From 308cca189732aab752f3a8b4a76e42bfdfd49a87 Mon Sep 17 00:00:00 2001
From: ryanml <ryanlanese@gmail.com>
Date: Mon, 18 Oct 2021 10:31:34 -0700
Subject: [PATCH] Preventing swaps data re-fetch when navigating back to home
 screeen (#12370)

---
 ui/pages/swaps/index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ui/pages/swaps/index.js b/ui/pages/swaps/index.js
index 03772d4df..d10cf24e4 100644
--- a/ui/pages/swaps/index.js
+++ b/ui/pages/swaps/index.js
@@ -118,6 +118,7 @@ export default function Swap() {
   const chainId = useSelector(getCurrentChainId);
   const isSwapsChain = useSelector(getIsSwapsChain);
   const useNewSwapsApi = useSelector(getUseNewSwapsApi);
+  const prevUseNewSwapsApi = useRef(useNewSwapsApi);
   const networkAndAccountSupports1559 = useSelector(
     checkNetworkAndAccountSupports1559,
   );
@@ -193,7 +194,7 @@ export default function Swap() {
 
   // eslint-disable-next-line
   useEffect(() => {
-    if (isFeatureFlagLoaded) {
+    if (isFeatureFlagLoaded && prevUseNewSwapsApi.current === useNewSwapsApi) {
       fetchTokens(chainId, useNewSwapsApi)
         .then((tokens) => {
           dispatch(setSwapsTokens(tokens));
@@ -214,6 +215,7 @@ export default function Swap() {
         dispatch(prepareToLeaveSwaps());
       };
     }
+    prevUseNewSwapsApi.current = useNewSwapsApi;
   }, [
     dispatch,
     chainId,