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database.cpp
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database.cpp
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#include <steem/protocol/steem_operations.hpp>
#include <steem/chain/block_summary_object.hpp>
#include <steem/chain/compound.hpp>
#include <steem/chain/custom_operation_interpreter.hpp>
#include <steem/chain/database.hpp>
#include <steem/chain/database_exceptions.hpp>
#include <steem/chain/db_with.hpp>
#include <steem/chain/evaluator_registry.hpp>
#include <steem/chain/global_property_object.hpp>
#include <steem/chain/history_object.hpp>
#include <steem/chain/index.hpp>
#include <steem/chain/smt_objects.hpp>
#include <steem/chain/smt_per_block.hpp>
#include <steem/chain/steem_evaluator.hpp>
#include <steem/chain/steem_objects.hpp>
#include <steem/chain/transaction_object.hpp>
#include <steem/chain/shared_db_merkle.hpp>
#include <steem/chain/operation_notification.hpp>
#include <steem/chain/witness_schedule.hpp>
#include <steem/chain/util/asset.hpp>
#include <steem/chain/util/reward.hpp>
#include <steem/chain/util/uint256.hpp>
#include <steem/chain/util/reward.hpp>
#include <fc/smart_ref_impl.hpp>
#include <fc/uint128.hpp>
#include <fc/container/deque.hpp>
#include <fc/io/fstream.hpp>
#include <cstdint>
#include <deque>
#include <fstream>
#include <functional>
namespace steem { namespace chain {
//namespace db2 = graphene::db2;
struct object_schema_repr
{
std::pair< uint16_t, uint16_t > space_type;
std::string type;
};
struct operation_schema_repr
{
std::string id;
std::string type;
};
struct db_schema
{
std::map< std::string, std::string > types;
std::vector< object_schema_repr > object_types;
std::string operation_type;
std::vector< operation_schema_repr > custom_operation_types;
};
} }
FC_REFLECT( steem::chain::object_schema_repr, (space_type)(type) )
FC_REFLECT( steem::chain::operation_schema_repr, (id)(type) )
FC_REFLECT( steem::chain::db_schema, (types)(object_types)(operation_type)(custom_operation_types) )
namespace steem { namespace chain {
using boost::container::flat_set;
struct reward_fund_context
{
uint128_t recent_claims = 0;
asset reward_balance = asset( 0, STEEM_SYMBOL );
share_type steem_awarded = 0;
};
class database_impl
{
public:
database_impl( database& self );
database& _self;
evaluator_registry< operation > _evaluator_registry;
};
database_impl::database_impl( database& self )
: _self(self), _evaluator_registry(self) {}
database::database()
: _my( new database_impl(*this) ) {}
database::~database()
{
clear_pending();
}
void database::open( const fc::path& data_dir, const fc::path& shared_mem_dir, uint64_t initial_supply, uint64_t shared_file_size, uint32_t chainbase_flags, bool do_validate_invariants )
{
try
{
init_schema();
chainbase::database::open( shared_mem_dir, chainbase_flags, shared_file_size );
initialize_indexes();
initialize_evaluators();
if( !find< dynamic_global_property_object >() )
with_write_lock( [&]()
{
init_genesis( initial_supply );
});
_block_log.open( data_dir / "block_log" );
auto log_head = _block_log.head();
// Rewind all undo state. This should return us to the state at the last irreversible block.
