chore: currency percentages (#7358)

* formatPercent

* hook deps

* price chart

* price chart formatting

* bug bash findings

* Update src/utils/formatNumbers.ts
Co-authored-by: Zach Pomerantz <zzmp@uniswap.org>

* fixing merge errors

* unit tests

* special cases

---------
Co-authored-by: Zach Pomerantz <zzmp@uniswap.org>

src/components/AccountDrawer/AuthenticatedHeader.tsx

@@ -9,7 +9,7 @@ import { Power } from 'components/Icons/Power'
 import { Settings } from 'components/Icons/Settings'
 import { AutoRow } from 'components/Row'
 import { LoadingBubble } from 'components/Tokens/loading'
-import { DeltaArrow, formatDelta } from 'components/Tokens/TokenDetails/Delta'
+import { DeltaArrow } from 'components/Tokens/TokenDetails/Delta'
 import Tooltip from 'components/Tooltip'
 import { getConnection } from 'connection'
 import { useDisableNFTRoutes } from 'hooks/useDisableNFTRoutes'
@@ -161,7 +161,7 @@ export default function AuthenticatedHeader({ account, openSettings }: { account
   const clearCollectionFilters = useWalletCollections((state) => state.clearCollectionFilters)
   const isClaimAvailable = useIsNftClaimAvailable((state) => state.isClaimAvailable)
   const shouldShowBuyFiatButton = useIsNotOriginCountry('GB')
-  const { formatNumber } = useFormatter()
+  const { formatNumber, formatPercent } = useFormatter()
 
   const shouldDisableNFTRoutes = useDisableNFTRoutes()
 
@@ -284,7 +284,7 @@ export default function AuthenticatedHeader({ account, openSettings }: { account
                     {`${formatNumber({
                       input: Math.abs(absoluteChange as number),
                       type: NumberType.PortfolioBalance,
-                    })} (${formatDelta(percentChange)})`}
+                    })} (${formatPercent(percentChange)})`}
                   </ThemedText.BodySecondary>
                 </>
               )}

src/components/AccountDrawer/MiniPortfolio/Tokens/index.tsx

@@ -2,7 +2,7 @@ import { BrowserEvent, InterfaceElementName, SharedEventName } from '@uniswap/an
 import { TraceEvent } from 'analytics'
 import { useCachedPortfolioBalancesQuery } from 'components/PrefetchBalancesWrapper/PrefetchBalancesWrapper'
 import Row from 'components/Row'
-import { DeltaArrow, formatDelta } from 'components/Tokens/TokenDetails/Delta'
+import { DeltaArrow } from 'components/Tokens/TokenDetails/Delta'
 import { TokenBalance } from 'graphql/data/__generated__/types-and-hooks'
 import { getTokenDetailsURL, gqlToCurrency, logSentryErrorForUnsupportedChain } from 'graphql/data/util'
 import { useAtomValue } from 'jotai/utils'
@@ -71,6 +71,7 @@ const TokenNameText = styled(ThemedText.SubHeader)`
 type PortfolioToken = NonNullable<TokenBalance['token']>
 
 function TokenRow({ token, quantity, denominatedValue, tokenProjectMarket }: TokenBalance & { token: PortfolioToken }) {
+  const { formatPercent } = useFormatter()
   const percentChange = tokenProjectMarket?.pricePercentChange?.value ?? 0
 
   const navigate = useNavigate()
@@ -120,7 +121,7 @@ function TokenRow({ token, quantity, denominatedValue, tokenProjectMarket }: Tok
               </ThemedText.SubHeader>
               <Row justify="flex-end">
                 <DeltaArrow delta={percentChange} />
-                <ThemedText.BodySecondary>{formatDelta(percentChange)}</ThemedText.BodySecondary>
+                <ThemedText.BodySecondary>{formatPercent(percentChange)}</ThemedText.BodySecondary>
               </Row>
             </>
           )

src/components/Charts/PriceChart/index.tsx

@@ -20,7 +20,7 @@ import { ThemedText } from 'theme/components'
 import { textFadeIn } from 'theme/styles'
 import { useFormatter } from 'utils/formatNumbers'
 
