public bool VerifyScript(UInt256 blockHash, int txIndex, byte[] scriptPubKey, Transaction tx, int inputIndex, byte[] script)
{
if (logger.IsTraceEnabled)
logger.Trace(
@"++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Verifying script for block {0}, transaction {1}, input {2}
{3}
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
, blockHash, txIndex, inputIndex, script.ToArray().ToHexDataString());
Stack stack, altStack;
if (
ExecuteOps(scriptPubKey, tx, inputIndex, script, out stack, out altStack)
&& stack.Count == 1 && altStack.Count == 0)
{
var success = stack.PeekBool(); //TODO Pop? does it matter?
// Additional validation for spend-to-script-hash transactions:
//TODO
return success;
}
else
{
return false;
}
}
public void TestCalculateTransactionHash()
{
var expectedHash = UInt256.ParseHex("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b");
var tx = new Transaction
(
version: 1,
inputs: ImmutableArray.Create(
new TxInput
(
previousTxOutputKey: new TxOutputKey(txHash: UInt256.Zero, txOutputIndex: 4294967295),
scriptSignature: "04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73".HexToByteArray().ToImmutableArray(),
sequence: 4294967295
)),
outputs: ImmutableArray.Create(
new TxOutput
(
value: (UInt64)(50L * 100.MILLION()),
scriptPublicKey: "4104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac".HexToByteArray().ToImmutableArray()
)),
lockTime: 0
);
Assert.AreEqual(expectedHash, DataCalculator.CalculateTransactionHash(tx));
Assert.AreEqual(expectedHash, DataCalculator.CalculateTransactionHash(tx.Version, tx.Inputs, tx.Outputs, tx.LockTime));
}
public Transaction CreateCoinbaseTransaction(ECPublicKeyParameters publicKey, byte[] coinbase)
{
var tx = new Transaction
(
version: 1,
inputs: ImmutableArray.Create
(
new TxInput
(
previousTxOutputKey: new TxOutputKey
(
txHash: UInt256.Zero,
txOutputIndex: 0
),
scriptSignature: coinbase.ToImmutableArray(),
sequence: 0
)
),
outputs: ImmutableArray.Create
(
new TxOutput
(
value: 50L * (100 * 1000 * 1000),
scriptPublicKey: CreatePublicKeyScript(publicKey).ToImmutableArray()
)
),
lockTime: 0
);
return tx;
}
public override void ValidationTransactionScript(ChainedHeader chainedHeader, Transaction tx, int txIndex, TxInput txInput, int txInputIndex, TxOutput prevTxOutput)
{
if (ValidationTransactionScriptAction == null)
base.ValidationTransactionScript(chainedHeader, tx, txIndex, txInput, txInputIndex, prevTxOutput);
else
ValidationTransactionScriptAction(chainedHeader, tx, txIndex, txInput, txInputIndex, prevTxOutput);
}
public LoadingTx(int txIndex, Transaction transaction, ChainedHeader chainedHeader, ImmutableArray<TxLookupKey> prevOutputTxKeys)
{
Transaction = transaction;
TxIndex = txIndex;
ChainedHeader = chainedHeader;
PrevOutputTxKeys = prevOutputTxKeys;
InputTxes = new CompletionArray<DecodedTx>(txIndex != 0 ? transaction.Inputs.Length : 0);
}
public static DecodedBlockTx Create(int txIndex, Transaction tx)
{
if (tx == null)
throw new ArgumentNullException(nameof(tx));
var decodedTx = DataEncoder.EncodeTransaction(tx);
return new DecodedBlockTx(txIndex, decodedTx);
}
public byte[] TxSignature(byte[] scriptPubKey, Transaction tx, int inputIndex, byte hashType)
{
///TODO
Debug.Assert(inputIndex < tx.Inputs.Length);
// Blank out other inputs' signatures
var empty = ImmutableArray.Create<byte>();
var newInputs = ImmutableArray.CreateBuilder<TxInput>(tx.Inputs.Length);
