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metamask-extension/ui/hooks/useUserPreferencedCurrency.js
Alex Donesky a4a5580785
Update controllers with conversionRate change with minimal required changes in extension (#11361)
* updating controllers with conversionRate change with minimal required changes in extension

* swapping showFiat selector in places where possible

* adding invalid conversion protection

* lint fixes

* adjusting list-item styling logic
2021-06-23 18:28:49 -05:00

64 lines
2.4 KiB
JavaScript

import { useSelector } from 'react-redux';
import {
getPreferences,
getShouldShowFiat,
getCurrentCurrency,
} from '../selectors';
import { getNativeCurrency } from '../ducks/metamask/metamask';
import { PRIMARY, SECONDARY, ETH } from '../helpers/constants/common';
/**
* Defines the shape of the options parameter for useUserPreferencedCurrency
* @typedef {Object} UseUserPreferencedCurrencyOptions
* @property {number} [numberOfDecimals] - Number of significant decimals to display
* @property {number} [ethNumberOfDecimals] - Number of significant decimals to display
* when using ETH
* @property {number} [fiatNumberOfDecimals] - Number of significant decimals to display
* when using fiat
*/
/**
* Defines the return shape of useUserPreferencedCurrency
* @typedef {Object} UserPreferredCurrency
* @property {string} currency - the currency type to use (eg: 'ETH', 'usd')
* @property {number} numberOfDecimals - Number of significant decimals to display
*/
/**
* useUserPreferencedCurrency
*
* returns an object that contains what currency to use for displaying values based
* on the user's preference settings, as well as the significant number of decimals
* to display based on the currency
* @param {"PRIMARY" | "SECONDARY"} type - what display type is being rendered
* @param {UseUserPreferencedCurrencyOptions} opts - options to override default values
* @return {UserPreferredCurrency}
*/
export function useUserPreferencedCurrency(type, opts = {}) {
const nativeCurrency = useSelector(getNativeCurrency);
const { useNativeCurrencyAsPrimaryCurrency } = useSelector(getPreferences);
const showFiat = useSelector(getShouldShowFiat);
const currentCurrency = useSelector(getCurrentCurrency);
let currency, numberOfDecimals;
if (
!showFiat ||
(type === PRIMARY && useNativeCurrencyAsPrimaryCurrency) ||
(type === SECONDARY && !useNativeCurrencyAsPrimaryCurrency)
) {
// Display ETH
currency = nativeCurrency || ETH;
numberOfDecimals = opts.numberOfDecimals || opts.ethNumberOfDecimals || 6;
} else if (
(type === SECONDARY && useNativeCurrencyAsPrimaryCurrency) ||
(type === PRIMARY && !useNativeCurrencyAsPrimaryCurrency)
) {
// Display Fiat
currency = currentCurrency;
numberOfDecimals = opts.numberOfDecimals || opts.fiatNumberOfDecimals || 2;
}
return { currency, numberOfDecimals };
}