-import { calculateDelta, DeltaArrow, formatDelta } from '../../Tokens/TokenDetails/Delta'
+import { calculateDelta, DeltaArrow } from '../../Tokens/TokenDetails/Delta'
 
 const CHART_MARGIN = { top: 100, bottom: 48, crosshair: 72 }
 
@@ -52,9 +52,11 @@ interface ChartDeltaProps {
 
 function ChartDelta({ startingPrice, endingPrice, noColor }: ChartDeltaProps) {
   const delta = calculateDelta(startingPrice.value, endingPrice.value)
+  const { formatPercent } = useFormatter()
+
   return (
     <DeltaContainer>
-      {formatDelta(delta)}
+      {formatPercent(delta)}
       <DeltaArrow delta={delta} noColor={noColor} />
     </DeltaContainer>
   )

src/components/NavBar/SuggestionRow.tsx

@@ -128,7 +128,7 @@ interface TokenRowProps {
 export const TokenRow = ({ token, isHovered, setHoveredIndex, toggleOpen, index, eventProperties }: TokenRowProps) => {
   const addRecentlySearchedAsset = useAddRecentlySearchedAsset()
   const navigate = useNavigate()
-  const { formatFiatPrice } = useFormatter()
+  const { formatFiatPrice, formatPercent } = useFormatter()
 
   const handleClick = useCallback(() => {
     const address = !token.address && token.standard === TokenStandard.Native ? 'NATIVE' : token.address
@@ -191,7 +191,7 @@ export const TokenRow = ({ token, isHovered, setHoveredIndex, toggleOpen, index,
               <DeltaArrow delta={token.market?.pricePercentChange?.value} />
               <ThemedText.BodySmall>
                 <DeltaText delta={token.market?.pricePercentChange?.value}>
-                  {Math.abs(token.market?.pricePercentChange?.value ?? 0).toFixed(2)}%
+                  {formatPercent(Math.abs(token.market?.pricePercentChange?.value ?? 0))}
                 </DeltaText>
               </ThemedText.BodySmall>
             </PriceChangeContainer>

src/components/Tokens/TokenDetails/Delta.tsx

@@ -24,13 +24,6 @@ interface DeltaArrowProps {
   size?: number
 }
 
-export function formatDelta(delta: number | null | undefined) {
-  if (!isValidDelta(delta)) return '-'
-
-  const formattedDelta = Math.abs(delta).toFixed(2) + '%'
-  return formattedDelta
-}
-
 export function DeltaArrow({ delta, noColor = false, size = 16 }: DeltaArrowProps) {
   if (!isValidDelta(delta)) return null
 

src/components/Tokens/TokenTable/TokenRow.tsx

@@ -34,7 +34,7 @@ import {
   TokenSortMethod,
   useSetSortMethod,
 } from '../state'
-import { DeltaArrow, DeltaText, formatDelta } from '../TokenDetails/Delta'
+import { DeltaArrow, DeltaText } from '../TokenDetails/Delta'
 
 const Cell = styled.div`
   display: flex;
@@ -441,7 +441,7 @@ interface LoadedRowProps {
 
 /* Loaded State: row component with token information */
 export const LoadedRow = forwardRef((props: LoadedRowProps, ref: ForwardedRef<HTMLDivElement>) => {
-  const { formatFiatPrice, formatNumber } = useFormatter()
+  const { formatFiatPrice, formatNumber, formatPercent } = useFormatter()
 
   const { tokenListIndex, tokenListLength, token, sortRank } = props
   const filterString = useAtomValue(filterStringAtom)
@@ -450,7 +450,7 @@ export const LoadedRow = forwardRef((props: LoadedRowProps, ref: ForwardedRef<HT
   const chainId = supportedChainIdFromGQLChain(filterNetwork)
   const timePeriod = useAtomValue(filterTimeAtom)
   const delta = token.market?.pricePercentChange?.value
-  const formattedDelta = formatDelta(delta)
+  const formattedDelta = formatPercent(delta)
 
   const exploreTokenSelectedEventProperties = {
     chain_id: chainId,

src/pages/PoolDetails/PoolDetailsStats.tsx

@@ -2,7 +2,7 @@ import { Trans } from '@lingui/macro'
 import Column from 'components/Column'
 import CurrencyLogo from 'components/Logo/CurrencyLogo'
 import Row from 'components/Row'
-import { DeltaArrow, formatDelta } from 'components/Tokens/TokenDetails/Delta'
+import { DeltaArrow } from 'components/Tokens/TokenDetails/Delta'
 import { PoolData } from 'graphql/thegraph/PoolData'
 import { useCurrency } from 'hooks/Tokens'
 import { useColor } from 'hooks/useColor'
@@ -199,7 +199,7 @@ const StatItemText = styled(Text)`
 `
 
