feat: adding currency conversion hook to useUSDPrice (#7251)

* feat: adding currency conversion hook

* 5m cache policy

* conversion rate hook

* usd check in outer hook

* converting usd price to localcurrencyprice

* checking usd manually

src/components/swap/SwapModalHeader.tsx

@@ -1,7 +1,7 @@
 import { Trans } from '@lingui/macro'
 import { Currency, Percent, TradeType } from '@uniswap/sdk-core'
 import Column, { AutoColumn } from 'components/Column'
-import { useUSDPrice } from 'hooks/useUSDPrice'
+import { useLocalCurrencyPrice } from 'hooks/useLocalCurrencyPrice'
 import { InterfaceTrade } from 'state/routing/types'
 import { Field } from 'state/swap/actions'
 import styled from 'styled-components'
@@ -26,8 +26,8 @@ export default function SwapModalHeader({
   inputCurrency?: Currency
   allowedSlippage: Percent
 }) {
-  const fiatValueInput = useUSDPrice(trade.inputAmount)
+  const fiatValueInput = useLocalCurrencyPrice(trade.inputAmount)
-  const fiatValueOutput = useUSDPrice(trade.postTaxOutputAmount)
+  const fiatValueOutput = useLocalCurrencyPrice(trade.postTaxOutputAmount)
 
   return (
     <HeaderContainer gap="sm">

src/components/swap/TradePrice.tsx

@@ -1,6 +1,6 @@
 import { Trans } from '@lingui/macro'
 import { Currency, Price } from '@uniswap/sdk-core'
-import { useUSDPrice } from 'hooks/useUSDPrice'
+import { useLocalCurrencyPrice } from 'hooks/useLocalCurrencyPrice'
 import tryParseCurrencyAmount from 'lib/utils/tryParseCurrencyAmount'
 import { useCallback, useMemo, useState } from 'react'
 import styled from 'styled-components'
@@ -31,7 +31,9 @@ export default function TradePrice({ price }: TradePriceProps) {
   const [showInverted, setShowInverted] = useState<boolean>(false)
 
   const { baseCurrency, quoteCurrency } = price
-  const { data: usdPrice } = useUSDPrice(tryParseCurrencyAmount('1', showInverted ? baseCurrency : quoteCurrency))
+  const { data: usdPrice } = useLocalCurrencyPrice(
+    tryParseCurrencyAmount('1', showInverted ? baseCurrency : quoteCurrency)
+  )
 
   const formattedPrice = useMemo(() => {
     try {

src/constants/localCurrencies.tsx

@@ -1,3 +1,4 @@
+import { Currency } from 'graphql/data/__generated__/types-and-hooks'
 import { ReactNode } from 'react'
 
 import {
@@ -22,29 +23,29 @@ import {
 } from './localCurrencyIcons'
 
 export const SUPPORTED_LOCAL_CURRENCIES = [
-  'USD',
+  Currency.Usd,
-  'AUD',
+  Currency.Aud,
-  'BRL',
+  Currency.Brl,
-  'CAD',
+  Currency.Cad,
-  'EUR',
+  Currency.Eur,
-  'GBP',
+  Currency.Gbp,
-  'HKD',
+  Currency.Hkd,
-  'IDR',
+  Currency.Idr,
-  'INR',
+  Currency.Inr,
-  'JPY',
+  Currency.Jpy,
-  'NGN',
+  Currency.Ngn,
-  'PKR',
+  Currency.Pkr,
-  'RUB',
+  Currency.Rub,
-  'SGD',
+  Currency.Sgd,
-  'THB',
+  Currency.Thb,
-  'TRY',
+  Currency.Try,
-  'UAH',
+  Currency.Uah,
-  'VND',
+  Currency.Vnd,
-]
+] as const
 
 export type SupportedLocalCurrency = (typeof SUPPORTED_LOCAL_CURRENCIES)[number]
 
-export const DEFAULT_LOCAL_CURRENCY: SupportedLocalCurrency = 'USD'
+export const DEFAULT_LOCAL_CURRENCY: SupportedLocalCurrency = Currency.Usd
 