with_write_lock( [&]()
{
undo_all();
FC_ASSERT( revision() == head_block_num(), "Chainbase revision does not match head block num",
("rev", revision())("head_block", head_block_num()) );
if (do_validate_invariants)
validate_invariants();
});
if( head_block_num() )
{
auto head_block = _block_log.read_block_by_num( head_block_num() );
// This assertion should be caught and a reindex should occur
FC_ASSERT( head_block.valid() && head_block->id() == head_block_id(), "Chain state does not match block log. Please reindex blockchain." );
_fork_db.start_block( *head_block );
}
with_read_lock( [&]()
{
init_hardforks(); // Writes to local state, but reads from db
});
}
FC_CAPTURE_LOG_AND_RETHROW( (data_dir)(shared_mem_dir)(shared_file_size) )
}
uint32_t database::reindex( const fc::path& data_dir, const fc::path& shared_mem_dir, uint64_t shared_file_size,
uint32_t stop_replay_at /*=0*/, TBenchmark benchmark /*=TBenchmark(0, [](uint32_t,bool){;})*/)
{
try
{
uint32_t last_block_number = 0; // result
ilog( "Reindexing Blockchain" );
wipe( data_dir, shared_mem_dir, false );
open( data_dir, shared_mem_dir, STEEM_INIT_SUPPLY, shared_file_size );
_fork_db.reset(); // override effect of _fork_db.start_block() call in open()
auto start = fc::time_point::now();
STEEM_ASSERT( _block_log.head(), block_log_exception, "No blocks in block log. Cannot reindex an empty chain." );
ilog( "Replaying blocks..." );
uint64_t skip_flags =
skip_witness_signature |
skip_transaction_signatures |
skip_transaction_dupe_check |
skip_tapos_check |
skip_merkle_check |
skip_witness_schedule_check |
skip_authority_check |
skip_validate | /// no need to validate operations
skip_validate_invariants |
skip_block_log;
with_write_lock( [&]()
{
auto itr = _block_log.read_block( 0 );
auto last_block_num = _block_log.head()->block_num();
if( stop_replay_at > 0 && stop_replay_at < last_block_num )
last_block_num = stop_replay_at;
if( benchmark.first > 0 )
{
benchmark.second( 0, true /*is_initial_call*/ );
}
while( itr.first.block_num() != last_block_num )
{
auto cur_block_num = itr.first.block_num();
if( cur_block_num % 100000 == 0 )
std::cerr << " " << double( cur_block_num * 100 ) / last_block_num << "% " << cur_block_num << " of " << last_block_num <<
" (" << (get_free_memory() / (1024*1024)) << "M free)\n";
apply_block( itr.first, skip_flags );
if( benchmark.first > 0 && cur_block_num % benchmark.first == 0 )
{
benchmark.second( cur_block_num, false /*is_initial_call*/ );
}
itr = _block_log.read_block( itr.second );
}
apply_block( itr.first, skip_flags );
last_block_number = itr.first.block_num();
if( benchmark.first > 0 && last_block_number % benchmark.first == 0 )
{
benchmark.second( last_block_number, false /*is_initial_call*/ );
}
set_revision( head_block_num() );
});
if( _block_log.head()->block_num() )
_fork_db.start_block( *_block_log.head() );
auto end = fc::time_point::now();
ilog( "Done reindexing, elapsed time: ${t} sec", ("t",double((end-start).count())/1000000.0 ) );
return last_block_number;
}
FC_CAPTURE_AND_RETHROW( (data_dir)(shared_mem_dir) )
}
void database::wipe( const fc::path& data_dir, const fc::path& shared_mem_dir, bool include_blocks)
{
close();
chainbase::database::wipe( shared_mem_dir );
if( include_blocks )
{
fc::remove_all( data_dir / "block_log" );
fc::remove_all( data_dir / "block_log.index" );
}
}
void database::close(bool rewind)
{
try
{
// Since pop_block() will move tx's in the popped blocks into pending,
// we have to clear_pending() after we're done popping to get a clean
// DB state (issue #336).
clear_pending();
chainbase::database::flush();
chainbase::database::close();
_block_log.close();
_fork_db.reset();
}
FC_CAPTURE_AND_RETHROW()
}
bool database::is_known_block( const block_id_type& id )const
{ try {
return fetch_block_by_id( id ).valid();
} FC_CAPTURE_AND_RETHROW() }
/**
* Only return true *if* the transaction has not expired or been invalidated. If this
* method is called with a VERY old transaction we will return false, they should
* query things by blocks if they are that old.
