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361 lines
8.6 KiB
C++
361 lines
8.6 KiB
C++
//
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// Created by mwo on 5/11/15.
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//
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#include "MicroCore.h"
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namespace
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{
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// NOTE: These values should match blockchain.cpp
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// TODO: Refactor
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const uint64_t mainnet_hard_fork_version_1_till = 1009826;
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const uint64_t testnet_hard_fork_version_1_till = 624633;
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}
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namespace xmreg
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{
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/**
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* The constructor is interesting, as
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* m_mempool and m_blockchain_storage depend
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* on each other.
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*
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* So basically m_mempool is initialized with
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* reference to Blockchain (i.e., Blockchain&)
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* and m_blockchain_storage is initialized with
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* reference to m_mempool (i.e., tx_memory_pool&)
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*
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* The same is done in cryptonode::core.
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*/
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MicroCore::MicroCore():
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m_mempool(m_blockchain_storage),
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m_blockchain_storage(m_mempool)
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{}
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/**
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* Initialized the MicroCore object.
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*
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* Create BlockchainLMDB on the heap.
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* Open database files located in blockchain_path.
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* Initialize m_blockchain_storage with the BlockchainLMDB object.
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*/
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bool
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MicroCore::init(const string& _blockchain_path)
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{
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int db_flags = 0;
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blockchain_path = _blockchain_path;
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//db_flags |= MDB_RDONLY;
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db_flags |= MDB_NOLOCK;
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//db_flags |= MDB_SYNC;
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// uint64_t DEFAULT_FLAGS = MDB_NOMETASYNC | MDB_NORDAHEAD;
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//db_flags = DEFAULT_FLAGS;
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HardFork* m_hardfork = nullptr;
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BlockchainDB* db = nullptr;
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db = new BlockchainLMDB();
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bool use_testnet {false};
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uint64_t hard_fork_version_1_till = use_testnet ? testnet_hard_fork_version_1_till : mainnet_hard_fork_version_1_till;
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m_hardfork = new HardFork(*db, 1, hard_fork_version_1_till);
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try
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{
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// try opening lmdb database files
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db->open(blockchain_path, db_flags);
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}
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catch (const std::exception& e)
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{
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cerr << "Error opening database: " << e.what();
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return false;
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}
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// check if the blockchain database
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// is successful opened
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if(!db->is_open())
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{
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return false;
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}
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// initialize Blockchain object to manage
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// the database.
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return m_blockchain_storage.init(db, m_hardfork, false);
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}
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/**
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* Get m_blockchain_storage.
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* Initialize m_blockchain_storage with the BlockchainLMDB object.
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*/
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Blockchain&
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MicroCore::get_core()
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{
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return m_blockchain_storage;
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}
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/**
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* Get block by its height
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*
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* returns true if success
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*/
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bool
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MicroCore::get_block_by_height(const uint64_t& height, block& blk)
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{
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try
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{
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blk = m_blockchain_storage.get_db().get_block_from_height(height);
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}
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catch (const BLOCK_DNE& e)
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{
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cerr << "Block of height " << height
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<< " not found in the blockchain!"
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<< e.what()
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<< endl;
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return false;
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}
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catch (const DB_ERROR& e)
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{
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cerr << "Blockchain access error when getting block " << height
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<< e.what()
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<< endl;
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return false;
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}
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catch (...)
