From 1d23b59af3d67b76341cbc4365e33cbcbc2ece20 Mon Sep 17 00:00:00 2001
From: Brad Decker <git@braddecker.dev>
Date: Tue, 23 Feb 2021 09:58:35 -0600
Subject: [PATCH] add Custom Network Added event (#10484)

---
 app/scripts/controllers/metametrics.js        |  4 ++--
 .../handlers/add-ethereum-chain.js            | 22 +++++++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/app/scripts/controllers/metametrics.js b/app/scripts/controllers/metametrics.js
index 4bb1c4f46..00e07009f 100644
--- a/app/scripts/controllers/metametrics.js
+++ b/app/scripts/controllers/metametrics.js
@@ -200,9 +200,9 @@ export default class MetaMetricsController {
         value,
         currency,
         category,
-        network: this.network,
+        network: properties?.network ?? this.network,
         locale: this.locale,
-        chain_id: this.chainId,
+        chain_id: properties?.chain_id ?? this.chainId,
         environment_type: environmentType,
       },
       context: this._buildContext(referrer, page),
diff --git a/app/scripts/lib/rpc-method-middleware/handlers/add-ethereum-chain.js b/app/scripts/lib/rpc-method-middleware/handlers/add-ethereum-chain.js
index a797ccf3f..cb7b69f7c 100644
--- a/app/scripts/lib/rpc-method-middleware/handlers/add-ethereum-chain.js
+++ b/app/scripts/lib/rpc-method-middleware/handlers/add-ethereum-chain.js
@@ -26,6 +26,7 @@ async function addEthereumChainHandler(
     findCustomRpcBy,
     updateRpcTarget,
     requestUserApproval,
+    sendMetrics,
   },
 ) {
   if (!req.params?.[0] || typeof req.params[0] !== 'object') {
@@ -227,6 +228,27 @@ async function addEthereumChainHandler(
       }),
     );
 
+    sendMetrics({
+      event: 'Custom Network Added',
+      category: 'Network',
+      referrer: {
+        url: origin,
+      },
+      sensitiveProperties: {
+        chain_id: _chainId,
+        rpc_url: firstValidRPCUrl,
+        network_name: _chainName,
+        // Including network to override the default network
+        // property included in all events. For RPC type networks
+        // the MetaMetrics controller uses the rpcUrl for the network
+        // property.
+        network: firstValidRPCUrl,
+        symbol: ticker,
+        block_explorer_url: firstValidBlockExplorerUrl,
+        source: 'dapp',
+      },
+    });
+
     await updateRpcTarget(
       await requestUserApproval({
         origin,