public static byte[] CreatePrivateKeyScript(Transaction tx, int inputIndex, byte hashType, ECPrivateKeyParameters privateKey, ECPublicKeyParameters publicKey)
{
//TODO
var scriptEngine = new ScriptEngine();
var publicAddress = CreatePublicAddress(publicKey);
var publicKeyScript = CreatePublicKeyScript(publicAddress);
var txSignature = scriptEngine.TxSignature(publicKeyScript.ToImmutableArray(), tx, inputIndex, hashType);
var txSignatureHash = Crypto.DoubleSHA256(txSignature);
//Debug.WriteLine("Signing Tx: {0}".Format2(txSignature.ToHexDataString()));
//Debug.WriteLine("Signing Tx Hash: {0}".Format2(txSignatureHash.ToHexDataString()));
var signer = new ECDsaSigner();
signer.Init(forSigning: true, parameters: privateKey);
var signature = signer.GenerateSignature(txSignatureHash);
var r = signature[0];
var s = signature[1];
byte[] sigEncoded;
using (var stream = new MemoryStream())
{
using (var asn1Stream = new Asn1OutputStream(stream))
{
asn1Stream.WriteObject(new DerSequence(new DerInteger(r), new DerInteger(s)));
}
sigEncoded = stream.ToArray().Concat(hashType);
}
//Debug.WriteLine("Sig R: {0}".Format2(r.ToHexNumberStringUnsigned()));
//Debug.WriteLine("Sig S: {0}".Format2(s.ToHexNumberStringUnsigned()));
//Debug.WriteLine("Sig Encoded: {0}".Format2(sigEncoded.ToHexDataString()));
var privateKeyScript = new ScriptBuilder();
privateKeyScript.WritePushData(sigEncoded);
privateKeyScript.WritePushData(publicAddress);
//Debug.WriteLine("Private Script: {0}".Format2(privateKeyScript.GetScript().ToHexDataString()));
return privateKeyScript.GetScript();
}
public static byte[] CreatePublicKeyScript(byte[] publicAddress)
{
var publicAddressHash = Crypto.SingleRIPEMD160(Crypto.SingleSHA256(publicAddress));
var publicKeyScript = new ScriptBuilder();
publicKeyScript.WriteOp(ScriptOp.OP_DUP);
publicKeyScript.WriteOp(ScriptOp.OP_HASH160);
publicKeyScript.WritePushData(publicAddressHash);
publicKeyScript.WriteOp(ScriptOp.OP_EQUALVERIFY);
publicKeyScript.WriteOp(ScriptOp.OP_CHECKSIG);
//Debug.WriteLine("Public Script: {0}".Format2(publicKeyScript.GetScript().ToHexDataString()));
return publicKeyScript.GetScript();
}
