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Core.cpp
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Core.cpp
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// Copyright (c) 2012-2017, The CryptoNote developers, The Bytecoin developers
//
// This file is part of Bytecoin.
//
// Bytecoin is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Bytecoin is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
#include <algorithm>
#include <numeric>
#include <set>
#include <unordered_set>
#include "Core.h"
#include "Common/ShuffleGenerator.h"
#include "Common/Math.h"
#include "Common/MemoryInputStream.h"
#include "CryptoNoteTools.h"
#include "CryptoNoteFormatUtils.h"
#include "BlockchainCache.h"
#include "BlockchainStorage.h"
#include "BlockchainUtils.h"
#include "CryptoNoteCore/ITimeProvider.h"
#include "CryptoNoteCore/CoreErrors.h"
#include "CryptoNoteCore/MemoryBlockchainStorage.h"
#include "CryptoNoteCore/TransactionExtra.h"
#include "CryptoNoteCore/TransactionPool.h"
#include "CryptoNoteCore/TransactionPoolCleaner.h"
#include "CryptoNoteCore/UpgradeManager.h"
#include "CryptoNoteProtocol/CryptoNoteProtocolHandlerCommon.h"
#include <System/Timer.h>
#include "TransactionApi.h"
using namespace Crypto;
namespace CryptoNote {
namespace {
template <class T>
std::vector<T> preallocateVector(size_t elements) {
std::vector<T> vect;
vect.reserve(elements);
return vect;
}
UseGenesis addGenesisBlock = UseGenesis(true);
class TransactionSpentInputsChecker {
public:
bool haveSpentInputs(const Transaction& transaction) {
for (const auto& input : transaction.inputs) {
if (input.type() == typeid(KeyInput)) {
auto inserted = alreadSpentKeyImages.insert(boost::get<KeyInput>(input).keyImage);
if (!inserted.second) {
return true;
}
} else if (input.type() == typeid(MultisignatureInput)) {
const auto& multisignature = boost::get<MultisignatureInput>(input);
auto inserted =
alreadySpentMultisignatures.insert(std::make_pair(multisignature.amount, multisignature.outputIndex));
if (!inserted.second) {
return true;
}
}
}
return false;
}
private:
std::unordered_set<Crypto::KeyImage> alreadSpentKeyImages;
std::set<std::pair<uint64_t, uint64_t>> alreadySpentMultisignatures;
};
inline IBlockchainCache* findIndexInChain(IBlockchainCache* blockSegment, const Crypto::Hash& blockHash) {
assert(blockSegment != nullptr);
while (blockSegment != nullptr) {
if (blockSegment->hasBlock(blockHash)) {
return blockSegment;
}
blockSegment = blockSegment->getParent();
}
return nullptr;
}
inline IBlockchainCache* findIndexInChain(IBlockchainCache* blockSegment, uint32_t blockIndex) {
assert(blockSegment != nullptr);
while (blockSegment != nullptr) {
if (blockIndex >= blockSegment->getStartBlockIndex() &&
blockIndex < blockSegment->getStartBlockIndex() + blockSegment->getBlockCount()) {
return blockSegment;
}
blockSegment = blockSegment->getParent();
}
return nullptr;
}
size_t getMaximumTransactionAllowedSize(size_t blockSizeMedian, const Currency& currency) {
assert(blockSizeMedian * 2 > currency.minerTxBlobReservedSize());
return blockSizeMedian * 2 - currency.minerTxBlobReservedSize();
}
BlockTemplate extractBlockTemplate(const RawBlock& block) {
BlockTemplate blockTemplate;
if (!fromBinaryArray(blockTemplate, block.block)) {
throw std::system_error(make_error_code(error::AddBlockErrorCode::DESERIALIZATION_FAILED));
}
return blockTemplate;
}
Crypto::Hash getBlockHash(const RawBlock& block) {
BlockTemplate blockTemplate = extractBlockTemplate(block);
return CachedBlock(blockTemplate).getBlockHash();
}
TransactionValidatorState extractSpentOutputs(const CachedTransaction& transaction) {
TransactionValidatorState spentOutputs;
const auto& cryptonoteTransaction = transaction.getTransaction();
for (const auto& input : cryptonoteTransaction.inputs) {
if (input.type() == typeid(KeyInput)) {
const KeyInput& in = boost::get<KeyInput>(input);
bool r = spentOutputs.spentKeyImages.insert(in.keyImage).second;
assert(r);
} else if (input.type() == typeid(MultisignatureInput)) {
const MultisignatureInput& in = boost::get<MultisignatureInput>(input);
bool r = spentOutputs.spentMultisignatureGlobalIndexes.insert(std::make_pair(in.amount, in.outputIndex)).second;
assert(r);
} else {
assert(false);
}
}
return spentOutputs;
}
TransactionValidatorState extractSpentOutputs(const std::vector<CachedTransaction>& transactions) {
TransactionValidatorState resultOutputs;
for (const auto& transaction: transactions) {
auto transactionOutputs = extractSpentOutputs(transaction);
mergeStates(resultOutputs, transactionOutputs);
}
return resultOutputs;
}
int64_t getEmissionChange(const Currency& currency, IBlockchainCache& segment, uint32_t previousBlockIndex,
const CachedBlock& cachedBlock, uint64_t cumulativeSize, uint64_t cumulativeFee) {
