From 8ca5a391af8da8b99e32204bd1a5dd7f40bdc96d Mon Sep 17 00:00:00 2001
From: Daniel Gasienica <daniel@signal.org>
Date: Wed, 25 Apr 2018 16:34:29 -0400
Subject: [PATCH] arrayBufferToObjectURL: Ensure `data` is `ArrayBuffer`

---
 ts/util/arrayBufferToObjectURL.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ts/util/arrayBufferToObjectURL.ts b/ts/util/arrayBufferToObjectURL.ts
index 29bdb9eca..f9c58c8d2 100644
--- a/ts/util/arrayBufferToObjectURL.ts
+++ b/ts/util/arrayBufferToObjectURL.ts
@@ -1,6 +1,8 @@
 /**
  * @prettier
  */
+import is from '@sindresorhus/is';
+
 import { MIMEType } from '../types/MIME';
 
 export const arrayBufferToObjectURL = ({
@@ -10,6 +12,10 @@ export const arrayBufferToObjectURL = ({
   data: ArrayBuffer;
   type: MIMEType;
 }): string => {
+  if (!is.arrayBuffer(data)) {
+    throw new TypeError('`data` must be an ArrayBuffer');
+  }
+
   const blob = new Blob([data], { type });
   return URL.createObjectURL(blob);
 };