Only resolve ENS on mainnet (#7944)

The ENS resolver will now bail on any network other than mainnet.

app/scripts/background.js

@@ -251,7 +251,10 @@ function setupController (initState, initLangCode) {
   })
 
   const provider = controller.provider
-  setupEnsIpfsResolver({ provider })
+  setupEnsIpfsResolver({
+    getCurrentNetwork: controller.getCurrentNetwork,
+    provider,
+  })
 
   // submit rpc requests to mesh-metrics
   controller.networkController.on('rpc-req', (data) => {

app/scripts/lib/ens-ipfs/setup.js

@@ -6,7 +6,7 @@ const supportedTopLevelDomains = ['eth']
 
 module.exports = setupEnsIpfsResolver
 
-function setupEnsIpfsResolver ({ provider }) {
+function setupEnsIpfsResolver ({ provider, getCurrentNetwork }) {
 
   // install listener
   const urlPatterns = supportedTopLevelDomains.map(tld => `*://*.${tld}/*`)
@@ -23,7 +23,10 @@ function setupEnsIpfsResolver ({ provider }) {
   async function webRequestDidFail (details) {
     const { tabId, url } = details
     // ignore requests that are not associated with tabs
-    if (tabId === -1) return
+    // only attempt ENS resolution on mainnet
+    if (tabId === -1 || getCurrentNetwork() !== '1') {
+      return
+    }
     // parse ens name
     const urlData = urlUtil.parse(url)
     const { hostname: name, path, search, hash: fragment } = urlData

app/scripts/metamask-controller.js

@@ -675,6 +675,10 @@ module.exports = class MetamaskController extends EventEmitter {
     })
   }
 
+  getCurrentNetwork = () => {
+    return this.networkController.store.getState().network
+  }
+
   /**
    * Collects all the information that we want to share
    * with the mobile client for syncing purposes