1 files changed, 8 insertions, 0 deletions
diff --git a/js/util.ts b/js/util.ts
index 6971ca1b9..efe0dcf84 100644
--- a/js/util.ts
+++ b/js/util.ts
@@ -83,3 +83,11 @@ export function notImplemented(): never {
 export function unreachable(): never {
   throw new Error("Code not reachable");
 }
+
+export function hexdump(u8: Uint8Array): string {
+  return Array.prototype.map
+    .call(u8, (x: number) => {
+      return ("00" + x.toString(16)).slice(-2);
+    })
+    .join(" ");
+}