for (var i = 0; i < tx.Inputs.Length; i++)
{
var oldInput = tx.Inputs[i];
var newInput = oldInput.With(scriptSignature: i == inputIndex ? scriptPubKey.ToImmutableArray() : empty);
newInputs.Add(newInput);
}
//// Blank out some of the outputs
//if ((hashType & 0x1F) == (int)ScriptHashType.SIGHASH_NONE)
//{
// //TODO
// Debug.Assert(false);
// // Wildcard payee
// // Let the others update at will
//}
//else if ((hashType & 0x1F) == (int)ScriptHashType.SIGHASH_SINGLE)
//{
// //TODO
// Debug.Assert(false);
// // Only lock-in the txout payee at same index as txin
// // Let the others update at will
//}
//// Blank out other inputs completely, not recommended for open transactions
//if ((hashType & 0x80) == (int)ScriptHashType.SIGHASH_ANYONECANPAY)
//{
// //TODO
// Debug.Assert(false);
//}
// create simplified transaction
var newTx = tx.With(Inputs: newInputs.ToImmutable());
// return wire-encoded simplified transaction with the 4-byte hashType tacked onto the end
using (var stream = new MemoryStream())
using (var writer = new BinaryWriter(stream))
{
writer.WriteBytes(DataEncoder.EncodeTransaction(newTx));
writer.WriteUInt32(hashType);
return stream.ToArray();
}
}
public void TestReadOneLoadingTx()
{
var coreStorageMock = new Mock<ICoreStorage>();
// create a fake transaction with 4 inputs
var prevTxCount = 4;
var txIndex = 1;
var chainedHeader = RandomData.RandomChainedHeader();
// create previous transactions for 4 inputs
var prevTxes = new Transaction[prevTxCount];
var inputs = new TxInput[prevTxCount];
for (var i = 0; i < prevTxCount; i++)
{
var prevTx = RandomData.RandomTransaction();
var prevBlockTx = (BlockTx)BlockTx.Create(i, prevTx);
prevTxes[i] = prevTx;
inputs[i] = new TxInput(prevTx.Hash, 0, ImmutableArray.Create<byte>(), 0);
// mock retrieval of the previous transaction
coreStorageMock.Setup(coreStorage => coreStorage.TryGetTransaction(UInt256.Zero, i, out prevBlockTx)).Returns(true);
}
// create a loading tx with the 4 inputs referencing block hash 0
var tx = RandomData.RandomTransaction(new RandomDataOptions { TxOutputCount = 1 })
.CreateWith(Inputs: inputs.ToImmutableArray()).Transaction;
var prevOutputTxKeys = ImmutableArray.CreateRange(
Enumerable.Range(0, prevTxCount).Select(x => new TxLookupKey(UInt256.Zero, x)));
var loadingTx = new LoadingTx(txIndex, tx, chainedHeader, prevOutputTxKeys);
// begin queuing transactions to load
var loadingTxes = new BufferBlock<LoadingTx>();
loadingTxes.Post(loadingTx);
loadingTxes.Complete();
// begin transaction loading
var txLoader = TxLoader.LoadTxes(coreStorageMock.Object, loadingTxes);
// verify the loaded transaction
var loadedTxesBuffer = new BufferBlock<LoadedTx>();
txLoader.LinkTo(loadedTxesBuffer, new DataflowLinkOptions { PropagateCompletion = true });
txLoader.Completion.Wait();
IList<LoadedTx> actualLoadedTxes;
Assert.IsTrue(loadedTxesBuffer.TryReceiveAll(out actualLoadedTxes));
var actualLoadedTx = actualLoadedTxes.Single();
Assert.AreEqual(loadingTx.TxIndex, actualLoadedTx.TxIndex);
Assert.AreEqual(loadingTx.Transaction, actualLoadedTx.Transaction);
CollectionAssert.AreEqual(prevTxes.Select(x => x.Hash).ToArray(), actualLoadedTx.InputTxes.Select(x => x.Hash).ToArray());
}
/// <summary>
/// Initializes a new instance of <see cref="LoadedTx"/> with the specified transaction and each input's previous transaction.
