text: // Copyright © 2020 The Things Network Foundation, The Things Industries B.V.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  /**
   * Converts hex encoded string to base64.
   *
   * @param {string} str - Hex encoded string.
   * @returns {string} - `str` base64 encoded.
   */
  export const hexToBase64 = str => {
    return btoa(
      String.fromCharCode.apply(
        null,
        str
          .replace(/\r|\n/g, '')
          .replace(/([\da-fA-F]{2}) ?/g, '0x$1 ')
          .replace(/ +$/, '')
          .split(' '),
      ),
    )
  }
  
  /**
   * Converts base64 encoded string to hex.
   *
   * @param {string} str - Base64 encoded string.
   * @returns {string} - `str` hex encoded.
   */
  export const base64ToHex = str => {
    return Array.from(atob(str.replace(/[ \r\n]+$/, '')))
      .map(char => {
        const tmp = char.charCodeAt(0).toString(16)
  
        return tmp.length > 1 ? tmp : `0${tmp}`
      })
      .join('')
  }
  