> For the complete documentation index, see [llms.txt](https://docs.volary.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.volary.io/sdks-guide/blockchain-sdks/wallet-sdk/ismnemonic/evm.md).

# evm

## Description

The `isMnemonic` function is used to validate the format and correctness of a mnemonic phrase. It accepts a mnemonic phrase as a string and an optional `wordlist` parameter, which represents the wordlist used to generate the mnemonic (default is the English wordlist). The function returns a boolean value indicating whether the mnemonic is valid or not.

## Parameters

| Parameter  | Data Type | Description                                                                |
| ---------- | --------- | -------------------------------------------------------------------------- |
| `mnemonic` | string    | The mnemonic phrase to be validated.                                       |
| `wordlist` | Wordlist  | (Optional) The wordlist used to generate the mnemonic. Default is English. |

## Response

| Field          | Data Type | Description                                                    |
| -------------- | --------- | -------------------------------------------------------------- |
| `return value` | boolean   | Indicates whether the mnemonic is valid (true) or not (false). |

## Example Request and Response

### Prerequisites

Before making requests with Volary SDK, you must have it installed.

You can install Volary SDK using either **`npm`** or **`yarn`**. Use the following commands to install Volary SDK:

```sh
npm install @nest25/wallet-lib
OR
yarn add @nest25/wallet-lib
```

### Request

Here is an example of how to make a `isMnemonic` request using the Volary SDK:

```javascript
const { Wallet } = require('@nest25/wallet-lib');

const wallet = new Wallet('');

async function main() {
  const response = await wallet.isMnemonic(
    'labor shaft stick degree figure trade outdoor deposit urge clog cattle feed',
  );
  console.log(response);
}

main();

```

### Response

{% code overflow="wrap" %}

```sh
  { true }
```

{% endcode %}

## Use Cases

* **Validating a mnemonic phrase:** By invoking this function with a mnemonic phrase, you can check if the provided mnemonic is in the correct format and corresponds to a valid mnemonic phrase.
* **Custom wordlist support:** You can optionally provide a custom `wordlist` parameter if the mnemonic was generated using a different wordlist than the default English wordlist.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.volary.io/sdks-guide/blockchain-sdks/wallet-sdk/ismnemonic/evm.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.