eth_getBlockTransactionCountByNumber | Arbitrum

const ethers = require('ethers');
const NODE_URL = "CHAINSTACK_NODE_URL";
const provider = new ethers.JsonRpcProvider(NODE_URL);

async function retrieveTransactionCounts() {
    // Get the current block number
    const currentBlockNumber = await provider.getBlockNumber();
  
    // Calculate the block number from one hour ago
    const oneHourAgoBlockNumber = currentBlockNumber - 12000; // 1200/blocks/hr on average on the Arbitrum mainnet
  
    // Initialize a variable to store the total number of transactions
    let totalTransactionCount = 0;
  
    // Loop through all blocks from the current block number to the block number from one hour ago
    for (let block = currentBlockNumber; block > oneHourAgoBlockNumber; block--) {
  
      // Get the number of transactions in this block
      const transactionCount = await provider.send("eth_getBlockTransactionCountByNumber", [block]);

      // Make the necessery conversions from hex to decimal
      const stringCount = BigInt(transactionCount).toString();
      const decimalCount = Number(stringCount)

      // Add the number of transactions in this block to the total
      totalTransactionCount += decimalCount;

      const stringBlock = BigInt(block).toString();
      const decimalBlock = Number(stringBlock)
      console.log(`Block ${decimalBlock} has ${decimalCount} transactions.`);
    }
  
    console.log(`The total number of transactions in the previous hour is: ${totalTransactionCount}`);
  }
  
  retrieveTransactionCounts();