protected override bool CheckScriptSigCore(Script scriptSig, Op[] scriptSigOps, Script scriptPubKey, Op[] scriptPubKeyOps)
{
var ops = scriptSigOps;
if (ops.Length == 0)
{
return(false);
}
if (!scriptSig.IsPushOnly)
{
return(false);
}
if (scriptPubKey != null)
{
var expectedHash = ExtractScriptPubKeyParameters(scriptPubKey);
if (expectedHash == null)
{
return(false);
}
if (expectedHash != Script.FromBytesUnsafe(ops[ops.Length - 1].PushData).Hash)
{
return(false);
}
}
var redeemBytes = ops[ops.Length - 1].PushData;
if (redeemBytes.Length > 520)
{
return(false);
}
return(Script.FromBytesUnsafe(ops[ops.Length - 1].PushData).IsValid);
}
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);
}
return(new PayToScriptHashSigParameters(Script.FromBytesUnsafe(ops[ops.Length - 1].PushData), ops.Take(ops.Length - 1).Select(o => o.PushData).ToArray()));
}
public PayToScriptHashSigParameters ExtractScriptSigParameters(Network network, Script scriptSig, Script scriptPubKey)
{
Op[] ops = scriptSig.ToOps().ToArray();
Op[] ops2 = scriptPubKey == null ? null : scriptPubKey.ToOps().ToArray();
if (!CheckScriptSigCore(network, scriptSig, ops, scriptPubKey, ops2))
{
return(null);
}
var 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 Script ReadWrite(Script data)
{
if (this.Serializing)
{
var bytes = data == null?Script.Empty.ToBytes(true) : data.ToBytes(true);
ReadWriteAsVarString(ref bytes);
return(data);
}
var varString = new VarString();
varString.ReadWrite(this);
return(Script.FromBytesUnsafe(varString.GetString(true)));
}
public Script ReadWrite(Script data)
{
if (Serializing)
{
var bytes = data == null?Script.Empty.ToBytes(true) : data.ToBytes(true);
ReadWriteAsVarString(ref bytes);
return(data);
}
else
{
byte[] bytes = null;
VarString.StaticRead(this, ref bytes);
return(Script.FromBytesUnsafe(bytes));
}
}
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;
}
}
internal PSBTInput(BitcoinStream stream, PSBT parent, uint index, TxIn input) : base(parent)
{
TxIn = input;
Index = index;
originalScriptSig = TxIn.ScriptSig ?? Script.Empty;
originalWitScript = TxIn.WitScript ?? WitScript.Empty;
byte[] k = new byte[0];
byte[] v = new byte[0];
try
{
stream.ReadWriteAsVarString(ref k);
}
catch (EndOfStreamException e)
{
throw new FormatException("Invalid PSBTInput. Failed to Parse key.", e);
}
while (k.Length != 0)
{
try
{
stream.ReadWriteAsVarString(ref v);
}
catch (EndOfStreamException e)
{
throw new FormatException("Invalid PSBTInput. Failed to parse key.", e);
}
switch (k.First())
{
case PSBTConstants.PSBT_IN_NON_WITNESS_UTXO:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTInput. Contains illegal value in key for NonWitnessUTXO");
}
if (non_witness_utxo != null)
{
throw new FormatException("Invalid PSBTInput. Duplicate non_witness_utxo");
}
non_witness_utxo = this.GetConsensusFactory().CreateTransaction();
non_witness_utxo.FromBytes(v);
break;
case PSBTConstants.PSBT_IN_WITNESS_UTXO:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTInput. Contains illegal value in key for WitnessUTXO");
}
if (witness_utxo != null)
{
throw new FormatException("Invalid PSBTInput. Duplicate witness_utxo");
}
if (this.GetConsensusFactory().TryCreateNew <TxOut>(out var txout))
{
witness_utxo = txout;
}
else
{
witness_utxo = new TxOut();
}
witness_utxo.FromBytes(v);
break;
case PSBTConstants.PSBT_IN_PARTIAL_SIG:
var pubkey = new PubKey(k.Skip(1).ToArray());
if (partial_sigs.ContainsKey(pubkey))
{
throw new FormatException("Invalid PSBTInput. Duplicate key for partial_sigs");
}
partial_sigs.Add(pubkey, new TransactionSignature(v));
