments(1.1 version) for payment using credit card.

I have followed sample given at http://ift.tt/1l6REDK

iam able to get href from

[balanced createCardWithNumber:[tfCardNumber text]
               expirationMonth:[[tfExpMonth text] integerValue]
                expirationYear:[[tfExpYear text] integerValue]
                     onSuccess:^(NSDictionary *responseParams) {
                         response = responseParams;
                         [tvResponseView setText:[response description]];
                         NSLog(@"%@", response);

                         [self setActivityIndicatorEnabled:NO];
                         [self setResetButton];
                         tvResponseView.alpha = 0.0;
                         [UIView animateWithDuration:0.5 animations:^{
                             [tvResponseView setHidden:NO];
                             tvResponseView.alpha = 1.0;
                         }];
                     }
                       onError:^(NSError *error) {
                           [tvResponseView setText:[response description]];
                           NSLog(@"%@", [error description]);

                           [self setActivityIndicatorEnabled:NO];
                           [self setResetButton];
                       }
                optionalFields:optionalFields];

I want to know how to send href to server and what is the payment process.

Any help or suggestion to proceed.