internal TxOut orphanTxOut = null; // When this input is not segwit, but we don't have the previous tx
internal PSBTInput(PSBT parent, uint index, TxIn input) : base(parent)
{
TxIn = input;
Index = index;
originalScriptSig = TxIn.ScriptSig ?? Script.Empty;
originalWitScript = TxIn.WitScript ?? WitScript.Empty;
}
/// <summary>
/// Adds a witness stack to the list of elements that will be used for building the filter.
/// </summary>
/// <param name="witScript">The witScript.</param>
/// <returns>The updated filter builder instance.</returns>
public void AddWitness(WitScript witScript)
{
if (witScript == null)
{
throw new ArgumentNullException(nameof(witScript));
}
AddEntries(witScript.Pushes);
}
public override bool Equals(object obj)
{
WitScript item = obj as WitScript;
if (item == null)
{
return(false);
}
return(EqualsCore(item));
}
public PayToWitPubkeyHashScriptSigParameters?ExtractWitScriptParameters(WitScript witScript)
{
if (!CheckWitScriptCore(witScript))
{
return(null);
}
if (PubKey.TryCreatePubKey(witScript[1], out var pk))
{
return(new PayToWitPubkeyHashScriptSigParameters((witScript[0].Length == 0) ? null : new TransactionSignature(witScript[0]), pk));
}
return(null);
}
private bool EqualsCore(WitScript item)
{
if (_Pushes.Length != item._Pushes.Length)
{
return(false);
}
for (int i = 0; i < _Pushes.Length; i++)
{
if (!Utils.ArrayEqual(_Pushes[i], item._Pushes[i]))
{
return(false);
}
}
return(true);
}
/// <summary>
/// Extract witness redeem from WitScript
/// </summary>
/// <param name="witScript">Witscript to extract information from</param>
/// <param name="expectedScriptId">Expected redeem hash</param>
/// <returns>The witness redeem</returns>
public Script ExtractWitScriptParameters(WitScript witScript, WitScriptId expectedScriptId)
{
if (witScript.PushCount == 0)
{
return(null);
}
var last = witScript.GetUnsafePush(witScript.PushCount - 1);
Script redeem = new Script(last);
if (expectedScriptId != null)
{
if (expectedScriptId != redeem.WitHash)
{
return(null);
}
}
return(redeem);
}
public PayToWitPubkeyHashScriptSigParameters ExtractWitScriptParameters(WitScript witScript)
{
if (!CheckWitScriptCore(witScript))
{
return(null);
}
try
{
return(new PayToWitPubkeyHashScriptSigParameters()
{
TransactionSignature = (witScript[0].Length == 1 && witScript[0][0] == 0) ? null : new TransactionSignature(witScript[0]),
PublicKey = new PubKey(witScript[1], true),
});
}
catch (FormatException)
{
return(null);
}
}
internal void Combine(PSBTInput other)
{
if (this.IsFinalized())
{
return;
}
foreach (var uk in other.unknown)
{
unknown.TryAdd(uk.Key, uk.Value);
}
if (other.final_script_sig != null)
{
final_script_sig = other.final_script_sig;
}
if (other.final_script_witness != null)
{
final_script_witness = other.final_script_witness;
}
if (IsFinalized())
{
ClearForFinalize();
return;
}
if (non_witness_utxo == null && other.non_witness_utxo != null)
{
non_witness_utxo = other.non_witness_utxo;
}
if (witness_utxo == null && other.witness_utxo != null)
{
non_witness_utxo = other.non_witness_utxo;
}
if (sighash_type == 0 && other.sighash_type > 0)
{
sighash_type = other.sighash_type;
}
if (redeem_script == null && other.redeem_script != null)
{
redeem_script = other.redeem_script;
}
if (witness_script == null && other.witness_script != null)
{
witness_script = other.witness_script;
}
foreach (var sig in other.partial_sigs)
{
partial_sigs.TryAdd(sig.Key, sig.Value);
}
foreach (var keyPath in other.hd_keypaths)
{
hd_keypaths.TryAdd(keyPath.Key, keyPath.Value);
}
}
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);
}
}
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));
}
/// <summary>
/// Import informations contained by <paramref name="other"/> into this instance.
/// </summary>
/// <param name="other"></param>
public void UpdateFrom(PSBTInput other)
{
if (other == null)
{
throw new ArgumentNullException(nameof(other));
}
foreach (var uk in other.unknown)
{
unknown.TryAdd(uk.Key, uk.Value);
}
if (other.final_script_sig != null)
{
final_script_sig = other.final_script_sig;
}
if (other.final_script_witness != null)
{
final_script_witness = other.final_script_witness;
}
if (non_witness_utxo == null && other.non_witness_utxo != null)
{
non_witness_utxo = other.non_witness_utxo;
}
if (witness_utxo == null && other.witness_utxo != null)
{
witness_utxo = other.witness_utxo;
}
if (sighash_type == 0 && other.sighash_type > 0)
{
sighash_type = other.sighash_type;
}
if (redeem_script == null && other.redeem_script != null)
{
redeem_script = other.redeem_script;
}
if (witness_script == null && other.witness_script != null)
{
witness_script = other.witness_script;
}
foreach (var sig in other.partial_sigs)
{
partial_sigs.TryAdd(sig.Key, sig.Value);
}
foreach (var keyPath in other.hd_keypaths)
{
hd_keypaths.TryAdd(keyPath.Key, keyPath.Value);
}
if (IsFinalized())
{
ClearForFinalize();
}
}