add blockchain install scripts

lib/blockchain/dash.js

@@ -0,0 +1,28 @@
+const fs = require('fs')
+const path = require('path')
+
+const coinUtils = require('../coin-utils')
+
+const common = require('./common')
+
+module.exports = {setup}
+
+const es = common.es
+
+function setup (dataDir) {
+  const coinRec = coinUtils.getCryptoCurrency('DASH')
+  common.firewall([coinRec.defaultPort])
+  const config = buildConfig()
+  fs.writeFileSync(path.resolve(dataDir, coinRec.configFile), config)
+  setupPm2(dataDir)
+}
+
+function buildConfig () {
+  return `rpcuser=lamassuserver
+rpcpassword=${common.randomPass()}
+dbcache=500`
+}
+
+function setupPm2 (dataDir) {
+  es(`pm2 start /usr/local/bin/dashd -- -datadir=${dataDir}`)
+}