fix: render invalid address warnings on token details (#5260)

* initial commit
* polishing loading state
* small refactors
* polished on chain token network switching
* fixed commited merge conflict
* small refactor
* fixed merge conflicts
* PR comments and refactors
* fix unintented trace property change
* second round of comments

src/assets/svg/eye.svg

@@ -0,0 +1,4 @@
+<svg width="54" height="40" viewBox="0 0 54 40" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M1.3335 19.9997C1.3335 19.9997 10.6668 1.33301 27.0002 1.33301C43.3335 1.33301 52.6668 19.9997 52.6668 19.9997C52.6668 19.9997 43.3335 38.6663 27.0002 38.6663C10.6668 38.6663 1.3335 19.9997 1.3335 19.9997Z" stroke="#98A1C0" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M27.0002 26.9997C30.8662 26.9997 34.0002 23.8657 34.0002 19.9997C34.0002 16.1337 30.8662 12.9997 27.0002 12.9997C23.1342 12.9997 20.0002 16.1337 20.0002 19.9997C20.0002 23.8657 23.1342 26.9997 27.0002 26.9997Z" stroke="#98A1C0" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

src/components/Tokens/TokenDetails/InvalidTokenDetails.tsx

@@ -0,0 +1,54 @@
+import { Trans } from '@lingui/macro'
+import { useNavigate } from 'react-router-dom'
+import styled from 'styled-components/macro'
+
+import { ReactComponent as EyeIcon } from '../../../assets/svg/eye.svg'
+
+const InvalidDetailsContainer = styled.div`
+  padding-top: 128px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+`
+
+const InvalidDetailsText = styled.span`
+  margin-top: 28px;
+  margin-bottom: 20px;
+
+  text-align: center;
+
+  color: ${({ theme }) => theme.textSecondary};
+  font-size: 20px;
+  font-weight: 500;
+  line-height: 28px;
+`
+
+const TokenExploreButton = styled.button`
+  border: none;
+  border-radius: 12px;
+  background-color: ${({ theme }) => theme.accentAction};
+  padding: 12px 16px;
+
+  color: ${({ theme }) => theme.textPrimary};
+  font-size: 16px;
+  font-weight: 600;
+`
+
+export default function InvalidTokenDetails({ chainName }: { chainName?: string }) {
+  const navigate = useNavigate()
+  return (
+    <InvalidDetailsContainer>
+      <EyeIcon />
+      <InvalidDetailsText>
+        {chainName ? (
+          <Trans>{`This token doesn't exist on ${chainName}`}</Trans>
+        ) : (
+          <Trans>This token doesn&apos;t exist</Trans>
+        )}
+      </InvalidDetailsText>
+      <TokenExploreButton onClick={() => navigate('/tokens')}>
+        <Trans>Explore tokens</Trans>
+      </TokenExploreButton>
+    </InvalidDetailsContainer>
+  )
+}

src/components/Tokens/TokenDetails/PriceChart.tsx

@@ -114,9 +114,7 @@ export function PriceChart({ width, height, prices, timePeriod }: PriceChartProp
 
   // set display price to ending price when prices have changed.
   useEffect(() => {
-    if (prices) {
     setDisplayPrice(endingPrice)
-    }
   }, [prices, endingPrice])
   const [crosshair, setCrosshair] = useState<number | null>(null)
 

src/components/Tokens/TokenDetails/index.tsx

@@ -1,7 +1,8 @@
 import { Trans } from '@lingui/macro'
 import { Trace } from '@uniswap/analytics'
 import { PageName } from '@uniswap/analytics-events'
-import { Currency, Token } from '@uniswap/sdk-core'
+import { Currency } from '@uniswap/sdk-core'
+import { useWeb3React } from '@web3-react/core'
 import CurrencyLogo from 'components/Logo/CurrencyLogo'
 import { AboutSection } from 'components/Tokens/TokenDetails/About'
 import AddressSection from 'components/Tokens/TokenDetails/AddressSection'
@@ -24,21 +25,24 @@ import TokenSafetyMessage from 'components/TokenSafety/TokenSafetyMessage'
 import TokenSafetyModal from 'components/TokenSafety/TokenSafetyModal'
 import Widget from 'components/Widget'
 import { getChainInfo } from 'constants/chainInfo'
-import { DEFAULT_ERC20_DECIMALS, NATIVE_CHAIN_ID, nativeOnChain } from 'constants/tokens'
+import { NATIVE_CHAIN_ID, nativeOnChain } from 'constants/tokens'
 import { checkWarning } from 'constants/tokenSafety'
 import { TokenPriceQuery } from 'graphql/data/__generated__/TokenPriceQuery.graphql'
-import { Chain, TokenQuery } from 'graphql/data/Token'
+import { Chain, TokenQuery, TokenQueryData } from 'graphql/data/Token'
 import { QueryToken, tokenQuery } from 'graphql/data/Token'
-import { CHAIN_NAME_TO_CHAIN_ID } from 'graphql/data/util'
+import { CHAIN_NAME_TO_CHAIN_ID, getTokenDetailsURL } from 'graphql/data/util'
 import { useIsUserAddedTokenOnChain } from 'hooks/Tokens'
 import { useOnGlobalChainSwitch } from 'hooks/useGlobalChainSwitch'
+import { UNKNOWN_TOKEN_SYMBOL, useTokenFromActiveNetwork } from 'lib/hooks/useCurrency'
 import { useCallback, useMemo, useState, useTransition } from 'react'
 import { ArrowLeft } from 'react-feather'
 import { PreloadedQuery, usePreloadedQuery } from 'react-relay'
 import { useNavigate } from 'react-router-dom'
 import styled from 'styled-components/macro'
+import { isAddress } from 'utils'
 
