public static byte[] EncodeTxInput(TxInput txInput)
{
var stream = new MemoryStream();
EncodeTxInput(stream, txInput);
return(stream.ToArray());
}
protected override void ExecuteCommand(string[] args)
{
var sender = WalletService.GetActiveKey().Data.Address;
var receiver = WalletService.GetAddress(receiverArgument.Value);
var currency = Currency.FromSymbol(currencyArgument.Value);
var amount = Amount.FromWholeDecimal(Convert.ToDecimal(amountArgument.Value));
var input = new TxInput(sender, currency, amount);
var output = new TxOutput(receiver, currency, amount);
var declarations = new List <TxDeclaration> {
};
var inputs = new List <TxInput> {
input
};
var outputs = new List <TxOutput> {
output
};
var fees = WalletService.CreateFeesInput(sender);
var transaction = new Transaction(declarations, inputs, outputs, TransactionMessage.Empty, DateTime.UtcNow.AddMinutes(1).ToUnixTimestamp(), fees);
if (WalletService.SignAndSubmit(transaction))
{
Console.WriteLine($"Successfully sent transaction");
}
}
public static void EncodeTxInput(BinaryWriter writer, TxInput txInput)
{
writer.WriteUInt256(txInput.PrevTxOutputKey.TxHash);
writer.WriteUInt32(txInput.PrevTxOutputKey.TxOutputIndex);
writer.WriteVarBytes(txInput.ScriptSignature.ToArray());
writer.WriteUInt32(txInput.Sequence);
}
public static byte[] EncodeTxInput(TxInput txInput)
{
using (var stream = new MemoryStream())
using (var writer = new BinaryWriter(stream))
{
EncodeTxInput(writer, txInput);
return(stream.ToArray());
}
}
public TxInputWithPrevOutput(ChainedHeader chainedHeader, Transaction transaction, int txIndex, TxInput txInput, int inputIndex, TxOutput prevTxOutput)
{
this.chainedHeader = chainedHeader;
this.transaction = transaction;
this.txIndex = txIndex;
this.txInput = txInput;
this.inputIndex = inputIndex;
this.prevTxOutput = prevTxOutput;
}
public byte[] TxSignature(ImmutableArray <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 = new 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 : empty);
newInputs[i] = 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.ToImmutableArray());
// return wire-encoded simplified transaction with the 4-byte hashType tacked onto the end
var stream = new MemoryStream();
using (var writer = new BinaryWriter(stream))
{
writer.WriteBytes(DataCalculator.EncodeTransaction(newTx));
writer.Write4Bytes(hashType);
return(stream.ToArray());
}
}
public void TestTxInputEquality()
{
var randomTxInput = RandomData.RandomTxInput();
var sameTxInput = new TxInput
(
previousTxOutputKey: new TxOutputKey
(
txHash: randomTxInput.PreviousTxOutputKey.TxHash,
txOutputIndex: randomTxInput.PreviousTxOutputKey.TxOutputIndex
),
scriptSignature: ImmutableArray.Create(randomTxInput.ScriptSignature.ToArray()),
sequence: randomTxInput.Sequence
);
var differentTxInputPreviousTxOutputKey = new TxInput
(
previousTxOutputKey: new TxOutputKey
(
txHash: ~randomTxInput.PreviousTxOutputKey.TxHash,
txOutputIndex: randomTxInput.PreviousTxOutputKey.TxOutputIndex
),
scriptSignature: randomTxInput.ScriptSignature,
sequence: randomTxInput.Sequence
);
var differentTxInputScriptSignature = new TxInput
(
previousTxOutputKey: randomTxInput.PreviousTxOutputKey,
scriptSignature: randomTxInput.ScriptSignature.Add(0),
sequence: randomTxInput.Sequence
);
var differentTxInputSequence = new TxInput
(
previousTxOutputKey: randomTxInput.PreviousTxOutputKey,
scriptSignature: randomTxInput.ScriptSignature,
