[BraintreeSDK] ERROR Invalid client token. Please ensure your server is generating a valid Braintree ClientToken.

[firepmi]

General information

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Issue description

[firepmi]

I deployed php braintree on heroku I tried to get client token on the server but it says "[BraintreeSDK] ERROR Invalid client token. Please ensure your server is generating a valid Braintree ClientToken. [BraintreeSDK] ERROR BTClient could not initialize because the provided clientToken was invalid" here is my code

• iOS code [[[NSURLSession sharedSession] dataTaskWithURL:[NSURL URLWithString:@"http://[myapp].herokuapp.com/client_token.php"] completionHandler:^(NSData _Nullable data, NSURLResponse _Nullable response, NSError * _Nullable error) {

                                   NSString *clientToken = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
  
                                   NSLog(@"Client Token: %@",clientToken);
  
                                   self.braintreeClient = [[BTAPIClient alloc] initWithAuthorization:clientToken];
                                   [self tappedMyPayButton];
                                   //[self showDropIn:clientToken];
                                   paynow = true;
  
                               }] resume];

• php heroku <?php require_once("../includes/braintree_init.php"); ?> <?php echo(Braintree\ClientToken::generate()); ?>

Please give me advise Thanks

[bluk]

When you log the client token, is there a value for the client token? Can the text response be base64 decoded? For iOS specifically, I would ensure that you're using a https URL since iOS 9+ requires additional App Transport Security configuration when talking to http URLs. I think Heroku serves all deployed apps over https for free if you use a Heroku subdomain, and it meet the App Transport Security requirements.

Sorry for the delay in response. You can contact support for specific integration information as well.

[bluk]

Closing due to inactivity. If this is still an issue, please leave a comment or contact (Braintree Support](https://developers.braintreepayments.com/forms/contact), and we'll reopen. Thanks!

[juliorimo]

Hi, we are getting the same error creating a BTAPIClient with the clientToken.

[BraintreeSDK] ERROR BTClient could not initialize because the provided clientToken was invalid [BraintreeSDK] ERROR Invalid client token. Please ensure your server is generating a valid Braintree ClientToken.

We are using: Braintree (4.17.0) and BraintreeDropIn (6.4.0)

Thx!