From ca32d7aac007806f449bb2a76c7b1b984ce1a251 Mon Sep 17 00:00:00 2001
From: Jonathan Rainville <rainville.jonathan@gmail.com>
Date: Tue, 31 Jul 2018 09:59:27 -0400
Subject: [PATCH] warn if mismatch on network id

---
 lib/constants.json                        |  8 +++++++-
 lib/modules/blockchain_connector/index.js | 14 +++++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/lib/constants.json b/lib/constants.json
index 31b77984..bedc38d2 100644
--- a/lib/constants.json
+++ b/lib/constants.json
@@ -38,7 +38,13 @@
     "blockchainExit": "blockchainExit",
     "init": "init",
     "initiated": "initiated",
-    "servicePortOnProxy": 10
+    "servicePortOnProxy": 10,
+    "networkIds": {
+      "mainnet": 1,
+      "testnet": 3,
+      "ropsten": 3,
+      "rinkeby": 4
+    }
   },
   "storage": {
     "init": "init",
diff --git a/lib/modules/blockchain_connector/index.js b/lib/modules/blockchain_connector/index.js
index 5bc14da1..25aa94a2 100644
--- a/lib/modules/blockchain_connector/index.js
+++ b/lib/modules/blockchain_connector/index.js
@@ -2,6 +2,7 @@ const Web3 = require('web3');
 const async = require('async');
 const Provider = require('./provider.js');
 const utils = require('../../utils/utils');
+const constants = require('../../constants');
 
 const WEB3_READY = 'web3Ready';
 
@@ -18,7 +19,6 @@ class BlockchainConnector {
     this.isDev = options.isDev;
     this.web3Endpoint = '';
     this.isWeb3Ready = false;
-    this.web3StartedInProcess = false;
 
     self.events.setCommandHandler("blockchain:web3:isReady", (cb) => {
       cb(self.isWeb3Ready);
@@ -74,6 +74,18 @@ class BlockchainConnector {
 
     self.events.request("processes:launch", "blockchain", () => {
       self.provider.startWeb3Provider(() => {
+        this.web3.eth.net.getId()
+          .then(id => {
+            let networkId = self.blockchainConfig.networkId;
+            if (!networkId && constants.blockchain.networkIds[self.blockchainConfig.networkType]) {
+              networkId = constants.blockchain.networkIds[self.blockchainConfig.networkType];
+            }
+            if (id !== networkId) {
+              self.logger.warn(__('Connected to a blockchain node on network {{realId}} while your config specifies {{configId}}', {realId: id, configId: networkId}));
+              self.logger.warn(__('Make sure you started the right blockchain node'));
+            }
+          })
+          .catch(console.error);
         self.provider.fundAccounts(() => {
           self.isWeb3Ready = true;
           self.events.emit(WEB3_READY);