FrqSalah

static void Main(string[] args)
{
    var blockchain = new Blockchain();
    blockchain.AddBlock("Block 1");
    blockchain.AddBlock("Block 2");
    blockchain.AddBlock("Block 3");

    Console.WriteLine("Is blockchain valid? " + blockchain.IsValid());
    Console.WriteLine("Latest block: " + blockchain.GetLatestBlock().Data);
    Console.ReadKey();

FrqSalah

public class Blockchain
{
    public List<Block> Chain { get; set; }

    public Blockchain()
    {
        Chain = new List<Block> { new Block(0, DateTime.Now, "Genesis Block", "0") };
    }

    public void AddBlock(string data)

FrqSalah

public class Block
{
    public int Index { get; set; }
    public DateTime Timestamp { get; set; }
    public string Data { get; set; }
    public string PreviousHash { get; set; }
    public string Hash { get; set; }
    public Block(int index, DateTime timestamp, string data, string previousHash)
    {
        Index = index;

FrqSalah

using BitcoinRpc.Protocol;
using BitcoinRpc.Protocol.Methods;
using BitcoinRpc.Protocol.Models;

// Connect to the Bitcoin RPC
var rpc = new BitcoinRpcClient("http://user:password@127.0.0.1:8332/");

// Get the private key of the sender
var privateKey = "5J3mBbAH58CpQ3Y5RNJpUKPE62SQ5tfcvU2JpbnkeyhfsYB1Jcn";

FrqSalah

using BitcoinLib.Services.Coins.Bitcoin;
using BitcoinLib.Responses;
using BitcoinLib.Responses.Bases;
using BitcoinLib.Responses.Shared;

// Create an instance of the BitcoinService class
var bitcoinService = new BitcoinService();

// Get the private key of the sender
var privateKey = "5J3mBbAH58CpQ3Y5RNJpUKPE62SQ5tfcvU2JpbnkeyhfsYB1Jcn";

FrqSalah

using NBitcoin;
using NBitcoin.Protocol;
using NBitcoin.Protocol.Behaviors;

// Create a private key for the sender
var privateKey = new Key();

// Get the public address from the private key
var fromAddress = privateKey.PubKey.GetAddress(Network.TestNet);
Console.WriteLine("Sender address: " + fromAddress);

FrqSalah

public class Solution {
    public ListNode ReverseList(ListNode head) {
        
        ListNode curr = head;
        ListNode prev = null;
        ListNode temp = null;

        while(curr != null)
        {
            temp = curr.next; // next value