public override bool CheckScriptPubKey(Script scriptPubKey)
{
var ops = scriptPubKey.ToOps().ToArray();
if(ops.Length < 3)
return false;
var sigCount = ops[0];
if(!sigCount.IsSmallUInt)
return false;
var expectedKeyCount = 0;
var keyCountIndex = 0;
for(int i = 1 ; i < ops.Length ; i++)
{
if(ops[i].PushData == null)
return false;
if(!PubKey.IsValidSize(ops[i].PushData.Length))
{
keyCountIndex = i;
break;
}
expectedKeyCount++;
}
if(!ops[keyCountIndex].IsSmallUInt)
return false;
if(ops[keyCountIndex].GetValue() != expectedKeyCount)
return false;
return ops[keyCountIndex + 1].Code == OpcodeType.OP_CHECKMULTISIG &&
keyCountIndex + 1 == ops.Length - 1;
}
public byte[][] ExtractScriptPubKeyParameters(Script scriptPubKey)
{
if(!FastCheckScriptPubKey(scriptPubKey))
return null;
var ops = scriptPubKey.ToOps().ToArray();
if(!CheckScriptPubKeyCore(scriptPubKey, ops))
return null;
return ops.Skip(1).Select(o=>o.PushData).ToArray();
}
public byte[] ExtractScriptPubKeyParameters(Script scriptPubKey)
{
if(!FastCheckScriptPubKey(scriptPubKey))
return null;
var ops = scriptPubKey.ToOps().ToArray();
if(ops.Length != 2)
return null;
if(ops[1].PushData == null || ops[1].PushData.Length > MAX_OPRETURN_SIZE)
return null;
return ops[1].PushData;
}
public override bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
if(!scriptSig.IsPushOnly)
return false;
if(!CheckScriptPubKey(scriptPubKey))
return false;
var sigCountExpected = scriptPubKey.ToOps().First().GetValue();
var sigOps = scriptSig.ToOps().ToArray();
return sigOps[0].Code == OpcodeType.OP_0 ?
sigCountExpected == sigOps.Length - 1 : sigCountExpected == sigOps.Length;
}
public PubKey ExtractScriptPubKeyParameters(Script script)
{
var ops = script.ToOps().ToArray();
if (!CheckScriptPubKeyCore(script, ops))
{
return(null);
}
try
{
return(new PubKey(ops[0].PushData));
}
catch (FormatException)
{
return(null);
}
}
public WitProgramParameters ExtractScriptPubKeyParameters2(Network network, Script scriptPubKey)
{
if (!CheckScriptPubKey(scriptPubKey))
{
return(null);
}
Op[] ops = scriptPubKey.ToOps().ToArray();
if (ops.Length != 2 || ops[1].PushData == null)
{
return(null);
}
return(new WitProgramParameters()
{
Version = ops[0].Code,
Program = ops[1].PushData
});
}
public byte[][] ExtractScriptPubKeyParameters(Script scriptPubKey)
{
bool needMoreCheck;
if (!FastCheckScriptPubKey(scriptPubKey, out needMoreCheck))
{
return(null);
}
Op[] ops = scriptPubKey.ToOps().ToArray();
if (!CheckScriptPubKeyCore(scriptPubKey, ops))
{
return(null);
}
return(ops.Skip(1).Select(o => o.PushData).ToArray());
}
public TransactionSignature[] ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if (!CheckScriptSigCore(scriptSig, ops, null, null))
{
return(null);
}
try
{
return(ops.Skip(1).Select(i => new TransactionSignature(i.PushData)).ToArray());
}
catch (FormatException)
{
return(null);
}
}
public virtual bool CheckScriptPubKey(Script scriptPubKey)
{
if (scriptPubKey == null)
{
throw new ArgumentNullException("scriptPubKey");
}
bool needMoreCheck;
bool result = FastCheckScriptPubKey(scriptPubKey, out needMoreCheck);
if (needMoreCheck)
{
result &= CheckScriptPubKeyCore(scriptPubKey, scriptPubKey.ToOps().ToArray());
}
return(result);
}
public PayToMultiSigTemplateParameters ExtractScriptPubKeyParameters(Script scriptPubKey)
