Fix missing explicit return types

Author: shreyasminocha

.eslintrc.json

@@ -1,3 +1,11 @@
 {
-  "extends": "./node_modules/gts/"
-}
+  "extends": "./node_modules/gts/",
+  "overrides": [
+    {
+      "files": "src/**/*.ts",
+      "rules": {
+        "@typescript-eslint/explicit-module-boundary-types": 1
+      }
+    }
+  ]
+}

src/electionguard/core/logging.ts

@@ -21,17 +21,17 @@ type LogStringType = string | (() => string);
  * Sets which logs are ignored. INFO gives all logs. WARN
  * gives only WARN and ERROR. ERROR gives only ERROR logs.
  */
-export function verbosity(type: LogTypes) {
+export function verbosity(type: LogTypes): void {
   logLevel = type;
 }
 
 /** Logs some information. */
-export function info(module: string, contents: LogStringType) {
+export function info(module: string, contents: LogStringType): void {
   common('INFO', module, contents);
 }
 
 /** Logs a warning. */
-export function warn(module: string, contents: LogStringType) {
+export function warn(module: string, contents: LogStringType): void {
   common('WARN', module, contents);
 }
 
@@ -73,6 +73,6 @@ export function getAllLogs(): string[] {
 }
 
 /** Prints all the logs to the console. */
-export function consoleAllLogs() {
+export function consoleAllLogs(): void {
   console.log(allLogs.join('\n'));
 }

src/electionguard/core/nonces.ts

@@ -43,7 +43,7 @@ export class Nonces implements Iterable<ElementModQ> {
   [Symbol.iterator](): Iterator<ElementModQ> {
     let counter = 0;
     return {
-      next: () => {
+      next: (): IteratorResult<ElementModQ> => {
         return {
           done: false,
           value: this.get(counter++),

src/electionguard/core/utils.ts

@@ -345,6 +345,6 @@ export function undefinedToNull<T>(x: T | undefined): T | null {
 }
 
 /** Converts a date to an ISO 8601-formatted string (without milliseconds). */
-export function dateToISOString(date: Date) {
+export function dateToISOString(date: Date): string {
   return `${date.toISOString().split('.')[0]}Z`;
 }