- const { blockhash, feeCalculator } = await connection.getRecentBlockhash();
+ const { blockhash, lastValidBlockHeight } = await connection.getLatestBlockhash();

// Eski yöntem
const fee = feeCalculator.lamportsPerSignature * numSignatures;

// Yeni yöntem
const fee = await connection.getFeeForMessage(message);

curl https://fra.rpc.orbitflare.com?api_key=YOUR-API-KEY -X POST -H "Content-Type: application/json" -d '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getRecentBlockhash",
  "params": []
}'

import { Connection } from '@solana/web3.js';

const connection = new Connection('https://fra.rpc.orbitflare.com?api_key=YOUR-API-KEY');

// Get recent blockhash (deprecated)
const { value: { blockhash, feeCalculator } } = await connection.getRecentBlockhash();
console.log('Blockhash:', blockhash);
console.log('Fee per signature:', feeCalculator.lamportsPerSignature);