Programmgesteuertes Solana-Staking mit Helius SDK

async function stakeSOL(amountInSol: number) {
  try {
    // Create staking transaction
    const { serializedTx, stakeAccountPubkey } = 
      await helius.rpc.createStakeTransaction(payer.publicKey, amountInSol);
    
    // Deserialize and sign transaction
    const transaction = Transaction.from(bs58.decode(serializedTx));
    transaction.partialSign(payer);
    
    // Send transaction
    const signature = await helius.connection.sendRawTransaction(
      transaction.serialize(),
      { 
        skipPreflight: false,
        preflightCommitment: 'confirmed'
      }
    );
    
    // Wait for confirmation
    await helius.connection.confirmTransaction(signature, 'confirmed');
    
    return {
      signature,
      stakeAccount: stakeAccountPubkey,
      amount: amountInSol
    };
    
  } catch (error) {
    console.error('Staking failed:', error);
    throw error;
  }
}

// Usage
const result = await stakeSOL(2.5);
console.log(`Successfully staked ${result.amount} SOL`);

async function batchStake(wallets: Keypair[], amount: number) {
  const promises = wallets.map(async (wallet) => {
    try {
      const { serializedTx, stakeAccountPubkey } = 
        await helius.rpc.createStakeTransaction(wallet.publicKey, amount);
      
      const tx = Transaction.from(bs58.decode(serializedTx));
      tx.partialSign(wallet);
      
      return helius.connection.sendRawTransaction(tx.serialize());
    } catch (error) {
      console.error(`Failed to stake for ${wallet.publicKey.toBase58()}:`, error);
      return null;
    }
  });
  
  const results = await Promise.allSettled(promises);
  const successful = results.filter(r => r.status === 'fulfilled').length;
  
  console.log(`Successfully staked for ${successful}/${wallets.length} wallets`);
}

// Get individual instructions
const { instructions } = await helius.rpc.getStakeInstructions(
  payer.publicKey,
  2.5
);

// Send with Smart Transaction features:
// - Automatic priority fee optimization
// - Retry logic with backoff
// - Better error handling
const signature = await helius.rpc.sendSmartTransaction(
  instructions,
  [payer],
  {
    skipPreflight: false,
    maxRetries: 3
  }
);

console.log(`Smart transaction sent: ${signature}`);