Dynamic SDK Solana #

The Dynamic SDK Solana package provides convenient methods for interacting with the Solana blockchain. It allows you to create signers, send transactions, and sign messages seamlessly.

Full Example #

Here is a complete example of how to initialize the Dynamic SDK and use the Solana package to sign a message and send a transaction.

1. Initialize the SDK #

First, initialize the DynamicSDK in your main.dart file. This should be done before running your app.

// main.dart
import 'package:dynamic_sdk/dynamic_sdk.dart';
import 'package:flutter/material.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  DynamicSDK.init(
    props: ClientProps(
      environmentId: 'YOUR_ENVIRONMENT_ID', // Replace with your Environment ID
      appLogoUrl: 'https://yourapp.com/logo.png',
      appName: 'Your App Name',
      redirectUrl: 'yourapp://',
    ),
  );
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    // Your app's widget tree
    return MaterialApp(
      home: YourMainScreen(),
    );
  }
}

2. Connect a Wallet and Use Solana Features #

Once the SDK is initialized, you can connect a wallet and then use the Solana-specific functionalities. The following example shows a widget that connects a wallet, and then provides buttons to sign a message and send a transaction.

// your_main_screen.dart
import 'package:flutter/material.dart';
import 'package:dynamic_sdk/dynamic_sdk.dart';
import 'package:dynamic_sdk_solana/dynamic_sdk_solana.dart';
import 'package:solana_web3_latest/solana_web3.dart';
import 'package:solana_web3_latest/programs.dart';

class YourMainScreen extends StatefulWidget {
  @override
  _YourMainScreenState createState() => _YourMainScreenState();
}

class _YourMainScreenState extends State<YourMainScreen> {
  final DynamicSDK _sdk = DynamicSDK.instance;
  BaseWallet? _wallet;

  @override
  void initState() {
    super.initState();
    _sdk.events.on(
      'walletConnected',
      (data) => setState(() {
        _wallet = data;
      }),
    );
    _sdk.events.on(
      'walletDisconnected',
      (data) => setState(() {
        _wallet = null;
      }),
    );
  }
  
  Future<void> _connectWallet() async {
    await _sdk.connectWallet();
  }

  Future<void> _signSolanaMessage(String message) async {
    if (_wallet == null) {
      print('Please connect a wallet first.');
      return;
    }
    
    try {
      final signer = _sdk.solana.createSigner(wallet: _wallet!);
      final signature = await signer.signMessage(message: message);
      print('Message signed with signature: $signature');
      // Show success message to the user
    } catch (e) {
      print('An error occurred while signing the message: $e');
      // Show error message to the user
    }
  }

  Future<void> _sendSolanaTransaction(String recipientAddress, double amount) async {
    if (_wallet == null) {
      print('Please connect a wallet first.');
      return;
    }

    try {
      final signer = _sdk.solana.createSigner(wallet: _wallet!);
      final connection = _sdk.solana.createConnection();

      final fromPubKey = Pubkey.fromString(_wallet!.address);
      final toPubKey = Pubkey.fromString(recipientAddress);

      final BlockhashWithExpiryBlockHeight recentBlockhash =
          await connection.getLatestBlockhash();

      final transaction = Transaction.v0(
        payer: fromPubKey,
        recentBlockhash: recentBlockhash.blockhash,
        instructions: [
          SystemProgram.transfer(
            fromPubkey: fromPubKey,
            toPubkey: toPubKey,
            lamports: solToLamports(amount),
          ),
        ],
      );

      final signature = await signer.signAndSendTransaction(transaction: transaction);
      print('Transaction sent with signature: $signature');
      // Show success message to the user
    } catch (e) {
      print('An error occurred while sending the transaction: $e');
      // Show error message to the user
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Dynamic Solana Demo'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            if (_wallet == null)
              ElevatedButton(
                onPressed: _connectWallet,
                child: const Text('Connect Wallet'),
              )
            else
              Text('Connected: ${_wallet!.address}'),
            
            const SizedBox(height: 20),
            
            ElevatedButton(
              onPressed: () => _signSolanaMessage('Hello from Dynamic!'),
              child: const Text('Sign Message'),
            ),

            const SizedBox(height: 20),

            ElevatedButton(
              onPressed: () => _sendSolanaTransaction(
                '4ybGGu1vxysaZrBBSLVGfsxLydHREkHDYHUCnFk6os5D', // Example recipient
                0.001,
              ),
              child: const Text('Send Transaction'),
            ),
          ],
        ),
      ),
    );
  }
}

By following these examples, you can integrate Solana functionalities into your application using the Dynamic SDK.