# useSubnameSignature

A React hook for managing subname signature operations and authentication.

***

## Usage

```typescript
import { useSubnameSignature } from '@justaname.id/react'

function SubnameSignatureComponent() {
  const { getSignature, isSubnameSignaturePending } = useSubnameSignature()
  
  const handleGetSignature = async () => {
    try {
      const signatureData = await getSignature()
      console.log('Signature:', signatureData.signature)
      console.log('Message:', signatureData.message)
      console.log('Address:', signatureData.address)
      console.log('Expires:', signatureData.expirationTime)
    } catch (err) {
      console.error('Failed to get signature:', err)
    }
  }
  
  return (
    <button onClick={handleGetSignature} disabled={isSubnameSignaturePending}>
      {isSubnameSignaturePending ? 'Signing...' : 'Get Signature'}
    </button>
  )
}
```

***

## Returns

An object containing:

* `getSignature`: Function that returns a promise with signature data:
  * `signature`: The signature string
  * `message`: The message that was signed
  * `address`: The address that signed
  * `expirationTime`: When the signature expires
* `isSubnameSignaturePending`: Boolean indicating if signing is in progress
* `isSubnameSignatureFetching`: Boolean indicating if fetching is in progress

## Defined in

[packages/@justaname.id/react/src/lib/providers/JustaNameProvider.tsx:172](https://github.com/JustaName-id/JustaName-sdk/blob/dc845c10af242e3ca87d95ef392516ac0bfa8b95/packages/@justaname.id/react/src/lib/providers/JustaNameProvider.tsx#L172)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.justaname.id/sdk-reference/justaname-react-sdk/functions/usesubnamesignature.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.