break;
case PSBTConstants.PSBT_IN_SIGHASH:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTInput. Contains illegal value in key for SigHash type");
}
if (!(sighash_type is null))
{
throw new FormatException("Invalid PSBTInput. Duplicate key for sighash_type");
}
if (v.Length != 4)
{
throw new FormatException("Invalid PSBTInput. SigHash Type is not 4 byte");
}
var value = Utils.ToUInt32(v, 0, true);
if (!Enum.IsDefined(typeof(SigHash), value))
{
throw new FormatException($"Invalid PSBTInput Unknown SigHash Type {value}");
}
sighash_type = (SigHash)value;
break;
case PSBTConstants.PSBT_IN_REDEEMSCRIPT:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTInput. Contains illegal value in key for redeem script");
}
if (redeem_script != null)
{
throw new FormatException("Invalid PSBTInput. Duplicate key for redeem_script");
}
redeem_script = Script.FromBytesUnsafe(v);
break;
case PSBTConstants.PSBT_IN_WITNESSSCRIPT:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTInput. Contains illegal value in key for witness script");
}
if (witness_script != null)
{
throw new FormatException("Invalid PSBTInput. Duplicate key for redeem_script");
}
witness_script = Script.FromBytesUnsafe(v);
break;
case PSBTConstants.PSBT_IN_BIP32_DERIVATION:
var pubkey2 = new PubKey(k.Skip(1).ToArray());
if (hd_keypaths.ContainsKey(pubkey2))
{
throw new FormatException("Invalid PSBTInput. Duplicate key for hd_keypaths");
}
var masterFingerPrint = new HDFingerprint(v.Take(4).ToArray());
KeyPath path = KeyPath.FromBytes(v.Skip(4).ToArray());
hd_keypaths.Add(pubkey2, new RootedKeyPath(masterFingerPrint, path));
break;
case PSBTConstants.PSBT_IN_SCRIPTSIG:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTInput. Contains illegal value in key for final scriptsig");
}
if (final_script_sig != null)
{
throw new FormatException("Invalid PSBTInput. Duplicate key for final_script_sig");
}
final_script_sig = Script.FromBytesUnsafe(v);
break;
case PSBTConstants.PSBT_IN_SCRIPTWITNESS:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTInput. Contains illegal value in key for final script witness");
}
if (final_script_witness != null)
{
throw new FormatException("Invalid PSBTInput. Duplicate key for final_script_witness");
}
final_script_witness = new WitScript(v);
break;
default:
if (unknown.ContainsKey(k))
{
throw new FormatException("Invalid PSBTInput. Duplicate key for unknown value");
}
unknown.Add(k, v);
break;
}
stream.ReadWriteAsVarString(ref k);
}
}
internal PSBTOutput(BitcoinStream stream, PSBT parent, uint index, TxOut txOut) : base(parent)
{
if (txOut == null)
{
throw new ArgumentNullException(nameof(txOut));
}
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
TxOut = txOut;
Index = index;
byte[] k = new byte[0];
byte[] v = new byte[0];
try
{
stream.ReadWriteAsVarString(ref k);
}
catch (EndOfStreamException e)
{
throw new FormatException("Invalid PSBTOutput. Could not read key", e);
}
while (k.Length != 0)
{
try
{
stream.ReadWriteAsVarString(ref v);
}
catch (EndOfStreamException e)
{
throw new FormatException("Invalid PSBTOutput. Could not read value", e);
}
switch (k.First())
{
case PSBTConstants.PSBT_OUT_REDEEMSCRIPT:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTOutput. Contains illegal value in key for redeem script");
}
if (redeem_script != null)
{
throw new FormatException("Invalid PSBTOutput, duplicate key for redeem_script");
}
redeem_script = Script.FromBytesUnsafe(v);
break;
case PSBTConstants.PSBT_OUT_WITNESSSCRIPT:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTOutput. Contains illegal value in key for witness script");