{
bool needMoreCheck;
if (!FastCheckScriptPubKey(scriptPubKey, out needMoreCheck))
{
return(null);
}
Op[] ops = scriptPubKey.ToOps().ToArray();
if (!CheckScriptPubKeyCore(scriptPubKey, ops))
{
return(null);
}
//already checked in CheckScriptPubKeyCore
int sigCount = ops[0].GetInt().Value;
int keyCount = ops[ops.Length - 2].GetInt().Value;
var keys = new List <PubKey>();
var 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()
});
}
public PayToMultiSigTemplateParameters ExtractScriptPubKeyParameters(Script scriptPubKey)
{
if (!FastCheckScriptPubKey(scriptPubKey))
{
return(null);
}
var ops = scriptPubKey.ToOps().ToArray();
if (!CheckScriptPubKeyCore(scriptPubKey, ops))
{
return(null);
}
var sigCount = (int)ops[0].GetValue();
var keyCount = (int)ops[ops.Length - 2].GetValue();
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()
});
}
public override bool CheckScriptPubKey(Script scriptPubKey)
{
var ops = scriptPubKey.ToOps().ToList();
if (ops.Count < 1)
{
return(false);
}
if (ops[0].Code != OpcodeType.OP_RETURN)
{
return(false);
}
if (ops.Count == 2)
{
return(ops[1].PushData != null && ops[1].PushData.Length <= 40);
}
return(true);
}
public PayToPubkeyHashScriptSigParameters ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if(!CheckScriptSigCore(scriptSig, ops, null, null))
return null;
try
{
return new PayToPubkeyHashScriptSigParameters()
{
TransactionSignature = ops[0].Code == OpcodeType.OP_0 ? null : new TransactionSignature(ops[0].PushData),
PublicKey = new PubKey(ops[1].PushData, true),
};
}
catch(FormatException)
{
return null;
}
}
public TransactionSignature ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if(!CheckScriptSigCore(scriptSig, ops, null, null))
return null;
var data = ops[0].PushData;
if(!TransactionSignature.ValidLength(data.Length))
return null;
try
{
return new TransactionSignature(data);
}
catch(FormatException)
{
return null;
}
}
public PayToPubkeyHashScriptSigParameters ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if (!CheckScriptSigCore(scriptSig, ops, null, null))
{
return(null);
}
if (PubKey.TryCreatePubKey(ops[1].PushData, out var pk))
{
return(new PayToPubkeyHashScriptSigParameters()
{
TransactionSignature = ops[0].Code == OpcodeType.OP_0 ? null : new TransactionSignature(ops[0].PushData),
PublicKey = pk,
});
}
return(null);
}
public byte[] ExtractScriptPubKeyParameters(Script scriptPubKey)
{
if (!FastCheckScriptPubKey(scriptPubKey))
{
return(null);
}
var ops = scriptPubKey.ToOps().ToArray();
if (ops.Length != 2)
{
return(null);
}
if (ops[1].PushData == null || ops[1].PushData.Length > MAX_OPRETURN_SIZE)
{
return(null);
}
return(ops[1].PushData);
}
public override bool CheckScriptPubKey(Script scriptPubKey)
{
var ops = scriptPubKey.ToOps().ToArray();
if (ops.Length < 3)
{
return(false);
}
var sigCount = ops[0];
if (!sigCount.IsSmallUInt)
{
return(false);
}
var expectedKeyCount = 0;
var keyCountIndex = 0;
for (int i = 1; i < ops.Length; i++)
{
if (ops[i].PushData == null)
{
return(false);
}
if (!PubKey.IsValidSize(ops[i].PushData.Length))
{
keyCountIndex = i;
break;
}
expectedKeyCount++;
}
if (!ops[keyCountIndex].IsSmallUInt)
{
return(false);
}
if (ops[keyCountIndex].GetValue() != expectedKeyCount)
{
return(false);