*/
bool database::is_known_transaction( const transaction_id_type& id )const
{ try {
const auto& trx_idx = get_index<transaction_index>().indices().get<by_trx_id>();
return trx_idx.find( id ) != trx_idx.end();
} FC_CAPTURE_AND_RETHROW() }
block_id_type database::find_block_id_for_num( uint32_t block_num )const
{
try
{
if( block_num == 0 )
return block_id_type();
// Reversible blocks are *usually* in the TAPOS buffer. Since this
// is the fastest check, we do it first.
block_summary_id_type bsid = block_num & 0xFFFF;
const block_summary_object* bs = find< block_summary_object, by_id >( bsid );
if( bs != nullptr )
{
if( protocol::block_header::num_from_id(bs->block_id) == block_num )
return bs->block_id;
}
// Next we query the block log. Irreversible blocks are here.
auto b = _block_log.read_block_by_num( block_num );
if( b.valid() )
return b->id();
// Finally we query the fork DB.
shared_ptr< fork_item > fitem = _fork_db.fetch_block_on_main_branch_by_number( block_num );
if( fitem )
return fitem->id;
return block_id_type();
}
FC_CAPTURE_AND_RETHROW( (block_num) )
}
block_id_type database::get_block_id_for_num( uint32_t block_num )const
{
block_id_type bid = find_block_id_for_num( block_num );
FC_ASSERT( bid != block_id_type() );
return bid;
}
optional<signed_block> database::fetch_block_by_id( const block_id_type& id )const
{ try {
auto b = _fork_db.fetch_block( id );
if( !b )
{
auto tmp = _block_log.read_block_by_num( protocol::block_header::num_from_id( id ) );
if( tmp && tmp->id() == id )
return tmp;
tmp.reset();
return tmp;
}
return b->data;
} FC_CAPTURE_AND_RETHROW() }
optional<signed_block> database::fetch_block_by_number( uint32_t block_num )const
{ try {
optional< signed_block > b;
auto results = _fork_db.fetch_block_by_number( block_num );
if( results.size() == 1 )
b = results[0]->data;
else
b = _block_log.read_block_by_num( block_num );
return b;
} FC_LOG_AND_RETHROW() }
const signed_transaction database::get_recent_transaction( const transaction_id_type& trx_id ) const
{ try {
auto& index = get_index<transaction_index>().indices().get<by_trx_id>();
auto itr = index.find(trx_id);
FC_ASSERT(itr != index.end());
signed_transaction trx;
fc::raw::unpack( itr->packed_trx, trx );
return trx;;
} FC_CAPTURE_AND_RETHROW() }
std::vector< block_id_type > database::get_block_ids_on_fork( block_id_type head_of_fork ) const
{ try {
pair<fork_database::branch_type, fork_database::branch_type> branches = _fork_db.fetch_branch_from(head_block_id(), head_of_fork);
if( !((branches.first.back()->previous_id() == branches.second.back()->previous_id())) )
{
edump( (head_of_fork)
(head_block_id())
(branches.first.size())
(branches.second.size()) );
assert(branches.first.back()->previous_id() == branches.second.back()->previous_id());
}
std::vector< block_id_type > result;
for( const item_ptr& fork_block : branches.second )
result.emplace_back(fork_block->id);
result.emplace_back(branches.first.back()->previous_id());
return result;
} FC_CAPTURE_AND_RETHROW() }
chain_id_type database::get_chain_id() const
{
return STEEM_CHAIN_ID;
}
const witness_object& database::get_witness( const account_name_type& name ) const
{ try {
return get< witness_object, by_name >( name );
} FC_CAPTURE_AND_RETHROW( (name) ) }
const witness_object* database::find_witness( const account_name_type& name ) const
{
return find< witness_object, by_name >( name );
}
const account_object& database::get_account( const account_name_type& name )const
{ try {
return get< account_object, by_name >( name );
} FC_CAPTURE_AND_RETHROW( (name) ) }
const account_object* database::find_account( const account_name_type& name )const
{
return find< account_object, by_name >( name );
}
const comment_object& database::get_comment( const account_name_type& author, const shared_string& permlink )const
{ try {
return get< comment_object, by_permlink >( boost::make_tuple( author, permlink ) );
} FC_CAPTURE_AND_RETHROW( (author)(permlink) ) }
const comment_object* database::find_comment( const account_name_type& author, const shared_string& permlink )const
{
return find< comment_object, by_permlink >( boost::make_tuple( author, permlink ) );
