bool core::check_tx_semantic(const Transaction& tx, bool keeped_by_block) {
if (!tx.vin.size()) {
logger(ERROR) << "tx with empty inputs, rejected for tx id= " << get_transaction_hash(tx);
return false;
}
if (!check_inputs_types_supported(tx)) {
logger(ERROR) << "unsupported input types for tx id= " << get_transaction_hash(tx);
return false;
}
std::string errmsg;
if (!check_outs_valid(tx, &errmsg)) {
logger(ERROR) << "tx with invalid outputs, rejected for tx id= " << get_transaction_hash(tx) << ": " << errmsg;
return false;
}
if (!check_money_overflow(tx)) {
logger(ERROR) << "tx have money overflow, rejected for tx id= " << get_transaction_hash(tx);
return false;
}
uint64_t amount_in = 0;
get_inputs_money_amount(tx, amount_in);
uint64_t amount_out = get_outs_money_amount(tx);
if (amount_in < amount_out) {
logger(ERROR) << "tx with wrong amounts: ins " << amount_in << ", outs " << amount_out << ", rejected for tx id= " << get_transaction_hash(tx);
return false;
}
if (!keeped_by_block && get_object_blobsize(tx) >= m_blockchain_storage.get_current_comulative_blocksize_limit() - m_currency.minerTxBlobReservedSize()) {
logger(ERROR) << "transaction is too big " << get_object_blobsize(tx) << ", maximum allowed size is " <<
(m_blockchain_storage.get_current_comulative_blocksize_limit() - m_currency.minerTxBlobReservedSize());
return false;
}
//check if tx use different key images
if (!check_tx_inputs_keyimages_diff(tx)) {
logger(ERROR) << "tx has a few inputs with identical keyimages";
return false;
}
if (!checkMultisignatureInputsDiff(tx)) {
logger(ERROR) << "tx has a few multisignature inputs with identical output indexes";
return false;
}
return true;
}
bool BlockchainExplorerDataBuilder::fillTransactionDetails(const Transaction& transaction, TransactionDetails& transactionDetails, uint64_t timestamp) {
Crypto::Hash hash = getObjectHash(transaction);
transactionDetails.hash = hash;
transactionDetails.timestamp = timestamp;
Crypto::Hash blockHash;
uint32_t blockHeight;
if (!core.getBlockContainingTx(hash, blockHash, blockHeight)) {
transactionDetails.inBlockchain = false;
transactionDetails.blockHeight = boost::value_initialized<uint32_t>();
transactionDetails.blockHash = boost::value_initialized<Crypto::Hash>();
} else {
transactionDetails.inBlockchain = true;
transactionDetails.blockHeight = blockHeight;
transactionDetails.blockHash = blockHash;
if (timestamp == 0) {
Block block;
if (!core.getBlockByHash(blockHash, block)) {
return false;
}
transactionDetails.timestamp = block.timestamp;
}
}
transactionDetails.size = getObjectBinarySize(transaction);
transactionDetails.unlockTime = transaction.unlockTime;
transactionDetails.totalOutputsAmount = get_outs_money_amount(transaction);
uint64_t inputsAmount;
if (!get_inputs_money_amount(transaction, inputsAmount)) {
return false;
}
transactionDetails.totalInputsAmount = inputsAmount;
if (transaction.inputs.size() > 0 && transaction.inputs.front().type() == typeid(BaseInput)) {
//It's gen transaction
transactionDetails.fee = 0;
transactionDetails.mixin = 0;
} else {
uint64_t fee;
if (!get_tx_fee(transaction, fee)) {
return false;
}
transactionDetails.fee = fee;
uint64_t mixin;
if (!getMixin(transaction, mixin)) {
return false;
}
transactionDetails.mixin = mixin;
}
Crypto::Hash paymentId;
if (getPaymentId(transaction, paymentId)) {
transactionDetails.paymentId = paymentId;
} else {
transactionDetails.paymentId = boost::value_initialized<Crypto::Hash>();
}
fillTxExtra(transaction.extra, transactionDetails.extra);
transactionDetails.signatures.reserve(transaction.signatures.size());
for (const std::vector<Crypto::Signature>& signatures : transaction.signatures) {
std::vector<Crypto::Signature> signaturesDetails;
signaturesDetails.reserve(signatures.size());