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{
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cerr << "Something went terribly wrong when getting block " << height
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<< endl;
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return false;
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}
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return true;
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}
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/**
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* Get transaction tx from the blockchain using it hash
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*/
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bool
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MicroCore::get_tx(const crypto::hash& tx_hash, transaction& tx)
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{
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if (m_blockchain_storage.have_tx(tx_hash))
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{
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// get transaction with given hash
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tx = m_blockchain_storage.get_db().get_tx(tx_hash);
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}
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else
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{
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cerr << "MicroCore::get_tx tx does not exist in blockchain: " << tx_hash << endl;
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return false;
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}
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return true;
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}
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bool
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MicroCore::get_tx(const string& tx_hash_str, transaction& tx)
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{
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// parse tx hash string to hash object
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crypto::hash tx_hash;
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if (!xmreg::parse_str_secret_key(tx_hash_str, tx_hash))
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{
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cerr << "Cant parse tx hash: " << tx_hash_str << endl;
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return false;
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}
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if (!get_tx(tx_hash, tx))
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{
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return false;
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}
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return true;
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}
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/**
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* Find output with given public key in a given transaction
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*/
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bool
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MicroCore::find_output_in_tx(const transaction& tx,
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const public_key& output_pubkey,
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tx_out& out,
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size_t& output_index)
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{
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size_t idx {0};
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// search in the ouputs for an output which
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// public key matches to what we want
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auto it = std::find_if(tx.vout.begin(), tx.vout.end(),
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[&](const tx_out& o)
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{
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const txout_to_key& tx_in_to_key
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= boost::get<txout_to_key>(o.target);
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++idx;
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return tx_in_to_key.key == output_pubkey;
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});
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if (it != tx.vout.end())
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{
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// we found the desired public key
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out = *it;
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output_index = idx > 0 ? idx - 1 : idx;
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//cout << idx << " " << output_index << endl;
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return true;
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}
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return false;
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}
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/**
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* Returns tx hash in a given block which
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* contains given output's public key
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*/
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bool
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MicroCore::get_tx_hash_from_output_pubkey(const public_key& output_pubkey,
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const uint64_t& block_height,
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crypto::hash& tx_hash,
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cryptonote::transaction& tx_found)
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{
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tx_hash = null_hash;
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// get block of given height
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block blk;
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if (!get_block_by_height(block_height, blk))
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{
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cerr << "Cant get block of height: " << block_height << endl;
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return false;
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}
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// get all transactions in the block found
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// initialize the first list with transaction for solving
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// the block i.e. coinbase.
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list<transaction> txs {blk.miner_tx};
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list<crypto::hash> missed_txs;
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if (!m_blockchain_storage.get_transactions(blk.tx_hashes, txs, missed_txs))
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{
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cerr << "Cant find transcations in block: " << block_height << endl;
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return false;
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}
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if (!missed_txs.empty())
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{
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cerr << "Transactions not found in blk: " << block_height << endl;
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for (const crypto::hash& h : missed_txs)
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{
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cerr << " - tx hash: " << h << endl;
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}
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return false;
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}
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// search outputs in each transactions
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// until output with pubkey of interest is found
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for (const transaction& tx : txs)
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{
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tx_out found_out;
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// we dont need here output_index
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size_t output_index;
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if (find_output_in_tx(tx, output_pubkey, found_out, output_index))
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{
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// we found the desired public key
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tx_hash = get_transaction_hash(tx);
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tx_found = tx;
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return true;
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}
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}
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return false;
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}
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uint64_t
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MicroCore::get_blk_timestamp(uint64_t blk_height)
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{
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cryptonote::block blk;
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if (!get_block_by_height(blk_height, blk))
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{
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cerr << "Cant get block by height: " << blk_height << endl;
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return 0;
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}
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return blk.timestamp;
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}
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/**
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* De-initialized Blockchain.
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*
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* since blockchain is opened as MDB_RDONLY
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* need to manually free memory taken on heap
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* by BlockchainLMDB
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*/
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MicroCore::~MicroCore()
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{
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delete &m_blockchain_storage.get_db();
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}
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bool
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init_blockchain(const string& path,
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MicroCore& mcore,
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Blockchain*& core_storage)
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{
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// initialize the core using the blockchain path
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if (!mcore.init(path))
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{
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cerr << "Error accessing blockchain." << endl;
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return false;
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}
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// get the high level Blockchain object to interact
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// with the blockchain lmdb database
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core_storage = &(mcore.get_core());
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return true;
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}
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string
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MicroCore::get_blkchain_path()
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{
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return blockchain_path;
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}
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}
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