import of BlockchainDB files

tried rebasing, tree-filter, and many other things.  at this point,
the history of these files previous to this can live on
in my bc2 branch, as I'm importing them as-is to here.

1 files changed, 135 insertions, 0 deletions

diff --git a/src/cryptonote_core/blockchain_db.cpp b/src/cryptonote_core/blockchain_db.cpp
new file mode 100644
index 000000000..606b34310
--- /dev/null
+++ b/src/cryptonote_core/blockchain_db.cpp
@@ -0,0 +1,135 @@
+// Copyright (c) 2014, 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.
+
+#include "cryptonote_core/blockchain_db.h"
+#include "cryptonote_format_utils.h"
+
+namespace cryptonote
+{
+
+void BlockchainDB::pop_block()
+{
+  block blk;
+  std::vector<transaction> txs;
+  pop_block(blk, txs);
+}
+
+void BlockchainDB::add_transaction(const crypto::hash& blk_hash, const transaction& tx)
+{
+  crypto::hash tx_hash = get_transaction_hash(tx);
+
+  add_transaction_data(blk_hash, tx);
+
+  // iterate tx.vout using indices instead of C++11 foreach syntax because
+  // we need the index
+  for (uint64_t i = 0; i < tx.vout.size(); ++i)
+  {
+    add_output(tx_hash, tx.vout[i], i);
+  }
+
+  for (const txin_v& tx_input : tx.vin)
+  {
+    if (tx_input.type() == typeid(txin_to_key))
+    {
+      add_spent_key(boost::get<txin_to_key>(tx_input).k_image);
+    }
+  }
+}
+
+uint64_t BlockchainDB::add_block( const block& blk
+                  , const size_t& block_size
+                  , const difficulty_type& cumulative_difficulty
+                  , const uint64_t& coins_generated
+                  , const std::vector<transaction>& txs
+                  )
+{
+  try
+  {
+    // call out to subclass implementation to add the block & metadata
+    add_block(blk, block_size, cumulative_difficulty, coins_generated);
+
+    crypto::hash blk_hash = get_block_hash(blk);
+    // call out to add the transactions
+    for (const transaction& tx : txs)
+    {
+      add_transaction(blk_hash, tx);
+    }
+  }
+  // in case any of the add_block process goes awry, undo
+  catch (const std::exception& e)
+  {
+    LOG_ERROR("Error adding block to db: " << e.what());
+    try
+    {
+      pop_block();
+    }
+    // if undoing goes wrong as well, we need to throw, as blockchain
+    // will be in a bad state
+    catch (const std::exception& e)
+    {
+      LOG_ERROR("Error undoing partially added block: " << e.what());
+      throw;
+    }
+    throw;
+  }
+
+  return height();
+}
+
+void BlockchainDB::pop_block(block& blk, std::vector<transaction>& txs)
+{
+  blk = get_top_block();
+  
+  for (const auto& h : blk.tx_hashes)
+  {
+    txs.push_back(get_tx(h));
+    remove_transaction(h);
+  }
+}
+
+void BlockchainDB::remove_transaction(const crypto::hash& tx_hash)
+{
+  transaction tx = get_tx(tx_hash);
+
+  for (const tx_out& tx_output : tx.vout)
+  {
+    remove_output(tx_output);
+  }
+
+  for (const txin_v& tx_input : tx.vin)
+  {
+    if (tx_input.type() == typeid(txin_to_key))
+    {
+      remove_spent_key(boost::get<txin_to_key>(tx_input).k_image);
+    }
+  }
+
+  remove_transaction_data(tx_hash);
+}
+
+}  // namespace cryptonote