sequence: ~randomTxInput.Sequence
);
Assert.IsTrue(randomTxInput.Equals(sameTxInput));
Assert.IsTrue(randomTxInput == sameTxInput);
Assert.IsFalse(randomTxInput != sameTxInput);
Assert.IsFalse(randomTxInput.Equals(differentTxInputPreviousTxOutputKey));
Assert.IsFalse(randomTxInput == differentTxInputPreviousTxOutputKey);
Assert.IsTrue(randomTxInput != differentTxInputPreviousTxOutputKey);
Assert.IsFalse(randomTxInput.Equals(differentTxInputScriptSignature));
Assert.IsFalse(randomTxInput == differentTxInputScriptSignature);
Assert.IsTrue(randomTxInput != differentTxInputScriptSignature);
Assert.IsFalse(randomTxInput.Equals(differentTxInputSequence));
Assert.IsFalse(randomTxInput == differentTxInputSequence);
Assert.IsTrue(randomTxInput != differentTxInputSequence);
}
public void TestTxInputEquality()
{
var randomTxInput = RandomData.RandomTxInput();
var sameTxInput = new TxInput
(
previousTxOutputKey: new TxOutputKey
(
txHash: randomTxInput.PreviousTxOutputKey.TxHash,
txOutputIndex: randomTxInput.PreviousTxOutputKey.TxOutputIndex
),
scriptSignature: ImmutableArray.Create(randomTxInput.ScriptSignature.ToArray()),
sequence: randomTxInput.Sequence
);
var differentTxInputPreviousTxOutputKey = new TxInput
(
previousTxOutputKey: new TxOutputKey
(
txHash: ~randomTxInput.PreviousTxOutputKey.TxHash,
txOutputIndex: randomTxInput.PreviousTxOutputKey.TxOutputIndex
),
scriptSignature: randomTxInput.ScriptSignature,
sequence: randomTxInput.Sequence
);
var differentTxInputScriptSignature = new TxInput
(
previousTxOutputKey: randomTxInput.PreviousTxOutputKey,
scriptSignature: randomTxInput.ScriptSignature.Add(0),
sequence: randomTxInput.Sequence
);
var differentTxInputSequence = new TxInput
(
previousTxOutputKey: randomTxInput.PreviousTxOutputKey,
scriptSignature: randomTxInput.ScriptSignature,
sequence: ~randomTxInput.Sequence
);
Assert.IsTrue(randomTxInput.Equals(sameTxInput));
Assert.IsTrue(randomTxInput == sameTxInput);
Assert.IsFalse(randomTxInput != sameTxInput);
Assert.IsFalse(randomTxInput.Equals(differentTxInputPreviousTxOutputKey));
Assert.IsFalse(randomTxInput == differentTxInputPreviousTxOutputKey);
Assert.IsTrue(randomTxInput != differentTxInputPreviousTxOutputKey);
Assert.IsFalse(randomTxInput.Equals(differentTxInputScriptSignature));
Assert.IsFalse(randomTxInput == differentTxInputScriptSignature);
Assert.IsTrue(randomTxInput != differentTxInputScriptSignature);
Assert.IsFalse(randomTxInput.Equals(differentTxInputSequence));
Assert.IsFalse(randomTxInput == differentTxInputSequence);
Assert.IsTrue(randomTxInput != differentTxInputSequence);
}
public void UnCoinbaseInput(ChainPosition chainPosition, TxInput txInput)
{
this.Add(() =>
{
foreach (var visitor in this.visitors)
{
visitor.UnCoinbaseInput(chainPosition, txInput);
}
});
}
public void UnspendTxOutput(ChainPosition chainPosition, TxInput txInput, TxOutputKey txOutputKey, TxOutput txOutput, UInt256 outputScriptHash)
{
//this.Add(() =>
//{
foreach (var visitor in this.visitors)
{
visitor.UnspendTxOutput(chainPosition, txInput, txOutputKey, txOutput, outputScriptHash);
}
//});
}
public void CoinbaseInput(ChainPosition chainPosition, TxInput txInput)
{
//this.Add(() =>
//{
foreach (var visitor in this.visitors)
{
visitor.CoinbaseInput(chainPosition, txInput);
}
//});
}
public static void EncodeTxInput(Stream stream, TxInput txInput)
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, leaveOpen: true))
{
