> For the complete documentation index, see [llms.txt](https://docs.getblock.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.getblock.io/api-reference/arbitrum-arb/arbitrum_eth_sign.md).

# eth\_sign- Arbitrum

Example code for the eth\_sign JSON RPC method. Сomplete guide on how to use eth\_sign JSON RPC in GetBlock Web3 documentation.

This method signs an arbitrary message using the private key of the given address.\
The message is prefixed following the Ethereum signed message standard before hashing and signing.

{% hint style="info" %}
This method requires the account to be **unlocked** on the node or handled by a wallet provider such as MetaMask.
{% endhint %}

#### Parameters

| Field   | Type   | Description                                                                          |
| ------- | ------ | ------------------------------------------------------------------------------------ |
| address | string | The account address that signs the message. Must be unlocked or handled by a wallet. |
| message | string | The raw message to sign (hex encoded or UTF-8 encoded).                              |

#### Request

{% tabs %}
{% tab title="cURL" %}

```bash
curl --location 'https://shared.us-east-1.getblock.io/<ACCESS_TOKEN>' \
--header 'Content-Type: application/json' \
--data '{
   "jsonrpc": "2.0",
    "method": "eth_sign",
  "params": [
    "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "0x48656c6c6f20576f726c64"
  ],
    "id": "getblock.io"
}'
```

{% endtab %}

{% tab title="Axios" %}

```javascript
import axios from 'axios'
let data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "eth_sign",
  "params": [
    "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "0x48656c6c6f20576f726c64"
  ],
    "id": "getblock.io"
};

let config = {
  method: "post",
  maxBodyLength: Infinity,
  url: "https://shared.us-east-1.getblock.io/<ACCESS_TOKEN>",
  headers: {
    "Content-Type": "application/json",
  },
  data: data,
};

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

```

{% endtab %}

{% tab title="Request" %}

```python
import requests
import json

url = "https://shared.us-east-1.getblock.io/<ACESS_TOKEN>"

payload = json.dumps({
   "jsonrpc": "2.0",
    "method": "eth_sign",
  "params": [
    "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "0x48656c6c6f20576f726c64"
  ],   
    "id": "getblock.io"
})
headers = {
  'Content-Type': 'application/json'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

```

{% endtab %}

{% tab title="Rust" %}

```rs
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::builder()
        .build()?;

    let mut headers = reqwest::header::HeaderMap::new();
    headers.insert("Content-Type", "application/json".parse()?);

    let data = r#"{
   "jsonrpc": "2.0",
    "method": "eth_sign",
  "params": [
    "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "0x48656c6c6f20576f726c64"
  ],
    "id": "getblock.io"
}"#;

    let json: serde_json::Value = serde_json::from_str(&data)?;

    let request = client.request(reqwest::Method::POST, "https://shared.us-east-1.getblock.io/<ACCESS_TOKEN>")
        .headers(headers)
        .json(&json);

    let response = request.send().await?;
    let body = response.text().await?;

    println!("{}", body);

    Ok(())
}
```

{% endtab %}
{% endtabs %}

#### Response

```java
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
  "result": "0xbdfdd41c9ad20871e3ec6e9e...c73f338fd1b1c7784cf9c"
}
```

#### Reponse Parameter Definition

| Field  | Description                                                     | Data Type |
| ------ | --------------------------------------------------------------- | --------- |
| result | The hash of the submitted transaction, as a hexadecimal string. | String    |

#### Use case

The `eth_sign` method helps developers to:

* Verify a user identity without sending a transaction
* Implement login flows for dApps (Sign-in with Ethereum style)
* Generate signatures for permit, authentication, and meta transactions
* Build trustless systems where only message signatures (not transactions) are needed

#### Error handling

| Status Code | Error Message   | Cause                                                                                                         |
| ----------- | --------------- | ------------------------------------------------------------------------------------------------------------- |
| 403         | Forbidden       | Missing or invalid ACCESS\_TOKEN.                                                                             |
| -3200       | Unknown account | <ul><li>Invalid account address</li><li>user rejected request</li><li>message must be hex or string</li></ul> |

#### Integration with Web3

The `eth_sign` method enables developers to:

* Implement secure message signing with intuitive UX
* Build login or authorization flows for any dApp
* Create contract interactions that rely on signed messages
* Validate signed payloads on servers or smart contracts
* Use MetaMask or WalletConnect to sign and broadcast actions securely

{% tabs %}
{% tab title="Ethers.js" %}

```javascript
import { ethers } from "ethers";
const RPC_URL = "https://shared.us-east-1.getblock.io/<ACCESS_TOKEN>";
const provider = new ethers.JsonRpcProvider(RPC_URL);
async function Call() {
  try {
     const result = await provider.send("eth_sign",
 [
    "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "0x48656c6c6f20576f726c64"
  ]);    
console.log("The result:", result);
    return result;
  } catch (error) {
    console.error("The error:", error);
    throw error;
  }
}
```

{% endtab %}
{% endtabs %}