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Merge pull request #410

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33affd2 blockchain: on hardfork 2, require mixin 2 at least if possible (moneromooo-monero)
434e0f4 hardfork: make the voting window a week (moneromooo-monero)
0a7421b hardfork: rescan speedup (moneromooo-monero)
fec98b8 hardfork: remove use of GNU extension for initializing object (moneromooo-monero)
4bbf944 blockchain: on hardfork 2, allow miners to claim less money than allowed (moneromooo-monero)
088bc56 hardfork: change window semantics to not count the newly added block (moneromooo-monero)
198f557 blockchain: use different hard fork settings for testnet and mainnet (moneromooo-monero)
This commit is contained in:
Riccardo Spagni 2015-09-28 10:09:26 +02:00
commit 1e7fc9c093
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GPG key ID: 55432DF31CCD4FCD
4 changed files with 151 additions and 49 deletions
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74
src/cryptonote_core/blockchain.cpp
View file

@ -73,13 +73,24 @@ static const struct {
uint8_t version;
uint64_t height;
time_t time;
} hard_forks[] = {
} mainnet_hard_forks[] = {
// version 1 from the start of the blockchain
{ 1, 1, 1341378000 },
// version 2 can start from block 1009827, setup on the 20th of september
{ 2, 1009827, 1442763710 },
};
static const uint64_t mainnet_hard_fork_version_1_till = 750000;
static const struct {
uint8_t version;
uint64_t height;
time_t time;
} testnet_hard_forks[] = {
// version 1 from the start of the blockchain
{ 1, 1, 1341378000 },
};
static const uint64_t testnet_hard_fork_version_1_till = 540000;
//------------------------------------------------------------------
Blockchain::Blockchain(tx_memory_pool& tx_pool) :
@ -287,9 +298,17 @@ bool Blockchain::init(BlockchainDB* db, const bool testnet)
m_db = db;
m_hardfork = new HardFork(*db);
for (size_t n = 0; n < sizeof(hard_forks) / sizeof(hard_forks[0]); ++n)
m_hardfork->add(hard_forks[n].version, hard_forks[n].height, hard_forks[n].time);
if (testnet) {
m_hardfork = new HardFork(*db, 1, testnet_hard_fork_version_1_till);
for (size_t n = 0; n < sizeof(testnet_hard_forks) / sizeof(testnet_hard_forks[0]); ++n)
m_hardfork->add(testnet_hard_forks[n].version, testnet_hard_forks[n].height, testnet_hard_forks[n].time);
}
else
{
m_hardfork = new HardFork(*db, 1, mainnet_hard_fork_version_1_till);
for (size_t n = 0; n < sizeof(mainnet_hard_forks) / sizeof(mainnet_hard_forks[0]); ++n)
m_hardfork->add(mainnet_hard_forks[n].version, mainnet_hard_forks[n].height, mainnet_hard_forks[n].time);
}
m_hardfork->init();
// if the blockchain is new, add the genesis block
@ -947,10 +966,14 @@ bool Blockchain::validate_miner_transaction(const block& b, size_t cumulative_bl
LOG_PRINT_L1("coinbase transaction spend too much money (" << print_money(money_in_use) << "). Block reward is " << print_money(base_reward + fee) << "(" << print_money(base_reward) << "+" << print_money(fee) << ")");
return false;
}
if(base_reward + fee != money_in_use)
// From hard fork 2, we allow a miner to claim less block reward than is allowed, in case a miner wants less dust
if (m_hardfork->get_current_version() < 2)
{
LOG_PRINT_L1("coinbase transaction doesn't use full amount of block reward: spent: " << money_in_use << ", block reward " << base_reward + fee << "(" << base_reward << "+" << fee << ")");
return false;
if(base_reward + fee != money_in_use)
{
LOG_PRINT_L1("coinbase transaction doesn't use full amount of block reward: spent: " << money_in_use << ", block reward " << base_reward + fee << "(" << base_reward << "+" << fee << ")");
return false;
}
}
return true;
}
@ -1975,6 +1998,43 @@ bool Blockchain::check_tx_inputs(const transaction& tx, uint64_t* pmax_used_bloc
return true;
}
// from hard fork 2, we require mixin at least 2 unless one output cannot mix with 2 others
// if one output cannot mix with 2 others, we accept at most 1 output that can mix
if (m_hardfork->get_current_version() >= 2)
{
size_t n_unmixable = 0, n_mixable = 0;
size_t mixin = std::numeric_limits<size_t>::max();
for (const auto& txin : tx.vin)
{
// non txin_to_key inputs will be rejected below
if (txin.type() == typeid(txin_to_key))
{
const txin_to_key& in_to_key = boost::get<txin_to_key>(txin);
uint64_t n_outputs = m_db->get_num_outputs(in_to_key.amount);
// n_outputs includes the output we're considering
if (n_outputs <= 2)
++n_unmixable;
else
++n_mixable;
if (in_to_key.key_offsets.size() - 1 < mixin)
mixin = in_to_key.key_offsets.size() - 1;
}
}
if (mixin < 2)
{
if (n_unmixable == 0)
{
LOG_PRINT_L1("Tx " << get_transaction_hash(tx) << " has too low mixin (" << mixin << "), and no unmixable inputs");
return false;
}
if (n_mixable > 1)
{
LOG_PRINT_L1("Tx " << get_transaction_hash(tx) << " has too low mixin (" << mixin << "), and more than one mixable input with unmixable inputs");
return false;
}
}
}
auto it = m_check_txin_table.find(tx_prefix_hash);
if(it == m_check_txin_table.end())
{

