void BlockInfo::populateFromParent(BlockInfo const& _parent)
{
m_stateRoot = _parent.stateRoot();
m_number = _parent.m_number + 1;
m_parentHash = _parent.m_hash;
m_gasLimit = _parent.childGasLimit();
m_gasUsed = 0;
m_difficulty = calculateDifficulty(_parent);
}
bool Block::sync(BlockChain const& _bc, h256 const& _block, BlockInfo const& _bi)
{
bool ret = false;
// BLOCK
BlockInfo bi = _bi ? _bi : _bc.info(_block);
#if ETH_PARANOIA
if (!bi)
while (1)
{
try
{
auto b = _bc.block(_block);
bi.populate(b);
break;
}
catch (Exception const& _e)
{
// TODO: Slightly nicer handling? :-)
cerr << "ERROR: Corrupt block-chain! Delete your block-chain DB and restart." << endl;
cerr << diagnostic_information(_e) << endl;
}
catch (std::exception const& _e)
{
// TODO: Slightly nicer handling? :-)
cerr << "ERROR: Corrupt block-chain! Delete your block-chain DB and restart." << endl;
cerr << _e.what() << endl;
}
}
#endif
if (bi == m_currentBlock)
{
// We mined the last block.
// Our state is good - we just need to move on to next.
m_previousBlock = m_currentBlock;
resetCurrent();
ret = true;
}
else if (bi == m_previousBlock)
{
// No change since last sync.
// Carry on as we were.
}
else
{
// New blocks available, or we've switched to a different branch. All change.
// Find most recent state dump and replay what's left.
// (Most recent state dump might end up being genesis.)
if (m_state.db().lookup(bi.stateRoot()).empty()) // TODO: API in State for this?
{
cwarn << "Unable to sync to" << bi.hash() << "; state root" << bi.stateRoot() << "not found in database.";
cwarn << "Database corrupt: contains block without stateRoot:" << bi;
cwarn << "Try rescuing the database by running: eth --rescue";
BOOST_THROW_EXCEPTION(InvalidStateRoot() << errinfo_target(bi.stateRoot()));
}
m_previousBlock = bi;
resetCurrent();
ret = true;
}
#if ALLOW_REBUILD
else
{
