refactor: error handling on unconfigred wallet

lib/plugins/common/json-rpc.js

@@ -3,8 +3,9 @@ const axios = require('axios')
 const uuid = require('uuid')
 const fs = require('fs')
 const _ = require('lodash/fp')
+const coinUtils = require('../../coin-utils')
 
-module.exports = {fetch, parseConf}
+module.exports = { fetch, parseConf, rpcConfig }
 
 function fetch (account = {}, method, params) {
   params = _.defaultTo([], params)
@@ -63,3 +64,17 @@ function parseConf (confPath) {
 
   return res
 }
+
+function rpcConfig (cryptoRec) {
+  try {
+    const configPath = coinUtils.configPath(cryptoRec)
+    const config = parseConf(configPath)
+    return {
+      username: config.rpcuser,
+      password: config.rpcpassword,
+      port: config.rpcport || cryptoRec.defaultPort
+    }
+  } catch (err) {
+    throw new Error('Wallet is currently not installed')
+  }
+}