Cách sử dụng requestAirdrop

# Request 1 SOL (1,000,000,000 lamports) to a Devnet address
# Replace <YOUR_WALLET_ADDRESS> with an actual base-58 public key
# Ensure you are targeting a Devnet RPC URL
curl -X POST -H "Content-Type: application/json" -d \
  '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "requestAirdrop",
    "params": [
      "<YOUR_WALLET_ADDRESS>",
      1000000000
    ]
  }' \
  https://devnet.helius-rpc.com/?api-key=<api-key> 

# Request 0.5 SOL with "confirmed" commitment
curl -X POST -H "Content-Type: application/json" -d \
  '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "requestAirdrop",
    "params": [
      "<YOUR_WALLET_ADDRESS>",
      500000000,
      {
        "commitment": "confirmed"
      }
    ]
  }' \
  https://devnet.helius-rpc.com/?api-key=<api-key>

const { Connection, PublicKey, LAMPORTS_PER_SOL } = require('@solana/web3.js');

async function getAirdrop(walletAddress) {
  // Connect to Devnet
  const connection = new Connection('https://devnet.helius-rpc.com/?api-key=<api-key>', 'confirmed');
  const publicKey = new PublicKey(walletAddress);

  try {
    console.log(`Requesting airdrop of 1 SOL to ${walletAddress} on Devnet...`);
    
    // Request an airdrop of 1 SOL
    const airdropSignature = await connection.requestAirdrop(
      publicKey,
      LAMPORTS_PER_SOL // 1 SOL
    );

    console.log(`Airdrop requested. Transaction signature: ${airdropSignature}`);

    // Confirm the transaction
    // Note: The `confirmTransaction` method in web3.js has evolved.
    // For newer versions, you might use `connection.confirmTransaction({ signature: airdropSignature, blockhash: latestBlockhash.blockhash, lastValidBlockHeight: latestBlockhash.lastValidBlockHeight }, 'confirmed');`
    // For simplicity, we'll log the signature and you can check on an explorer.
    // Or, more robustly, you can poll getSignatureStatuses.

    await connection.confirmTransaction(airdropSignature);
    console.log(`Airdrop successful for ${walletAddress}!`);

    const balance = await connection.getBalance(publicKey);
    console.log(`Current balance for ${walletAddress}: ${balance / LAMPORTS_PER_SOL} SOL`);

  } catch (error) {
    console.error(`Error requesting airdrop for ${walletAddress}:`, error);
  }
}

// Replace with a Devnet wallet address you control
const myDevnetWallet = 'REPLACE_WITH_YOUR_DEVNET_WALLET_ADDRESS'; 
// Example: const myDevnetWallet = new Keypair().publicKey.toBase58(); // For a new temporary wallet

if (myDevnetWallet === 'REPLACE_WITH_YOUR_DEVNET_WALLET_ADDRESS') {
  console.warn("Please replace 'REPLACE_WITH_YOUR_DEVNET_WALLET_ADDRESS' with an actual Devnet wallet address to run the example.");
} else {
  // getAirdrop(myDevnetWallet);
  console.log("Uncomment the line above and replace the placeholder to run the airdrop example.");
}