# Common

> Affinidi TDK common libraries that provides utility functions.

## Install Dependency

Package: affinidi-tdk/affinidi-tdk-php

```bash
composer require affinidi-tdk/affinidi-tdk-php
```

Check the latest version on the [Packagist repository](https://packagist.org/packages/affinidi-tdk/affinidi-tdk-php) or view the source on [GitHub](https://github.com/affinidi/affinidi-tdk-php/tree/main/src/Common).

## Classes and Methods

### VaultUtils

Provides utility functions for Affinidi Vault requests.

#### buildShareLink

Generates the Affinidi Iota Framework share link to initiate a request to the Affinidi Vault.

Parameters

    request
    string
    Required
  Signed request token generated from the prepareRequest method of the [Iota Browser](/dev-tools/affinidi-tdk.md#libraries) library.

    client_id
    string
    Required
  Client ID from the signed request token.

Example

```php
require_once 'vendor/autoload.php';
use AffinidiTdk\Common\Helpers\VaultUtils;

$shareLink = VaultUtils::buildShareLink($request, $client_id);
```

#### buildClaimLink

Generates the Credential Issuance claim link to claim the credential from the Affinidi Vault.

Parameters

    credentialOfferUri
    string
    Required
  Credential Offer URI returned from the startIssuance method of the [Credential Issuance](/dev-tools/affinidi-tdk/php/clients/credential-issuance.md#startissuance) client.

Example

```php
require_once 'vendor/autoload.php';
use AffinidiTdk\Common\Helpers\VaultUtils;

$claimLink = VaultUtils::buildClaimLink($credentialOfferUri);
```