> For the complete documentation index, see [llms.txt](https://ai-agent-sdk-docs.crypto.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-agent-sdk-docs.crypto.com/crypto.com-developer-platform/on-chain-developer-platform-client-sdk/cronosid-module.md).

# CronosID Module

CronosID module manages the conversion between CronosIDs and standard addresses.

{% hint style="info" %}
Note: CronosId is not supported on Cronos ZK EVM Mainnet.
{% endhint %}

To learn more about how to use the AI Agent SDK to interact with the wallet module, please visit [AI Agent SDK CronosId Operations](/crypto.com-ai-agent-sdk/core-concepts-overview/blockchain-functions/cronosid-operations.md).

#### 6.1 Is CronosId

Checks if a given string is a valid CronosId, which is a string ending with '.cro' and not empty. Example: 'alice.cro' is a valid CronosId, but 'alice' is not.

{% tabs %}
{% tab title="TypeScript" %}
Function Name

```typescript
isCronosId
```

{% tabs %}
{% tab title="Query" %}

* Arguments

  ```typescript
  {string} name: The string to check for CronosId validity.
  ```
* Example Code

  ```typescript
  import { CronosId } from '@crypto.com/developer-platform-client';

  const result = CronosId.isCronosId('example-cronos-id');
  console.log(result);
  ```

{% endtab %}

{% tab title="Response" %}

* Returns

  ```typescript
  {boolean}: True if the string is a valid CronosId, false otherwise.
  ```
* Example Return

  ```typescript
  example-boolean
  ```

{% endtab %}
{% endtabs %}
{% endtab %}
{% endtabs %}

#### 6.2 Resolve CronosId

Resolves a CronosId to a wallet address.

{% tabs %}
{% tab title="Python" %}
Function Name

```python
resolve_name
```

{% tabs %}
{% tab title="Query" %}

* Arguments

  ```python
  name (str): The CronosId name to resolve (CronosIds with the `.cro` suffix are supported, e.g. `xyz.cro`)
  ```
* Example Code

  ```python
  from crypto_com_developer_platform_client import CronosId

  address = CronosId.resolve_name('example-cronos-id')
  print(address)
  ```

{% endtab %}

{% tab title="Response" %}

* Returns

  ```python
  Response containing the resolved blockchain address.
  ```
* Errors

  ```python
  ValueError: If the CronosId class is not initialized with a Client instance.
  ```
* Example Return

  ```python
  {'status': 'Success', 'data': 'example-address'}
  ```

{% endtab %}
{% endtabs %}
{% endtab %}

{% tab title="TypeScript" %}
Function Name

```typescript
forwardResolve
```

{% tabs %}
{% tab title="Query" %}

* Arguments

  ```typescript
  {string} cronosId: The CronosId to resolve.
  ```
* Example Code

  ```typescript
  import { CronosId } from '@crypto.com/developer-platform-client';

  try {
    const address = wait CronosId.forwardResolve('alice.cro');
    console.log(address);
  }
    catch(err) {
    console.log(err);
  }
  ```

{% endtab %}

{% tab title="Response" %}

* Returns

  ```typescript
  {Promise<string>}: A promise that resolves to the resolved address.
  ```
* Errors

  ```typescript
  {Error}: Throws an error if the CronosId is not valid or if the resolution fails.
  ```
* Example Return

  ```typescript
  {
    status: 'Success',
    data: 'example-address'
  }
  ```

{% endtab %}
{% endtabs %}
{% endtab %}
{% endtabs %}

#### 6.3 Reverse Resolve Address

Resolves a wallet address to a CronosId if it has one.

{% tabs %}
{% tab title="Python" %}
Function Name

```python
lookup_address
```

{% tabs %}
{% tab title="Query" %}

* Arguments

  ```python
  address (str): The blockchain address to lookup
  ```
* Example Code

  ```python
  from crypto_com_developer_platform_client import CronosId

  cronosId = CronosId.lookup_address('example-address')
  print(cronosId)
  ```

{% endtab %}

{% tab title="Response" %}

* Returns

  ```python
  Response containing the CronosId name.
  ```
* Errors

  ```python
  ValueError: If the CronosId class is not initialized with a Client instance.
  ```
* Example Return

  ```python
  {'status': 'Success', 'data': 'example-cronos-id'}
  ```

{% endtab %}
{% endtabs %}
{% endtab %}

{% tab title="TypeScript" %}
Function Name

```typescript
reverseResolve
```

{% tabs %}
{% tab title="Query" %}

* Arguments

  ```typescript
  {string} address: The wallet address to resolve.
  ```
* Example Code

  ```typescript
  import { CronosId } from '@crypto.com/developer-platform-client';

  try {
    const cronosId = await CronosId.reverseResolve('example-address');
    console.log(cronosId);
  }
    catch(err) {
    console.log(err);
  }
  ```

{% endtab %}

{% tab title="Response" %}

* Returns

  ```typescript
  {Promise<string>}: A promise that resolves to the resolved CronosId.
  ```
* Errors

  ```typescript
  {Error}: Throws an error if the address is not valid or if the resolution fails.
  ```
* Example Return

  ```typescript
  {
    status: 'Success',
    data: 'example-cronos-id'
  }
  ```

{% endtab %}
{% endtabs %}
{% endtab %}
{% endtabs %}