# CallbackDetails
<a name="API_CallbackDetails"></a>

Contains details about a callback operation in a durable execution, including the callback token and timeout configuration.

## Contents
<a name="API_CallbackDetails_Contents"></a>

 ** CallbackId **   <a name="lambda-Type-CallbackDetails-CallbackId"></a>
The callback ID. Callback IDs are generated by the `DurableContext` when a durable function calls `ctx.waitForCallback`.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
Pattern: `[A-Za-z0-9+/]+={0,2}`   
Required: No

 ** Error **   <a name="lambda-Type-CallbackDetails-Error"></a>
An error object that contains details about the failure.  
Type: [ErrorObject](API_ErrorObject.md) object  
Required: No

 ** Result **   <a name="lambda-Type-CallbackDetails-Result"></a>
The response payload from the callback operation as a string.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 6291456.  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/lambda-2015-03-31/CallbackDetails) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/lambda-2015-03-31/CallbackDetails) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/lambda-2015-03-31/CallbackDetails)