}
return(ops[keyCountIndex + 1].Code == OpcodeType.OP_CHECKMULTISIG &&
keyCountIndex + 1 == ops.Length - 1);
}
public override bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
var ops = scriptSig.ToOps().ToArray();
if (ops.Length == 0)
{
return(false);
}
if (!scriptSig.IsPushOnly)
{
return(false);
}
if (!VerifyRedeemScript)
{
return(true);
}
var redeemScript = new Script(ops.Last().PushData);
var template = StandardScripts.GetTemplateFromScriptPubKey(redeemScript);
return(template != null && template.Type != TxOutType.TX_SCRIPTHASH);
}
public PayToMultiSigTemplateParameters ExtractScriptPubKeyParameters(Script scriptPubKey, Network network)
{
bool needMoreCheck;
if (!FastCheckScriptPubKey(scriptPubKey, out needMoreCheck))
{
return(null);
}
Op[] ops = scriptPubKey.ToOps().ToArray();
if (!CheckScriptPubKeyCore(scriptPubKey, ops))
{
return(null);
}
byte[] federationId = ops[0].PushData;
(PubKey[] pubKeys, int signatureCount) = network.Federations.GetFederation(federationId).GetFederationDetails();
return(new PayToMultiSigTemplateParameters()
{
PubKeys = pubKeys, SignatureCount = signatureCount
});
}
public PayToPubkeyHashScriptSigParameters ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if (!CheckScriptSigCore(scriptSig, ops, null, null))
{
return(null);
}
try
{
return(new PayToPubkeyHashScriptSigParameters()
{
TransactionSignature = new TransactionSignature(ops[0].PushData),
PublicKey = new PubKey(ops[1].PushData),
});
}
catch (FormatException)
{
return(null);
}
}
public uint GetSigOpCount(Script scriptSig)
{
if (!IsPayToScriptHash)
{
return(GetSigOpCount(true));
}
// This is a pay-to-script-hash scriptPubKey;
// get the last item that the scriptSig
// pushes onto the stack:
var validSig = new PayToScriptHashTemplate()
{
VerifyRedeemScript = false
}.CheckScriptSig(scriptSig, null);
if (!validSig)
{
return(0);
}
/// ... and return its opcount:
return(new Script(scriptSig.ToOps().Last().PushData).GetSigOpCount(true));
}
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.TryCreatePubKey(ops[i].PushData, out var pk))
{
keys.Add(pk);
}
else
{
invalidKeys.Add(ops[i].PushData);
}
}
return(new PayToMultiSigTemplateParameters()
{
SignatureCount = sigCount,
PubKeys = keys.ToArray(),
InvalidPubKeys = invalidKeys.ToArray()
});
}
public TransactionSignature[] ExtractScriptSigParameters(Network network, Script scriptSig)
{
bool needMoreCheck;
if (!FastCheckScriptSig(scriptSig, null, out needMoreCheck))
{
return(null);
}
Op[] ops = scriptSig.ToOps().ToArray();
if (!CheckScriptSigCore(network, scriptSig, ops, null, null))
{
return(null);
}
try
{
return(ops.Skip(1).Select(i => i.Code == OpcodeType.OP_0 ? null : new TransactionSignature(i.PushData)).ToArray());
}
catch (FormatException)
{
return(null);
}
}
public TransactionSignature ExtractScriptSigParameters(Network network, Script scriptSig)
{
Op[] ops = scriptSig.ToOps().ToArray();
if (!CheckScriptSigCore(network, scriptSig, ops, null, null))
{
return(null);
}
byte[] data = ops[0].PushData;
if (!TransactionSignature.ValidLength(data.Length))
{
return(null);
}
try
{
return(new TransactionSignature(data));
}
catch (FormatException)
{
return(null);
}
}
/// <summary>
/// Adds a scriptSig to the list of elements that will be used for building the filter.
