static void Main(string[] args)
{
UserKeys keys = new UserKeys();
Console.WriteLine("Public Key: " + keys.PublicKey);
Console.WriteLine("Private Key: " + keys.PrivateKey + "\n\n");
BlockChain chain = new BlockChain();
Console.WriteLine("BlockChain Created. \n\n");
Promise promise = new Promise("Any To Address", keys.PublicKey, "I promise to learn how blockchain works");
Console.WriteLine("Promise Created.");
EthECKey userPrivateKey = UserKeys.GetEthECKeyFromPrivateKey(keys.PrivateKey);
promise.SignPromise(userPrivateKey);
Console.WriteLine("Promise Signed.\n\n");
Block block = new Block(DateTime.Now.ToString(), promise, chain.GetLatestBlock().Hash);
Console.WriteLine("Block created.\n\n");
chain.AddBlock(block);
Console.WriteLine("Block added to chain.\n\n");
Console.WriteLine("Is the chain valid?: " + chain.IsChainValid());
}
public void SignPromise(EthECKey signingKey)
{
if (UserKeys.GetPublicKeyString(signingKey) != FromAddress)
{
throw new Exception("You cannot sign someone else's transaction.");
}
string promiseHash = CalculateHash();
byte[] msgBytes = Encoding.UTF8.GetBytes(promiseHash);
byte[] msgHash = new Sha3Keccack().CalculateHash(msgBytes);
Signature = signingKey.SignAndCalculateV(msgHash);
}