add some linting

.eslintrc.js

@@ -9,6 +9,9 @@ module.exports = {
     "@vue/typescript/recommended",
     "@vue/prettier"
   ],
+  globals: {
+    NodeJS: true
+  },
   parserOptions: {
     ecmaVersion: 2020
   },

babel.config.js

@@ -1,3 +1,3 @@
 module.exports = {
-  presets: ["@vue/cli-plugin-babel/preset"],
+  presets: ["@vue/cli-plugin-babel/preset"]
 };

src/App.vue

@@ -32,7 +32,6 @@ import { mapActions, mapState } from "vuex";
 import { ACTIONS } from "./constants/store/actions";
 import KyaModal from "./components/KYAModal.vue";
 import { isPopup } from "./utils/browserApi";
-import { MAINNET } from "./constants/ergo";
 import WalletLogo from "./components/WalletLogo.vue";
 
 function runSetInterval(callback: () => void, ms: number): NodeJS.Timer {
@@ -78,6 +77,8 @@ export default defineComponent({
       if (isPopup()) {
         return "max-w-365px";
       }
+
+      return undefined;
     }
   },
   methods: {

src/components/DropDown.vue

@@ -54,7 +54,7 @@ export default defineComponent({
     },
     calcPosition() {
       const clientHeight = window.innerHeight || document.documentElement.clientHeight;
-      let el = this.$refs.its as HTMLElement;
+      const el = this.$refs.its as HTMLElement;
       if (!el) {
         return;
       }

src/types/errors.ts

@@ -6,7 +6,7 @@ export class TxSignError extends Error {
 }
 
 export class PasswordError extends Error {
-  constructor(errorMessage: string = "Wrong password.") {
+  constructor(errorMessage = "Wrong password.") {
     super(errorMessage);
     this.name = this.constructor.name;
   }

src/utils/globalFilters.ts

@@ -58,11 +58,11 @@ export const filters = {
       return new BigNumber(0);
     }
 
-    let d = Math.ceil(Math.log10(num < 0 ? -num : num));
-    let power = n - d;
+    const d = Math.ceil(Math.log10(num < 0 ? -num : num));
+    const power = n - d;
 
-    let magnitude = Math.pow(10, power);
-    let shifted = Math.round(num * magnitude);
+    const magnitude = Math.pow(10, power);
+    const shifted = Math.round(num * magnitude);
     return new BigNumber(shifted / magnitude);
   },
   walletType(type: WalletType): string {

src/utils/objectPool.ts

@@ -20,7 +20,7 @@ class ObjectPool<ObjectType, KeyType> {
       item.alive = true;
       item.object = object;
     } else {
-      const index = findIndex(this._pool, item => !item.alive);
+      const index = findIndex(this._pool, (item) => !item.alive);
 
       if (index > -1) {
         this._pool[index].object = object;
@@ -56,7 +56,7 @@ class ObjectPool<ObjectType, KeyType> {
   }
 
   public getPoolItem(key: KeyType): PoolItem<ObjectType, KeyType> | undefined {
-    return find(this._pool, item => item.key === key);
+    return find(this._pool, (item) => item.key === key);
   }
 }
 

tests/unit/bigNumberHelper.spec.ts

@@ -21,7 +21,7 @@ describe("bigNumber helpers", () => {
   });
 
   it("undecimalize numbers with various decimal places", () => {
-    let base = "1";
+    const base = "1";
     for (let i = 0; i < 20; i++) {
       base.padEnd(i, "0");
       expect(undecimalize(new BigNumber(base), i).toString()).toEqual(