@Test
public void validateGenesisBlock() {
// CREATE EMPTY DATABASE
DBSet databaseSet = DBSet.createEmptyDatabaseSet();
// CREATE GENESIS BLOCK
Block genesisBlock = new GenesisBlock();
// CHECK IF VALID
assertEquals(true, genesisBlock.isValid(databaseSet));
// ADD INVALID GENESIS TRANSACTION
Transaction transaction =
new GenesisTransaction(
new Account("XUi2oga2pnGNcZ9es6pBqxydtRZKWdkL2g"),
BigDecimal.valueOf(-1000).setScale(8),
NTP.getTime());
genesisBlock.addTransaction(transaction);
// CHECK IF INVALID
assertEquals(false, genesisBlock.isValid(databaseSet));
// CREATE NEW BLOCK
genesisBlock = new GenesisBlock();
// CHECK IF VALID
assertEquals(true, genesisBlock.isValid(databaseSet));
// PROCESS
genesisBlock.process(databaseSet);
// CHECK IF INVALID
assertEquals(false, genesisBlock.isValid(databaseSet));
}
public void orphan(DBSet db) {
// ORPHAN AT TRANSACTIONS
LinkedHashMap<Tuple2<Integer, Integer>, AT_Transaction> atTxs =
DBSet.getInstance().getATTransactionMap().getATTransactions(this.getHeight(db));
Iterator<AT_Transaction> iter = atTxs.values().iterator();
while (iter.hasNext()) {
AT_Transaction key = iter.next();
Long amount = key.getAmount();
if (key.getRecipientId() != null
&& !Arrays.equals(key.getRecipientId(), new byte[AT_Constants.AT_ID_SIZE])
&& !key.getRecipient().equalsIgnoreCase("1")) {
Account recipient = new Account(key.getRecipient());
recipient.setConfirmedBalance(
recipient.getConfirmedBalance(db).subtract(BigDecimal.valueOf(amount, 8)), db);
if (Arrays.equals(recipient.getLastReference(db), new byte[64])) {
recipient.removeReference(db);
}
}
Account sender = new Account(key.getSender());
sender.setConfirmedBalance(
sender.getConfirmedBalance(db).add(BigDecimal.valueOf(amount, 8)), db);
}
// ORPHAN TRANSACTIONS
this.orphanTransactions(this.getTransactions(), db);
// REMOVE FEE
BigDecimal blockFee = this.getTotalFee();
if (blockFee.compareTo(BigDecimal.ZERO) == 1) {
// UPDATE GENERATOR BALANCE WITH FEE
this.generator.setConfirmedBalance(
this.generator.getConfirmedBalance(db).subtract(blockFee), db);
}
// DELETE AT TRANSACTIONS FROM DB
db.getATTransactionMap().delete(this.getHeight(db));
// DELETE TRANSACTIONS FROM FINAL MAP
db.getTransactionFinalMap().delete(this.getHeight(db));
// DELETE BLOCK FROM DB
db.getBlockMap().delete(this);
// SET PARENT AS LAST BLOCK
db.getBlockMap().setLastBlock(this.getParent(db));
for (Transaction transaction : this.getTransactions()) {
// ADD ORPHANED TRANASCTIONS BACK TO DATABASE
db.getTransactionMap().add(transaction);
// DELETE ORPHANED TRANASCTIONS FROM PARENT DATABASE
db.getTransactionParentMap().delete(transaction.getSignature());
}
}
@Test
public void orphanBlock() {
// CREATE EMPTY MEMORY DATABASE
DBSet databaseSet = DBSet.createEmptyDatabaseSet();
// PROCESS GENESISBLOCK
GenesisBlock genesisBlock = new GenesisBlock();
genesisBlock.process(databaseSet);
// CREATE KNOWN ACCOUNT
byte[] seed = Crypto.getInstance().digest("test".getBytes());
byte[] privateKey = Crypto.getInstance().createKeyPair(seed).getA();
PrivateKeyAccount generator = new PrivateKeyAccount(privateKey);
// PROCESS GENESIS TRANSACTION TO MAKE SURE GENERATOR HAS FUNDS
Transaction transaction =
new GenesisTransaction(generator, BigDecimal.valueOf(1000).setScale(8), NTP.getTime());
transaction.process(databaseSet);
// GENERATE NEXT BLOCK
BlockGenerator blockGenerator = new BlockGenerator();
Block block = blockGenerator.generateNextBlock(databaseSet, generator, genesisBlock);