writer.Write32Bytes(txInput.PreviousTxOutputKey.TxHash);
writer.Write4Bytes(txInput.PreviousTxOutputKey.TxOutputIndex);
EncodeVarBytes(writer, txInput.ScriptSignature.ToArray());
writer.Write4Bytes(txInput.Sequence);
}
}
private bool IsExchange(Transaction transaction)
{
TxInput send = null;
// what the machine sends
foreach (var input in transaction.Inputs)
{
if (input.Address.Encoded == Machine.Address.Encoded)
{
if (input.Currency == Machine.CurrencyOut)
{
send = input;
}
else
{
return(false); // the machine only outputs the specified currency
}
}
}
if (send == null)
{
return(false);
}
TxOutput receive = null;
// what the machine receives
foreach (var output in transaction.Outputs)
{
if (output.Address.Encoded == Machine.Address.Encoded)
{
if (output.Currency == Machine.CurrencyIn)
{
receive = output;
}
}
}
if (receive == null)
{
return(false);
}
// verify it matches
try
{
var maximum = Amount.Multiply(send.Amount, Machine.Rate);
return(receive.Amount >= maximum);
}
catch (OverflowException)
{
return(false);
}
}
public void ValidationTransactionScript(Chain newChain, BlockTx tx, TxInput txInput, int txInputIndex, PrevTxOutput prevTxOutput)
{
if (ValidationTransactionScriptAction == null)
{
coreRules.ValidationTransactionScript(newChain, tx, txInput, txInputIndex, prevTxOutput);
}
else
{
ValidationTransactionScriptAction(newChain, tx, txInput, txInputIndex, prevTxOutput);
}
}
public void TestDoubleSpend()
{
// prepare block
var fakeHeaders = new FakeHeaders();
var chainedHeader0 = fakeHeaders.GenesisChained();
var chainedHeader1 = fakeHeaders.NextChained();
var chainedHeader2 = fakeHeaders.NextChained();
var chain = Chain.CreateForGenesisBlock(chainedHeader0).ToBuilder();
var emptyCoinbaseTx0 = BlockTx.Create(0, Transaction.Create(0, ImmutableArray.Create <TxInput>(), ImmutableArray.Create <TxOutput>(), 0));
var emptyCoinbaseTx1 = BlockTx.Create(0, Transaction.Create(1, ImmutableArray.Create <TxInput>(), ImmutableArray.Create <TxOutput>(), 0));
// initialize memory utxo builder storage
var memoryStorage = new MemoryStorageManager();
var memoryChainStateCursor = memoryStorage.OpenChainStateCursor().Item;
memoryChainStateCursor.BeginTransaction();
// initialize utxo builder
var utxoBuilder = new UtxoBuilder();
// prepare an unspent transaction
var txHash = new UInt256(100);
var unspentTx = new UnspentTx(txHash, chainedHeader1.Height, 0, 0, false, 1, OutputState.Unspent);
var txOutputKey = new TxOutputKey(txHash, 0);
var txOutput = new TxOutput(0, ImmutableArray <byte> .Empty);
// add the unspent transaction
memoryChainStateCursor.TryAddUnspentTx(unspentTx);
memoryChainStateCursor.TryAddUnspentTxOutput(txOutputKey, txOutput);
// create an input to spend the unspent transaction
var input = new TxInput(txHash, 0, ImmutableArray.Create <byte>(), 0);
var tx = BlockTx.Create(1, Transaction.Create(0, ImmutableArray.Create(input), ImmutableArray.Create <TxOutput>(), 0));
// spend the input
chain.AddBlock(chainedHeader1);
utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx0, tx }.ToBufferBlock()).ToEnumerable().ToList();
// verify utxo storage
UnspentTx actualUnspentTx; TxOutput actualTxOutput;
Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx));
Assert.IsTrue(actualUnspentTx.IsFullySpent);
Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTxOutput(txOutputKey, out actualTxOutput));
Assert.AreEqual(txOutput, actualTxOutput);
