don't trade if no exchange

lib/exchange.js

@@ -8,11 +8,16 @@ function noExchangeError (cryptoCode) {
   return err
 }
 
+function lookupExchange (cryptoCode) {
+  const settings = settingsLoader.settings()
+  return configManager.cryptoScoped(cryptoCode, settings.config).exchange
+}
+
 function fetchExchange (cryptoCode) {
   return Promise.resolve()
   .then(() => {
     const settings = settingsLoader.settings()
-    const plugin = configManager.cryptoScoped(cryptoCode, settings.config).exchange
+    const plugin = lookupExchange(cryptoCode)
     if (!plugin) throw noExchangeError(cryptoCode)
     const account = settings.accounts[plugin]
     const exchange = require('lamassu-' + plugin)
@@ -31,7 +36,12 @@ function sell (cryptoAtoms, fiatCode, cryptoCode) {
   .then(r => r.exchange.sell(r.account, cryptoAtoms, fiatCode, cryptoCode))
 }
 
+function active (fiatCode, cryptoCode) {
+  return !!lookupExchange(cryptoCode)
+}
+
 module.exports = {
   buy,
-  sell
+  sell,
+  active
 }

lib/plugins.js

@@ -162,6 +162,8 @@ function trade (deviceId, rawTrade) {
   .then(() => {
     const market = [fiatCode, cryptoCode].join('')
 
+    if (!exchange.active(cryptoCode)) return
+
     logger.debug('[%s] Pushing trade: %d', market, cryptoAtoms)
     if (!tradesQueues[market]) tradesQueues[market] = []
     tradesQueues[market].push({
@@ -409,6 +411,8 @@ function executeTrades () {
 }
 
 function executeTradesForMarket (settings, fiatCode, cryptoCode) {
+  if (!exchange.active(cryptoCode)) return
+
   const market = [fiatCode, cryptoCode].join('')
   logger.debug('[%s] checking for trades', market)
 
@@ -489,9 +493,7 @@ function checkNotification () {
   .then(results => {
     if (results && results.length > 0) logger.debug('Successfully sent alerts')
   })
-  .catch(err => {
-    logger.error(err)
-  })
+  .catch(logger.error)
 }
 
 function checkDeviceBalances (deviceId) {

lib/ticker.js

@@ -9,6 +9,9 @@ function getRates (fiatCode, cryptoCode) {
     const settings = settingsLoader.settings()
     const config = settings.config
     const plugin = configManager.cryptoScoped(cryptoCode, config).ticker
+
+    if (!plugin) throw new Error('No ticker plugin defined')
+
     const account = settings.accounts[plugin]
     const ticker = require('lamassu-' + plugin)