refactor(backend): throw exception instead of returning null

src/components/UserInfo.vue

@@ -344,7 +344,7 @@ export default {
     },
     async resetEditedValues() {
       this.editMode = false;
-      await this.getProfile();
+      await this.reloadProfile();
     },
     async saveProfile() {
       await this.backendAuth('sendProfileData', {
@@ -363,25 +363,21 @@ export default {
       await this.backendAuth('sendProfileData', data);
       await this.resetEditedValues();
     },
-    reloadData() {
-      this.getProfile();
-      Backend.getSenderStats(this.address).then((stats) => {
-        this.userStats = stats;
-      });
+    async reloadData() {
+      await Promise.all([
+        this.reloadProfile(),
+        Backend.getSenderStats(this.address).then((stats) => {
+          this.userStats = stats;
+        }),
+      ]);
     },
-    async getProfile() {
-      Backend.getProfile(this.address)
-        .then((profile) => {
-          if (!profile) {
-            return;
-          }
-          this.profile = profile;
-          this.profile.location = this.profile.location || '';
-          this.profile.biography = this.profile.biography || '';
-          this.profile.coverImage = this.profile.coverImage || '';
-          this.$store.commit('setUserProfile', profile);
-        })
-        .catch(console.error);
+    async reloadProfile() {
+      this.profile = {
+        location: '',
+        biography: '',
+        coverImage: '',
+        ...await Backend.getProfile(this.address),
+      };
     },
   },
 };

src/components/tipRecords/Author.vue

@@ -48,8 +48,7 @@ export default {
     },
   },
   async mounted() {
-    const profile = await Backend.getProfile(this.address);
-    this.name = profile ? profile.preferredChainName : null;
+    this.name = (await Backend.getProfile(this.address)).preferredChainName;
   },
 };
 </script>

src/components/tipRecords/TipPreview.vue

@@ -192,7 +192,8 @@ export default {
       return this.tip?.linkPreview?.title || '';
     },
     tipPreviewImage() {
-      return this.isPreviewToBeVisualized && this.tip.linkPreview.image !== null ? Backend.getTipPreviewUrl(this.tip.linkPreview.image) : '';
+      return this.isPreviewToBeVisualized && this.tip.linkPreview.image !== null
+        ? Backend.getTipPreviewUrl(this.tip.linkPreview.image) : '';
     },
     isPreviewToBeVisualized() {
       return this.tip.linkPreview?.description || this.tip.linkPreview?.title;

src/store/index.js

@@ -51,13 +51,7 @@ export default new Vuex.Store({
     },
     async updateTokensBalanceAndPrice({ state: { address, middleware }, commit, dispatch }) {
       const tokens = await Backend.getTokenBalances(address);
-      let knownTokens;
-      try {
-        knownTokens = (await Backend.getWordRegistry()).map((item) => item.tokenAddress);
-      } catch (error) {
-        handleUnknownError(error);
-        return;
-      }
+      const knownTokens = (await Backend.getWordRegistry()).map((item) => item.tokenAddress);
       if (!middleware) await dispatch('initMiddleware');
       await Promise.all(Object.entries(tokens).map(async ([token]) => {
         commit('addTokenBalance', {
@@ -67,8 +61,7 @@ export default new Vuex.Store({
         if (knownTokens.includes(token)) {
           commit('addTokenPrice', {
             token,
-            price: await Backend.getWordSaleDetailsByToken(token)
-              .then((s) => s.buyPrice).catch(() => null),
+            price: await Backend.getWordSaleDetailsByToken(token).then((s) => s.buyPrice),
           });
         }
       }));
@@ -114,7 +107,10 @@ export default new Vuex.Store({
         dispatch('updatePinnedItems'),
         dispatch('updateUserProfile'),
         (async () => {
-          const balance = await sdk.balance(address).catch(() => 0);
+          const balance = await sdk.balance(address).catch((error) => {
+            if (error.status !== 404) handleUnknownError(error);
+            return 0;
+          });
           commit('updateBalance', balance);
         })(),
         dispatch('updateTokensBalanceAndPrice'),

src/store/modules/backend.js

@@ -86,8 +86,6 @@ export default {
         Backend.getTipById(id),
         Backend.getTipComments(id),
       ]);
-      // TODO: Remove after backend methods start to throw exceptions on not found
-      if (!tip) throw new Error(`Can't find tip with id: ${id}`);
       commit('setTip', {
         id,
         value: {
@@ -101,8 +99,6 @@ export default {
     },
     async reloadComment({ commit }, id) {
       const value = await Backend.getCommentById(id);
-      // TODO: Remove after backend methods start to throw exceptions on not found
-      if (!value) throw new Error(`Can't find comment with id: ${id}`);
       commit('setComment', { id, value });
     },
     async awaitTip(_, id) {
@@ -120,7 +116,7 @@ export default {
       commit('setStats', { ...stats1, ...stats2, height });
     },
     async reloadPrices({ commit }) {
-      commit('setPrices', (await Backend.getPrice())?.aeternity);
+      commit('setPrices', (await Backend.getPrice()).aeternity);
     },
     // eslint-disable-next-line consistent-return
     async callWithAuth({

src/utils/backend.js

@@ -1,29 +1,9 @@
-export const wrapTry = async (promise) => {
-  try {
-    return promise.then((res) => {
-      if (!res) {
-        console.error(new Error('Response is undefined'));
-        return null;
-      }
-      if (!res.ok) throw new Error(`Request failed with ${res.status}`);
-      return res.json();
-    }).catch((error) => {
-      console.error(error);
-      return null;
-    });
-  } catch (error) {
-    console.error(error);
-    return null;
-  }
-};
+import { fetchJson } from '.';
 
-const backendFetch = (path, ...args) => wrapTry(
-  fetch(`${process.env.VUE_APP_BACKEND_URL}/${path}`, ...args).catch((err) => console.error(err)),
+const backendFetch = (path, ...args) => fetchJson(
+  `${process.env.VUE_APP_BACKEND_URL}/${path}`, ...args,
 );
 
-const backendFetchNoTimeout = (path, ...args) => fetch(`${process.env.VUE_APP_BACKEND_URL}/${path}`, ...args)
-  .catch((err) => console.error(err));
-
 export default class Backend {
   static getTipComments = async (tipId) => backendFetch(`comment/api/tip/${encodeURIComponent(tipId)}`);
 
@@ -108,7 +88,7 @@ export default class Backend {
     return backendFetch(`tips${query}`);
   };
 
-  static addToken = async (address) => backendFetchNoTimeout('tokenCache/addToken', {
+  static addToken = async (address) => backendFetch('tokenCache/addToken', {
     method: 'post',
     body: JSON.stringify({ address }),
     headers: { 'Content-Type': 'application/json' },
@@ -129,7 +109,8 @@ export default class Backend {
     if (ordering) queryParams.set('ordering', ordering);
     if (direction) queryParams.set('direction', direction);
     if (search) queryParams.set('search', search);
-    return process.env.VUE_APP_CONTRACT_V2_ADDRESS ? backendFetch(`tokenCache/wordRegistry?${queryParams.toString()}`) : Promise.resolve({});
+    return process.env.VUE_APP_CONTRACT_V2_ADDRESS
+      ? backendFetch(`tokenCache/wordRegistry?${queryParams.toString()}`) : Promise.resolve([]);
   }
 
   static getWordSaleVotesDetails = async (address) => backendFetch(`tokenCache/wordSaleVotesDetails/${address}`);