# Lambdas
<a name="API_Lambdas"></a>

Configuration for AWS Lambda functions used in a Region switch plan.

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

 ** arn **   <a name="regionswitch-Type-Lambdas-arn"></a>
The Amazon Resource Name (ARN) of the Lambda function.  
Type: String  
Required: No

 ** crossAccountRole **   <a name="regionswitch-Type-Lambdas-crossAccountRole"></a>
The cross account role for the configuration.  
Type: String  
Pattern: `arn:aws[a-zA-Z0-9-]*:iam::[0-9]{12}:role/.+`   
Required: No

 ** externalId **   <a name="regionswitch-Type-Lambdas-externalId"></a>
The external ID (secret key) for the configuration.  
Type: String  
Required: No

## See Also
<a name="API_Lambdas_SeeAlso"></a>

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/arc-region-switch-2022-07-26/Lambdas) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/arc-region-switch-2022-07-26/Lambdas) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/arc-region-switch-2022-07-26/Lambdas)