fix: use PORTFOLIO_VIEW flag to determine chain polling (#28504)

## **Description**

Updates the token price and detection hooks to only poll across chains
when `PORTFOLIO_VIEW` is set.

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## **Related issues**

## **Manual testing steps**

1. With `PORTFOLIO_VIEW=1`, requests should go to the price api across
all chains.
2. Without `PORTFOLIO_VIEW=1`, requests should go to the price api on
the current chain.

## **Screenshots/Recordings**

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before and after of your change. -->

### **Before**

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### **After**

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## **Pre-merge author checklist**

- [ ] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask
Extension Coding
Standards](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/CODING_GUIDELINES.md).
- [ ] I've completed the PR template to the best of my ability
- [ ] I’ve included tests if applicable
- [ ] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [ ] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.

test/e2e/tests/privacy/onboarding-token-price-call-privacy.spec.ts

@@ -21,13 +21,6 @@ async function mockTokenPriceApi(
         statusCode: 200,
         json: {},
       })),
-    // linea
-    await mockServer
-      .forGet('https://price.api.cx.metamask.io/v2/chains/59144/spot-prices')
-      .thenCallback(() => ({
-        statusCode: 200,
-        json: {},
-      })),
   ];
 }
 

ui/hooks/useTokenDetectionPolling.ts

@@ -1,5 +1,6 @@
 import { useSelector } from 'react-redux';
 import {
+  getCurrentChainId,
   getNetworkConfigurationsByChainId,
   getUseTokenDetection,
 } from '../selectors';
@@ -17,14 +18,19 @@ const useTokenDetectionPolling = () => {
   const useTokenDetection = useSelector(getUseTokenDetection);
   const completedOnboarding = useSelector(getCompletedOnboarding);
   const isUnlocked = useSelector(getIsUnlocked);
+  const currentChainId = useSelector(getCurrentChainId);
   const networkConfigurations = useSelector(getNetworkConfigurationsByChainId);
 
   const enabled = completedOnboarding && isUnlocked && useTokenDetection;
 
+  const chainIds = process.env.PORTFOLIO_VIEW
+    ? Object.keys(networkConfigurations)
+    : [currentChainId];
+
   useMultiPolling({
     startPolling: tokenDetectionStartPolling,
     stopPollingByPollingToken: tokenDetectionStopPollingByPollingToken,
-    input: enabled ? [Object.keys(networkConfigurations)] : [],
+    input: enabled ? [chainIds] : [],
   });
 
   return {};

ui/hooks/useTokenRatesPolling.ts

@@ -1,5 +1,6 @@
 import { useSelector } from 'react-redux';
 import {
+  getCurrentChainId,
   getMarketData,
   getNetworkConfigurationsByChainId,
   getTokenExchangeRates,
@@ -16,10 +17,11 @@ import {
 } from '../ducks/metamask/metamask';
 import useMultiPolling from './useMultiPolling';
 
-const useTokenRatesPolling = ({ chainIds }: { chainIds?: string[] } = {}) => {
+const useTokenRatesPolling = () => {
   // Selectors to determine polling input
   const completedOnboarding = useSelector(getCompletedOnboarding);
   const isUnlocked = useSelector(getIsUnlocked);
+  const currentChainId = useSelector(getCurrentChainId);
   const useCurrencyRateCheck = useSelector(getUseCurrencyRateCheck);
   const networkConfigurations = useSelector(getNetworkConfigurationsByChainId);
 
@@ -30,10 +32,14 @@ const useTokenRatesPolling = ({ chainIds }: { chainIds?: string[] } = {}) => {
 
   const enabled = completedOnboarding && isUnlocked && useCurrencyRateCheck;
 
+  const chainIds = process.env.PORTFOLIO_VIEW
+    ? Object.keys(networkConfigurations)
+    : [currentChainId];
+
   useMultiPolling({
     startPolling: tokenRatesStartPolling,
     stopPollingByPollingToken: tokenRatesStopPollingByPollingToken,
-    input: enabled ? chainIds ?? Object.keys(networkConfigurations) : [],
+    input: enabled ? chainIds : [],
   });
 
   return {