/// </summary>
/// <param name="scriptSig">The scriptSig.</param>
/// <returns>The updated filter builder instance.</returns>
public GolombRiceFilterBuilder AddScriptSig(Script scriptSig)
{
if (scriptSig == null)
{
throw new ArgumentNullException(nameof(scriptSig));
}
var data = new List <byte[]>();
foreach (var op in scriptSig.ToOps())
{
if (op.PushData != null)
{
data.Add(op.PushData);
}
else if (op.Code == OpcodeType.OP_0)
{
data.Add(new byte[0]);
}
}
AddEntries(data);
return(this);
}
public PayToScriptHashSigParameters ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if (!CheckScriptSigCore(scriptSig, ops, null, null))
{
return(null);
}
try
{
PayToScriptHashSigParameters result = new PayToScriptHashSigParameters();
result.Signatures =
ops
.Take(ops.Length - 1)
.Select(o => new TransactionSignature(o.PushData))
.ToArray();
result.RedeemScript = new Script(ops[ops.Length - 1].PushData);
return(result);
}
catch (Exception)
{
return(null);
}
}
public PayToScriptHashSigParameters ExtractScriptSigParameters(Script scriptSig, Script scriptPubKey)
{
var ops = scriptSig.ToOps().ToArray();
var ops2 = scriptPubKey == null ? null : scriptPubKey.ToOps().ToArray();
if(!CheckScriptSigCore(scriptSig, ops, scriptPubKey, ops2))
return null;
try
{
var multiSig = ops.Length > 0 && ops[0].Code == OpcodeType.OP_0;
PayToScriptHashSigParameters result = new PayToScriptHashSigParameters();
result.Signatures =
ops
.Skip(multiSig ? 1 : 0)
.Take(ops.Length - 1 - (multiSig ? 1 : 0))
.Select(o => o.Code == OpcodeType.OP_0 ? null : new TransactionSignature(o.PushData))
.ToArray();
result.RedeemScript = Script.FromBytesUnsafe(ops[ops.Length - 1].PushData);
return result;
}
catch(Exception)
{
return null;
}
}
public override bool CheckScriptPubKey(Script scriptPubKey)
{
if (scriptPubKey == null)
{
throw new ArgumentNullException("scriptPubKey");
}
var bytes = scriptPubKey.ToBytes(true);
if (bytes.Length < 2)
{
return(false);
}
var version = bytes[0];
if (!ValidSegwitVersion(version))
{
return(false);
}
var pushSize = bytes[1];
if (pushSize < 0x02)
{
return(false);
}
if (pushSize <= 0x4b)
{
return((1 + 1 + pushSize) == bytes.Length);
}
var ops = scriptPubKey.ToOps().ToArray();
if (ops.Length != 2)
{
return(false);
}
return(ops.All(o => o.PushData != null));
}
public TxDestination ExtractScriptPubKeyParameters(Network network, Script scriptPubKey)
{
if (!CheckScriptPubKey(scriptPubKey))
{
return(null);
}
Op[] ops = scriptPubKey.ToOps().ToArray();
if (ops.Length != 2 || ops[1].PushData == null)
{
return(null);
}
if (ops[0].Code == OpcodeType.OP_0)
{
if (ops[1].PushData.Length == 20)
{
return(new WitKeyId(ops[1].PushData));
}
if (ops[1].PushData.Length == 32)
{
return(new WitScriptId(ops[1].PushData));
}
}
return(null);
}
private string FindDestination(JObject transaction)
{
foreach (JObject output in transaction["outputs"])
{
ByteString script = ByteString.Parse((string)output["script"]);
Script parsedScript = new Script(script.ToByteArray());
Op firstOpCode = parsedScript.ToOps().FirstOrDefault();
if (parsedScript.ToOps() != null && firstOpCode.Code == OpcodeType.OP_RETURN)
{
foreach (Op opCode in parsedScript.ToOps())
{
if (opCode.PushData != null && opCode.PushData.Length >= 2 && !opCode.IsInvalid)
