public PayToTaprootScriptSigParameters?ExtractWitScriptParameters(WitScript witScript)
{
if (witScript == null)
{
throw new ArgumentNullException(nameof(witScript));
}
if (witScript.PushCount != 1 && witScript.PushCount != 2)
{
return(null);
}
var hasAnex = false;
if (witScript.PushCount == 2)
{
if (!CheckAnnex(witScript[1]))
{
return(null);
}
hasAnex = true;
}
if (!TaprootSignature.TryParse(witScript[0], out var sig))
{
return(null);
}
return(new PayToTaprootScriptSigParameters(sig, hasAnex ? witScript[1] : null)
{
TransactionSignature = sig,
Annex = hasAnex ? witScript[1] : null,
});
}
public WitScript GenerateWitScript(TaprootSignature signature)
{
if (signature == null)
{
throw new ArgumentNullException(nameof(signature));
}
return(new Script(Op.GetPushOp(signature.ToBytes())));
}
public PayToTaprootScriptSigParameters(TaprootSignature transactionSignature, byte[]?annex = null)
{
if (transactionSignature is null)
{
throw new ArgumentNullException(nameof(transactionSignature));
}
TransactionSignature = transactionSignature;
Annex = annex;
}
public static bool TryParse(byte[] bytes, [MaybeNullWhen(false)] out TaprootSignature signature)
{
if (bytes == null)
{
throw new ArgumentNullException(nameof(bytes));
}
#if HAS_SPAN
return(TryParse(bytes.AsSpan(), out signature));
#else
if (bytes.Length == 64)
{
if (!SchnorrSignature.TryParse(bytes, out var sig))
{
signature = null;
return(false);
}
signature = new TaprootSignature(sig);
return(true);
}
else if (bytes.Length == 65)
{
if (!TaprootExecutionData.IsValidSigHash(bytes[64]) || bytes[64] == 0)
{
signature = null;
return(false);
}
var sighash = (TaprootSigHash)bytes[64];
if (sighash == TaprootSigHash.Default)
{
signature = null;
return(false);
}
var buff = new byte[64];
Array.Copy(bytes, 0, buff, 0, 64);
if (!SchnorrSignature.TryParse(buff, out var sig))
{
signature = null;
return(false);
}
signature = new TaprootSignature(sig, sighash);
return(true);
}
else
{
signature = null;
return(false);
}
#endif
}
public WitScript GenerateWitScript(TaprootSignature signature, byte[] annex)
{
if (signature == null)
{
throw new ArgumentNullException(nameof(signature));
}
if (annex == null)
{
return(GenerateWitScript(signature));
}
if (!CheckAnnex(annex))
{
throw new ArgumentException("The first byte of annex must be 0x50", "annex");
}
return(new Script(Op.GetPushOp(signature.ToBytes()), Op.GetPushOp(annex)));
}
public static bool TryParse(string hex, [MaybeNullWhen(false)] out TaprootSignature signature)
{
if (hex == null)
{
throw new ArgumentNullException(nameof(hex));
}
try
{
var bytes = Encoders.Hex.DecodeData(hex);
if (TryParse(bytes, out signature))
{
return(true);
}
signature = null;
return(false);
}
catch (FormatException)
{
signature = null;
return(false);
}
}
public static bool TryParse(ReadOnlySpan <byte> bytes, [MaybeNullWhen(false)] out TaprootSignature signature)
{
if (bytes.Length == 64)
{
if (!SchnorrSignature.TryParse(bytes, out var sig))
{
signature = null;
return(false);
}
signature = new TaprootSignature(sig);
return(true);
}
else if (bytes.Length == 65)
{
if (!TaprootExecutionData.IsValidSigHash(bytes[64]))
{
signature = null;
return(false);
}
var sighash = (TaprootSigHash)bytes[64];
if (sighash == TaprootSigHash.Default)
{
signature = null;
return(false);
}
if (!SchnorrSignature.TryParse(bytes.Slice(0, 64), out var sig))
{
signature = null;
return(false);
}
signature = new TaprootSignature(sig, sighash);
return(true);
}
else
{
signature = null;
return(false);
}
}
public Script GenerateScriptSig(TaprootSignature signature)
{
return(GenerateWitScript(signature));
}