Fix issues

app/scripts/controllers/network/createInfuraClient.js

@@ -10,8 +10,6 @@ import {
 
 import { createInfuraMiddleware } from '@metamask/eth-json-rpc-infura';
 import { PollingBlockTracker } from 'eth-block-tracker';
-import createFilterMiddleware from 'eth-json-rpc-filters';
-import createSubscriptionManager from 'eth-json-rpc-filters/subscriptionManager';
 
 import { BUILT_IN_NETWORKS } from '../../../../shared/constants/network';
 
@@ -25,15 +23,6 @@ export default function createInfuraClient({ network, projectId }) {
   const infuraProvider = providerFromMiddleware(infuraMiddleware);
   const blockTracker = new PollingBlockTracker({ provider: infuraProvider });
 
-  const filterMiddleware = createFilterMiddleware({
-    infuraProvider,
-    blockTracker,
-  });
-  const subscriptionManager = createSubscriptionManager({
-    infuraProvider,
-    blockTracker,
-  });
-
   const networkMiddleware = mergeMiddleware([
     createNetworkAndChainIdMiddleware({ network }),
     createBlockCacheMiddleware({ blockTracker }),
@@ -42,10 +31,8 @@ export default function createInfuraClient({ network, projectId }) {
     createRetryOnEmptyMiddleware({ blockTracker, provider: infuraProvider }),
     createBlockTrackerInspectorMiddleware({ blockTracker }),
     infuraMiddleware,
-    filterMiddleware,
-    subscriptionManager.middleware,
   ]);
-  return { networkMiddleware, blockTracker, subscriptionManager };
+  return { networkMiddleware, blockTracker };
 }
 
 function createNetworkAndChainIdMiddleware({ network }) {

app/scripts/controllers/network/createJsonRpcClient.js

@@ -8,8 +8,6 @@ import {
   providerFromMiddleware,
 } from 'eth-json-rpc-middleware';
 import { PollingBlockTracker } from 'eth-block-tracker';
-import createFilterMiddleware from 'eth-json-rpc-filters';
-import createSubscriptionManager from 'eth-json-rpc-filters/subscriptionManager';
 import { SECOND } from '../../../../shared/constants/time';
 
 const inTest = process.env.IN_TEST;
@@ -21,21 +19,11 @@ const getTestMiddlewares = () => {
 export default function createJsonRpcClient({ rpcUrl, chainId }) {
   const fetchMiddleware = createFetchMiddleware({ rpcUrl });
   const blockProvider = providerFromMiddleware(fetchMiddleware);
-
   const blockTracker = new PollingBlockTracker({
     ...blockTrackerOpts,
     provider: blockProvider,
   });
 
-  const filterMiddleware = createFilterMiddleware({
-    blockProvider,
-    blockTracker,
-  });
-  const subscriptionManager = createSubscriptionManager({
-    blockProvider,
-    blockTracker,
-  });
-
   const networkMiddleware = mergeMiddleware([
     ...getTestMiddlewares(),
     createChainIdMiddleware(chainId),
@@ -44,11 +32,9 @@ export default function createJsonRpcClient({ rpcUrl, chainId }) {
     createInflightCacheMiddleware(),
     createBlockTrackerInspectorMiddleware({ blockTracker }),
     fetchMiddleware,
-    filterMiddleware,
-    subscriptionManager.middleware,
   ]);
 
-  return { networkMiddleware, blockTracker, subscriptionManager };
+  return { networkMiddleware, blockTracker };
 }
 
 function createChainIdMiddleware(chainId) {

app/scripts/controllers/network/network.js

@@ -2,13 +2,18 @@ import { strict as assert } from 'assert';
 import EventEmitter from 'events';
 import { ComposedStore, ObservableStore } from '@metamask/obs-store';
 import { JsonRpcEngine } from 'json-rpc-engine';
-import { providerFromEngine } from 'eth-json-rpc-middleware';
+import {
+  providerFromEngine,
+  providerFromMiddleware,
+} from 'eth-json-rpc-middleware';
 import log from 'loglevel';
 import {
   createSwappableProxy,
   createEventEmitterProxy,
 } from 'swappable-obj-proxy';
 import EthQuery from 'eth-query';
+import createFilterMiddleware from 'eth-json-rpc-filters';
+import createSubscriptionManager from 'eth-json-rpc-filters/subscriptionManager';
 import {
   INFURA_PROVIDER_TYPES,
   BUILT_IN_NETWORKS,
@@ -424,19 +429,31 @@ export default class NetworkController extends EventEmitter {
     this._setNetworkClient(networkClient);
   }
 
-  _setNetworkClient({ networkMiddleware, blockTracker, subscriptionManager }) {
+  _setNetworkClient({ networkMiddleware, blockTracker }) {
+    const networkProvider = providerFromMiddleware(networkMiddleware);
+    const filterMiddleware = createFilterMiddleware({
+      provider: networkProvider,
+      blockTracker,
+    });
+    const subscriptionManager = createSubscriptionManager({
+      provider: networkProvider,
+      blockTracker,
+    });
     const metamaskMiddleware = createMetamaskMiddleware(
       this._baseProviderParams,
     );
-    const engine = new JsonRpcEngine();
 
+    const engine = new JsonRpcEngine();
     subscriptionManager.events.on('notification', (message) =>
       engine.emit('notification', message),
     );
-
+    engine.push(filterMiddleware);
+    engine.push(subscriptionManager.middleware);
     engine.push(metamaskMiddleware);
     engine.push(networkMiddleware);
+
     const provider = providerFromEngine(engine);
+
     this._setProviderAndBlockTracker({ provider, blockTracker });
   }
 

app/scripts/controllers/permissions/specifications.js

@@ -260,10 +260,12 @@ export const unrestrictedMethods = Object.freeze([
   'eth_signTypedData_v1',
   'eth_signTypedData_v3',
   'eth_signTypedData_v4',
+  'eth_subscribe',
   'eth_submitHashrate',
   'eth_submitWork',
   'eth_syncing',
   'eth_uninstallFilter',
+  'eth_unsubscribe',
   'metamask_getProviderState',
   'metamask_watchAsset',
   'net_listening',

app/scripts/metamask-controller.js

@@ -3732,9 +3732,19 @@ export default class MetamaskController extends EventEmitter {
    * @param {tabId} [options.tabId] - The tab ID of the sender - if the sender is within a tab
    */
   setupProviderEngine({ origin, subjectType, sender, tabId }) {
+    const { provider } = this;
+
     // setup json rpc engine stack
     const engine = new JsonRpcEngine();
-    const { provider } = this;
+
+    // forward notifications from network provider
+    provider.on('data', (error, message) => {
+      if (error) {
+        // This should never happen, this error parameter is never set
+        throw error;
+      }
+      engine.emit('notification', message);
+    });
 
     if (isManifestV3) {
       engine.push(createDupeReqFilterMiddleware());