}
const comment_object& database::get_comment( const account_name_type& author, const string& permlink )const
{ try {
return get< comment_object, by_permlink >( boost::make_tuple( author, permlink) );
} FC_CAPTURE_AND_RETHROW( (author)(permlink) ) }
const comment_object* database::find_comment( const account_name_type& author, const string& permlink )const
{
return find< comment_object, by_permlink >( boost::make_tuple( author, permlink ) );
}
const escrow_object& database::get_escrow( const account_name_type& name, uint32_t escrow_id )const
{ try {
return get< escrow_object, by_from_id >( boost::make_tuple( name, escrow_id ) );
} FC_CAPTURE_AND_RETHROW( (name)(escrow_id) ) }
const escrow_object* database::find_escrow( const account_name_type& name, uint32_t escrow_id )const
{
return find< escrow_object, by_from_id >( boost::make_tuple( name, escrow_id ) );
}
const limit_order_object& database::get_limit_order( const account_name_type& name, uint32_t orderid )const
{ try {
if( !has_hardfork( STEEM_HARDFORK_0_6__127 ) )
orderid = orderid & 0x0000FFFF;
return get< limit_order_object, by_account >( boost::make_tuple( name, orderid ) );
} FC_CAPTURE_AND_RETHROW( (name)(orderid) ) }
const limit_order_object* database::find_limit_order( const account_name_type& name, uint32_t orderid )const
{
if( !has_hardfork( STEEM_HARDFORK_0_6__127 ) )
orderid = orderid & 0x0000FFFF;
return find< limit_order_object, by_account >( boost::make_tuple( name, orderid ) );
}
const savings_withdraw_object& database::get_savings_withdraw( const account_name_type& owner, uint32_t request_id )const
{ try {
return get< savings_withdraw_object, by_from_rid >( boost::make_tuple( owner, request_id ) );
} FC_CAPTURE_AND_RETHROW( (owner)(request_id) ) }
const savings_withdraw_object* database::find_savings_withdraw( const account_name_type& owner, uint32_t request_id )const
{
return find< savings_withdraw_object, by_from_rid >( boost::make_tuple( owner, request_id ) );
}
const dynamic_global_property_object&database::get_dynamic_global_properties() const
{ try {
return get< dynamic_global_property_object >();
} FC_CAPTURE_AND_RETHROW() }
const node_property_object& database::get_node_properties() const
{
return _node_property_object;
}
const feed_history_object& database::get_feed_history()const
{ try {
return get< feed_history_object >();
} FC_CAPTURE_AND_RETHROW() }
const witness_schedule_object& database::get_witness_schedule_object()const
{ try {
return get< witness_schedule_object >();
} FC_CAPTURE_AND_RETHROW() }
const hardfork_property_object& database::get_hardfork_property_object()const
{ try {
return get< hardfork_property_object >();
} FC_CAPTURE_AND_RETHROW() }
const time_point_sec database::calculate_discussion_payout_time( const comment_object& comment )const
{
if( has_hardfork( STEEM_HARDFORK_0_17__769 ) || comment.parent_author == STEEM_ROOT_POST_PARENT )
return comment.cashout_time;
else
return get< comment_object >( comment.root_comment ).cashout_time;
}
const reward_fund_object& database::get_reward_fund( const comment_object& c ) const
{
return get< reward_fund_object, by_name >( STEEM_POST_REWARD_FUND_NAME );
}
void database::pay_fee( const account_object& account, asset fee )
{
FC_ASSERT( fee.amount >= 0 ); /// NOTE if this fails then validate() on some operation is probably wrong
if( fee.amount == 0 )
return;
FC_ASSERT( account.balance >= fee );
adjust_balance( account, -fee );
adjust_supply( -fee );
}
uint32_t database::witness_participation_rate()const
{
const dynamic_global_property_object& dpo = get_dynamic_global_properties();
return uint64_t(STEEM_100_PERCENT) * dpo.recent_slots_filled.popcount() / 128;
}
void database::add_checkpoints( const flat_map< uint32_t, block_id_type >& checkpts )
{
for( const auto& i : checkpts )
_checkpoints[i.first] = i.second;
}
bool database::before_last_checkpoint()const
{
return (_checkpoints.size() > 0) && (_checkpoints.rbegin()->first >= head_block_num());
}
/**
* Push block "may fail" in which case every partial change is unwound. After
* push block is successful the block is appended to the chain database on disk.