// FORK
DBSet fork = databaseSet.fork();
// GENERATE PAYMENT 1
Account recipient = new Account("XUi2oga2pnGNcZ9es6pBqxydtRZKWdkL2g");
long timestamp = block.getTimestamp();
byte[] signature =
PaymentTransaction.generateSignature(
databaseSet,
generator,
recipient,
BigDecimal.valueOf(100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp);
Transaction payment1 =
new PaymentTransaction(
generator,
recipient,
BigDecimal.valueOf(100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp,
generator.getLastReference(databaseSet),
signature);
payment1.process(fork);
block.addTransaction(payment1);
// GENERATE PAYMENT 2
Account recipient2 = new Account("XLPYYfxKEiDcybCkFA7jXcxSdePMMoyZLt");
signature =
PaymentTransaction.generateSignature(
fork,
generator,
recipient2,
BigDecimal.valueOf(100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp);
Transaction payment2 =
new PaymentTransaction(
generator,
recipient2,
BigDecimal.valueOf(100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp,
generator.getLastReference(fork),
signature);
block.addTransaction(payment2);
// ADD TRANSACTION SIGNATURE
byte[] transactionsSignature = blockGenerator.calculateTransactionsSignature(block, generator);
block.setTransactionsSignature(transactionsSignature);
// CHECK VALID
assertEquals(true, block.isSignatureValid());
assertEquals(true, block.isValid(databaseSet));
// PROCESS BLOCK
block.process(databaseSet);
// ORPHAN BLOCK
block.orphan(databaseSet);
// CHECK BALANCE GENERATOR
assertEquals(
true, generator.getConfirmedBalance(databaseSet).compareTo(BigDecimal.valueOf(1000)) == 0);
// CHECK LAST REFERENCE GENERATOR
assertEquals(
true, Arrays.equals(generator.getLastReference(databaseSet), transaction.getSignature()));
// CHECK BALANCE RECIPIENT
assertEquals(
true, recipient.getConfirmedBalance(databaseSet).compareTo(BigDecimal.valueOf(1000)) == 0);
// CHECK LAST REFERENCE RECIPIENT
assertEquals(
false, Arrays.equals(recipient.getLastReference(databaseSet), payment1.getSignature()));
// CHECK BALANCE RECIPIENT2
assertEquals(
true, recipient2.getConfirmedBalance(databaseSet).compareTo(BigDecimal.valueOf(0)) == 0);
// CHECK LAST REFERENCE RECIPIENT
assertEquals(true, Arrays.equals(recipient2.getLastReference(databaseSet), new byte[0]));
// CHECK LAST BLOCK
assertEquals(
true,
Arrays.equals(
genesisBlock.getSignature(), databaseSet.getBlockMap().getLastBlock().getSignature()));
}
@Test
public void parseBlock() {
// CREATE EMPTY MEMORY DATABASE
DBSet databaseSet = DBSet.createEmptyDatabaseSet();
// PROCESS GENESISBLOCK
GenesisBlock genesisBlock = new GenesisBlock();
genesisBlock.process(databaseSet);
// CREATE KNOWN ACCOUNT
byte[] seed = Crypto.getInstance().digest("test".getBytes());
byte[] privateKey = Crypto.getInstance().createKeyPair(seed).getA();
PrivateKeyAccount generator = new PrivateKeyAccount(privateKey);
// PROCESS GENESIS TRANSACTION TO MAKE SURE GENERATOR HAS FUNDS
Transaction transaction =
new GenesisTransaction(generator, BigDecimal.valueOf(1000).setScale(8), NTP.getTime());
transaction.process(databaseSet);
// GENERATE NEXT BLOCK
BlockGenerator blockGenerator = new BlockGenerator();
Block block = blockGenerator.generateNextBlock(databaseSet, generator, genesisBlock);
// FORK
DBSet fork = databaseSet.fork();
// GENERATE PAYMENT 1
Account recipient = new Account("XUi2oga2pnGNcZ9es6pBqxydtRZKWdkL2g");
long timestamp = block.getTimestamp();
byte[] signature =
PaymentTransaction.generateSignature(
databaseSet,