uint64_t reward = 0;
int64_t emissionChange = 0;
auto alreadyGeneratedCoins = segment.getAlreadyGeneratedCoins(previousBlockIndex);
auto lastBlocksSizes = segment.getLastBlocksSizes(currency.rewardBlocksWindow(), previousBlockIndex, addGenesisBlock);
auto blocksSizeMedian = Common::medianValue(lastBlocksSizes);
if (!currency.getBlockReward(cachedBlock.getBlock().majorVersion, blocksSizeMedian,
cumulativeSize, alreadyGeneratedCoins, cumulativeFee, reward, emissionChange)) {
throw std::system_error(make_error_code(error::BlockValidationError::CUMULATIVE_BLOCK_SIZE_TOO_BIG));
}
return emissionChange;
}
uint32_t findCommonRoot(IMainChainStorage& storage, IBlockchainCache& rootSegment) {
assert(storage.getBlockCount());
assert(rootSegment.getBlockCount());
assert(rootSegment.getStartBlockIndex() == 0);
assert(getBlockHash(storage.getBlockByIndex(0)) == rootSegment.getBlockHash(0));
uint32_t left = 0;
uint32_t right = std::min(storage.getBlockCount() - 1, rootSegment.getBlockCount() - 1);
while (left != right) {
assert(right >= left);
uint32_t checkElement = left + (right - left) / 2 + 1;
if (getBlockHash(storage.getBlockByIndex(checkElement)) == rootSegment.getBlockHash(checkElement)) {
left = checkElement;
} else {
right = checkElement - 1;
}
}
return left;
}
const std::chrono::seconds OUTDATED_TRANSACTION_POLLING_INTERVAL = std::chrono::seconds(60);
}
Core::Core(const Currency& currency, Logging::ILogger& logger, Checkpoints&& checkpoints, System::Dispatcher& dispatcher,
std::unique_ptr<IBlockchainCacheFactory>&& blockchainCacheFactory, std::unique_ptr<IMainChainStorage>&& mainchainStorage)
: currency(currency), dispatcher(dispatcher), contextGroup(dispatcher), logger(logger, "Core"), checkpoints(std::move(checkpoints)),
upgradeManager(new UpgradeManager()), blockchainCacheFactory(std::move(blockchainCacheFactory)),
mainChainStorage(std::move(mainchainStorage)), initialized(false) {
upgradeManager->addMajorBlockVersion(BLOCK_MAJOR_VERSION_2, currency.upgradeHeight(BLOCK_MAJOR_VERSION_2));
upgradeManager->addMajorBlockVersion(BLOCK_MAJOR_VERSION_3, currency.upgradeHeight(BLOCK_MAJOR_VERSION_3));
upgradeManager->addMajorBlockVersion(BLOCK_MAJOR_VERSION_4, currency.upgradeHeight(BLOCK_MAJOR_VERSION_4));
transactionPool = std::unique_ptr<ITransactionPoolCleanWrapper>(new TransactionPoolCleanWrapper(
std::unique_ptr<ITransactionPool>(new TransactionPool(logger)),
std::unique_ptr<ITimeProvider>(new RealTimeProvider()),
logger,
currency.mempoolTxLiveTime()));
}
Core::~Core() {
contextGroup.interrupt();
contextGroup.wait();
}
bool Core::addMessageQueue(MessageQueue<BlockchainMessage>& messageQueue) {
return queueList.insert(messageQueue);
}
bool Core::removeMessageQueue(MessageQueue<BlockchainMessage>& messageQueue) {
return queueList.remove(messageQueue);
}
bool Core::notifyObservers(BlockchainMessage&& msg) /* noexcept */ {
try {
for (auto& queue : queueList) {
queue.push(std::move(msg));
}
return true;
} catch (std::exception& e) {
logger(Logging::WARNING) << "failed to notify observers: " << e.what();
return false;
}
}
uint32_t Core::getTopBlockIndex() const {
assert(!chainsStorage.empty());
assert(!chainsLeaves.empty());
throwIfNotInitialized();
return chainsLeaves[0]->getTopBlockIndex();
}
Crypto::Hash Core::getTopBlockHash() const {
assert(!chainsStorage.empty());
assert(!chainsLeaves.empty());
throwIfNotInitialized();
return chainsLeaves[0]->getTopBlockHash();
}
Crypto::Hash Core::getBlockHashByIndex(uint32_t blockIndex) const {
assert(!chainsStorage.empty());
assert(!chainsLeaves.empty());
assert(blockIndex <= getTopBlockIndex());
throwIfNotInitialized();
return chainsLeaves[0]->getBlockHash(blockIndex);
}
uint64_t Core::getBlockTimestampByIndex(uint32_t blockIndex) const {
assert(!chainsStorage.empty());
assert(!chainsLeaves.empty());
assert(blockIndex <= getTopBlockIndex());
throwIfNotInitialized();
auto timestamps = chainsLeaves[0]->getLastTimestamps(1, blockIndex, addGenesisBlock);
assert(!(timestamps.size() == 1));
return timestamps[0];
}
bool Core::hasBlock(const Crypto::Hash& blockHash) const {
throwIfNotInitialized();
return findSegmentContainingBlock(blockHash) != nullptr;
}
BlockTemplate Core::getBlockByIndex(uint32_t index) const {
assert(!chainsStorage.empty());
assert(!chainsLeaves.empty());
assert(index <= getTopBlockIndex());
throwIfNotInitialized();
IBlockchainCache* segment = findMainChainSegmentContainingBlock(index);
assert(segment != nullptr);
return restoreBlockTemplate(segment, index);
}
BlockTemplate Core::getBlockByHash(const Crypto::Hash& blockHash) const {
assert(!chainsStorage.empty());
assert(!chainsLeaves.empty());
throwIfNotInitialized();
IBlockchainCache* segment =
findMainChainSegmentContainingBlock(blockHash); // TODO should it be requested from the main chain?
