Reduce unnecessary api calls

src/renderer/page/file/index.js

@@ -14,6 +14,7 @@ import { makeSelectCostInfoForUri } from 'redux/selectors/cost_info';
 import { selectShowNsfw } from 'redux/selectors/settings';
 import FilePage from './view';
 import { makeSelectCurrentParam } from 'redux/selectors/navigation';
+import { selectSubscriptions } from 'redux/selectors/subscriptions';
 
 const select = (state, props) => ({
   claim: makeSelectClaimForUri(props.uri)(state),
@@ -24,6 +25,7 @@ const select = (state, props) => ({
   tab: makeSelectCurrentParam('tab')(state),
   fileInfo: makeSelectFileInfoForUri(props.uri)(state),
   rewardedContentClaimIds: selectRewardContentClaimIds(state, props),
+  subscriptions: selectSubscriptions(state),
 });
 
 const perform = dispatch => ({

src/renderer/page/file/view.jsx

@@ -37,6 +37,11 @@ class FilePage extends React.PureComponent {
   }
 
   checkSubscriptionLatest(props) {
+    if (
+      props.subscriptions
+        .map(subscription => subscription.channelName)
+        .indexOf(props.claim.channel_name) !== -1
+    ) {
       props.checkSubscriptionLatest(
         {
           channelName: props.claim.channel_name,
@@ -51,6 +56,7 @@ class FilePage extends React.PureComponent {
         buildURI({ contentName: props.claim.name, claimId: props.claim.claim_id }, false)
       );
     }
+  }
 
   render() {
     const {