}
if (witness_script != null)
{
throw new FormatException("Invalid PSBTOutput, duplicate key for redeem_script");
}
witness_script = Script.FromBytesUnsafe(v);
break;
case PSBTConstants.PSBT_OUT_BIP32_DERIVATION:
var pubkey2 = new PubKey(k.Skip(1).ToArray());
if (hd_keypaths.ContainsKey(pubkey2))
{
throw new FormatException("Invalid PSBTOutput, duplicate key for hd_keypaths");
}
KeyPath path = KeyPath.FromBytes(v.Skip(4).ToArray());
hd_keypaths.Add(pubkey2, Tuple.Create(new HDFingerprint(v.Take(4).ToArray()), path));
break;
default:
if (unknown.ContainsKey(k))
{
throw new FormatException("Invalid PSBTInput, duplicate key for unknown value");
}
unknown.Add(k, v);
break;
}
stream.ReadWriteAsVarString(ref k);
}
}
internal PSBTOutput(BitcoinStream stream, PSBT parent, uint index, TxOut txOut) : base(parent)
{
if (txOut == null)
{
throw new ArgumentNullException(nameof(txOut));
}
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
TxOut = txOut;
Index = index;
byte[] k = new byte[0];
byte[] v = new byte[0];
try
{
stream.ReadWriteAsVarString(ref k);
}
catch (EndOfStreamException e)
{
throw new FormatException("Invalid PSBTOutput. Could not read key", e);
}
while (k.Length != 0)
{
try
{
stream.ReadWriteAsVarString(ref v);
}
catch (EndOfStreamException e)
{
throw new FormatException("Invalid PSBTOutput. Could not read value", e);
}
switch (k.First())
{
case PSBTConstants.PSBT_OUT_REDEEMSCRIPT:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTOutput. Contains illegal value in key for redeem script");
}
if (redeem_script != null)
{
throw new FormatException("Invalid PSBTOutput, duplicate key for redeem_script");
}
redeem_script = Script.FromBytesUnsafe(v);
break;
case PSBTConstants.PSBT_OUT_WITNESSSCRIPT:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTOutput. Unexpected key length for PSBT_OUT_BIP32_DERIVATION");
}
if (witness_script != null)
{
throw new FormatException("Invalid PSBTOutput, duplicate key for redeem_script");
}
witness_script = Script.FromBytesUnsafe(v);
break;
case PSBTConstants.PSBT_OUT_BIP32_DERIVATION:
var pubkey2 = new PubKey(k.Skip(1).ToArray());
if (hd_keypaths.ContainsKey(pubkey2))
{
throw new FormatException("Invalid PSBTOutput, duplicate key for hd_keypaths");
}
KeyPath path = KeyPath.FromBytes(v.Skip(4).ToArray());
hd_keypaths.Add(pubkey2, new RootedKeyPath(new HDFingerprint(v.Take(4).ToArray()), path));
break;
case PSBTConstants.PSBT_OUT_TAP_BIP32_DERIVATION:
var pubkey3 = new TaprootPubKey(k.Skip(1).ToArray());
if (hd_taprootkeypaths.ContainsKey(pubkey3))
{
throw new FormatException("Invalid PSBTOutput, duplicate key for hd_taproot_keypaths");
}
var bs = new BitcoinStream(v);
List <uint256> hashes = null !;
bs.ReadWrite(ref hashes);
var pos = (int)bs.Inner.Position;
KeyPath path2 = KeyPath.FromBytes(v.Skip(pos + 4).ToArray());
hd_taprootkeypaths.Add(pubkey3,
new TaprootKeyPath(
new RootedKeyPath(new HDFingerprint(v.Skip(pos).Take(4).ToArray()), path2),
hashes.ToArray()));
break;
case PSBTConstants.PSBT_OUT_TAP_INTERNAL_KEY:
if (k.Length != 1)
{
throw new FormatException("Invalid PSBTOutput. Contains illegal value in key for internal taproot pubkey");
}
if (!TaprootInternalPubKey.TryCreate(v, out var tpk))
{
throw new FormatException("Invalid PSBTOutput. Contains invalid internal taproot pubkey");
}
TaprootInternalKey = tpk;
break;
default:
if (unknown.ContainsKey(k))
{
throw new FormatException("Invalid PSBTInput, duplicate key for unknown value");
}
unknown.Add(k, v);
break;
}
stream.ReadWriteAsVarString(ref k);
}
}
