Merge pull request #21 from warptangent/fix_block_reorg

Fixes and additions for block reorganization
This commit is contained in:
Thomas Winget 2015-01-12 14:24:18 -05:00
commit d43782f041
5 changed files with 139 additions and 37 deletions

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@ -262,7 +262,7 @@ void BlockchainLMDB::add_transaction_data(const crypto::hash& blk_hash, const tr
throw0(DB_ERROR("Failed to add tx unlock time to db transaction")); throw0(DB_ERROR("Failed to add tx unlock time to db transaction"));
} }
void BlockchainLMDB::remove_transaction_data(const crypto::hash& tx_hash) void BlockchainLMDB::remove_transaction_data(const crypto::hash& tx_hash, const transaction& tx)
{ {
LOG_PRINT_L3("BlockchainLMDB::" << __func__); LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open(); check_open();
@ -279,7 +279,7 @@ void BlockchainLMDB::remove_transaction_data(const crypto::hash& tx_hash)
if (mdb_del(*m_write_txn, m_tx_heights, &val_h, NULL)) if (mdb_del(*m_write_txn, m_tx_heights, &val_h, NULL))
throw1(DB_ERROR("Failed to add removal of tx block height to db transaction")); throw1(DB_ERROR("Failed to add removal of tx block height to db transaction"));
remove_tx_outputs(tx_hash); remove_tx_outputs(tx_hash, tx);
if (mdb_del(*m_write_txn, m_tx_outputs, &val_h, NULL)) if (mdb_del(*m_write_txn, m_tx_outputs, &val_h, NULL))
throw1(DB_ERROR("Failed to add removal of tx outputs to db transaction")); throw1(DB_ERROR("Failed to add removal of tx outputs to db transaction"));
@ -330,8 +330,9 @@ void BlockchainLMDB::add_output(const crypto::hash& tx_hash, const tx_out& tx_ou
m_num_outputs++; m_num_outputs++;
} }
void BlockchainLMDB::remove_tx_outputs(const crypto::hash& tx_hash) void BlockchainLMDB::remove_tx_outputs(const crypto::hash& tx_hash, const transaction& tx)
{ {
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
lmdb_cur cur(*m_write_txn, m_tx_outputs); lmdb_cur cur(*m_write_txn, m_tx_outputs);
@ -356,7 +357,8 @@ void BlockchainLMDB::remove_tx_outputs(const crypto::hash& tx_hash)
for (uint64_t i = 0; i < num_elems; ++i) for (uint64_t i = 0; i < num_elems; ++i)
{ {
remove_output(*(const uint64_t*)v.mv_data); const tx_out tx_output = tx.vout[i];
remove_output(*(const uint64_t*)v.mv_data, tx_output.amount);
if (i < num_elems - 1) if (i < num_elems - 1)
{ {
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP); mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
@ -367,17 +369,19 @@ void BlockchainLMDB::remove_tx_outputs(const crypto::hash& tx_hash)
cur.close(); cur.close();
} }
// TODO: probably remove this function
void BlockchainLMDB::remove_output(const tx_out& tx_output) void BlockchainLMDB::remove_output(const tx_out& tx_output)
{ {
LOG_PRINT_L3("BlockchainLMDB::" << __func__ << " (unused version - does nothing)");
return; return;
} }
void BlockchainLMDB::remove_output(const uint64_t& out_index) void BlockchainLMDB::remove_output(const uint64_t& out_index, const uint64_t amount)
{ {
LOG_PRINT_L3("BlockchainLMDB::" << __func__); LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open(); check_open();
MDB_val k; MDB_val_copy<uint64_t> k(out_index);
MDB_val v; MDB_val v;
/****** Uncomment if ever outputs actually need to be stored in this manner /****** Uncomment if ever outputs actually need to be stored in this manner
@ -400,29 +404,94 @@ void BlockchainLMDB::remove_output(const uint64_t& out_index)
throw1(DB_ERROR("Error adding removal of output to db transaction")); throw1(DB_ERROR("Error adding removal of output to db transaction"));
*********************************************************************/ *********************************************************************/
auto result = mdb_del(*m_write_txn, m_output_indices, &v, NULL); auto result = mdb_del(*m_write_txn, m_output_indices, &k, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of output tx index to db transaction"));
result = mdb_del(*m_write_txn, m_output_txs, &v, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of output tx hash to db transaction"));
result = mdb_del(*m_write_txn, m_output_amounts, &v, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of output amount to db transaction"));
result = mdb_del(*m_write_txn, m_output_keys, &v, NULL);
if (result == MDB_NOTFOUND) if (result == MDB_NOTFOUND)
{ {
LOG_PRINT_L2("Removing output, no public key found."); LOG_PRINT_L0("Unexpected: global output index not found in m_output_indices");
}
else if (result)
{
throw1(DB_ERROR("Error adding removal of output tx index to db transaction"));
}
result = mdb_del(*m_write_txn, m_output_txs, &k, NULL);
// if (result != 0 && result != MDB_NOTFOUND)
// throw1(DB_ERROR("Error adding removal of output tx hash to db transaction"));
if (result == MDB_NOTFOUND)
{
LOG_PRINT_L0("Unexpected: global output index not found in m_output_txs");
}
else if (result)
{
throw1(DB_ERROR("Error adding removal of output tx hash to db transaction"));
}
result = mdb_del(*m_write_txn, m_output_keys, &k, NULL);
if (result == MDB_NOTFOUND)
{
LOG_PRINT_L0("Unexpected: global output index not found in m_output_keys");
} }
else if (result) else if (result)
throw1(DB_ERROR("Error adding removal of output pubkey to db transaction")); throw1(DB_ERROR("Error adding removal of output pubkey to db transaction"));
remove_amount_output_index(amount, out_index);
m_num_outputs--; m_num_outputs--;
} }
void BlockchainLMDB::remove_amount_output_index(const uint64_t amount, const uint64_t global_output_index)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
lmdb_cur cur(*m_write_txn, m_output_amounts);
MDB_val_copy<uint64_t> k(amount);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
mdb_cursor_get(cur, &k, &v, MDB_FIRST_DUP);
uint64_t amount_output_index = 0;
uint64_t goi = 0;
bool found_index = false;
for (uint64_t i = 0; i < num_elems; ++i)
{
mdb_cursor_get(cur, &k, &v, MDB_GET_CURRENT);
goi = *(const uint64_t *)v.mv_data;
if (goi == global_output_index)
{
amount_output_index = i;
found_index = true;
break;
}
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
if (found_index)
{
// found the amount output index
// now delete it
result = mdb_cursor_del(cur, 0);
if (result)
throw0(DB_ERROR(std::string("Error deleting amount output index ").append(boost::lexical_cast<std::string>(amount_output_index)).c_str()));
}
else
{
// not found
cur.close();
throw1(OUTPUT_DNE("Failed to find amount output index"));
}
cur.close();
}
void BlockchainLMDB::add_spent_key(const crypto::key_image& k_image) void BlockchainLMDB::add_spent_key(const crypto::key_image& k_image)
{ {
LOG_PRINT_L3("BlockchainLMDB::" << __func__); LOG_PRINT_L3("BlockchainLMDB::" << __func__);

