f10/sdk/fidl/fuchsia.castconfig/README.md

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# fuchsia.castconfig

<div class="fidl-version-div"><span class="fidl-attribute fidl-version">Added: 7</span></div>


## **PROTOCOLS**

## Provider {#Provider}
*Defined in [fuchsia.castconfig/cast_config.fidl](https://cs.opensource.google/fuchsia/fuchsia/+/main:sdk/fidl/fuchsia.castconfig/cast_config.fidl;l=19)*
<p>Interface that provides cast config data.</p>


### Notify {#Provider.Notify}

<p>Notifies the config provider of the config status.</p>
<p><code>processed</code>: <code>true</code> if successfully received and processed
<code>retry</code>: If <code>processed</code> is <code>false</code> config provider determines if a retry
is appropriate.</p>



#### Request {#Provider.Notify_Request}

<table>
    <tr><th>Name</th><th>Type</th></tr>
        <tr>
            <td><code>processed</code></td>
            <td>
                <code>bool</code>
            </td>
        </tr>
</table>


#### Response {#Provider.Notify_Response}

<table>
    <tr><th>Name</th><th>Type</th></tr>
        <tr>
            <td><code>retry</code></td>
            <td>
                <code>bool</code>
            </td>
        </tr>
</table>

### Watch {#Provider.Watch}

<p>Requests a buffer containing cast config data.
This call implements the Hanging Get protocol as detailed in
https://fuchsia.dev/fuchsia-src/concepts/api/fidl#hanging-get</p>
<p>All error cases are terminal, clients should not retry on error.</p>



#### Request {#Provider.Watch_Request}

&lt;EMPTY&gt;


#### Response {#Provider.Watch_Response}

<table>
    <tr><th>Name</th><th>Type</th></tr>
        <tr>
            <td><code>result</code></td>
            <td>
                <code><a class='link' href='#Provider_Watch_Result'>Provider_Watch_Result</a></code>
            </td>
        </tr>
</table>


## **STRUCTS**

### Provider_Watch_Response [resource](/fuchsia-src/reference/fidl/language/language.md#value-vs-resource){:.fidl-attribute} {#Provider_Watch_Response data-text="Provider_Watch_Response"}
*Defined in [fuchsia.castconfig/cast_config.fidl](https://cs.opensource.google/fuchsia/fuchsia/+/main:sdk/fidl/fuchsia.castconfig/cast_config.fidl;l=25)*

<table>
    <tr><th>Field</th><th>Type</th><th>Description</th><th>Default</th></tr>
        <tr id="Provider_Watch_Response.config">
            <td><code>config</code></td>
            <td>
                <code><a class='link' href='../fuchsia.mem/'>fuchsia.mem</a>/<a class='link' href='../fuchsia.mem/#Buffer'>Buffer</a></code>
            </td>
            <td></td>
            <td>No default</td>
        </tr>
</table>


## **ENUMS**

### ErrorCode [strict](/fuchsia-src/reference/fidl/language/language.md#strict-vs-flexible){:.fidl-attribute} {#ErrorCode data-text="ErrorCode"}
Type: <code>uint32</code>

*Defined in [fuchsia.castconfig/cast_config.fidl](https://cs.opensource.google/fuchsia/fuchsia/+/main:sdk/fidl/fuchsia.castconfig/cast_config.fidl;l=10)*
<p>Error codes for the Watch operation.</p>

<table>
    <tr><th>Name</th><th>Value</th><th>Description</th></tr>
        <tr id="ErrorCode.NO_CAST_CONFIG">
<td><h3 id="ErrorCode.NO_CAST_CONFIG" class="add-link hide-from-toc">NO_CAST_CONFIG</h3></td>
            <td><code>1</code></td>
            <td><p>Error when there is no cast config available.</p>
</td>
        </tr>
        <tr id="ErrorCode.INTERNAL">
<td><h3 id="ErrorCode.INTERNAL" class="add-link hide-from-toc">INTERNAL</h3></td>
            <td><code>2</code></td>
            <td><p>Generic error.</p>
</td>
        </tr>
</table>



## **UNIONS**

### Provider_Watch_Result [strict](/fuchsia-src/reference/fidl/language/language.md#strict-vs-flexible){:.fidl-attribute} [resource](/fuchsia-src/reference/fidl/language/language.md#value-vs-resource){:.fidl-attribute} {#Provider_Watch_Result data-text="Provider_Watch_Result"}
*Defined in [fuchsia.castconfig/cast_config.fidl](https://cs.opensource.google/fuchsia/fuchsia/+/main:sdk/fidl/fuchsia.castconfig/cast_config.fidl;l=25)*
<table>
    <tr><th>Ordinal</th><th>Variant</th><th>Type</th><th>Description</th></tr>
        <tr id="Provider_Watch_Result.response">
<td><h3 id="Provider_Watch_Result.response" class="add-link hide-from-toc">1</h3></td>
            <td><code>response</code></td>
            <td>
                <code><a class='link' href='#Provider_Watch_Response'>Provider_Watch_Response</a></code>
            </td>
            <td></td>
        </tr>
        <tr id="Provider_Watch_Result.err">
<td><h3 id="Provider_Watch_Result.err" class="add-link hide-from-toc">2</h3></td>
            <td><code>err</code></td>
            <td>
                <code><a class='link' href='#ErrorCode'>ErrorCode</a></code>
            </td>
            <td></td>
        </tr>
</table>