{
if (opCode.PushData[0] == 'O' && opCode.PushData[1] == 'G')
return Encoding.UTF8.GetString(opCode.PushData, 2, opCode.PushData.Length - 2);
}
}
}
}
return null;
}
public virtual bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
if (scriptSig == null)
{
throw new ArgumentNullException("scriptSig");
}
if (!FastCheckScriptSig(scriptSig, scriptPubKey))
{
return(false);
}
return(CheckScriptSigCore(scriptSig, scriptSig.ToOps().ToArray(), scriptPubKey, scriptPubKey == null ? null : scriptPubKey.ToOps().ToArray()));
}
public TransactionSignature ExtractScriptSigParameters(Script scriptSig)
{
if(!CheckScriptSig(scriptSig, null))
return null;
var data = scriptSig.ToOps().First().PushData;
if(!TransactionSignature.ValidLength(data.Length))
return null;
try
{
return new TransactionSignature(data);
}
catch(FormatException)
{
return null;
}
}
public TxDestination ExtractScriptPubKeyParameters(Script scriptPubKey)
{
if(!CheckScriptPubKey(scriptPubKey))
return null;
var ops = scriptPubKey.ToOps().ToArray();
if(ops.Length != 2 || ops[1].PushData == null)
return null;
if(ops[0].Code == OpcodeType.OP_0)
{
if(ops[1].PushData.Length == 20)
return new WitKeyId(ops[1].PushData);
if(ops[1].PushData.Length == 32)
return new WitScriptId(ops[1].PushData);
}
return null;
}
private static bool Fill(StealthMetadata output, Script metadata)
{
var ops = metadata.ToOps().ToArray();
if(ops.Length != 2 || ops[0].Code != OpcodeType.OP_RETURN)
return false;
var data = ops[1].PushData;
if(data == null || data.Length != 1 + 4 + 33)
return false;
MemoryStream ms = new MemoryStream(data);
output.Version = ms.ReadByte();
if(output.Version != 6)
return false;
output.Nonce = ms.ReadBytes(4);
output.EphemKey = new PubKey(ms.ReadBytes(33));
output.Script = metadata;
output.Hash = Hashes.Hash256(data);
var msprefix = new MemoryStream(output.Hash.ToBytes(false));
output.BitField = Utils.ToUInt32(msprefix.ReadBytes(4), true);
return true;
}
public TransactionSignature ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if(!CheckScriptSigCore(scriptSig, ops, null, null))
return null;
var data = ops[0].PushData;
if(!TransactionSignature.ValidLength(data.Length))
return null;
try
{
return new TransactionSignature(data);
}
catch(FormatException)
{
return null;
}
}
public virtual bool CheckScriptPubKey(Script scriptPubKey)
{
if(scriptPubKey == null)
throw new ArgumentNullException("scriptPubKey");
bool needMoreCheck;
bool result = FastCheckScriptPubKey(scriptPubKey, out needMoreCheck);
if(needMoreCheck)
{
result &= CheckScriptPubKeyCore(scriptPubKey, scriptPubKey.ToOps().ToArray());
}
return result;
}
public override bool CheckScriptPubKey(Script scriptPubKey)
{
var ops = scriptPubKey.ToOps().ToList();
if(ops.Count < 1)
return false;
if(ops[0].Code != OpcodeType.OP_RETURN)
return false;
if(ops.Count == 2)
{
return ops[1].PushData != null && ops[1].PushData.Length <= 40;
}
return true;
}
public TransactionSignature[] ExtractScriptSigParameters(Script scriptSig)
{
bool needMoreCheck;
if(!FastCheckScriptSig(scriptSig, null, out needMoreCheck))
return null;
var ops = scriptSig.ToOps().ToArray();
if(!CheckScriptSigCore(scriptSig, ops, null, null))
return null;
try
{
