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 {