wownero/tests/core_tests/chaingen.cpp
moneromooo-monero 9ef8c7b694
tests: fix tests broken by the removal of the block reward accumulation loop
The tests for rejection of unmixable outputs in v2 are commented out,
as there are no unmixable outputs created anymore. This should be
restored at some point.
2016-05-01 20:59:41 +01:00

666 lines
24 KiB
C++

// Copyright (c) 2014-2016, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#include <vector>
#include <iostream>
#include <sstream>
#include "include_base_utils.h"
#include "console_handler.h"
#include "p2p/net_node.h"
#include "cryptonote_core/cryptonote_basic.h"
#include "cryptonote_core/cryptonote_basic_impl.h"
#include "cryptonote_core/cryptonote_format_utils.h"
#include "cryptonote_core/miner.h"
#include "chaingen.h"
using namespace std;
using namespace epee;
using namespace cryptonote;
void test_generator::get_block_chain(std::vector<block_info>& blockchain, const crypto::hash& head, size_t n) const
{
crypto::hash curr = head;
while (null_hash != curr && blockchain.size() < n)
{
auto it = m_blocks_info.find(curr);
if (m_blocks_info.end() == it)
{
throw std::runtime_error("block hash wasn't found");
}
blockchain.push_back(it->second);
curr = it->second.prev_id;
}
std::reverse(blockchain.begin(), blockchain.end());
}
void test_generator::get_last_n_block_sizes(std::vector<size_t>& block_sizes, const crypto::hash& head, size_t n) const
{
std::vector<block_info> blockchain;
get_block_chain(blockchain, head, n);
BOOST_FOREACH(auto& bi, blockchain)
{
block_sizes.push_back(bi.block_size);
}
}
uint64_t test_generator::get_already_generated_coins(const crypto::hash& blk_id) const
{
auto it = m_blocks_info.find(blk_id);
if (it == m_blocks_info.end())
throw std::runtime_error("block hash wasn't found");
return it->second.already_generated_coins;
}
uint64_t test_generator::get_already_generated_coins(const cryptonote::block& blk) const
{
crypto::hash blk_hash;
get_block_hash(blk, blk_hash);
return get_already_generated_coins(blk_hash);
}
void test_generator::add_block(const cryptonote::block& blk, size_t tsx_size, std::vector<size_t>& block_sizes, uint64_t already_generated_coins)
{
const size_t block_size = tsx_size + get_object_blobsize(blk.miner_tx);
uint64_t block_reward;
get_block_reward(misc_utils::median(block_sizes), block_size, already_generated_coins, block_reward, 1);
m_blocks_info[get_block_hash(blk)] = block_info(blk.prev_id, already_generated_coins + block_reward, block_size);
}
bool test_generator::construct_block(cryptonote::block& blk, uint64_t height, const crypto::hash& prev_id,
const cryptonote::account_base& miner_acc, uint64_t timestamp, uint64_t already_generated_coins,
std::vector<size_t>& block_sizes, const std::list<cryptonote::transaction>& tx_list)
{
blk.major_version = CURRENT_BLOCK_MAJOR_VERSION;
blk.minor_version = CURRENT_BLOCK_MINOR_VERSION;
blk.timestamp = timestamp;
blk.prev_id = prev_id;
blk.tx_hashes.reserve(tx_list.size());
BOOST_FOREACH(const transaction &tx, tx_list)
{
crypto::hash tx_hash;
get_transaction_hash(tx, tx_hash);
blk.tx_hashes.push_back(tx_hash);
}
uint64_t total_fee = 0;
size_t txs_size = 0;
BOOST_FOREACH(auto& tx, tx_list)
{
uint64_t fee = 0;
bool r = get_tx_fee(tx, fee);
CHECK_AND_ASSERT_MES(r, false, "wrong transaction passed to construct_block");
total_fee += fee;