*
* @return true if we switched forks as a result of this push.
*/
bool database::push_block(const signed_block& new_block, uint32_t skip)
{
//fc::time_point begin_time = fc::time_point::now();
bool result;
detail::with_skip_flags( *this, skip, [&]()
{
with_write_lock( [&]()
{
detail::without_pending_transactions( *this, std::move(_pending_tx), [&]()
{
try
{
result = _push_block(new_block);
}
FC_CAPTURE_AND_RETHROW( (new_block) )
});
});
});
//fc::time_point end_time = fc::time_point::now();
//fc::microseconds dt = end_time - begin_time;
//if( ( new_block.block_num() % 10000 ) == 0 )
// ilog( "push_block ${b} took ${t} microseconds", ("b", new_block.block_num())("t", dt.count()) );
return result;
}
void database::_maybe_warn_multiple_production( uint32_t height )const
{
auto blocks = _fork_db.fetch_block_by_number( height );
if( blocks.size() > 1 )
{
vector< std::pair< account_name_type, fc::time_point_sec > > witness_time_pairs;
for( const auto& b : blocks )
{
witness_time_pairs.push_back( std::make_pair( b->data.witness, b->data.timestamp ) );
}
ilog( "Encountered block num collision at block ${n} due to a fork, witnesses are: ${w}", ("n", height)("w", witness_time_pairs) );
}
return;
}
bool database::_push_block(const signed_block& new_block)
{ try {
uint32_t skip = get_node_properties().skip_flags;
//uint32_t skip_undo_db = skip & skip_undo_block;
if( !(skip&skip_fork_db) )
{
shared_ptr<fork_item> new_head = _fork_db.push_block(new_block);
_maybe_warn_multiple_production( new_head->num );
//If the head block from the longest chain does not build off of the current head, we need to switch forks.
if( new_head->data.previous != head_block_id() )
{
//If the newly pushed block is the same height as head, we get head back in new_head
//Only switch forks if new_head is actually higher than head
if( new_head->data.block_num() > head_block_num() )
{
// wlog( "Switching to fork: ${id}", ("id",new_head->data.id()) );
auto branches = _fork_db.fetch_branch_from(new_head->data.id(), head_block_id());
// pop blocks until we hit the forked block
while( head_block_id() != branches.second.back()->data.previous )
pop_block();
// push all blocks on the new fork
for( auto ritr = branches.first.rbegin(); ritr != branches.first.rend(); ++ritr )
{
// ilog( "pushing blocks from fork ${n} ${id}", ("n",(*ritr)->data.block_num())("id",(*ritr)->data.id()) );
optional<fc::exception> except;
try
{
auto session = start_undo_session( true );
apply_block( (*ritr)->data, skip );
session.push();
}
catch ( const fc::exception& e ) { except = e; }
if( except )
{
// wlog( "exception thrown while switching forks ${e}", ("e",except->to_detail_string() ) );
// remove the rest of branches.first from the fork_db, those blocks are invalid
while( ritr != branches.first.rend() )
{
_fork_db.remove( (*ritr)->data.id() );
++ritr;
}
_fork_db.set_head( branches.second.front() );
// pop all blocks from the bad fork
while( head_block_id() != branches.second.back()->data.previous )
pop_block();
// restore all blocks from the good fork
for( auto ritr = branches.second.rbegin(); ritr != branches.second.rend(); ++ritr )
{
auto session = start_undo_session( true );
apply_block( (*ritr)->data, skip );
session.push();
}
throw *except;
}
}
return true;
}
else
return false;
}
}
try
{
auto session = start_undo_session( true );
apply_block(new_block, skip);
session.push();
}
catch( const fc::exception& e )
{
elog("Failed to push new block:\n${e}", ("e", e.to_detail_string()));
_fork_db.remove(new_block.id());
throw;
}
return false;
} FC_CAPTURE_AND_RETHROW() }
/**
* Attempts to push the transaction into the pending queue
*
* When called to push a locally generated transaction, set the skip_block_size_check bit on the skip argument. This
* will allow the transaction to be pushed even if it causes the pending block size to exceed the maximum block size.
