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# NIDiscoveryToken

An object that uniquely identifies a peer that participates in an interaction session.

```
class NIDiscoveryToken
```

## Overview

Use `NIDiscoveryToken` to determine the peer device’s nearby interaction capabilities by examining the [`deviceCapabilities`](/documentation/NearbyInteraction/NIDiscoveryToken/deviceCapabilities) that describes the available capabilities on a person’s device.

## Topics

### Understanding device capabilities

[`var deviceCapabilities: any NIDeviceCapability`](/documentation/NearbyInteraction/NIDiscoveryToken/deviceCapabilities)

A protocol object that describes the nearby interaction capabilities of a person’s device.

### Initializers

[`init?(coder: NSCoder)`](/documentation/NearbyInteraction/NIDiscoveryToken/init(coder:))

## Relationships

### Conforms To

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

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

[`NSCopying`](/documentation/Foundation/NSCopying)

[`NSSecureCoding`](/documentation/Foundation/NSSecureCoding)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

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

[`NSCoding`](/documentation/Foundation/NSCoding)

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

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

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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