txs_size += get_object_blobsize(tx);
}
blk.miner_tx = AUTO_VAL_INIT(blk.miner_tx);
size_t target_block_size = txs_size + get_object_blobsize(blk.miner_tx);
while (true)
{
if (!construct_miner_tx(height, misc_utils::median(block_sizes), already_generated_coins, target_block_size, total_fee, miner_acc.get_keys().m_account_address, blk.miner_tx, blobdata(), 10))
return false;
size_t actual_block_size = txs_size + get_object_blobsize(blk.miner_tx);
if (target_block_size < actual_block_size)
{
target_block_size = actual_block_size;
}
else if (actual_block_size < target_block_size)
{
size_t delta = target_block_size - actual_block_size;
blk.miner_tx.extra.resize(blk.miner_tx.extra.size() + delta, 0);
actual_block_size = txs_size + get_object_blobsize(blk.miner_tx);
if (actual_block_size == target_block_size)
{
break;
}
else
{
CHECK_AND_ASSERT_MES(target_block_size < actual_block_size, false, "Unexpected block size");
delta = actual_block_size - target_block_size;
blk.miner_tx.extra.resize(blk.miner_tx.extra.size() - delta);
actual_block_size = txs_size + get_object_blobsize(blk.miner_tx);
if (actual_block_size == target_block_size)
{
break;
}
else
{
CHECK_AND_ASSERT_MES(actual_block_size < target_block_size, false, "Unexpected block size");
blk.miner_tx.extra.resize(blk.miner_tx.extra.size() + delta, 0);
target_block_size = txs_size + get_object_blobsize(blk.miner_tx);
}
}
}
else
{
break;
}
}
//blk.tree_root_hash = get_tx_tree_hash(blk);
// Nonce search...
blk.nonce = 0;
while (!miner::find_nonce_for_given_block(blk, get_test_difficulty(), height))
blk.timestamp++;
add_block(blk, txs_size, block_sizes, already_generated_coins);
return true;
}
bool test_generator::construct_block(cryptonote::block& blk, const cryptonote::account_base& miner_acc, uint64_t timestamp)
{
std::vector<size_t> block_sizes;
std::list<cryptonote::transaction> tx_list;
return construct_block(blk, 0, null_hash, miner_acc, timestamp, 0, block_sizes, tx_list);
}
bool test_generator::construct_block(cryptonote::block& blk, const cryptonote::block& blk_prev,
const cryptonote::account_base& miner_acc,
const std::list<cryptonote::transaction>& tx_list/* = std::list<cryptonote::transaction>()*/)
{
uint64_t height = boost::get<txin_gen>(blk_prev.miner_tx.vin.front()).height + 1;
crypto::hash prev_id = get_block_hash(blk_prev);
// Keep difficulty unchanged
uint64_t timestamp = blk_prev.timestamp + DIFFICULTY_BLOCKS_ESTIMATE_TIMESPAN;
uint64_t already_generated_coins = get_already_generated_coins(prev_id);
std::vector<size_t> block_sizes;
get_last_n_block_sizes(block_sizes, prev_id, CRYPTONOTE_REWARD_BLOCKS_WINDOW);
return construct_block(blk, height, prev_id, miner_acc, timestamp, already_generated_coins, block_sizes, tx_list);
}
bool test_generator::construct_block_manually(block& blk, const block& prev_block, const account_base& miner_acc,
int actual_params/* = bf_none*/, uint8_t major_ver/* = 0*/,
uint8_t minor_ver/* = 0*/, uint64_t timestamp/* = 0*/,
const crypto::hash& prev_id/* = crypto::hash()*/, const difficulty_type& diffic/* = 1*/,
const transaction& miner_tx/* = transaction()*/,
const std::vector<crypto::hash>& tx_hashes/* = std::vector<crypto::hash>()*/,
size_t txs_sizes/* = 0*/, size_t max_outs/* = 0*/)
{
blk.major_version = actual_params & bf_major_ver ? major_ver : CURRENT_BLOCK_MAJOR_VERSION;
