code: function createAsset (commandOptions, { assetName, domainId, precision }) {
    return command(
      commandOptions,
      txHelper.addCommand(
        txHelper.emptyTransaction(),
        'createAsset',
        {
          assetName,
          domainId,
          precision
        }
      )
    )
  }
docs: createAsset
  @param {Object} commandOptions
  @param {Object} args
  @property {String} args.assetName
  @property {String} args.domainId
  @property {Number} args.precision
  @link https://iroha.readthedocs.io/en/latest/api/commands.html#create-asset