3ph / walletconnect-dart-sdk

Open protocol for connecting dApps to mobile wallets with QR code scanning or deep linking.

WalletConnect is an open source protocol for connecting decentralised applications to mobile wallets with QR code scanning or deep linking. A user can interact securely with any Dapp from their mobile phone, making WalletConnect wallets a safer choice compared to desktop or browser extension wallets.

Introduction

WalletConnect connects mobile & web applications to supported mobile wallets. The WalletConnect session is started by scanning a QR code (desktop) or by clicking an application deep link (mobile).

WalletConnect-Dart-SDK is a community SDK and port of the official WalletConnect-monorepo.

WalletConnect-Dart currently supports:

• Algorand
• Ethereum

You can easily add your own network by extending from WalletConnectProvider and implementing the required methods using sendCustomRequest. An example from Binance Smart Chain can be found here. For more information regarding the implementation, check out EthereumWalletConnectProvider and AlgorandWalletConnectProvider.

WalletConnect lets you build:

• Decentralized web applications and display QR codes with qr_flutter
• Mobile dApps with deep linking using url_launcher
• Cross-platform wallets

Once installed, you can simply connect your application to a wallet.

// Create a connector
final connector = WalletConnect(
    bridge: 'https://bridge.walletconnect.org',
    clientMeta: PeerMeta(
      name: 'WalletConnect',
      description: 'WalletConnect Developer App',
      url: 'https://walletconnect.org',
      icons: [
        'https://gblobscdn.gitbook.com/spaces%2F-LJJeCjcLrr53DcT1Ml7%2Favatar.png?alt=media'
      ],
    ),
);

Usage

Dapps

Initiate connection

// Create a connector
final connector = WalletConnect(
    bridge: 'https://bridge.walletconnect.org',
    clientMeta: PeerMeta(
      name: 'WalletConnect',
      description: 'WalletConnect Developer App',
      url: 'https://walletconnect.org',
      icons: [
        'https://gblobscdn.gitbook.com/spaces%2F-LJJeCjcLrr53DcT1Ml7%2Favatar.png?alt=media'
      ],
    ),
);

// Subscribe to events
connector.on('connect', (session) => print(session));
connector.on('session_update', (payload) => print(payload));
connector.on('disconnect', (session) => print(session));

// Create a new session
if (!connector.connected) {
    final session = await connector.createSession(
        chainId: 4160,
        onDisplayUri: (uri) => print(uri),
    );
}

Sign transaction

final sender = Address.fromAlgorandAddress(address: session.accounts[0]);

// Fetch the suggested transaction params
final params = await algorand.getSuggestedTransactionParams();

// Build the transaction
final tx = await (PaymentTransactionBuilder()
  ..sender = sender
  ..noteText = 'Signed with WalletConnect'
  ..amount = Algo.toMicroAlgos(0.0001)
  ..receiver = sender
  ..suggestedParams = params)
    .build();

// Sign the transaction
final signedBytes = await provider.signTransaction(
    tx.toBytes(),
    params: {
    'message': 'Optional description message',
    },
);

// Broadcast the transaction
final txId = await algorand.sendRawTransactions(
    signedBytes,
    waitForConfirmation: true,
);

// Kill the session
connector.killSession();

Wallets

Initiate connection

// Create a connector
final connector = WalletConnect(
    uri: 'wc:8a5e5bdc-a0e4-47...TJRNmhWJmoxdFo6UDk2WlhaOyQ5N0U=',
    clientMeta: PeerMeta(
      name: 'WalletConnect',
      description: 'WalletConnect Developer App',
      url: 'https://walletconnect.org',
      icons: [
        'https://gblobscdn.gitbook.com/spaces%2F-LJJeCjcLrr53DcT1Ml7%2Favatar.png?alt=media'
      ],
    ),
);

// Subscribe to events
connector.on('connect', (session) => print(session));
connector.on('session_request', (payload) => print(payload));
connector.on('disconnect', (session) => print(session));

Manage connection

// Approve session
await connector.approveSession(chainId: 4160, accounts: ['0x4292...931B3']);

// Reject session
await connector.rejectSession(message: 'Optional error message');

// Update session
await connector.updateSession(SessionStatus(chainId: 4000, accounts: ['0x4292...931B3']));

Kill session

await connector.killSession();

Changelog

Please see CHANGELOG for more information on what has changed recently.

Contributing & Pull Requests

Feel free to send pull requests.

Please see CONTRIBUTING for details.

Credits

• Tomas Verhelst
• Tom Friml
• All Contributors

License

The MIT License (MIT). Please see License File for more information.