Cách sử dụng getBlocks

curl https://mainnet.helius-rpc.com/?api-key=<api-key> -X POST -H "Content-Type: application/json" -d \
  '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getBlocks",
    "params": [
      250000000,
      250000010
    ]
  }'

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

async function getBlocksInRange(startSlot, endSlot) {
  const connection = new Connection('https://mainnet.helius-rpc.com/?api-key=<api-key>');
  try {
    const blocks = await connection.getBlocks(startSlot, endSlot);
    console.log(`Confirmed blocks between slot ${startSlot} and ${endSlot}:`, blocks);
  } catch (error) {
    console.error('Error fetching blocks:', error);
  }
}

// Example usage:
const startSlot = 250000000;
const endSlot = 250000010;
getBlocksInRange(startSlot, endSlot);

curl https://mainnet.helius-rpc.com/?api-key=<api-key> -X POST -H "Content-Type: application/json" -d \
  '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getBlocks",
    "params": [
      260000000 
    ]
  }'

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

async function getBlocksFromStart(startSlot) {
  const connection = new Connection('https://mainnet.helius-rpc.com/?api-key=<api-key>');
  try {
    // The endSlot parameter is omitted to fetch up to the latest confirmed block
    const blocks = await connection.getBlocks(startSlot);
    console.log(`Confirmed blocks from slot ${startSlot} to latest:`, blocks);
    if (blocks.length > 0) {
      console.log(`Latest block in range: ${blocks[blocks.length - 1]}`);
    }
  } catch (error) {
    console.error('Error fetching blocks:', error);
  }
}

// Example usage (ensure this doesn't exceed the 500,000 slot limit from latest block):
const recentStartSlot = 260000000; 
getBlocksFromStart(recentStartSlot);

curl https://mainnet.helius-rpc.com/?api-key=<api-key> -X POST -H "Content-Type: application/json" -d \
  '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getBlocks",
    "params": [
      270000000,
      270000005,
      { "commitment": "confirmed" }
    ]
  }'

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

async function getBlocksWithCommitment(startSlot, endSlot) {
  const connection = new Connection('https://mainnet.helius-rpc.com/?api-key=<api-key>');
  try {
    const blocks = await connection.getBlocks(startSlot, endSlot, { commitment: 'confirmed' });
    console.log(`Confirmed blocks (with 'confirmed' commitment) between slot ${startSlot} and ${endSlot}:`, blocks);
  } catch (error) {
    console.error('Error fetching blocks with commitment:', error);
  }
}

// Example usage:
const commitStartSlot = 270000000;
const commitEndSlot = 270000005;
getBlocksWithCommitment(commitStartSlot, commitEndSlot);