add version

config.js

@@ -1,6 +1,7 @@
 require('dotenv').config()
 
 module.exports = {
+  version: '1.0',
   netId: Number(process.env.NET_ID) || 42,
   redisUrl: process.env.REDIS_URL,
   rpcUrl: process.env.RPC_URL || 'https://kovan.infura.io/v3/a3f4d001c1fc4a359ea70dd27fd9cb51',

src/index.js

@@ -1,5 +1,5 @@
 const express = require('express')
-const { netId, port, relayerServiceFee } = require('../config')
+const { netId, port, relayerServiceFee, version } = require('../config')
 const relayController = require('./relayController')
 const { fetcher, web3 } = require('./instances')
 const { getMixers } = require('./utils')
@@ -31,7 +31,16 @@ app.get('/', function (req, res) {
 app.get('/status', async function (req, res) {
   let nonce = await redisClient.get('nonce')
   const { ethPrices, gasPrices } = fetcher
-  res.json({ relayerAddress: web3.eth.defaultAccount, mixers, gasPrices, netId, ethPrices, relayerServiceFee, nonce })
+  res.json({ 
+    relayerAddress: web3.eth.defaultAccount,
+    mixers,
+    gasPrices,
+    netId,
+    ethPrices,
+    relayerServiceFee,
+    nonce,
+    version
+  })
 })
 
 app.post('/relay', relayController)