> ## Documentation Index
> Fetch the complete documentation index at: https://daehan-base.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# personal_sign

> Sign data using a specific account with Ethereum-specific signature format

Defined in [EIP-191](https://eips.ethereum.org/EIPS/eip-191)

<Info>
  Signs data using a specific account. This method calculates an Ethereum specific signature with: `sign(keccak256("\x19Ethereum Signed Message:\n" + len(message) + message)))`.
</Info>

## Parameters

<ParamField body="data" type="string" required>
  The data to sign, in hexadecimal format.
</ParamField>

<ParamField body="address" type="string" required>
  The address of the account that should sign the data.
</ParamField>

## Returns

<ResponseField name="result" type="string">
  A signature string in hexadecimal format.
</ResponseField>

## Example Usage

<RequestExample>
  ```json Request theme={null}
  {
    "id": 1,
    "jsonrpc": "2.0",
    "method": "personal_sign",
    "params": [
      "0x48656c6c6f2c20576f726c6421",
      "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
    ]
  }
  ```
</RequestExample>

<ResponseExample>
  ```json Success Response theme={null}
  {
    "id": 1,
    "jsonrpc": "2.0",
    "result": "0x30755ed65396facf86c53e6217c52b4daebe72aa4941d89635409de4c9c7a9466d0e6928a2e2d2e8f8e8c8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e"
  }
  ```
</ResponseExample>

## Error Handling

<ResponseField name="code" type="number">
  Error code indicating the type of error that occurred.
</ResponseField>

<ResponseField name="message" type="string">
  Human-readable error message describing what went wrong.
</ResponseField>

| Code | Message                        | Description                               |
| ---- | ------------------------------ | ----------------------------------------- |
| 4001 | User denied signature request  | User rejected the signing request         |
| 4100 | Requested method not supported | The method is not supported by the wallet |
| 4200 | Wallet not connected           | No wallet connection available            |
| 4300 | Invalid parameters             | The provided parameters are invalid       |

<Warning>
  Always verify signatures on the server side before trusting them. Client-side signature verification should only be used for UX purposes.
</Warning>