blk.minor_version = actual_params & bf_minor_ver ? minor_ver : CURRENT_BLOCK_MINOR_VERSION;
blk.timestamp = actual_params & bf_timestamp ? timestamp : prev_block.timestamp + DIFFICULTY_BLOCKS_ESTIMATE_TIMESPAN; // Keep difficulty unchanged
blk.prev_id = actual_params & bf_prev_id ? prev_id : get_block_hash(prev_block);
blk.tx_hashes = actual_params & bf_tx_hashes ? tx_hashes : std::vector<crypto::hash>();
max_outs = actual_params & bf_max_outs ? max_outs : 9999;
size_t height = get_block_height(prev_block) + 1;
uint64_t already_generated_coins = get_already_generated_coins(prev_block);
std::vector<size_t> block_sizes;
get_last_n_block_sizes(block_sizes, get_block_hash(prev_block), CRYPTONOTE_REWARD_BLOCKS_WINDOW);
if (actual_params & bf_miner_tx)
{
blk.miner_tx = miner_tx;
}
else
{
size_t current_block_size = txs_sizes + get_object_blobsize(blk.miner_tx);
// TODO: This will work, until size of constructed block is less then CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE
if (!construct_miner_tx(height, misc_utils::median(block_sizes), already_generated_coins, current_block_size, 0, miner_acc.get_keys().m_account_address, blk.miner_tx, blobdata(), max_outs))
return false;
}
//blk.tree_root_hash = get_tx_tree_hash(blk);
difficulty_type a_diffic = actual_params & bf_diffic ? diffic : get_test_difficulty();
fill_nonce(blk, a_diffic, height);
add_block(blk, txs_sizes, block_sizes, already_generated_coins);
return true;
}
bool test_generator::construct_block_manually_tx(cryptonote::block& blk, const cryptonote::block& prev_block,
const cryptonote::account_base& miner_acc,
const std::vector<crypto::hash>& tx_hashes, size_t txs_size)
{
return construct_block_manually(blk, prev_block, miner_acc, bf_tx_hashes, 0, 0, 0, crypto::hash(), 0, transaction(), tx_hashes, txs_size);
}
struct output_index {
const cryptonote::txout_target_v out;
uint64_t amount;
size_t blk_height; // block height
size_t tx_no; // index of transaction in block
size_t out_no; // index of out in transaction
size_t idx;
bool spent;
const cryptonote::block *p_blk;
const cryptonote::transaction *p_tx;
output_index(const cryptonote::txout_target_v &_out, uint64_t _a, size_t _h, size_t tno, size_t ono, const cryptonote::block *_pb, const cryptonote::transaction *_pt)
: out(_out), amount(_a), blk_height(_h), tx_no(tno), out_no(ono), idx(0), spent(false), p_blk(_pb), p_tx(_pt) { }
output_index(const output_index &other)
: out(other.out), amount(other.amount), blk_height(other.blk_height), tx_no(other.tx_no), out_no(other.out_no), idx(other.idx), spent(other.spent), p_blk(other.p_blk), p_tx(other.p_tx) { }
const std::string toString() const {
std::stringstream ss;
ss << "output_index{blk_height=" << blk_height
<< " tx_no=" << tx_no
<< " out_no=" << out_no
<< " amount=" << amount
<< " idx=" << idx
<< " spent=" << spent
<< "}";
return ss.str();
}
output_index& operator=(const output_index& other)
{
new(this) output_index(other);
return *this;
}
};
typedef std::map<uint64_t, std::vector<size_t> > map_output_t;
typedef std::map<uint64_t, std::vector<output_index> > map_output_idx_t;
typedef pair<uint64_t, size_t> outloc_t;
namespace
{
uint64_t get_inputs_amount(const vector<tx_source_entry> &s)
{
uint64_t r = 0;
BOOST_FOREACH(const tx_source_entry &e, s)
{
r += e.amount;
}
return r;
}
}