if (segment == nullptr) {
throw std::runtime_error("Requested hash wasn't found in main blockchain");
}
uint32_t blockIndex = segment->getBlockIndex(blockHash);
return restoreBlockTemplate(segment, blockIndex);
}
std::vector<Crypto::Hash> Core::buildSparseChain() const {
throwIfNotInitialized();
Crypto::Hash topBlockHash = chainsLeaves[0]->getTopBlockHash();
return doBuildSparseChain(topBlockHash);
}
std::vector<RawBlock> Core::getBlocks(uint32_t minIndex, uint32_t count) const {
assert(!chainsStorage.empty());
assert(!chainsLeaves.empty());
throwIfNotInitialized();
std::vector<RawBlock> blocks;
if (count > 0) {
auto cache = chainsLeaves[0];
auto maxIndex = std::min(minIndex + count - 1, cache->getTopBlockIndex());
blocks.reserve(count);
while (cache) {
if (cache->getTopBlockIndex() >= maxIndex) {
auto minChainIndex = std::max(minIndex, cache->getStartBlockIndex());
for (; minChainIndex <= maxIndex; --maxIndex) {
blocks.emplace_back(cache->getBlockByIndex(maxIndex));
if (maxIndex == 0) {
break;
}
}
}
if (blocks.size() == count) {
break;
}
cache = cache->getParent();
}
}
std::reverse(blocks.begin(), blocks.end());
return blocks;
}
void Core::getBlocks(const std::vector<Crypto::Hash>& blockHashes, std::vector<RawBlock>& blocks,
std::vector<Crypto::Hash>& missedHashes) const {
throwIfNotInitialized();
for (const auto& hash : blockHashes) {
IBlockchainCache* blockchainSegment = findSegmentContainingBlock(hash);
if (blockchainSegment == nullptr) {
missedHashes.push_back(hash);
} else {
uint32_t blockIndex = blockchainSegment->getBlockIndex(hash);
assert(blockIndex <= blockchainSegment->getTopBlockIndex());
blocks.push_back(blockchainSegment->getBlockByIndex(blockIndex));
}
}
}
void Core::copyTransactionsToPool(IBlockchainCache* alt) {
assert(alt != nullptr);
while (alt != nullptr) {
if (mainChainSet.count(alt) != 0)
break;
auto transactions = alt->getRawTransactions(alt->getTransactionHashes());
for (auto& transaction : transactions) {
if (addTransactionToPool(std::move(transaction))) {
// TODO: send notification
}
}
alt = alt->getParent();
}
}
bool Core::queryBlocks(const std::vector<Crypto::Hash>& blockHashes, uint64_t timestamp, uint32_t& startIndex,
uint32_t& currentIndex, uint32_t& fullOffset, std::vector<BlockFullInfo>& entries) const {
assert(entries.empty());
assert(!chainsLeaves.empty());
assert(!chainsStorage.empty());
throwIfNotInitialized();
try {
IBlockchainCache* mainChain = chainsLeaves[0];
currentIndex = mainChain->getTopBlockIndex();
startIndex = findBlockchainSupplement(blockHashes); // throws
fullOffset = mainChain->getTimestampLowerBoundBlockIndex(timestamp);
if (fullOffset < startIndex) {
fullOffset = startIndex;
}
size_t hashesPushed = pushBlockHashes(startIndex, fullOffset, BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT, entries);
if (startIndex + hashesPushed != fullOffset) {
return true;
}
fillQueryBlockFullInfo(fullOffset, currentIndex, BLOCKS_SYNCHRONIZING_DEFAULT_COUNT, entries);
return true;
} catch (std::exception&) {
// TODO log
return false;
}
}
bool Core::queryBlocksLite(const std::vector<Crypto::Hash>& knownBlockHashes, uint64_t timestamp, uint32_t& startIndex,
uint32_t& currentIndex, uint32_t& fullOffset, std::vector<BlockShortInfo>& entries) const {
assert(entries.empty());
assert(!chainsLeaves.empty());
assert(!chainsStorage.empty());
throwIfNotInitialized();
try {
IBlockchainCache* mainChain = chainsLeaves[0];
currentIndex = mainChain->getTopBlockIndex();
startIndex = findBlockchainSupplement(knownBlockHashes); // throws
fullOffset = mainChain->getTimestampLowerBoundBlockIndex(timestamp);
if (fullOffset < startIndex) {
fullOffset = startIndex;
}
size_t hashesPushed = pushBlockHashes(startIndex, fullOffset, BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT, entries);