70
src/cryptonote_core/hardfork.cpp
View file

@ -35,14 +35,19 @@
using namespace cryptonote;
HardFork::HardFork(cryptonote::BlockchainDB &db, uint8_t original_version, time_t forked_time, time_t update_time, uint64_t window_size, int threshold_percent):
HardFork::HardFork(cryptonote::BlockchainDB &db, uint8_t original_version, uint64_t original_version_till_height, time_t forked_time, time_t update_time, uint64_t window_size, int threshold_percent):
db(db),
original_version(original_version),
original_version_till_height(original_version_till_height),
forked_time(forked_time),
update_time(update_time),
window_size(window_size),
threshold_percent(threshold_percent)
{
if (window_size == 0)
throw "window_size needs to be strictly positive";
if (threshold_percent > 100)
throw "threshold_percent needs to be between 0 and 100";
}
bool HardFork::add(uint8_t version, uint64_t height, time_t time)
@ -60,13 +65,12 @@ bool HardFork::add(uint8_t version, uint64_t height, time_t time)
if (time <= heights.back().time)
return false;
}
heights.push_back({version: version, height: height, time: time});
heights.push_back(Params(version, height, time));
return true;
}
uint8_t HardFork::get_effective_version(const cryptonote::block &block) const
uint8_t HardFork::get_effective_version(uint8_t version) const
{
uint8_t version = block.major_version;
if (!heights.empty()) {
uint8_t max_version = heights.back().version;
if (version > max_version)
@ -75,25 +79,27 @@ uint8_t HardFork::get_effective_version(const cryptonote::block &block) const
return version;
}
bool HardFork::do_check(const cryptonote::block &block) const
bool HardFork::do_check(uint8_t version) const
{
return block.major_version >= heights[current_fork_index].version;
return version >= heights[current_fork_index].version;
}
bool HardFork::check(const cryptonote::block &block) const
{
CRITICAL_REGION_LOCAL(lock);
return do_check(block);
return do_check(block.major_version);
}
bool HardFork::add(const cryptonote::block &block, uint64_t height)
bool HardFork::add(uint8_t block_version, uint64_t height)
{
CRITICAL_REGION_LOCAL(lock);
if (!do_check(block))
if (!do_check(block_version))
return false;
const uint8_t version = get_effective_version(block);
db.set_hard_fork_version(height, heights[current_fork_index].version);
const uint8_t version = get_effective_version(block_version);
while (versions.size() >= window_size) {
const uint8_t old_version = versions.front();
@ -105,19 +111,23 @@ bool HardFork::add(const cryptonote::block &block, uint64_t height)
last_versions[version]++;
versions.push_back(version);
uint8_t voted = get_voted_fork_index(height);
uint8_t voted = get_voted_fork_index(height + 1);
if (voted > current_fork_index) {
for (int v = heights[current_fork_index].version + 1; v <= heights[voted].version; ++v) {
db.set_hard_fork_starting_height(v, height);
// we reached the vote threshold with this block, next one will be forked
db.set_hard_fork_starting_height(v, height + 1);
}
current_fork_index = voted;
}
db.set_hard_fork_version(height, heights[current_fork_index].version);
return true;
}
bool HardFork::add(const cryptonote::block &block, uint64_t height)
{
return add(block.major_version, height);
}
void HardFork::init()
{
CRITICAL_REGION_LOCAL(lock);
@ -149,17 +159,29 @@ void HardFork::init()
LOG_PRINT_L1("reorganization done");
}
uint8_t HardFork::get_block_version(uint64_t height) const
{
if (height <= original_version_till_height)
return original_version;
const cryptonote::block &block = db.get_block_from_height(height);
return block.major_version;
}
bool HardFork::reorganize_from_block_height(uint64_t height)
{
CRITICAL_REGION_LOCAL(lock);
if (height >= db.height())
return false;
//db.set_batch_transactions(true);
//db.batch_start();
versions.clear();
for (size_t n = 0; n < 256; ++n)
last_versions[n] = 0;
const uint64_t rescan_height = height >= (window_size - 1) ? height - (window_size - 1) : 0;
const uint64_t rescan_height = height >= (window_size - 1) ? height - (window_size -1) : 0;
const uint8_t start_version = height == 0 ? original_version : db.get_hard_fork_version(height);
while (heights[current_fork_index].version > start_version) {
db.set_hard_fork_starting_height(heights[current_fork_index].version, std::numeric_limits<uint64_t>::max());
@ -167,15 +189,27 @@ bool HardFork::reorganize_from_block_height(uint64_t height)
}
for (uint64_t h = rescan_height; h <= height; ++h) {
cryptonote::block b = db.get_block_from_height(h);
const uint8_t v = get_effective_version(b);
const uint8_t v = get_effective_version(b.major_version);
last_versions[v]++;
versions.push_back(v);
}
uint8_t voted = get_voted_fork_index(height + 1);
if (voted > current_fork_index) {
for (int v = heights[current_fork_index].version + 1; v <= heights[voted].version; ++v) {
// we reached the vote threshold with this block, next one will be forked
db.set_hard_fork_starting_height(v, height + 1);
}
current_fork_index = voted;
}
const uint64_t bc_height = db.height();
for (uint64_t h = height + 1; h < bc_height; ++h) {
add(db.get_block_from_height(h), h);
add(get_block_version(h), h);
}
//db.batch_stop();
return true;
}
@ -224,7 +258,7 @@ HardFork::State HardFork::get_state() const
uint8_t HardFork::get(uint64_t height) const
{
CRITICAL_REGION_LOCAL(lock);
if (height > db.height()) {
if (height >= db.height()) {
assert(false);
return 255;
}

