week one final - web3

1. Write a script to interact with an Ethereum account on mainnet , return its balance and transaction count.

import { ethers } from 'ethers';

async function getBalanceAndTransactionCount(address: string) {
    try {
        // Create a default provider for mainnet
        const provider = ethers.getDefaultProvider('mainnet');

        // Get the balance of the Ethereum address
        const balance = await provider.getBalance(address);
        console.log('Balance:', ethers.utils.formatEther(balance), 'ETH');

        // Get the transaction count (number of transactions) of the Ethereum address
        const transactionCount = await provider.getTransactionCount(address);
        console.log('Transaction Count:', transactionCount);
    } catch (error) {
        console.error('Error:', error);
    }
}

// Replace 'YOUR_ETHEREUM_ADDRESS' with the actual Ethereum address you want to query
const ethereumAddress = 'YOUR_ETHEREUM_ADDRESS';
getBalanceAndTransactionCount(ethereumAddress);

2. Given the addresses below:
0x57f1887a8BF19b14fC0dF6Fd9B2acc9Af147eA85
0xf4bfaf916a68b0fC859D63a319034C0f72A88a5C
0x3b138FC7eC06B2A44565994CfDe5134A75915995

write a script to determine the account type of the address.


function checkAccountType(address: string) {
   const provider = ethers.getDefaultProvider('mainnet');
   console.log(provider);

   const code = await provider.getCode(address);

   if (code === '0x') {
     console.log(`${address} is an Externally Owned Account (EOA).`);
   } else {
     console.log(`${address} is a Contract Account.`);
   }
}

const addressesToCheck = [
    '0x57f1887a8BF19b14fC0dF6Fd9B2acc9Af147eA85',
    '0xf4bfaf916a68b0fC859D63a319034C0f72A88a5C',
    '0x3b138FC7eC06B2A44565994CfDe5134A75915995'
];

addressesToCheck.forEach(address => {
    checkAccountType(address);
});