void EthashSealEngine::generateSeal(BlockInfo const& _bi)
{
m_sealing = Ethash::BlockHeader(_bi);
m_farm.setWork(m_sealing);
m_farm.start(m_sealer);
m_farm.setWork(m_sealing); // TODO: take out one before or one after...
bytes shouldPrecompute = option("precomputeDAG");
if (!shouldPrecompute.empty() && shouldPrecompute[0] == 1)
Ethash::ensurePrecomputed((unsigned)_bi.number());
}
u256 BlockInfo::calculateDifficulty(BlockInfo const& _parent) const
{
const unsigned c_expDiffPeriod = 100000;
if (!m_number)
throw GenesisBlockCannotBeCalculated();
u256 o = max<u256>(c_minimumDifficulty, m_timestamp >= _parent.m_timestamp + c_durationLimit ? _parent.m_difficulty - (_parent.m_difficulty / c_difficultyBoundDivisor) : (_parent.m_difficulty + (_parent.m_difficulty / c_difficultyBoundDivisor)));
unsigned periodCount = unsigned(_parent.number() + 1) / c_expDiffPeriod;
if (periodCount > 1)
o = max<u256>(c_minimumDifficulty, o + (u256(1) << (periodCount - 2))); // latter will eventually become huge, so ensure it's a bigint.
return o;
}
static void badBlockInfo(BlockInfo const& _bi, string const& _err)
{
string const c_line = EthReset EthOnMaroon + string(80, ' ') + EthReset;
string const c_border = EthReset EthOnMaroon + string(2, ' ') + EthReset EthMaroonBold;
string const c_space = c_border + string(76, ' ') + c_border + EthReset;
stringstream ss;
ss << c_line << endl;
ss << c_space << endl;
ss << c_border + " Import Failure " + _err + string(max<int>(0, 53 - _err.size()), ' ') + " " + c_border << endl;
ss << c_space << endl;
string bin = toString(_bi.number());
ss << c_border + (" Guru Meditation #" + string(max<int>(0, 8 - bin.size()), '0') + bin + "." + _bi.hash().abridged() + " ") + c_border << endl;
ss << c_space << endl;
ss << c_line;
cwarn << "\n" + ss.str();
}
uint64_t EthashAux::cacheSize(BlockInfo const& _header)
{
return ethash_get_cachesize((uint64_t)_header.number());
}
