static void Main(string[] args)
{
KeyVaultClient kvc = new KeyVaultClient(new KeyVaultClient.AuthenticationCallback(GetToken));
var signer = new AzureKeyVaultExternalSigner(kvc, URI);
var publicKey = signer.GetPublicKeyAsync().Result;
System.Console.WriteLine(publicKey.ToHex());
var msgHash = new Util.Sha3Keccack().CalculateHash("Hello").HexToByteArray();
var ethExternalSigner = new EthECKeyExternalSigner(signer);
var signature = ethExternalSigner.SignAndCalculateVAsync(msgHash).Result;
var publicKeyRecovered = EthECKey.RecoverFromSignature(signature, msgHash);
System.Console.WriteLine(publicKeyRecovered.GetPubKey().ToHex());
var transfer = new TransferFunction();
transfer.To = "0x1996a57077877D38e18A1BE44A55100D77b8fA1D";
transfer.FromAddress = publicKeyRecovered.GetPublicAddress();
transfer.Value = 1;
transfer.Nonce = 1;
transfer.GasPrice = 100;
transfer.Gas = 1000;
var rpcClient = new RpcClient(new Uri("http://localhost:8545"));
var transactionInput = transfer.CreateTransactionInput("0x12890d2cce102216644c59daE5baed380d84830c");
var externalAccount = new ExternalAccount(ethExternalSigner, 1);
externalAccount.InitialiseAsync().Wait();
externalAccount.InitialiseDefaultTransactionManager(rpcClient);
var signature2 = externalAccount.TransactionManager.SignTransactionAsync(transactionInput).Result;
var transactionSigner = new TransactionSigner();
var publicKeyRecovered2 = transactionSigner.GetPublicKey(signature2, 1);
System.Console.WriteLine(publicKeyRecovered2.ToHex());
System.Console.ReadLine();
}