fix: handle errors when wallet is unreachable

lib/plugins/common/json-rpc.js

@@ -48,6 +48,7 @@ function split (str) {
 }
 
 function parseConf (confPath) {
+  try {
     const conf = fs.readFileSync(confPath)
     const lines = conf.toString().split('\n')
 
@@ -60,6 +61,8 @@ function parseConf (confPath) {
 
       res[keyVal[0]] = keyVal[1]
     }
-
     return res
+  } catch (e) {
+    throw new Error('wallet is currently not installed')
+  }
 }

lib/plugins/wallet/zcashd/zcashd.js

@@ -9,16 +9,22 @@ const E = require('../../../error')
 const cryptoRec = coinUtils.getCryptoCurrency('ZEC')
 const configPath = coinUtils.configPath(cryptoRec)
 const unitScale = cryptoRec.unitScale
-const config = jsonRpc.parseConf(configPath)
 
-const rpcConfig = {
+function rpcConfig () {
+  try {
+    const config = jsonRpc.parseConf(configPath)
+    return {
       username: config.rpcuser,
       password: config.rpcpassword,
       port: config.rpcport || cryptoRec.defaultPort
     }
+  } catch (err) {
+    throw err
+  }
+}
 
 function fetch (method, params) {
-  return jsonRpc.fetch(rpcConfig, method, params)
+  return jsonRpc.fetch(rpcConfig(), method, params)
 }
 
 function checkCryptoCode (cryptoCode) {