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// Copyright (c) 2014-2015, 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
#pragma once
#include <boost/serialization/serialization.hpp>
#include <boost/serialization/version.hpp>
#include <boost/serialization/list.hpp>
#include <boost/multi_index_container.hpp>
#include <boost/multi_index/global_fun.hpp>
#include <boost/multi_index/hashed_index.hpp>
#include <boost/multi_index/member.hpp>
#include <boost/foreach.hpp>
#include <atomic>
#include <unordered_map>
#include <unordered_set>
#include "syncobj.h"
#include "string_tools.h"
#include "cryptonote_basic.h"
#include "common/util.h"
#include "cryptonote_protocol/cryptonote_protocol_defs.h"
#include "rpc/core_rpc_server_commands_defs.h"
#include "difficulty.h"
#include "cryptonote_core/cryptonote_format_utils.h"
#include "verification_context.h"
#include "crypto/hash.h"
#include "checkpoints.h"
#include "hardfork.h"
#include "blockchain_db/blockchain_db.h"
namespace cryptonote
{
class tx_memory_pool;
enum blockchain_db_sync_mode
{
db_sync,
db_async,
db_nosync
};
/************************************************************************/
/* */
/************************************************************************/
class Blockchain
{
public:
struct transaction_chain_entry
{
transaction tx;
uint64_t m_keeper_block_height;
size_t m_blob_size;
std::vector<uint64_t> m_global_output_indexes;
};
struct block_extended_info
{
block bl;
uint64_t height;
size_t block_cumulative_size;
difficulty_type cumulative_difficulty;
uint64_t already_generated_coins;
};
Blockchain(tx_memory_pool& tx_pool);
bool init(BlockchainDB* db, const bool testnet = false);
bool deinit();
void set_checkpoints(checkpoints&& chk_pts) { m_checkpoints = chk_pts; }
//bool push_new_block();
bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks, std::list<transaction>& txs) const;
bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const;
bool get_alternative_blocks(std::list<block>& blocks) const;
size_t get_alternative_blocks_count() const;
crypto::hash get_block_id_by_height(uint64_t height) const;
bool get_block_by_hash(const crypto::hash &h, block &blk) const;
void get_all_known_block_ids(std::list<crypto::hash> &main, std::list<crypto::hash> &alt, std::list<crypto::hash> &invalid) const;
bool prepare_handle_incoming_blocks(const std::list<block_complete_entry> &blocks);
bool cleanup_handle_incoming_blocks(bool force_sync = false);
bool have_tx(const crypto::hash &id) const;
bool have_tx_keyimges_as_spent(const transaction &tx) const;
bool have_tx_keyimg_as_spent(const crypto::key_image &key_im) const;
uint64_t get_current_blockchain_height() const;
crypto::hash get_tail_id() const;
crypto::hash get_tail_id(uint64_t& height) const;
difficulty_type get_difficulty_for_next_block();
bool add_new_block(const block& bl_, block_verification_context& bvc);
bool reset_and_set_genesis_block(const block& b);
bool create_block_template(block& b, const account_public_address& miner_address, difficulty_type& di, uint64_t& height, const blobdata& ex_nonce);
bool have_block(const crypto::hash& id) const;
size_t get_total_transactions() const;
bool get_short_chain_history(std::list<crypto::hash>& ids) const;
bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, NOTIFY_RESPONSE_CHAIN_ENTRY::request& resp) const;
bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, uint64_t& starter_offset) const;
bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<block, std::list<transaction> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const;
bool handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NOTIFY_RESPONSE_GET_OBJECTS::request& rsp);
bool handle_get_objects(const COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::request& req, COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::response& res);
bool get_random_outs_for_amounts(const COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::request& req, COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::response& res) const;