// attempt to spend the input again, validation exception should be thrown
chain.AddBlock(chainedHeader2);
AssertMethods.AssertAggregateThrows <ValidationException>(() =>
utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx1, tx }.ToBufferBlock()).ToEnumerable().ToList());
}
protected override void ExecuteCommand(string[] args)
{
var owner = WalletService.GetActiveKey().Data.Address;
var @in = Currency.FromSymbol(currencyInArgument.Value);
var @out = Currency.FromSymbol(currencyOutArgument.Value);
var rate = Amount.FromWholeDecimal(Decimal.Parse(rateArgument.Value));
var machine = new VendingMachine(owner, @in, @out, rate);
// TODO put this in a gobal function
var alias = aliasArgument.Value;
WalletService.ImportDeclaration(alias, machine);
var amount = Amount.FromWholeDecimal(Convert.ToDecimal(amountArgument.Value));
var sender = owner;
var receiver = machine.Address;
var currency = @out;
// TODO put this in a gobal function
var input = new TxInput(sender, currency, amount);
var output = new TxOutput(receiver, currency, amount);
var declarations = new List <TxDeclaration> {
machine
};
var inputs = new List <TxInput> {
input
};
var outputs = new List <TxOutput> {
output
};
var fees = WalletService.CreateFeesInput(sender);
var transaction = new Transaction(declarations, inputs, outputs, TransactionMessage.Empty, DateTime.UtcNow.AddMinutes(1).ToUnixTimestamp(), fees);
if (WalletService.SignAndSubmit(transaction))
{
Console.WriteLine($"Successfully sent transaction");
}
// --
}
public void TestDoubleSpend()
{
// prepare test kernel
var kernel = new StandardKernel(new MemoryStorageModule());
// prepare block
var fakeHeaders = new FakeHeaders();
var chainedHeader = new ChainedHeader(fakeHeaders.Genesis(), height: 0, totalWork: 0);
// prepare an unspent transaction
var txHash = new UInt256(100);
var unspentTx = new UnspentTx(chainedHeader.Hash, 1, OutputState.Unspent);
// mock a parent utxo containing the unspent transaction
var unspentTransactions = ImmutableDictionary.Create <UInt256, UnspentTx>().Add(txHash, unspentTx);
var mockParentChainStateStorage = new Mock <IChainStateStorage>();
mockParentChainStateStorage.Setup(utxo => utxo.UnspentTransactions()).Returns(unspentTransactions);
var parentUtxo = new Utxo(mockParentChainStateStorage.Object);
// initialize memory utxo builder storage
var memoryChainStateBuilderStorage = new MemoryChainStateBuilderStorage(mockParentChainStateStorage.Object);
kernel.Rebind <IChainStateBuilderStorage>().ToConstant(memoryChainStateBuilderStorage);
// initialize utxo builder
var chainStateBuilder = new ChainStateBuilder(null, parentUtxo, LogManager.CreateNullLogger(), kernel, null, null, null, null, null);
// create an input to spend the unspent transaction
var input = new TxInput(new TxOutputKey(txHash, txOutputIndex: 0), ImmutableArray.Create <byte>(), 0);
var tx = new Transaction(0, ImmutableArray.Create(input), ImmutableArray.Create <TxOutput>(), 0);
// spend the input
chainStateBuilder.Spend(0, tx, 0, input, chainedHeader);
// verify utxo storage
Assert.IsFalse(memoryChainStateBuilderStorage.UnspentTransactionsDictionary.ContainsKey(txHash));
// attempt to spend the input again
chainStateBuilder.Spend(0, tx, 0, input, chainedHeader);
// validation exception should be thrown
}
public void TestDoubleSpend()
{
// prepare block
var fakeHeaders = new FakeHeaders();
var chainedHeader0 = fakeHeaders.GenesisChained();
var chainedHeader1 = fakeHeaders.NextChained();