return ops.Skip(1).Select(i => i.Code == OpcodeType.OP_0 ? null : new TransactionSignature(i.PushData)).ToArray();
}
catch(FormatException)
{
return null;
}
}
public ScriptId ExtractScriptPubKeyParameters(Script scriptPubKey)
{
if(!this.CheckScriptPubKey(scriptPubKey))
return null;
return new ScriptId(scriptPubKey.ToOps().Skip(1).First().PushData);
}
public PayToScriptHashSigParameters ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if(!ops.All(o => o.PushData != null))
return null;
try
{
PayToScriptHashSigParameters result = new PayToScriptHashSigParameters();
result.Signatures =
ops
.Take(ops.Length - 1)
.Select(o => new TransactionSignature(o.PushData))
.ToArray();
result.Script = new Script(ops[ops.Length - 1].PushData);
return result;
}
catch(Exception)
{
return null;
}
}
public override bool CheckScriptPubKey(Script scriptPubKey)
{
var ops = scriptPubKey.ToOps().ToList();
if(ops.Count != 2)
return false;
return ops[0].PushData != null && PubKey.IsValidSize(ops[0].PushData.Length) &&
ops[1].Code == OpcodeType.OP_CHECKSIG;
}
public override bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
var ops = scriptSig.ToOps().ToArray();
if(ops.Length == 0)
return false;
if(!scriptSig.IsPushOnly)
return false;
if(!VerifyRedeemScript)
return true;
var redeemScript = new Script(ops.Last().PushData);
var template = StandardScripts.GetTemplateFromScriptPubKey(redeemScript);
return template != null && template.Type != TxOutType.TX_SCRIPTHASH;
}
public override bool CheckScriptPubKey(Script scriptPubKey)
{
var ops = scriptPubKey.ToOps().ToArray();
if(ops.Length != 3)
return false;
return ops[0].Code == OpcodeType.OP_HASH160 &&
ops[1].Code == (OpcodeType)0x14 &&
ops[2].Code == OpcodeType.OP_EQUAL;
}
public uint GetSigOpCount(Script scriptSig)
{
if(!IsPayToScriptHash)
return GetSigOpCount(true);
// This is a pay-to-script-hash scriptPubKey;
// get the last item that the scriptSig
// pushes onto the stack:
var validSig = new PayToScriptHashTemplate().CheckScriptSig(scriptSig, this);
return !validSig ? 0 : new Script(scriptSig.ToOps().Last().PushData).GetSigOpCount(true);
// ... and return its opcount:
}
public PayToPubkeyHashScriptSigParameters ExtractScriptSigParameters(Script scriptSig)
{
if(!CheckScriptSig(scriptSig))
return null;
var ops = scriptSig.ToOps().ToArray();
return new PayToPubkeyHashScriptSigParameters()
{
TransactionSignature = new TransactionSignature(ops[0].PushData),
PublicKey = new PubKey(ops[1].PushData),
};
}
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;
var sigCount = (int)ops[0].GetValue();
var keyCount = (int)ops[ops.Length - 2].GetValue();
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()
};
}
public PayToMultiSigTemplateParameters ExtractScriptPubKeyParameters(Script scriptPubKey)
{
if(!CheckScriptPubKey(scriptPubKey))
return null;
var ops = scriptPubKey.ToOps().ToArray();
var sigCount = (byte)ops[0].PushData[0];
List<PubKey> keys = new List<PubKey>();
for(int i = 1 ; i < ops.Length ; i++)
{
if(!PubKey.IsValidSize(ops[i].PushData.Length))
break;
keys.Add(new PubKey(ops[i].PushData));
}
return new PayToMultiSigTemplateParameters()
{
SignatureCount = sigCount,
PubKeys = keys.ToArray()
};
}
