add blockchain install scripts

lib/blockchain/zcash.js

@@ -0,0 +1,37 @@
+const fs = require('fs')
+const path = require('path')
+
+const coinUtils = require('../coin-utils')
+
+const common = require('./common')
+
+module.exports = {setup}
+
+const es = common.es
+const logger = common.logger
+
+function setup (dataDir) {
+  es('sudo apt-get update')
+  es('sudo apt-get install libgomp1 -y')
+  const coinRec = coinUtils.getCryptoCurrency('ZEC')
+
+  common.firewall([coinRec.defaultPort])
+  logger.info('Fetching Zcash proofs, will take a while...')
+  es('zcash-fetch-params 2>&1')
+  logger.info('Finished fetching proofs.')
+  const config = buildConfig()
+  fs.writeFileSync(path.resolve(dataDir, 'zcash.conf'), config)
+  setupPm2(dataDir)
+}
+
+function buildConfig () {
+  return `mainnet=1
+addnode=mainnet.z.cash
+rpcuser=lamassuserver
+rpcpassword=${common.randomPass()}
+dbcache=500`
+}
+
+function setupPm2 (dataDir) {
+  es(`pm2 start /usr/local/bin/zcashd -- -datadir=${dataDir}`)
+}