---
title: signMessageV2
---
# signMessageV2 <TitleWithCodeLink2 link="signMessageV2" />

Sign a plaintext string

_The sign interface is to sign the Hex format string, and the signature verification uses verifyMessage interface. But signMessageV2 can sign a plaintext string. Please use the verifyMessageV2 interface for signature verification._

**Note**:
- If message is a string, it is treated as a string and converted to its representation in UTF8 bytes.
- If and only if a message is a Bytes Array will it be treated as binary data.
- For example, signMessageV2 will take the string "0x1234" as a 6 characters string not the hex string.
- If you only want to sign a hash, you should convert your hash string to an Bytes Array first using `TronWeb.utils.ethersUtils.arrayify` utility function.

## Usage

```js
// Call directly，privatekey is needed in this way
tronWeb.trx.signMessageV2(message, privateKey);

// Called via the instantiated tronWeb object
tronWeb.trx.signMessageV2(message, privateKey);
```

## Parameters

| Parameters | Parameter Description  | Data Type      |
| ---------- | --------------------| -------------- |
| message    | Message to be signed    | ByteArray / String |
| privateKey | The private key used for signing. Optional. The default value is the private key passed in when constructing tronweb object. | String |

## Return

String - the signature.

## Example

```js
var message = 'hello world';
var signature = tronWeb.trx.signMessageV2(message);
console.log(signature);
// output-start
0x1d1b0779da653630d29fc4f1ea1e5a109a30d52e21e7657fa896d2fccc3b430b14089377e13b6ed35ef371a1c91873773d568219d1100fa8595e5f2eec39e3e41c
// output-end
```