public PayToScriptHashSigParameters ExtractScriptSigParameters(Script scriptSig, Script scriptPubKey)
{
var ops = scriptSig.ToOps().ToArray();
var ops2 = scriptPubKey == null ? null : scriptPubKey.ToOps().ToArray();
if(!CheckScriptSigCore(scriptSig, ops, scriptPubKey, ops2))
return null;
PayToScriptHashSigParameters result = new PayToScriptHashSigParameters();
result.RedeemScript = Script.FromBytesUnsafe(ops[ops.Length - 1].PushData);
result.Pushes = ops.Take(ops.Length - 1).Select(o => o.PushData).ToArray();
return result;
}
public virtual bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
if (scriptSig == null)
{
throw new ArgumentNullException("scriptSig");
}
bool needMoreCheck;
var result = FastCheckScriptSig(scriptSig, scriptPubKey, out needMoreCheck);
if (needMoreCheck)
{
result &= CheckScriptSigCore(scriptSig, scriptSig.ToOps().ToArray(), scriptPubKey, scriptPubKey == null ? null : scriptPubKey.ToOps().ToArray());
}
return(result);
}
public PayToPubkeyHashScriptSigParameters ExtractScriptSigParameters(Script scriptSig)
{
var ops = scriptSig.ToOps().ToArray();
if(!CheckScriptSigCore(scriptSig, ops, null, null))
return null;
try
{
return new PayToPubkeyHashScriptSigParameters()
{
TransactionSignature = ops[0].Code == OpcodeType.OP_0 ? null : new TransactionSignature(ops[0].PushData),
PublicKey = new PubKey(ops[1].PushData, true),
};
}
catch(FormatException)
{
return null;
}
}
public KeyId ExtractScriptPubKeyParameters(Script script)
{
if(!CheckScriptPubKey(script))
return null;
return new KeyId(script.ToOps().Skip(2).First().PushData);
}
public virtual bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
if(scriptSig == null)
throw new ArgumentNullException("scriptSig");
bool needMoreCheck;
var result = FastCheckScriptSig(scriptSig, scriptPubKey, out needMoreCheck);
if(needMoreCheck)
{
result &= CheckScriptSigCore(scriptSig, scriptSig.ToOps().ToArray(), scriptPubKey, scriptPubKey == null ? null : scriptPubKey.ToOps().ToArray());
}
return result;
}
public override bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
var ops = scriptSig.ToOps().ToArray();
if(ops.Length != 2)
return false;
return ops[0].PushData != null &&
ops[1].PushData != null && PubKey.IsValidSize(ops[1].PushData.Length);
}
public WitProgramParameters ExtractScriptPubKeyParameters2(Script scriptPubKey)
{
if(!CheckScriptPubKey(scriptPubKey))
return null;
var ops = scriptPubKey.ToOps().ToArray();
if(ops.Length != 2 || ops[1].PushData == null)
return null;
return new WitProgramParameters()
{
Version = ops[0].Code,
Program = ops[1].PushData
};
}
public override bool CheckScriptPubKey(Script scriptPubKey)
{
var ops = scriptPubKey.ToOps().ToArray();
if(ops.Length != 5)
return false;
return ops[0].Code == OpcodeType.OP_DUP &&
ops[1].Code == OpcodeType.OP_HASH160 &&
ops[2].PushData != null && ops[2].PushData.Length == 0x14 &&
ops[3].Code == OpcodeType.OP_EQUALVERIFY &&
ops[4].Code == OpcodeType.OP_CHECKSIG;
}
public WantedSystemMessage GetWantedSystemMessage(Script scriptPubKey, RsaPrivateKey privateKey = null)
{
var msg = new WantedSystemMessage();
if (scriptPubKey.Length < 13)
{
throw new Exception("This ScriptPubKey is not a valid Wanted System message.");
}
Op[] scriptPubKeyOps = scriptPubKey.ToOps().ToArray();
