ignore other empty buffers which should be null after protobuf decode

ts/receiver/contentMessage.ts

@@ -370,7 +370,12 @@ export async function innerHandleContentMessage(
   }
 
   if (content.dataMessage) {
-    // Are we not supposed to await here?
+    if (
+      content.dataMessage.profileKey &&
+      content.dataMessage.profileKey.length === 0
+    ) {
+      content.dataMessage.profileKey = null;
+    }
     await handleDataMessage(envelope, content.dataMessage);
     return;
   }
@@ -387,6 +392,12 @@ export async function innerHandleContentMessage(
     return;
   }
   if (content.typingMessage) {
+    if (
+      content.typingMessage.groupId &&
+      content.typingMessage.groupId.length === 0
+    ) {
+      content.typingMessage.groupId = null;
+    }
     await handleTypingMessage(envelope, content.typingMessage);
     return;
   }

ts/receiver/dataMessage.ts

@@ -83,9 +83,10 @@ function cleanAttachment(attachment: any) {
     ..._.omit(attachment, 'thumbnail'),
     id: attachment.id.toString(),
     key: attachment.key ? StringUtils.decode(attachment.key, 'base64') : null,
-    digest: attachment.digest
+    digest:
-      ? StringUtils.decode(attachment.digest, 'base64')
+      attachment.digest && attachment.digest.length > 0
-      : null,
+        ? StringUtils.decode(attachment.digest, 'base64')
+        : null,
   };
 }
 
@@ -138,7 +139,7 @@ function cleanAttachments(decrypted: any) {
     quote.attachments = (quote.attachments || []).map((item: any) => {
       const { thumbnail } = item;
 
-      if (!thumbnail) {
+      if (!thumbnail || thumbnail.length === 0) {
         return item;
       }
 

ts/receiver/multidevice.ts

@@ -215,6 +215,10 @@ function parseContacts(arrbuf: ArrayBuffer): Array<any> {
         new Uint8Array(nextBuffer)
       );
 
+      if (proto.profileKey && proto.profileKey.length === 0) {
+        proto.profileKey = null;
+      }
+
       buffer.skip(len);
 
       if (proto.avatar) {
@@ -259,7 +263,7 @@ export async function handleContacts(
   window.log.info('contact sync');
   // const { blob } = contacts;
 
-  if (!contacts.data) {
+  if (!contacts.data || contacts.data.length === 0) {
     window.log.error('Contacts without data');
     return;
   }

ts/receiver/receiver.ts

@@ -48,7 +48,6 @@ interface ReqOptions {
 const incomingMessagePromises: Array<Promise<any>> = [];
 
 async function handleEnvelope(envelope: EnvelopePlus) {
-  const { textsecure } = window;
   // TODO: enable below
 
   // if (this.stoppingProcessing) {
@@ -59,7 +58,7 @@ async function handleEnvelope(envelope: EnvelopePlus) {
     return onDeliveryReceipt(envelope.source, envelope.timestamp);
   }
 
-  if (envelope.content) {
+  if (envelope.content && envelope.content.length > 0) {
     return handleContentMessage(envelope);
   }