 function StatItem({ title, value, delta }: { title: ReactNode; value: number; delta?: number }) {
-  const { formatNumber } = useFormatter()
+  const { formatNumber, formatPercent } = useFormatter()
 
   return (
     <StatItemColumn>
@@ -214,7 +214,7 @@ function StatItem({ title, value, delta }: { title: ReactNode; value: number; de
         {!!delta && (
           <Row width="max-content" padding="4px 0px">
             <DeltaArrow delta={delta} />
-            <ThemedText.BodySecondary>{formatDelta(delta)}</ThemedText.BodySecondary>
+            <ThemedText.BodySecondary>{formatPercent(delta)}</ThemedText.BodySecondary>
           </Row>
         )}
       </StatsTextContainer>

src/utils/formatNumbers.test.ts

@@ -460,3 +460,37 @@ describe('formatReviewSwapCurrencyAmount', () => {
     expect(formatReviewSwapCurrencyAmount(currencyAmount)).toBe('2000000')
   })
 })
+
+describe('formatPercent', () => {
+  beforeEach(() => {
+    mocked(useLocalCurrencyConversionRate).mockReturnValue({ data: 1.0, isLoading: false })
+    mocked(useCurrencyConversionFlagEnabled).mockReturnValue(true)
+  })
+
+  it.each([[null], [undefined], [Infinity], [NaN]])('should correctly format %p', (value) => {
+    const { formatPercent } = renderHook(() => useFormatter()).result.current
+
+    expect(formatPercent(value)).toBe('-')
+  })
+
+  it('correctly formats a percent with 2 decimal places', () => {
+    const { formatPercent } = renderHook(() => useFormatter()).result.current
+
+    expect(formatPercent(0)).toBe('0.00%')
+    expect(formatPercent(0.1)).toBe('0.10%')
+    expect(formatPercent(1)).toBe('1.00%')
+    expect(formatPercent(10)).toBe('10.00%')
+    expect(formatPercent(100)).toBe('100.00%')
+  })
+
+  it('correctly formats a percent with 2 decimal places in french locale', () => {
+    mocked(useActiveLocale).mockReturnValue('fr-FR')
+    const { formatPercent } = renderHook(() => useFormatter()).result.current
+
+    expect(formatPercent(0)).toBe('0,00%')
+    expect(formatPercent(0.1)).toBe('0,10%')
+    expect(formatPercent(1)).toBe('1,00%')
+    expect(formatPercent(10)).toBe('10,00%')
+    expect(formatPercent(100)).toBe('100,00%')
+  })
+})

src/utils/formatNumbers.ts

@@ -478,6 +478,18 @@ function formatSlippage(slippage: Percent | undefined, locale: SupportedLocale =
   })}%`
 }
 
+function formatPercent(percent: Nullish<number>, locale: SupportedLocale = DEFAULT_LOCALE) {
+  if (percent === null || percent === undefined || percent === Infinity || isNaN(percent)) {
+    return '-'
+  }
+
+  return `${Number(Math.abs(percent).toFixed(2)).toLocaleString(locale, {
+    minimumFractionDigits: 2,
+    maximumFractionDigits: 2,
+    useGrouping: false,
+  })}%`
+}
+
 interface FormatPriceOptions {
   price: Nullish<Price<Currency, Currency>>
   type: FormatterType
@@ -723,12 +735,18 @@ export function useFormatter() {
     [currencyToFormatWith, formatterLocale, localCurrencyConversionRateToFormatWith]
   )
 
+  const formatPercentWithLocales = useCallback(
+    (percent: Nullish<number>) => formatPercent(percent, formatterLocale),
+    [formatterLocale]
+  )
+
   return useMemo(
     () => ({
       formatCurrencyAmount: formatCurrencyAmountWithLocales,
       formatFiatPrice: formatFiatPriceWithLocales,
       formatNumber: formatNumberWithLocales,
       formatNumberOrString: formatNumberOrStringWithLocales,
+      formatPercent: formatPercentWithLocales,
       formatPrice: formatPriceWithLocales,
       formatPriceImpact: formatPriceImpactWithLocales,
       formatReviewSwapCurrencyAmount: formatReviewSwapCurrencyAmountWithLocales,
@@ -740,6 +758,7 @@ export function useFormatter() {
       formatFiatPriceWithLocales,
       formatNumberOrStringWithLocales,
       formatNumberWithLocales,
+      formatPercentWithLocales,
       formatPriceImpactWithLocales,
       formatPriceWithLocales,
       formatReviewSwapCurrencyAmountWithLocales,