private static void PrintCoinRequest(CoinRequest coinRequest)
{
Console.WriteLine("MESSAGE TO BE SIGNED BY THE BANK:");
Console.WriteLine("");
Console.WriteLine(Base64.ToBase64String(coinRequest.GetMessage()));
Console.WriteLine("");
}
static void Main(string[] args)
{
Blinding.CanVerifyBlind();
// Create a "protocoin" using the bank's public key. The protocoin
// contains an internal blinding factor that is used to blind the
// message to be signed by the bank.
Protocoin protocoin = new Protocoin(bank.GetPublic());
// Generate a coin request.
CoinRequest coinRequest = protocoin.GenerateCoinRequest();
PrintCoinRequest(coinRequest);
// Ask the bank to sign the coin request.
// Note: In practice the bank will be on a remote server and this will
// be an asynchronous operation. The bank will verify Alice's
// credentials and debit her account for every coin it issues.
// Needless to say, the connection to the bank would have to be over a
// secure channel.
byte[] signature = bank.Sign(coinRequest);
PrintBankSignature(signature);
// Create a new coin using the bank's signature.
Coin coin = protocoin.CreateCoin(signature);
PrintCoin(coin);
// The signature on the coin is different from the one the bank
// returned earlier (magic!). Will the bank accept the coin as valid?
// Let's see ...
bool valid = bank.Verify(coin);
if (valid)
{
// It should always print "OK"
Console.WriteLine("OK");
}
else
{
Console.WriteLine("Fail!");
}
Console.ReadKey();
}
