diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cryptonote_core/blockchain.cpp | 196 | ||||
| -rw-r--r-- | src/cryptonote_core/blockchain.h | 56 |
2 files changed, 179 insertions, 73 deletions
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp index dec0b42ba..3c855d6cd 100644 --- a/src/cryptonote_core/blockchain.cpp +++ b/src/cryptonote_core/blockchain.cpp @@ -1571,6 +1571,98 @@ void Blockchain::add_out_to_get_random_outs(COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_A output_data_t data = m_db->get_output_key(amount, i); oen.out_key = data.pubkey; } + +uint64_t Blockchain::get_num_mature_outputs(uint64_t amount) const +{ + auto num_outs = m_db->get_num_outputs(amount); + // ensure we don't include outputs that aren't yet eligible to be used + // outpouts are sorted by height + while (num_outs > 0) + { + const tx_out_index toi = m_db->get_output_tx_and_index(amount, num_outs - 1); + const uint64_t height = m_db->get_tx_block_height(toi.first); + if (height + CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE <= m_db->height()) + break; + --num_outs; + } + + return num_outs; +} + +std::vector<uint64_t> Blockchain::get_random_outputs(uint64_t amount, uint64_t count) const +{ + uint64_t num_outs = get_num_mature_outputs(amount); + + std::vector<uint64_t> indices; + + std::unordered_set<uint64_t> seen_indices; + + // if there aren't enough outputs to mix with (or just enough), + // use all of them. Eventually this should become impossible. + if (num_outs <= count) + { + for (uint64_t i = 0; i < num_outs; i++) + { + // get tx_hash, tx_out_index from DB + tx_out_index toi = m_db->get_output_tx_and_index(amount, i); + + // if tx is unlocked, add output to indices + if (is_tx_spendtime_unlocked(m_db->get_tx_unlock_time(toi.first))) + { + indices.push_back(i); + } + } + } + else + { + // while we still need more mixins + while (indices.size() < count) + { + // if we've gone through every possible output, we've gotten all we can + if (seen_indices.size() == num_outs) + { + break; + } + + // get a random output index from the DB. If we've already seen it, + // return to the top of the loop and try again, otherwise add it to the + // list of output indices we've seen. + + // triangular distribution over [a,b) with a=0, mode c=b=up_index_limit + uint64_t r = crypto::rand<uint64_t>() % ((uint64_t)1 << 53); + double frac = std::sqrt((double)r / ((uint64_t)1 << 53)); + uint64_t i = (uint64_t)(frac*num_outs); + // just in case rounding up to 1 occurs after sqrt + if (i == num_outs) + --i; + + if (seen_indices.count(i)) + { + continue; + } + seen_indices.emplace(i); + + // get tx_hash, tx_out_index from DB + tx_out_index toi = m_db->get_output_tx_and_index(amount, i); + + // if the output's transaction is unlocked, add the output's index to + // our list. + if (is_tx_spendtime_unlocked(m_db->get_tx_unlock_time(toi.first))) + { + indices.push_back(i); + } + } + } + + return indices; +} + +crypto::public_key Blockchain::get_output_key(uint64_t amount, uint64_t global_index) const +{ + output_data_t data = m_db->get_output_key(amount, global_index); + return data.pubkey; +} + //------------------------------------------------------------------ // This function takes an RPC request for mixins and creates an RPC response // with the requested mixins. @@ -1585,80 +1677,18 @@ bool Blockchain::get_random_outs_for_amounts(const COMMAND_RPC_GET_RANDOM_OUTPUT // from BlockchainDB where <n> is req.outs_count (number of mixins). for (uint64_t amount : req.amounts) { - auto num_outs = m_db->get_num_outputs(amount); - // ensure we don't include outputs that aren't yet eligible to be used - // outpouts are sorted by height - while (num_outs > 0) - { - const tx_out_index toi = m_db->get_output_tx_and_index(amount, num_outs - 1); - const uint64_t height = m_db->get_tx_block_height(toi.first); - if (height + CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE <= m_db->height()) - break; - --num_outs; - } - // create outs_for_amount struct and populate amount field COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::outs_for_amount& result_outs = *res.outs.insert(res.outs.end(), COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::outs_for_amount()); result_outs.amount = amount; - std::unordered_set<uint64_t> seen_indices; - - // if there aren't enough outputs to mix with (or just enough), - // use all of them. Eventually this should become impossible. - if (num_outs <= req.outs_count) - { - for (uint64_t i = 0; i < num_outs; i++) - { - // get tx_hash, tx_out_index from DB - tx_out_index toi = m_db->get_output_tx_and_index(amount, i); - - // if tx is unlocked, add output to result_outs - if (is_tx_spendtime_unlocked(m_db->get_tx_unlock_time(toi.first))) - { - add_out_to_get_random_outs(result_outs, amount, i); - } + std::vector<uint64_t> indices = get_random_outputs(amount, req.outs_count); - } - } - else + for (auto i : indices) { - // while we still need more mixins - while (result_outs.outs.size() < req.outs_count) - { - // if we've gone through every possible output, we've gotten all we can - if (seen_indices.size() == num_outs) - { - break; - } + COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::out_entry& oe = *result_outs.outs.insert(result_outs.outs.end(), COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::out_entry()); - // get a random output index from the DB. If we've already seen it, - // return to the top of the loop and try again, otherwise add it to the - // list of output indices we've seen. - - // triangular distribution over [a,b) with a=0, mode c=b=up_index_limit - uint64_t r = crypto::rand<uint64_t>() % ((uint64_t)1 << 53); - double frac = std::sqrt((double)r / ((uint64_t)1 << 53)); - uint64_t i = (uint64_t)(frac*num_outs); - // just in case rounding up to 1 occurs after sqrt - if (i == num_outs) - --i; - - if (seen_indices.count(i)) - { - continue; - } - seen_indices.emplace(i); - - // get tx_hash, tx_out_index from DB - tx_out_index toi = m_db->get_output_tx_and_index(amount, i); - - // if the output's transaction is unlocked, add the output's index to - // our list. - if (is_tx_spendtime_unlocked(m_db->get_tx_unlock_time(toi.first))) - { - add_out_to_get_random_outs(result_outs, amount, i); - } - } + oe.global_amount_index = i; + oe.out_key = get_output_key(amount, i); } } return true; @@ -1816,6 +1846,15 @@ bool Blockchain::get_outs(const COMMAND_RPC_GET_OUTPUTS_BIN::request& req, COMMA return true; } //------------------------------------------------------------------ +void Blockchain::get_output_key_mask_unlocked(const uint64_t& amount, const uint64_t& index, crypto::public_key& key, rct::key& mask, bool& unlocked) const +{ + const auto o_data = m_db->get_output_key(amount, index); + key = o_data.pubkey; + mask = o_data.commitment; + tx_out_index toi = m_db->get_output_tx_and_index(amount, index); + unlocked = is_tx_spendtime_unlocked(m_db->get_tx_unlock_time(toi.first)); +} +//------------------------------------------------------------------ // This function takes a list of block hashes from another node // on the network to find where the split point is between us and them. // This is used to see what to send another node that needs to sync. @@ -2025,28 +2064,39 @@ void Blockchain::print_blockchain_outs(const std::string& file) const // Find the split point between us and foreign blockchain and return // (by reference) the most recent common block hash along with up to // BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT additional (more recent) hashes. -bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, NOTIFY_RESPONSE_CHAIN_ENTRY::request& resp) const +bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::list<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height) const { LOG_PRINT_L3("Blockchain::" << __func__); CRITICAL_REGION_LOCAL(m_blockchain_lock); // if we can't find the split point, return false - if(!find_blockchain_supplement(qblock_ids, resp.start_height)) + if(!find_blockchain_supplement(qblock_ids, start_height)) { return false; } m_db->block_txn_start(true); - resp.total_height = get_current_blockchain_height(); + current_height = get_current_blockchain_height(); size_t count = 0; - for(size_t i = resp.start_height; i < resp.total_height && count < BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT; i++, count++) + for(size_t i = start_height; i < current_height && count < BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT; i++, count++) { - resp.m_block_ids.push_back(m_db->get_block_hash_from_height(i)); + hashes.push_back(m_db->get_block_hash_from_height(i)); } - resp.cumulative_difficulty = m_db->get_block_cumulative_difficulty(m_db->height() - 1); + m_db->block_txn_stop(); return true; } + +bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, NOTIFY_RESPONSE_CHAIN_ENTRY::request& resp) const +{ + LOG_PRINT_L3("Blockchain::" << __func__); + CRITICAL_REGION_LOCAL(m_blockchain_lock); + + bool result = find_blockchain_supplement(qblock_ids, resp.m_block_ids, resp.start_height, resp.total_height); + resp.cumulative_difficulty = m_db->get_block_cumulative_difficulty(m_db->height() - 1); + + return result; +} //------------------------------------------------------------------ //FIXME: change argument to std::vector, low priority // find split point between ours and foreign blockchain (or start at diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h index 7a138a634..e2da535cd 100644 --- a/src/cryptonote_core/blockchain.h +++ b/src/cryptonote_core/blockchain.h @@ -374,6 +374,22 @@ namespace cryptonote * BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT additional (more recent) hashes. * * @param qblock_ids the foreign chain's "short history" (see get_short_chain_history) + * @param hashes the hashes to be returned, return-by-reference + * @param start_height the start height, return-by-reference + * @param current_height the current blockchain height, return-by-reference + * + * @return true if a block found in common, else false + */ + bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::list<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height) const; + + /** + * @brief get recent block hashes for a foreign chain + * + * Find the split point between us and foreign blockchain and return + * (by reference) the most recent common block hash along with up to + * BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT additional (more recent) hashes. + * + * @param qblock_ids the foreign chain's "short history" (see get_short_chain_history) * @param resp return-by-reference the split height and subsequent blocks' hashes * * @return true if a block found in common, else false @@ -427,6 +443,35 @@ namespace cryptonote bool handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NOTIFY_RESPONSE_GET_OBJECTS::request& rsp); /** + * @brief get number of outputs of an amount past the minimum spendable age + * + * @param amount the output amount + * + * @return the number of mature outputs + */ + uint64_t get_num_mature_outputs(uint64_t amount) const; + + /** + * @brief get random outputs (indices) for an amount + * + * @param amount the amount + * @param count the number of random outputs to choose + * + * @return the outputs' amount-global indices + */ + std::vector<uint64_t> get_random_outputs(uint64_t amount, uint64_t count) const; + + /** + * @brief get the public key for an output + * + * @param amount the output amount + * @param global_index the output amount-global index + * + * @return the public key + */ + crypto::public_key get_output_key(uint64_t amount, uint64_t global_index) const; + + /** * @brief gets random outputs to mix with * * This function takes an RPC request for outputs to mix with @@ -458,6 +503,17 @@ namespace cryptonote bool get_outs(const COMMAND_RPC_GET_OUTPUTS_BIN::request& req, COMMAND_RPC_GET_OUTPUTS_BIN::response& res) const; /** + * @brief gets an output's key and unlocked state + * + * @param amount in - the output amount + * @param index in - the output global amount index + * @param mask out - the output's RingCT mask + * @param key out - the output's key + * @param unlocked out - the output's unlocked state + */ + void get_output_key_mask_unlocked(const uint64_t& amount, const uint64_t& index, crypto::public_key& key, rct::key& mask, bool& unlocked) const; + + /** * @brief gets random ringct outputs to mix with * * This function takes an RPC request for outputs to mix with |