 // some currencies need to be forced to use the narrow symbol and others need to be forced to use symbol
 // for example: when CAD is set to narrowSymbol it is displayed as $ which offers no differentiation from USD
@@ -73,41 +74,41 @@ export const LOCAL_CURRENCY_SYMBOL_DISPLAY_TYPE: Record<SupportedLocalCurrency,
 
 export function getLocalCurrencyIcon(localCurrency: SupportedLocalCurrency, size = 20): ReactNode {
   switch (localCurrency) {
-    case 'USD':
+    case Currency.Usd:
       return <USD_ICON width={size} height={size} />
-    case 'EUR':
+    case Currency.Eur:
       return <EUR_ICON width={size} height={size} />
-    case 'RUB':
+    case Currency.Rub:
       return <RUB_ICON width={size} height={size} />
-    case 'INR':
+    case Currency.Inr:
       return <INR_ICON width={size} height={size} />
-    case 'GBP':
+    case Currency.Gbp:
       return <GBP_ICON width={size} height={size} />
-    case 'JPY':
+    case Currency.Jpy:
       return <JPY_ICON width={size} height={size} />
-    case 'VND':
+    case Currency.Vnd:
       return <VND_ICON width={size} height={size} />
-    case 'SGD':
+    case Currency.Sgd:
       return <SGD_ICON width={size} height={size} />
-    case 'BRL':
+    case Currency.Brl:
       return <BRL_ICON width={size} height={size} />
-    case 'HKD':
+    case Currency.Hkd:
       return <HKD_ICON width={size} height={size} />
-    case 'CAD':
+    case Currency.Cad:
       return <CAD_ICON width={size} height={size} />
-    case 'IDR':
+    case Currency.Idr:
       return <IDR_ICON width={size} height={size} />
-    case 'TRY':
+    case Currency.Try:
       return <TRY_ICON width={size} height={size} />
-    case 'NGN':
+    case Currency.Ngn:
       return <NGN_ICON width={size} height={size} />
-    case 'AUD':
+    case Currency.Aud:
       return <AUD_ICON width={size} height={size} />
-    case 'PKR':
+    case Currency.Pkr:
       return <PKR_ICON width={size} height={size} />
-    case 'UAH':
+    case Currency.Uah:
       return <UAH_ICON width={size} height={size} />
-    case 'THB':
+    case Currency.Thb:
       return <THB_ICON width={size} height={size} />
     default:
       return null

src/graphql/data/ConversionRate.ts

@@ -0,0 +1,29 @@
+import { SupportedLocalCurrency } from 'constants/localCurrencies'
+import gql from 'graphql-tag'
+import ms from 'ms'
+import { getFetchPolicyForKey } from 'utils/getFetchPolicyForKey'
+
+import { useConvertQuery } from './__generated__/types-and-hooks'
+
+gql`
+  query Convert($toCurrency: Currency!) {
+    convert(fromAmount: { currency: USD, value: 1.0 }, toCurrency: $toCurrency) {
+      id
+      value
+      currency
+    }
+  }
+`
+
+export function useLocalCurrencyConversionRate(localCurrency: SupportedLocalCurrency, skip?: boolean) {
+  const { data, loading } = useConvertQuery({
+    variables: { toCurrency: localCurrency },
+    fetchPolicy: getFetchPolicyForKey(`convert-${localCurrency}`, ms('5m')),
+    skip,
+  })
+
+  return {
+    data: data?.convert?.value,
+    isLoading: loading,
+  }
+}

src/hooks/useLocalCurrencyPrice.ts

@@ -0,0 +1,27 @@
+import { Currency } from 'graphql/data/__generated__/types-and-hooks'
+import { useLocalCurrencyConversionRate } from 'graphql/data/ConversionRate'
+
+import { useActiveLocalCurrency } from './useActiveLocalCurrency'
+import { useUSDPrice } from './useUSDPrice'
+
+type useUSDPriceParameters = Parameters<typeof useUSDPrice>
+
+export function useLocalCurrencyPrice(...useUSDPriceParameters: useUSDPriceParameters) {
+  const activeLocalCurrency = useActiveLocalCurrency()
+  const activeLocalCurrencyIsUSD = activeLocalCurrency === Currency.Usd
+
+  const { data: usdPrice, isLoading: isUSDPriceLoading } = useUSDPrice(...useUSDPriceParameters)
+  const { data: localCurrencyConversionRate, isLoading: isLocalCurrencyConversionRateLoading } =
+    useLocalCurrencyConversionRate(activeLocalCurrency, activeLocalCurrencyIsUSD)
+
+  if (activeLocalCurrencyIsUSD) {
+    return { data: usdPrice, isLoading: isUSDPriceLoading }
+  }
+
+  const isLoading = isUSDPriceLoading || isLocalCurrencyConversionRateLoading
+  if (!usdPrice || !localCurrencyConversionRate) {
+    return { data: undefined, isLoading }
+  }
+
+  return { data: usdPrice * localCurrencyConversionRate, isLoading: false }
+}