var chain = new ChainBuilder();
var emptyCoinbaseTx0 = new Transaction(0, ImmutableArray.Create <TxInput>(), ImmutableArray.Create <TxOutput>(), 0);
var emptyCoinbaseTx1 = new Transaction(1, ImmutableArray.Create <TxInput>(), ImmutableArray.Create <TxOutput>(), 0);
// initialize memory utxo builder storage
var memoryStorage = new MemoryStorageManager();
var memoryChainStateCursor = memoryStorage.OpenChainStateCursor().Item;
// initialize utxo builder
var utxoBuilder = new UtxoBuilder(memoryChainStateCursor, LogManager.CreateNullLogger());
// prepare an unspent transaction
var txHash = new UInt256(100);
var unspentTx = new UnspentTx(txHash, chainedHeader0.Height, 0, 1, OutputState.Unspent);
// add the unspent transaction
memoryChainStateCursor.TryAddUnspentTx(unspentTx);
// create an input to spend the unspent transaction
var input = new TxInput(new TxOutputKey(txHash, txOutputIndex: 0), ImmutableArray.Create <byte>(), 0);
var tx = new Transaction(0, ImmutableArray.Create(input), ImmutableArray.Create <TxOutput>(), 0);
// spend the input
chain.AddBlock(chainedHeader0);
utxoBuilder.CalculateUtxo(chain.ToImmutable(), new[] { emptyCoinbaseTx0, tx }).ToList();
// verify utxo storage
Assert.IsFalse(memoryChainStateCursor.ContainsUnspentTx(txHash));
// attempt to spend the input again
chain.AddBlock(chainedHeader1);
utxoBuilder.CalculateUtxo(chain.ToImmutable(), new[] { emptyCoinbaseTx1, tx }).ToList();
// validation exception should be thrown
}
public void ValidationTransactionScript(Chain newChain, BlockTx tx, TxInput txInput, int txInputIndex, PrevTxOutput prevTxOutput)
{
var chainedHeader = newChain.LastBlock;
// BIP16 didn't become active until Apr 1 2012
var nBIP16SwitchTime = DateTimeOffset.FromUnixTimeSeconds(1333238400U);
var strictPayToScriptHash = chainedHeader.Time >= nBIP16SwitchTime;
var flags = strictPayToScriptHash ? verify_flags_type.verify_flags_p2sh : verify_flags_type.verify_flags_none;
// Start enforcing the DERSIG (BIP66) rules, for block.nVersion=3 blocks,
// when 75% of the network has upgraded:
if (chainedHeader.Version >= 3 &&
IsSuperMajority(3, newChain, ChainParams.MajorityEnforceBlockUpgrade))
{
flags |= verify_flags_type.verify_flags_dersig;
}
// Start enforcing CHECKLOCKTIMEVERIFY, (BIP65) for block.nVersion=4
// blocks, when 75% of the network has upgraded:
if (chainedHeader.Version >= 4 &&
IsSuperMajority(4, newChain, ChainParams.MajorityEnforceBlockUpgrade))
{
flags |= verify_flags_type.verify_flags_checklocktimeverify;
}
var result = LibbitcoinConsensus.VerifyScript(
tx.TxBytes,
prevTxOutput.ScriptPublicKey,
txInputIndex,
flags);
if (!result)
{
logger.Debug($"Script did not pass in block: {chainedHeader.Hash}, tx: {tx.Index}, {tx.Hash}, input: {txInputIndex}");
throw new ValidationException(chainedHeader.Hash);
}
}
public void TestSimpleSpend()
{
// prepare block
var fakeHeaders = new FakeHeaders();
var chainedHeader0 = fakeHeaders.GenesisChained();
var chainedHeader1 = fakeHeaders.NextChained();
var chainedHeader2 = fakeHeaders.NextChained();
var chain = new ChainBuilder();
var emptyCoinbaseTx0 = new Transaction(0, ImmutableArray.Create <TxInput>(), ImmutableArray.Create <TxOutput>(), 0);
var emptyCoinbaseTx1 = new Transaction(1, ImmutableArray.Create <TxInput>(), ImmutableArray.Create <TxOutput>(), 0);
var emptyCoinbaseTx2 = new Transaction(2, ImmutableArray.Create <TxInput>(), ImmutableArray.Create <TxOutput>(), 0);
