feat(network-controller): connect NetworkController to ConnectivityController

[cryptodev-2s]

Explanation

Connects NetworkController to ConnectivityController to prevent retries and suppress RPC endpoint error events when the user is offline.

Changes

• The NetworkController now depends on the ConnectivityController to prevent retries and suppress events when the user is offline.
• When offline, NetworkController:rpcEndpointUnavailable and NetworkController:rpcEndpointDegraded events are suppressed since retries don't occur and circuit breakers don't trigger.

Breaking Changes

• BREAKING: NetworkController now requires ConnectivityController:getState action handler to be registered on the messenger
  • You must register a ConnectivityController:getState action handler on your root messenger that returns an object with a connectivityStatus property ('online' or 'offline').
  • You must delegate the ConnectivityController:getState action from your root messenger to the NetworkControllerMessenger using rootMessenger.delegate({ messenger: networkControllerMessenger, actions: ['ConnectivityController:getState'] }).

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

---

Note

Overview

Connects NetworkController to ConnectivityController so RPC retries are prevented when offline and related events are suppressed.

• Adds dependency on @metamask/connectivity-controller; updates README dependency graph
• Wires connectivity via messenger (ConnectivityController:getState) and propagates isOffline to RpcService/RpcServiceChain
• When offline: do not retry RPC requests; suppress NetworkController:rpcEndpointUnavailable and NetworkController:rpcEndpointDegraded

Breaking change

• Requires registering and delegating ConnectivityController:getState on the root messenger to the NetworkControllerMessenger

Tests

• Updates and adds tests to cover offline behavior and event suppression; plumbs isOffline through existing tests

^{Written by Cursor Bugbot for commit a0ee480. This will update automatically on new commits. Configure here.}

[cryptodev-2s]

@metamaskbot publish-preview

[cryptodev-2s]

@metamaskbot publish-preview

[cryptodev-2s]

@metamaskbot publish-preview

[cryptodev-2s]

@metamaskbot publish-preview

[mcmire]

Had some comments, but they are minor. This looks good in general.

[cryptodev-2s]

@metamaskbot publish-preview

[mcmire]

LGTM!