Allow operation when no registry is available (#2980)

* Allow retrieval of native network balances without registry

* Remove debugging address

* Disable dapps when no registry is available

js/src/redux/providers/balances.js

@@ -32,6 +32,7 @@ export default class Balances {
     this._api = api;
     this._store = store;
     this._accountsInfo = null;
+    this._tokens = [];
   }
 
   start () {
@@ -50,7 +51,10 @@ export default class Balances {
         this._retrieveBalances();
       })
       .then((subscriptionId) => {
-        console.log('balances._subscribeAccountsInfo', 'subscriptionId', subscriptionId);
+        console.log('_subscribeAccountsInfo', 'subscriptionId', subscriptionId);
+      })
+      .catch((error) => {
+        console.warn('_subscribeAccountsInfo', error);
       });
   }
 
@@ -64,7 +68,10 @@ export default class Balances {
         this._retrieveTokens();
       })
       .then((subscriptionId) => {
-        console.log('balances._subscribeBlockNumber', 'subscriptionId', subscriptionId);
+        console.log('_subscribeBlockNumber', 'subscriptionId', subscriptionId);
+      })
+      .catch((error) => {
+        console.warn('_subscribeBlockNumber', error);
       });
   }
 
@@ -130,12 +137,13 @@ export default class Balances {
         this._retrieveBalances();
       })
       .catch((error) => {
-        console.error('balances._retrieveTokens', error);
+        console.warn('_retrieveTokens', error);
+        this._retrieveBalances();
       });
   }
 
   _retrieveBalances () {
-    if (!this._accountsInfo || !this._tokens) {
+    if (!this._accountsInfo) {
       return;
     }
 
@@ -186,7 +194,7 @@ export default class Balances {
         this._store.dispatch(getBalances(this._balances));
       })
       .catch((error) => {
-        console.error('balances._retrieveBalances', error);
+        console.warn('_retrieveBalances', error);
       });
   }
 }

js/src/views/Dapps/available.js

@@ -14,9 +14,11 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity. If not, see <http://www.gnu.org/licenses/>.
 
+import BigNumber from 'bignumber.js';
+
 import { parityNode } from '../../environment';
 
-const builtinApps = [
+const apps = [
   {
     id: '0xf9f2d620c2e08f83e45555247146c62185e4ab7cf82a4b9002a265a0d020348f',
     url: 'basiccoin',
@@ -73,7 +75,7 @@ const builtinApps = [
   }
 ];
 
-export default function () {
+export default function (api) {
   return fetch(`${parityNode}/api/apps`)
     .then((response) => {
       return response.ok
@@ -85,8 +87,19 @@ export default function () {
       return [];
     })
     .then((localApps) => {
+      return api.ethcore
+        .registryAddress()
+        .then((registryAddress) => {
+          if (new BigNumber(registryAddress).eq(0)) {
+            return [];
+          }
+
+          return apps;
+        })
+        .then((builtinApps) => {
           return builtinApps
             .concat(localApps.filter((app) => !['ui'].includes(app.id)))
             .sort((a, b) => a.name.localeCompare(b.name));
         });
+    });
 }

js/src/views/Dapps/dapps.js

@@ -42,16 +42,14 @@ export default class Dapps extends Component {
   }
 
   componentDidMount () {
-    fetchAvailable()
+    const { api } = this.context;
-    .then((available) => {
+
+    fetchAvailable(api).then((available) => {
       this.setState({
         available,
         hidden: readHiddenApps()
       });
       this.loadImages();
-    })
-    .catch((err) => {
-      console.error('error fetching available apps', err);
     });
   }