src/nft/hooks/useUsdPrice.ts

@@ -1,6 +1,6 @@
 import { formatEther } from '@ethersproject/units'
 import { ChainId } from '@uniswap/sdk-core'
-import { useUSDPrice } from 'hooks/useUSDPrice'
+import { useLocalCurrencyPrice } from 'hooks/useLocalCurrencyPrice'
 import useNativeCurrency from 'lib/hooks/useNativeCurrency'
 import tryParseCurrencyAmount from 'lib/utils/tryParseCurrencyAmount'
 import { GenieAsset } from 'nft/types'
@@ -8,7 +8,7 @@ import { GenieAsset } from 'nft/types'
 export const useNativeUsdPrice = (chainId: number = ChainId.MAINNET): number => {
   const nativeCurrency = useNativeCurrency(chainId)
   const parsedAmount = tryParseCurrencyAmount('1', nativeCurrency)
-  const usdcValue = useUSDPrice(parsedAmount)?.data ?? 0
+  const usdcValue = useLocalCurrencyPrice(parsedAmount)?.data ?? 0
   return usdcValue
 }
 

src/pages/Swap/index.tsx

@@ -34,12 +34,12 @@ import { asSupportedChain, isSupportedChain } from 'constants/chains'
 import { getSwapCurrencyId, TOKEN_SHORTHANDS } from 'constants/tokens'
 import { useCurrency, useDefaultActiveTokens } from 'hooks/Tokens'
 import { useIsSwapUnsupported } from 'hooks/useIsSwapUnsupported'
+import { useLocalCurrencyPrice } from 'hooks/useLocalCurrencyPrice'
 import { useMaxAmountIn } from 'hooks/useMaxAmountIn'
 import usePermit2Allowance, { AllowanceState } from 'hooks/usePermit2Allowance'
 import usePrevious from 'hooks/usePrevious'
 import { SwapResult, useSwapCallback } from 'hooks/useSwapCallback'
 import { useSwitchChain } from 'hooks/useSwitchChain'
-import { useUSDPrice } from 'hooks/useUSDPrice'
 import useWrapCallback, { WrapErrorText, WrapType } from 'hooks/useWrapCallback'
 import JSBI from 'jsbi'
 import { formatSwapQuoteReceivedEventProperties } from 'lib/utils/analytics'
@@ -313,8 +313,8 @@ export function Swap({
     [independentField, parsedAmount, showWrap, trade]
   )
 
-  const fiatValueInput = useUSDPrice(parsedAmounts[Field.INPUT], currencies[Field.INPUT] ?? undefined)
+  const fiatValueInput = useLocalCurrencyPrice(parsedAmounts[Field.INPUT], currencies[Field.INPUT] ?? undefined)
-  const fiatValueOutput = useUSDPrice(parsedAmounts[Field.OUTPUT], currencies[Field.OUTPUT] ?? undefined)
+  const fiatValueOutput = useLocalCurrencyPrice(parsedAmounts[Field.OUTPUT], currencies[Field.OUTPUT] ?? undefined)
   const showFiatValueInput = Boolean(parsedAmounts[Field.INPUT])
   const showFiatValueOutput = Boolean(parsedAmounts[Field.OUTPUT])
 
@@ -327,9 +327,9 @@ export function Swap({
     [trade, tradeState]
   )
 
-  const fiatValueTradeInput = useUSDPrice(trade?.inputAmount)
+  const fiatValueTradeInput = useLocalCurrencyPrice(trade?.inputAmount)
-  const fiatValueTradeOutput = useUSDPrice(trade?.postTaxOutputAmount)
+  const fiatValueTradeOutput = useLocalCurrencyPrice(trade?.postTaxOutputAmount)
-  const preTaxFiatValueTradeOutput = useUSDPrice(trade?.outputAmount)
+  const preTaxFiatValueTradeOutput = useLocalCurrencyPrice(trade?.outputAmount)
   const [stablecoinPriceImpact, preTaxStablecoinPriceImpact] = useMemo(
     () =>
       routeIsSyncing || !isClassicTrade(trade)

src/utils/getFetchPolicyForKey.ts

@@ -0,0 +1,16 @@
+import { WatchQueryFetchPolicy } from '@apollo/client'
+
+const keys = new Map<string, number>()
+
+export const getFetchPolicyForKey = (key: string, expirationMs: number): WatchQueryFetchPolicy => {
+  const lastFetchTimestamp = keys.get(key)
+  const diffFromNow = lastFetchTimestamp ? Date.now() - lastFetchTimestamp : Number.MAX_SAFE_INTEGER
+  let fetchPolicy: WatchQueryFetchPolicy = 'cache-first'
+
+  if (diffFromNow > expirationMs) {
+    keys.set(key, Date.now())
+    fetchPolicy = 'network-only'
+  }
+
+  return fetchPolicy
+}