static const uint64_t quick_height = m_nettype == TESTNET ? 801219 : m_nettype == MAINNET ? 1220516 : 0;
    if (block_sync_size > 0)
      return block_sync_size;
    if (height >= quick_height)
      return BLOCKS_SYNCHRONIZING_DEFAULT_COUNT;
    return BLOCKS_SYNCHRONIZING_DEFAULT_COUNT_PRE_V4