bool init_output_indices(map_output_idx_t& outs, std::map<uint64_t, std::vector<size_t> >& outs_mine, const std::vector<cryptonote::block>& blockchain, const map_hash2tx_t& mtx, const cryptonote::account_base& from) {
BOOST_FOREACH (const block& blk, blockchain) {
vector<const transaction*> vtx;
vtx.push_back(&blk.miner_tx);
BOOST_FOREACH(const crypto::hash &h, blk.tx_hashes) {
const map_hash2tx_t::const_iterator cit = mtx.find(h);
if (mtx.end() == cit)
throw std::runtime_error("block contains an unknown tx hash");
vtx.push_back(cit->second);
}
//vtx.insert(vtx.end(), blk.);
// TODO: add all other txes
for (size_t i = 0; i < vtx.size(); i++) {
const transaction &tx = *vtx[i];
for (size_t j = 0; j < tx.vout.size(); ++j) {
const tx_out &out = tx.vout[j];
output_index oi(out.target, out.amount, boost::get<txin_gen>(*blk.miner_tx.vin.begin()).height, i, j, &blk, vtx[i]);
if (2 == out.target.which()) { // out_to_key
outs[out.amount].push_back(oi);
size_t tx_global_idx = outs[out.amount].size() - 1;
outs[out.amount][tx_global_idx].idx = tx_global_idx;
// Is out to me?
if (is_out_to_acc(from.get_keys(), boost::get<txout_to_key>(out.target), get_tx_pub_key_from_extra(tx), j)) {
outs_mine[out.amount].push_back(tx_global_idx);
}
}
}
}
}
return true;
}
bool init_spent_output_indices(map_output_idx_t& outs, map_output_t& outs_mine, const std::vector<cryptonote::block>& blockchain, const map_hash2tx_t& mtx, const cryptonote::account_base& from) {
BOOST_FOREACH (const map_output_t::value_type &o, outs_mine) {
for (size_t i = 0; i < o.second.size(); ++i) {
output_index &oi = outs[o.first][o.second[i]];
// construct key image for this output
crypto::key_image img;
keypair in_ephemeral;
generate_key_image_helper(from.get_keys(), get_tx_pub_key_from_extra(*oi.p_tx), oi.out_no, in_ephemeral, img);
// lookup for this key image in the events vector
BOOST_FOREACH(auto& tx_pair, mtx) {
const transaction& tx = *tx_pair.second;
BOOST_FOREACH(const txin_v &in, tx.vin) {
if (typeid(txin_to_key) == in.type()) {
const txin_to_key &itk = boost::get<txin_to_key>(in);
if (itk.k_image == img) {
oi.spent = true;
}
}
}
}
}
}
return true;
}
bool fill_output_entries(std::vector<output_index>& out_indices, size_t sender_out, size_t nmix, size_t& real_entry_idx, std::vector<tx_source_entry::output_entry>& output_entries)
{
if (out_indices.size() <= nmix)
return false;
bool sender_out_found = false;
size_t rest = nmix;
for (size_t i = 0; i < out_indices.size() && (0 < rest || !sender_out_found); ++i)
{
const output_index& oi = out_indices[i];
if (oi.spent)
continue;
bool append = false;
if (i == sender_out)
{
append = true;
sender_out_found = true;
real_entry_idx = output_entries.size();
}
else if (0 < rest)
{
--rest;
append = true;
}
if (append)
{
const txout_to_key& otk = boost::get<txout_to_key>(oi.out);
output_entries.push_back(tx_source_entry::output_entry(oi.idx, otk.key));
}
}
return 0 == rest && sender_out_found;
}
bool fill_tx_sources(std::vector<tx_source_entry>& sources, const std::vector<test_event_entry>& events,
const block& blk_head, const cryptonote::account_base& from, uint64_t amount, size_t nmix)
{
map_output_idx_t outs;
map_output_t outs_mine;
std::vector<cryptonote::block> blockchain;
map_hash2tx_t mtx;
if (!find_block_chain(events, blockchain, mtx, get_block_hash(blk_head)))
return false;
if (!init_output_indices(outs, outs_mine, blockchain, mtx, from))
return false;