generator,
recipient,
BigDecimal.valueOf(100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp);
Transaction payment1 =
new PaymentTransaction(
generator,
recipient,
BigDecimal.valueOf(100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp,
generator.getLastReference(databaseSet),
signature);
payment1.process(fork);
block.addTransaction(payment1);
// GENERATE PAYMENT 2
Account recipient2 = new Account("XLPYYfxKEiDcybCkFA7jXcxSdePMMoyZLt");
signature =
PaymentTransaction.generateSignature(
fork,
generator,
recipient2,
BigDecimal.valueOf(100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp);
Transaction payment2 =
new PaymentTransaction(
generator,
recipient2,
BigDecimal.valueOf(100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp,
generator.getLastReference(fork),
signature);
block.addTransaction(payment2);
// ADD TRANSACTION SIGNATURE
byte[] transactionsSignature =
Crypto.getInstance().sign(generator, block.getGeneratorSignature());
block.setTransactionsSignature(transactionsSignature);
// CONVERT TO BYTES
byte[] rawBlock = block.toBytes();
try {
// PARSE FROM BYTES
Block parsedBlock = BlockFactory.getInstance().parse(rawBlock);
// CHECK INSTANCE
assertEquals(false, parsedBlock instanceof GenesisBlock);
// CHECK SIGNATURE
assertEquals(true, Arrays.equals(block.getSignature(), parsedBlock.getSignature()));
// CHECK GENERATOR
assertEquals(block.getGenerator().getAddress(), parsedBlock.getGenerator().getAddress());
// CHECK BASE TARGET
assertEquals(block.getGeneratingBalance(), parsedBlock.getGeneratingBalance());
// CHECK FEE
assertEquals(block.getTotalFee(), parsedBlock.getTotalFee());
// CHECK REFERENCE
assertEquals(true, Arrays.equals(block.getReference(), parsedBlock.getReference()));
// CHECK TIMESTAMP
assertEquals(block.getTimestamp(), parsedBlock.getTimestamp());
// CHECK TRANSACTIONS COUNT
assertEquals(block.getTransactionCount(), parsedBlock.getTransactionCount());
} catch (Exception e) {
fail("Exception while parsing transaction.");
}
// PARSE TRANSACTION FROM WRONG BYTES
rawBlock = new byte[50];
try {
// PARSE FROM BYTES
BlockFactory.getInstance().parse(rawBlock);
// FAIL
fail("this should throw an exception");
} catch (Exception e) {
// EXCEPTION IS THROWN OKE
}
}
@Test
public void validateBlock() {
// CREATE EMPTY MEMORY DATABASE
DBSet databaseSet = DBSet.createEmptyDatabaseSet();
// PROCESS GENESISBLOCK
GenesisBlock genesisBlock = new GenesisBlock();
genesisBlock.process(databaseSet);
// CREATE KNOWN ACCOUNT
byte[] seed = Crypto.getInstance().digest("test".getBytes());
byte[] privateKey = Crypto.getInstance().createKeyPair(seed).getA();
PrivateKeyAccount generator = new PrivateKeyAccount(privateKey);
// PROCESS GENESIS TRANSACTION TO MAKE SURE GENERATOR HAS FUNDS
Transaction transaction =
new GenesisTransaction(generator, BigDecimal.valueOf(1000).setScale(8), NTP.getTime());
transaction.process(databaseSet);
// GENERATE NEXT BLOCK
BlockGenerator blockGenerator = new BlockGenerator();
Block newBlock = blockGenerator.generateNextBlock(databaseSet, generator, genesisBlock);
// ADD TRANSACTION SIGNATURE
byte[] transactionsSignature =
Crypto.getInstance().sign(generator, newBlock.getGeneratorSignature());
newBlock.setTransactionsSignature(transactionsSignature);
// CHECK IF VALID
assertEquals(true, newBlock.isValid(databaseSet));
// CHANGE REFERENCE
Block invalidBlock =
BlockFactory.getInstance()
.create(
newBlock.getVersion(),
new byte[128],
newBlock.getTimestamp(),