* Although the transaction will probably not propagate further now, as the peers are likely to have their pending
* queues full as well, it will be kept in the queue to be propagated later when a new block flushes out the pending
* queues.
*/
void database::push_transaction( const signed_transaction& trx, uint32_t skip )
{
try
{
try
{
FC_ASSERT( fc::raw::pack_size(trx) <= (get_dynamic_global_properties().maximum_block_size - 256) );
set_producing( true );
detail::with_skip_flags( *this, skip,
[&]()
{
with_write_lock( [&]()
{
_push_transaction( trx );
});
});
set_producing( false );
}
catch( ... )
{
set_producing( false );
throw;
}
}
FC_CAPTURE_AND_RETHROW( (trx) )
}
void database::_push_transaction( const signed_transaction& trx )
{
// If this is the first transaction pushed after applying a block, start a new undo session.
// This allows us to quickly rewind to the clean state of the head block, in case a new block arrives.
if( !_pending_tx_session.valid() )
_pending_tx_session = start_undo_session( true );
// Create a temporary undo session as a child of _pending_tx_session.
// The temporary session will be discarded by the destructor if
// _apply_transaction fails. If we make it to merge(), we
// apply the changes.
auto temp_session = start_undo_session( true );
_apply_transaction( trx );
_pending_tx.push_back( trx );
notify_changed_objects();
// The transaction applied successfully. Merge its changes into the pending block session.
temp_session.squash();
// notify anyone listening to pending transactions
notify_on_pending_transaction( trx );
}
signed_block database::generate_block(
fc::time_point_sec when,
const account_name_type& witness_owner,
const fc::ecc::private_key& block_signing_private_key,
uint32_t skip /* = 0 */
)
{
signed_block result;
detail::with_skip_flags( *this, skip, [&]()
{
try
{
result = _generate_block( when, witness_owner, block_signing_private_key );
}
FC_CAPTURE_AND_RETHROW( (witness_owner) )
});
return result;
}
signed_block database::_generate_block(
fc::time_point_sec when,
const account_name_type& witness_owner,
const fc::ecc::private_key& block_signing_private_key
)
{
uint32_t skip = get_node_properties().skip_flags;
uint32_t slot_num = get_slot_at_time( when );
FC_ASSERT( slot_num > 0 );
string scheduled_witness = get_scheduled_witness( slot_num );
FC_ASSERT( scheduled_witness == witness_owner );
const auto& witness_obj = get_witness( witness_owner );
if( !(skip & skip_witness_signature) )
FC_ASSERT( witness_obj.signing_key == block_signing_private_key.get_public_key() );
static const size_t max_block_header_size = fc::raw::pack_size( signed_block_header() ) + 4;
auto maximum_block_size = get_dynamic_global_properties().maximum_block_size; //STEEM_MAX_BLOCK_SIZE;
size_t total_block_size = max_block_header_size;
signed_block pending_block;
with_write_lock( [&]()
{
//
// The following code throws away existing pending_tx_session and
// rebuilds it by re-applying pending transactions.
//
// This rebuild is necessary because pending transactions' validity
// and semantics may have changed since they were received, because
// time-based semantics are evaluated based on the current block
// time. These changes can only be reflected in the database when
// the value of the "when" variable is known, which means we need to
// re-apply pending transactions in this method.
