> For the complete documentation index, see [llms.txt](https://circular-protocol.gitbook.io/standard-apis/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://circular-protocol.gitbook.io/standard-apis/api-docs/php/getpublickey.md).

# getPublicKey()

**Method signature**

```php
private function getPublicKey($privateKey) 
```

**Parameters**

| Name       | Type   | Description                                         |
| ---------- | ------ | --------------------------------------------------- |
| privateKey | string | The Private Key from where to derive the Public Key |

**Example**

```php
<?php
require 'vendor/autoload.php';
use CircularProtocol\Api\CircularProtocolAPI;

$circular = new CircularProtocolAPI();
$blockchain = "0x8a20baa40c45dc5055aeb26197c203e576ef389d9acb171bd62da11dc5ad72b2";
$address = "0x8b1dd25076c04c5139acba458f86c69cd2d322c61d19bc28daa3bbd945083738";

$result = $circular->getPublicKey($blockchain, $address, $privateKey);
echo $result;
```

**Result**

The result will be an object of type String:

```
04b92abae6932e0faa578231fe4f6d83237acccb09f5343a5455abfaf8e2091a989e64dae6e4ebb9f6a1be5bd48d0bab6dbc99641514f19ee43052ab27178fd9ce
```