> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crossmint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# DelegatedSigner.Passkey

> Kotlin Data Class

**Data Class**

```kotlin theme={null}
data class Passkey(val id: String, val name: String, val publicKeyX: String, val publicKeyY: String, val expiresAt: Long? = null) : DelegatedSigner
```

## Constructors

```kotlin theme={null}
constructor(id: String, name: String, publicKeyX: String, publicKeyY: String, expiresAt: Long? = null)
```

## Properties

| Property     | Type     | Description                                                                                                            |
| ------------ | -------- | ---------------------------------------------------------------------------------------------------------------------- |
| `expiresAt`  | `Long?`  | Optional expiration timestamp in milliseconds since Unix epoch. If set, the delegated signer will expire at this time. |
| `id`         | `String` | -                                                                                                                      |
| `name`       | `String` | -                                                                                                                      |
| `publicKeyX` | `String` | -                                                                                                                      |
| `publicKeyY` | `String` | -                                                                                                                      |