From 944f23207d3e8b1c7fe02470218883d91d6a06f6 Mon Sep 17 00:00:00 2001
From: Patryk Lucka <5708018+PatrykLucka@users.noreply.github.com>
Date: Wed, 3 Dec 2025 16:02:36 +0100
Subject: [PATCH] refactor: update network switching metrics to include chain
 ID and custom network status

---
 .../network-list-menu/network-list-menu.tsx   | 31 ++++++++++++++++++-
 .../hooks/useNetworkChangeHandlers.ts         | 30 ++++++++++++++++++
 .../confirmation/confirmation.js              | 25 ++++++++++++++-
 3 files changed, 84 insertions(+), 2 deletions(-)

diff --git a/ui/components/multichain/network-list-menu/network-list-menu.tsx b/ui/components/multichain/network-list-menu/network-list-menu.tsx
index 966267f6ed20..1773c0985fc8 100644
--- a/ui/components/multichain/network-list-menu/network-list-menu.tsx
+++ b/ui/components/multichain/network-list-menu/network-list-menu.tsx
@@ -54,8 +54,12 @@ import {
   FEATURED_RPCS,
   TEST_CHAINS,
   CHAIN_ID_PORTFOLIO_LANDING_PAGE_URL_MAP,
+  BUILT_IN_NETWORKS,
 } from '../../../../shared/constants/network';
-import { MULTICHAIN_NETWORK_TO_ACCOUNT_TYPE_NAME } from '../../../../shared/constants/multichain/networks';
+import {
+  MULTICHAIN_NETWORK_TO_ACCOUNT_TYPE_NAME,
+  MultichainNetworks,
+} from '../../../../shared/constants/multichain/networks';
 import {
   getShowTestNetworks,
   getOriginOfCurrentTab,
@@ -423,6 +427,28 @@ export const NetworkListMenu = ({ onClose }: NetworkListMenuProps) => {
       ? convertCaipToHexChainId(currentChainId)
       : currentChainId;
 
+    // Check if the destination network is custom (not built-in, featured, or multichain)
+    const hexChainId = chain.isEvm
+      ? convertCaipToHexChainId(chain.chainId)
+      : chain.chainId;
+
+    const isBuiltInNetwork = Object.values(BUILT_IN_NETWORKS).some(
+      (builtInNetwork) => builtInNetwork.chainId === hexChainId,
+    );
+    const isFeaturedRpc = FEATURED_RPCS.some(
+      (featuredRpc) => featuredRpc.chainId === hexChainId,
+    );
+    const isMultichainProviderConfig = Object.values(MultichainNetworks).some(
+      (multichainNetwork) =>
+        multichainNetwork === chain.chainId ||
+        (chain.isEvm
+          ? convertCaipToHexChainId(chain.chainId)
+          : chain.chainId) === multichainNetwork,
+    );
+
+    const isCustomNetwork =
+      !isBuiltInNetwork && !isFeaturedRpc && !isMultichainProviderConfig;
+
     trackEvent({
       event: MetaMetricsEventName.NavNetworkSwitched,
       category: MetaMetricsEventCategory.Network,
@@ -437,6 +463,9 @@ export const NetworkListMenu = ({ onClose }: NetworkListMenuProps) => {
         // TODO: Fix in https://github.com/MetaMask/metamask-extension/issues/31860
         // eslint-disable-next-line @typescript-eslint/naming-convention
         to_network: chainIdToTrack,
+        // TODO: Fix in https://github.com/MetaMask/metamask-extension/issues/31860
+        // eslint-disable-next-line @typescript-eslint/naming-convention
+        custom_network: isCustomNetwork,
       },
     });
   };
diff --git a/ui/components/multichain/network-manager/hooks/useNetworkChangeHandlers.ts b/ui/components/multichain/network-manager/hooks/useNetworkChangeHandlers.ts
index daf495fa0d8e..abd4f7f6fa3f 100644
--- a/ui/components/multichain/network-manager/hooks/useNetworkChangeHandlers.ts
+++ b/ui/components/multichain/network-manager/hooks/useNetworkChangeHandlers.ts
@@ -23,6 +23,11 @@ import {
   getSelectedMultichainNetworkChainId,
 } from '../../../../selectors';
 import { MetaMetricsContext } from '../../../../contexts/metametrics';
+import {
+  BUILT_IN_NETWORKS,
+  FEATURED_RPCS,
+} from '../../../../../shared/constants/network';
+import { MultichainNetworks } from '../../../../../shared/constants/multichain/networks';
 