for (const Crypto::Signature& signature : signatures) {
signaturesDetails.push_back(std::move(signature));
}
transactionDetails.signatures.push_back(std::move(signaturesDetails));
}
transactionDetails.inputs.reserve(transaction.inputs.size());
for (const TransactionInput& txIn : transaction.inputs) {
TransactionInputDetails txInDetails;
if (txIn.type() == typeid(BaseInput)) {
TransactionInputGenerateDetails txInGenDetails;
txInGenDetails.height = boost::get<BaseInput>(txIn).blockIndex;
txInDetails.amount = 0;
for (const TransactionOutput& out : transaction.outputs) {
txInDetails.amount += out.amount;
}
txInDetails.input = txInGenDetails;
} else if (txIn.type() == typeid(KeyInput)) {
TransactionInputToKeyDetails txInToKeyDetails;
const KeyInput& txInToKey = boost::get<KeyInput>(txIn);
std::list<std::pair<Crypto::Hash, size_t>> outputReferences;
if (!core.scanOutputkeysForIndices(txInToKey, outputReferences)) {
return false;
}
txInDetails.amount = txInToKey.amount;
txInToKeyDetails.outputIndexes = txInToKey.outputIndexes;
txInToKeyDetails.keyImage = txInToKey.keyImage;
txInToKeyDetails.mixin = txInToKey.outputIndexes.size();
txInToKeyDetails.output.number = outputReferences.back().second;
txInToKeyDetails.output.transactionHash = outputReferences.back().first;
txInDetails.input = txInToKeyDetails;
} else if (txIn.type() == typeid(MultisignatureInput)) {
TransactionInputMultisignatureDetails txInMultisigDetails;
const MultisignatureInput& txInMultisig = boost::get<MultisignatureInput>(txIn);
txInDetails.amount = txInMultisig.amount;
txInMultisigDetails.signatures = txInMultisig.signatureCount;
std::pair<Crypto::Hash, size_t> outputReference;
if (!core.getMultisigOutputReference(txInMultisig, outputReference)) {
return false;
}
txInMultisigDetails.output.number = outputReference.second;
txInMultisigDetails.output.transactionHash = outputReference.first;
txInDetails.input = txInMultisigDetails;
} else {
return false;
}
transactionDetails.inputs.push_back(std::move(txInDetails));
}
transactionDetails.outputs.reserve(transaction.outputs.size());
std::vector<uint32_t> globalIndices;
globalIndices.reserve(transaction.outputs.size());
if (!transactionDetails.inBlockchain || !core.get_tx_outputs_gindexs(hash, globalIndices)) {
for (size_t i = 0; i < transaction.outputs.size(); ++i) {
globalIndices.push_back(0);
}
}
typedef boost::tuple<TransactionOutput, uint32_t> outputWithIndex;
auto range = boost::combine(transaction.outputs, globalIndices);
for (const outputWithIndex& txOutput : range) {
TransactionOutputDetails txOutDetails;
txOutDetails.amount = txOutput.get<0>().amount;
txOutDetails.globalIndex = txOutput.get<1>();
if (txOutput.get<0>().target.type() == typeid(KeyOutput)) {
TransactionOutputToKeyDetails txOutToKeyDetails;
txOutToKeyDetails.txOutKey = boost::get<KeyOutput>(txOutput.get<0>().target).key;
txOutDetails.output = txOutToKeyDetails;
} else if (txOutput.get<0>().target.type() == typeid(MultisignatureOutput)) {
TransactionOutputMultisignatureDetails txOutMultisigDetails;
MultisignatureOutput txOutMultisig = boost::get<MultisignatureOutput>(txOutput.get<0>().target);
txOutMultisigDetails.keys.reserve(txOutMultisig.keys.size());
for (const Crypto::PublicKey& key : txOutMultisig.keys) {
txOutMultisigDetails.keys.push_back(std::move(key));
}
txOutMultisigDetails.requiredSignatures = txOutMultisig.requiredSignatureCount;
txOutDetails.output = txOutMultisigDetails;
} else {
return false;
}
transactionDetails.outputs.push_back(std::move(txOutDetails));
}
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::add_tx(const transaction &tx, const crypto::hash &id, tx_verification_context& tvc, bool kept_by_block, std::string alias)
{
size_t blob_size = get_object_blobsize(tx);
//#9Protection from big transaction flood
