feat: Improve provider method metrics for add/switch chain (#28214)

## **Description**

The provider metrics for `wallet_addEthereumChain` and
`wallet_switchEthereumChain` are tracked more effectively now. They are
no longer rate-limited to 0.1%, instead we track 100% of these calls.
They also now include the chain ID being added or switched to.

It was deemed safe to disable rate limiting here because historically
these methods have required user confirmation, so it's not likely that a
dapp would send them repeatedly in a short time frame. Volume should be
on a similar scale to other manual user confirmations like signatures.

[![Open in GitHub
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## **Related issues**

Fixes MetaMask/MetaMask-planning#3520

## **Manual testing steps**

* Build the wallet using the instructions listed here for debugging with
the mock Segment API:
https://github.com/MetaMask/metamask-extension/blob/develop/development/README.md#debugging-with-the-mock-segment-api
* Connect to the test-dapp
* Trigger `wallet_addEthereumChain` and `wallet_switchEthereumChain`,
and see that they are correctly captured as metric events.

## **Screenshots/Recordings**

<!-- If applicable, add screenshots and/or recordings to visualize the
before and after of your change. -->

### **Before**

N/A

### **After**


https://github.com/user-attachments/assets/910a1572-74fa-4ecf-8a5d-6f0856757207

Unfortunately the mock Segment server doesn't show the parameters. But
it does show that the event was received.

## **Pre-merge author checklist**

- [x] 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).
- [x] I've completed the PR template to the best of my ability
- [x] I’ve included tests if applicable
- [x] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] 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.

app/scripts/lib/createRPCMethodTrackingMiddleware.js

@@ -53,6 +53,8 @@ const RATE_LIMIT_MAP = {
   [MESSAGE_TYPE.ETH_DECRYPT]: RATE_LIMIT_TYPES.NON_RATE_LIMITED,
   [MESSAGE_TYPE.ETH_GET_ENCRYPTION_PUBLIC_KEY]:
     RATE_LIMIT_TYPES.NON_RATE_LIMITED,
+  [MESSAGE_TYPE.ADD_ETHEREUM_CHAIN]: RATE_LIMIT_TYPES.NON_RATE_LIMITED,
+  [MESSAGE_TYPE.SWITCH_ETHEREUM_CHAIN]: RATE_LIMIT_TYPES.NON_RATE_LIMITED,
   [MESSAGE_TYPE.ETH_REQUEST_ACCOUNTS]: RATE_LIMIT_TYPES.TIMEOUT,
   [MESSAGE_TYPE.WALLET_REQUEST_PERMISSIONS]: RATE_LIMIT_TYPES.TIMEOUT,
   [MESSAGE_TYPE.SEND_METADATA]: RATE_LIMIT_TYPES.BLOCKED,
@@ -126,6 +128,8 @@ const EVENT_NAME_MAP = {
  */
 const TRANSFORM_PARAMS_MAP = {
   [MESSAGE_TYPE.WATCH_ASSET]: ({ type }) => ({ type }),
+  [MESSAGE_TYPE.ADD_ETHEREUM_CHAIN]: ([{ chainId }]) => ({ chainId }),
+  [MESSAGE_TYPE.SWITCH_ETHEREUM_CHAIN]: ([{ chainId }]) => ({ chainId }),
 };
 
 const rateLimitTimeoutsByMethod = {};

app/scripts/lib/createRPCMethodTrackingMiddleware.test.js

@@ -883,6 +883,34 @@ describe('createRPCMethodTrackingMiddleware', () => {
         },
         { type: 'ERC20' },
       ],
+      [
+        'only the chain ID',
+        'wallet_addEthereumChain',
+        [
+          {
+            chainId: '0x64',
+            chainName: 'Gnosis',
+            rpcUrls: ['https://rpc.gnosischain.com'],
+            iconUrls: [
+              'https://xdaichain.com/fake/example/url/xdai.svg',
+              'https://xdaichain.com/fake/example/url/xdai.png',
+            ],
+            nativeCurrency: {
+              name: 'XDAI',
+              symbol: 'XDAI',
+              decimals: 18,
+            },
+            blockExplorerUrls: ['https://blockscout.com/poa/xdai/'],
+          },
+        ],
+        { chainId: '0x64' },
+      ],
+      [
+        'only the chain ID',
+        'wallet_switchEthereumChain',
+        [{ chainId: '0x123' }],
+        { chainId: '0x123' },
+      ],
     ])(
       `should include %s in the '%s' tracked events params property`,
       async (_, method, params, expected) => {