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@ -190,15 +190,16 @@ private:
virtual void add_transaction_data(const crypto::hash& blk_hash, const transaction& tx); virtual void add_transaction_data(const crypto::hash& blk_hash, const transaction& tx);
virtual void remove_transaction_data(const crypto::hash& tx_hash); virtual void remove_transaction_data(const crypto::hash& tx_hash, const transaction& tx);
virtual void add_output(const crypto::hash& tx_hash, const tx_out& tx_output, const uint64_t& local_index); virtual void add_output(const crypto::hash& tx_hash, const tx_out& tx_output, const uint64_t& local_index);
virtual void remove_output(const tx_out& tx_output); virtual void remove_output(const tx_out& tx_output);
void remove_tx_outputs(const crypto::hash& tx_hash); void remove_tx_outputs(const crypto::hash& tx_hash, const transaction& tx);
void remove_output(const uint64_t& out_index); void remove_output(const uint64_t& out_index, const uint64_t amount);
void remove_amount_output_index(const uint64_t amount, const uint64_t global_output_index);
virtual void add_spent_key(const crypto::key_image& k_image); virtual void add_spent_key(const crypto::key_image& k_image);

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@ -1113,7 +1113,7 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
if(alt_chain.size()) if(alt_chain.size())
{ {
// make sure alt chain doesn't somehow start past the end of the main chain // make sure alt chain doesn't somehow start past the end of the main chain
CHECK_AND_ASSERT_MES(m_db->height() - 1 > alt_chain.front()->second.height, false, "main blockchain wrong height"); CHECK_AND_ASSERT_MES(m_db->height() > alt_chain.front()->second.height, false, "main blockchain wrong height");
// make sure that the blockchain contains the block that should connect // make sure that the blockchain contains the block that should connect
// this alternate chain with it. // this alternate chain with it.
@ -1188,8 +1188,16 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
// FIXME: // FIXME:
// this brings up an interesting point: consider allowing to get block // this brings up an interesting point: consider allowing to get block
// difficulty both by height OR by hash, not just height. // difficulty both by height OR by hash, not just height.
auto main_chain_cumulative_difficulty = m_db->get_block_cumulative_difficulty(m_db->get_block_height(b.prev_id)); difficulty_type main_chain_cumulative_difficulty = m_db->get_block_cumulative_difficulty(m_db->height() - 1);
bei.cumulative_difficulty = alt_chain.size() ? it_prev->second.cumulative_difficulty : main_chain_cumulative_difficulty; if (alt_chain.size())
{
bei.cumulative_difficulty = it_prev->second.cumulative_difficulty;
}
else
{
// passed-in block's previous block's cumulative difficulty, found on the main chain
bei.cumulative_difficulty = m_db->get_block_cumulative_difficulty(m_db->get_block_height(b.prev_id));
}
bei.cumulative_difficulty += current_diff; bei.cumulative_difficulty += current_diff;
// add block to alternate blocks storage, // add block to alternate blocks storage,
@ -1216,8 +1224,8 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
{ {
//do reorganize! //do reorganize!
LOG_PRINT_GREEN("###### REORGANIZE on height: " LOG_PRINT_GREEN("###### REORGANIZE on height: "
<< alt_chain.front()->second.height << " of " << m_db->height() << alt_chain.front()->second.height << " of " << m_db->height() - 1
<< " with cum_difficulty " << m_db->get_block_cumulative_difficulty(m_db->height()) << " with cum_difficulty " << m_db->get_block_cumulative_difficulty(m_db->height() - 1)
<< std::endl << " alternative blockchain size: " << alt_chain.size() << std::endl << " alternative blockchain size: " << alt_chain.size()
<< " with cum_difficulty " << bei.cumulative_difficulty, LOG_LEVEL_0 << " with cum_difficulty " << bei.cumulative_difficulty, LOG_LEVEL_0
); );