if (!kept_by_block && blob_size > currency::get_max_transaction_blob_size(m_blockchain.get_current_blockchain_height()))
{
LOG_PRINT_L0("transaction is too big (" << blob_size << ")bytes for current transaction flow, tx_id: " << id);
tvc.m_verifivation_failed = true;
return false;
}
if (!check_inputs_types_supported(tx))
{
tvc.m_verifivation_failed = true;
return false;
}
uint64_t inputs_amount = 0;
if (!get_inputs_money_amount(tx, inputs_amount))
{
tvc.m_verifivation_failed = true;
return false;
}
uint64_t outputs_amount = get_outs_money_amount(tx);
if (outputs_amount >= inputs_amount)
{
LOG_PRINT_L0("transaction use more money then it has: use " << outputs_amount << ", have " << inputs_amount);
tvc.m_verifivation_failed = true;
return false;
}
//check key images for transaction if it is not kept by blockhave_tx_keyimges_as_spent
if (!kept_by_block)
{
if (have_tx_keyimges_as_spent(tx))
{
LOG_ERROR("Transaction with id= " << id << " used already spent key images");
tvc.m_verifivation_failed = true;
return false;
}
//transaction spam protection, soft rule
if (inputs_amount - outputs_amount < TX_POOL_MINIMUM_FEE)
{
LOG_ERROR("Transaction with id= " << id << " has too small fee: " << inputs_amount - outputs_amount << ", expected fee: " << DEFAULT_FEE);
tvc.m_verifivation_failed = true;
return false;
}
}
crypto::hash max_used_block_id = null_hash;
uint64_t max_used_block_height = 0;
bool ch_inp_res = m_blockchain.check_tx_inputs(tx, max_used_block_height, max_used_block_id);
CRITICAL_REGION_LOCAL(m_transactions_lock);
if (!ch_inp_res)
{
if (kept_by_block)
{
//if there is a same alias on the block, then delete the tx with the same alias in the pool
crypto::hash hash;
if (alias.size() && (hash = find_alias(alias)) != null_hash)
{
transaction tx = AUTO_VAL_INIT(tx);
size_t size = 0;
uint64_t fee = 0;
take_tx(hash, tx, size, fee);
LOG_PRINT_L2("Found alias " << alias << " in block, delete pool tx with the same alias: " << id);
}
//anyway add this transaction to pool, because it related to block
auto txd_p = m_transactions.insert(transactions_container::value_type(id, tx_details()));
if (!txd_p.second)
{
return false;
}
//CHECK_AND_ASSERT_MES(txd_p.second, false, "transaction already exists at inserting in memory pool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.tx = tx;
txd_p.first->second.fee = inputs_amount - outputs_amount;
txd_p.first->second.max_used_block_id = null_hash;
txd_p.first->second.max_used_block_height = 0;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.receive_time = time(nullptr);
tvc.m_verifivation_impossible = true;
tvc.m_added_to_pool = true;
}
else
{
LOG_PRINT_L0("tx used wrong inputs, rejected");
tvc.m_verifivation_failed = true;
return false;
}
}
else
{
//check alias repeat or not
if (!add_alias_tx_pair(alias, id))
{
tvc.m_verifivation_failed = true;
tvc.m_added_to_pool = false;
return false;
}
//update transactions container
auto txd_p = m_transactions.insert(transactions_container::value_type(id, tx_details()));
if (!txd_p.second)
{
return false;
}
//CHECK_AND_ASSERT_MES(txd_p.second, false, "intrnal error: transaction already exists at inserting in memorypool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.tx = tx;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.fee = inputs_amount - outputs_amount;
txd_p.first->second.max_used_block_id = max_used_block_id;
txd_p.first->second.max_used_block_height = max_used_block_height;
txd_p.first->second.last_failed_height = 0;
txd_p.first->second.last_failed_id = null_hash;
txd_p.first->second.receive_time = time(nullptr);
tvc.m_added_to_pool = true;
if (txd_p.first->second.fee > 0)
tvc.m_should_be_relayed = true;
}
tvc.m_verifivation_failed = true;
//update image_keys container, here should everything goes ok.