// initialize memory utxo builder storage
var memoryStorage = new MemoryStorageManager();
var memoryChainStateCursor = memoryStorage.OpenChainStateCursor().Item;
// initialize utxo builder
var utxoBuilder = new UtxoBuilder(memoryChainStateCursor, LogManager.CreateNullLogger());
// prepare an unspent transaction
var txHash = new UInt256(100);
var unspentTx = new UnspentTx(txHash, chainedHeader0.Height, 0, 3, OutputState.Unspent);
// prepare unspent output
var unspentTransactions = ImmutableDictionary.Create <UInt256, UnspentTx>().Add(txHash, unspentTx);
// add the unspent transaction
memoryChainStateCursor.TryAddUnspentTx(unspentTx);
// create an input to spend the unspent transaction's first output
var input0 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 0), ImmutableArray.Create <byte>(), 0);
var tx0 = new Transaction(0, ImmutableArray.Create(input0), ImmutableArray.Create <TxOutput>(), 0);
// spend the input
chain.AddBlock(chainedHeader0);
utxoBuilder.CalculateUtxo(chain.ToImmutable(), new[] { emptyCoinbaseTx0, tx0 }).ToList();
// verify utxo storage
UnspentTx actualUnspentTx;
Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx));
Assert.IsTrue(actualUnspentTx.OutputStates.Length == 3);
Assert.IsTrue(actualUnspentTx.OutputStates[0] == OutputState.Spent);
Assert.IsTrue(actualUnspentTx.OutputStates[1] == OutputState.Unspent);
Assert.IsTrue(actualUnspentTx.OutputStates[2] == OutputState.Unspent);
// create an input to spend the unspent transaction's second output
var input1 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 1), ImmutableArray.Create <byte>(), 0);
var tx1 = new Transaction(0, ImmutableArray.Create(input1), ImmutableArray.Create <TxOutput>(), 0);
// spend the input
chain.AddBlock(chainedHeader1);
utxoBuilder.CalculateUtxo(chain.ToImmutable(), new[] { emptyCoinbaseTx1, tx1 }).ToList();
// verify utxo storage
Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx));
Assert.IsTrue(actualUnspentTx.OutputStates.Length == 3);
Assert.IsTrue(actualUnspentTx.OutputStates[0] == OutputState.Spent);
Assert.IsTrue(actualUnspentTx.OutputStates[1] == OutputState.Spent);
Assert.IsTrue(actualUnspentTx.OutputStates[2] == OutputState.Unspent);
// create an input to spend the unspent transaction's third output
var input2 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 2), ImmutableArray.Create <byte>(), 0);
var tx2 = new Transaction(0, ImmutableArray.Create(input2), ImmutableArray.Create <TxOutput>(), 0);
// spend the input
chain.AddBlock(chainedHeader2);
utxoBuilder.CalculateUtxo(chain.ToImmutable(), new[] { emptyCoinbaseTx2, tx2 }).ToList();
// verify utxo storage
Assert.IsFalse(memoryChainStateCursor.ContainsUnspentTx(txHash));
}
public void TestSimpleSpend()
{
// prepare test kernel
var kernel = new StandardKernel(new MemoryStorageModule());
// prepare block
var fakeHeaders = new FakeHeaders();
var chainedHeader = new ChainedHeader(fakeHeaders.Genesis(), height: 0, totalWork: 0);
// prepare an unspent transaction
var txHash = new UInt256(100);
var unspentTx = new UnspentTx(chainedHeader.Hash, 3, OutputState.Unspent);
// prepare unspent output
var unspentTransactions = ImmutableDictionary.Create <UInt256, UnspentTx>().Add(txHash, unspentTx);
var unspentOutputs = ImmutableDictionary.Create <TxOutputKey, TxOutput>()
.Add(new TxOutputKey(txHash, 0), new TxOutput(0, ImmutableArray.Create <byte>()))
.Add(new TxOutputKey(txHash, 1), new TxOutput(0, ImmutableArray.Create <byte>()))
