Change seed file with a bip39 mnemonic (#207)

* Change seed file with a bip39 mnemonic

* Create helper for bip39 mnemonic

* Prod mode on lamassu-update-to-mnemonic script

* Fix standard styling issues

lib/coinatmradar/coinatmradar.js

@@ -6,6 +6,7 @@ const pify = require('pify')
 const fs = pify(require('fs'))
 
 const db = require('../db')
+const mnemonicHelpers = require('../mnemonic-helpers')
 const configManager = require('../config-manager')
 const options = require('../options')
 const logger = require('../logger')
@@ -129,17 +130,19 @@ function sendRadar (data) {
 
 function mapRecord (info) {
   const timestamp = new Date().toISOString()
-  return Promise.all([getMachines(info), fs.readFile(options.seedPath, 'utf8')])
-    .then(([machines, hex]) => ({
-      operatorId: computeOperatorId(Buffer.from(hex.trim(), 'hex')),
-      operator: {
-        name: null,
-        phone: null,
-        email: null
-      },
-      timestamp,
-      machines
-    }))
+  return Promise.all([getMachines(info), fs.readFile(options.mnemonicPath, 'utf8')])
+    .then(([machines, mnemonic]) => {
+      return {
+        operatorId: computeOperatorId(mnemonicHelpers.toEntropyBuffer(mnemonic)),
+        operator: {
+          name: null,
+          phone: null,
+          email: null
+        },
+        timestamp,
+        machines
+      }
+    })
 }
 
 function update (info) {

lib/mnemonic-helpers.js

@@ -0,0 +1,19 @@
+const bip39 = require('bip39')
+const os = require('os')
+
+function fromSeed (seed) {
+  const words = bip39.entropyToMnemonic(seed).split(' ')
+
+  let mnemonic = ''
+  for (let i = 0; i < words.length; i += 6) {
+    mnemonic += words.slice(i, i + 6).join(' ') + os.EOL
+  }
+  return mnemonic
+}
+
+function toEntropyBuffer (mnemonic) {
+  const hex = bip39.mnemonicToEntropy(mnemonic.split('\n').join(' ').trim())
+  return Buffer.from(hex.trim(), 'hex')
+}
+
+module.exports = { toEntropyBuffer, fromSeed }

lib/wallet.js

@@ -6,6 +6,7 @@ const configManager = require('./config-manager')
 const pify = require('pify')
 const fs = pify(require('fs'))
 
+const mnemonicHelpers = require('./mnemonic-helpers')
 const options = require('./options')
 const ph = require('./plugin-helper')
 const layer2 = require('./layer2')
@@ -24,20 +25,20 @@ function httpError (msg, code) {
 }
 
 function computeSeed (masterSeed) {
-  return hkdf(masterSeed, 32, {salt: 'lamassu-server-salt', info: 'wallet-seed'}).toString('hex')
+  return hkdf(masterSeed, 32, { salt: 'lamassu-server-salt', info: 'wallet-seed' }).toString('hex')
 }
 
 function fetchWallet (settings, cryptoCode) {
-  return fs.readFile(options.seedPath, 'utf8')
-    .then(hex => {
-      const masterSeed = Buffer.from(hex.trim(), 'hex')
+  return fs.readFile(options.mnemonicPath, 'utf8')
+    .then(mnemonic => {
+      const masterSeed = mnemonicHelpers.toEntropyBuffer(mnemonic)
       const plugin = configManager.cryptoScoped(cryptoCode, settings.config).wallet
       const wallet = ph.load(ph.WALLET, plugin)
       const rawAccount = settings.accounts[plugin]
       const account = _.set('seed', computeSeed(masterSeed), rawAccount)
       if (_.isFunction(wallet.run)) wallet.run(account)
 
-      return {wallet, account}
+      return { wallet, account }
     })
 }
 
@@ -46,7 +47,7 @@ const lastBalance = {}
 function _balance (settings, cryptoCode) {
   return fetchWallet(settings, cryptoCode)
     .then(r => r.wallet.balance(r.account, cryptoCode))
-    .then(balance => ({balance, timestamp: Date.now()}))
+    .then(balance => ({ balance, timestamp: Date.now() }))
     .then(r => {
       lastBalance[cryptoCode] = r
       return r
@@ -103,7 +104,7 @@ function mergeStatus (a, b) {
   if (!a) return b
   if (!b) return a
 
-  return {status: mergeStatusMode(a.status, b.status)}
+  return { status: mergeStatusMode(a.status, b.status) }
 }
 
 function mergeStatusMode (a, b) {
@@ -169,7 +170,7 @@ function getStatus (settings, tx, machineId) {
 
             const status = isAuthorized ? 'authorized' : unauthorizedStatus
 
-            return {status}
+            return { status }
           })
       }