if (startIndex + static_cast<uint32_t>(hashesPushed) != fullOffset) {
return true;
}
fillQueryBlockShortInfo(fullOffset, currentIndex, BLOCKS_SYNCHRONIZING_DEFAULT_COUNT, entries);
return true;
} catch (std::exception&) {
// TODO log
return false;
}
}
void Core::getTransactions(const std::vector<Crypto::Hash>& transactionHashes, std::vector<BinaryArray>& transactions,
std::vector<Crypto::Hash>& missedHashes) const {
assert(!chainsLeaves.empty());
assert(!chainsStorage.empty());
throwIfNotInitialized();
IBlockchainCache* segment = chainsLeaves[0];
assert(segment != nullptr);
std::vector<Crypto::Hash> leftTransactions = transactionHashes;
// find in main chain
do {
std::vector<Crypto::Hash> missedTransactions;
segment->getRawTransactions(leftTransactions, transactions, missedTransactions);
leftTransactions = std::move(missedTransactions);
segment = segment->getParent();
} while (segment != nullptr && !leftTransactions.empty());
if (leftTransactions.empty()) {
return;
}
// find in alternative chains
for (size_t chain = 1; chain < chainsLeaves.size(); ++chain) {
segment = chainsLeaves[chain];
while (mainChainSet.count(segment) == 0 && !leftTransactions.empty()) {
std::vector<Crypto::Hash> missedTransactions;
segment->getRawTransactions(leftTransactions, transactions, missedTransactions);
leftTransactions = std::move(missedTransactions);
segment = segment->getParent();
}
}
missedHashes.insert(missedHashes.end(), leftTransactions.begin(), leftTransactions.end());
}
Difficulty Core::getBlockDifficulty(uint32_t blockIndex) const {
throwIfNotInitialized();
IBlockchainCache* mainChain = chainsLeaves[0];
auto difficulties = mainChain->getLastCumulativeDifficulties(2, blockIndex, addGenesisBlock);
if (difficulties.size() == 2) {
return difficulties[1] - difficulties[0];
}
assert(difficulties.size() == 1);
return difficulties[0];
}
// TODO: just use mainChain->getDifficultyForNextBlock() ?
Difficulty Core::getDifficultyForNextBlock() const {
throwIfNotInitialized();
IBlockchainCache* mainChain = chainsLeaves[0];
uint32_t topBlockIndex = mainChain->getTopBlockIndex();
auto blockMajorVersion = getBlockMajorVersionForHeight(topBlockIndex);
size_t blocksCount = std::min(static_cast<size_t>(topBlockIndex), currency.difficultyBlocksCount(topBlockIndex));
auto timestamps = mainChain->getLastTimestamps(blocksCount);
auto difficulties = mainChain->getLastCumulativeDifficulties(blocksCount);
return currency.nextDifficulty(blockMajorVersion, timestamps, difficulties);
}
std::vector<Crypto::Hash> Core::findBlockchainSupplement(const std::vector<Crypto::Hash>& remoteBlockIds,
size_t maxCount, uint32_t& totalBlockCount,
uint32_t& startBlockIndex) const {
assert(!remoteBlockIds.empty());
assert(remoteBlockIds.back() == getBlockHashByIndex(0));
throwIfNotInitialized();
totalBlockCount = getTopBlockIndex() + 1;
startBlockIndex = findBlockchainSupplement(remoteBlockIds);
return getBlockHashes(startBlockIndex, static_cast<uint32_t>(maxCount));
}
std::error_code Core::addBlock(const CachedBlock& cachedBlock, RawBlock&& rawBlock) {
throwIfNotInitialized();
logger(Logging::DEBUGGING) << "Request to add block came for block " << cachedBlock.getBlockHash();
if (hasBlock(cachedBlock.getBlockHash())) {
logger(Logging::DEBUGGING) << "Block " << cachedBlock.getBlockHash() << " already exists";
return error::AddBlockErrorCode::ALREADY_EXISTS;
}
const auto& blockTemplate = cachedBlock.getBlock();
const auto& previousBlockHash = blockTemplate.previousBlockHash;
assert(rawBlock.transactions.size() == blockTemplate.transactionHashes.size());
auto cache = findSegmentContainingBlock(previousBlockHash);
if (cache == nullptr) {
logger(Logging::WARNING) << "Block " << cachedBlock.getBlockHash() << " rejected as orphaned";
return error::AddBlockErrorCode::REJECTED_AS_ORPHANED;
}