/// </summary>
/// <param name="transaction">The transaction.</param>
/// <param name="txIndex">The index of the transaction.</param>
/// <param name="inputTxes">The array of transactions corresponding to each input's previous transaction.</param>
public LoadedTx(Transaction transaction, int txIndex, ImmutableArray<DecodedTx> inputTxes)
{
Transaction = transaction;
TxIndex = txIndex;
InputTxes = inputTxes;
if (TxIndex == 0)
{
if (inputTxes.Length != 0)
throw new InvalidOperationException($"Coinbase InputTxes.Length: {inputTxes.Length}");
}
else
{
if (inputTxes.Length != transaction.Inputs.Length)
throw new InvalidOperationException($"Transaction.Inputs.Length: {transaction.Inputs.Length}, InputTxes.Length: {inputTxes.Length}");
}
}
private void Mint(IChainStateCursor chainStateCursor, Transaction tx, int txIndex, ChainedHeader chainedHeader)
{
// add transaction to the utxo
var unspentTx = new UnspentTx(tx.Hash, chainedHeader.Height, txIndex, tx.Version, tx.IsCoinbase, tx.Outputs.Length, OutputState.Unspent);
if (!chainStateCursor.TryAddUnspentTx(unspentTx))
{
// duplicate transaction
logger.Warn($"Duplicate transaction at block {chainedHeader.Height:N0}, {chainedHeader.Hash}, coinbase");
throw new ValidationException(chainedHeader.Hash);
}
// add transaction outputs to the utxo
for (var outputIndex = 0; outputIndex < tx.Outputs.Length; outputIndex++)
{
var output = tx.Outputs[outputIndex];
if (!chainStateCursor.TryAddUnspentTxOutput(new TxOutputKey(tx.Hash, (uint)outputIndex), output))
throw new ValidationException(chainedHeader.Hash);
}
}
public byte[] CreatePrivateKeyScript(Transaction tx, int inputIndex, byte hashType, ECPrivateKeyParameters privateKey, ECPublicKeyParameters publicKey)
{
//TODO
var scriptEngine = new ScriptEngine();
var publicAddress = CreatePublicAddress(publicKey);
var publicKeyScript = CreatePublicKeyScript(publicAddress);
var txSignature = scriptEngine.TxSignature(publicKeyScript, tx, inputIndex, hashType);
var txSignatureHash = SHA256Static.ComputeDoubleHash(txSignature);
//Debug.WriteLine("Signing Tx: {0}".Format2(txSignature.ToHexDataString()));
//Debug.WriteLine("Signing Tx Hash: {0}".Format2(txSignatureHash.ToHexDataString()));
var signer = new ECDsaSigner();
signer.Init(forSigning: true, parameters: privateKey);
var signature = signer.GenerateSignature(txSignatureHash);
var r = signature[0];
var s = signature[1];
byte[] sigEncoded;
using (var stream = new MemoryStream())
{
using (var asn1Stream = new Asn1OutputStream(stream))
{
asn1Stream.WriteObject(new DerSequence(new DerInteger(r), new DerInteger(s)));
}
sigEncoded = stream.ToArray().Concat(hashType);
}
//Debug.WriteLine("Sig R: {0}".Format2(r.ToHexNumberStringUnsigned()));
//Debug.WriteLine("Sig S: {0}".Format2(s.ToHexNumberStringUnsigned()));
//Debug.WriteLine("Sig Encoded: {0}".Format2(sigEncoded.ToHexDataString()));
using (var privateKeyScript = new ScriptBuilder())
{
privateKeyScript.WritePushData(sigEncoded);
privateKeyScript.WritePushData(publicAddress);
//Debug.WriteLine("Private Script: {0}".Format2(privateKeyScript.GetScript().ToHexDataString()));
return privateKeyScript.GetScript();
}
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out Transaction transaction)
{
int blockId;
if (!this.TryGetBlockId(blockHash, out blockId))
{
transaction = default(Transaction);
return(false);
}
using (var handle = this.cursorCache.TakeItem())
{
var cursor = handle.Item;
using (var jetTx = cursor.jetSession.BeginTransaction())
{
Api.JetSetCurrentIndex(cursor.jetSession, cursor.blocksTableId, "IX_BlockIdTxIndex");
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, blockId, MakeKeyGrbit.NewKey);
Api.MakeKey(cursor.jetSession, cursor.blocksTableId, txIndex, MakeKeyGrbit.None);
if (Api.TrySeek(cursor.jetSession, cursor.blocksTableId, SeekGrbit.SeekEQ))
{
