> ## Documentation Index
> Fetch the complete documentation index at: https://www.dynamic.xyz/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# generateTonConnectProof

# generateTonConnectProof

Generates a TonConnect proof for authentication with backend services. This creates a cryptographic proof that the user owns the wallet.

## Usage

```javascript theme={"system"}
import { generateTonConnectProof, isTonWalletAccount } from "@dynamic-labs-sdk/ton";
import { getPrimaryWalletAccount } from "@dynamic-labs-sdk/client";

const walletAccount = getPrimaryWalletAccount();

if (walletAccount && isTonWalletAccount(walletAccount)) {
  const proof = await generateTonConnectProof({
    payload: "authentication-challenge-from-backend",
    walletAccount,
  });

  console.log("TON Connect Proof:", proof);
  // {
  //   address: "UQ...",
  //   domain: { lengthBytes: 11, value: "example.com" },
  //   timestamp: 1704067200,
  //   payload: "authentication-challenge-from-backend",
  //   signature: "base64-encoded-signature"
  // }

  // Send this proof to your backend for verification
}
```

## Parameters

| Parameter       | Type                       | Description                                                             |
| --------------- | -------------------------- | ----------------------------------------------------------------------- |
| `payload`       | `string`                   | The proof payload, typically a nonce or challenge from your backend     |
| `walletAccount` | `TonWalletAccount`         | The wallet account to generate the proof for                            |
| `client`        | `DynamicClient` (optional) | The Dynamic client instance. Only required when using multiple clients. |

## Returns

`Promise<TonConnectProof>` - A promise that resolves to the proof object:

| Field       | Type               | Description                        |
| ----------- | ------------------ | ---------------------------------- |
| `address`   | `string`           | Wallet address                     |
| `domain`    | `TonConnectDomain` | Domain information (see below)     |
| `payload`   | `string`           | The payload string that was signed |
| `signature` | `string`           | Signature as a base64 string       |
| `timestamp` | `number`           | Unix timestamp in seconds          |

### TonConnectDomain

| Field         | Type     | Description                        |
| ------------- | -------- | ---------------------------------- |
| `lengthBytes` | `number` | Length of domain value in bytes    |
| `value`       | `string` | Domain value (e.g., "example.com") |

## Errors

| Error                       | Description                                                     |
| --------------------------- | --------------------------------------------------------------- |
| `NotTonProviderError`       | Thrown if the wallet account's provider is not a TON provider   |
| `MethodNotImplementedError` | Thrown if the wallet provider does not support proof generation |

## Related functions

* [isTonWalletAccount](/javascript/reference/ton/checking-ton-wallet-account-type) - Check if a wallet account is a TON account
* [sendTon](/javascript/reference/ton/send-ton) - Send native TON