if ((scriptPubKeyOps[0].Code != OpcodeType.OP_NOP) || (scriptPubKeyOps[1].Code != OpcodeType.OP_NOP) || (scriptPubKeyOps[2].Code != OpcodeType.OP_RETURN))
{
throw new Exception("This ScriptPubKey is not a valid Wanted System message.");
}
byte[] pd = scriptPubKeyOps[3].PushData;
byte[] header = pd.Take <byte>(3).ToArray();
msg.Version = pd[3];
if (msg.Version != 1)
{
throw new Exception($"Wanted System message vesion {msg.Version} is not supported.");
}
msg.Compression = (MessageCompression)pd[4];
if (msg.Compression != MessageCompression.GZip)
{
throw new Exception($"Wanted System message compression {msg.Compression} is not supported.");
}
msg.ChecksumType = (MessageChecksum)pd[5];
if (msg.ChecksumType != MessageChecksum.None)
{
throw new Exception($"Wanted System message checksum {msg.ChecksumType} is not supported.");
}
msg.Encryption = (MessageEncryption)pd[6];
if (msg.Encryption != MessageEncryption.RSA4096AES256)
{
throw new Exception($"Wanted System message encryption {msg.Encryption} is not supported.");
}
ushort encryptionKeyLength = BitConverter.ToUInt16(pd, 7);
ushort metadataLength = BitConverter.ToUInt16(pd, 9);
ushort messageLength = BitConverter.ToUInt16(pd, 11);
byte[] encryptionKey = new byte[encryptionKeyLength];
byte[] compressedMetadata = new byte[metadataLength];
byte[] compressedMessage = new byte[messageLength];
Array.Copy(pd, 13, encryptionKey, 0, encryptionKeyLength);
Array.Copy(pd, 13 + encryptionKeyLength, compressedMetadata, 0, metadataLength);
Array.Copy(pd, 13 + encryptionKeyLength + metadataLength, compressedMessage, 0, messageLength);
byte[] uncompressedMetadata = GZIPDecompressByteArray(compressedMetadata);
byte[] uncompressedMessage = GZIPDecompressByteArray(compressedMessage);
// process metadata using json serializer
string metadata = System.Text.Encoding.UTF8.GetString(uncompressedMetadata);
msg.Metadata = JsonConvert.DeserializeObject <WantedSystemMessageMetadata>(metadata);
// Decrypt the message if needed
if (msg.Encryption == MessageEncryption.RSA4096AES256)
{
if (privateKey == null)
{
throw new Exception("The message is encrypted but the decryption key was not provided.");
}
byte[] aesKey = null;
try
{
aesKey = RSADecryptByteArray(encryptionKey, privateKey);
}
catch
{
throw new Exception("The private key you provided isn't a match for the public key the message was encrypted with.");
}
uncompressedMessage = AESDecryptByteArray(uncompressedMessage, aesKey);
}
msg.Text = System.Text.Encoding.UTF8.GetString(uncompressedMessage);
return(msg);
}
public bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
if(scriptSig == null)
throw new ArgumentNullException("scriptSig");
if(!FastCheckScriptSig(scriptSig, scriptPubKey))
return false;
return CheckScriptSigCore(scriptSig, scriptSig.ToOps().ToArray(), scriptPubKey, scriptPubKey == null ? null : scriptPubKey.ToOps().ToArray());
}
public override bool CheckScriptSig(Script scriptSig, Script scriptPubKey)
{
var ops = scriptSig.ToOps().ToList();
if(ops.Count != 1)
return false;
return ops[0].PushData != null;
}
public PubKey ExtractScriptPubKeyParameters(Script script)
{
if(!CheckScriptPubKey(script))
return null;
return new PubKey(script.ToOps().ToArray()[0].PushData);
}