var txBytes = Api.RetrieveColumn(cursor.jetSession, cursor.blocksTableId, cursor.blockTxBytesColumnId);
if (txBytes != null)
{
transaction = DataEncoder.DecodeTransaction(txBytes);
return(true);
}
else
{
transaction = default(Transaction);
return(false);
}
}
else
{
transaction = default(Transaction);
return(false);
}
}
}
}
private void TestTransactionSignature(byte[][] expectedSignatures, Transaction tx, IDictionary<UInt256, Transaction> txLookup)
{
var scriptEngine = new ScriptEngine();
for (var inputIndex = 0; inputIndex < tx.Inputs.Length; inputIndex++)
{
var input = tx.Inputs[inputIndex];
var prevOutput = txLookup[input.PreviousTxOutputKey.TxHash].Outputs[input.PreviousTxOutputKey.TxOutputIndex.ToIntChecked()];
var hashType = GetHashTypeFromScriptSig(input.ScriptSignature.ToArray());
var actual = scriptEngine.TxSignature(prevOutput.ScriptPublicKey.ToArray(), tx, inputIndex, hashType);
CollectionAssert.AreEqual(expectedSignatures[inputIndex].ToList(), actual.ToList());
}
}
public static DecodedTx EncodeTransaction(Transaction tx)
{
using (var stream = new MemoryStream())
using (var writer = new BinaryWriter(stream))
{
EncodeTransaction(writer, tx);
var txBytes = stream.ToArray();
return new DecodedTx(txBytes.ToImmutableArray(), tx);
}
}
public static DecodedTx EncodeTransaction(UInt32 Version, ImmutableArray<TxInput> Inputs, ImmutableArray<TxOutput> Outputs, UInt32 LockTime)
{
using (var stream = new MemoryStream())
using (var writer = new BinaryWriter(stream))
{
writer.WriteUInt32(Version);
writer.WriteList(Inputs, input => EncodeTxInput(writer, input));
writer.WriteList(Outputs, output => EncodeTxOutput(writer, output));
writer.WriteUInt32(LockTime);
var txBytes = stream.ToArray();
var txHash = new UInt256(SHA256Static.ComputeDoubleHash(txBytes));
var tx = new Transaction(Version, Inputs, Outputs, LockTime, txHash);
return new DecodedTx(txBytes.ToImmutableArray(), tx);
}
}
public static void EncodeTransaction(BinaryWriter writer, Transaction tx)
{
writer.WriteUInt32(tx.Version);
writer.WriteList(tx.Inputs, input => EncodeTxInput(writer, input));
writer.WriteList(tx.Outputs, output => EncodeTxOutput(writer, output));
writer.WriteUInt32(tx.LockTime);
}
//TODO only used by tests
public BlockTx(int txIndex, Transaction tx)
: this(txIndex, 0, tx.Hash, false, tx)
{ }
public static void GetTransaction(MainnetBlockProvider blockProvider, int blockIndex, int txIndex, out Block block, out Transaction tx)
{
block = blockProvider.GetBlock(blockIndex);
tx = block.Transactions[txIndex];
}
public bool VerifySignature(byte[] scriptPubKey, Transaction tx, byte[] sig, byte[] pubKey, int inputIndex, out byte hashType, out byte[] txSignature, out byte[] txSignatureHash)
{
// get the 1-byte hashType off the end of sig
hashType = sig[sig.Length - 1];
// get the DER encoded portion of sig, which is everything except the last byte (the last byte being hashType)
var sigDER = sig.Take(sig.Length - 1).ToArray();
// get the simplified/signing version of the transaction
txSignature = TxSignature(scriptPubKey, tx, inputIndex, hashType);
// get the hash of the simplified/signing version of the transaction
txSignatureHash = SHA256Static.ComputeDoubleHash(txSignature);
if (this.ignoreSignatures)
{
return true;
}
else
{
#if SECP256K1_DLL
// verify that signature is valid for pubKey and the simplified/signing transaction's hash
return Signatures.Verify(txSignatureHash, sigDER, pubKey) == Signatures.VerifyResult.Verified;
#else
return true;
#endif
}
}
public BlockTx(int index, int depth, UInt256 hash, bool pruned, Transaction transaction)
: base(index, depth, hash, pruned)
{
Transaction = transaction;
}
public static void GetFirstMultiInputTransaction(MainnetBlockProvider blockProvider, out Block block, out Transaction tx, out IDictionary<UInt256, Transaction> txLookup)
{
txLookup = new Dictionary<UInt256, Transaction>();
