From 2b2a7797160f7bba6afa700053a778e3230e4ecf Mon Sep 17 00:00:00 2001
From: Kosta Korenkov <kosta@whoot.me>
Date: Mon, 4 Dec 2017 18:02:02 +0300
Subject: [PATCH] add rinkeby network support

---
 README.md | 5 +++++
 index.js  | 4 +++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 800cc1b..b335d21 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,11 @@ wget https://raw.githubusercontent.com/acebusters/geth-healthcheck/master/index.
 ETHERSCAN_API_KEY=<etherscan_api_key> PORT=50336 node index.js
 ```
 
+for rinkeby network:
+```
+ETHERSCAN_API_KEY=<etherscan_api_key> PORT=50336 NETWORK=rinkeby node index.js
+```
+
 Make sure it is detached from the terminal. Make sure the port is open for incoming connections.
 
 ## License
diff --git a/index.js b/index.js
index 2f495ce..7ba1094 100644
--- a/index.js
+++ b/index.js
@@ -2,7 +2,9 @@ const http = require('http');
 const https = require('https');
 const { exec } = require('child_process');
 
-const ETHERSCAN_URL = `https://api.etherscan.io/api?module=proxy&action=eth_blockNumber&apikey=${process.env.ETHERSCAN_API_KEY}`;
+const etherscanPrefix = process.env.NETWORK == 'rinkeby' ? 'rinkeby' : 'api';
+
+const ETHERSCAN_URL = `https://${etherscanPrefix}.etherscan.io/api?module=proxy&action=eth_blockNumber&apikey=${process.env.ETHERSCAN_API_KEY}`;
 const MAX_BLOCK_DIFFERENCE = 3;
 
 const getLocalBlockNum = () => {