.Add(new TxOutputKey(txHash, 2), new TxOutput(0, ImmutableArray.Create <byte>()));
// mock a parent utxo containing the unspent transaction
var mockParentChainStateStorage = new Mock <IChainStateStorage>();
mockParentChainStateStorage.Setup(utxo => utxo.UnspentTransactions()).Returns(unspentTransactions);
mockParentChainStateStorage.Setup(utxo => utxo.UnspentOutputs()).Returns(unspentOutputs);
var parentUtxo = new Utxo(mockParentChainStateStorage.Object);
// initialize memory utxo builder storage
var memoryChainStateBuilderStorage = new MemoryChainStateBuilderStorage(mockParentChainStateStorage.Object);
kernel.Rebind <IChainStateBuilderStorage>().ToConstant(memoryChainStateBuilderStorage);
// initialize utxo builder
var chainStateBuilder = new ChainStateBuilder(null, parentUtxo, LogManager.CreateNullLogger(), kernel, null, null, null, null, null);
// create an input to spend the unspent transaction's first output
var input0 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 0), ImmutableArray.Create <byte>(), 0);
var tx0 = new Transaction(0, ImmutableArray.Create(input0), ImmutableArray.Create <TxOutput>(), 0);
// spend the input
chainStateBuilder.Spend(0, tx0, 0, input0, chainedHeader);
// verify utxo storage
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary.ContainsKey(txHash));
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary[txHash].OutputStates.Length == 3);
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary[txHash].OutputStates[0] == OutputState.Spent);
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary[txHash].OutputStates[1] == OutputState.Unspent);
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary[txHash].OutputStates[2] == OutputState.Unspent);
// create an input to spend the unspent transaction's second output
var input1 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 1), ImmutableArray.Create <byte>(), 0);
var tx1 = new Transaction(0, ImmutableArray.Create(input1), ImmutableArray.Create <TxOutput>(), 0);
// spend the input
chainStateBuilder.Spend(1, tx1, 1, input1, chainedHeader);
// verify utxo storage
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary.ContainsKey(txHash));
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary[txHash].OutputStates.Length == 3);
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary[txHash].OutputStates[0] == OutputState.Spent);
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary[txHash].OutputStates[1] == OutputState.Spent);
Assert.IsTrue(memoryChainStateBuilderStorage.UnspentTransactionsDictionary[txHash].OutputStates[2] == OutputState.Unspent);
// create an input to spend the unspent transaction's third output
var input2 = new TxInput(new TxOutputKey(txHash, txOutputIndex: 2), ImmutableArray.Create <byte>(), 0);
var tx2 = new Transaction(0, ImmutableArray.Create(input2), ImmutableArray.Create <TxOutput>(), 0);
// spend the input
chainStateBuilder.Spend(2, tx2, 2, input2, chainedHeader);
// verify utxo storage
Assert.IsFalse(memoryChainStateBuilderStorage.UnspentTransactionsDictionary.ContainsKey(txHash));
}
private static ImmutableArray <byte> GetScriptFromInputPrevOutput(TxInput input, TxOutput prevOutput)
{
return(input.ScriptSignature.AddRange(prevOutput.ScriptPublicKey));
}
private static byte[] GetScriptFromInputPrevOutput(TxInput input, TxOutput prevOutput)
{
return(input.ScriptSignature.Concat(prevOutput.ScriptPublicKey).ToArray());