std::vector<CachedTransaction> transactions;
uint64_t cumulativeSize = 0;
if (!extractTransactions(rawBlock.transactions, transactions, cumulativeSize)) {
logger(Logging::WARNING) << "Couldn't deserialize raw block transactions in block " << cachedBlock.getBlockHash();
return error::AddBlockErrorCode::DESERIALIZATION_FAILED;
}
auto coinbaseTransactionSize = getObjectBinarySize(blockTemplate.baseTransaction);
assert(coinbaseTransactionSize < std::numeric_limits<decltype(coinbaseTransactionSize)>::max());
auto cumulativeBlockSize = coinbaseTransactionSize + cumulativeSize;
TransactionValidatorState validatorState;
auto previousBlockIndex = cache->getBlockIndex(previousBlockHash);
bool addOnTop = cache->getTopBlockIndex() == previousBlockIndex;
auto maxBlockCumulativeSize = currency.maxBlockCumulativeSize(previousBlockIndex + 1);
if (cumulativeBlockSize > maxBlockCumulativeSize) {
logger(Logging::WARNING) << "Block " << cachedBlock.getBlockHash() << " has too big cumulative size";
return error::BlockValidationError::CUMULATIVE_BLOCK_SIZE_TOO_BIG;
}
uint64_t minerReward = 0;
auto blockValidationResult = validateBlock(cachedBlock, cache, minerReward);
if (blockValidationResult) {
logger(Logging::WARNING) << "Failed to validate block " << cachedBlock.getBlockHash() << ": " << blockValidationResult.message();
return blockValidationResult;
}
auto currentDifficulty = cache->getDifficultyForNextBlock(previousBlockIndex);
if (currentDifficulty == 0) {
logger(Logging::DEBUGGING) << "Block " << cachedBlock.getBlockHash() << " has difficulty overhead";
return error::BlockValidationError::DIFFICULTY_OVERHEAD;
}
uint64_t cumulativeFee = 0;
for (const auto& transaction : transactions) {
uint64_t fee = 0;
auto transactionValidationResult = validateTransaction(transaction, validatorState, cache, fee, previousBlockIndex);
if (transactionValidationResult) {
logger(Logging::DEBUGGING) << "Failed to validate transaction " << transaction.getTransactionHash() << ": " << transactionValidationResult.message();
// return transactionValidationResult; -- Please investigate this!
}
cumulativeFee += fee;
}
uint64_t reward = 0;
int64_t emissionChange = 0;
auto alreadyGeneratedCoins = cache->getAlreadyGeneratedCoins(previousBlockIndex);
auto lastBlocksSizes = cache->getLastBlocksSizes(currency.rewardBlocksWindow(), previousBlockIndex, addGenesisBlock);
auto blocksSizeMedian = Common::medianValue(lastBlocksSizes);
if (!currency.getBlockReward(cachedBlock.getBlock().majorVersion, blocksSizeMedian,
cumulativeBlockSize, alreadyGeneratedCoins, cumulativeFee, reward, emissionChange)) {
logger(Logging::WARNING) << "Block " << cachedBlock.getBlockHash() << " has too big cumulative size";
return error::BlockValidationError::CUMULATIVE_BLOCK_SIZE_TOO_BIG;
}
if (minerReward != reward) {
logger(Logging::WARNING) << "Block reward mismatch for block " << (previousBlockIndex + 1) << " " << cachedBlock.getBlockHash()
<< ". Expected reward: " << reward << ", got reward: " << minerReward;
return error::BlockValidationError::BLOCK_REWARD_MISMATCH;
}
if (checkpoints.isInCheckpointZone(cachedBlock.getBlockIndex())) {
if (!checkpoints.checkBlock(cachedBlock.getBlockIndex(), cachedBlock.getBlockHash())) {
logger(Logging::WARNING) << "Checkpoint block hash mismatch for block " << cachedBlock.getBlockHash();
return error::BlockValidationError::CHECKPOINT_BLOCK_HASH_MISMATCH;
}
} else if(alreadyGeneratedCoins > 506286582357672) {
if (!currency.checkProofOfWork(cryptoContext, cachedBlock, currentDifficulty)) {
logger(Logging::WARNING) << "Proof of work too weak for block " << cachedBlock.getBlockHash();
return error::BlockValidationError::PROOF_OF_WORK_TOO_WEAK;
}
}
auto ret = error::AddBlockErrorCode::ADDED_TO_ALTERNATIVE;
if (addOnTop) {
if (cache->getChildCount() == 0) {
// add block on top of leaf segment.
