> For the complete documentation index, see [llms.txt](https://yuga.gitbook.io/zkyuga-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yuga.gitbook.io/zkyuga-whitepaper/developer-guide/erc721/getapproved.md).

# getApproved

The `getApproved` method, specific to the ERC-721 token standard, facilitates users in querying the Ethereum address (if any) currently authorized to transfer a particular ERC-721 token. In this standard, each non-fungible token (NFT) can only be approved for transfer to one address at a time, apart from its owner, who always retains the privilege to transfer the token. This functionality is integral to the `ERC721Instance` object, which can be accessed via appropriate methods provided by client libraries, such as `ZkyugaClient`.

### Method Signature

```javascript
async getApproved(tokenId: string): Promise<string>
```

#### Parameters

| Parameter | Type   | Description                                                                                     |
| --------- | ------ | ----------------------------------------------------------------------------------------------- |
| tokenId   | string | The unique identifier of the ERC-721 token for which you intend to verify the approved address. |

#### Returns

* A `Promise` resolving to an Ethereum address string. If no address is authorized, it might return the zero address (0x0000000000000000000000000000000000000000).

### Usage Example

First, initialize the desired ERC-721 token contract:

```javascript
const erc721 = zkyugaClient.getERC721Instance("your ERC-721 contract address here");
```

Then, utilize the `getApproved` method with a specific token ID:

```javascript
const tokenId = "12345"; // Example token ID
const approvedAddress = await erc721.getApproved(tokenId);
if (approvedAddress == "0x0000000000000000000000000000000000000000") {
    console.log(`Token ID ${tokenId} has no approved address.`);
} else {
    console.log(`Token ID ${tokenId} is approved for transfer by: ${approvedAddress}`);
}
```

### Notes

* Keep in mind that even if a token has an approved address, its owner can always transfer it without additional approvals.
* For user interfaces or frontend applications, consider gracefully handling scenarios where the token lacks any approved address (e.g., by providing informative feedback to users).

***