How to use the currency-formatter/currencies.map function in currency-formatter

import currencies from 'currency-formatter/currencies';
import escapeStringRegexp from 'escape-string-regexp';
import PropTypes from 'prop-types';
import React, { Component } from 'react';
import Button from 'grommet/components/Button';
import Footer from 'grommet/components/Footer';
import Form from 'grommet/components/Form';
import FormField from 'grommet/components/FormField';
import FormFields from 'grommet/components/FormFields';
import Header from 'grommet/components/Header';
import Heading from 'grommet/components/Heading';
import NumberInput from 'grommet/components/NumberInput';
import Select from 'grommet/components/Select';
import TextInput from 'grommet/components/TextInput';

const currencyList = currencies.map(currency => ({
  value: currency.code,
  label: `${currency.code} (${currency.symbol})`,
}));

class WalletAdd extends Component {
  static propTypes = {
    onAdd: PropTypes.func,
  }

  static defaultProps = {
    onAdd: () => {},
  }

  constructor(props) {
    super(props);