newBlock.getGeneratingBalance(),
newBlock.getGenerator(),
newBlock.getGeneratorSignature());
// CHECK IF INVALID
assertEquals(false, invalidBlock.isValid(databaseSet));
// CHANGE TIMESTAMP
invalidBlock =
BlockFactory.getInstance()
.create(
newBlock.getVersion(),
newBlock.getReference(),
1L,
newBlock.getGeneratingBalance(),
newBlock.getGenerator(),
newBlock.getGeneratorSignature());
// CHECK IF INVALID
assertEquals(false, invalidBlock.isValid(databaseSet));
// CHANGE BASETARGET
invalidBlock =
BlockFactory.getInstance()
.create(
newBlock.getVersion(),
newBlock.getReference(),
newBlock.getTimestamp(),
1L,
newBlock.getGenerator(),
newBlock.getGeneratorSignature());
// CHECK IF INVALID
assertEquals(false, invalidBlock.isValid(databaseSet));
// ADD INVALID TRANSACTION
invalidBlock = blockGenerator.generateNextBlock(databaseSet, generator, genesisBlock);
Account recipient = new Account("XUi2oga2pnGNcZ9es6pBqxydtRZKWdkL2g");
long timestamp = newBlock.getTimestamp();
byte[] signature =
PaymentTransaction.generateSignature(
databaseSet,
generator,
recipient,
BigDecimal.valueOf(-100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp);
Transaction payment =
new PaymentTransaction(
generator,
recipient,
BigDecimal.valueOf(-100).setScale(8),
BigDecimal.valueOf(1).setScale(8),
timestamp,
generator.getLastReference(databaseSet),
signature);
invalidBlock.addTransaction(payment);
// CHECK IF INVALID
assertEquals(false, invalidBlock.isValid(databaseSet));
// ADD GENESIS TRANSACTION
invalidBlock = blockGenerator.generateNextBlock(databaseSet, generator, genesisBlock);
transaction =
new GenesisTransaction(
generator, BigDecimal.valueOf(1000).setScale(8), newBlock.getTimestamp());
invalidBlock.addTransaction(transaction);
// CHECK IF INVALID
assertEquals(false, invalidBlock.isValid(databaseSet));
}
public void process(DBSet db) {
// PROCESS TRANSACTIONS
for (Transaction transaction : this.getTransactions()) {
// PROCESS
transaction.process(db);
// SET PARENT
db.getTransactionParentMap().set(transaction, this);
// REMOVE FROM UNCONFIRMED DATABASE
db.getTransactionMap().delete(transaction);
}
// DELETE CONFIRMED TRANSACTIONS FROM UNCONFIRMED TRANSACTIONS LIST
List<Transaction> unconfirmedTransactions =
new ArrayList<Transaction>(db.getTransactionMap().getValues());
for (Transaction transaction : unconfirmedTransactions) {
if (db.getTransactionParentMap().contains(transaction.getSignature())) {
db.getTransactionMap().delete(transaction);
}
}
// PROCESS FEE
BigDecimal blockFee = this.getTotalFee();
if (blockFee.compareTo(BigDecimal.ZERO) == 1) {
// UPDATE GENERATOR BALANCE WITH FEE
this.generator.setConfirmedBalance(this.generator.getConfirmedBalance(db).add(blockFee), db);
}
Block parent = this.getParent(db);
int height = 1;
if (parent != null) {
// SET AS CHILD OF PARENT
db.getChildMap().set(parent, this);
// SET BLOCK HEIGHT
height = parent.getHeight(db) + 1;
db.getHeightMap().set(this, height);
} else {
// IF NO PARENT HEIGHT IS 1
db.getHeightMap().set(this, 1);
}
// PROCESS TRANSACTIONS
int seq = 1;
for (Transaction transaction : this.getTransactions()) {
db.getTransactionFinalMap().add(height, seq, transaction);
seq++;
}
// ADD TO DB
db.getBlockMap().add(this);
// UPDATE LAST BLOCK
db.getBlockMap().setLastBlock(this);
}
public void orphan() {
this.orphan(DBSet.getInstance());
}
public boolean isValid(DBSet db) {
// CHECK IF PARENT EXISTS
if (this.reference == null || this.getParent(db) == null) {
return false;
