Feat: crypto balance notifications saving in DB

Chore: add new column "detail" to transactions table migration

Feat: check if older notification is valid before sending new one

Feat: error saving to database

Fix: fix error when invalidating notification on
clearCryptoBalanceNotifications
Chre: code refactor in new-settings-loader for simplicity
Chore: refactor code on notifier and merge similar functions

lib/notifier/utils.js

@@ -1,5 +1,7 @@
 const _ = require('lodash/fp')
 const crypto = require('crypto')
+const numeral = require('numeral')
+const prettyMs = require('pretty-ms')
 
 const coinUtils = require('../coin-utils')
 const {
@@ -143,6 +145,14 @@ const buildTransactionMessage = (tx, rec, highValueTx, machineName, customer) =>
   }, highValueTx]
 }
 
+function formatCurrency(num, code) {
+  return numeral(num).format('0,0.00') + ' ' + code
+}
+
+function formatAge (age, settings) {
+  return prettyMs(age, settings)
+}
+
 module.exports = {
   codeDisplay,
   parseEventNote,
@@ -155,5 +165,7 @@ module.exports = {
   shouldNotAlert,
   buildAlertFingerprint,
   sendNoAlerts,
-  buildTransactionMessage
+  buildTransactionMessage,
+  formatCurrency,
+  formatAge
 }