code: function addPeer (commandOptions, { address, peerKey }) {
    return command(
      commandOptions,
      txHelper.addCommand(
        txHelper.emptyTransaction(),
        'addPeer',
        {
          peer: {
            address,
            peerKey
          }
        }
      )
    )
  }
docs: addPeer
  @param {Object} commandOptions
  @param {Object} args
  @property {String} args.address
  @property {String} args.peerKey
  @link https://iroha.readthedocs.io/en/latest/api/commands.html#add-peer