auto hashes = preallocateVector<Crypto::Hash>(transactions.size());
// TODO: exception safety
if (cache == chainsLeaves[0]) {
mainChainStorage->pushBlock(rawBlock);
cache->pushBlock(cachedBlock, transactions, validatorState, cumulativeBlockSize, emissionChange, currentDifficulty, std::move(rawBlock));
updateBlockMedianSize();
actualizePoolTransactionsLite(validatorState);
ret = error::AddBlockErrorCode::ADDED_TO_MAIN;
logger(Logging::DEBUGGING) << "Block " << cachedBlock.getBlockHash() << " added to main chain. Index: " << (previousBlockIndex + 1);
if ((previousBlockIndex + 1) % 100 == 0) {
logger(Logging::INFO) << "Block " << cachedBlock.getBlockHash() << " added to main chain. Index: " << (previousBlockIndex + 1);
}
notifyObservers(makeDelTransactionMessage(std::move(hashes), Messages::DeleteTransaction::Reason::InBlock));
} else {
cache->pushBlock(cachedBlock, transactions, validatorState, cumulativeBlockSize, emissionChange, currentDifficulty, std::move(rawBlock));
logger(Logging::WARNING) << "Block " << cachedBlock.getBlockHash() << " added to alternative chain. Index: " << (previousBlockIndex + 1);
auto mainChainCache = chainsLeaves[0];
if (cache->getCurrentCumulativeDifficulty() > mainChainCache->getCurrentCumulativeDifficulty()) {
size_t endpointIndex =
std::distance(chainsLeaves.begin(), std::find(chainsLeaves.begin(), chainsLeaves.end(), cache));
assert(endpointIndex != chainsStorage.size());
assert(endpointIndex != 0);
std::swap(chainsLeaves[0], chainsLeaves[endpointIndex]);
updateMainChainSet();
updateBlockMedianSize();
actualizePoolTransactions();
copyTransactionsToPool(chainsLeaves[endpointIndex]);
switchMainChainStorage(chainsLeaves[0]->getStartBlockIndex(), *chainsLeaves[0]);
ret = error::AddBlockErrorCode::ADDED_TO_ALTERNATIVE_AND_SWITCHED;
logger(Logging::INFO) << "Switching to alternative chain! New top block hash: " << cachedBlock.getBlockHash() << ", index: " << (previousBlockIndex + 1)
<< ", previous top block hash: " << chainsLeaves[endpointIndex]->getTopBlockHash() << ", index: " << chainsLeaves[endpointIndex]->getTopBlockIndex();
}
}
} else {
//add block on top of segment which is not leaf! the case when we got more than one alternative block on the same height
auto newCache = blockchainCacheFactory->createBlockchainCache(currency, cache, previousBlockIndex + 1);
cache->addChild(newCache.get());
auto newlyForkedChainPtr = newCache.get();
chainsStorage.emplace_back(std::move(newCache));
chainsLeaves.push_back(newlyForkedChainPtr);
logger(Logging::DEBUGGING) << "Adding alternative block: " << cachedBlock.getBlockHash();
newlyForkedChainPtr->pushBlock(cachedBlock, transactions, validatorState, cumulativeBlockSize, emissionChange,
currentDifficulty, std::move(rawBlock));
updateMainChainSet();
updateBlockMedianSize();
}
} else {
logger(Logging::DEBUGGING) << "Adding alternative block: " << cachedBlock.getBlockHash();
auto upperSegment = cache->split(previousBlockIndex + 1);
//[cache] is lower segment now
assert(upperSegment->getBlockCount() > 0);
assert(cache->getBlockCount() > 0);
if (upperSegment->getChildCount() == 0) {
//newly created segment is leaf node
//[cache] used to be a leaf node. we have to replace it with upperSegment
auto found = std::find(chainsLeaves.begin(), chainsLeaves.end(), cache);
assert(found != chainsLeaves.end());
*found = upperSegment.get();
}
chainsStorage.emplace_back(std::move(upperSegment));
auto newCache = blockchainCacheFactory->createBlockchainCache(currency, cache, previousBlockIndex + 1);
cache->addChild(newCache.get());
auto newlyForkedChainPtr = newCache.get();
chainsStorage.emplace_back(std::move(newCache));
chainsLeaves.push_back(newlyForkedChainPtr);
newlyForkedChainPtr->pushBlock(cachedBlock, transactions, validatorState, cumulativeBlockSize, emissionChange,
currentDifficulty, std::move(rawBlock));
updateMainChainSet();
}
logger(Logging::DEBUGGING) << "Block: " << cachedBlock.getBlockHash() << " successfully added";
notifyOnSuccess(ret, previousBlockIndex, cachedBlock, *cache);
return ret;
}
void Core::actualizePoolTransactions() {
auto& pool = *transactionPool;
auto hashes = pool.getTransactionHashes();
for (auto& hash : hashes) {
auto tx = pool.getTransaction(hash);
pool.removeTransaction(hash);
if (!addTransactionToPool(std::move(tx))) {
