fix: Delete invalid SelectedNetworkController state (#26428)

## **Description**

The `SelectedNetworkController` state is cleared if any invalid
`networkConfigurationId`s are found in state. We are seeing reports of
this happening in production in v12.0.1.

The suspected cause is `NetworkController` state corruption. We resolved
a few cases of this in v12.0.1, but for users that were affected by
this, the invalid IDs may have propogated to the
`SelectedNetworkController` state already. That is what this migration
intends to fix.

[![Open in GitHub
Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/MetaMask/metamask-extension/pull/26428?quickstart=1)

## **Related issues**

Fixes #26309

## **Manual testing steps**

We don't have clear reproduction steps for the bug itself. To
artificially reproduce the scenario by changing extension state, this
should work:

* Create a dev build from v12.0.2
* Install the dev build from the `dist/chrome` directory and proceed
through onboarding
* Visit the test dapp, refresh, and connect to it.
* Run this command in the background console:
  ```
  chrome.storage.local.get(
    null,
    (state) => {

state.data.SelectedNetworkController.domains['https://metamask.github.io']
= '123';
      chrome.storage.local.set(state, () => chrome.runtime.reload());
    }
  );
  ```
  * The linked error should now appear in the console of the popup
* Disable the extension
* Switch to this branch and create a dev build
* Enable and reload the extension
  * The error should no longer appear.

## **Screenshots/Recordings**

N/A

## **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/migrations/120.5.test.ts

@@ -0,0 +1,255 @@
+import { cloneDeep } from 'lodash';
+import { migrate, version } from './120.5';
+
+const oldVersion = 120.4;
+
+describe('migration #120.5', () => {
+  afterEach(() => {
+    jest.resetAllMocks();
+  });
+
+  it('updates the version metadata', async () => {
+    const oldStorage = {
+      meta: { version: oldVersion },
+      data: {},
+    };
+
+    const newStorage = await migrate(cloneDeep(oldStorage));
+
+    expect(newStorage.meta).toStrictEqual({ version });
+  });
+
+  it('does nothing if SelectedNetworkController state is not set', async () => {
+    const oldState = {
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual(oldState);
+  });
+
+  it('deletes the SelectedNetworkController state if it is corrupted', async () => {
+    const oldState = {
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+      SelectedNetworkController: 'invalid',
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual({
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+    });
+  });
+
+  it('deletes the SelectedNetworkController state if it is missing the domains state', async () => {
+    const oldState = {
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+      SelectedNetworkController: {
+        somethingElse: {},
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual({
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+    });
+  });
+
+  it('deletes the SelectedNetworkController state if the domains state is corrupted', async () => {
+    const oldState = {
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+      SelectedNetworkController: {
+        domains: 'invalid',
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual({
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+    });
+  });
+
+  it('deletes the SelectedNetworkController state if NetworkController state is missing', async () => {
+    const oldState = {
+      SelectedNetworkController: {
+        domains: {},
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual({});
+  });
+
+  it('deletes the SelectedNetworkController state if NetworkController state is corrupted', async () => {
+    const oldState = {
+      NetworkController: 'invalid',
+      SelectedNetworkController: {
+        domains: {},
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual({
+      NetworkController: 'invalid',
+    });
+  });
+
+  it('deletes the SelectedNetworkController state if NetworkController has no networkConfigurations', async () => {
+    const oldState = {
+      NetworkController: {},
+      SelectedNetworkController: {
+        domains: {},
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual({
+      NetworkController: {},
+    });
+  });
+
+  it('deletes the SelectedNetworkController state if NetworkController networkConfigurations state is corrupted', async () => {
+    const oldState = {
+      NetworkController: { networkConfigurations: 'invalid' },
+      SelectedNetworkController: {
+        domains: {},
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual({
+      NetworkController: { networkConfigurations: 'invalid' },
+    });
+  });
+
+  it('does nothing if SelectedNetworkController domains state is empty', async () => {
+    const oldState = {
+      NetworkController: { networkConfigurations: {} },
+      SelectedNetworkController: {
+        domains: {},
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual(oldState);
+  });
+
+  it('does nothing if SelectedNetworkController domains state is valid', async () => {
+    const oldState = {
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+      SelectedNetworkController: {
+        domains: {
+          'example1.test': '123',
+          'example2.test': 'mainnet',
+          'example3.test': 'goerli',
+          'example4.test': 'sepolia',
+          'example5.test': 'linea-goerli',
+          'example6.test': 'linea-sepolia',
+          'example7.test': 'linea-mainnet',
+        },
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual(oldState);
+  });
+
+  it('deletes the SelectedNetworkController state if an invalid networkConfigurationId is found', async () => {
+    const oldState = {
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+      SelectedNetworkController: {
+        domains: {
+          'domain.test': '456',
+        },
+      },
+    };
+
+    const transformedState = await migrate({
+      meta: { version: oldVersion },
+      data: cloneDeep(oldState),
+    });
+
+    expect(transformedState.data).toEqual({
+      NetworkController: {
+        networkConfigurations: {
+          123: {},
+        },
+      },
+    });
+  });
+});