17
src/cryptonote_core/hardfork.h
View file

@ -44,9 +44,10 @@ namespace cryptonote
Ready,
} State;
static const uint64_t DEFAULT_ORIGINAL_VERSION_TILL_HEIGHT = 0; // <= actual height
static const time_t DEFAULT_FORKED_TIME = 31557600; // a year in seconds
static const time_t DEFAULT_UPDATE_TIME = 31557600 / 2;
static const uint64_t DEFAULT_WINDOW_SIZE = 50; // supermajority window check length
static const uint64_t DEFAULT_WINDOW_SIZE = 10080; // supermajority window check length - a week
static const int DEFAULT_THRESHOLD_PERCENT = 80;
/**
@ -58,7 +59,7 @@ namespace cryptonote
* @param window_size the size of the window in blocks to consider for version voting
* @param threshold_percent the size of the majority in percents
*/
HardFork(cryptonote::BlockchainDB &db, uint8_t original_version = 1, time_t forked_time = DEFAULT_FORKED_TIME, time_t update_time = DEFAULT_UPDATE_TIME, uint64_t window_size = DEFAULT_WINDOW_SIZE, int threshold_percent = DEFAULT_THRESHOLD_PERCENT);
HardFork(cryptonote::BlockchainDB &db, uint8_t original_version = 1, uint64_t original_version_till_height = DEFAULT_ORIGINAL_VERSION_TILL_HEIGHT, time_t forked_time = DEFAULT_FORKED_TIME, time_t update_time = DEFAULT_UPDATE_TIME, uint64_t window_size = DEFAULT_WINDOW_SIZE, int threshold_percent = DEFAULT_THRESHOLD_PERCENT);
/**
* @brief add a new hardfork height
@ -182,9 +183,11 @@ namespace cryptonote
private:
bool do_check(const cryptonote::block &block) const;
uint8_t get_block_version(uint64_t height) const;
bool do_check(uint8_t version) const;
int get_voted_fork_index(uint64_t height) const;
uint8_t get_effective_version(const cryptonote::block &block) const;
uint8_t get_effective_version(uint8_t version) const;
bool add(uint8_t block_version, uint64_t height);
private:
@ -196,12 +199,14 @@ namespace cryptonote
int threshold_percent;
uint8_t original_version;
uint64_t original_version_till_height;
typedef struct {
struct Params {
uint8_t version;
uint64_t height;
time_t time;
} Params;
Params(uint8_t version, uint64_t height, time_t time): version(version), height(height), time(time) {}
};
std::vector<Params> heights;
std::deque<uint8_t> versions; /* rolling window of the last N blocks' versions */