feat: fetch from db auth secret

lib/new-admin/middlewares/session.js

@@ -1,32 +1,22 @@
-const fs = require('fs')
 const express = require('express')
 const router = express.Router()
-const hkdf = require('futoin-hkdf')
 const session = require('express-session')
 const PgSession = require('connect-pg-simple')(session)
-const mnemonicHelpers = require('../../mnemonic-helpers')
 const db = require('../../db')
 const options = require('../../options')
 const { USER_SESSIONS_TABLE_NAME } = require('../../constants')
-
+const { getOperatorId } = require('../../operator')
-const getSecret = () => {
-  const mnemonic = fs.readFileSync(options.mnemonicPath, 'utf8')
-  return hkdf(
-    mnemonicHelpers.toEntropyBuffer(mnemonic),
-    16,
-    { info: 'operator-id' }
-  ).toString('hex')
-}
 
 const hostname = options.hostname
 
-router.use('*', session({
+router.use('*', async () => {
+  return getOperatorId('authentication').then(secret => session({
     store: new PgSession({
       pgPromise: db,
       tableName: USER_SESSIONS_TABLE_NAME
     }),
     name: 'lamassu_sid',
-  secret: getSecret(),
+    secret: secret,
     resave: false,
     saveUninitialized: false,
     cookie: {
@@ -37,5 +27,6 @@ router.use('*', session({
       maxAge: 60 * 10 * 1000 // 10 minutes
     }
   }))
+})
 
 module.exports = router