Field	Type	Nullable	Description
`code`	String	No	The status code of the workflow. This is the primary field for determining the state of the process. • `FINISH`: Indicates that the user has completed the entire workflow. To determine the final success or failure, refer to the `extraInfo` or the `finishRedirectUrl`. • Other values: Indicate that the workflow failed during the initialization or pre-check phase, meaning the user did not enter the core process. Examples include `IAM_FAILED` (Authentication failed) or `SERVICE_BUSY` (Server busy). See the [ Complete Status Code List ] for all possible values.
`finishRedirectUrl`	String	Yes	The redirect URL upon completion. This field is populated only when the `code` is `FINISH`; otherwise, it is `null`. • If the workflow is successful, the value of this field will be the `returnUrl` that you provided when generating the Solution URL. • If the workflow fails (e.g., liveness check failed), the value will be your provided `failedReturnUrl`, appended with `errorCode` and `message` query parameters.
`signatureId`	String	No	The unique identifier for this workflow session. The signatureId is assigned as soon as you call the start method. You can use this ID to query or verify the final status and detailed information of this session via server-side APIs.
`extraInfo`	Map<String, Object>	Yes	A collection of extended information, provided as a map of key-value pairs. Typically provided when `code` is `FINISH` and the workflow has failed, used to return structured error details. It contains `errorCode` and `message` keys, whose values mirror the parameters carried in the `finishRedirectUrl`.
↳ `"errorCode"`	String	Yes	The specific error code. See the [ Complete Status Code List ] for all possible values.
↳ `"message"`	String	Yes	A human-readable description of the error.

Data Redundancy for Error Details

The extraInfo object mirrors the error details found in the finishRedirectUrl. The errorCode and message values are available both as keys within the extraInfo map and as query parameters in the finishRedirectUrl string. Both sources provide the exact same information and can be used interchangeably.