public ChainStateBuilder(ICoreRules rules, ICoreStorage coreStorage, IStorageManager storageManager) { this.rules = rules; this.coreStorage = coreStorage; this.storageManager = storageManager; this.chain = new Lazy <Chain>(() => LoadChain()); this.stats = new ChainStateBuilderStats(); this.utxoBuilder = new UtxoBuilder(); }
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 = new BlockTx(0, new Transaction(0, ImmutableArray.Create<TxInput>(), ImmutableArray.Create<TxOutput>(), 0)); var emptyCoinbaseTx1 = new BlockTx(0, new Transaction(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, 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 BlockTx(1, new Transaction(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; Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx)); Assert.IsTrue(actualUnspentTx.IsFullySpent); // 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()); }
public ChainStateBuilder(Logger logger, IBlockchainRules rules, CoreStorage coreStorage) { this.logger = logger; this.sha256 = new SHA256Managed(); this.rules = rules; this.coreStorage = coreStorage; this.blockValidator = new BlockValidator(this.coreStorage, this.rules, this.logger); this.chainStateCursorHandle = coreStorage.OpenChainStateCursor(); this.chainStateCursor = this.chainStateCursorHandle.Item; this.chain = new ChainBuilder(chainStateCursor.ReadChain()); this.utxoBuilder = new UtxoBuilder(chainStateCursor, logger); this.commitLock = new ReaderWriterLockSlim(); this.stats = new BuilderStats(); }
public void TestSimpleSpend() { // prepare block var fakeHeaders = new FakeHeaders(); var chainedHeader0 = fakeHeaders.GenesisChained(); var chainedHeader1 = fakeHeaders.NextChained(); var chainedHeader2 = fakeHeaders.NextChained(); var chainedHeader3 = 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(1, Transaction.Create(1, ImmutableArray.Create<TxInput>(), ImmutableArray.Create<TxOutput>(), 0)); var emptyCoinbaseTx2 = BlockTx.Create(2, Transaction.Create(2, 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, 3, OutputState.Unspent); var txOutput1Key = new TxOutputKey(txHash, 0); var txOutput1 = new TxOutput(0, ImmutableArray<byte>.Empty); var txOutput2Key = new TxOutputKey(txHash, 1); var txOutput2 = new TxOutput(1, ImmutableArray<byte>.Empty); var txOutput3Key = new TxOutputKey(txHash, 2); var txOutput3 = new TxOutput(2, ImmutableArray<byte>.Empty); // prepare unspent output var unspentTransactions = ImmutableDictionary.Create<UInt256, UnspentTx>().Add(txHash, unspentTx); // add the unspent transaction memoryChainStateCursor.TryAddUnspentTx(unspentTx); memoryChainStateCursor.TryAddUnspentTxOutput(txOutput1Key, txOutput1); memoryChainStateCursor.TryAddUnspentTxOutput(txOutput2Key, txOutput2); memoryChainStateCursor.TryAddUnspentTxOutput(txOutput3Key, txOutput3); // create an input to spend the unspent transaction's first output var input0 = new TxInput(txHash, 0, ImmutableArray.Create<byte>(), 0); var tx0 = BlockTx.Create(1, Transaction.Create(0, ImmutableArray.Create(input0), ImmutableArray.Create<TxOutput>(), 0)); // spend the input chain.AddBlock(chainedHeader1); utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx0, tx0 }.ToBufferBlock()).ToEnumerable().ToList(); // verify utxo storage UnspentTx actualUnspentTx; TxOutput actualTxOutput; 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); Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTxOutput(txOutput1Key, out actualTxOutput)); Assert.AreEqual(txOutput1, actualTxOutput); Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTxOutput(txOutput2Key, out actualTxOutput)); Assert.AreEqual(txOutput2, actualTxOutput); Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTxOutput(txOutput3Key, out actualTxOutput)); Assert.AreEqual(txOutput3, actualTxOutput); // create an input to spend the unspent transaction's second output var input1 = new TxInput(txHash, 1, ImmutableArray.Create<byte>(), 0); var tx1 = BlockTx.Create(1, Transaction.Create(0, ImmutableArray.Create(input1), ImmutableArray.Create<TxOutput>(), 0)); // spend the input chain.AddBlock(chainedHeader2); utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx1, tx1 }.ToBufferBlock()).ToEnumerable().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(txHash, 2, ImmutableArray.Create<byte>(), 0); var tx2 = BlockTx.Create(2, Transaction.Create(0, ImmutableArray.Create(input2), ImmutableArray.Create<TxOutput>(), 0)); // spend the input chain.AddBlock(chainedHeader3); utxoBuilder.CalculateUtxo(memoryChainStateCursor, chain.ToImmutable(), new[] { emptyCoinbaseTx2, tx2 }.ToBufferBlock()).ToEnumerable().ToList(); // verify utxo storage Assert.IsTrue(memoryChainStateCursor.TryGetUnspentTx(txHash, out actualUnspentTx)); Assert.IsTrue(actualUnspentTx.IsFullySpent); }