feat: backport remote BTC node support

lib/environment-helper.js

@@ -1,3 +1,21 @@
 const path = require('path')
 
+const isDevMode = () => process.env.NODE_ENV === 'development'
+const isProdMode = () => process.env.NODE_ENV === 'production'
+
 require('dotenv').config({ path: path.resolve(__dirname, '../.env') })
+
+function isRemoteNode (crypto) {
+  return process.env[`${crypto.cryptoCode}_NODE_LOCATION`] === 'remote'
+}
+
+function isRemoteWallet (crypto) {
+  return process.env[`${crypto.cryptoCode}_WALLET_LOCATION`] === 'remote'
+}
+
+module.exports = {
+  isDevMode,
+  isProdMode,
+  isRemoteNode,
+  isRemoteWallet
+}