protected override bool FastCheckScriptPubKey(Script scriptPubKey, out bool needMoreCheck)
{
needMoreCheck = false;
return
(scriptPubKey.Length > 3 &&
PubKey.Check(scriptPubKey.ToBytes(true), 1, scriptPubKey.Length - 2, false) &&
scriptPubKey.ToBytes(true)[scriptPubKey.Length - 1] == 0xac);
}
/// <summary>
/// Extract the public key or null from the script
/// </summary>
/// <param name="scriptPubKey"></param>
/// <param name="deepCheck">Whether deep checks are done on public key</param>
/// <returns>The public key</returns>
public PubKey ExtractScriptPubKeyParameters(Script scriptPubKey, bool deepCheck)
{
var result = ExtractScriptPubKeyParameters(scriptPubKey);
if (result == null || !deepCheck)
{
return(result);
}
return(PubKey.Check(result.ToBytes(true), true) ? result : null);
}
protected override bool CheckScriptSigCore(Script scriptSig, Op[] scriptSigOps, Script scriptPubKey, Op[] scriptPubKeyOps)
{
var ops = scriptSigOps;
if (ops.Length != 2)
{
return(false);
}
return(ops[0].PushData != null &&
((ops[0].Code == OpcodeType.OP_0) || TransactionSignature.IsValid(ops[0].PushData, ScriptVerify.None)) &&
ops[1].PushData != null && PubKey.Check(ops[1].PushData, false));
}
public PayToMultiSigTemplateParameters ExtractScriptPubKeyParameters(Script scriptPubKey)
{
bool needMoreCheck;
if (!FastCheckScriptPubKey(scriptPubKey, out needMoreCheck))
{
return(null);
}
var ops = scriptPubKey.ToOps().ToArray();
if (!CheckScriptPubKeyCore(scriptPubKey, ops))
{
return(null);
}
//already checked in CheckScriptPubKeyCore
var sigCount = ops[0].GetInt().Value;
var keyCount = ops[ops.Length - 2].GetInt().Value;
List <PubKey> keys = new List <PubKey>();
List <byte[]> invalidKeys = new List <byte[]>();
for (int i = 1; i < keyCount + 1; i++)
{
if (!PubKey.Check(ops[i].PushData, false))
{
invalidKeys.Add(ops[i].PushData);
}
else
{
try
{
keys.Add(new PubKey(ops[i].PushData));
}
catch (FormatException)
{
invalidKeys.Add(ops[i].PushData);
}
}
}
return(new PayToMultiSigTemplateParameters()
{
SignatureCount = sigCount,
PubKeys = keys.ToArray(),
InvalidPubKeys = invalidKeys.ToArray()
});
}
private bool CheckWitScriptCore(WitScript witScript)
{
return(witScript.PushCount == 2 &&
((witScript[0].Length == 1 && witScript[0][0] == 0) || (TransactionSignature.IsValid(witScript[0], ScriptVerify.None))) &&
PubKey.Check(witScript[1], false));
}