use supervisor instead of pm2 for stability

lib/blockchain/litecoin.js

@@ -2,19 +2,21 @@ const fs = require('fs')
 const path = require('path')
 
 const coinUtils = require('../coin-utils')
+const options = require('../options')
 
 const common = require('./common')
 
 module.exports = {setup}
 
-const es = common.es
+const coinRec = coinUtils.getCryptoCurrency('LTC')
 
 function setup (dataDir) {
-  const coinRec = coinUtils.getCryptoCurrency('LTC')
   common.firewall([coinRec.defaultPort])
   const config = buildConfig()
   fs.writeFileSync(path.resolve(dataDir, coinRec.configFile), config)
-  setupPm2(dataDir)
+  const blockchainDir = options.blockchainDir
+  const cmd = `/usr/local/bin/${coinRec.daemon} -datadir=${blockchainDir}`
+  common.writeSupervisorConfig(coinRec, cmd)
 }
 
 function buildConfig () {
@@ -27,7 +29,3 @@ keypool=10000
 prune=4000
 daemon=0`
 }
-
-function setupPm2 (dataDir) {
-  es(`pm2 start /usr/local/bin/litecoind -- -datadir=${dataDir}`)
-}