 // TODO: Fix in https://github.com/MetaMask/metamask-extension/issues/31860
 // eslint-disable-next-line @typescript-eslint/naming-convention
@@ -143,6 +148,28 @@ export const useNetworkChangeHandlers = () => {
         ? convertCaipToHexChainId(currentChainId)
         : currentChainId;
 
+      // Check if the destination network is custom (not built-in, featured, or multichain)
+      const hexChainId = chain.isEvm
+        ? convertCaipToHexChainId(chain.chainId)
+        : chain.chainId;
+
+      const isBuiltInNetwork = Object.values(BUILT_IN_NETWORKS).some(
+        (builtInNetwork) => builtInNetwork.chainId === hexChainId,
+      );
+      const isFeaturedRpc = FEATURED_RPCS.some(
+        (featuredRpc) => featuredRpc.chainId === hexChainId,
+      );
+      const isMultichainProviderConfig = Object.values(MultichainNetworks).some(
+        (multichainNetwork) =>
+          multichainNetwork === chain.chainId ||
+          (chain.isEvm
+            ? convertCaipToHexChainId(chain.chainId)
+            : chain.chainId) === multichainNetwork,
+      );
+
+      const isCustomNetwork =
+        !isBuiltInNetwork && !isFeaturedRpc && !isMultichainProviderConfig;
+
       trackEvent({
         event: MetaMetricsEventName.NavNetworkSwitched,
         category: MetaMetricsEventCategory.Network,
@@ -157,6 +184,9 @@ export const useNetworkChangeHandlers = () => {
           // TODO: Fix in https://github.com/MetaMask/metamask-extension/issues/31860
           // eslint-disable-next-line @typescript-eslint/naming-convention
           to_network: chainIdToTrack,
+          // TODO: Fix in https://github.com/MetaMask/metamask-extension/issues/31860
+          // eslint-disable-next-line @typescript-eslint/naming-convention
+          custom_network: isCustomNetwork,
         },
       });
     },
diff --git a/ui/pages/confirmations/confirmation/confirmation.js b/ui/pages/confirmations/confirmation/confirmation.js
index 3c6b72af4943..a80ac8d59980 100644
--- a/ui/pages/confirmations/confirmation/confirmation.js
+++ b/ui/pages/confirmations/confirmation/confirmation.js
@@ -18,7 +18,12 @@ import {
   NETWORKS_BYPASSING_VALIDATION,
 } from '@metamask/controller-utils';
 import { DIALOG_APPROVAL_TYPES } from '@metamask/snaps-rpc-methods';
-import { CHAIN_SPEC_URL } from '../../../../shared/constants/network';
+import {
+  CHAIN_SPEC_URL,
+  BUILT_IN_NETWORKS,
+  FEATURED_RPCS,
+} from '../../../../shared/constants/network';
+import { MultichainNetworks } from '../../../../shared/constants/multichain/networks';
 import fetchWithCache from '../../../../shared/lib/fetch-with-cache';
 import {
   MetaMetricsEventCategory,
@@ -476,6 +481,23 @@ export default function ConfirmationPage({
       pendingConfirmation?.requestData?.fromNetworkConfiguration?.chainId &&
       pendingConfirmation?.requestData?.toNetworkConfiguration?.chainId
     ) {
+      // Check if the destination network is custom (not built-in, featured, or multichain)
+      const toChainId =
+        pendingConfirmation.requestData.toNetworkConfiguration.chainId;
+
+      const isBuiltInNetwork = Object.values(BUILT_IN_NETWORKS).some(
+        (builtInNetwork) => builtInNetwork.chainId === toChainId,
+      );
+      const isFeaturedRpc = FEATURED_RPCS.some(
+        (featuredRpc) => featuredRpc.chainId === toChainId,
+      );
+      const isMultichainProviderConfig = Object.values(MultichainNetworks).some(
+        (multichainNetwork) => multichainNetwork === toChainId,
+      );
+
+      const isCustomNetwork =
+        !isBuiltInNetwork && !isFeaturedRpc && !isMultichainProviderConfig;
+
       trackEvent({
         category: MetaMetricsEventCategory.Network,
         event: MetaMetricsEventName.NavNetworkSwitched,
@@ -485,6 +507,7 @@ export default function ConfirmationPage({
             pendingConfirmation.requestData.fromNetworkConfiguration.chainId,
           to_network:
             pendingConfirmation.requestData.toNetworkConfiguration.chainId,
+          custom_network: isCustomNetwork,
           referrer: {
             url: window.location.origin,
           },