@ -1699,13 +1707,22 @@ bool Blockchain::have_block(const crypto::hash& id) const
CRITICAL_REGION_LOCAL(m_blockchain_lock); CRITICAL_REGION_LOCAL(m_blockchain_lock);
if(m_db->block_exists(id)) if(m_db->block_exists(id))
{
LOG_PRINT_L3("block exists in main chain");
return true; return true;
}
if(m_alternative_chains.count(id)) if(m_alternative_chains.count(id))
{
LOG_PRINT_L3("block found in m_alternative_chains");
return true; return true;
}
if(m_invalid_blocks.count(id)) if(m_invalid_blocks.count(id))
{
LOG_PRINT_L3("block found in m_invalid_blocks");
return true; return true;
}
return false; return false;
} }
@ -2010,14 +2027,25 @@ bool Blockchain::check_block_timestamp(const block& b) const
bool Blockchain::handle_block_to_main_chain(const block& bl, const crypto::hash& id, block_verification_context& bvc) bool Blockchain::handle_block_to_main_chain(const block& bl, const crypto::hash& id, block_verification_context& bvc)
{ {
LOG_PRINT_L3("Blockchain::" << __func__); LOG_PRINT_L3("Blockchain::" << __func__);
// NOTE: Omitting check below with have_block() It causes an error after a
// blockchain reorganize begins with error: "Attempting to add block to main
// chain, but it's already either there or in an alternate"
//
// A block in the alternative chain, desired to become the main chain, never
// makes it due to have_block finding it in he alternative chain.
//
// Original implementation didn't use it here, and it doesn't appear
// necessary to be called from here in this implementation either.
// if we already have the block, return false // if we already have the block, return false
if (have_block(id)) // if (have_block(id))
{ // {
LOG_PRINT_L0("Attempting to add block to main chain, but it's already either there or in an alternate chain. hash: " << id); // LOG_PRINT_L0("Attempting to add block to main chain, but it's already either there or in an alternate chain. hash: " << id);
bvc.m_verifivation_failed = true; // bvc.m_verifivation_failed = true;
return false; // return false;
} // }
TIME_MEASURE_START(block_processing_time); TIME_MEASURE_START(block_processing_time);
CRITICAL_REGION_LOCAL(m_blockchain_lock); CRITICAL_REGION_LOCAL(m_blockchain_lock);
if(bl.prev_id != get_tail_id()) if(bl.prev_id != get_tail_id())

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@ -107,6 +107,9 @@ void BlockchainDB::remove_transaction(const crypto::hash& tx_hash)
{ {
transaction tx = get_tx(tx_hash); transaction tx = get_tx(tx_hash);
// TODO: This loop calling remove_output() should be removed. It doesn't do
// anything (function is empty), and the outputs were already intended to be
// removed later as part of remove_transaction_data().
for (const tx_out& tx_output : tx.vout) for (const tx_out& tx_output : tx.vout)
{ {
remove_output(tx_output); remove_output(tx_output);
@ -120,7 +123,8 @@ void BlockchainDB::remove_transaction(const crypto::hash& tx_hash)
} }
} }
remove_transaction_data(tx_hash); // need tx as tx.vout has the tx outputs, and the output amounts are needed
remove_transaction_data(tx_hash, tx);
} }
} // namespace cryptonote } // namespace cryptonote

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@ -274,7 +274,7 @@ private:
virtual void add_transaction_data(const crypto::hash& blk_hash, const transaction& tx) = 0; virtual void add_transaction_data(const crypto::hash& blk_hash, const transaction& tx) = 0;
// tells the subclass to remove data about a transaction // tells the subclass to remove data about a transaction
virtual void remove_transaction_data(const crypto::hash& tx_hash) = 0; virtual void remove_transaction_data(const crypto::hash& tx_hash, const transaction& tx) = 0;
// tells the subclass to store an output // tells the subclass to store an output
virtual void add_output(const crypto::hash& tx_hash, const tx_out& tx_output, const uint64_t& local_index) = 0; virtual void add_output(const crypto::hash& tx_hash, const tx_out& tx_output, const uint64_t& local_index) = 0;