app/scripts/migrations/120.5.ts

@@ -0,0 +1,126 @@
+import { hasProperty, isObject } from '@metamask/utils';
+import { cloneDeep } from 'lodash';
+
+type VersionedData = {
+  meta: { version: number };
+  data: Record<string, unknown>;
+};
+
+export const version = 120.5;
+
+/**
+ * This migration removes invalid network configuration IDs from the SelectedNetworkController.
+ *
+ * @param originalVersionedData - Versioned MetaMask extension state, exactly
+ * what we persist to dist.
+ * @param originalVersionedData.meta - State metadata.
+ * @param originalVersionedData.meta.version - The current state version.
+ * @param originalVersionedData.data - The persisted MetaMask state, keyed by
+ * controller.
+ * @returns Updated versioned MetaMask extension state.
+ */
+export async function migrate(
+  originalVersionedData: VersionedData,
+): Promise<VersionedData> {
+  const versionedData = cloneDeep(originalVersionedData);
+  versionedData.meta.version = version;
+  transformState(versionedData.data);
+  return versionedData;
+}
+
+/**
+ * A list of InfuraNetworkType values from extension v12.0.1
+ * This version of the extension uses `@metamask/[email protected]`, which in turn uses
+ * the types from `@metamask/[email protected]`
+ *
+ * See https://github.com/MetaMask/core/blob/34542cf6e808f294fd83c7c5f70d1bc7418f8a9e/packages/controller-utils/src/types.ts#L4
+ *
+ * Hard-coded here rather than imported so that this migration continues to work correctly as these
+ * constants get updated in the future.
+ */
+const infuraNetworkTypes = [
+  'mainnet',
+  'goerli',
+  'sepolia',
+  'linea-goerli',
+  'linea-sepolia',
+  'linea-mainnet',
+];
+
+/**
+ * Remove invalid network configuration IDs from the SelectedNetworkController.
+ *
+ * @param state - The persisted MetaMask state, keyed by controller.
+ */
+function transformState(state: Record<string, unknown>): void {
+  if (!hasProperty(state, 'SelectedNetworkController')) {
+    return;
+  }
+  if (!isObject(state.SelectedNetworkController)) {
+    console.error(
+      `Migration ${version}: Invalid SelectedNetworkController state of type '${typeof state.SelectedNetworkController}'`,
+    );
+    delete state.SelectedNetworkController;
+    return;
+  } else if (!hasProperty(state.SelectedNetworkController, 'domains')) {
+    console.error(
+      `Migration ${version}: Missing SelectedNetworkController domains state`,
+    );
+    delete state.SelectedNetworkController;
+    return;
+  } else if (!isObject(state.SelectedNetworkController.domains)) {
+    console.error(
+      `Migration ${version}: Invalid SelectedNetworkController domains state of type '${typeof state
+        .SelectedNetworkController.domains}'`,
+    );
+    delete state.SelectedNetworkController;
+    return;
+  }
+
+  if (!hasProperty(state, 'NetworkController')) {
+    delete state.SelectedNetworkController;
+    return;
+  } else if (!isObject(state.NetworkController)) {
+    console.error(
+      new Error(
+        `Migration ${version}: Invalid NetworkController state of type '${typeof state.NetworkController}'`,
+      ),
+    );
+    delete state.SelectedNetworkController;
+    return;
+  } else if (!hasProperty(state.NetworkController, 'networkConfigurations')) {
+    delete state.SelectedNetworkController;
+    return;
+  } else if (!isObject(state.NetworkController.networkConfigurations)) {
+    console.error(
+      new Error(
+        `Migration ${version}: Invalid NetworkController networkConfigurations state of type '${typeof state.NetworkController}'`,
+      ),
+    );
+    delete state.SelectedNetworkController;
+    return;
+  }
+
+  const validNetworkConfigurationIds = [
+    ...infuraNetworkTypes,
+    ...Object.keys(state.NetworkController.networkConfigurations),
+  ];
+  const domainMappedNetworkConfigurationIds = Object.values(
+    state.SelectedNetworkController.domains,
+  );
+
+  for (const configurationId of domainMappedNetworkConfigurationIds) {
+    if (
+      typeof configurationId !== 'string' ||
+      !validNetworkConfigurationIds.includes(configurationId)
+    ) {
+      console.error(
+        new Error(
+          `Migration ${version}: Invalid networkConfigurationId found in SelectedNetworkController state: '${configurationId}'`,
+        ),
+      );
+      delete state.SelectedNetworkController;
+      return;
+    }
+  }
+}