// prior outputs for first transaction
GetTransaction(blockProvider, 360, 0, out block, out tx);
txLookup.Add(tx.Hash, tx);
GetTransaction(blockProvider, 187, 1, out block, out tx);
txLookup.Add(tx.Hash, tx);
GetTransaction(blockProvider, 248, 1, out block, out tx);
txLookup.Add(tx.Hash, tx);
// first transaction
// do this last so its output is what is returned
GetTransaction(blockProvider, 496, 1, out block, out tx);
txLookup.Add(tx.Hash, tx);
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out Transaction transaction)
{
ImmutableSortedDictionary<int, BlockTx> blockTxes;
BlockTx blockTx;
if (this.allBlockTxes.TryGetValue(blockHash, out blockTxes)
&& blockTxes.TryGetValue(txIndex, out blockTx))
{
transaction = blockTx.Transaction;
return true;
}
else
{
transaction = default(Transaction);
return false;
}
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out Transaction transaction)
{
return GetStorage(blockHash).TryGetTransaction(blockHash, txIndex, out transaction);
}
private void TestTransactionVerifyScript(Transaction tx, IDictionary<UInt256, Transaction> txLookup)
{
var scriptEngine = new ScriptEngine();
for (var inputIndex = 0; inputIndex < tx.Inputs.Length; inputIndex++)
{
var input = tx.Inputs[inputIndex];
var prevOutput = txLookup[input.PreviousTxOutputKey.TxHash].Outputs[input.PreviousTxOutputKey.TxOutputIndex.ToIntChecked()];
var script = GetScriptFromInputPrevOutput(input, prevOutput);
var result = scriptEngine.VerifyScript(UInt256.Zero /*blockHash*/, -1 /*txIndex*/, prevOutput.ScriptPublicKey.ToArray(), tx, inputIndex, script);
Assert.IsTrue(result);
}
}
private bool ExecuteOps(byte[] scriptPubKey, Transaction tx, int inputIndex, byte[] script, out Stack stack, out Stack altStack)
{
stack = new Stack();
altStack = new Stack();
using (var scriptStream = new MemoryStream(script))
using (var opReader = new BinaryReader(scriptStream))
{
while (opReader.BaseStream.Position < script.Length)
{
var opByte = opReader.ReadByte();
var op = (ScriptOp)Enum.ToObject(typeof(ScriptOp), opByte);
if (logger.IsTraceEnabled)
logger.Trace("Executing {0} with stack count: {1}", OpName(opByte), stack.Count);
switch (op)
{
// Constants
case ScriptOp.OP_PUSHDATA1:
{
if (opReader.BaseStream.Position + 1 >= script.Length)
return false;
var length = opReader.ReadByte();
stack.PushBytes(opReader.ReadBytes(length));
}
break;
case ScriptOp.OP_PUSHDATA2:
{
if (opReader.BaseStream.Position + 2 >= script.Length)
return false;
var length = opReader.ReadUInt16();
stack.PushBytes(opReader.ReadBytes(length));
}
break;
case ScriptOp.OP_PUSHDATA4:
{
if (opReader.BaseStream.Position + 4 >= script.Length)
return false;
var length = opReader.ReadUInt32();
stack.PushBytes(opReader.ReadBytes(length.ToIntChecked()));
}
break;
// Flow control
case ScriptOp.OP_NOP:
{
}
break;
// Stack
case ScriptOp.OP_DROP:
{
if (stack.Count < 1)
return false;
var value = stack.PopBytes();
if (logger.IsTraceEnabled)
logger.Trace("{0} dropped {1}", OpName(opByte), value);
}
break;
case ScriptOp.OP_DUP:
{
if (stack.Count < 1)
return false;
var value = stack.PeekBytes();
stack.PushBytes(value);
if (logger.IsTraceEnabled)
logger.Trace("{0} duplicated {2}", OpName(opByte), value);
}
break;
// Splice
// Bitwise logic
case ScriptOp.OP_EQUAL:
case ScriptOp.OP_EQUALVERIFY:
{
if (stack.Count < 2)
return false;
var value1 = stack.PopBytes();
var value2 = stack.PopBytes();
var result = value1.SequenceEqual(value2);
stack.PushBool(result);
if (logger.IsTraceEnabled)
logger.Trace(
@"{0} compared values:
value1: {1}
value2: {2}
result: {3}", OpName(opByte), value1, value2, result);
if (op == ScriptOp.OP_EQUALVERIFY)
{
if (result)
stack.PopBool();
else
return false;
}
}
break;
// Arithmetic
// Note: Arithmetic inputs are limited to signed 32-bit integers, but may overflow their output.