 import { RefetchPricesFunction } from './ChartSection'
+import InvalidTokenDetails from './InvalidTokenDetails'
 
 const TokenSymbol = styled.span`
   text-transform: uppercase;
@@ -50,56 +54,100 @@ const TokenActions = styled.div`
   color: ${({ theme }) => theme.textSecondary};
 `
 
+function useOnChainToken(address: string | undefined, skip: boolean) {
+  const token = useTokenFromActiveNetwork(skip || !address ? undefined : address)
+
+  if (skip || !address || (token && token?.symbol === UNKNOWN_TOKEN_SYMBOL)) {
+    return undefined
+  } else {
+    return token
+  }
+}
+
+// Selects most relevant token based on data available, preferring native > query > on-chain
+// Token will be null if still loading from on-chain, and undefined if unavailable
+function useRelevantToken(
+  address: string | undefined,
+  pageChainId: number,
+  tokenQueryData: TokenQueryData | undefined
+) {
+  const { chainId: activeChainId } = useWeb3React()
+  const queryToken = useMemo(() => {
+    if (!address) return undefined
+    if (address === NATIVE_CHAIN_ID) return nativeOnChain(pageChainId)
+    if (tokenQueryData) return new QueryToken(tokenQueryData)
+    return undefined
+  }, [pageChainId, address, tokenQueryData])
+  // fetches on-chain token if query data is missing and page chain matches global chain (else fetch won't work)
+  const skipOnChainFetch = Boolean(queryToken) || pageChainId !== activeChainId
+  const onChainToken = useOnChainToken(address, skipOnChainFetch)
+
+  return useMemo(
+    () => ({ token: queryToken ?? onChainToken, didFetchFromChain: !queryToken }),
+    [onChainToken, queryToken]
+  )
+}
+
 type TokenDetailsProps = {
-  tokenAddress: string | undefined
+  urlAddress: string | undefined
   chain: Chain
   tokenQueryReference: PreloadedQuery<TokenQuery>
   priceQueryReference: PreloadedQuery<TokenPriceQuery> | null | undefined
   refetchTokenPrices: RefetchPricesFunction
 }
 export default function TokenDetails({
-  tokenAddress,
+  urlAddress,
   chain,
   tokenQueryReference,
   priceQueryReference,
   refetchTokenPrices,
 }: TokenDetailsProps) {
-  if (!tokenAddress) {
+  if (!urlAddress) {
-    throw new Error(`Invalid token details route: tokenAddress param is undefined`)
+    throw new Error('Invalid token details route: tokenAddress param is undefined')
   }
+  const address = useMemo(
+    () => (urlAddress === NATIVE_CHAIN_ID ? urlAddress : isAddress(urlAddress) || undefined),
+    [urlAddress]
+  )
 
   const pageChainId = CHAIN_NAME_TO_CHAIN_ID[chain]
-  const nativeCurrency = nativeOnChain(pageChainId)
-  const isNative = tokenAddress === NATIVE_CHAIN_ID
 
   const tokenQueryData = usePreloadedQuery(tokenQuery, tokenQueryReference).tokens?.[0]
+  const crossChainMap = useMemo(
+    () =>
+      tokenQueryData?.project?.tokens.reduce((map, current) => {
+        if (current) map[current.chain] = current.address
+        return map
+      }, {} as { [key: string]: string | undefined }) ?? {},
+    [tokenQueryData]
+  )
 