}
// CHECK IF TIMESTAMP IS VALID -500 MS ERROR MARGIN TIME
if (this.timestamp - 500 > NTP.getTime() || this.timestamp < this.getParent(db).timestamp) {
return false;
}
// CHECK IF TIMESTAMP REST SAME AS PARENT TIMESTAMP REST
if (this.timestamp % 1000 != this.getParent(db).timestamp % 1000) {
return false;
}
// CHECK IF GENERATING BALANCE IS CORRECT
if (this.generatingBalance
!= BlockGenerator.getNextBlockGeneratingBalance(db, this.getParent(db))) {
return false;
}
// CHECK IF VERSION IS CORRECT
if (this.version != this.getParent(db).getNextBlockVersion(db)) {
return false;
}
if (this.version < 2 && (this.atBytes.length > 0 || this.atFees != 0)) {
return false;
}
// CREATE TARGET
byte[] targetBytes = new byte[32];
Arrays.fill(targetBytes, Byte.MAX_VALUE);
BigInteger target = new BigInteger(1, targetBytes);
// DIVIDE TARGET BY BASE TARGET
BigInteger baseTarget =
BigInteger.valueOf(BlockGenerator.getBaseTarget(this.generatingBalance));
target = target.divide(baseTarget);
// MULTIPLY TARGET BY USER BALANCE
target = target.multiply(this.generator.getGeneratingBalance(db).toBigInteger());
// MULTIPLE TARGET BY GUESSES
long guesses = (this.timestamp - this.getParent(db).getTimestamp()) / 1000;
BigInteger lowerTarget = target.multiply(BigInteger.valueOf(guesses - 1));
target = target.multiply(BigInteger.valueOf(guesses));
// CONVERT PROOF HASH TO BIGINT
BigInteger hashValue = new BigInteger(1, getProofHash());
// CHECK IF HASH LOWER THEN TARGET
if (hashValue.compareTo(target) >= 0) {
return false;
}
// CHECK IF FIRST BLOCK OF USER
if (hashValue.compareTo(lowerTarget) < 0) {
return false;
}
if (this.atBytes != null && this.atBytes.length > 0) {
try {
AT_Block atBlock =
AT_Controller.validateATs(
this.getBlockATs(), db.getBlockMap().getLastBlock().getHeight(db) + 1, db);
this.atFees = atBlock.getTotalFees();
} catch (NoSuchAlgorithmException | AT_Exception e) {
e.printStackTrace();
return false;
}
}
// CHECK TRANSACTIONS
DBSet fork = db.fork();
for (Transaction transaction : this.getTransactions()) {
// CHECK IF NOT GENESISTRANSACTION
if (transaction instanceof GenesisTransaction) {
return false;
}
Integer min = 0;
if (db.getBlockMap().getParentList() != null) {
min = AT_API_Platform_Impl.getForkHeight(db);
}
// CHECK IF VALID
if (transaction instanceof DeployATTransaction) {
DeployATTransaction atTx = (DeployATTransaction) transaction;
if (atTx.isValid(fork, min) != Transaction.VALIDATE_OK) {
return false;
}
} else if (transaction.isValid(fork) != Transaction.VALIDATE_OK) {
return false;
}
// CHECK TIMESTAMP AND DEADLINE
if (transaction.getTimestamp() > this.timestamp
|| transaction.getDeadline() <= this.timestamp) {
return false;
}
// PROCESS TRANSACTION IN MEMORYDB TO MAKE SURE OTHER TRANSACTIONS VALIDATE PROPERLY
transaction.process(fork);
}
// BLOCK IS VALID
return true;
}
public void process() {
this.process(DBSet.getInstance());
}
public int getHeight(DBSet db) {
if (db.getHeightMap().contains(this.getSignature())) return db.getHeightMap().get(this);
else return -1;
}
public boolean isValid() {
return this.isValid(DBSet.getInstance());
}
public int getHeight() {
return this.getHeight(DBSet.getInstance());
}
public Block getChild(DBSet db) {
return db.getChildMap().get(this);
}
public Block getChild() {
return this.getChild(DBSet.getInstance());
}
public Block getParent(DBSet db) {
return db.getBlockMap().get(this.reference);
}
public Block getParent() {
return this.getParent(DBSet.getInstance());
}