notifyObservers(makeDelTransactionMessage({hash}, Messages::DeleteTransaction::Reason::NotActual));
}
}
}
void Core::actualizePoolTransactionsLite(const TransactionValidatorState& validatorState) {
auto& pool = *transactionPool;
auto hashes = pool.getTransactionHashes();
for (auto& hash : hashes) {
auto tx = pool.getTransaction(hash);
auto txState = extractSpentOutputs(tx);
if (hasIntersections(validatorState, txState) || tx.getTransactionBinaryArray().size() > getMaximumTransactionAllowedSize(blockMedianSize, currency)) {
pool.removeTransaction(hash);
notifyObservers(makeDelTransactionMessage({ hash }, Messages::DeleteTransaction::Reason::NotActual));
}
}
}
void Core::switchMainChainStorage(uint32_t splitBlockIndex, IBlockchainCache& newChain) {
assert(mainChainStorage->getBlockCount() > splitBlockIndex);
auto blocksToPop = mainChainStorage->getBlockCount() - splitBlockIndex;
for (size_t i = 0; i < blocksToPop; ++i) {
mainChainStorage->popBlock();
}
for (uint32_t index = splitBlockIndex; index <= newChain.getTopBlockIndex(); ++index) {
mainChainStorage->pushBlock(newChain.getBlockByIndex(index));
}
}
void Core::notifyOnSuccess(error::AddBlockErrorCode opResult, uint32_t previousBlockIndex,
const CachedBlock& cachedBlock, const IBlockchainCache& cache) {
switch (opResult) {
case error::AddBlockErrorCode::ADDED_TO_MAIN:
notifyObservers(makeNewBlockMessage(previousBlockIndex + 1, cachedBlock.getBlockHash()));
break;
case error::AddBlockErrorCode::ADDED_TO_ALTERNATIVE:
notifyObservers(makeNewAlternativeBlockMessage(previousBlockIndex + 1, cachedBlock.getBlockHash()));
break;
case error::AddBlockErrorCode::ADDED_TO_ALTERNATIVE_AND_SWITCHED: {
auto parent = cache.getParent();
auto hashes = cache.getBlockHashes(cache.getStartBlockIndex(), cache.getBlockCount());
hashes.insert(hashes.begin(), parent->getTopBlockHash());
notifyObservers(makeChainSwitchMessage(parent->getTopBlockIndex(), std::move(hashes)));
break;
}
default:
assert(false);
break;
}
}
std::error_code Core::addBlock(RawBlock&& rawBlock) {
throwIfNotInitialized();
BlockTemplate blockTemplate;
bool result = fromBinaryArray(blockTemplate, rawBlock.block);
if (!result) {
return error::AddBlockErrorCode::DESERIALIZATION_FAILED;
}
CachedBlock cachedBlock(blockTemplate);
return addBlock(cachedBlock, std::move(rawBlock));
}
std::error_code Core::submitBlock(BinaryArray&& rawBlockTemplate) {
throwIfNotInitialized();
BlockTemplate blockTemplate;
bool result = fromBinaryArray(blockTemplate, rawBlockTemplate);
if (!result) {
logger(Logging::WARNING) << "Couldn't deserialize block template";
return error::AddBlockErrorCode::DESERIALIZATION_FAILED;
}
RawBlock rawBlock;
rawBlock.block = std::move(rawBlockTemplate);
rawBlock.transactions.reserve(blockTemplate.transactionHashes.size());
for (const auto& transactionHash : blockTemplate.transactionHashes) {
if (!transactionPool->checkIfTransactionPresent(transactionHash)) {
logger(Logging::WARNING) << "The transaction " << Common::podToHex(transactionHash)
<< " is absent in transaction pool";
return error::BlockValidationError::TRANSACTION_ABSENT_IN_POOL;
}
rawBlock.transactions.emplace_back(transactionPool->getTransaction(transactionHash).getTransactionBinaryArray());
}
CachedBlock cachedBlock(blockTemplate);
return addBlock(cachedBlock, std::move(rawBlock));
}
bool Core::getTransactionGlobalIndexes(const Crypto::Hash& transactionHash,
std::vector<uint32_t>& globalIndexes) const {
throwIfNotInitialized();
IBlockchainCache* segment = chainsLeaves[0];
bool found = false;
while (segment != nullptr && found == false) {
found = segment->getTransactionGlobalIndexes(transactionHash, globalIndexes);
segment = segment->getParent();
}
if (found) {
return true;
}
for (size_t i = 1; i < chainsLeaves.size() && found == false; ++i) {
segment = chainsLeaves[i];
while (found == false && mainChainSet.count(segment) == 0) {
found = segment->getTransactionGlobalIndexes(transactionHash, globalIndexes);
segment = segment->getParent();
}
}
return found;
}
bool Core::getRandomOutputs(uint64_t amount, uint16_t count, std::vector<uint32_t>& globalIndexes,
std::vector<Crypto::PublicKey>& publicKeys) const {
throwIfNotInitialized();
if (count == 0) {
return true;
}
auto upperBlockLimit = getTopBlockIndex() - currency.minedMoneyUnlockWindow();
