metamask-extension/ui/components/app/user-preferenced-token-input/user-preferenced-token-input.component.js

import React, { PureComponent } from 'react';
import PropTypes from 'prop-types';
import TokenInput from '../../ui/token-input';

export default class UserPreferencedTokenInput extends PureComponent {
  static propTypes = {
    token: PropTypes.shape({
      address: PropTypes.string.isRequired,
      decimals: PropTypes.number,
      symbol: PropTypes.string,
    }).isRequired,
    useNativeCurrencyAsPrimaryCurrency: PropTypes.bool,
  };

  render() {
    const { useNativeCurrencyAsPrimaryCurrency, ...restProps } = this.props;

    return (
      <TokenInput
        {...restProps}
        showFiat={!useNativeCurrencyAsPrimaryCurrency}
      />
    );
  }
}