# signmessage - Dogecoin {disallowed}

This method signs a message with the private key of an address.

{% hint style="info" %}

* Requires the private key for the address to be in the wallet.
* May not work on shared nodes if wallet access is restricted.
* Use `verifymessage` to verify signatures.
  {% endhint %}

## Parameters

| Parameter | Type   | Required | Description                        |
| --------- | ------ | -------- | ---------------------------------- |
| address   | string | Yes      | The Dogecoin address to sign with. |
| message   | string | Yes      | The message to sign.               |

## Request

{% tabs %}
{% tab title="cURL" %}
{% code overflow="wrap" %}

```bash
curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "signmessage",
    "params": ["DLGbK6mCjBT67r8wjJqCg8hkFiBYV5JquH", "Hello, Dogecoin!"],
    "id": "getblock.io"
}'
```

{% endcode %}
{% endtab %}

{% tab title="Axios" %}
{% code overflow="wrap" %}

```javascript
import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "signmessage",
    "params": ["DLGbK6mCjBT67r8wjJqCg8hkFiBYV5JquH", "Hello, Dogecoin!"],
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data)))
    .catch(error => console.log(error));
```

{% endcode %}
{% endtab %}

{% tab title="Request" %}
{% code overflow="wrap" %}

```python
import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "signmessage",
    "params": ["DLGbK6mCjBT67r8wjJqCg8hkFiBYV5JquH", "Hello, Dogecoin!"],
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)
```

{% endcode %}
{% endtab %}

{% tab title="Rust" %}
{% code overflow="wrap" %}

```rust
use reqwest::header;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::new();
    
    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header(header::CONTENT_TYPE, "application/json")
        .body(r#"{
            "jsonrpc": "2.0",
            "method": "signmessage",
    "params": ["DLGbK6mCjBT67r8wjJqCg8hkFiBYV5JquH", "Hello, Dogecoin!"],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

## Response

{% code title="Response (JSON)" %}

```json
{
    "result": "H1b2c3d4e5f6g7h8i9j0...",
    "error": null,
    "id": "getblock.io"
}
```

{% endcode %}

## Response Parameters

| Field  | Type   | Description                      |
| ------ | ------ | -------------------------------- |
| result | string | The base64-encoded signature.    |
| error  | null   | Error object (null if no error). |
| id     | string | Request identifier.              |

## Use Case

The `signmessage` method is essential for:

* Proving address ownership
* Authentication systems
* Cryptographic verification
* Digital signatures
* Identity verification

## Error Handling

| Error Code | Message                   | Cause                            |
| ---------- | ------------------------- | -------------------------------- |
| -3         | Invalid address           | Invalid Dogecoin address.        |
| -4         | Private key not available | Address not in wallet.           |
| 403        | Forbidden                 | Missing or invalid ACCESS-TOKEN. |