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metamask-extension/ui/hooks/useEthFiatAmount.js
Mark Stacey 3732c5f71e
Add JSDoc ESLint rules (#12112)
ESLint rules have been added to enforce our JSDoc conventions. These
rules were introduced by updating `@metamask/eslint-config` to v9.

Some of the rules have been disabled because the effort to fix all lint
errors was too high. It might be easiest to enable these rules one
directory at a time, or one rule at a time.

Most of the changes in this PR were a result of running
`yarn lint:fix`. There were a handful of manual changes that seemed
obvious and simple to make. Anything beyond that and the rule was left
disabled.
2022-01-07 12:27:33 -03:30

48 lines
1.8 KiB
JavaScript

import { useMemo } from 'react';
import { useSelector } from 'react-redux';
import { getCurrentCurrency, getShouldShowFiat } from '../selectors';
import { decEthToConvertedCurrency } from '../helpers/utils/conversions.util';
import { formatCurrency } from '../helpers/utils/confirm-tx.util';
import { getConversionRate } from '../ducks/metamask/metamask';
/**
* Get an Eth amount converted to fiat and formatted for display
*
* @param {string} [ethAmount] - The eth amount to convert
* @param {Object} [overrides] - A configuration object that allows the called to explicitly
* ensure fiat is shown even if the property is not set in state.
* @param {boolean} [overrides.showFiat] - If truthy, ensures the fiat value is shown even if the showFiat value from state is falsey
* @param {boolean} hideCurrencySymbol - Indicates whether the returned formatted amount should include the trailing currency symbol
* @returns {string} The formatted token amount in the user's chosen fiat currency
*/
export function useEthFiatAmount(
ethAmount,
overrides = {},
hideCurrencySymbol,
) {
const conversionRate = useSelector(getConversionRate);
const currentCurrency = useSelector(getCurrentCurrency);
const userPrefersShownFiat = useSelector(getShouldShowFiat);
const showFiat = overrides.showFiat ?? userPrefersShownFiat;
const formattedFiat = useMemo(
() => decEthToConvertedCurrency(ethAmount, currentCurrency, conversionRate),
[conversionRate, currentCurrency, ethAmount],
);
if (
!showFiat ||
currentCurrency.toUpperCase() === 'ETH' ||
conversionRate <= 0 ||
ethAmount === undefined
) {
return undefined;
}
return hideCurrencySymbol
? formatCurrency(formattedFiat, currentCurrency)
: `${formatCurrency(
formattedFiat,
currentCurrency,
)} ${currentCurrency.toUpperCase()}`;
}