> ## 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.

# SignerType.ExternalWallet

> Kotlin Data Class

**Data Class**

```kotlin theme={null}
data class ExternalWallet(val address: String, val onSign: suspend (String) -> String? = null) : SignerType
```

## Constructors

```kotlin theme={null}
constructor(address: String, onSign: suspend (String) -> String? = null)
```

## Properties

| Property | Type | Description |
| - | - | - |
| `address` | `String` | - |
| `onSign` | `suspend (String) -> String?` | - |