BOOST_FOREACH(const auto& in, tx.vin)
{
CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, txin, false);
std::unordered_set<crypto::hash>& kei_image_set = m_spent_key_images[txin.k_image];
CHECK_AND_ASSERT_MES(kept_by_block || kei_image_set.size() == 0, false, "internal error: keeped_by_block=" << kept_by_block
<< ", kei_image_set.size()=" << kei_image_set.size() << ENDL << "txin.k_image=" << txin.k_image << ENDL
<< "tx_id=" << id);
auto ins_res = kei_image_set.insert(id);
CHECK_AND_ASSERT_MES(ins_res.second, false, "internal error: try to insert duplicate iterator in key_image set");
}
tvc.m_verifivation_failed = false;
//succeed
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::add_tx(const transaction &tx, /*const crypto::hash& tx_prefix_hash,*/ const crypto::hash &id, size_t blob_size, tx_verification_context& tvc, bool kept_by_block)
{
//#9Protection from big transaction flood
if(!kept_by_block && blob_size > m_blockchain.get_current_comulative_blocksize_limit() / 2)
{
LOG_PRINT_L0("transaction is too big for current transaction flow, tx_id: " << id);
tvc.m_verifivation_failed = true;
return false;
}
//TODO: add rule for relay, based on tx size/fee ratio
if(!check_inputs_types_supported(tx))
{
tvc.m_verifivation_failed = true;
return false;
}
uint64_t inputs_amount = 0;
if(!get_inputs_money_amount(tx, inputs_amount))
{
tvc.m_verifivation_failed = true;
return false;
}
uint64_t outputs_amount = get_outs_money_amount(tx);
if(outputs_amount >= inputs_amount)
{
LOG_PRINT_L0("transaction use more money then it has: use " << outputs_amount << ", have " << inputs_amount);
tvc.m_verifivation_failed = true;
return false;
}
//check key images for transaction if it is not kept by block
if(!kept_by_block)
{
if(have_tx_keyimges_as_spent(tx))
{
LOG_ERROR("Transaction with id= "<< id << " used already spent key images");
tvc.m_verifivation_failed = true;
return false;
}
}
crypto::hash max_used_block_id = null_hash;
uint64_t max_used_block_height = 0;
bool ch_inp_res = m_blockchain.check_tx_inputs(tx, max_used_block_height, max_used_block_id);
CRITICAL_REGION_LOCAL(m_transactions_lock);
if(!ch_inp_res)
{
if(kept_by_block)
{
//anyway add this transaction to pool, because it related to block
auto txd_p = m_transactions.insert(transactions_container::value_type(id, tx_details()));
CHECK_AND_ASSERT_MES(txd_p.second, false, "transaction already exists at inserting in memory pool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.tx = tx;
txd_p.first->second.fee = inputs_amount - outputs_amount;
txd_p.first->second.max_used_block_id = null_hash;
txd_p.first->second.max_used_block_height = 0;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.receive_time = time(nullptr);
tvc.m_verifivation_impossible = true;
tvc.m_added_to_pool = true;
} else
{
LOG_PRINT_L0("tx used wrong inputs, rejected");
tvc.m_verifivation_failed = true;
return false;
}
} else
{
//update transactions container
auto txd_p = m_transactions.insert(transactions_container::value_type(id, tx_details()));
CHECK_AND_ASSERT_MES(txd_p.second, false, "intrnal error: transaction already exists at inserting in memorypool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.tx = tx;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.fee = inputs_amount - outputs_amount;
txd_p.first->second.max_used_block_id = max_used_block_id;
txd_p.first->second.max_used_block_height = max_used_block_height;
txd_p.first->second.last_failed_height = 0;
txd_p.first->second.last_failed_id = null_hash;
txd_p.first->second.receive_time = time(nullptr);
tvc.m_added_to_pool = true;
if(txd_p.first->second.fee > 0)
tvc.m_should_be_relayed = true;
}
tvc.m_verifivation_failed = true;
//update image_keys container, here should everything goes ok.
