# evm

## Description

The `isPrivateKey` function is an asynchronous function used to validate whether a given string is a valid private key for EVM chains. 

It utilizes the ethers.js library to create an Ethereum wallet instance using the provided private key and checks if the derived wallet address is a valid Ethereum address.

## Parameters

| Parameter    | Data Type | Description                      |
| ------------ | --------- | -------------------------------- |
| `privateKey` | string    | The private key to be validated. |

## Response

| Field          | Data Type | Description                                                       |
| -------------- | --------- | ----------------------------------------------------------------- |
| `return value` | boolean   | Indicates whether the private key 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 `isPrivateKey` request using the Volary SDK:

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

const wallet = new Wallet('');

async function main() {
    const response = await wallet.isPrivateKey('ava', 'your-private-key');
    console.log("response-->", response);
}

main();

```

### Response

{% code overflow="wrap" %}

```sh
   response--> false
```

{% endcode %}

## Use Cases

* **Validating a private key:** By invoking this function with a private key, you can check if the provided private key is valid for Ethereum.
* **Checking address validity:** The function uses the derived wallet address to determine the validity of the private key.
* **Handling errors:** If any error occurs during the creation of the wallet or address validation, the function will catch the error and return `false`, indicating that the private key is not valid.


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# Agent Instructions: 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:

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

The question should be specific, self-contained, and written in natural language.
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.