CSharpToyBitcoinBlockchain/Block.cs at master · codemeit/CSharpToyBitcoinBlockchain · GitHub

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using System;
using System.Security.Cryptography;
using System.Text;

namespace CSharpToyBitcoinBlockchain
{
    class Block
    {
        public int Index { get; set; }
        public string PreviousHash { get; set; }
        public string Timestamp { get; set; }
        public string Data { get; set; }
        public string Hash { get; set; }

        int _salt;

        public Block(int index, string timestamp, string data, string previousHash = "")
        {
            this.Index = index;
            this.PreviousHash = previousHash;
            this.Timestamp = timestamp;
            this.Data = data;
            this.Hash = this.CalculateHash();
            this._salt = 0;
        }


        // Create the hash of the current block.
        public string CalculateHash()
        {
            var hash = SHA256_hash(this.Index + this.PreviousHash + this.Timestamp + this.Data + this._salt);

            return hash;
        }

        // This is how the mining works!
        public void Mine(int difficulty)
        {
            // You mined successfully if you found a hash with certain number of leading '0's
            // difficulty defines the number of '0's required
            // e.g. if difficulty is 2, if you found a hash like  00338500000x..., it means you mined it.
            while (this.Hash.Substring(0, difficulty) != new String('0', difficulty))
            {
                this._salt++;
                this.Hash = this.CalculateHash();
                Console.WriteLine("Mining:" + this.Hash);
            }

            Console.WriteLine("Block has been mined: " + this.Hash);
        }

        // Create a hash string from stirng
        static string SHA256_hash(string value)
        {
            var sb = new StringBuilder();

            using (SHA256 hash = SHA256Managed.Create())
            {
                var enc = Encoding.UTF8;
                var result = hash.ComputeHash(enc.GetBytes(value));

                foreach (var b in result)
                    sb.Append(b.ToString("x2"));
            }

            return sb.ToString();
        }
    }

}


   class Block
    {
        public int Index { get; set; }
        public string PreviousHash { get; set; }
        public string Timestamp { get; set; }
        public string Data { get; set; }
        public string Hash { get; set; }

        int _salt;

        public Block(int index, string timestamp, string data, string previousHash = "")
        {
            this.Index = index;
            this.PreviousHash = previousHash;
            this.Timestamp = timestamp;
            this.Data = data;
            this.Hash = this.CalculateHash();
            this._salt = 0;
        }


        // Create the hash of the current block.
        public string CalculateHash()
        {
            var hash = SHA256_hash(this.Index + this.PreviousHash + this.Timestamp + this.Data + this._salt);

            return hash;
        }

        // This is how the mining works!
        public void Mine(int difficulty)
        {
            // You mined successfully if you found a hash with certain number of leading '0's
            // difficulty defines the number of '0's required
            // e.g. if difficulty is 2, if you found a hash like  00338500000x..., it means you mined it.
            while (this.Hash.Substring(0, difficulty) != new String('0', difficulty))
            {
                this._salt++;
                this.Hash = this.CalculateHash();
                Console.WriteLine("Mining:" + this.Hash);
            }

            Console.WriteLine("Block has been mined: " + this.Hash);
        }

        // Create a hash string from stirng
        static string SHA256_hash(string value)
        {
            var sb = new StringBuilder();

            using (SHA256 hash = SHA256Managed.Create())
            {
                var enc = Encoding.UTF8;
                var result = hash.ComputeHash(enc.GetBytes(value));

                foreach (var b in result)
                    sb.Append(b.ToString("x2"));
            }

            return sb.ToString();
        }
    }