// Crypto
case ScriptOp.OP_SHA256:
{
if (stack.Count < 1)
return false;
var value = stack.PopBytes().ToArray();
var hash = SHA256Static.ComputeHash(value);
stack.PushBytes(hash);
if (logger.IsTraceEnabled)
logger.Trace(
@"{0} hashed value:
value: {1}
hash: {2}", OpName(opByte), value, hash);
}
break;
case ScriptOp.OP_HASH160:
{
if (stack.Count < 1)
return false;
var value = stack.PopBytes().ToArray();
var hash = RIPEMD160Static.ComputeHash(SHA256Static.ComputeHash(value));
stack.PushBytes(hash);
if (logger.IsTraceEnabled)
logger.Trace(
@"{0} hashed value:
value: {1}
hash: {2}", OpName(opByte), value, hash);
}
break;
case ScriptOp.OP_CHECKSIG:
case ScriptOp.OP_CHECKSIGVERIFY:
{
if (stack.Count < 2)
return false;
var pubKey = stack.PopBytes().ToArray();
var sig = stack.PopBytes().ToArray();
var startTime = DateTime.UtcNow;
byte hashType; byte[] txSignature, txSignatureHash;
var result = VerifySignature(scriptPubKey, tx, sig, pubKey, inputIndex, out hashType, out txSignature, out txSignatureHash);
stack.PushBool(result);
var finishTime = DateTime.UtcNow;
if (logger.IsTraceEnabled)
logger.Trace(
@"{0} executed in {9} ms:
tx: {1}
inputIndex: {2}
pubKey: {3}
sig: {4}
hashType: {5}
txSignature: {6}
txSignatureHash: {7}
result: {8}", OpName(opByte), new byte[0] /*tx.ToRawBytes()*/, inputIndex, pubKey, sig, hashType, txSignature, txSignatureHash, result, (finishTime - startTime).TotalMilliseconds.ToString("0"));
if (op == ScriptOp.OP_CHECKSIGVERIFY)
{
if (result)
stack.PopBool();
else
return false;
}
}
break;
// Pseudo-words
// These words are used internally for assisting with transaction matching. They are invalid if used in actual scripts.
// Reserved words
// Any opcode not assigned is also reserved. Using an unassigned opcode makes the transaction invalid.
default:
//OP_PUSHBYTES1-75
if (opByte >= (int)ScriptOp.OP_PUSHBYTES1 && opByte <= (int)ScriptOp.OP_PUSHBYTES75)
{
stack.PushBytes(opReader.ReadBytes(opByte));
if (logger.IsTraceEnabled)
logger.Trace("{0} loaded {1} bytes onto the stack: {2}", OpName(opByte), opByte, stack.PeekBytes());
}
// Unknown op
else
{
var message = $"Invalid operation in tx {tx.Hash} input {inputIndex}: {new[] { opByte }.ToHexNumberString()} {OpName(opByte)}";
//logger.Warn(message);
throw new Exception(message);
}
break;
}
if (logger.IsTraceEnabled)
logger.Trace(new string('-', 80));
}
}
// TODO verify no if/else blocks left over
// TODO not entirely sure what default return should be
return true;
}
private void TestTransactionVerifySignature(byte[] expectedHashTypes, byte[][] expectedSignatures, byte[][] expectedSignatureHashes, Transaction tx, IDictionary<UInt256, Transaction> txLookup)
{
var scriptEngine = new ScriptEngine();
for (var inputIndex = 0; inputIndex < tx.Inputs.Length; inputIndex++)
{
var input = tx.Inputs[inputIndex];
var prevOutput = txLookup[input.PreviousTxOutputKey.TxHash].Outputs[input.PreviousTxOutputKey.TxOutputIndex.ToIntChecked()];
var scriptSigBytes = input.ScriptSignature.ToArray();
var hashType = GetHashTypeFromScriptSig(scriptSigBytes);
var sig = GetSigFromScriptSig(scriptSigBytes);
var pubKey = GetPubKeyFromScripts(scriptSigBytes, prevOutput.ScriptPublicKey.ToArray());
byte[] txSignature, txSignatureHash;