BOOST_FOREACH(const auto& in, tx.vin)
{
CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, txin, false);
std::unordered_set<crypto::hash>& kei_image_set = m_spent_key_images[txin.k_image];
CHECK_AND_ASSERT_MES(kept_by_block || kei_image_set.size() == 0, false, "internal error: keeped_by_block=" << kept_by_block
<< ", kei_image_set.size()=" << kei_image_set.size() << ENDL << "txin.k_image=" << txin.k_image << ENDL
<< "tx_id=" << id );
auto ins_res = kei_image_set.insert(id);
CHECK_AND_ASSERT_MES(ins_res.second, false, "internal error: try to insert duplicate iterator in key_image set");
}
tvc.m_verifivation_failed = false;
//succeed
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::add_tx(const transaction &tx, /*const crypto::hash& tx_prefix_hash,*/ const crypto::hash &id, size_t blob_size, tx_verification_context& tvc, bool kept_by_block)
{
if(!check_inputs_types_supported(tx))
{
tvc.m_verifivation_failed = true;
return false;
}
uint64_t inputs_amount = 0;
if(!get_inputs_money_amount(tx, inputs_amount))
{
tvc.m_verifivation_failed = true;
return false;
}
uint64_t outputs_amount = get_outs_money_amount(tx);
if(outputs_amount >= inputs_amount)
{
LOG_PRINT_L1("transaction use more money then it has: use " << print_money(outputs_amount) << ", have " << print_money(inputs_amount));
tvc.m_verifivation_failed = true;
return false;
}
uint64_t fee = inputs_amount - outputs_amount;
uint64_t needed_fee = blob_size / 1024;
needed_fee += (blob_size % 1024) ? 1 : 0;
needed_fee *= FEE_PER_KB;
if (!kept_by_block && fee < needed_fee /*&& fee < MINING_ALLOWED_LEGACY_FEE*/)
{
LOG_PRINT_L1("transaction fee is not enough: " << print_money(fee) << ", minumim fee: " << print_money(needed_fee));
tvc.m_verifivation_failed = true;
return false;
}
if (!kept_by_block && blob_size >= TRANSACTION_SIZE_LIMIT)
{
LOG_PRINT_L1("transaction is too big: " << blob_size << " bytes, maximum size: " << TRANSACTION_SIZE_LIMIT);
tvc.m_verifivation_failed = true;
return false;
}
//check key images for transaction if it is not kept by block
if(!kept_by_block)
{
if(have_tx_keyimges_as_spent(tx))
{
LOG_PRINT_L1("Transaction with id= "<< id << " used already spent key images");
tvc.m_verifivation_failed = true;
return false;
}
}
crypto::hash max_used_block_id = null_hash;
uint64_t max_used_block_height = 0;
bool ch_inp_res = m_blockchain.check_tx_inputs(tx, max_used_block_height, max_used_block_id);
CRITICAL_REGION_LOCAL(m_transactions_lock);
if(!ch_inp_res)
{
if(kept_by_block)
{
//anyway add this transaction to pool, because it related to block
auto txd_p = m_transactions.insert(transactions_container::value_type(id, tx_details()));
CHECK_AND_ASSERT_MES(txd_p.second, false, "transaction already exists at inserting in memory pool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.tx = tx;
txd_p.first->second.fee = inputs_amount - outputs_amount;
txd_p.first->second.max_used_block_id = null_hash;
txd_p.first->second.max_used_block_height = 0;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.receive_time = time(nullptr);
tvc.m_verifivation_impossible = true;
tvc.m_added_to_pool = true;
}else
{
LOG_PRINT_L1("tx used wrong inputs, rejected");
tvc.m_verifivation_failed = true;
return false;
}
}else
{
//update transactions container
auto txd_p = m_transactions.insert(transactions_container::value_type(id, tx_details()));
CHECK_AND_ASSERT_MES(txd_p.second, false, "intrnal error: transaction already exists at inserting in memorypool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.tx = tx;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.fee = inputs_amount - outputs_amount;
txd_p.first->second.max_used_block_id = max_used_block_id;
txd_p.first->second.max_used_block_height = max_used_block_height;
txd_p.first->second.last_failed_height = 0;
txd_p.first->second.last_failed_id = null_hash;
txd_p.first->second.receive_time = time(nullptr);
tvc.m_added_to_pool = true;
if(txd_p.first->second.fee > 0)
tvc.m_should_be_relayed = true;
}
tvc.m_verifivation_failed = true;
//update image_keys container, here should everything goes ok.
BOOST_FOREACH(const auto& in, tx.vin)
{
CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, txin, false);
std::unordered_set<crypto::hash>& kei_image_set = m_spent_key_images[txin.k_image];
CHECK_AND_ASSERT_MES(kept_by_block || kei_image_set.size() == 0, false, "internal error: keeped_by_block=" << kept_by_block
<< ", kei_image_set.size()=" << kei_image_set.size() << ENDL << "txin.k_image=" << txin.k_image << ENDL
<< "tx_id=" << id );
auto ins_res = kei_image_set.insert(id);
CHECK_AND_ASSERT_MES(ins_res.second, false, "internal error: try to insert duplicate iterator in key_image set");
}
tvc.m_verifivation_failed = false;
m_txs_by_fee.emplace((double)blob_size / fee, id);
//succeed
return true;
}