public void SignHashTest()
{
var a = 1056;
var hashOfa = HashingHelper.HashObject(a);
var rsa = RSA.Create();
var key = rsa.ExportParameters(true);
byte[] signature = DigitalSignatureHelper.SignHash(hashOfa, key);
var ok = DigitalSignatureHelper.VerifySignedHash(hashOfa, signature, key);
Assert.True(ok);
}
public void AddTransaction(SycoinTransactionContent transactionContent, string privateKey)
{
#region Verify transaction input and output
// Input UTXO check
transactionContent.Input.All(input =>
{
var UTXOInfo = UTXOManager.GetUTXOInfo(input.TransactionHash, input.PrevOutputIndex);
if (UTXOInfo != null)
{
throw new Exceptions.NonUTXOException(input);
}
return(true);
});
var allInputTransactions = DataProvider.GetTransactions(transactionContent.Input.Select(i => i.TransactionHash));
#region Output validation
var inputAmount = transactionContent.Input.Select(input =>
{
var prev_trans = allInputTransactions.FirstOrDefault(x => x.Hash == input.TransactionHash);
var prev_output = prev_trans.Content.Outputs.ElementAt(input.PrevOutputIndex);
return(prev_output.Amount);
}).Sum();
var outputAmount = transactionContent.Outputs.Sum(output => output.Amount);
if (inputAmount < outputAmount)
{
throw new Exceptions.InputNotEnoughTokenException();
}
#endregion
#endregion
var contentHash = HashingHelper.HashObject(transactionContent);
var rsa = RSAHelper.CreateRsaProviderFromPrivateKey(privateKey);
var publicKey = RSAHelper.ExportPublicKeyToPEMFormat(rsa);
DataProvider.AddTransaction(new SyCoinTransaction()
{
Signature = HashingHelper.ByteArrayToHexDigit(DigitalSignatureHelper.SignHash(contentHash, rsa.ExportParameters(true))),
Hash = HashingHelper.ByteArrayToHexDigit(contentHash),
PublicKey = publicKey,
Content = transactionContent
});
}