1 files changed, 11 insertions, 6 deletions
diff --git a/js/util.ts b/js/util.ts
index 348e36a1f..033a2f754 100644
--- a/js/util.ts
+++ b/js/util.ts
@@ -71,9 +71,11 @@ export type Resolvable<T> = Promise<T> & ResolvableMethods<T>;
 // @internal
 export function createResolvable<T>(): Resolvable<T> {
   let methods: ResolvableMethods<T>;
-  const promise = new Promise<T>((resolve, reject) => {
-    methods = { resolve, reject };
-  });
+  const promise = new Promise<T>(
+    (resolve, reject): void => {
+      methods = { resolve, reject };
+    }
+  );
   // TypeScript doesn't know that the Promise callback occurs synchronously
   // therefore use of not null assertion (`!`)
   return Object.assign(promise, methods!) as Resolvable<T>;
@@ -92,9 +94,12 @@ export function unreachable(): never {
 // @internal
 export function hexdump(u8: Uint8Array): string {
   return Array.prototype.map
-    .call(u8, (x: number) => {
-      return ("00" + x.toString(16)).slice(-2);
-    })
+    .call(
+      u8,
+      (x: number): string => {
+        return ("00" + x.toString(16)).slice(-2);
+      }
+    )
     .join(" ");
 }