getFirstAvailableBlock 사용 방법

curl https://mainnet.helius-rpc.com/?api-key=<api-key> -X POST -H "Content-Type: application/json" -d \
  '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getFirstAvailableBlock"
  }'

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

async function logFirstAvailableBlock() {
  const connection = new Connection('https://mainnet.helius-rpc.com/?api-key=<api-key>');
  try {
    const firstAvailableBlock = await connection.getFirstAvailableBlock();
    console.log(`First Available Block Slot: ${firstAvailableBlock}`);
  } catch (error) {
    console.error('Error fetching first available block:', error);
  }
}

logFirstAvailableBlock();