var result = scriptEngine.VerifySignature(prevOutput.ScriptPublicKey.ToArray(), tx, sig.ToArray(), pubKey.ToArray(), inputIndex, out hashType, out txSignature, out txSignatureHash);
Assert.AreEqual(expectedHashTypes[inputIndex], hashType);
CollectionAssert.AreEqual(expectedSignatures[inputIndex].ToList(), txSignature.ToList());
CollectionAssert.AreEqual(expectedSignatureHashes[inputIndex].ToList(), txSignatureHash.ToList());
Assert.IsTrue(result);
}
}
public static void GetFirstHash160Transaction(MainnetBlockProvider blockProvider, out Block block, out Transaction tx, out IDictionary<UInt256, Transaction> txLookup)
{
txLookup = new Dictionary<UInt256, Transaction>();
// prior outputs for first OP_HASH160 transaction
GetTransaction(blockProvider, 2676, 0, out block, out tx);
txLookup.Add(tx.Hash, tx);
GetTransaction(blockProvider, 2812, 1, out block, out tx);
txLookup.Add(tx.Hash, tx);
// first OP_HASH160 transaction
// do this last so its output is what is returned
GetTransaction(blockProvider, 2812, 2, out block, out tx);
txLookup.Add(tx.Hash, tx);
}
public bool TryGetTransaction(UInt256 blockHash, int txIndex, out Transaction transaction)
{
using (var txn = this.jetInstance.BeginTransaction(TransactionBeginFlags.ReadOnly))
{
byte[] blockTxBytes;
if (txn.TryGet(blocksTableId, DbEncoder.EncodeBlockHashTxIndex(blockHash, txIndex), out blockTxBytes))
{
var blockTx = DataEncoder.DecodeBlockTx(blockTxBytes);
transaction = blockTx.Transaction;
return transaction != null;
}
else
{
transaction = default(Transaction);
return false;
}
}
}
/// <summary>
/// Initializes a new instance of <see cref="LoadedTx"/> with the specified transaction and each input's previous transaction.
/// </summary>
/// <param name="transaction">The transaction.</param>
/// <param name="txIndex">The index of the transaction.</param>
/// <param name="inputTxes">The array of transactions corresponding to each input's previous transaction.</param>
public LoadedTx(Transaction transaction, int txIndex, ImmutableArray<Transaction> inputTxes)
{
Transaction = transaction;
TxIndex = txIndex;
InputTxes = inputTxes;
}
public EncodedTx(ImmutableArray<byte> txBytes, Transaction transaction)
{
Hash = transaction.Hash;
TxBytes = txBytes;
lazyTx = new Lazy<Transaction>(() => transaction).Force();
}
public DecodedTx CreateSpendTransaction(Transaction prevTx, int prevInputIndex, byte hashType, UInt64 value, ECPrivateKeyParameters fromPrivateKey, ECPublicKeyParameters fromPublicKey, ECPublicKeyParameters toPublicKey)
{
var tx = Transaction.Create
(
version: 1,
inputs: ImmutableArray.Create
(
new TxInput
(
prevTxHash: prevTx.Hash,
prevTxOutputIndex: (UInt32)prevInputIndex,
scriptSignature: ImmutableArray.Create<byte>(),
sequence: 0
)
),
outputs: ImmutableArray.Create
(
new TxOutput
(
value: value,
scriptPublicKey: CreatePublicKeyScript(toPublicKey).ToImmutableArray()
)
),
lockTime: 0
);
// sign the transaction
var scriptSignature = CreatePrivateKeyScript(tx.Transaction, 0, hashType, fromPrivateKey, fromPublicKey).ToImmutableArray();
// add the signature script to the transaction
tx = tx.Transaction.CreateWith(Inputs: ImmutableArray.Create(tx.Transaction.Inputs[0].With(scriptSignature: scriptSignature)));
return tx;
}
