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# AccessoryMessage

A structure that represents a message to send to an accessory.

```
struct AccessoryMessage
```

## Overview

Create accessory messages in your app’s [`AccessoryDataProvider`](/documentation/AccessoryTransportExtension/AccessoryDataProvider) extension and send them using <doc://com.apple.documentation/documentation/AccessoryNotifications/NotificationsForwarding/AccessoryNotificationsSession/send(message:)>. The system encrypts the message before delivering it to the transport extension.

## Topics

### Creating messages

[`init(() -> AccessoryMessage)`](/documentation/AccessoryTransportExtension/AccessoryMessage/init(_:))

Initializes an accessory message using a result builder closure.

[`struct Builder`](/documentation/AccessoryTransportExtension/AccessoryMessage/Builder)

A builder that constructs accessory messages declaratively.

### Accessing message content

[`let payloads: [AccessoryMessage.Payload]`](/documentation/AccessoryTransportExtension/AccessoryMessage/payloads)

An array of payload objects that comprise the message.

[`struct Payload`](/documentation/AccessoryTransportExtension/AccessoryMessage/Payload)

A structure that represents a single data payload within an accessory message.

### Assessing outcomes

[`enum Error`](/documentation/AccessoryTransportExtension/AccessoryMessage/Error)

An enumeration of errors that can occur during message transmission.

[`enum Result`](/documentation/AccessoryTransportExtension/AccessoryMessage/Result)

An enumeration of results for message transmission.

## Relationships

### Conforms To

[`Identifiable`](/documentation/Swift/Identifiable)

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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