solana_web3 0.0.4

Dart implementation of Solana's JSON RPC API with support for common Programs.

example/main.dart

/// Imports
import 'package:solana_web3/solana_web3.dart' as web3;
import 'package:solana_web3/programs/system.dart';

/// Transfer tokens from one wallet to another.
void main(final List<String> _arguments) async {

  // Create a connection to the devnet cluster.
  final cluster = web3.Cluster.devnet;
  final connection = web3.Connection(cluster);

  print('Creating accounts...\n');

  // Create a wallet to transfer tokens from.
  final wallet1 = web3.Keypair.generateSync();
  final address1 = wallet1.publicKey;

  // Credit the wallet that will be sending the tokens.
  await connection.requestAirdropAndConfirmTransaction(
    address1, 
    web3.solToLamports(2).toInt(),
  );

  // Create a wallet to transfer tokens to.
  final wallet2 = web3.Keypair.generateSync();
  final address2 = wallet2.publicKey;

  // Check the account balances before making the transfer.
  final balance = await connection.getBalance(address1);
  print('Account $address1 has an initial balance of $balance lamports.');
  print('Account $address2 has an initial balance of 0 lamports.\n');

  // Create a System Program instruction to transfer 1 SOL from [address1] to [address2].
  final transaction = web3.Transaction();
  transaction.add(
    SystemProgram.transfer(
      fromPublicKey: address1, 
      toPublicKey: address2, 
      lamports: web3.solToLamports(1),
    ),
  );

  // Send the transaction to the cluster and wait for it to be confirmed.
  print('Send and confirm transaction...\n');
  await connection.sendAndConfirmTransaction(
    transaction, 
    signers: [wallet1], // Fee payer + transaction signer.
  );

  // Check the updated account balances.
  final balance1 = await connection.getBalance(address1);
  final balance2 = await connection.getBalance(address2);
  print('Account $address1 has an updated balance of $balance1 lamports.');
  print('Account $address2 has an updated balance of $balance2 lamports.');
}