Upgrade obs-store and fix memory leaks

app/scripts/metamask-controller.js

@@ -177,7 +177,7 @@ module.exports = class MetamaskController extends EventEmitter {
       blockTracker: this.blockTracker,
       getGasPrice: this.getGasPrice.bind(this),
     })
-    this.txController.on('newUnapprovedTx', opts.showUnapprovedTx.bind(opts))
+    this.txController.on('newUnapprovedTx', () => opts.showUnapprovedTx())
 
     this.txController.on(`tx:status-update`, (txId, status) => {
       if (status === 'confirmed' || status === 'failed') {
@@ -1229,8 +1229,10 @@ module.exports = class MetamaskController extends EventEmitter {
     )
     dnode.on('remote', (remote) => {
       // push updates to popup
-      const sendUpdate = remote.sendUpdate.bind(remote)
+      const sendUpdate = (update) => remote.sendUpdate(update)
       this.on('update', sendUpdate)
+      // remove update listener once the connection ends
+      dnode.on('end', () => this.removeListener('update', sendUpdate))
     })
   }
 
@@ -1280,10 +1282,12 @@ module.exports = class MetamaskController extends EventEmitter {
    * @param {*} outStream - The stream to provide public config over.
    */
   setupPublicConfig (outStream) {
+    const configStream = asStream(this.publicConfigStore)
     pump(
-      asStream(this.publicConfigStore),
+      configStream,
       outStream,
       (err) => {
+        configStream.destroy()
         if (err) log.error(err)
       }
     )

package-lock.json

@@ -21822,9 +21822,9 @@
       }
     },
     "obs-store": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/obs-store/-/obs-store-3.0.0.tgz",
-      "integrity": "sha512-ZHK0fwDZEecEvdiqQGnxrEshbqibVgsq4aIIe/5PIT8fGGprTTuGw1RXLMy5G1VN/KtnmEP6+n+aLH7BYuYCVA==",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/obs-store/-/obs-store-3.0.2.tgz",
+      "integrity": "sha512-GzBr7KM2TYWoJSlF3sVo1cMIOeyxgXpEdegXLZyYONRpunFHsBdKwOba0ki17kN2stLaEwTNolJChGHafqM7Fw==",
       "requires": {
         "babel-preset-es2015": "^6.22.0",
         "babelify": "^7.3.0",
@@ -21835,7 +21835,7 @@
       "dependencies": {
         "babelify": {
           "version": "7.3.0",
-          "resolved": "https://registry.npmjs.org/babelify/-/babelify-7.3.0.tgz",
+          "resolved": "http://registry.npmjs.org/babelify/-/babelify-7.3.0.tgz",
           "integrity": "sha1-qlau3nBn/XvVSWZu4W3ChQh+iOU=",
           "requires": {
             "babel-core": "^6.0.14",

package.json

@@ -169,7 +169,7 @@
     "multiplex": "^6.7.0",
     "number-to-bn": "^1.7.0",
     "obj-multiplex": "^1.0.0",
-    "obs-store": "^3.0.0",
+    "obs-store": "^3.0.2",
     "percentile": "^1.2.0",
     "pify": "^3.0.0",
     "ping-pong-stream": "^1.0.0",