improve the better trade link logic

src/components/swap/BetterTradeLink.tsx

@@ -24,7 +24,13 @@ function VersionLinkContainer({ children }: { children: React.ReactNode }) {
   )
 }
 
-export default function BetterTradeLink({ version }: { version: Version }) {
+export default function BetterTradeLink({
+  version,
+  otherTradeNonexistent = false,
+}: {
+  version: Version
+  otherTradeNonexistent: boolean
+}) {
   const location = useLocation()
   const search = useParsedQueryString()
 
@@ -40,7 +46,7 @@ export default function BetterTradeLink({ version }: { version: Version }) {
 
   return (
     <VersionLinkContainer>
-      There is a better price for this trade on{' '}
+      {otherTradeNonexistent ? 'This trade can be executed on ' : 'There is a better price for this trade on '}
       <StyledInternalLink to={linkDestination}>
         <b>Uniswap {version.toUpperCase()} ↗</b>
       </StyledInternalLink>

src/hooks/useBestV3Trade.ts

@@ -36,7 +36,7 @@ export function useBestV3TradeExactIn(
   const quotesResults = useSingleContractMultipleData(quoter, 'quoteExactInput', quoteExactInInputs)
 
   return useMemo(() => {
-    if (!amountIn || !currencyOut || quotesResults.some(({ valid }) => !valid)) {
+    if (!amountIn || !currencyOut) {
       return {
         state: V3TradeState.INVALID,
         trade: null,

src/pages/Swap/index.tsx

@@ -393,11 +393,12 @@ export default function Swap({ history }: RouteComponentProps) {
                 setShowInverted={setShowInverted}
               />
             ) : null}
-            {![V3TradeState.VALID, V3TradeState.SYNCING].includes(v3TradeState) ? null : toggledVersion ===
-                Version.v3 && isTradeBetter(v3Trade, v2Trade) ? (
-              <BetterTradeLink version={Version.v2} />
-            ) : toggledVersion === Version.v2 && isTradeBetter(v2Trade, v3Trade) ? (
-              <BetterTradeLink version={Version.v3} />
+            {[V3TradeState.VALID, V3TradeState.SYNCING, V3TradeState.NO_ROUTE_FOUND].includes(v3TradeState) ? (
+              toggledVersion === Version.v3 && isTradeBetter(v3Trade, v2Trade) ? (
+                <BetterTradeLink version={Version.v2} otherTradeNonexistent={!v3Trade} />
+              ) : toggledVersion === Version.v2 && isTradeBetter(v2Trade, v3Trade) ? (
+                <BetterTradeLink version={Version.v3} otherTradeNonexistent={!v2Trade} />
+              ) : null
             ) : null}
             <BottomGrouping>
               {swapIsUnsupported ? (