Fix useSelector calls for accessing non-existent exchangeRates

CHANGELOG.md

@@ -12,6 +12,7 @@
 - changed: `TransactionListScene` split into two scenes: `TransactionListScene` and `WalletDetailsScene`
 - changed: All floating `NotificationCard`s are dismissible
 - fixed: Show correct staked balance for deprecated Velodrome pools
+- fixed: Crash when retrieving `exchangeRates` in some situations when no internet is available
 
 ## 4.21.1 (2025-01-28)
 

src/actions/ReceiveDropdown.tsx

@@ -7,6 +7,7 @@ import { FlashNotification } from '../components/navigation/FlashNotification'
 import { Airship, showError } from '../components/services/AirshipInstance'
 import { lstrings } from '../locales/strings'
 import { getExchangeDenom, selectDisplayDenom } from '../selectors/DenominationSelectors'
+import { getExchangeRate } from '../selectors/WalletSelectors'
 import { ThunkAction } from '../types/reduxTypes'
 import { NavigationBase } from '../types/routerTypes'
 import { calculateSpamThreshold, convertNativeToDisplay, zeroString } from '../util/utils'
@@ -35,7 +36,7 @@ export function showReceiveDropdown(navigation: NavigationBase, transaction: Edg
 
     // Check the spam limits:
     const { spamFilterOn } = state.ui.settings
-    const exchangeRate = state.exchangeRates[`${currencyCode}_${isoFiatCurrencyCode}`]
+    const exchangeRate = getExchangeRate(state, currencyCode, isoFiatCurrencyCode)
     const exchangeDenom = getExchangeDenom(wallet.currencyConfig, tokenId)
     const spamThreshold = calculateSpamThreshold(exchangeRate, exchangeDenom)
     if (spamFilterOn && (zeroString(exchangeRate) || lt(nativeAmount, spamThreshold))) {

src/components/scenes/WalletDetailsScene.tsx

@@ -16,6 +16,7 @@ import { useWatch } from '../../hooks/useWatch'
 import { formatNumber } from '../../locales/intl'
 import { lstrings } from '../../locales/strings'
 import { getExchangeDenomByCurrencyCode } from '../../selectors/DenominationSelectors'
+import { getExchangeRate } from '../../selectors/WalletSelectors'
 import { FooterRender } from '../../state/SceneFooterState'
 import { useSceneScrollHandler } from '../../state/SceneScrollState'
 import { useDispatch, useSelector } from '../../types/reactRedux'
@@ -72,8 +73,9 @@ function WalletDetailsComponent(props: Props) {
 
   // Selectors:
   const exchangeDenom = getExchangeDenomByCurrencyCode(wallet.currencyConfig, currencyCode)
-  const fiatCurrencyCode = useSelector(state => state.ui.settings.defaultIsoFiat).replace('iso:', '')
-  const exchangeRate = useSelector(state => state.exchangeRates[`${currencyCode}_${state.ui.settings.defaultIsoFiat}`])
+  const defaultIsoFiat = useSelector(state => state.ui.settings.defaultIsoFiat)
+  const fiatCurrencyCode = defaultIsoFiat.replace('iso:', '')
+  const exchangeRate = useSelector(state => getExchangeRate(state, currencyCode, defaultIsoFiat))
   const spamFilterOn = useSelector(state => state.ui.settings.spamFilterOn)
   const activeUsername = useSelector(state => state.core.account.username)
   const isLightAccount = activeUsername == null

src/components/themed/TransactionListRow.tsx

@@ -18,6 +18,7 @@ import { useHistoricalRate } from '../../hooks/useHistoricalRate'
 import { formatNumber } from '../../locales/intl'
 import { lstrings } from '../../locales/strings'
 import { getExchangeDenom } from '../../selectors/DenominationSelectors'
+import { getExchangeRate } from '../../selectors/WalletSelectors'
 import { useSelector } from '../../types/reactRedux'
 import { NavigationBase } from '../../types/routerTypes'
 import {
@@ -62,8 +63,7 @@ export function TransactionListRow(props: Props) {
   const defaultAmountFiat = metadata.exchangeAmount?.[defaultIsoFiat] ?? 0
 
   // CryptoAmount
-  const rateKey = `${currencyCode}_${defaultIsoFiat}`
-  const exchangeRate: string = useSelector(state => state.exchangeRates[rateKey])
+  const exchangeRate: string = useSelector(state => getExchangeRate(state, currencyCode, defaultIsoFiat))
   let maxConversionDecimals = DEFAULT_TRUNCATE_PRECISION
   if (exchangeRate != null && gt(exchangeRate, '0')) {
     const precisionAdjustValue = precisionAdjust({

src/components/tiles/NetworkFeeTile.tsx

@@ -5,6 +5,7 @@ import { useDisplayDenom } from '../../hooks/useDisplayDenom'
 import { useFiatText } from '../../hooks/useFiatText'
 import { lstrings } from '../../locales/strings'
 import { getExchangeDenom } from '../../selectors/DenominationSelectors'
+import { getExchangeRate } from '../../selectors/WalletSelectors'
 import { useSelector } from '../../types/reactRedux'
 import { getCryptoText } from '../../util/cryptoTextUtils'
 import { getDenomFromIsoCode } from '../../util/utils'
@@ -26,7 +27,7 @@ export const NetworkFeeTile = (props: Props) => {
   const defaultIsoFiat = useSelector(state => state.ui.settings.defaultIsoFiat)
 
   const fiatDenomination = getDenomFromIsoCode(defaultIsoFiat)
-  const exchangeRate = useSelector(state => state.exchangeRates[`${currencyCode}_${defaultIsoFiat}`])
+  const exchangeRate = useSelector(state => getExchangeRate(state, currencyCode, defaultIsoFiat))
 
   const exchangeDenominationMultiplier = getExchangeDenom(currencyConfig, null).multiplier
   const exchangeDenominationName = getExchangeDenom(currencyConfig, null).name

src/hooks/useTokenDisplayData.ts

@@ -1,5 +1,6 @@
 import { EdgeCurrencyWallet, EdgeTokenId } from 'edge-core-js'
 
+import { getExchangeRate } from '../selectors/WalletSelectors'
 import { useSelector } from '../types/reactRedux'
 import { getDenomFromIsoCode, zeroString } from '../util/utils'
 
@@ -27,7 +28,7 @@ export const useTokenDisplayData = (props: { tokenId: EdgeTokenId; wallet: EdgeC
   // BASE / QUOTE = PRICE, where:
   // - 'Fiat' is the QUOTE, defined by the wallet's fiatCurrencyCode
   // - 'Yest' is an index for a historical price from 24 hours ago.
-  const usdFiatPrice = useSelector(state => state.exchangeRates[`iso:USD_${isoFiatCurrencyCode}`])
+  const usdFiatPrice = useSelector(state => getExchangeRate(state, currencyCode, isoFiatCurrencyCode))
   const assetFiatPrice = useCurrencyFiatRate({
     currencyCode,
     isoFiatCurrencyCode