Send metrics event from backend for on chain transaction failures (#6500)

* Send metrics event from backend for on chain transaction failures

* Passes state object to backEndMetaMetricsEvent, and adds getMetaMetricState selector

3 files changed, 52 insertions, 1 deletions

diff --git a/app/scripts/controllers/preferences.js b/app/scripts/controllers/preferences.js
index 737411890..9fe8bee4b 100644
--- a/app/scripts/controllers/preferences.js
+++ b/app/scripts/controllers/preferences.js
@@ -117,6 +117,14 @@ class PreferencesController {
     return metaMetricsId
   }
 
+  getMetaMetricsId () {
+    return this.store.getState().metaMetricsId
+  }
+
+  getParticipateInMetaMetrics () {
+    return this.store.getState().participateInMetaMetrics
+  }
+
   setMetaMetricsSendCount (val) {
     this.store.updateState({ metaMetricsSendCount: val })
   }
diff --git a/app/scripts/lib/backend-metametrics.js b/app/scripts/lib/backend-metametrics.js
new file mode 100644
index 000000000..e3c163c1a
--- /dev/null
+++ b/app/scripts/lib/backend-metametrics.js
@@ -0,0 +1,26 @@
+const {
+  getMetaMetricState,
+} = require('../../../ui/app/selectors/selectors')
+const {
+  sendMetaMetricsEvent,
+} = require('../../../ui/app/helpers/utils/metametrics.util')
+
+const inDevelopment = process.env.NODE_ENV === 'development'
+
+const METAMETRICS_TRACKING_URL = inDevelopment
+  ? 'http://www.metamask.io/metametrics'
+  : 'http://www.metamask.io/metametrics-prod'
+
+function backEndMetaMetricsEvent (metaMaskState, eventData) {
+  const stateEventData = getMetaMetricState({ metamask: metaMaskState })
+
+  if (stateEventData.participateInMetaMetrics) {
+      sendMetaMetricsEvent({
+        ...stateEventData,
+        ...eventData,
+        url: METAMETRICS_TRACKING_URL + '/backend',
+      })
+  }
+}
+
+module.exports = backEndMetaMetricsEvent
diff --git a/app/scripts/metamask-controller.js b/app/scripts/metamask-controller.js
index 0506e3116..be2090f63 100644
--- a/app/scripts/metamask-controller.js
+++ b/app/scripts/metamask-controller.js
@@ -54,6 +54,7 @@ const EthQuery = require('eth-query')
 const ethUtil = require('ethereumjs-util')
 const sigUtil = require('eth-sig-util')
 const { AddressBookController } = require('gaba')
+const backEndMetaMetricsEvent = require('./lib/backend-metametrics')
 
 
 module.exports = class MetamaskController extends EventEmitter {
@@ -190,10 +191,26 @@ module.exports = class MetamaskController extends EventEmitter {
     })
     this.txController.on('newUnapprovedTx', () => opts.showUnapprovedTx())
 
-    this.txController.on(`tx:status-update`, (txId, status) => {
+    this.txController.on(`tx:status-update`, async (txId, status) => {
       if (status === 'confirmed' || status === 'failed') {
         const txMeta = this.txController.txStateManager.getTx(txId)
         this.platform.showTransactionNotification(txMeta)
+
+        const { txReceipt } = txMeta
+        const participateInMetaMetrics = this.preferencesController.getParticipateInMetaMetrics()
+        if (txReceipt && txReceipt.status === '0x0' && participateInMetaMetrics) {
+          const metamaskState = await this.getState()
+          backEndMetaMetricsEvent(metamaskState, {
+            customVariables: {
+              errorMessage: txMeta.simulationFails.reason,
+            },
+            eventOpts: {
+              category: 'backend',
+              action: 'Transactions',
+              name: 'On Chain Failure',
+            },
+          })
+        }
       }
     })