> For the complete documentation index, see [llms.txt](https://docs.zama.org/protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zama.org/protocol/sdk/api-references/react/useconfidentialtokenaddress.md).

# useConfidentialTokenAddress

Looks up the confidential token address for a given plain ERC-20 token address via the on-chain wrappers registry.

## Import

```ts
import { useConfidentialTokenAddress } from "@zama-fhe/react-sdk";
```

## Usage

{% tabs %}
{% tab title="LookupWrapper.tsx" %}

```tsx
import { useConfidentialTokenAddress } from "@zama-fhe/react-sdk";

function LookupWrapper({ tokenAddress }: { tokenAddress: `0x${string}` }) {
  const { data, isLoading, error } = useConfidentialTokenAddress({ tokenAddress });

  if (isLoading) return <p>Looking up...</p>;
  if (error) return <p>Error: {error.message}</p>;
  if (!data) return null;

  const [found, confidentialAddress] = data;

  if (!found) return <p>No confidential token registered for this ERC-20</p>;

  return <p>Confidential token: {confidentialAddress}</p>;
}
```

{% endtab %}
{% endtabs %}

## Parameters

### tokenAddress

`Address | undefined`

The plain ERC-20 token address to look up. Pass `undefined` to disable the query.

```ts
useConfidentialTokenAddress({ tokenAddress: "0xUSDC" });
```

## Return Type

The `data` field resolves to `readonly [boolean, Address]`:

* `[true, address]` -- registered and valid; `address` is the confidential token
* `[false, nonZeroAddress]` -- registered but revoked; `address` is the former confidential token
* `[false, zeroAddress]` -- no registered pair

## Related

* [useTokenAddress](/protocol/sdk/api-references/react/usetokenaddress.md) -- reverse lookup (confidential → plain)
* [useIsConfidentialTokenValid](/protocol/sdk/api-references/react/useisconfidentialtokenvalid.md) -- check if a confidential token is valid
* [useWrapperDiscovery](/protocol/sdk/api-references/react/usewrapperdiscovery.md) -- alternative lookup via the deployment coordinator
* [WrappersRegistry](/protocol/sdk/api-references/sdk/wrappersregistry.md) -- SDK-level `getConfidentialTokenAddress()` method


---

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