if (!init_spent_output_indices(outs, outs_mine, blockchain, mtx, from))
return false;
// Iterate in reverse is more efficiency
uint64_t sources_amount = 0;
bool sources_found = false;
BOOST_REVERSE_FOREACH(const map_output_t::value_type o, outs_mine)
{
for (size_t i = 0; i < o.second.size() && !sources_found; ++i)
{
size_t sender_out = o.second[i];
const output_index& oi = outs[o.first][sender_out];
if (oi.spent)
continue;
cryptonote::tx_source_entry ts;
ts.amount = oi.amount;
ts.real_output_in_tx_index = oi.out_no;
ts.real_out_tx_key = get_tx_pub_key_from_extra(*oi.p_tx); // incoming tx public key
size_t realOutput;
if (!fill_output_entries(outs[o.first], sender_out, nmix, realOutput, ts.outputs))
continue;
ts.real_output = realOutput;
sources.push_back(ts);
sources_amount += ts.amount;
sources_found = amount <= sources_amount;
}
if (sources_found)
break;
}
return sources_found;
}
bool fill_tx_destination(tx_destination_entry &de, const cryptonote::account_base &to, uint64_t amount) {
de.addr = to.get_keys().m_account_address;
de.amount = amount;
return true;
}
void fill_tx_sources_and_destinations(const std::vector<test_event_entry>& events, const block& blk_head,
const cryptonote::account_base& from, const cryptonote::account_base& to,
uint64_t amount, uint64_t fee, size_t nmix, std::vector<tx_source_entry>& sources,
std::vector<tx_destination_entry>& destinations)
{
sources.clear();
destinations.clear();
if (!fill_tx_sources(sources, events, blk_head, from, amount + fee, nmix))
throw std::runtime_error("couldn't fill transaction sources");
tx_destination_entry de;
if (!fill_tx_destination(de, to, amount))
throw std::runtime_error("couldn't fill transaction destination");
destinations.push_back(de);
tx_destination_entry de_change;
uint64_t cache_back = get_inputs_amount(sources) - (amount + fee);
if (0 < cache_back)
{
if (!fill_tx_destination(de_change, from, cache_back))
throw std::runtime_error("couldn't fill transaction cache back destination");
destinations.push_back(de_change);
}
}
void fill_nonce(cryptonote::block& blk, const difficulty_type& diffic, uint64_t height)
{
blk.nonce = 0;
while (!miner::find_nonce_for_given_block(blk, diffic, height))
blk.timestamp++;
}
bool construct_miner_tx_manually(size_t height, uint64_t already_generated_coins,
const account_public_address& miner_address, transaction& tx, uint64_t fee,
keypair* p_txkey/* = 0*/)
{
keypair txkey;
txkey = keypair::generate();
add_tx_pub_key_to_extra(tx, txkey.pub);
if (0 != p_txkey)
*p_txkey = txkey;
txin_gen in;
in.height = height;
tx.vin.push_back(in);
// This will work, until size of constructed block is less then CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE
uint64_t block_reward;
if (!get_block_reward(0, 0, already_generated_coins, block_reward, 1))
{
LOG_PRINT_L0("Block is too big");
return false;
}
block_reward += fee;
crypto::key_derivation derivation;
crypto::public_key out_eph_public_key;
crypto::generate_key_derivation(miner_address.m_view_public_key, txkey.sec, derivation);
crypto::derive_public_key(derivation, 0, miner_address.m_spend_public_key, out_eph_public_key);
tx_out out;
out.amount = block_reward;
out.target = txout_to_key(out_eph_public_key);
tx.vout.push_back(out);
tx.version = CURRENT_TRANSACTION_VERSION;
tx.unlock_time = height + CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW;
