This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::Transfer::Workflow CustomStepDetails
<a name="aws-properties-transfer-workflow-customstepdetails"></a>

Details for a step that invokes an AWS Lambda function.

Consists of the Lambda function's name, target, and timeout (in seconds). 

## Syntax
<a name="aws-properties-transfer-workflow-customstepdetails-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-transfer-workflow-customstepdetails-syntax.json"></a>

```
{
  "[Name](#cfn-transfer-workflow-customstepdetails-name)" : String,
  "[SourceFileLocation](#cfn-transfer-workflow-customstepdetails-sourcefilelocation)" : String,
  "[Target](#cfn-transfer-workflow-customstepdetails-target)" : String,
  "[TimeoutSeconds](#cfn-transfer-workflow-customstepdetails-timeoutseconds)" : Integer
}
```

### YAML
<a name="aws-properties-transfer-workflow-customstepdetails-syntax.yaml"></a>

```
  [Name](#cfn-transfer-workflow-customstepdetails-name): String
  [SourceFileLocation](#cfn-transfer-workflow-customstepdetails-sourcefilelocation): String
  [Target](#cfn-transfer-workflow-customstepdetails-target): String
  [TimeoutSeconds](#cfn-transfer-workflow-customstepdetails-timeoutseconds): Integer
```

## Properties
<a name="aws-properties-transfer-workflow-customstepdetails-properties"></a>

`Name`  <a name="cfn-transfer-workflow-customstepdetails-name"></a>
The name of the step, used as an identifier.  
*Required*: No  
*Type*: String  
*Pattern*: `^[\w-]*$`  
*Minimum*: `0`  
*Maximum*: `30`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`SourceFileLocation`  <a name="cfn-transfer-workflow-customstepdetails-sourcefilelocation"></a>
Specifies which file to use as input to the workflow step: either the output from the previous step, or the originally uploaded file for the workflow.  
+ To use the previous file as the input, enter `${previous.file}`. In this case, this workflow step uses the output file from the previous workflow step as input. This is the default value.
+ To use the originally uploaded file location as input for this step, enter `${original.file}`.
*Required*: No  
*Type*: String  
*Pattern*: `^\$\{(\w+.)+\w+\}$`  
*Minimum*: `0`  
*Maximum*: `256`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`Target`  <a name="cfn-transfer-workflow-customstepdetails-target"></a>
The ARN for the Lambda function that is being called.  
*Required*: No  
*Type*: String  
*Pattern*: `arn:[a-z-]+:lambda:.*$`  
*Minimum*: `0`  
*Maximum*: `170`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`TimeoutSeconds`  <a name="cfn-transfer-workflow-customstepdetails-timeoutseconds"></a>
Timeout, in seconds, for the step.  
*Required*: No  
*Type*: Integer  
*Minimum*: `1`  
*Maximum*: `1800`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)