bool get_tx_outputs_gindexs(const crypto::hash& tx_id, std::vector<uint64_t>& indexs) const;
bool store_blockchain();
bool check_tx_inputs(const transaction& tx, uint64_t& pmax_used_block_height, crypto::hash& max_used_block_id, bool kept_by_block = false);
bool check_tx_outputs(const transaction& tx);
uint64_t get_current_cumulative_blocksize_limit() const;
bool is_storing_blockchain()const{return m_is_blockchain_storing;}
uint64_t block_difficulty(uint64_t i) const;
template<class t_ids_container, class t_blocks_container, class t_missed_container>
bool get_blocks(const t_ids_container& block_ids, t_blocks_container& blocks, t_missed_container& missed_bs) const;
template<class t_ids_container, class t_tx_container, class t_missed_container>
bool get_transactions(const t_ids_container& txs_ids, t_tx_container& txs, t_missed_container& missed_txs) const;
//debug functions
void print_blockchain(uint64_t start_index, uint64_t end_index) const;
void print_blockchain_index() const;
void print_blockchain_outs(const std::string& file) const;
void check_against_checkpoints(const checkpoints& points, bool enforce);
void set_enforce_dns_checkpoints(bool enforce);
bool update_checkpoints(const std::string& file_path, bool check_dns);
// user options, must be called before calling init()
void set_user_options(uint64_t block_threads, uint64_t blocks_per_sync,
blockchain_db_sync_mode sync_mode, bool fast_sync);
void set_show_time_stats(bool stats) { m_show_time_stats = stats; }
HardFork::State get_hard_fork_state() const;
uint8_t get_current_hard_fork_version() const { return m_hardfork->get_current_version(); }
uint8_t get_ideal_hard_fork_version() const { return m_hardfork->get_ideal_version(); }
bool get_hard_fork_voting_info(uint8_t version, uint32_t &window, uint32_t &votes, uint32_t &threshold, uint8_t &voting) const;
bool for_all_key_images(std::function<bool(const crypto::key_image&)>) const;
bool for_all_blocks(std::function<bool(uint64_t, const crypto::hash&, const block&)>) const;
bool for_all_transactions(std::function<bool(const crypto::hash&, const cryptonote::transaction&)>) const;
bool for_all_outputs(std::function<bool(uint64_t amount, const crypto::hash &tx_hash, size_t tx_idx)>) const;
BlockchainDB& get_db()
{
return *m_db;
}
void output_scan_worker(const uint64_t amount,const std::vector<uint64_t> &offsets,
std::vector<output_data_t> &outputs, std::unordered_map<crypto::hash,
cryptonote::transaction> &txs) const;
void block_longhash_worker(const uint64_t height, const std::vector<block> &blocks,
std::unordered_map<crypto::hash, crypto::hash> &map) const;
private:
typedef std::unordered_map<crypto::hash, size_t> blocks_by_id_index;
typedef std::unordered_map<crypto::hash, transaction_chain_entry> transactions_container;
typedef std::unordered_set<crypto::key_image> key_images_container;
typedef std::vector<block_extended_info> blocks_container;
typedef std::unordered_map<crypto::hash, block_extended_info> blocks_ext_by_hash;
typedef std::unordered_map<crypto::hash, block> blocks_by_hash;
typedef std::map<uint64_t, std::vector<std::pair<crypto::hash, size_t>>> outputs_container; //crypto::hash - tx hash, size_t - index of out in transaction
BlockchainDB* m_db;
tx_memory_pool& m_tx_pool;
mutable epee::critical_section m_blockchain_lock; // TODO: add here reader/writer lock
// main chain
blocks_container m_blocks; // height -> block_extended_info
blocks_by_id_index m_blocks_index; // crypto::hash -> height
transactions_container m_transactions;
size_t m_current_block_cumul_sz_limit;
std::unordered_map<crypto::hash, std::unordered_map<crypto::key_image, std::vector<output_data_t>>> m_scan_table;
std::unordered_map<crypto::hash, std::pair<bool, uint64_t>> m_check_tx_inputs_table;
std::unordered_map<crypto::hash, crypto::hash> m_blocks_longhash_table;
std::unordered_map<crypto::hash, std::unordered_map<crypto::key_image, bool>> m_check_txin_table;
// SHA-3 hashes for each block and for fast pow checking
std::vector<crypto::hash> m_blocks_hash_check;