return true;
}
bool construct_tx_to_key(const std::vector<test_event_entry>& events, cryptonote::transaction& tx, const block& blk_head,
const cryptonote::account_base& from, const cryptonote::account_base& to, uint64_t amount,
uint64_t fee, size_t nmix)
{
vector<tx_source_entry> sources;
vector<tx_destination_entry> destinations;
fill_tx_sources_and_destinations(events, blk_head, from, to, amount, fee, nmix, sources, destinations);
return construct_tx(from.get_keys(), sources, destinations, std::vector<uint8_t>(), tx, 0);
}
transaction construct_tx_with_fee(std::vector<test_event_entry>& events, const block& blk_head,
const account_base& acc_from, const account_base& acc_to, uint64_t amount, uint64_t fee)
{
transaction tx;
construct_tx_to_key(events, tx, blk_head, acc_from, acc_to, amount, fee, 0);
events.push_back(tx);
return tx;
}
uint64_t get_balance(const cryptonote::account_base& addr, const std::vector<cryptonote::block>& blockchain, const map_hash2tx_t& mtx) {
uint64_t res = 0;
std::map<uint64_t, std::vector<output_index> > outs;
std::map<uint64_t, std::vector<size_t> > outs_mine;
map_hash2tx_t confirmed_txs;
get_confirmed_txs(blockchain, mtx, confirmed_txs);
if (!init_output_indices(outs, outs_mine, blockchain, confirmed_txs, addr))
return false;
if (!init_spent_output_indices(outs, outs_mine, blockchain, confirmed_txs, addr))
return false;
BOOST_FOREACH (const map_output_t::value_type &o, outs_mine) {
for (size_t i = 0; i < o.second.size(); ++i) {
if (outs[o.first][o.second[i]].spent)
continue;
res += outs[o.first][o.second[i]].amount;
}
}
return res;
}
void get_confirmed_txs(const std::vector<cryptonote::block>& blockchain, const map_hash2tx_t& mtx, map_hash2tx_t& confirmed_txs)
{
std::unordered_set<crypto::hash> confirmed_hashes;
BOOST_FOREACH(const block& blk, blockchain)
{
BOOST_FOREACH(const crypto::hash& tx_hash, blk.tx_hashes)
{
confirmed_hashes.insert(tx_hash);
}
}
BOOST_FOREACH(const auto& tx_pair, mtx)
{
if (0 != confirmed_hashes.count(tx_pair.first))
{
confirmed_txs.insert(tx_pair);
}
}
}
bool find_block_chain(const std::vector<test_event_entry>& events, std::vector<cryptonote::block>& blockchain, map_hash2tx_t& mtx, const crypto::hash& head) {
std::unordered_map<crypto::hash, const block*> block_index;
BOOST_FOREACH(const test_event_entry& ev, events)
{
if (typeid(block) == ev.type())
{
const block* blk = &boost::get<block>(ev);
block_index[get_block_hash(*blk)] = blk;
}
else if (typeid(transaction) == ev.type())
{
const transaction& tx = boost::get<transaction>(ev);
mtx[get_transaction_hash(tx)] = &tx;
}
}
bool b_success = false;
crypto::hash id = head;
for (auto it = block_index.find(id); block_index.end() != it; it = block_index.find(id))
{
blockchain.push_back(*it->second);
id = it->second->prev_id;
if (null_hash == id)
{
b_success = true;
break;
}
}
reverse(blockchain.begin(), blockchain.end());
return b_success;
}
void test_chain_unit_base::register_callback(const std::string& cb_name, verify_callback cb)
{
m_callbacks[cb_name] = cb;
}
bool test_chain_unit_base::verify(const std::string& cb_name, cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry> &events)
{
auto cb_it = m_callbacks.find(cb_name);
if(cb_it == m_callbacks.end())
{
LOG_ERROR("Failed to find callback " << cb_name);
return false;
}
return cb_it->second(c, ev_index, events);
}