class ByzantiumConfig extends Eip160HFConfig {

    protected int getExplosion(BlockHeader curBlock, BlockHeader parent) {
        int periodCount = (int) (Math.max(0, curBlock.getNumber() - 3_000_000) / getConstants().getEXP_DIFFICULTY_PERIOD());
        return periodCount - 2;
    }

    public  ByzantiumConfig(BlockchainConfig parent);

}