> For the complete documentation index, see [llms.txt](https://guardian.hedera.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guardian.hedera.com/docs/develop/guardian/standard-registry/policies/policy-creation/introduction/action-workflow-block.md). # InterfaceActionBlock ### Properties | Block Property | Definition | Example Input | Status | | ---------------- | --------------------------------------------------------------------------------- | ------------------------------------------------------------------------------ | ------ | | type | A block to create custom actions. | **InterfaceActionBlock** (Can't be changed). | | | tag | Unique name for the logic block. | download\_config\_btn. | | | permissions | Which entity has rights to interact at this part of the workflow. | Installer. | | | defaultActive | Shows whether this block is active at this time and whether it needs to be shown. | Checked or unchecked. | | | stop Propagation | End processing here, don't pass control to the next block. | Checked or unchecked. | | | type | Specific the type of action workflow action block. | Current options are: SELECTOR (select an action) and DOWNLOAD (download files) | | ### UI Properties | UI Property | Definition | Status | | -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------ | | Title | Provides the title. | | | Field | Provides the field name. Action workflow type needs to be SELECTOR. | | | Option Name | Provides the name of the option. Action workflow type needs to be SELECTOR. | | | Option Value | Provides the value of the option. Action workflow type needs to be SELECTOR. | | | UI Class | Button style. Action workflow type needs to be SELECTOR. | | | Button Content | Provide the content for the button. Action workflow type needs to be DOWNLOAD. | | | Schema | Pre-configured schemas relevant for download to be selected from the drop down of available schemas in your Guardian instance. Only needed in the reference implementation of the Guardian because of the IoT Simulator that is generating MRV data. Action workflow type needs to be DOWNLOAD. | | | Target URL | Set the target URL where the file should be stored. Only needed in the reference implementation of the Guardian because of the IoT Simulator that is generating MRV data. Action workflow type needs to be DOWNLOAD. | | | User | Action workflow type needs to be SELECTOR. It determines who will get update actions (Dependencies property in other blocks) and which user will be used in next Blocks. It can be "Current" or "Owner". "Current" - user under which the action is performed. "Owner" - document owner. | | | Option Tag | Name of the dynamic events | | ![](/files/8Col1pFQWF31XV2SsINo) ### Events | Property Name | Name in JSON | Property Value | Value in JSON | Description | | ------------- | ------------ | ----------------------------------------------------------------- | -------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- | | Event Type | - |

Input Event

Output Event

| - | Type of the event - determines whether this is ingress or egress event for the current block. | | Source | "source" | Block tag(string) | "block\_tag" | The block which initiates the event. | | Target | "target" | Block tag(string) | "block\_tag" | The block which receives the event. | | Output Event | "output" | Event name(string) | "event\_name" | Action or issue that caused the event. | | Input Event | "input" | Event name(string) | "event\_name" | Action which will be triggered by the event. | | Event Actor | "actor" |

Event Initiator

Document Owner

Document Issuer

|

""

"owner"

"issuer"

| Allows to transfer control of the block (execution context) to another user. Empty field leaves control at the Event Initiator. | | Disabled | "disabled" | True/False | true/false | Allows to disable the event without deleting it. | To know more information about events, please look at [Events](/docs/develop/guardian/standard-registry/policies/policy-creation/introduction/events.md). ### API Parameters `GET` `/policies/{policyId}/blocks/{uuid}` #### Path Parameters | Name | Type | Description | | ------------------------------------------ | ------ | ----------- | | policyId\* | String | Policy ID | | uuid\* | String | Block UUID | {% tabs %} {% tab title="200: OK Successful Operation" %} ```javascript { "id": "448ff538-1c3b-45eb-a310-9414ae223b81", "blockType": "interfaceActionBlock", "type": "dropdown", "uiMetaData": { "options": [], "content": "VVB" }, "name": "document.credentialSubject.0.field0", "value": "group", "field": "assignedToGroup", "options": [ { "name": "1", "value": "6b3efd88-037c-4335-a4d1-02776e23973c" } ] } ``` {% endtab %} {% endtabs %} `POST` `/policies/{policyId}/blocks/{uuid}` #### Path Parameters | Name | Type | Description | | ------------------------------------------ | ------ | ----------- | | policyId\* | String | Policy ID | | uuid\* | String | Block UUID | #### Request Body | Name | Type | Description | | ------------------------------------------ | ---- | ----------- | | document\* | VC | VC Document | --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://guardian.hedera.com/docs/develop/guardian/standard-registry/policies/policy-creation/introduction/action-workflow-block.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.