//
_pending_tx_session.reset();
_pending_tx_session = start_undo_session( true );
uint64_t postponed_tx_count = 0;
// pop pending state (reset to head block state)
for( const signed_transaction& tx : _pending_tx )
{
// Only include transactions that have not expired yet for currently generating block,
// this should clear problem transactions and allow block production to continue
if( tx.expiration < when )
continue;
uint64_t new_total_size = total_block_size + fc::raw::pack_size( tx );
// postpone transaction if it would make block too big
if( new_total_size >= maximum_block_size )
{
postponed_tx_count++;
continue;
}
try
{
auto temp_session = start_undo_session( true );
_apply_transaction( tx );
temp_session.squash();
total_block_size += fc::raw::pack_size( tx );
pending_block.transactions.push_back( tx );
}
catch ( const fc::exception& e )
{
// Do nothing, transaction will not be re-applied
//wlog( "Transaction was not processed while generating block due to ${e}", ("e", e) );
//wlog( "The transaction was ${t}", ("t", tx) );
}
}
if( postponed_tx_count > 0 )
{
wlog( "Postponed ${n} transactions due to block size limit", ("n", postponed_tx_count) );
}
_pending_tx_session.reset();
});
// We have temporarily broken the invariant that
// _pending_tx_session is the result of applying _pending_tx, as
// _pending_tx now consists of the set of postponed transactions.
// However, the push_block() call below will re-create the
// _pending_tx_session.
pending_block.previous = head_block_id();
pending_block.timestamp = when;
pending_block.transaction_merkle_root = pending_block.calculate_merkle_root();
pending_block.witness = witness_owner;
if( has_hardfork( STEEM_HARDFORK_0_5__54 ) )
{
const auto& witness = get_witness( witness_owner );
if( witness.running_version != STEEM_BLOCKCHAIN_VERSION )
pending_block.extensions.insert( block_header_extensions( STEEM_BLOCKCHAIN_VERSION ) );
const auto& hfp = get_hardfork_property_object();
if( hfp.current_hardfork_version < STEEM_BLOCKCHAIN_VERSION // Binary is newer hardfork than has been applied
&& ( witness.hardfork_version_vote != _hardfork_versions[ hfp.last_hardfork + 1 ] || witness.hardfork_time_vote != _hardfork_times[ hfp.last_hardfork + 1 ] ) ) // Witness vote does not match binary configuration
{
// Make vote match binary configuration
pending_block.extensions.insert( block_header_extensions( hardfork_version_vote( _hardfork_versions[ hfp.last_hardfork + 1 ], _hardfork_times[ hfp.last_hardfork + 1 ] ) ) );
}
else if( hfp.current_hardfork_version == STEEM_BLOCKCHAIN_VERSION // Binary does not know of a new hardfork
&& witness.hardfork_version_vote > STEEM_BLOCKCHAIN_VERSION ) // Voting for hardfork in the future, that we do not know of...
{
// Make vote match binary configuration. This is vote to not apply the new hardfork.
pending_block.extensions.insert( block_header_extensions( hardfork_version_vote( _hardfork_versions[ hfp.last_hardfork ], _hardfork_times[ hfp.last_hardfork ] ) ) );
}
}
if( !(skip & skip_witness_signature) )
pending_block.sign( block_signing_private_key );
// TODO: Move this to _push_block() so session is restored.
if( !(skip & skip_block_size_check) )
{
FC_ASSERT( fc::raw::pack_size(pending_block) <= STEEM_MAX_BLOCK_SIZE );
}
push_block( pending_block, skip );
return pending_block;
}
/**
* Removes the most recent block from the database and
* undoes any changes it made.
