How to use

getConstants

method

in

org.ethereum.config.BlockchainConfig

@Override
public Constants getCommonConstants() {
  // TODO make a guard wrapper which throws exception if the requested constant differs among configs
  return configs[0].getConstants();
}

public Eip160HFConfig(BlockchainConfig parent) {
  super(parent);
  constants = new ConstantsAdapter(parent.getConstants()) {
    @Override
    public int getMAX_CONTRACT_SZIE() {
      return 0x6000;
    }
  };
}

@Override
public Constants getConstants() {
  return parent.getConstants();
}

public boolean isContractExist(BlockchainConfig blockchainConfig) {
  return !FastByteComparisons.equal(codeHash, EMPTY_DATA_HASH) ||
      !blockchainConfig.getConstants().getInitialNonce().equals(nonce);
}

protected void initDaoConfig(BlockchainConfig parent, long forkBlockNumber) {
  this.parent = parent;
  this.constants = parent.getConstants();
  this.forkBlockNumber = forkBlockNumber;
  BlockHeaderRule rule = new ExtraDataPresenceRule(DAO_EXTRA_DATA, supportFork);
  headerValidators().add(Pair.of(forkBlockNumber, new BlockHeaderValidator(rule)));
}

BigInteger blockReward = config.getBlockchainConfig().getConfigForBlock(block.getNumber()).getConstants().getBLOCK_REWARD();
BigInteger inclusionReward = blockReward.divide(BigInteger.valueOf(32));

if (m_endGas.compareTo(BigInteger.valueOf(returnDataGasValue)) < 0) {
  if (!blockchainConfig.getConstants().createEmptyContractOnOOG()) {
    program.setRuntimeFailure(Program.Exception.notEnoughSpendingGas("No gas to return just created contract",
        returnDataGasValue, program));
} else if (getLength(result.getHReturn()) > blockchainConfig.getConstants().getMAX_CONTRACT_SZIE()) {

@Test
public void testConstantinopleBlock() {
  final int byzStart = 50;
  final int cnstStart = 60;
  GenesisConfig genesisConfig = new GenesisConfig();
  genesisConfig.constantinopleBlock = cnstStart;
  JsonNetConfig config = new JsonNetConfig(genesisConfig);
  assertBlockchainConfigExistsAt(config, cnstStart, ConstantinopleConfig.class);
  BlockchainConfig blockchainConfig = config.getConfigForBlock(cnstStart);
  assertEquals("Default chainId must be '1'", new Integer(1), blockchainConfig.getChainId());
  assertEquals("Reward should be 2 ETH", EtherUtil.convert(2, EtherUtil.Unit.ETHER), blockchainConfig.getConstants().getBLOCK_REWARD());
  assertTrue("EIP-1014 skinny CREATE2 should be activated among others", blockchainConfig.eip1014());
  genesisConfig.chainId = 99;
  config = new JsonNetConfig(genesisConfig);
  blockchainConfig = config.getConfigForBlock(cnstStart);
  assertEquals("chainId should be copied from genesis config", new Integer(99), blockchainConfig.getChainId());
  assertEquals("Default Frontier reward is 5 ETH", EtherUtil.convert(5, EtherUtil.Unit.ETHER),
      config.getConfigForBlock(byzStart).getConstants().getBLOCK_REWARD());
  genesisConfig.byzantiumBlock = byzStart;
  config = new JsonNetConfig(genesisConfig);  // Respawn so we have Byzantium on byzStart instead of Frontier
  assertEquals("Reward should be 3 ETH in Byzantium", EtherUtil.convert(3, EtherUtil.Unit.ETHER),
      config.getConfigForBlock(byzStart).getConstants().getBLOCK_REWARD());
  assertEquals("Reward should be changed to 2 ETH in Constantinople", EtherUtil.convert(2, EtherUtil.Unit.ETHER),
      config.getConfigForBlock(cnstStart).getConstants().getBLOCK_REWARD());
}

long afterSpend = programInvoke.getGas().longValue() - storageCost - result.getGasUsed();
if (afterSpend < 0) {
  if (!blockchainConfig.getConstants().createEmptyContractOnOOG()) {
    result.setException(Program.Exception.notEnoughSpendingGas("No gas to return just created contract",
        storageCost, this));
    track.saveCode(newAddress, EMPTY_BYTE_ARRAY);
} else if (getLength(code) > blockchainConfig.getConstants().getMAX_CONTRACT_SZIE()) {
  result.setException(Program.Exception.notEnoughSpendingGas("Contract size too large: " + getLength(result.getHReturn()),
      storageCost, this));