fix: buffer typescript error in util.ts when parsing ArrayBuffer

src/libs/util.ts

@@ -12,8 +12,6 @@ import { deriveAddress, generateSeed, newIdentifier } from "@/libs/crypto";
 import { GenericServerRecord, containsHiddenDid } from "@/libs/endorserServer";
 import * as serverUtil from "@/libs/endorserServer";
 
-import { Buffer } from "buffer/";
-
 // If you edit this, check that the numbers still line up on the side in the alert (on mobile, too),
 // and make sure they can take all actions while the notification shows.
 export const ONBOARD_MESSAGE =
@@ -237,6 +235,19 @@ export const generateSaveAndActivateIdentity = async (): Promise<string> => {
   return newId.did;
 };
 
+function getBase64(subscription: PushSubscription, key: PushEncryptionKeyName) {
+  const buffer = subscription.getKey(key);
+  if (!buffer) {
+    return null;
+  }
+  const value = Buffer.from(buffer);
+  return value
+    .toString("base64")
+    .replace(/\+/g, "-")
+    .replace(/\//g, "_")
+    .replace(/=+$/, "");
+}
+
 export const sendTestThroughPushServer = async (
   subscription: PushSubscription,
   skipFilter: boolean,
@@ -253,18 +264,8 @@ export const sendTestThroughPushServer = async (
   // Use something other than "Daily Update" https://gitea.anomalistdesign.com/trent_larson/py-push-server/src/commit/3c0e196c11bc98060ec5934e99e7dbd591b5da4d/app.py#L213
   const DIRECT_PUSH_TITLE = "DIRECT_NOTIFICATION";
 
-  const auth = Buffer.from(subscription.getKey("auth"));
-  const authB64 = auth
-    .toString("base64")
-    .replace(/\+/g, "-")
-    .replace(/\//g, "_")
-    .replace(/=+$/, "");
-  const p256dh = Buffer.from(subscription.getKey("p256dh"));
-  const p256dhB64 = p256dh
-    .toString("base64")
-    .replace(/\+/g, "-")
-    .replace(/\//g, "_")
-    .replace(/=+$/, "");
+  const authB64 = getBase64(subscription, "auth");
+  const p256dhB64 = getBase64(subscription, "p256dh");
   const newPayload = {
     endpoint: subscription.endpoint,
     keys: {