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metamask-extension/ui/app/hooks/useTokenFiatAmount.js
Mark Stacey 14d85b1332
Make JSDoc formatting more consistent (#9796)
A few inconsistencies in JSDoc formatting have been fixed throughout
the project. Many issues remain; these were just the few things that
were easy to fix with a regular expression.

The changes include:

* Using lower-case for primitive types, but capitalizing non-primitive
 types
* Separating the parameter identifier and the description with a dash
* Omitting a dash between the return type and the return description
* Ensuring the parameter type is first and the identifier is second (in
 a few places it was backwards)
* Using square brackets to denote when a parameter is optional, rather
 than putting "(optional)" in the parameter description
* Including a type and identifier with every parameter
* Fixing inconsistent spacing, except where it's used for alignment
* Remove incorrectly formatted `@deprecated` tags that reference non-
 existent properties
* Remove lone comment block without accompanying function

Additionally, one parameter was renamed for clarity.
2020-11-10 14:00:41 -03:30

65 lines
2.2 KiB
JavaScript

import { useMemo } from 'react'
import { useSelector } from 'react-redux'
import {
getTokenExchangeRates,
getConversionRate,
getCurrentCurrency,
getShouldShowFiat,
} from '../selectors'
import { getTokenFiatAmount } from '../helpers/utils/token-util'
/**
* Get the token balance converted to fiat and formatted for display
*
* @param {string} [tokenAddress] - The token address
* @param {string} [tokenAmount] - The token balance
* @param {string} [tokenSymbol] - The token symbol
* @param {Object} [overrides] - A configuration object that allows the caller to explicitly pass an exchange rate or
* ensure fiat is shown even if the property is not set in state.
* @param {number} [overrides.exchangeRate] - An exhchange rate to use instead of the one selected from 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
* @return {string} - The formatted token amount in the user's chosen fiat currency
*/
export function useTokenFiatAmount(
tokenAddress,
tokenAmount,
tokenSymbol,
overrides = {},
hideCurrencySymbol,
) {
const contractExchangeRates = useSelector(getTokenExchangeRates)
const conversionRate = useSelector(getConversionRate)
const currentCurrency = useSelector(getCurrentCurrency)
const userPrefersShownFiat = useSelector(getShouldShowFiat)
const showFiat = overrides.showFiat ?? userPrefersShownFiat
const tokenExchangeRate =
overrides.exchangeRate ?? contractExchangeRates[tokenAddress]
const formattedFiat = useMemo(
() =>
getTokenFiatAmount(
tokenExchangeRate,
conversionRate,
currentCurrency,
tokenAmount,
tokenSymbol,
true,
hideCurrencySymbol,
),
[
tokenExchangeRate,
conversionRate,
currentCurrency,
tokenAmount,
tokenSymbol,
hideCurrencySymbol,
],
)
if (!showFiat || currentCurrency.toUpperCase() === tokenSymbol) {
return undefined
}
return formattedFiat
}