}
public virtual void UnCoinbaseInput(ChainPosition chainPosition, TxInput txInput)
{
}
public virtual void UnspendTxOutput(ChainPosition chainPosition, TxInput txInput, TxOutputKey txOutputKey, TxOutput txOutput, UInt256 outputScriptHash)
{
}
public void SpendTxOutput(ChainPosition chainPosition, ChainedHeader chainedHeader, Transaction tx, TxInput txInput, TxOutputKey txOutputKey, TxOutput txOutput, UInt256 outputScriptHash)
{
//this.Add(() =>
//{
foreach (var visitor in this.visitors)
{
visitor.SpendTxOutput(chainPosition, chainedHeader, tx, txInput, txOutputKey, txOutput, outputScriptHash);
}
//});
}
public void TestTransactionValidation_Transfer()
{
using (var context = CreateContext())
{
var sender = CreateAccount();
var receiver = CreateAccount();
// transaction cannot have duplicated signature
var transaction = Transfer(sender, receiver, Currency.BTC, 10);
transaction.Signatures.Add(transaction.Signatures.First());
context.SendTransaction(transaction, ResultCode.CannotReadSignedTransaction);
// transaction doesn't have required signature
transaction = Transfer(sender, receiver, Currency.BTC, 10);
transaction.Signatures.Clear();
context.SendTransaction(transaction, ResultCode.TransactionValidationFailed);
// wrong signature
receiver.SignTransaction(transaction, Network);
context.SendTransaction(transaction, ResultCode.TransactionValidationFailed);
// transaction have no inputs but have an output
transaction = Transfer(sender, receiver, Currency.BTC, 10);
transaction.Transaction.Inputs.Clear();
context.SendTransaction(transaction, ResultCode.TransactionValidationFailed);
// transaction have no outputs but have an input
transaction = Transfer(sender, receiver, Currency.BTC, 10);
transaction.Transaction.Outputs.Clear();
context.SendTransaction(transaction, ResultCode.TransactionValidationFailed);
// transaction have no inputs and outputs
transaction = Transfer(sender, receiver, Currency.BTC, 10);
transaction.Transaction.Inputs.Clear();
transaction.Transaction.Outputs.Clear();
context.SendTransaction(transaction, ResultCode.TransactionValidationFailed);
// amount in output more than amount in input
transaction = Transfer(sender, receiver, Currency.BTC, 10);
var output = transaction.Transaction.Outputs.First();
var modified = new TxOutput(output.Address, output.Currency, Amount.FromWholeDecimal(99999));
transaction.Transaction.Outputs.Clear();
transaction.Transaction.Outputs.Add(modified);
context.SendTransaction(transaction, ResultCode.TransactionValidationFailed);
// amount in input is negative
transaction = Transfer(sender, receiver, Currency.BTC, 10);
var input = transaction.Transaction.Inputs.First();
var modifiedInput = new TxInput(input.Address, input.Currency, Amount.FromWholeDecimal(-10));
transaction.Transaction.Inputs.Clear();
transaction.Transaction.Inputs.Add(modifiedInput);
context.SendTransaction(transaction, ResultCode.TransactionValidationFailed);
// fees are negative
transaction = Transfer(sender, receiver, Currency.BTC, 10);
var tx = transaction.Transaction;
transaction = new SignedTransaction(new Transaction(tx.Declarations, tx.Inputs, tx.Outputs, tx.Message, tx.Expire, new TxInput(sender.Address, Currency.BTC, -1)), transaction.Signatures);
context.SendTransaction(transaction, ResultCode.TransactionValidationFailed);
}
// context.SendTransaction(signedInvalid, ResultCode.CannotReadSignedTransaction);
}