std::vector<crypto::hash> m_blocks_txs_check;
blockchain_db_sync_mode m_db_sync_mode;
bool m_fast_sync;
bool m_show_time_stats;
uint64_t m_db_blocks_per_sync;
uint64_t m_max_prepare_blocks_threads;
uint64_t m_fake_pow_calc_time;
uint64_t m_fake_scan_time;
uint64_t m_sync_counter;
std::vector<uint64_t> m_timestamps;
std::vector<difficulty_type> m_difficulties;
uint64_t m_timestamps_and_difficulties_height;
boost::asio::io_service m_async_service;
boost::thread_group m_async_pool;
std::unique_ptr<boost::asio::io_service::work> m_async_work_idle;
// all alternative chains
blocks_ext_by_hash m_alternative_chains; // crypto::hash -> block_extended_info
// some invalid blocks
blocks_ext_by_hash m_invalid_blocks; // crypto::hash -> block_extended_info
outputs_container m_outputs;
checkpoints m_checkpoints;
std::atomic<bool> m_is_in_checkpoint_zone;
std::atomic<bool> m_is_blockchain_storing;
bool m_enforce_dns_checkpoints;
HardFork *m_hardfork;
template<class visitor_t>
inline bool scan_outputkeys_for_indexes(const txin_to_key& tx_in_to_key, visitor_t &vis, const crypto::hash &tx_prefix_hash, uint64_t* pmax_related_block_height = NULL) const;
bool check_tx_input(const txin_to_key& txin, const crypto::hash& tx_prefix_hash, const std::vector<crypto::signature>& sig, std::vector<crypto::public_key> &output_keys, uint64_t* pmax_related_block_height);
bool check_tx_inputs(const transaction& tx, uint64_t* pmax_used_block_height = NULL);
bool switch_to_alternative_blockchain(std::list<blocks_ext_by_hash::iterator>& alt_chain, bool discard_disconnected_chain);
block pop_block_from_blockchain();
bool handle_block_to_main_chain(const block& bl, block_verification_context& bvc);
bool handle_block_to_main_chain(const block& bl, const crypto::hash& id, block_verification_context& bvc);
bool handle_alternative_block(const block& b, const crypto::hash& id, block_verification_context& bvc);
difficulty_type get_next_difficulty_for_alternative_chain(const std::list<blocks_ext_by_hash::iterator>& alt_chain, block_extended_info& bei) const;
bool prevalidate_miner_transaction(const block& b, uint64_t height);
bool validate_miner_transaction(const block& b, size_t cumulative_block_size, uint64_t fee, uint64_t& base_reward, uint64_t already_generated_coins);
bool validate_transaction(const block& b, uint64_t height, const transaction& tx);
bool rollback_blockchain_switching(std::list<block>& original_chain, uint64_t rollback_height);
bool add_transaction_from_block(const transaction& tx, const crypto::hash& tx_id, const crypto::hash& bl_id, uint64_t bl_height);
bool push_transaction_to_global_outs_index(const transaction& tx, const crypto::hash& tx_id, std::vector<uint64_t>& global_indexes);
bool pop_transaction_from_global_index(const transaction& tx, const crypto::hash& tx_id);
void get_last_n_blocks_sizes(std::vector<size_t>& sz, size_t count) const;
void add_out_to_get_random_outs(COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::outs_for_amount& result_outs, uint64_t amount, size_t i) const;
bool is_tx_spendtime_unlocked(uint64_t unlock_time) const;
bool add_block_as_invalid(const block& bl, const crypto::hash& h);
bool add_block_as_invalid(const block_extended_info& bei, const crypto::hash& h);
bool check_block_timestamp(const block& b) const;
bool check_block_timestamp(std::vector<uint64_t>& timestamps, const block& b) const;
uint64_t get_adjusted_time() const;
bool complete_timestamps_vector(uint64_t start_height, std::vector<uint64_t>& timestamps);
bool update_next_cumulative_size_limit();
bool check_for_double_spend(const transaction& tx, key_images_container& keys_this_block) const;
void get_timestamp_and_difficulty(uint64_t ×tamp, difficulty_type &difficulty, const int offset) const;
void check_ring_signature(const crypto::hash &tx_prefix_hash, const crypto::key_image &key_image,
const std::vector<crypto::public_key> &pubkeys, const std::vector<crypto::signature> &sig, uint64_t &result);
};
} // namespace cryptonote
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