-  const token = useMemo(() => {
+  const { token, didFetchFromChain } = useRelevantToken(address, pageChainId, tokenQueryData)
-    if (isNative) return nativeCurrency
+
-    if (tokenQueryData) return new QueryToken(tokenQueryData)
+  const tokenWarning = address ? checkWarning(address) : null
-    return new Token(pageChainId, tokenAddress, DEFAULT_ERC20_DECIMALS)
-  }, [isNative, nativeCurrency, pageChainId, tokenAddress, tokenQueryData])
-  const tokenWarning = tokenAddress ? checkWarning(tokenAddress) : null
   const isBlockedToken = tokenWarning?.canProceed === false
-
   const navigate = useNavigate()
+
   // Wrapping navigate in a transition prevents Suspense from unnecessarily showing fallbacks again.
   const [isPending, startTokenTransition] = useTransition()
   const navigateToTokenForChain = useCallback(
-    (chain: Chain) => {
+    (update: Chain) => {
-      const chainName = chain.toLowerCase()
-      const token = tokenQueryData?.project?.tokens.find((token) => token.chain === chain && token.address)
-      const address = isNative ? NATIVE_CHAIN_ID : token?.address
       if (!address) return
-      startTokenTransition(() => navigate(`/tokens/${chainName}/${address}`))
+      const bridgedAddress = crossChainMap[update]
+      if (bridgedAddress) {
+        startTokenTransition(() => navigate(getTokenDetailsURL(bridgedAddress, update)))
+      } else if (didFetchFromChain || token?.isNative) {
+        startTokenTransition(() => navigate(getTokenDetailsURL(address, update)))
+      }
     },
-    [isNative, navigate, startTokenTransition, tokenQueryData?.project?.tokens]
+    [address, crossChainMap, didFetchFromChain, navigate, token?.isNative]
   )
   useOnGlobalChainSwitch(navigateToTokenForChain)
+
   const navigateToWidgetSelectedToken = useCallback(
     (token: Currency) => {
       const address = token.isNative ? NATIVE_CHAIN_ID : token.address
-      startTokenTransition(() => navigate(`/tokens/${chain.toLowerCase()}/${address}`))
+      startTokenTransition(() => navigate(getTokenDetailsURL(address, chain)))
     },
     [chain, navigate]
   )
@@ -107,7 +155,7 @@ export default function TokenDetails({
   const [continueSwap, setContinueSwap] = useState<{ resolve: (value: boolean | PromiseLike<boolean>) => void }>()
 
   // Show token safety modal if Swap-reviewing a warning token, at all times if the current token is blocked
-  const shouldShowSpeedbump = !useIsUserAddedTokenOnChain(tokenAddress, pageChainId) && tokenWarning !== null
+  const shouldShowSpeedbump = !useIsUserAddedTokenOnChain(address, pageChainId) && tokenWarning !== null
   const onReviewSwapClick = useCallback(
     () => new Promise<boolean>((resolve) => (shouldShowSpeedbump ? setContinueSwap({ resolve }) : resolve(true))),
     [shouldShowSpeedbump]
@@ -123,10 +171,18 @@ export default function TokenDetails({
 
   const L2Icon = getChainInfo(pageChainId)?.circleLogoUrl
 
+  // address will never be undefined if token is defined; address is checked here to appease typechecker
+  if (token === undefined || !address) {
+    return <InvalidTokenDetails chainName={address && getChainInfo(pageChainId)?.label} />
+  }
   return (
-    <Trace page={PageName.TOKEN_DETAILS_PAGE} properties={{ tokenAddress, tokenName: token?.name }} shouldLogImpression>
+    <Trace
+      page={PageName.TOKEN_DETAILS_PAGE}
+      properties={{ tokenAddress: address, tokenName: token?.name }}
+      shouldLogImpression
+    >
       <TokenDetailsLayout>
-        {tokenQueryData && !isPending ? (
+        {token && !isPending ? (
           <LeftPanel>
             <BreadcrumbNavLink to={`/tokens/${chain.toLowerCase()}`}>
               <ArrowLeft size={14} /> Tokens
@@ -137,32 +193,30 @@ export default function TokenDetails({
                   <CurrencyLogo currency={token} size="32px" />
                   <L2NetworkLogo networkUrl={L2Icon} size="16px" />
                 </LogoContainer>
-                {token?.name ?? <Trans>Name not found</Trans>}
+                {token.name ?? <Trans>Name not found</Trans>}
-                <TokenSymbol>{token?.symbol ?? <Trans>Symbol not found</Trans>}</TokenSymbol>
+                <TokenSymbol>{token.symbol ?? <Trans>Symbol not found</Trans>}</TokenSymbol>
               </TokenNameCell>
               <TokenActions>
-                {tokenQueryData?.name && tokenQueryData.symbol && tokenQueryData.address && (
                 <ShareButton currency={token} />
-                )}
               </TokenActions>
             </TokenInfoContainer>
             <ChartSection priceQueryReference={priceQueryReference} refetchTokenPrices={refetchTokenPrices} />
             <StatsSection
-              TVL={tokenQueryData.market?.totalValueLocked?.value}
+              TVL={tokenQueryData?.market?.totalValueLocked?.value}
-              volume24H={tokenQueryData.market?.volume24H?.value}
+              volume24H={tokenQueryData?.market?.volume24H?.value}
-              priceHigh52W={tokenQueryData.market?.priceHigh52W?.value}
+              priceHigh52W={tokenQueryData?.market?.priceHigh52W?.value}
-              priceLow52W={tokenQueryData.market?.priceLow52W?.value}
+              priceLow52W={tokenQueryData?.market?.priceLow52W?.value}
             />
-            {!isNative && (
+            {!token.isNative && (
               <>
                 <Hr />
                 <AboutSection
-                  address={tokenQueryData.address ?? ''}
+                  address={address}
-                  description={tokenQueryData.project?.description}
+                  description={tokenQueryData?.project?.description}
-                  homepageUrl={tokenQueryData.project?.homepageUrl}
+                  homepageUrl={tokenQueryData?.project?.homepageUrl}
-                  twitterName={tokenQueryData.project?.twitterName}
+                  twitterName={tokenQueryData?.project?.twitterName}
                 />
-                <AddressSection address={tokenQueryData.address ?? ''} />
+                <AddressSection address={address} />
               </>
             )}
           </LeftPanel>
@@ -172,25 +226,23 @@ export default function TokenDetails({
 