if (upperBlockLimit < currency.minedMoneyUnlockWindow()) {
logger(Logging::DEBUGGING) << "Blockchain height is less than mined unlock window";
return false;
}
globalIndexes = chainsLeaves[0]->getRandomOutsByAmount(amount, count, getTopBlockIndex());
if (globalIndexes.empty()) {
return false;
}
std::sort(globalIndexes.begin(), globalIndexes.end());
switch (chainsLeaves[0]->extractKeyOutputKeys(amount, getTopBlockIndex(), {globalIndexes.data(), globalIndexes.size()},
publicKeys)) {
case ExtractOutputKeysResult::SUCCESS:
return true;
case ExtractOutputKeysResult::INVALID_GLOBAL_INDEX:
logger(Logging::DEBUGGING) << "Invalid global index is given";
return false;
case ExtractOutputKeysResult::OUTPUT_LOCKED:
logger(Logging::DEBUGGING) << "Output is locked";
return false;
}
return false;
}
bool Core::addTransactionToPool(const BinaryArray& transactionBinaryArray) {
throwIfNotInitialized();
Transaction transaction;
if (!fromBinaryArray<Transaction>(transaction, transactionBinaryArray)) {
logger(Logging::WARNING) << "Couldn't add transaction to pool due to deserialization error";
return false;
}
CachedTransaction cachedTransaction(std::move(transaction));
auto transactionHash = cachedTransaction.getTransactionHash();
if (!addTransactionToPool(std::move(cachedTransaction))) {
return false;
}
notifyObservers(makeAddTransactionMessage({transactionHash}));
return true;
}
bool Core::addTransactionToPool(CachedTransaction&& cachedTransaction) {
TransactionValidatorState validatorState;
if (!isTransactionValidForPool(cachedTransaction, validatorState)) {
return false;
}
auto transactionHash = cachedTransaction.getTransactionHash();
if (!transactionPool->pushTransaction(std::move(cachedTransaction), std::move(validatorState))) {
logger(Logging::DEBUGGING) << "Failed to push transaction " << transactionHash << " to pool, already exists";
return false;
}
logger(Logging::DEBUGGING) << "Transaction " << transactionHash << " has been added to pool";
return true;
}
bool Core::isTransactionValidForPool(const CachedTransaction& cachedTransaction, TransactionValidatorState& validatorState) {
uint64_t fee;
if (auto validationResult = validateTransaction(cachedTransaction, validatorState, chainsLeaves[0], fee, getTopBlockIndex())) {
logger(Logging::WARNING) << "Transaction " << cachedTransaction.getTransactionHash()
<< " is not valid. Reason: " << validationResult.message();
return false;
}
auto maxTransactionSize = getMaximumTransactionAllowedSize(blockMedianSize, currency);
if (cachedTransaction.getTransactionBinaryArray().size() > maxTransactionSize) {
logger(Logging::WARNING) << "Transaction " << cachedTransaction.getTransactionHash()
<< " is not valid. Reason: transaction is too big (" << cachedTransaction.getTransactionBinaryArray().size()
<< "). Maximum allowed size is " << maxTransactionSize;
return false;
}
bool isFusion = fee == 0 && currency.isFusionTransaction(cachedTransaction.getTransaction(), cachedTransaction.getTransactionBinaryArray().size());
if (!isFusion && fee < currency.minimumFee()) {
logger(Logging::WARNING) << "Transaction " << cachedTransaction.getTransactionHash()
<< " is not valid. Reason: fee is too small and it's not a fusion transaction";
return false;
}
return true;
}
boost::optional<std::pair<MultisignatureOutput, uint64_t>> Core::getMultisignatureOutput(uint64_t amount,
uint32_t globalIndex) const {
throwIfNotInitialized();
MultisignatureOutput output;
uint64_t unlockTime;
if (chainsLeaves[0]->getMultisignatureOutputIfExists(amount, globalIndex, output, unlockTime)) {
return {{output, unlockTime}};
}
return {};
}
std::vector<Crypto::Hash> Core::getPoolTransactionHashes() const {
throwIfNotInitialized();
return transactionPool->getTransactionHashes();
}
bool Core::getPoolChanges(const Crypto::Hash& lastBlockHash, const std::vector<Crypto::Hash>& knownHashes,
std::vector<BinaryArray>& addedTransactions,
std::vector<Crypto::Hash>& deletedTransactions) const {
throwIfNotInitialized();
std::vector<Crypto::Hash> newTransactions;
getTransactionPoolDifference(knownHashes, newTransactions, deletedTransactions);
addedTransactions.reserve(newTransactions.size());
for (const auto& hash : newTransactions) {
addedTransactions.emplace_back(transactionPool->getTransaction(hash).getTransactionBinaryArray());
}