*/
void database::pop_block()
{
try
{
_pending_tx_session.reset();
auto head_id = head_block_id();
/// save the head block so we can recover its transactions
optional<signed_block> head_block = fetch_block_by_id( head_id );
STEEM_ASSERT( head_block.valid(), pop_empty_chain, "there are no blocks to pop" );
_fork_db.pop_block();
undo();
_popped_tx.insert( _popped_tx.begin(), head_block->transactions.begin(), head_block->transactions.end() );
}
FC_CAPTURE_AND_RETHROW()
}
void database::clear_pending()
{
try
{
assert( (_pending_tx.size() == 0) || _pending_tx_session.valid() );
_pending_tx.clear();
_pending_tx_session.reset();
}
FC_CAPTURE_AND_RETHROW()
}
void database::notify_pre_apply_operation( operation_notification& note )
{
note.trx_id = _current_trx_id;
note.block = _current_block_num;
note.trx_in_block = _current_trx_in_block;
note.op_in_trx = _current_op_in_trx;
STEEM_TRY_NOTIFY( pre_apply_operation, note )
}
void database::notify_post_apply_operation( const operation_notification& note )
{
STEEM_TRY_NOTIFY( post_apply_operation, note )
}
inline const void database::push_virtual_operation( const operation& op, bool force )
{
if( !force )
{
#if defined( IS_LOW_MEM ) && ! defined( IS_TEST_NET )
return;
#endif
}
FC_ASSERT( is_virtual_operation( op ) );
operation_notification note(op);
notify_pre_apply_operation( note );
notify_post_apply_operation( note );
}
void database::notify_applied_block( const signed_block& block )
{
STEEM_TRY_NOTIFY( applied_block, block )
}
void database::notify_on_pending_transaction( const signed_transaction& tx )
{
STEEM_TRY_NOTIFY( on_pending_transaction, tx )
}
void database::notify_on_pre_apply_transaction( const signed_transaction& tx )
{
STEEM_TRY_NOTIFY( on_pre_apply_transaction, tx )
}
void database::notify_on_applied_transaction( const signed_transaction& tx )
{
STEEM_TRY_NOTIFY( on_applied_transaction, tx )
}
account_name_type database::get_scheduled_witness( uint32_t slot_num )const
{
const dynamic_global_property_object& dpo = get_dynamic_global_properties();
const witness_schedule_object& wso = get_witness_schedule_object();
uint64_t current_aslot = dpo.current_aslot + slot_num;
return wso.current_shuffled_witnesses[ current_aslot % wso.num_scheduled_witnesses ];
}
fc::time_point_sec database::get_slot_time(uint32_t slot_num)const
{
if( slot_num == 0 )
return fc::time_point_sec();
auto interval = STEEM_BLOCK_INTERVAL;
const dynamic_global_property_object& dpo = get_dynamic_global_properties();
if( head_block_num() == 0 )
{
// n.b. first block is at genesis_time plus one block interval
fc::time_point_sec genesis_time = dpo.time;
return genesis_time + slot_num * interval;
}
int64_t head_block_abs_slot = head_block_time().sec_since_epoch() / interval;
fc::time_point_sec head_slot_time( head_block_abs_slot * interval );
// "slot 0" is head_slot_time
// "slot 1" is head_slot_time,
// plus maint interval if head block is a maint block
// plus block interval if head block is not a maint block
return head_slot_time + (slot_num * interval);
}
uint32_t database::get_slot_at_time(fc::time_point_sec when)const
{
fc::time_point_sec first_slot_time = get_slot_time( 1 );
if( when < first_slot_time )
return 0;
return (when - first_slot_time).to_seconds() / STEEM_BLOCK_INTERVAL + 1;
}
/**
* Converts STEEM into sbd and adds it to to_account while reducing the STEEM supply
* by STEEM and increasing the sbd supply by the specified amount.
*/
std::pair< asset, asset > database::create_sbd( const account_object& to_account, asset steem, bool to_reward_balance )
{
std::pair< asset, asset > assets( asset( 0, SBD_SYMBOL ), asset( 0, STEEM_SYMBOL ) );
try
{
if( steem.amount == 0 )
return assets;
const auto& median_price = get_feed_history().current_median_history;
const auto& gpo = get_dynamic_global_properties();
if( !median_price.is_null() )
{
auto to_sbd = ( gpo.sbd_print_rate * steem.amount ) / STEEM_100_PERCENT;
auto to_steem = steem.amount - to_sbd;