         <RightPanel>
           <Widget
-            token={token ?? nativeCurrency}
+            token={token ?? undefined}
             onTokenChange={navigateToWidgetSelectedToken}
             onReviewSwapClick={onReviewSwapClick}
           />
-          {tokenWarning && <TokenSafetyMessage tokenAddress={tokenAddress ?? ''} warning={tokenWarning} />}
+          {tokenWarning && <TokenSafetyMessage tokenAddress={address} warning={tokenWarning} />}
           {token && <BalanceSummary token={token} />}
         </RightPanel>
         {token && <MobileBalanceSummaryFooter token={token} />}
 
-        {tokenAddress && (
         <TokenSafetyModal
           isOpen={isBlockedToken || !!continueSwap}
-            tokenAddress={tokenAddress}
+          tokenAddress={address}
           onContinue={() => onResolveSwap(true)}
           onBlocked={() => navigate(-1)}
           onCancel={() => onResolveSwap(false)}
           showCancel={true}
         />
-        )}
       </TokenDetailsLayout>
     </Trace>
   )

src/graphql/data/Token.ts

@@ -48,8 +48,8 @@ export const tokenQuery = graphql`
         twitterName
         logoUrl
         tokens {
-          chain
+          chain @required(action: LOG)
-          address
+          address @required(action: LOG)
         }
       }
     }

src/lib/hooks/useCurrency.ts

@@ -25,6 +25,9 @@ function parseStringOrBytes32(str: string | undefined, bytes32: string | undefin
     : defaultValue
 }
 
+export const UNKNOWN_TOKEN_SYMBOL = 'UNKNOWN'
+export const UNKNOWN_TOKEN_NAME = 'Unknown Token'
+
 /**
  * Returns a Token from the tokenAddress.
  * Returns null if token is loading or null was passed.
@@ -51,11 +54,11 @@ export function useTokenFromActiveNetwork(tokenAddress: string | undefined): Tok
   const parsedDecimals = useMemo(() => decimals?.result?.[0] ?? DEFAULT_ERC20_DECIMALS, [decimals.result])
 
   const parsedSymbol = useMemo(
-    () => parseStringOrBytes32(symbol.result?.[0], symbolBytes32.result?.[0], 'UNKNOWN'),
+    () => parseStringOrBytes32(symbol.result?.[0], symbolBytes32.result?.[0], UNKNOWN_TOKEN_SYMBOL),
     [symbol.result, symbolBytes32.result]
   )
   const parsedName = useMemo(
-    () => parseStringOrBytes32(tokenName.result?.[0], tokenNameBytes32.result?.[0], 'Unknown Token'),
+    () => parseStringOrBytes32(tokenName.result?.[0], tokenNameBytes32.result?.[0], UNKNOWN_TOKEN_NAME),
     [tokenName.result, tokenNameBytes32.result]
   )
 

src/pages/TokenDetails/index.tsx

@@ -46,7 +46,7 @@ export default function TokenDetailsPage() {
   return (
     <Suspense fallback={<TokenDetailsPageSkeleton />}>
       <TokenDetails
-        tokenAddress={tokenAddress}
+        urlAddress={tokenAddress}
         chain={chain}
         tokenQueryReference={tokenQueryReference}
         priceQueryReference={priceQueryReference}