@tonconnect/sdk

TON Connect SDK

⚠️ TonConnect is currently in beta testing. Use it at your own risk.

Use it to connect your app to TON wallets via TonConnect protocol. You can find more details and the protocol specification in the docs. See the example of sdk usage here.

Latest API documentation

Getting started

Installation with cdn

Add the script to your HTML file:

<script src="https://unpkg.com/@tonconnect/sdk@latest/dist/tonconnect-sdk.min.js"></script>

ℹ️ If you don't want auto-update the library, pass concrete version instead of latest, e.g.

<script src="https://unpkg.com/@tonconnect/sdk@0.0.34/dist/tonconnect-sdk.min.js"></script>

You can find TonConnect in global variable TonConnectSDK, e.g.

<script>
    const connector = new TonConnectSDK.TonConnect();
</script>

Installation with npm

npm i @tonconnect/sdk

Usage

Init connector and call restoreConnection. If user connected his wallet before, connector will restore the connection

import TonConnect from '@tonconnect/sdk';

const connector = new TonConnect();

connector.restoreConnection();

Add the tonconnect-manifest

App needs to have its manifest to pass meta information to the wallet. Manifest is a JSON file named as tonconnect-manifest.json following format:

{
  "url": "<app-url>",                        // required
  "name": "<app-name>",                      // required
  "iconUrl": "<app-icon-url>",               // required
  "termsOfUseUrl": "<terms-of-use-url>",     // optional
  "privacyPolicyUrl": "<privacy-policy-url>" // optional
}

Best practice is to place the manifest in the root of your app, e.g. https://myapp.com/tonconnect-manifest.json. It allows the wallet to handle your app better and improve the UX connected to your app. Make sure that manifest is available to GET by its URL.

See details

If your manifest placed not in the root of your app, you can specify its path:

    const connector = new TonConnect({ manifestUrl: 'https://myApp.com/assets/tonconnect-manifest.json' });

Subscribe to the connection status changes

connector.onStatusChange(
    walletInfo => {
        // update state/reactive variables to show updates in the ui
    } 
);

Fetch wallets list

TonConnect is build to support different wallets. You can fetch all supported wallets list and show a custom wallet selection dialog for user

const walletsList = await connector.getWallets();

/* walletsList is 
{
    name: string;
    imageUrl: string;
    tondns?: string;
    aboutUrl: string;
    universalLinkBase?: string;
    bridgeUrl?: string;
    jsBridgeKey?: string;
    injected?: boolean; // true if this wallet is injected to the webpage
    embedded?: boolean; // true if the dapp is opened inside this wallet's browser
}[] 
 */

Initialize a wallet connection when user clicks to 'connect' button in your app

Initialize a remote wallet connection via universal link

const walletConnectionSource = {
    universalLinkBase: 'https://app.mycooltonwallet.com',
    bridgeURL: 'https://bridge.mycooltonwallet.com,'
}

const universalLink = connector.connect(walletConnectionSource);

Then you have to show this link to user as QR code, or use it as a deeplink. You will receive an update in connector.onStatusChange when user approves connection in the wallet

Initialize injected wallet connection

const walletConnectionSource = {
    jsBridgeKey: 'tonkeeper'
}

connector.connect(walletConnectionSource);

You will receive an update in connector.onStatusChange when user approves connection in the wallet

Send transaction

if (!connector.connected) {
    alert('Please connect wallet to send the transaction!');
}

const transaction = {
    valid_until: 1658253458,
    messages: [
        {
            address: "0:412410771DA82CBA306A55FA9E0D43C9D245E38133CB58F1457DFB8D5CD8892F",
            amount: "20000000",
            initState: "base64bocblahblahblah==" // just for instance. Replace with your transaction initState or remove
        },
        {
            address: "0:E69F10CC84877ABF539F83F879291E5CA169451BA7BCE91A37A5CED3AB8080D3",
            amount: "60000000",
            payload: "base64bocblahblahblah==" // just for instance. Replace with your transaction payload or remove
        }
    ]
}

try {
    const result = await connector.sendTransaction(transaction);
    
    // you can use signed boc to find the transaction 
    const someTxData = await myAppExplorerService.getTransaction(result.boc);
    alert('Transaction was sent successfully', someTxData);
} catch (e) {
    if (e instanceof UserRejectedError) {
        alert('You rejected the transaction. Please confirm it to send to the blockchain');
    } else {
        alert('Unknown error happened', e);
    }
}

Backend authorization

To authorize user in your backend with TonConnect you can use following schema:

1. Fetch auth payload from your backend. It might be any random value. Backend must save information that this payload was sent to the client to check payload correctness later.
2. Connect to the wallet when user clicks to the connection button:

    connector.connect(walletConnectionSource, { tonProof: "<your-fetched-payload>" });

Note that you can use tonProof only with connector.connect() method. This feature is not available in connector.restoreConnection(). 3. Read a signed result after user approves connection:

connector.onStatusChange(wallet => {
			if (!wallet) {
				return;
			}

			const tonProof = wallet.connectItems?.tonProof;

			if (tonProof) {
				if ('proof' in tonProof) {
                    // send proo to your backend
					// e.g. myBackendCheckProof(tonProof.proof, wallet.account);
					return;
				}

				console.error(tonProof.error);
			}
		});

1. Send proof and user's account data to your backend. Backend should check the proof correctness and check that payload inside the proof was generated before. After all checks backend should return an auth token to the client. Notice that Account contains the walletStateInit property which can be helpful for your backend to get user's public key if user's wallet contract doesn't support corresponding get method.
2. Client saves the auth token in the localStorage and use it to access to auth-required endpoints. Client should delete the token when user disconnects the wallet.

See an example of a dapp using backend authorization.

See an example of the dapp backend.

Use with NodeJS

You can use the SDK in frontend apps and in backend apps created with NodeJS.

Installation

npm i @tonconnect/sdk

Init connector

When you use the SDK in backend, you have to pass manifestUrl and IStorage implementation to the TonConnect constructor.

See more about the manifest.

import TonConnect from '@tonconnect/sdk';

const storage: IStorage = <your implementation of the IStorage>

const connector = new TonConnect({ manifestUrl, storage });

Your storage should implement following interface:

export interface IStorage {
    setItem(key: string, value: string): Promise<void>;
    getItem(key: string): Promise<string | null>;
    removeItem(key: string): Promise<void>;
}

See details about IStorage in the API documentation.

Other steps are the same as for browser apps.